Camera

#include <NdkCameraCaptureSession.h>
#include <NdkCameraDevice.h>
#include <NdkCameraError.h>
#include <NdkCameraManager.h>
#include <NdkCameraMetadata.h>
#include <NdkCameraMetadataTags.h>
#include <NdkCaptureRequest.h>

Summary

Enumerations

Anonymous Enum 69{
  CAPTURE_FAILURE_REASON_FLUSHED = 0,
  CAPTURE_FAILURE_REASON_ERROR
}
enum
Enum for describing error reason in ACameraCaptureFailure.
Anonymous Enum 70{
  CAPTURE_SEQUENCE_ID_NONE = -1
}
enum
Anonymous Enum 71{
  ERROR_CAMERA_IN_USE = 1,
  ERROR_MAX_CAMERAS_IN_USE = 2,
  ERROR_CAMERA_DISABLED = 3,
  ERROR_CAMERA_DEVICE = 4,
  ERROR_CAMERA_SERVICE = 5
}
enum
Enum for ACameraDevice_ErrorStateCallback error code.
Anonymous Enum 72{
  ACAMERA_TYPE_BYTE = 0,
  ACAMERA_TYPE_INT32 = 1,
  ACAMERA_TYPE_FLOAT = 2,
  ACAMERA_TYPE_INT64 = 3,
  ACAMERA_TYPE_DOUBLE = 4,
  ACAMERA_TYPE_RATIONAL = 5,
  ACAMERA_NUM_TYPES
}
enum
Possible data types of a metadata entry.
ACameraDevice_request_template{
  TEMPLATE_PREVIEW = 1,
  TEMPLATE_STILL_CAPTURE = 2,
  TEMPLATE_RECORD = 3,
  TEMPLATE_VIDEO_SNAPSHOT = 4,
  TEMPLATE_ZERO_SHUTTER_LAG = 5,
  TEMPLATE_MANUAL = 6
}
enum
acamera_metadata_enum_acamera_black_level_lock{
  ACAMERA_BLACK_LEVEL_LOCK_OFF = 0,
  ACAMERA_BLACK_LEVEL_LOCK_ON = 1
}
enum
acamera_metadata_enum_acamera_color_correction_aberration_mode{
  ACAMERA_COLOR_CORRECTION_ABERRATION_MODE_OFF = 0,
  ACAMERA_COLOR_CORRECTION_ABERRATION_MODE_FAST = 1,
  ACAMERA_COLOR_CORRECTION_ABERRATION_MODE_HIGH_QUALITY = 2
}
enum
acamera_metadata_enum_acamera_color_correction_mode{
  ACAMERA_COLOR_CORRECTION_MODE_TRANSFORM_MATRIX = 0,
  ACAMERA_COLOR_CORRECTION_MODE_FAST = 1,
  ACAMERA_COLOR_CORRECTION_MODE_HIGH_QUALITY = 2
}
enum
Enumeration definitions for the various entries that need them.
acamera_metadata_enum_acamera_control_ae_antibanding_mode{
  ACAMERA_CONTROL_AE_ANTIBANDING_MODE_OFF = 0,
  ACAMERA_CONTROL_AE_ANTIBANDING_MODE_50HZ = 1,
  ACAMERA_CONTROL_AE_ANTIBANDING_MODE_60HZ = 2,
  ACAMERA_CONTROL_AE_ANTIBANDING_MODE_AUTO = 3
}
enum
acamera_metadata_enum_acamera_control_ae_lock{
  ACAMERA_CONTROL_AE_LOCK_OFF = 0,
  ACAMERA_CONTROL_AE_LOCK_ON = 1
}
enum
acamera_metadata_enum_acamera_control_ae_lock_available{
  ACAMERA_CONTROL_AE_LOCK_AVAILABLE_FALSE = 0,
  ACAMERA_CONTROL_AE_LOCK_AVAILABLE_TRUE = 1
}
enum
acamera_metadata_enum_acamera_control_ae_mode{
  ACAMERA_CONTROL_AE_MODE_OFF = 0,
  ACAMERA_CONTROL_AE_MODE_ON = 1,
  ACAMERA_CONTROL_AE_MODE_ON_AUTO_FLASH = 2,
  ACAMERA_CONTROL_AE_MODE_ON_ALWAYS_FLASH = 3,
  ACAMERA_CONTROL_AE_MODE_ON_AUTO_FLASH_REDEYE = 4,
  ACAMERA_CONTROL_AE_MODE_ON_EXTERNAL_FLASH = 5
}
enum
acamera_metadata_enum_acamera_control_ae_precapture_trigger{
  ACAMERA_CONTROL_AE_PRECAPTURE_TRIGGER_IDLE = 0,
  ACAMERA_CONTROL_AE_PRECAPTURE_TRIGGER_START = 1,
  ACAMERA_CONTROL_AE_PRECAPTURE_TRIGGER_CANCEL = 2
}
enum
acamera_metadata_enum_acamera_control_ae_state{
  ACAMERA_CONTROL_AE_STATE_INACTIVE = 0,
  ACAMERA_CONTROL_AE_STATE_SEARCHING = 1,
  ACAMERA_CONTROL_AE_STATE_CONVERGED = 2,
  ACAMERA_CONTROL_AE_STATE_LOCKED = 3,
  ACAMERA_CONTROL_AE_STATE_FLASH_REQUIRED = 4,
  ACAMERA_CONTROL_AE_STATE_PRECAPTURE = 5
}
enum
acamera_metadata_enum_acamera_control_af_mode{
  ACAMERA_CONTROL_AF_MODE_OFF = 0,
  ACAMERA_CONTROL_AF_MODE_AUTO = 1,
  ACAMERA_CONTROL_AF_MODE_MACRO = 2,
  ACAMERA_CONTROL_AF_MODE_CONTINUOUS_VIDEO = 3,
  ACAMERA_CONTROL_AF_MODE_CONTINUOUS_PICTURE = 4,
  ACAMERA_CONTROL_AF_MODE_EDOF = 5
}
enum
acamera_metadata_enum_acamera_control_af_scene_change{
  ACAMERA_CONTROL_AF_SCENE_CHANGE_NOT_DETECTED = 0,
  ACAMERA_CONTROL_AF_SCENE_CHANGE_DETECTED = 1
}
enum
acamera_metadata_enum_acamera_control_af_state{
  ACAMERA_CONTROL_AF_STATE_INACTIVE = 0,
  ACAMERA_CONTROL_AF_STATE_PASSIVE_SCAN = 1,
  ACAMERA_CONTROL_AF_STATE_PASSIVE_FOCUSED = 2,
  ACAMERA_CONTROL_AF_STATE_ACTIVE_SCAN = 3,
  ACAMERA_CONTROL_AF_STATE_FOCUSED_LOCKED = 4,
  ACAMERA_CONTROL_AF_STATE_NOT_FOCUSED_LOCKED = 5,
  ACAMERA_CONTROL_AF_STATE_PASSIVE_UNFOCUSED = 6
}
enum
acamera_metadata_enum_acamera_control_af_trigger{
  ACAMERA_CONTROL_AF_TRIGGER_IDLE = 0,
  ACAMERA_CONTROL_AF_TRIGGER_START = 1,
  ACAMERA_CONTROL_AF_TRIGGER_CANCEL = 2
}
enum
acamera_metadata_enum_acamera_control_awb_lock{
  ACAMERA_CONTROL_AWB_LOCK_OFF = 0,
  ACAMERA_CONTROL_AWB_LOCK_ON = 1
}
enum
acamera_metadata_enum_acamera_control_awb_lock_available{
  ACAMERA_CONTROL_AWB_LOCK_AVAILABLE_FALSE = 0,
  ACAMERA_CONTROL_AWB_LOCK_AVAILABLE_TRUE = 1
}
enum
acamera_metadata_enum_acamera_control_awb_mode{
  ACAMERA_CONTROL_AWB_MODE_OFF = 0,
  ACAMERA_CONTROL_AWB_MODE_AUTO = 1,
  ACAMERA_CONTROL_AWB_MODE_INCANDESCENT = 2,
  ACAMERA_CONTROL_AWB_MODE_FLUORESCENT = 3,
  ACAMERA_CONTROL_AWB_MODE_WARM_FLUORESCENT = 4,
  ACAMERA_CONTROL_AWB_MODE_DAYLIGHT = 5,
  ACAMERA_CONTROL_AWB_MODE_CLOUDY_DAYLIGHT = 6,
  ACAMERA_CONTROL_AWB_MODE_TWILIGHT = 7,
  ACAMERA_CONTROL_AWB_MODE_SHADE = 8
}
enum
acamera_metadata_enum_acamera_control_awb_state{
  ACAMERA_CONTROL_AWB_STATE_INACTIVE = 0,
  ACAMERA_CONTROL_AWB_STATE_SEARCHING = 1,
  ACAMERA_CONTROL_AWB_STATE_CONVERGED = 2,
  ACAMERA_CONTROL_AWB_STATE_LOCKED = 3
}
enum
acamera_metadata_enum_acamera_control_capture_intent{
  ACAMERA_CONTROL_CAPTURE_INTENT_CUSTOM = 0,
  ACAMERA_CONTROL_CAPTURE_INTENT_PREVIEW = 1,
  ACAMERA_CONTROL_CAPTURE_INTENT_STILL_CAPTURE = 2,
  ACAMERA_CONTROL_CAPTURE_INTENT_VIDEO_RECORD = 3,
  ACAMERA_CONTROL_CAPTURE_INTENT_VIDEO_SNAPSHOT = 4,
  ACAMERA_CONTROL_CAPTURE_INTENT_ZERO_SHUTTER_LAG = 5,
  ACAMERA_CONTROL_CAPTURE_INTENT_MANUAL = 6,
  ACAMERA_CONTROL_CAPTURE_INTENT_MOTION_TRACKING = 7
}
enum
acamera_metadata_enum_acamera_control_effect_mode{
  ACAMERA_CONTROL_EFFECT_MODE_OFF = 0,
  ACAMERA_CONTROL_EFFECT_MODE_MONO = 1,
  ACAMERA_CONTROL_EFFECT_MODE_NEGATIVE = 2,
  ACAMERA_CONTROL_EFFECT_MODE_SOLARIZE = 3,
  ACAMERA_CONTROL_EFFECT_MODE_SEPIA = 4,
  ACAMERA_CONTROL_EFFECT_MODE_POSTERIZE = 5,
  ACAMERA_CONTROL_EFFECT_MODE_WHITEBOARD = 6,
  ACAMERA_CONTROL_EFFECT_MODE_BLACKBOARD = 7,
  ACAMERA_CONTROL_EFFECT_MODE_AQUA = 8
}
enum
acamera_metadata_enum_acamera_control_enable_zsl{
  ACAMERA_CONTROL_ENABLE_ZSL_FALSE = 0,
  ACAMERA_CONTROL_ENABLE_ZSL_TRUE = 1
}
enum
acamera_metadata_enum_acamera_control_mode{
  ACAMERA_CONTROL_MODE_OFF = 0,
  ACAMERA_CONTROL_MODE_AUTO = 1,
  ACAMERA_CONTROL_MODE_USE_SCENE_MODE = 2,
  ACAMERA_CONTROL_MODE_OFF_KEEP_STATE = 3
}
enum
acamera_metadata_enum_acamera_control_scene_mode{
  ACAMERA_CONTROL_SCENE_MODE_DISABLED = 0,
  ACAMERA_CONTROL_SCENE_MODE_FACE_PRIORITY = 1,
  ACAMERA_CONTROL_SCENE_MODE_ACTION = 2,
  ACAMERA_CONTROL_SCENE_MODE_PORTRAIT = 3,
  ACAMERA_CONTROL_SCENE_MODE_LANDSCAPE = 4,
  ACAMERA_CONTROL_SCENE_MODE_NIGHT = 5,
  ACAMERA_CONTROL_SCENE_MODE_NIGHT_PORTRAIT = 6,
  ACAMERA_CONTROL_SCENE_MODE_THEATRE = 7,
  ACAMERA_CONTROL_SCENE_MODE_BEACH = 8,
  ACAMERA_CONTROL_SCENE_MODE_SNOW = 9,
  ACAMERA_CONTROL_SCENE_MODE_SUNSET = 10,
  ACAMERA_CONTROL_SCENE_MODE_STEADYPHOTO = 11,
  ACAMERA_CONTROL_SCENE_MODE_FIREWORKS = 12,
  ACAMERA_CONTROL_SCENE_MODE_SPORTS = 13,
  ACAMERA_CONTROL_SCENE_MODE_PARTY = 14,
  ACAMERA_CONTROL_SCENE_MODE_CANDLELIGHT = 15,
  ACAMERA_CONTROL_SCENE_MODE_BARCODE = 16,
  ACAMERA_CONTROL_SCENE_MODE_HDR = 18
}
enum
acamera_metadata_enum_acamera_control_video_stabilization_mode{
  ACAMERA_CONTROL_VIDEO_STABILIZATION_MODE_OFF = 0,
  ACAMERA_CONTROL_VIDEO_STABILIZATION_MODE_ON = 1
}
enum
acamera_metadata_enum_acamera_depth_available_depth_stream_configurations{
  ACAMERA_DEPTH_AVAILABLE_DEPTH_STREAM_CONFIGURATIONS_OUTPUT = 0,
  ACAMERA_DEPTH_AVAILABLE_DEPTH_STREAM_CONFIGURATIONS_INPUT = 1
}
enum
acamera_metadata_enum_acamera_depth_depth_is_exclusive{
  ACAMERA_DEPTH_DEPTH_IS_EXCLUSIVE_FALSE = 0,
  ACAMERA_DEPTH_DEPTH_IS_EXCLUSIVE_TRUE = 1
}
enum
acamera_metadata_enum_acamera_distortion_correction_mode{
  ACAMERA_DISTORTION_CORRECTION_MODE_OFF = 0,
  ACAMERA_DISTORTION_CORRECTION_MODE_FAST = 1,
  ACAMERA_DISTORTION_CORRECTION_MODE_HIGH_QUALITY = 2
}
enum
acamera_metadata_enum_acamera_edge_mode{
  ACAMERA_EDGE_MODE_OFF = 0,
  ACAMERA_EDGE_MODE_FAST = 1,
  ACAMERA_EDGE_MODE_HIGH_QUALITY = 2,
  ACAMERA_EDGE_MODE_ZERO_SHUTTER_LAG = 3
}
enum
acamera_metadata_enum_acamera_flash_info_available{
  ACAMERA_FLASH_INFO_AVAILABLE_FALSE = 0,
  ACAMERA_FLASH_INFO_AVAILABLE_TRUE = 1
}
enum
acamera_metadata_enum_acamera_flash_mode{
  ACAMERA_FLASH_MODE_OFF = 0,
  ACAMERA_FLASH_MODE_SINGLE = 1,
  ACAMERA_FLASH_MODE_TORCH = 2
}
enum
acamera_metadata_enum_acamera_flash_state{
  ACAMERA_FLASH_STATE_UNAVAILABLE = 0,
  ACAMERA_FLASH_STATE_CHARGING = 1,
  ACAMERA_FLASH_STATE_READY = 2,
  ACAMERA_FLASH_STATE_FIRED = 3,
  ACAMERA_FLASH_STATE_PARTIAL = 4
}
enum
acamera_metadata_enum_acamera_hot_pixel_mode{
  ACAMERA_HOT_PIXEL_MODE_OFF = 0,
  ACAMERA_HOT_PIXEL_MODE_FAST = 1,
  ACAMERA_HOT_PIXEL_MODE_HIGH_QUALITY = 2
}
enum
acamera_metadata_enum_acamera_info_supported_hardware_level{
  ACAMERA_INFO_SUPPORTED_HARDWARE_LEVEL_LIMITED = 0,
  ACAMERA_INFO_SUPPORTED_HARDWARE_LEVEL_FULL = 1,
  ACAMERA_INFO_SUPPORTED_HARDWARE_LEVEL_LEGACY = 2,
  ACAMERA_INFO_SUPPORTED_HARDWARE_LEVEL_3 = 3,
  ACAMERA_INFO_SUPPORTED_HARDWARE_LEVEL_EXTERNAL = 4
}
enum
acamera_metadata_enum_acamera_lens_facing{
  ACAMERA_LENS_FACING_FRONT = 0,
  ACAMERA_LENS_FACING_BACK = 1,
  ACAMERA_LENS_FACING_EXTERNAL = 2
}
enum
acamera_metadata_enum_acamera_lens_info_focus_distance_calibration{
  ACAMERA_LENS_INFO_FOCUS_DISTANCE_CALIBRATION_UNCALIBRATED = 0,
  ACAMERA_LENS_INFO_FOCUS_DISTANCE_CALIBRATION_APPROXIMATE = 1,
  ACAMERA_LENS_INFO_FOCUS_DISTANCE_CALIBRATION_CALIBRATED = 2
}
enum
acamera_metadata_enum_acamera_lens_optical_stabilization_mode{
  ACAMERA_LENS_OPTICAL_STABILIZATION_MODE_OFF = 0,
  ACAMERA_LENS_OPTICAL_STABILIZATION_MODE_ON = 1
}
enum
acamera_metadata_enum_acamera_lens_pose_reference{
  ACAMERA_LENS_POSE_REFERENCE_PRIMARY_CAMERA = 0,
  ACAMERA_LENS_POSE_REFERENCE_GYROSCOPE = 1
}
enum
acamera_metadata_enum_acamera_lens_state{
  ACAMERA_LENS_STATE_STATIONARY = 0,
  ACAMERA_LENS_STATE_MOVING = 1
}
enum
acamera_metadata_enum_acamera_logical_multi_camera_sensor_sync_type{
  ACAMERA_LOGICAL_MULTI_CAMERA_SENSOR_SYNC_TYPE_APPROXIMATE = 0,
  ACAMERA_LOGICAL_MULTI_CAMERA_SENSOR_SYNC_TYPE_CALIBRATED = 1
}
enum
acamera_metadata_enum_acamera_noise_reduction_mode{
  ACAMERA_NOISE_REDUCTION_MODE_OFF = 0,
  ACAMERA_NOISE_REDUCTION_MODE_FAST = 1,
  ACAMERA_NOISE_REDUCTION_MODE_HIGH_QUALITY = 2,
  ACAMERA_NOISE_REDUCTION_MODE_MINIMAL = 3,
  ACAMERA_NOISE_REDUCTION_MODE_ZERO_SHUTTER_LAG = 4
}
enum
acamera_metadata_enum_acamera_request_available_capabilities{
  ACAMERA_REQUEST_AVAILABLE_CAPABILITIES_BACKWARD_COMPATIBLE = 0,
  ACAMERA_REQUEST_AVAILABLE_CAPABILITIES_MANUAL_SENSOR = 1,
  ACAMERA_REQUEST_AVAILABLE_CAPABILITIES_MANUAL_POST_PROCESSING = 2,
  ACAMERA_REQUEST_AVAILABLE_CAPABILITIES_RAW = 3,
  ACAMERA_REQUEST_AVAILABLE_CAPABILITIES_READ_SENSOR_SETTINGS = 5,
  ACAMERA_REQUEST_AVAILABLE_CAPABILITIES_BURST_CAPTURE = 6,
  ACAMERA_REQUEST_AVAILABLE_CAPABILITIES_DEPTH_OUTPUT = 8,
  ACAMERA_REQUEST_AVAILABLE_CAPABILITIES_MOTION_TRACKING = 10,
  ACAMERA_REQUEST_AVAILABLE_CAPABILITIES_LOGICAL_MULTI_CAMERA = 11,
  ACAMERA_REQUEST_AVAILABLE_CAPABILITIES_MONOCHROME = 12
}
enum
acamera_metadata_enum_acamera_scaler_available_stream_configurations{
  ACAMERA_SCALER_AVAILABLE_STREAM_CONFIGURATIONS_OUTPUT = 0,
  ACAMERA_SCALER_AVAILABLE_STREAM_CONFIGURATIONS_INPUT = 1
}
enum
acamera_metadata_enum_acamera_scaler_cropping_type{
  ACAMERA_SCALER_CROPPING_TYPE_CENTER_ONLY = 0,
  ACAMERA_SCALER_CROPPING_TYPE_FREEFORM = 1
}
enum
acamera_metadata_enum_acamera_sensor_info_color_filter_arrangement{
  ACAMERA_SENSOR_INFO_COLOR_FILTER_ARRANGEMENT_RGGB = 0,
  ACAMERA_SENSOR_INFO_COLOR_FILTER_ARRANGEMENT_GRBG = 1,
  ACAMERA_SENSOR_INFO_COLOR_FILTER_ARRANGEMENT_GBRG = 2,
  ACAMERA_SENSOR_INFO_COLOR_FILTER_ARRANGEMENT_BGGR = 3,
  ACAMERA_SENSOR_INFO_COLOR_FILTER_ARRANGEMENT_RGB = 4
}
enum
acamera_metadata_enum_acamera_sensor_info_lens_shading_applied{
  ACAMERA_SENSOR_INFO_LENS_SHADING_APPLIED_FALSE = 0,
  ACAMERA_SENSOR_INFO_LENS_SHADING_APPLIED_TRUE = 1
}
enum
acamera_metadata_enum_acamera_sensor_info_timestamp_source{
  ACAMERA_SENSOR_INFO_TIMESTAMP_SOURCE_UNKNOWN = 0,
  ACAMERA_SENSOR_INFO_TIMESTAMP_SOURCE_REALTIME = 1
}
enum
acamera_metadata_enum_acamera_sensor_reference_illuminant1{
  ACAMERA_SENSOR_REFERENCE_ILLUMINANT1_DAYLIGHT = 1,
  ACAMERA_SENSOR_REFERENCE_ILLUMINANT1_FLUORESCENT = 2,
  ACAMERA_SENSOR_REFERENCE_ILLUMINANT1_TUNGSTEN = 3,
  ACAMERA_SENSOR_REFERENCE_ILLUMINANT1_FLASH = 4,
  ACAMERA_SENSOR_REFERENCE_ILLUMINANT1_FINE_WEATHER = 9,
  ACAMERA_SENSOR_REFERENCE_ILLUMINANT1_CLOUDY_WEATHER = 10,
  ACAMERA_SENSOR_REFERENCE_ILLUMINANT1_SHADE = 11,
  ACAMERA_SENSOR_REFERENCE_ILLUMINANT1_DAYLIGHT_FLUORESCENT = 12,
  ACAMERA_SENSOR_REFERENCE_ILLUMINANT1_DAY_WHITE_FLUORESCENT = 13,
  ACAMERA_SENSOR_REFERENCE_ILLUMINANT1_COOL_WHITE_FLUORESCENT = 14,
  ACAMERA_SENSOR_REFERENCE_ILLUMINANT1_WHITE_FLUORESCENT = 15,
  ACAMERA_SENSOR_REFERENCE_ILLUMINANT1_STANDARD_A = 17,
  ACAMERA_SENSOR_REFERENCE_ILLUMINANT1_STANDARD_B = 18,
  ACAMERA_SENSOR_REFERENCE_ILLUMINANT1_STANDARD_C = 19,
  ACAMERA_SENSOR_REFERENCE_ILLUMINANT1_D55 = 20,
  ACAMERA_SENSOR_REFERENCE_ILLUMINANT1_D65 = 21,
  ACAMERA_SENSOR_REFERENCE_ILLUMINANT1_D75 = 22,
  ACAMERA_SENSOR_REFERENCE_ILLUMINANT1_D50 = 23,
  ACAMERA_SENSOR_REFERENCE_ILLUMINANT1_ISO_STUDIO_TUNGSTEN = 24
}
enum
acamera_metadata_enum_acamera_sensor_test_pattern_mode{
  ACAMERA_SENSOR_TEST_PATTERN_MODE_OFF = 0,
  ACAMERA_SENSOR_TEST_PATTERN_MODE_SOLID_COLOR = 1,
  ACAMERA_SENSOR_TEST_PATTERN_MODE_COLOR_BARS = 2,
  ACAMERA_SENSOR_TEST_PATTERN_MODE_COLOR_BARS_FADE_TO_GRAY = 3,
  ACAMERA_SENSOR_TEST_PATTERN_MODE_PN9 = 4,
  ACAMERA_SENSOR_TEST_PATTERN_MODE_CUSTOM1 = 256
}
enum
acamera_metadata_enum_acamera_shading_mode{
  ACAMERA_SHADING_MODE_OFF = 0,
  ACAMERA_SHADING_MODE_FAST = 1,
  ACAMERA_SHADING_MODE_HIGH_QUALITY = 2
}
enum
acamera_metadata_enum_acamera_statistics_face_detect_mode{
  ACAMERA_STATISTICS_FACE_DETECT_MODE_OFF = 0,
  ACAMERA_STATISTICS_FACE_DETECT_MODE_SIMPLE = 1,
  ACAMERA_STATISTICS_FACE_DETECT_MODE_FULL = 2
}
enum
acamera_metadata_enum_acamera_statistics_hot_pixel_map_mode{
  ACAMERA_STATISTICS_HOT_PIXEL_MAP_MODE_OFF = 0,
  ACAMERA_STATISTICS_HOT_PIXEL_MAP_MODE_ON = 1
}
enum
acamera_metadata_enum_acamera_statistics_lens_shading_map_mode{
  ACAMERA_STATISTICS_LENS_SHADING_MAP_MODE_OFF = 0,
  ACAMERA_STATISTICS_LENS_SHADING_MAP_MODE_ON = 1
}
enum
acamera_metadata_enum_acamera_statistics_ois_data_mode{
  ACAMERA_STATISTICS_OIS_DATA_MODE_OFF = 0,
  ACAMERA_STATISTICS_OIS_DATA_MODE_ON = 1
}
enum
acamera_metadata_enum_acamera_statistics_scene_flicker{
  ACAMERA_STATISTICS_SCENE_FLICKER_NONE = 0,
  ACAMERA_STATISTICS_SCENE_FLICKER_50HZ = 1,
  ACAMERA_STATISTICS_SCENE_FLICKER_60HZ = 2
}
enum
acamera_metadata_enum_acamera_sync_frame_number{
  ACAMERA_SYNC_FRAME_NUMBER_CONVERGING = -1,
  ACAMERA_SYNC_FRAME_NUMBER_UNKNOWN = -2
}
enum
acamera_metadata_enum_acamera_sync_max_latency{
  ACAMERA_SYNC_MAX_LATENCY_PER_FRAME_CONTROL = 0,
  ACAMERA_SYNC_MAX_LATENCY_UNKNOWN = -1
}
enum
acamera_metadata_enum_acamera_tonemap_mode{
  ACAMERA_TONEMAP_MODE_CONTRAST_CURVE = 0,
  ACAMERA_TONEMAP_MODE_FAST = 1,
  ACAMERA_TONEMAP_MODE_HIGH_QUALITY = 2,
  ACAMERA_TONEMAP_MODE_GAMMA_VALUE = 3,
  ACAMERA_TONEMAP_MODE_PRESET_CURVE = 4
}
enum
acamera_metadata_enum_acamera_tonemap_preset_curve{
  ACAMERA_TONEMAP_PRESET_CURVE_SRGB = 0,
  ACAMERA_TONEMAP_PRESET_CURVE_REC709 = 1
}
enum
acamera_metadata_section{
  ACAMERA_COLOR_CORRECTION,
  ACAMERA_CONTROL,
  ACAMERA_DEMOSAIC,
  ACAMERA_EDGE,
  ACAMERA_FLASH,
  ACAMERA_FLASH_INFO,
  ACAMERA_HOT_PIXEL,
  ACAMERA_JPEG,
  ACAMERA_LENS,
  ACAMERA_LENS_INFO,
  ACAMERA_NOISE_REDUCTION,
  ACAMERA_QUIRKS,
  ACAMERA_REQUEST,
  ACAMERA_SCALER,
  ACAMERA_SENSOR,
  ACAMERA_SENSOR_INFO,
  ACAMERA_SHADING,
  ACAMERA_STATISTICS,
  ACAMERA_STATISTICS_INFO,
  ACAMERA_TONEMAP,
  ACAMERA_LED,
  ACAMERA_INFO,
  ACAMERA_BLACK_LEVEL,
  ACAMERA_SYNC,
  ACAMERA_REPROCESS,
  ACAMERA_DEPTH,
  ACAMERA_LOGICAL_MULTI_CAMERA,
  ACAMERA_DISTORTION_CORRECTION,
  ACAMERA_SECTION_COUNT,
  ACAMERA_VENDOR = 0x8000
}
enum
acamera_metadata_section_start{
  ACAMERA_COLOR_CORRECTION_START = ACAMERA_COLOR_CORRECTION << 16,
  ACAMERA_CONTROL_START = ACAMERA_CONTROL << 16,
  ACAMERA_DEMOSAIC_START = ACAMERA_DEMOSAIC << 16,
  ACAMERA_EDGE_START = ACAMERA_EDGE << 16,
  ACAMERA_FLASH_START = ACAMERA_FLASH << 16,
  ACAMERA_FLASH_INFO_START = ACAMERA_FLASH_INFO << 16,
  ACAMERA_HOT_PIXEL_START = ACAMERA_HOT_PIXEL << 16,
  ACAMERA_JPEG_START = ACAMERA_JPEG << 16,
  ACAMERA_LENS_START = ACAMERA_LENS << 16,
  ACAMERA_LENS_INFO_START = ACAMERA_LENS_INFO << 16,
  ACAMERA_NOISE_REDUCTION_START = ACAMERA_NOISE_REDUCTION << 16,
  ACAMERA_QUIRKS_START = ACAMERA_QUIRKS << 16,
  ACAMERA_REQUEST_START = ACAMERA_REQUEST << 16,
  ACAMERA_SCALER_START = ACAMERA_SCALER << 16,
  ACAMERA_SENSOR_START = ACAMERA_SENSOR << 16,
  ACAMERA_SENSOR_INFO_START = ACAMERA_SENSOR_INFO << 16,
  ACAMERA_SHADING_START = ACAMERA_SHADING << 16,
  ACAMERA_STATISTICS_START = ACAMERA_STATISTICS << 16,
  ACAMERA_STATISTICS_INFO_START = ACAMERA_STATISTICS_INFO << 16,
  ACAMERA_TONEMAP_START = ACAMERA_TONEMAP << 16,
  ACAMERA_LED_START = ACAMERA_LED << 16,
  ACAMERA_INFO_START = ACAMERA_INFO << 16,
  ACAMERA_BLACK_LEVEL_START = ACAMERA_BLACK_LEVEL << 16,
  ACAMERA_SYNC_START = ACAMERA_SYNC << 16,
  ACAMERA_REPROCESS_START = ACAMERA_REPROCESS << 16,
  ACAMERA_DEPTH_START = ACAMERA_DEPTH << 16,
  ACAMERA_LOGICAL_MULTI_CAMERA_START = ACAMERA_LOGICAL_MULTI_CAMERA << 16,
  ACAMERA_DISTORTION_CORRECTION_START = ACAMERA_DISTORTION_CORRECTION << 16,
  ACAMERA_VENDOR_START = ACAMERA_VENDOR << 16
}
enum
Hierarchy positions in enum space.
acamera_metadata_tag{
  ACAMERA_COLOR_CORRECTION_MODE = ACAMERA_COLOR_CORRECTION_START,
  ACAMERA_COLOR_CORRECTION_TRANSFORM = ACAMERA_COLOR_CORRECTION_START + 1,
  ACAMERA_COLOR_CORRECTION_GAINS = ACAMERA_COLOR_CORRECTION_START + 2,
  ACAMERA_COLOR_CORRECTION_ABERRATION_MODE = ACAMERA_COLOR_CORRECTION_START + 3,
  ACAMERA_COLOR_CORRECTION_AVAILABLE_ABERRATION_MODES = ACAMERA_COLOR_CORRECTION_START + 4,
  ACAMERA_COLOR_CORRECTION_END,
  ACAMERA_CONTROL_AE_ANTIBANDING_MODE = ACAMERA_CONTROL_START,
  ACAMERA_CONTROL_AE_EXPOSURE_COMPENSATION = ACAMERA_CONTROL_START + 1,
  ACAMERA_CONTROL_AE_LOCK = ACAMERA_CONTROL_START + 2,
  ACAMERA_CONTROL_AE_MODE = ACAMERA_CONTROL_START + 3,
  ACAMERA_CONTROL_AE_REGIONS = ACAMERA_CONTROL_START + 4,
  ACAMERA_CONTROL_AE_TARGET_FPS_RANGE = ACAMERA_CONTROL_START + 5,
  ACAMERA_CONTROL_AE_PRECAPTURE_TRIGGER = ACAMERA_CONTROL_START + 6,
  ACAMERA_CONTROL_AF_MODE = ACAMERA_CONTROL_START + 7,
  ACAMERA_CONTROL_AF_REGIONS = ACAMERA_CONTROL_START + 8,
  ACAMERA_CONTROL_AF_TRIGGER = ACAMERA_CONTROL_START + 9,
  ACAMERA_CONTROL_AWB_LOCK = ACAMERA_CONTROL_START + 10,
  ACAMERA_CONTROL_AWB_MODE = ACAMERA_CONTROL_START + 11,
  ACAMERA_CONTROL_AWB_REGIONS = ACAMERA_CONTROL_START + 12,
  ACAMERA_CONTROL_CAPTURE_INTENT = ACAMERA_CONTROL_START + 13,
  ACAMERA_CONTROL_EFFECT_MODE = ACAMERA_CONTROL_START + 14,
  ACAMERA_CONTROL_MODE = ACAMERA_CONTROL_START + 15,
  ACAMERA_CONTROL_SCENE_MODE = ACAMERA_CONTROL_START + 16,
  ACAMERA_CONTROL_VIDEO_STABILIZATION_MODE = ACAMERA_CONTROL_START + 17,
  ACAMERA_CONTROL_AE_AVAILABLE_ANTIBANDING_MODES = ACAMERA_CONTROL_START + 18,
  ACAMERA_CONTROL_AE_AVAILABLE_MODES = ACAMERA_CONTROL_START + 19,
  ACAMERA_CONTROL_AE_AVAILABLE_TARGET_FPS_RANGES = ACAMERA_CONTROL_START + 20,
  ACAMERA_CONTROL_AE_COMPENSATION_RANGE = ACAMERA_CONTROL_START + 21,
  ACAMERA_CONTROL_AE_COMPENSATION_STEP = ACAMERA_CONTROL_START + 22,
  ACAMERA_CONTROL_AF_AVAILABLE_MODES = ACAMERA_CONTROL_START + 23,
  ACAMERA_CONTROL_AVAILABLE_EFFECTS = ACAMERA_CONTROL_START + 24,
  ACAMERA_CONTROL_AVAILABLE_SCENE_MODES = ACAMERA_CONTROL_START + 25,
  ACAMERA_CONTROL_AVAILABLE_VIDEO_STABILIZATION_MODES = ACAMERA_CONTROL_START + 26,
  ACAMERA_CONTROL_AWB_AVAILABLE_MODES = ACAMERA_CONTROL_START + 27,
  ACAMERA_CONTROL_MAX_REGIONS = ACAMERA_CONTROL_START + 28,
  ACAMERA_CONTROL_AE_STATE = ACAMERA_CONTROL_START + 31,
  ACAMERA_CONTROL_AF_STATE = ACAMERA_CONTROL_START + 32,
  ACAMERA_CONTROL_AWB_STATE = ACAMERA_CONTROL_START + 34,
  ACAMERA_CONTROL_AE_LOCK_AVAILABLE = ACAMERA_CONTROL_START + 36,
  ACAMERA_CONTROL_AWB_LOCK_AVAILABLE = ACAMERA_CONTROL_START + 37,
  ACAMERA_CONTROL_AVAILABLE_MODES = ACAMERA_CONTROL_START + 38,
  ACAMERA_CONTROL_POST_RAW_SENSITIVITY_BOOST_RANGE = ACAMERA_CONTROL_START + 39,
  ACAMERA_CONTROL_POST_RAW_SENSITIVITY_BOOST = ACAMERA_CONTROL_START + 40,
  ACAMERA_CONTROL_ENABLE_ZSL = ACAMERA_CONTROL_START + 41,
  ACAMERA_CONTROL_AF_SCENE_CHANGE = ACAMERA_CONTROL_START + 42,
  ACAMERA_CONTROL_END,
  ACAMERA_EDGE_MODE = ACAMERA_EDGE_START,
  ACAMERA_EDGE_AVAILABLE_EDGE_MODES = ACAMERA_EDGE_START + 2,
  ACAMERA_EDGE_END,
  ACAMERA_FLASH_MODE = ACAMERA_FLASH_START + 2,
  ACAMERA_FLASH_STATE = ACAMERA_FLASH_START + 5,
  ACAMERA_FLASH_END,
  ACAMERA_FLASH_INFO_AVAILABLE = ACAMERA_FLASH_INFO_START,
  ACAMERA_FLASH_INFO_END,
  ACAMERA_HOT_PIXEL_MODE = ACAMERA_HOT_PIXEL_START,
  ACAMERA_HOT_PIXEL_AVAILABLE_HOT_PIXEL_MODES = ACAMERA_HOT_PIXEL_START + 1,
  ACAMERA_HOT_PIXEL_END,
  ACAMERA_JPEG_GPS_COORDINATES = ACAMERA_JPEG_START,
  ACAMERA_JPEG_GPS_PROCESSING_METHOD = ACAMERA_JPEG_START + 1,
  ACAMERA_JPEG_GPS_TIMESTAMP = ACAMERA_JPEG_START + 2,
  ACAMERA_JPEG_ORIENTATION = ACAMERA_JPEG_START + 3,
  ACAMERA_JPEG_QUALITY = ACAMERA_JPEG_START + 4,
  ACAMERA_JPEG_THUMBNAIL_QUALITY = ACAMERA_JPEG_START + 5,
  ACAMERA_JPEG_THUMBNAIL_SIZE = ACAMERA_JPEG_START + 6,
  ACAMERA_JPEG_AVAILABLE_THUMBNAIL_SIZES = ACAMERA_JPEG_START + 7,
  ACAMERA_JPEG_END,
  ACAMERA_LENS_APERTURE = ACAMERA_LENS_START,
  ACAMERA_LENS_FILTER_DENSITY = ACAMERA_LENS_START + 1,
  ACAMERA_LENS_FOCAL_LENGTH = ACAMERA_LENS_START + 2,
  ACAMERA_LENS_FOCUS_DISTANCE = ACAMERA_LENS_START + 3,
  ACAMERA_LENS_OPTICAL_STABILIZATION_MODE = ACAMERA_LENS_START + 4,
  ACAMERA_LENS_FACING = ACAMERA_LENS_START + 5,
  ACAMERA_LENS_POSE_ROTATION = ACAMERA_LENS_START + 6,
  ACAMERA_LENS_POSE_TRANSLATION = ACAMERA_LENS_START + 7,
  ACAMERA_LENS_FOCUS_RANGE = ACAMERA_LENS_START + 8,
  ACAMERA_LENS_STATE = ACAMERA_LENS_START + 9,
  ACAMERA_LENS_INTRINSIC_CALIBRATION = ACAMERA_LENS_START + 10,
  ACAMERA_LENS_RADIAL_DISTORTION = ACAMERA_LENS_START + 11,
  ACAMERA_LENS_POSE_REFERENCE = ACAMERA_LENS_START + 12,
  ACAMERA_LENS_DISTORTION = ACAMERA_LENS_START + 13,
  ACAMERA_LENS_END,
  ACAMERA_LENS_INFO_AVAILABLE_APERTURES = ACAMERA_LENS_INFO_START,
  ACAMERA_LENS_INFO_AVAILABLE_FILTER_DENSITIES = ACAMERA_LENS_INFO_START + 1,
  ACAMERA_LENS_INFO_AVAILABLE_FOCAL_LENGTHS = ACAMERA_LENS_INFO_START + 2,
  ACAMERA_LENS_INFO_AVAILABLE_OPTICAL_STABILIZATION = ACAMERA_LENS_INFO_START + 3,
  ACAMERA_LENS_INFO_HYPERFOCAL_DISTANCE = ACAMERA_LENS_INFO_START + 4,
  ACAMERA_LENS_INFO_MINIMUM_FOCUS_DISTANCE = ACAMERA_LENS_INFO_START + 5,
  ACAMERA_LENS_INFO_SHADING_MAP_SIZE = ACAMERA_LENS_INFO_START + 6,
  ACAMERA_LENS_INFO_FOCUS_DISTANCE_CALIBRATION = ACAMERA_LENS_INFO_START + 7,
  ACAMERA_LENS_INFO_END,
  ACAMERA_NOISE_REDUCTION_MODE = ACAMERA_NOISE_REDUCTION_START,
  ACAMERA_NOISE_REDUCTION_AVAILABLE_NOISE_REDUCTION_MODES = ACAMERA_NOISE_REDUCTION_START + 2,
  ACAMERA_NOISE_REDUCTION_END,
  ACAMERA_REQUEST_MAX_NUM_OUTPUT_STREAMS = ACAMERA_REQUEST_START + 6,
  ACAMERA_REQUEST_PIPELINE_DEPTH = ACAMERA_REQUEST_START + 9,
  ACAMERA_REQUEST_PIPELINE_MAX_DEPTH = ACAMERA_REQUEST_START + 10,
  ACAMERA_REQUEST_PARTIAL_RESULT_COUNT = ACAMERA_REQUEST_START + 11,
  ACAMERA_REQUEST_AVAILABLE_CAPABILITIES = ACAMERA_REQUEST_START + 12,
  ACAMERA_REQUEST_AVAILABLE_REQUEST_KEYS = ACAMERA_REQUEST_START + 13,
  ACAMERA_REQUEST_AVAILABLE_RESULT_KEYS = ACAMERA_REQUEST_START + 14,
  ACAMERA_REQUEST_AVAILABLE_CHARACTERISTICS_KEYS = ACAMERA_REQUEST_START + 15,
  ACAMERA_REQUEST_AVAILABLE_SESSION_KEYS = ACAMERA_REQUEST_START + 16,
  ACAMERA_REQUEST_END,
  ACAMERA_SCALER_CROP_REGION = ACAMERA_SCALER_START,
  ACAMERA_SCALER_AVAILABLE_MAX_DIGITAL_ZOOM = ACAMERA_SCALER_START + 4,
  ACAMERA_SCALER_AVAILABLE_STREAM_CONFIGURATIONS = ACAMERA_SCALER_START + 10,
  ACAMERA_SCALER_AVAILABLE_MIN_FRAME_DURATIONS = ACAMERA_SCALER_START + 11,
  ACAMERA_SCALER_AVAILABLE_STALL_DURATIONS = ACAMERA_SCALER_START + 12,
  ACAMERA_SCALER_CROPPING_TYPE = ACAMERA_SCALER_START + 13,
  ACAMERA_SCALER_END,
  ACAMERA_SENSOR_EXPOSURE_TIME = ACAMERA_SENSOR_START,
  ACAMERA_SENSOR_FRAME_DURATION = ACAMERA_SENSOR_START + 1,
  ACAMERA_SENSOR_SENSITIVITY = ACAMERA_SENSOR_START + 2,
  ACAMERA_SENSOR_REFERENCE_ILLUMINANT1 = ACAMERA_SENSOR_START + 3,
  ACAMERA_SENSOR_REFERENCE_ILLUMINANT2 = ACAMERA_SENSOR_START + 4,
  ACAMERA_SENSOR_CALIBRATION_TRANSFORM1 = ACAMERA_SENSOR_START + 5,
  ACAMERA_SENSOR_CALIBRATION_TRANSFORM2 = ACAMERA_SENSOR_START + 6,
  ACAMERA_SENSOR_COLOR_TRANSFORM1 = ACAMERA_SENSOR_START + 7,
  ACAMERA_SENSOR_COLOR_TRANSFORM2 = ACAMERA_SENSOR_START + 8,
  ACAMERA_SENSOR_FORWARD_MATRIX1 = ACAMERA_SENSOR_START + 9,
  ACAMERA_SENSOR_FORWARD_MATRIX2 = ACAMERA_SENSOR_START + 10,
  ACAMERA_SENSOR_BLACK_LEVEL_PATTERN = ACAMERA_SENSOR_START + 12,
  ACAMERA_SENSOR_MAX_ANALOG_SENSITIVITY = ACAMERA_SENSOR_START + 13,
  ACAMERA_SENSOR_ORIENTATION = ACAMERA_SENSOR_START + 14,
  ACAMERA_SENSOR_TIMESTAMP = ACAMERA_SENSOR_START + 16,
  ACAMERA_SENSOR_NEUTRAL_COLOR_POINT = ACAMERA_SENSOR_START + 18,
  ACAMERA_SENSOR_NOISE_PROFILE = ACAMERA_SENSOR_START + 19,
  ACAMERA_SENSOR_GREEN_SPLIT = ACAMERA_SENSOR_START + 22,
  ACAMERA_SENSOR_TEST_PATTERN_DATA = ACAMERA_SENSOR_START + 23,
  ACAMERA_SENSOR_TEST_PATTERN_MODE = ACAMERA_SENSOR_START + 24,
  ACAMERA_SENSOR_AVAILABLE_TEST_PATTERN_MODES = ACAMERA_SENSOR_START + 25,
  ACAMERA_SENSOR_ROLLING_SHUTTER_SKEW = ACAMERA_SENSOR_START + 26,
  ACAMERA_SENSOR_OPTICAL_BLACK_REGIONS = ACAMERA_SENSOR_START + 27,
  ACAMERA_SENSOR_DYNAMIC_BLACK_LEVEL = ACAMERA_SENSOR_START + 28,
  ACAMERA_SENSOR_DYNAMIC_WHITE_LEVEL = ACAMERA_SENSOR_START + 29,
  ACAMERA_SENSOR_END,
  ACAMERA_SENSOR_INFO_ACTIVE_ARRAY_SIZE = ACAMERA_SENSOR_INFO_START,
  ACAMERA_SENSOR_INFO_SENSITIVITY_RANGE = ACAMERA_SENSOR_INFO_START + 1,
  ACAMERA_SENSOR_INFO_COLOR_FILTER_ARRANGEMENT = ACAMERA_SENSOR_INFO_START + 2,
  ACAMERA_SENSOR_INFO_EXPOSURE_TIME_RANGE = ACAMERA_SENSOR_INFO_START + 3,
  ACAMERA_SENSOR_INFO_MAX_FRAME_DURATION = ACAMERA_SENSOR_INFO_START + 4,
  ACAMERA_SENSOR_INFO_PHYSICAL_SIZE = ACAMERA_SENSOR_INFO_START + 5,
  ACAMERA_SENSOR_INFO_PIXEL_ARRAY_SIZE = ACAMERA_SENSOR_INFO_START + 6,
  ACAMERA_SENSOR_INFO_WHITE_LEVEL = ACAMERA_SENSOR_INFO_START + 7,
  ACAMERA_SENSOR_INFO_TIMESTAMP_SOURCE = ACAMERA_SENSOR_INFO_START + 8,
  ACAMERA_SENSOR_INFO_LENS_SHADING_APPLIED = ACAMERA_SENSOR_INFO_START + 9,
  ACAMERA_SENSOR_INFO_PRE_CORRECTION_ACTIVE_ARRAY_SIZE = ACAMERA_SENSOR_INFO_START + 10,
  ACAMERA_SENSOR_INFO_END,
  ACAMERA_SHADING_MODE = ACAMERA_SHADING_START,
  ACAMERA_SHADING_AVAILABLE_MODES = ACAMERA_SHADING_START + 2,
  ACAMERA_SHADING_END,
  ACAMERA_STATISTICS_FACE_DETECT_MODE = ACAMERA_STATISTICS_START,
  ACAMERA_STATISTICS_HOT_PIXEL_MAP_MODE = ACAMERA_STATISTICS_START + 3,
  ACAMERA_STATISTICS_FACE_IDS = ACAMERA_STATISTICS_START + 4,
  ACAMERA_STATISTICS_FACE_LANDMARKS = ACAMERA_STATISTICS_START + 5,
  ACAMERA_STATISTICS_FACE_RECTANGLES = ACAMERA_STATISTICS_START + 6,
  ACAMERA_STATISTICS_FACE_SCORES = ACAMERA_STATISTICS_START + 7,
  ACAMERA_STATISTICS_LENS_SHADING_MAP = ACAMERA_STATISTICS_START + 11,
  ACAMERA_STATISTICS_SCENE_FLICKER = ACAMERA_STATISTICS_START + 14,
  ACAMERA_STATISTICS_HOT_PIXEL_MAP = ACAMERA_STATISTICS_START + 15,
  ACAMERA_STATISTICS_LENS_SHADING_MAP_MODE = ACAMERA_STATISTICS_START + 16,
  ACAMERA_STATISTICS_OIS_DATA_MODE = ACAMERA_STATISTICS_START + 17,
  ACAMERA_STATISTICS_OIS_TIMESTAMPS = ACAMERA_STATISTICS_START + 18,
  ACAMERA_STATISTICS_OIS_X_SHIFTS = ACAMERA_STATISTICS_START + 19,
  ACAMERA_STATISTICS_OIS_Y_SHIFTS = ACAMERA_STATISTICS_START + 20,
  ACAMERA_STATISTICS_END,
  ACAMERA_STATISTICS_INFO_AVAILABLE_FACE_DETECT_MODES = ACAMERA_STATISTICS_INFO_START,
  ACAMERA_STATISTICS_INFO_MAX_FACE_COUNT = ACAMERA_STATISTICS_INFO_START + 2,
  ACAMERA_STATISTICS_INFO_AVAILABLE_HOT_PIXEL_MAP_MODES = ACAMERA_STATISTICS_INFO_START + 6,
  ACAMERA_STATISTICS_INFO_AVAILABLE_LENS_SHADING_MAP_MODES = ACAMERA_STATISTICS_INFO_START + 7,
  ACAMERA_STATISTICS_INFO_AVAILABLE_OIS_DATA_MODES = ACAMERA_STATISTICS_INFO_START + 8,
  ACAMERA_STATISTICS_INFO_END,
  ACAMERA_TONEMAP_CURVE_BLUE = ACAMERA_TONEMAP_START,
  ACAMERA_TONEMAP_CURVE_GREEN = ACAMERA_TONEMAP_START + 1,
  ACAMERA_TONEMAP_CURVE_RED = ACAMERA_TONEMAP_START + 2,
  ACAMERA_TONEMAP_MODE = ACAMERA_TONEMAP_START + 3,
  ACAMERA_TONEMAP_MAX_CURVE_POINTS = ACAMERA_TONEMAP_START + 4,
  ACAMERA_TONEMAP_AVAILABLE_TONE_MAP_MODES = ACAMERA_TONEMAP_START + 5,
  ACAMERA_TONEMAP_GAMMA = ACAMERA_TONEMAP_START + 6,
  ACAMERA_TONEMAP_PRESET_CURVE = ACAMERA_TONEMAP_START + 7,
  ACAMERA_TONEMAP_END,
  ACAMERA_INFO_SUPPORTED_HARDWARE_LEVEL = ACAMERA_INFO_START,
  ACAMERA_INFO_VERSION = ACAMERA_INFO_START + 1,
  ACAMERA_INFO_END,
  ACAMERA_BLACK_LEVEL_LOCK = ACAMERA_BLACK_LEVEL_START,
  ACAMERA_BLACK_LEVEL_END,
  ACAMERA_SYNC_FRAME_NUMBER = ACAMERA_SYNC_START,
  ACAMERA_SYNC_MAX_LATENCY = ACAMERA_SYNC_START + 1,
  ACAMERA_SYNC_END,
  ACAMERA_DEPTH_AVAILABLE_DEPTH_STREAM_CONFIGURATIONS = ACAMERA_DEPTH_START + 1,
  ACAMERA_DEPTH_AVAILABLE_DEPTH_MIN_FRAME_DURATIONS = ACAMERA_DEPTH_START + 2,
  ACAMERA_DEPTH_AVAILABLE_DEPTH_STALL_DURATIONS = ACAMERA_DEPTH_START + 3,
  ACAMERA_DEPTH_DEPTH_IS_EXCLUSIVE = ACAMERA_DEPTH_START + 4,
  ACAMERA_DEPTH_END,
  ACAMERA_LOGICAL_MULTI_CAMERA_SENSOR_SYNC_TYPE = ACAMERA_LOGICAL_MULTI_CAMERA_START + 1,
  ACAMERA_LOGICAL_MULTI_CAMERA_END,
  ACAMERA_DISTORTION_CORRECTION_MODE = ACAMERA_DISTORTION_CORRECTION_START,
  ACAMERA_DISTORTION_CORRECTION_AVAILABLE_MODES = ACAMERA_DISTORTION_CORRECTION_START + 1,
  ACAMERA_DISTORTION_CORRECTION_END
}
enum
Main enum for camera metadata tags.
camera_status_t{
  ACAMERA_OK = 0,
  ACAMERA_ERROR_BASE = -10000,
  ACAMERA_ERROR_UNKNOWN = ACAMERA_ERROR_BASE,
  ACAMERA_ERROR_INVALID_PARAMETER = ACAMERA_ERROR_BASE - 1,
  ACAMERA_ERROR_CAMERA_DISCONNECTED = ACAMERA_ERROR_BASE - 2,
  ACAMERA_ERROR_NOT_ENOUGH_MEMORY = ACAMERA_ERROR_BASE - 3,
  ACAMERA_ERROR_METADATA_NOT_FOUND = ACAMERA_ERROR_BASE - 4,
  ACAMERA_ERROR_CAMERA_DEVICE = ACAMERA_ERROR_BASE - 5,
  ACAMERA_ERROR_CAMERA_SERVICE = ACAMERA_ERROR_BASE - 6,
  ACAMERA_ERROR_SESSION_CLOSED = ACAMERA_ERROR_BASE - 7,
  ACAMERA_ERROR_INVALID_OPERATION = ACAMERA_ERROR_BASE - 8,
  ACAMERA_ERROR_STREAM_CONFIGURE_FAIL = ACAMERA_ERROR_BASE - 9,
  ACAMERA_ERROR_CAMERA_IN_USE = ACAMERA_ERROR_BASE - 10,
  ACAMERA_ERROR_MAX_CAMERA_IN_USE = ACAMERA_ERROR_BASE - 11,
  ACAMERA_ERROR_CAMERA_DISABLED = ACAMERA_ERROR_BASE - 12,
  ACAMERA_ERROR_PERMISSION_DENIED = ACAMERA_ERROR_BASE - 13
}
enum

Typedefs

ACameraCaptureFailure typedef
Struct to describe a capture failure.
ACameraCaptureSession typedef
typedef__BEGIN_DECLS struct ACameraCaptureSession
ACameraCaptureSession is an opaque type that manages frame captures of a camera device.
ACameraCaptureSession_captureCallback_bufferLost)(void *context, ACameraCaptureSession *session, ACaptureRequest *request, ANativeWindow *window, int64_t frameNumber) typedef
void(*
The definition of camera buffer lost callback.
ACameraCaptureSession_captureCallback_failed)(void *context, ACameraCaptureSession *session, ACaptureRequest *request, ACameraCaptureFailure *failure) typedef
void(*
The definition of camera capture failure callback.
ACameraCaptureSession_captureCallback_result)(void *context, ACameraCaptureSession *session, ACaptureRequest *request, const ACameraMetadata *result) typedef
void(*
The definition of camera capture progress/result callback.
ACameraCaptureSession_captureCallback_sequenceAbort)(void *context, ACameraCaptureSession *session, int sequenceId) typedef
void(*
The definition of camera sequence aborted callback.
ACameraCaptureSession_captureCallback_sequenceEnd)(void *context, ACameraCaptureSession *session, int sequenceId, int64_t frameNumber) typedef
void(*
The definition of camera sequence end callback.
ACameraCaptureSession_captureCallback_start)(void *context, ACameraCaptureSession *session, const ACaptureRequest *request, int64_t timestamp) typedef
void(*
The definition of camera capture start callback.
ACameraCaptureSession_captureCallbacks typedef
ACameraCaptureSession_stateCallback)(void *context, ACameraCaptureSession *session) typedef
void(*
The definition of camera capture session state callback.
ACameraCaptureSession_stateCallbacks typedef
ACameraDevice typedef
struct ACameraDevice
ACameraDevice typedef
typedef__BEGIN_DECLS struct ACameraDevice
ACameraDevice is opaque type that provides access to a camera device.
ACameraDevice_ErrorStateCallback)(void *context, ACameraDevice *device, int error) typedef
void(*
Camera device error state callbacks to be used in ACameraDevice_StateCallbacks.
ACameraDevice_StateCallback)(void *context, ACameraDevice *device) typedef
void(*
Camera device state callbacks to be used in ACameraDevice_StateCallbacks.
ACameraDevice_StateCallbacks typedef
ACameraDevice_stateCallbacks typedef
For backward compatiblity.
ACameraIdList typedef
struct ACameraIdList
Struct to hold list of camera devices.
ACameraManager typedef
typedef__BEGIN_DECLS struct ACameraManager
ACameraManager is opaque type that provides access to camera service.
ACameraManager_AvailabilityCallback)(void *context, const char *cameraId) typedef
void(*
Definition of camera availability callbacks.
ACameraManager_AvailabilityCallbacks typedef
A listener for camera devices becoming available or unavailable to open.
ACameraMetadata typedef
typedef__BEGIN_DECLS struct ACameraMetadata
ACameraMetadata is opaque type that provides access to read-only camera metadata like camera characteristics (via ACameraManager_getCameraCharacteristics) or capture results (via ACameraCaptureSession_captureCallback_result).
ACameraMetadata_const_entry typedef
A single read-only camera metadata entry.
ACameraMetadata_entry typedef
A single camera metadata entry.
ACameraMetadata_rational typedef
Definition of rational data type in ACameraMetadata.
ACameraOutputTarget typedef
struct ACameraOutputTarget
ACameraOutputTargets typedef
typedef__BEGIN_DECLS struct ACameraOutputTargets
ACaptureRequest typedef
ACaptureRequest is an opaque type that contains settings and output targets needed to capture a single image from camera device.
ACaptureSessionOutput typedef
struct ACaptureSessionOutput
ACaptureSessionOutput typedef
struct ACaptureSessionOutput
ACaptureSessionOutputContainer typedef
struct ACaptureSessionOutputContainer
acamera_metadata_enum_android_black_level_lock_t typedef
enum acamera_metadata_enum_acamera_black_level_lock
acamera_metadata_enum_android_color_correction_aberration_mode_t typedef
acamera_metadata_enum_android_color_correction_mode_t typedef
Enumeration definitions for the various entries that need them.
acamera_metadata_enum_android_control_ae_antibanding_mode_t typedef
acamera_metadata_enum_android_control_ae_lock_available_t typedef
enum acamera_metadata_enum_acamera_control_ae_lock_available
acamera_metadata_enum_android_control_ae_lock_t typedef
acamera_metadata_enum_android_control_ae_mode_t typedef
acamera_metadata_enum_android_control_ae_precapture_trigger_t typedef
acamera_metadata_enum_android_control_ae_state_t typedef
acamera_metadata_enum_android_control_af_mode_t typedef
acamera_metadata_enum_android_control_af_scene_change_t typedef
acamera_metadata_enum_android_control_af_state_t typedef
acamera_metadata_enum_android_control_af_trigger_t typedef
acamera_metadata_enum_android_control_awb_lock_available_t typedef
enum acamera_metadata_enum_acamera_control_awb_lock_available
acamera_metadata_enum_android_control_awb_lock_t typedef
acamera_metadata_enum_android_control_awb_mode_t typedef
acamera_metadata_enum_android_control_awb_state_t typedef
acamera_metadata_enum_android_control_capture_intent_t typedef
acamera_metadata_enum_android_control_effect_mode_t typedef
acamera_metadata_enum_android_control_enable_zsl_t typedef
acamera_metadata_enum_android_control_mode_t typedef
acamera_metadata_enum_android_control_scene_mode_t typedef
acamera_metadata_enum_android_control_video_stabilization_mode_t typedef
acamera_metadata_enum_android_depth_available_depth_stream_configurations_t typedef
enum acamera_metadata_enum_acamera_depth_available_depth_stream_configurations
acamera_metadata_enum_android_depth_depth_is_exclusive_t typedef
enum acamera_metadata_enum_acamera_depth_depth_is_exclusive
acamera_metadata_enum_android_distortion_correction_mode_t typedef
acamera_metadata_enum_android_edge_mode_t typedef
acamera_metadata_enum_android_flash_info_available_t typedef
enum acamera_metadata_enum_acamera_flash_info_available
acamera_metadata_enum_android_flash_mode_t typedef
acamera_metadata_enum_android_flash_state_t typedef
acamera_metadata_enum_android_hot_pixel_mode_t typedef
acamera_metadata_enum_android_info_supported_hardware_level_t typedef
acamera_metadata_enum_android_lens_facing_t typedef
acamera_metadata_enum_android_lens_info_focus_distance_calibration_t typedef
acamera_metadata_enum_android_lens_optical_stabilization_mode_t typedef
acamera_metadata_enum_android_lens_pose_reference_t typedef
acamera_metadata_enum_android_lens_state_t typedef
acamera_metadata_enum_android_logical_multi_camera_sensor_sync_type_t typedef
acamera_metadata_enum_android_noise_reduction_mode_t typedef
acamera_metadata_enum_android_request_available_capabilities_t typedef
acamera_metadata_enum_android_scaler_available_stream_configurations_t typedef
enum acamera_metadata_enum_acamera_scaler_available_stream_configurations
acamera_metadata_enum_android_scaler_cropping_type_t typedef
acamera_metadata_enum_android_sensor_info_color_filter_arrangement_t typedef
acamera_metadata_enum_android_sensor_info_lens_shading_applied_t typedef
enum acamera_metadata_enum_acamera_sensor_info_lens_shading_applied
acamera_metadata_enum_android_sensor_info_timestamp_source_t typedef
acamera_metadata_enum_android_sensor_reference_illuminant1_t typedef
acamera_metadata_enum_android_sensor_test_pattern_mode_t typedef
acamera_metadata_enum_android_shading_mode_t typedef
acamera_metadata_enum_android_statistics_face_detect_mode_t typedef
acamera_metadata_enum_android_statistics_hot_pixel_map_mode_t typedef
acamera_metadata_enum_android_statistics_lens_shading_map_mode_t typedef
acamera_metadata_enum_android_statistics_ois_data_mode_t typedef
acamera_metadata_enum_android_statistics_scene_flicker_t typedef
acamera_metadata_enum_android_sync_frame_number_t typedef
acamera_metadata_enum_android_sync_max_latency_t typedef
acamera_metadata_enum_android_tonemap_mode_t typedef
acamera_metadata_enum_android_tonemap_preset_curve_t typedef
acamera_metadata_section_start_t typedef
Hierarchy positions in enum space.
acamera_metadata_section_t typedef
__BEGIN_DECLS enum acamera_metadata_section
acamera_metadata_tag_t typedef
Main enum for camera metadata tags.

Functions

ACameraCaptureSession_abortCaptures(ACameraCaptureSession *session)
Discard all captures currently pending and in-progress as fast as possible.
ACameraCaptureSession_capture(ACameraCaptureSession *session, ACameraCaptureSession_captureCallbacks *callbacks, int numRequests, ACaptureRequest **requests, int *captureSequenceId)
Submit an array of requests to be captured in sequence as a burst in the minimum of time possible.
ACameraCaptureSession_close(ACameraCaptureSession *session)
void
Close this capture session.
ACameraCaptureSession_getDevice(ACameraCaptureSession *session, ACameraDevice **device)
Get the ACameraDevice pointer associated with this capture session in the device argument if the method succeeds.
ACameraCaptureSession_setRepeatingRequest(ACameraCaptureSession *session, ACameraCaptureSession_captureCallbacks *callbacks, int numRequests, ACaptureRequest **requests, int *captureSequenceId)
Request endlessly repeating capture of a sequence of images by this capture session.
ACameraCaptureSession_stopRepeating(ACameraCaptureSession *session)
Cancel any ongoing repeating capture set by ACameraCaptureSession_setRepeatingRequest.
ACameraCaptureSession_updateSharedOutput(ACameraCaptureSession *session, ACaptureSessionOutput *output)
Update shared ACaptureSessionOutput.
ACameraDevice_close(ACameraDevice *device)
Close the connection and free this ACameraDevice synchronously.
ACameraDevice_createCaptureRequest(const ACameraDevice *device, ACameraDevice_request_template templateId, ACaptureRequest **request)
Create a ACaptureRequest for capturing images, initialized with template for a target use case.
ACameraDevice_createCaptureSession(ACameraDevice *device, const ACaptureSessionOutputContainer *outputs, const ACameraCaptureSession_stateCallbacks *callbacks, ACameraCaptureSession **session)
Create a new camera capture session by providing the target output set of ANativeWindow to the camera device.
ACameraDevice_createCaptureSessionWithSessionParameters(ACameraDevice *device, const ACaptureSessionOutputContainer *outputs, const ACaptureRequest *sessionParameters, const ACameraCaptureSession_stateCallbacks *callbacks, ACameraCaptureSession **session)
Create a new camera capture session similar to ACameraDevice_createCaptureSession.
ACameraDevice_getId(const ACameraDevice *device)
const char *
Return the camera id associated with this camera device.
ACameraManager_create()
Create ACameraManager instance.
ACameraManager_delete(ACameraManager *manager)
void
ACameraManager_deleteCameraIdList(ACameraIdList *cameraIdList)
void
Delete a list of camera devices allocated via ACameraManager_getCameraIdList.
ACameraManager_getCameraCharacteristics(ACameraManager *manager, const char *cameraId, ACameraMetadata **characteristics)
Query the capabilities of a camera device.
ACameraManager_getCameraIdList(ACameraManager *manager, ACameraIdList **cameraIdList)
Create a list of currently connected camera devices, including cameras that may be in use by other camera API clients.
ACameraManager_openCamera(ACameraManager *manager, const char *cameraId, ACameraDevice_StateCallbacks *callback, ACameraDevice **device)
Open a connection to a camera with the given ID.
ACameraManager_registerAvailabilityCallback(ACameraManager *manager, const ACameraManager_AvailabilityCallbacks *callback)
Register camera availability callbacks.
ACameraManager_unregisterAvailabilityCallback(ACameraManager *manager, const ACameraManager_AvailabilityCallbacks *callback)
Unregister camera availability callbacks.
ACameraMetadata_copy(const ACameraMetadata *src)
Create a copy of input ACameraMetadata.
ACameraMetadata_free(ACameraMetadata *metadata)
void
Free a ACameraMetadata structure.
ACameraMetadata_getAllTags(const ACameraMetadata *metadata, int32_t *numEntries, const uint32_t **tags)
List all the entry tags in input ACameraMetadata.
ACameraMetadata_getConstEntry(const ACameraMetadata *metadata, uint32_t tag, ACameraMetadata_const_entry *entry)
Get a metadata entry from an input ACameraMetadata.
ACameraOutputTarget_create(ANativeWindow *window, ACameraOutputTarget **output)
Create a ACameraOutputTarget object.
ACameraOutputTarget_free(ACameraOutputTarget *output)
void
Free a ACameraOutputTarget object.
ACaptureRequest_addTarget(ACaptureRequest *request, const ACameraOutputTarget *output)
ACaptureRequest_copy(const ACaptureRequest *src)
Create a copy of input ACaptureRequest.
ACaptureRequest_free(ACaptureRequest *request)
void
Free a ACaptureRequest structure.
ACaptureRequest_getAllTags(const ACaptureRequest *request, int32_t *numTags, const uint32_t **tags)
ACaptureRequest_getConstEntry(const ACaptureRequest *request, uint32_t tag, ACameraMetadata_const_entry *entry)
Get a metadata entry from input ACaptureRequest.
ACaptureRequest_getUserContext(const ACaptureRequest *request, void **context)
Get the user context pointer of the ACaptureRequest.
ACaptureRequest_removeTarget(ACaptureRequest *request, const ACameraOutputTarget *output)
Remove an ACameraOutputTarget object from ACaptureRequest.
ACaptureRequest_setEntry_double(ACaptureRequest *request, uint32_t tag, uint32_t count, const double *data)
Set/change a camera capture control entry with double data type.
ACaptureRequest_setEntry_float(ACaptureRequest *request, uint32_t tag, uint32_t count, const float *data)
Set/change a camera capture control entry with float data type.
ACaptureRequest_setEntry_i32(ACaptureRequest *request, uint32_t tag, uint32_t count, const int32_t *data)
Set/change a camera capture control entry with signed 32 bits data type.
ACaptureRequest_setEntry_i64(ACaptureRequest *request, uint32_t tag, uint32_t count, const int64_t *data)
Set/change a camera capture control entry with signed 64 bits data type.
ACaptureRequest_setEntry_rational(ACaptureRequest *request, uint32_t tag, uint32_t count, const ACameraMetadata_rational *data)
Set/change a camera capture control entry with rational data type.
ACaptureRequest_setEntry_u8(ACaptureRequest *request, uint32_t tag, uint32_t count, const uint8_t *data)
Set/change a camera capture control entry with unsigned 8 bits data type.
ACaptureRequest_setUserContext(ACaptureRequest *request, void *context)
Associate an arbitrary user context pointer to the ACaptureRequest.
ACaptureSessionOutputContainer_add(ACaptureSessionOutputContainer *container, const ACaptureSessionOutput *output)
ACaptureSessionOutputContainer_create(ACaptureSessionOutputContainer **container)
Create a capture session output container.
ACaptureSessionOutputContainer_free(ACaptureSessionOutputContainer *container)
void
Free a capture session output container.
ACaptureSessionOutputContainer_remove(ACaptureSessionOutputContainer *container, const ACaptureSessionOutput *output)
ACaptureSessionOutput_create(ANativeWindow *anw, ACaptureSessionOutput **output)
Create a ACaptureSessionOutput object.
ACaptureSessionOutput_free(ACaptureSessionOutput *output)
void
Free a ACaptureSessionOutput object.
ACaptureSessionSharedOutput_add(ACaptureSessionOutput *output, ANativeWindow *anw)
Add a native window to shared ACaptureSessionOutput.
ACaptureSessionSharedOutput_create(ANativeWindow *anw, ACaptureSessionOutput **output)
Create a shared ACaptureSessionOutput object.
ACaptureSessionSharedOutput_remove(ACaptureSessionOutput *output, ANativeWindow *anw)
Remove a native window from shared ACaptureSessionOutput.

Structs

ACameraCaptureFailure

Struct to describe a capture failure.

ACameraCaptureSession_captureCallbacks
ACameraCaptureSession_stateCallbacks
ACameraDevice_StateCallbacks
ACameraIdList

Struct to hold list of camera devices.

ACameraManager_AvailabilityListener

A listener for camera devices becoming available or unavailable to open.

ACameraMetadata_const_entry

A single read-only camera metadata entry.

ACameraMetadata_entry

A single camera metadata entry.

ACameraMetadata_rational

Definition of rational data type in ACameraMetadata.

Enumerations

Anonymous Enum 69

 Anonymous Enum 69

Enum for describing error reason in ACameraCaptureFailure.

Properties
CAPTURE_FAILURE_REASON_ERROR

The capture session has dropped this frame due to an error in the framework.

CAPTURE_FAILURE_REASON_FLUSHED

The capture session has dropped this frame due to an ACameraCaptureSession_abortCaptures call.

Anonymous Enum 70

 Anonymous Enum 70

Anonymous Enum 71

 Anonymous Enum 71

Enum for ACameraDevice_ErrorStateCallback error code.

Properties
ERROR_CAMERA_DEVICE

The camera device has encountered a fatal error.

The camera device needs to be re-opened to be used again.

ERROR_CAMERA_DISABLED

The camera is disabled due to a device policy, and cannot be opened.

ERROR_CAMERA_IN_USE

The camera device is in use already.

ERROR_CAMERA_SERVICE

The camera service has encountered a fatal error.

The Android device may need to be shut down and restarted to restore camera function, or there may be a persistent hardware problem. An attempt at recovery may be possible by closing the CameraDevice and the CameraManager, and trying to acquire all resources again from scratch.

ERROR_MAX_CAMERAS_IN_USE

The system-wide limit for number of open cameras or camera resources has been reached, and more camera devices cannot be opened until previous instances are closed.

Anonymous Enum 72

 Anonymous Enum 72

Possible data types of a metadata entry.

Keep in sync with system/media/include/system/camera_metadata.h

Properties
ACAMERA_NUM_TYPES

Number of type fields.

ACAMERA_TYPE_BYTE

Unsigned 8-bit integer (uint8_t)

ACAMERA_TYPE_DOUBLE

64-bit float (double)

ACAMERA_TYPE_FLOAT

32-bit float (float)

ACAMERA_TYPE_INT32

Signed 32-bit integer (int32_t)

ACAMERA_TYPE_INT64

Signed 64-bit integer (int64_t)

ACAMERA_TYPE_RATIONAL

A 64-bit fraction (ACameraMetadata_rational)

ACameraDevice_request_template

 ACameraDevice_request_template
Properties
TEMPLATE_MANUAL

A basic template for direct application control of capture parameters.

All automatic control is disabled (auto-exposure, auto-white balance, auto-focus), and post-processing parameters are set to preview quality. The manual capture parameters (exposure, sensitivity, and so on) are set to reasonable defaults, but should be overriden by the application depending on the intended use case. This template is guaranteed to be supported on camera devices that support the ACAMERA_REQUEST_AVAILABLE_CAPABILITIES_MANUAL_SENSOR capability.

See also: ACameraDevice_createCaptureRequest

TEMPLATE_PREVIEW

Create a request suitable for a camera preview window.

Specifically, this means that high frame rate is given priority over the highest-quality post-processing. These requests would normally be used with the ACameraCaptureSession_setRepeatingRequest method. This template is guaranteed to be supported on all camera devices.

See also: ACameraDevice_createCaptureRequest

TEMPLATE_RECORD

Create a request suitable for video recording.

Specifically, this means that a stable frame rate is used, and post-processing is set for recording quality. These requests would commonly be used with the ACameraCaptureSession_setRepeatingRequest method. This template is guaranteed to be supported on all camera devices.

See also: ACameraDevice_createCaptureRequest

TEMPLATE_STILL_CAPTURE

Create a request suitable for still image capture.

Specifically, this means prioritizing image quality over frame rate. These requests would commonly be used with the ACameraCaptureSession_capture method. This template is guaranteed to be supported on all camera devices.

See also: ACameraDevice_createCaptureRequest

TEMPLATE_VIDEO_SNAPSHOT

Create a request suitable for still image capture while recording video.

Specifically, this means maximizing image quality without disrupting the ongoing recording. These requests would commonly be used with the ACameraCaptureSession_capture method while a request based on TEMPLATE_RECORD is is in use with ACameraCaptureSession_setRepeatingRequest. This template is guaranteed to be supported on all camera devices.

See also: ACameraDevice_createCaptureRequest

TEMPLATE_ZERO_SHUTTER_LAG

Create a request suitable for zero shutter lag still capture.

This means means maximizing image quality without compromising preview frame rate. AE/AWB/AF should be on auto mode.

See also: ACameraDevice_createCaptureRequest

acamera_metadata_enum_acamera_black_level_lock

 acamera_metadata_enum_acamera_black_level_lock

acamera_metadata_enum_acamera_color_correction_aberration_mode

 acamera_metadata_enum_acamera_color_correction_aberration_mode
Properties
ACAMERA_COLOR_CORRECTION_ABERRATION_MODE_FAST

Aberration correction will not slow down capture rate relative to sensor raw output.

ACAMERA_COLOR_CORRECTION_ABERRATION_MODE_HIGH_QUALITY

Aberration correction operates at improved quality but the capture rate might be reduced (relative to sensor raw output rate)

ACAMERA_COLOR_CORRECTION_ABERRATION_MODE_OFF

No aberration correction is applied.

acamera_metadata_enum_acamera_color_correction_mode

 acamera_metadata_enum_acamera_color_correction_mode

Enumeration definitions for the various entries that need them.

Properties
ACAMERA_COLOR_CORRECTION_MODE_FAST

Color correction processing must not slow down capture rate relative to sensor raw output.

Advanced white balance adjustments above and beyond the specified white balance pipeline may be applied.

If AWB is enabled with ACAMERA_CONTROL_AWB_MODE != OFF, then the camera device uses the last frame's AWB values (or defaults if AWB has never been run).

See also: ACAMERA_CONTROL_AWB_MODE

ACAMERA_COLOR_CORRECTION_MODE_HIGH_QUALITY

Color correction processing operates at improved quality but the capture rate might be reduced (relative to sensor raw output rate)

Advanced white balance adjustments above and beyond the specified white balance pipeline may be applied.

If AWB is enabled with ACAMERA_CONTROL_AWB_MODE != OFF, then the camera device uses the last frame's AWB values (or defaults if AWB has never been run).

See also: ACAMERA_CONTROL_AWB_MODE

ACAMERA_COLOR_CORRECTION_MODE_TRANSFORM_MATRIX

Use the ACAMERA_COLOR_CORRECTION_TRANSFORM matrix and ACAMERA_COLOR_CORRECTION_GAINS to do color conversion.

All advanced white balance adjustments (not specified by our white balance pipeline) must be disabled.

If AWB is enabled with ACAMERA_CONTROL_AWB_MODE != OFF, then TRANSFORM_MATRIX is ignored. The camera device will override this value to either FAST or HIGH_QUALITY.

See also: ACAMERA_COLOR_CORRECTION_GAINS See also: ACAMERA_COLOR_CORRECTION_TRANSFORM See also: ACAMERA_CONTROL_AWB_MODE

acamera_metadata_enum_acamera_control_ae_antibanding_mode

 acamera_metadata_enum_acamera_control_ae_antibanding_mode
Properties
ACAMERA_CONTROL_AE_ANTIBANDING_MODE_50HZ

The camera device will adjust exposure duration to avoid banding problems with 50Hz illumination sources.

ACAMERA_CONTROL_AE_ANTIBANDING_MODE_60HZ

The camera device will adjust exposure duration to avoid banding problems with 60Hz illumination sources.

ACAMERA_CONTROL_AE_ANTIBANDING_MODE_AUTO

The camera device will automatically adapt its antibanding routine to the current illumination condition. This is the default mode if AUTO is available on given camera device.

ACAMERA_CONTROL_AE_ANTIBANDING_MODE_OFF

The camera device will not adjust exposure duration to avoid banding problems.

acamera_metadata_enum_acamera_control_ae_lock

 acamera_metadata_enum_acamera_control_ae_lock
Properties
ACAMERA_CONTROL_AE_LOCK_OFF

Auto-exposure lock is disabled; the AE algorithm is free to update its parameters.

ACAMERA_CONTROL_AE_LOCK_ON

Auto-exposure lock is enabled; the AE algorithm must not update the exposure and sensitivity parameters while the lock is active.

ACAMERA_CONTROL_AE_EXPOSURE_COMPENSATION setting changes will still take effect while auto-exposure is locked.

Some rare LEGACY devices may not support this, in which case the value will always be overridden to OFF.

See also: ACAMERA_CONTROL_AE_EXPOSURE_COMPENSATION

acamera_metadata_enum_acamera_control_ae_lock_available

 acamera_metadata_enum_acamera_control_ae_lock_available

acamera_metadata_enum_acamera_control_ae_mode

 acamera_metadata_enum_acamera_control_ae_mode
Properties
ACAMERA_CONTROL_AE_MODE_OFF

The camera device's autoexposure routine is disabled.

The application-selected ACAMERA_SENSOR_EXPOSURE_TIME, ACAMERA_SENSOR_SENSITIVITY and ACAMERA_SENSOR_FRAME_DURATION are used by the camera device, along with ACAMERA_FLASH_* fields, if there's a flash unit for this camera device.

Note that auto-white balance (AWB) and auto-focus (AF) behavior is device dependent when AE is in OFF mode. To have consistent behavior across different devices, it is recommended to either set AWB and AF to OFF mode or lock AWB and AF before setting AE to OFF. See ACAMERA_CONTROL_AWB_MODE, ACAMERA_CONTROL_AF_MODE, ACAMERA_CONTROL_AWB_LOCK, and ACAMERA_CONTROL_AF_TRIGGER for more details.

LEGACY devices do not support the OFF mode and will override attempts to use this value to ON.

See also: ACAMERA_CONTROL_AF_MODE See also: ACAMERA_CONTROL_AF_TRIGGER See also: ACAMERA_CONTROL_AWB_LOCK See also: ACAMERA_CONTROL_AWB_MODE See also: ACAMERA_SENSOR_EXPOSURE_TIME See also: ACAMERA_SENSOR_FRAME_DURATION See also: ACAMERA_SENSOR_SENSITIVITY

ACAMERA_CONTROL_AE_MODE_ON

The camera device's autoexposure routine is active, with no flash control.

The application's values for ACAMERA_SENSOR_EXPOSURE_TIME, ACAMERA_SENSOR_SENSITIVITY, and ACAMERA_SENSOR_FRAME_DURATION are ignored. The application has control over the various ACAMERA_FLASH_* fields.

See also: ACAMERA_SENSOR_EXPOSURE_TIME See also: ACAMERA_SENSOR_FRAME_DURATION See also: ACAMERA_SENSOR_SENSITIVITY

ACAMERA_CONTROL_AE_MODE_ON_ALWAYS_FLASH

Like ON, except that the camera device also controls the camera's flash unit, always firing it for still captures.

The flash may be fired during a precapture sequence (triggered by ACAMERA_CONTROL_AE_PRECAPTURE_TRIGGER) and will always be fired for captures for which the ACAMERA_CONTROL_CAPTURE_INTENT field is set to STILL_CAPTURE

See also: ACAMERA_CONTROL_AE_PRECAPTURE_TRIGGER See also: ACAMERA_CONTROL_CAPTURE_INTENT

ACAMERA_CONTROL_AE_MODE_ON_AUTO_FLASH

Like ON, except that the camera device also controls the camera's flash unit, firing it in low-light conditions.

The flash may be fired during a precapture sequence (triggered by ACAMERA_CONTROL_AE_PRECAPTURE_TRIGGER) and may be fired for captures for which the ACAMERA_CONTROL_CAPTURE_INTENT field is set to STILL_CAPTURE

See also: ACAMERA_CONTROL_AE_PRECAPTURE_TRIGGER See also: ACAMERA_CONTROL_CAPTURE_INTENT

ACAMERA_CONTROL_AE_MODE_ON_AUTO_FLASH_REDEYE

Like ON_AUTO_FLASH, but with automatic red eye reduction.

If deemed necessary by the camera device, a red eye reduction flash will fire during the precapture sequence.

ACAMERA_CONTROL_AE_MODE_ON_EXTERNAL_FLASH

An external flash has been turned on.

It informs the camera device that an external flash has been turned on, and that metering (and continuous focus if active) should be quickly recaculated to account for the external flash. Otherwise, this mode acts like ON.

When the external flash is turned off, AE mode should be changed to one of the other available AE modes.

If the camera device supports AE external flash mode, ACAMERA_CONTROL_AE_STATE must be FLASH_REQUIRED after the camera device finishes AE scan and it's too dark without flash.

See also: ACAMERA_CONTROL_AE_STATE

acamera_metadata_enum_acamera_control_ae_precapture_trigger

 acamera_metadata_enum_acamera_control_ae_precapture_trigger
Properties
ACAMERA_CONTROL_AE_PRECAPTURE_TRIGGER_CANCEL

The camera device will cancel any currently active or completed precapture metering sequence, the auto-exposure routine will return to its initial state.

ACAMERA_CONTROL_AE_PRECAPTURE_TRIGGER_IDLE

The trigger is idle.

ACAMERA_CONTROL_AE_PRECAPTURE_TRIGGER_START

The precapture metering sequence will be started by the camera device.

The exact effect of the precapture trigger depends on the current AE mode and state.

acamera_metadata_enum_acamera_control_ae_state

 acamera_metadata_enum_acamera_control_ae_state
Properties
ACAMERA_CONTROL_AE_STATE_CONVERGED

AE has a good set of control values for the current scene.

ACAMERA_CONTROL_AE_STATE_FLASH_REQUIRED

AE has a good set of control values, but flash needs to be fired for good quality still capture.

ACAMERA_CONTROL_AE_STATE_INACTIVE

AE is off or recently reset.

When a camera device is opened, it starts in this state. This is a transient state, the camera device may skip reporting this state in capture result.

ACAMERA_CONTROL_AE_STATE_LOCKED

AE has been locked.

ACAMERA_CONTROL_AE_STATE_PRECAPTURE

AE has been asked to do a precapture sequence and is currently executing it.

Precapture can be triggered through setting ACAMERA_CONTROL_AE_PRECAPTURE_TRIGGER to START. Currently active and completed (if it causes camera device internal AE lock) precapture metering sequence can be canceled through setting ACAMERA_CONTROL_AE_PRECAPTURE_TRIGGER to CANCEL.

Once PRECAPTURE completes, AE will transition to CONVERGED or FLASH_REQUIRED as appropriate. This is a transient state, the camera device may skip reporting this state in capture result.

See also: ACAMERA_CONTROL_AE_PRECAPTURE_TRIGGER

ACAMERA_CONTROL_AE_STATE_SEARCHING

AE doesn't yet have a good set of control values for the current scene.

This is a transient state, the camera device may skip reporting this state in capture result.

acamera_metadata_enum_acamera_control_af_mode

 acamera_metadata_enum_acamera_control_af_mode
Properties
ACAMERA_CONTROL_AF_MODE_AUTO

Basic automatic focus mode.

In this mode, the lens does not move unless the autofocus trigger action is called. When that trigger is activated, AF will transition to ACTIVE_SCAN, then to the outcome of the scan (FOCUSED or NOT_FOCUSED).

Always supported if lens is not fixed focus.

Use ACAMERA_LENS_INFO_MINIMUM_FOCUS_DISTANCE to determine if lens is fixed-focus.

Triggering AF_CANCEL resets the lens position to default, and sets the AF state to INACTIVE.

See also: ACAMERA_LENS_INFO_MINIMUM_FOCUS_DISTANCE

ACAMERA_CONTROL_AF_MODE_CONTINUOUS_PICTURE

In this mode, the AF algorithm modifies the lens position continually to attempt to provide a constantly-in-focus image stream.

The focusing behavior should be suitable for still image capture; typically this means focusing as fast as possible. When the AF trigger is not involved, the AF algorithm should start in INACTIVE state, and then transition into PASSIVE_SCAN and PASSIVE_FOCUSED states as appropriate as it attempts to maintain focus. When the AF trigger is activated, the algorithm should finish its PASSIVE_SCAN if active, and then transition into AF_FOCUSED or AF_NOT_FOCUSED as appropriate, and lock the lens position until a cancel AF trigger is received.

When the AF cancel trigger is activated, the algorithm should transition back to INACTIVE and then act as if it has just been started.

ACAMERA_CONTROL_AF_MODE_CONTINUOUS_VIDEO

In this mode, the AF algorithm modifies the lens position continually to attempt to provide a constantly-in-focus image stream.

The focusing behavior should be suitable for good quality video recording; typically this means slower focus movement and no overshoots. When the AF trigger is not involved, the AF algorithm should start in INACTIVE state, and then transition into PASSIVE_SCAN and PASSIVE_FOCUSED states as appropriate. When the AF trigger is activated, the algorithm should immediately transition into AF_FOCUSED or AF_NOT_FOCUSED as appropriate, and lock the lens position until a cancel AF trigger is received.

Once cancel is received, the algorithm should transition back to INACTIVE and resume passive scan. Note that this behavior is not identical to CONTINUOUS_PICTURE, since an ongoing PASSIVE_SCAN must immediately be canceled.

ACAMERA_CONTROL_AF_MODE_EDOF

Extended depth of field (digital focus) mode.

The camera device will produce images with an extended depth of field automatically; no special focusing operations need to be done before taking a picture.

AF triggers are ignored, and the AF state will always be INACTIVE.

ACAMERA_CONTROL_AF_MODE_MACRO

Close-up focusing mode.

In this mode, the lens does not move unless the autofocus trigger action is called. When that trigger is activated, AF will transition to ACTIVE_SCAN, then to the outcome of the scan (FOCUSED or NOT_FOCUSED). This mode is optimized for focusing on objects very close to the camera.

When that trigger is activated, AF will transition to ACTIVE_SCAN, then to the outcome of the scan (FOCUSED or NOT_FOCUSED). Triggering cancel AF resets the lens position to default, and sets the AF state to INACTIVE.

ACAMERA_CONTROL_AF_MODE_OFF

The auto-focus routine does not control the lens; ACAMERA_LENS_FOCUS_DISTANCE is controlled by the application.

See also: ACAMERA_LENS_FOCUS_DISTANCE

acamera_metadata_enum_acamera_control_af_scene_change

 acamera_metadata_enum_acamera_control_af_scene_change
Properties
ACAMERA_CONTROL_AF_SCENE_CHANGE_DETECTED

Scene change is detected within the AF region(s).

ACAMERA_CONTROL_AF_SCENE_CHANGE_NOT_DETECTED

Scene change is not detected within the AF region(s).

acamera_metadata_enum_acamera_control_af_state

 acamera_metadata_enum_acamera_control_af_state
Properties
ACAMERA_CONTROL_AF_STATE_ACTIVE_SCAN

AF is performing an AF scan because it was triggered by AF trigger.

Only used by AUTO or MACRO AF modes. This is a transient state, the camera device may skip reporting this state in capture result.

ACAMERA_CONTROL_AF_STATE_FOCUSED_LOCKED

AF believes it is focused correctly and has locked focus.

This state is reached only after an explicit START AF trigger has been sent (ACAMERA_CONTROL_AF_TRIGGER), when good focus has been obtained.

The lens will remain stationary until the AF mode (ACAMERA_CONTROL_AF_MODE) is changed or a new AF trigger is sent to the camera device (ACAMERA_CONTROL_AF_TRIGGER).

See also: ACAMERA_CONTROL_AF_MODE See also: ACAMERA_CONTROL_AF_TRIGGER

ACAMERA_CONTROL_AF_STATE_INACTIVE

AF is off or has not yet tried to scan/been asked to scan.

When a camera device is opened, it starts in this state. This is a transient state, the camera device may skip reporting this state in capture result.

ACAMERA_CONTROL_AF_STATE_NOT_FOCUSED_LOCKED

AF has failed to focus successfully and has locked focus.

This state is reached only after an explicit START AF trigger has been sent (ACAMERA_CONTROL_AF_TRIGGER), when good focus cannot be obtained.

The lens will remain stationary until the AF mode (ACAMERA_CONTROL_AF_MODE) is changed or a new AF trigger is sent to the camera device (ACAMERA_CONTROL_AF_TRIGGER).

See also: ACAMERA_CONTROL_AF_MODE See also: ACAMERA_CONTROL_AF_TRIGGER

ACAMERA_CONTROL_AF_STATE_PASSIVE_FOCUSED

AF currently believes it is in focus, but may restart scanning at any time.

Only used by CONTINUOUS_* AF modes. This is a transient state, the camera device may skip reporting this state in capture result.

ACAMERA_CONTROL_AF_STATE_PASSIVE_SCAN

AF is currently performing an AF scan initiated the camera device in a continuous autofocus mode.

Only used by CONTINUOUS_* AF modes. This is a transient state, the camera device may skip reporting this state in capture result.

ACAMERA_CONTROL_AF_STATE_PASSIVE_UNFOCUSED

AF finished a passive scan without finding focus, and may restart scanning at any time.

Only used by CONTINUOUS_* AF modes. This is a transient state, the camera device may skip reporting this state in capture result.

LEGACY camera devices do not support this state. When a passive scan has finished, it will always go to PASSIVE_FOCUSED.

acamera_metadata_enum_acamera_control_af_trigger

 acamera_metadata_enum_acamera_control_af_trigger
Properties
ACAMERA_CONTROL_AF_TRIGGER_CANCEL

Autofocus will return to its initial state, and cancel any currently active trigger.

ACAMERA_CONTROL_AF_TRIGGER_IDLE

The trigger is idle.

ACAMERA_CONTROL_AF_TRIGGER_START

Autofocus will trigger now.

acamera_metadata_enum_acamera_control_awb_lock

 acamera_metadata_enum_acamera_control_awb_lock
Properties
ACAMERA_CONTROL_AWB_LOCK_OFF

Auto-white balance lock is disabled; the AWB algorithm is free to update its parameters if in AUTO mode.

ACAMERA_CONTROL_AWB_LOCK_ON

Auto-white balance lock is enabled; the AWB algorithm will not update its parameters while the lock is active.

acamera_metadata_enum_acamera_control_awb_lock_available

 acamera_metadata_enum_acamera_control_awb_lock_available

acamera_metadata_enum_acamera_control_awb_mode

 acamera_metadata_enum_acamera_control_awb_mode
Properties
ACAMERA_CONTROL_AWB_MODE_AUTO

The camera device's auto-white balance routine is active.

The application's values for ACAMERA_COLOR_CORRECTION_TRANSFORM and ACAMERA_COLOR_CORRECTION_GAINS are ignored. For devices that support the MANUAL_POST_PROCESSING capability, the values used by the camera device for the transform and gains will be available in the capture result for this request.

See also: ACAMERA_COLOR_CORRECTION_GAINS See also: ACAMERA_COLOR_CORRECTION_TRANSFORM

ACAMERA_CONTROL_AWB_MODE_CLOUDY_DAYLIGHT

The camera device's auto-white balance routine is disabled; the camera device uses cloudy daylight light as the assumed scene illumination for white balance.

The application's values for ACAMERA_COLOR_CORRECTION_TRANSFORM and ACAMERA_COLOR_CORRECTION_GAINS are ignored. For devices that support the MANUAL_POST_PROCESSING capability, the values used by the camera device for the transform and gains will be available in the capture result for this request.

See also: ACAMERA_COLOR_CORRECTION_GAINS See also: ACAMERA_COLOR_CORRECTION_TRANSFORM

ACAMERA_CONTROL_AWB_MODE_DAYLIGHT

The camera device's auto-white balance routine is disabled; the camera device uses daylight light as the assumed scene illumination for white balance.

While the exact white balance transforms are up to the camera device, they will approximately match the CIE standard illuminant D65.

The application's values for ACAMERA_COLOR_CORRECTION_TRANSFORM and ACAMERA_COLOR_CORRECTION_GAINS are ignored. For devices that support the MANUAL_POST_PROCESSING capability, the values used by the camera device for the transform and gains will be available in the capture result for this request.

See also: ACAMERA_COLOR_CORRECTION_GAINS See also: ACAMERA_COLOR_CORRECTION_TRANSFORM

ACAMERA_CONTROL_AWB_MODE_FLUORESCENT

The camera device's auto-white balance routine is disabled; the camera device uses fluorescent light as the assumed scene illumination for white balance.

While the exact white balance transforms are up to the camera device, they will approximately match the CIE standard illuminant F2.

The application's values for ACAMERA_COLOR_CORRECTION_TRANSFORM and ACAMERA_COLOR_CORRECTION_GAINS are ignored. For devices that support the MANUAL_POST_PROCESSING capability, the values used by the camera device for the transform and gains will be available in the capture result for this request.

See also: ACAMERA_COLOR_CORRECTION_GAINS See also: ACAMERA_COLOR_CORRECTION_TRANSFORM

ACAMERA_CONTROL_AWB_MODE_INCANDESCENT

The camera device's auto-white balance routine is disabled; the camera device uses incandescent light as the assumed scene illumination for white balance.

While the exact white balance transforms are up to the camera device, they will approximately match the CIE standard illuminant A.

The application's values for ACAMERA_COLOR_CORRECTION_TRANSFORM and ACAMERA_COLOR_CORRECTION_GAINS are ignored. For devices that support the MANUAL_POST_PROCESSING capability, the values used by the camera device for the transform and gains will be available in the capture result for this request.

See also: ACAMERA_COLOR_CORRECTION_GAINS See also: ACAMERA_COLOR_CORRECTION_TRANSFORM

ACAMERA_CONTROL_AWB_MODE_OFF

The camera device's auto-white balance routine is disabled.

The application-selected color transform matrix (ACAMERA_COLOR_CORRECTION_TRANSFORM) and gains (ACAMERA_COLOR_CORRECTION_GAINS) are used by the camera device for manual white balance control.

See also: ACAMERA_COLOR_CORRECTION_GAINS See also: ACAMERA_COLOR_CORRECTION_TRANSFORM

ACAMERA_CONTROL_AWB_MODE_SHADE

The camera device's auto-white balance routine is disabled; the camera device uses shade light as the assumed scene illumination for white balance.

The application's values for ACAMERA_COLOR_CORRECTION_TRANSFORM and ACAMERA_COLOR_CORRECTION_GAINS are ignored. For devices that support the MANUAL_POST_PROCESSING capability, the values used by the camera device for the transform and gains will be available in the capture result for this request.

See also: ACAMERA_COLOR_CORRECTION_GAINS See also: ACAMERA_COLOR_CORRECTION_TRANSFORM

ACAMERA_CONTROL_AWB_MODE_TWILIGHT

The camera device's auto-white balance routine is disabled; the camera device uses twilight light as the assumed scene illumination for white balance.

The application's values for ACAMERA_COLOR_CORRECTION_TRANSFORM and ACAMERA_COLOR_CORRECTION_GAINS are ignored. For devices that support the MANUAL_POST_PROCESSING capability, the values used by the camera device for the transform and gains will be available in the capture result for this request.

See also: ACAMERA_COLOR_CORRECTION_GAINS See also: ACAMERA_COLOR_CORRECTION_TRANSFORM

ACAMERA_CONTROL_AWB_MODE_WARM_FLUORESCENT

The camera device's auto-white balance routine is disabled; the camera device uses warm fluorescent light as the assumed scene illumination for white balance.

While the exact white balance transforms are up to the camera device, they will approximately match the CIE standard illuminant F4.

The application's values for ACAMERA_COLOR_CORRECTION_TRANSFORM and ACAMERA_COLOR_CORRECTION_GAINS are ignored. For devices that support the MANUAL_POST_PROCESSING capability, the values used by the camera device for the transform and gains will be available in the capture result for this request.

See also: ACAMERA_COLOR_CORRECTION_GAINS See also: ACAMERA_COLOR_CORRECTION_TRANSFORM

acamera_metadata_enum_acamera_control_awb_state

 acamera_metadata_enum_acamera_control_awb_state
Properties
ACAMERA_CONTROL_AWB_STATE_CONVERGED

AWB has a good set of control values for the current scene.

ACAMERA_CONTROL_AWB_STATE_INACTIVE

AWB is not in auto mode, or has not yet started metering.

When a camera device is opened, it starts in this state. This is a transient state, the camera device may skip reporting this state in capture result.

ACAMERA_CONTROL_AWB_STATE_LOCKED

AWB has been locked.

ACAMERA_CONTROL_AWB_STATE_SEARCHING

AWB doesn't yet have a good set of control values for the current scene.

This is a transient state, the camera device may skip reporting this state in capture result.

acamera_metadata_enum_acamera_control_capture_intent

 acamera_metadata_enum_acamera_control_capture_intent
Properties
ACAMERA_CONTROL_CAPTURE_INTENT_CUSTOM

The goal of this request doesn't fall into the other categories. The camera device will default to preview-like behavior.

ACAMERA_CONTROL_CAPTURE_INTENT_MANUAL

This request is for manual capture use case where the applications want to directly control the capture parameters.

For example, the application may wish to manually control ACAMERA_SENSOR_EXPOSURE_TIME, ACAMERA_SENSOR_SENSITIVITY, etc.

See also: ACAMERA_SENSOR_EXPOSURE_TIME See also: ACAMERA_SENSOR_SENSITIVITY

ACAMERA_CONTROL_CAPTURE_INTENT_MOTION_TRACKING

This request is for a motion tracking use case, where the application will use camera and inertial sensor data to locate and track objects in the world.

The camera device auto-exposure routine will limit the exposure time of the camera to no more than 20 milliseconds, to minimize motion blur.

ACAMERA_CONTROL_CAPTURE_INTENT_PREVIEW

This request is for a preview-like use case.

The precapture trigger may be used to start off a metering w/flash sequence.

ACAMERA_CONTROL_CAPTURE_INTENT_STILL_CAPTURE

This request is for a still capture-type use case.

If the flash unit is under automatic control, it may fire as needed.

ACAMERA_CONTROL_CAPTURE_INTENT_VIDEO_RECORD

This request is for a video recording use case.

ACAMERA_CONTROL_CAPTURE_INTENT_VIDEO_SNAPSHOT

This request is for a video snapshot (still image while recording video) use case.

The camera device should take the highest-quality image possible (given the other settings) without disrupting the frame rate of video recording.

ACAMERA_CONTROL_CAPTURE_INTENT_ZERO_SHUTTER_LAG

This request is for a ZSL usecase; the application will stream full-resolution images and reprocess one or several later for a final capture.

acamera_metadata_enum_acamera_control_effect_mode

 acamera_metadata_enum_acamera_control_effect_mode
Properties
ACAMERA_CONTROL_EFFECT_MODE_AQUA

An "aqua" effect where a blue hue is added to the image.

ACAMERA_CONTROL_EFFECT_MODE_BLACKBOARD

A "blackboard" effect where the image is typically displayed as regions of black, with white or grey details.

ACAMERA_CONTROL_EFFECT_MODE_MONO

A "monocolor" effect where the image is mapped into a single color.

This will typically be grayscale.

ACAMERA_CONTROL_EFFECT_MODE_NEGATIVE

A "photo-negative" effect where the image's colors are inverted.

ACAMERA_CONTROL_EFFECT_MODE_OFF

No color effect will be applied.

ACAMERA_CONTROL_EFFECT_MODE_POSTERIZE

A "posterization" effect where the image uses discrete regions of tone rather than a continuous gradient of tones.

ACAMERA_CONTROL_EFFECT_MODE_SEPIA

A "sepia" effect where the image is mapped into warm gray, red, and brown tones.

ACAMERA_CONTROL_EFFECT_MODE_SOLARIZE

A "solarisation" effect (Sabattier effect) where the image is wholly or partially reversed in tone.

ACAMERA_CONTROL_EFFECT_MODE_WHITEBOARD

A "whiteboard" effect where the image is typically displayed as regions of white, with black or grey details.

acamera_metadata_enum_acamera_control_enable_zsl

 acamera_metadata_enum_acamera_control_enable_zsl
Properties
ACAMERA_CONTROL_ENABLE_ZSL_FALSE

Requests with ACAMERA_CONTROL_CAPTURE_INTENT == STILL_CAPTURE must be captured after previous requests.

See also: ACAMERA_CONTROL_CAPTURE_INTENT

ACAMERA_CONTROL_ENABLE_ZSL_TRUE

Requests with ACAMERA_CONTROL_CAPTURE_INTENT == STILL_CAPTURE may or may not be captured before previous requests.

See also: ACAMERA_CONTROL_CAPTURE_INTENT

acamera_metadata_enum_acamera_control_mode

 acamera_metadata_enum_acamera_control_mode
Properties
ACAMERA_CONTROL_MODE_AUTO

Use settings for each individual 3A routine.

Manual control of capture parameters is disabled. All controls in ACAMERA_CONTROL_* besides sceneMode take effect.

ACAMERA_CONTROL_MODE_OFF

Full application control of pipeline.

All control by the device's metering and focusing (3A) routines is disabled, and no other settings in ACAMERA_CONTROL_* have any effect, except that ACAMERA_CONTROL_CAPTURE_INTENT may be used by the camera device to select post-processing values for processing blocks that do not allow for manual control, or are not exposed by the camera API.

However, the camera device's 3A routines may continue to collect statistics and update their internal state so that when control is switched to AUTO mode, good control values can be immediately applied.

See also: ACAMERA_CONTROL_CAPTURE_INTENT

ACAMERA_CONTROL_MODE_OFF_KEEP_STATE

Same as OFF mode, except that this capture will not be used by camera device background auto-exposure, auto-white balance and auto-focus algorithms (3A) to update their statistics.

Specifically, the 3A routines are locked to the last values set from a request with AUTO, OFF, or USE_SCENE_MODE, and any statistics or state updates collected from manual captures with OFF_KEEP_STATE will be discarded by the camera device.

ACAMERA_CONTROL_MODE_USE_SCENE_MODE

Use a specific scene mode.

Enabling this disables control.aeMode, control.awbMode and control.afMode controls; the camera device will ignore those settings while USE_SCENE_MODE is active (except for FACE_PRIORITY scene mode). Other control entries are still active. This setting can only be used if scene mode is supported (i.e. ACAMERA_CONTROL_AVAILABLE_SCENE_MODES contain some modes other than DISABLED).

See also: ACAMERA_CONTROL_AVAILABLE_SCENE_MODES

acamera_metadata_enum_acamera_control_scene_mode

 acamera_metadata_enum_acamera_control_scene_mode
Properties
ACAMERA_CONTROL_SCENE_MODE_ACTION

Optimized for photos of quickly moving objects.

Similar to SPORTS.

ACAMERA_CONTROL_SCENE_MODE_BARCODE

Optimized for accurately capturing a photo of barcode for use by camera applications that wish to read the barcode value.

ACAMERA_CONTROL_SCENE_MODE_BEACH

Optimized for bright, outdoor beach settings.

ACAMERA_CONTROL_SCENE_MODE_CANDLELIGHT

Optimized for dim settings where the main light source is a flame.

ACAMERA_CONTROL_SCENE_MODE_DISABLED

Indicates that no scene modes are set for a given capture request.

ACAMERA_CONTROL_SCENE_MODE_FACE_PRIORITY

If face detection support exists, use face detection data for auto-focus, auto-white balance, and auto-exposure routines.

If face detection statistics are disabled (i.e. ACAMERA_STATISTICS_FACE_DETECT_MODE is set to OFF), this should still operate correctly (but will not return face detection statistics to the framework).

Unlike the other scene modes, ACAMERA_CONTROL_AE_MODE, ACAMERA_CONTROL_AWB_MODE, and ACAMERA_CONTROL_AF_MODE remain active when FACE_PRIORITY is set.

See also: ACAMERA_CONTROL_AE_MODE See also: ACAMERA_CONTROL_AF_MODE See also: ACAMERA_CONTROL_AWB_MODE See also: ACAMERA_STATISTICS_FACE_DETECT_MODE

ACAMERA_CONTROL_SCENE_MODE_FIREWORKS

Optimized for nighttime photos of fireworks.

ACAMERA_CONTROL_SCENE_MODE_HDR

Turn on a device-specific high dynamic range (HDR) mode.

In this scene mode, the camera device captures images that keep a larger range of scene illumination levels visible in the final image. For example, when taking a picture of a object in front of a bright window, both the object and the scene through the window may be visible when using HDR mode, while in normal AUTO mode, one or the other may be poorly exposed. As a tradeoff, HDR mode generally takes much longer to capture a single image, has no user control, and may have other artifacts depending on the HDR method used.

Therefore, HDR captures operate at a much slower rate than regular captures.

In this mode, on LIMITED or FULL devices, when a request is made with a ACAMERA_CONTROL_CAPTURE_INTENT of STILL_CAPTURE, the camera device will capture an image using a high dynamic range capture technique. On LEGACY devices, captures that target a JPEG-format output will be captured with HDR, and the capture intent is not relevant.

The HDR capture may involve the device capturing a burst of images internally and combining them into one, or it may involve the device using specialized high dynamic range capture hardware. In all cases, a single image is produced in response to a capture request submitted while in HDR mode.

Since substantial post-processing is generally needed to produce an HDR image, only YUV, PRIVATE, and JPEG outputs are supported for LIMITED/FULL device HDR captures, and only JPEG outputs are supported for LEGACY HDR captures. Using a RAW output for HDR capture is not supported.

Some devices may also support always-on HDR, which applies HDR processing at full frame rate. For these devices, intents other than STILL_CAPTURE will also produce an HDR output with no frame rate impact compared to normal operation, though the quality may be lower than for STILL_CAPTURE intents.

If SCENE_MODE_HDR is used with unsupported output types or capture intents, the images captured will be as if the SCENE_MODE was not enabled at all.

See also: ACAMERA_CONTROL_CAPTURE_INTENT

ACAMERA_CONTROL_SCENE_MODE_LANDSCAPE

Optimized for photos of distant macroscopic objects.

ACAMERA_CONTROL_SCENE_MODE_NIGHT

Optimized for low-light settings.

ACAMERA_CONTROL_SCENE_MODE_NIGHT_PORTRAIT

Optimized for still photos of people in low-light settings.

ACAMERA_CONTROL_SCENE_MODE_PARTY

Optimized for dim, indoor settings with multiple moving people.

ACAMERA_CONTROL_SCENE_MODE_PORTRAIT

Optimized for still photos of people.

ACAMERA_CONTROL_SCENE_MODE_SNOW

Optimized for bright, outdoor settings containing snow.

ACAMERA_CONTROL_SCENE_MODE_SPORTS

Optimized for photos of quickly moving people.

Similar to ACTION.

ACAMERA_CONTROL_SCENE_MODE_STEADYPHOTO

Optimized to avoid blurry photos due to small amounts of device motion (for example: due to hand shake).

ACAMERA_CONTROL_SCENE_MODE_SUNSET

Optimized for scenes of the setting sun.

ACAMERA_CONTROL_SCENE_MODE_THEATRE

Optimized for dim, indoor settings where flash must remain off.

acamera_metadata_enum_acamera_control_video_stabilization_mode

 acamera_metadata_enum_acamera_control_video_stabilization_mode
Properties
ACAMERA_CONTROL_VIDEO_STABILIZATION_MODE_OFF

Video stabilization is disabled.

ACAMERA_CONTROL_VIDEO_STABILIZATION_MODE_ON

Video stabilization is enabled.

acamera_metadata_enum_acamera_depth_available_depth_stream_configurations

 acamera_metadata_enum_acamera_depth_available_depth_stream_configurations

acamera_metadata_enum_acamera_depth_depth_is_exclusive

 acamera_metadata_enum_acamera_depth_depth_is_exclusive

acamera_metadata_enum_acamera_distortion_correction_mode

 acamera_metadata_enum_acamera_distortion_correction_mode
Properties
ACAMERA_DISTORTION_CORRECTION_MODE_FAST

Lens distortion correction is applied without reducing frame rate relative to sensor output. It may be the same as OFF if distortion correction would reduce frame rate relative to sensor.

ACAMERA_DISTORTION_CORRECTION_MODE_HIGH_QUALITY

High-quality distortion correction is applied, at the cost of possibly reduced frame rate relative to sensor output.

ACAMERA_DISTORTION_CORRECTION_MODE_OFF

No distortion correction is applied.

acamera_metadata_enum_acamera_edge_mode

 acamera_metadata_enum_acamera_edge_mode
Properties
ACAMERA_EDGE_MODE_FAST

Apply edge enhancement at a quality level that does not slow down frame rate relative to sensor output. It may be the same as OFF if edge enhancement will slow down frame rate relative to sensor.

ACAMERA_EDGE_MODE_HIGH_QUALITY

Apply high-quality edge enhancement, at a cost of possibly reduced output frame rate.

ACAMERA_EDGE_MODE_OFF

No edge enhancement is applied.

ACAMERA_EDGE_MODE_ZERO_SHUTTER_LAG

Edge enhancement is applied at different levels for different output streams, based on resolution. Streams at maximum recording resolution (see ACameraDevice_createCaptureSession) or below have edge enhancement applied, while higher-resolution streams have no edge enhancement applied. The level of edge enhancement for low-resolution streams is tuned so that frame rate is not impacted, and the quality is equal to or better than FAST (since it is only applied to lower-resolution outputs, quality may improve from FAST).

This mode is intended to be used by applications operating in a zero-shutter-lag mode with YUV or PRIVATE reprocessing, where the application continuously captures high-resolution intermediate buffers into a circular buffer, from which a final image is produced via reprocessing when a user takes a picture. For such a use case, the high-resolution buffers must not have edge enhancement applied to maximize efficiency of preview and to avoid double-applying enhancement when reprocessed, while low-resolution buffers (used for recording or preview, generally) need edge enhancement applied for reasonable preview quality.

This mode is guaranteed to be supported by devices that support either the YUV_REPROCESSING or PRIVATE_REPROCESSING capabilities (ACAMERA_REQUEST_AVAILABLE_CAPABILITIES lists either of those capabilities) and it will be the default mode for CAMERA3_TEMPLATE_ZERO_SHUTTER_LAG template.

See also: ACAMERA_REQUEST_AVAILABLE_CAPABILITIES

acamera_metadata_enum_acamera_flash_info_available

 acamera_metadata_enum_acamera_flash_info_available

acamera_metadata_enum_acamera_flash_mode

 acamera_metadata_enum_acamera_flash_mode
Properties
ACAMERA_FLASH_MODE_OFF

Do not fire the flash for this capture.

ACAMERA_FLASH_MODE_SINGLE

If the flash is available and charged, fire flash for this capture.

ACAMERA_FLASH_MODE_TORCH

Transition flash to continuously on.

acamera_metadata_enum_acamera_flash_state

 acamera_metadata_enum_acamera_flash_state
Properties
ACAMERA_FLASH_STATE_CHARGING

Flash is charging and cannot be fired.

ACAMERA_FLASH_STATE_FIRED

Flash fired for this capture.

ACAMERA_FLASH_STATE_PARTIAL

Flash partially illuminated this frame.

This is usually due to the next or previous frame having the flash fire, and the flash spilling into this capture due to hardware limitations.

ACAMERA_FLASH_STATE_READY

Flash is ready to fire.

ACAMERA_FLASH_STATE_UNAVAILABLE

No flash on camera.

acamera_metadata_enum_acamera_hot_pixel_mode

 acamera_metadata_enum_acamera_hot_pixel_mode
Properties
ACAMERA_HOT_PIXEL_MODE_FAST

Hot pixel correction is applied, without reducing frame rate relative to sensor raw output.

The hotpixel map may be returned in ACAMERA_STATISTICS_HOT_PIXEL_MAP.

See also: ACAMERA_STATISTICS_HOT_PIXEL_MAP

ACAMERA_HOT_PIXEL_MODE_HIGH_QUALITY

High-quality hot pixel correction is applied, at a cost of possibly reduced frame rate relative to sensor raw output.

The hotpixel map may be returned in ACAMERA_STATISTICS_HOT_PIXEL_MAP.

See also: ACAMERA_STATISTICS_HOT_PIXEL_MAP

ACAMERA_HOT_PIXEL_MODE_OFF

No hot pixel correction is applied.

The frame rate must not be reduced relative to sensor raw output for this option.

The hotpixel map may be returned in ACAMERA_STATISTICS_HOT_PIXEL_MAP.

See also: ACAMERA_STATISTICS_HOT_PIXEL_MAP

acamera_metadata_enum_acamera_info_supported_hardware_level

 acamera_metadata_enum_acamera_info_supported_hardware_level
Properties
ACAMERA_INFO_SUPPORTED_HARDWARE_LEVEL_3

This camera device is capable of YUV reprocessing and RAW data capture, in addition to FULL-level capabilities.

The stream configurations listed in the LEVEL_3, RAW, FULL, LEGACY and LIMITED tables in the createCaptureSession documentation are guaranteed to be supported.

The following additional capabilities are guaranteed to be supported:

  • YUV_REPROCESSING capability (ACAMERA_REQUEST_AVAILABLE_CAPABILITIES contains YUV_REPROCESSING)
  • RAW capability (ACAMERA_REQUEST_AVAILABLE_CAPABILITIES contains RAW)

See also: ACAMERA_REQUEST_AVAILABLE_CAPABILITIES

ACAMERA_INFO_SUPPORTED_HARDWARE_LEVEL_EXTERNAL

This camera device is backed by an external camera connected to this Android device.

The device has capability identical to a LIMITED level device, with the following exceptions:

  • The device may not report lens/sensor related information such as
    • ACAMERA_LENS_FOCAL_LENGTH
    • ACAMERA_LENS_INFO_HYPERFOCAL_DISTANCE
    • ACAMERA_SENSOR_INFO_PHYSICAL_SIZE
    • ACAMERA_SENSOR_INFO_WHITE_LEVEL
    • ACAMERA_SENSOR_BLACK_LEVEL_PATTERN
    • ACAMERA_SENSOR_INFO_COLOR_FILTER_ARRANGEMENT
    • ACAMERA_SENSOR_ROLLING_SHUTTER_SKEW
  • The device will report 0 for ACAMERA_SENSOR_ORIENTATION
  • The device has less guarantee on stable framerate, as the framerate partly depends on the external camera being used.

See also: ACAMERA_LENS_FOCAL_LENGTH See also: ACAMERA_LENS_INFO_HYPERFOCAL_DISTANCE See also: ACAMERA_SENSOR_BLACK_LEVEL_PATTERN See also: ACAMERA_SENSOR_INFO_COLOR_FILTER_ARRANGEMENT See also: ACAMERA_SENSOR_INFO_PHYSICAL_SIZE See also: ACAMERA_SENSOR_INFO_WHITE_LEVEL See also: ACAMERA_SENSOR_ORIENTATION See also: ACAMERA_SENSOR_ROLLING_SHUTTER_SKEW

ACAMERA_INFO_SUPPORTED_HARDWARE_LEVEL_FULL

This camera device is capable of supporting advanced imaging applications.

The stream configurations listed in the FULL, LEGACY and LIMITED tables in the createCaptureSession documentation are guaranteed to be supported.

A FULL device will support below capabilities:

  • BURST_CAPTURE capability (ACAMERA_REQUEST_AVAILABLE_CAPABILITIES contains BURST_CAPTURE)
  • Per frame control (ACAMERA_SYNC_MAX_LATENCY == PER_FRAME_CONTROL)
  • Manual sensor control (ACAMERA_REQUEST_AVAILABLE_CAPABILITIES contains MANUAL_SENSOR)
  • Manual post-processing control (ACAMERA_REQUEST_AVAILABLE_CAPABILITIES contains MANUAL_POST_PROCESSING)
  • The required exposure time range defined in ACAMERA_SENSOR_INFO_EXPOSURE_TIME_RANGE
  • The required maxFrameDuration defined in ACAMERA_SENSOR_INFO_MAX_FRAME_DURATION

Note: Pre-API level 23, FULL devices also supported arbitrary cropping region (ACAMERA_SCALER_CROPPING_TYPE == FREEFORM); this requirement was relaxed in API level 23, and FULL devices may only support CENTERED cropping.

See also: ACAMERA_REQUEST_AVAILABLE_CAPABILITIES See also: ACAMERA_SCALER_CROPPING_TYPE See also: ACAMERA_SENSOR_INFO_EXPOSURE_TIME_RANGE See also: ACAMERA_SENSOR_INFO_MAX_FRAME_DURATION See also: ACAMERA_SYNC_MAX_LATENCY

ACAMERA_INFO_SUPPORTED_HARDWARE_LEVEL_LEGACY

This camera device is running in backward compatibility mode.

Only the stream configurations listed in the LEGACY table in the createCaptureSession documentation are supported.

A LEGACY device does not support per-frame control, manual sensor control, manual post-processing, arbitrary cropping regions, and has relaxed performance constraints. No additional capabilities beyond BACKWARD_COMPATIBLE will ever be listed by a LEGACY device in ACAMERA_REQUEST_AVAILABLE_CAPABILITIES.

In addition, the ACAMERA_CONTROL_AE_PRECAPTURE_TRIGGER is not functional on LEGACY devices. Instead, every request that includes a JPEG-format output target is treated as triggering a still capture, internally executing a precapture trigger. This may fire the flash for flash power metering during precapture, and then fire the flash for the final capture, if a flash is available on the device and the AE mode is set to enable the flash.

See also: ACAMERA_CONTROL_AE_PRECAPTURE_TRIGGER See also: ACAMERA_REQUEST_AVAILABLE_CAPABILITIES

ACAMERA_INFO_SUPPORTED_HARDWARE_LEVEL_LIMITED

This camera device does not have enough capabilities to qualify as a FULL device or better.

Only the stream configurations listed in the LEGACY and LIMITED tables in the createCaptureSession documentation are guaranteed to be supported.

All LIMITED devices support the BACKWARDS_COMPATIBLE capability, indicating basic support for color image capture. The only exception is that the device may alternatively support only the DEPTH_OUTPUT capability, if it can only output depth measurements and not color images.

LIMITED devices and above require the use of ACAMERA_CONTROL_AE_PRECAPTURE_TRIGGER to lock exposure metering (and calculate flash power, for cameras with flash) before capturing a high-quality still image.

A LIMITED device that only lists the BACKWARDS_COMPATIBLE capability is only required to support full-automatic operation and post-processing (OFF is not supported for ACAMERA_CONTROL_AE_MODE, ACAMERA_CONTROL_AF_MODE, or ACAMERA_CONTROL_AWB_MODE)

Additional capabilities may optionally be supported by a LIMITED-level device, and can be checked for in ACAMERA_REQUEST_AVAILABLE_CAPABILITIES.

See also: ACAMERA_CONTROL_AE_MODE See also: ACAMERA_CONTROL_AE_PRECAPTURE_TRIGGER See also: ACAMERA_CONTROL_AF_MODE See also: ACAMERA_CONTROL_AWB_MODE See also: ACAMERA_REQUEST_AVAILABLE_CAPABILITIES

acamera_metadata_enum_acamera_lens_facing

 acamera_metadata_enum_acamera_lens_facing
Properties
ACAMERA_LENS_FACING_BACK

The camera device faces the opposite direction as the device's screen.

ACAMERA_LENS_FACING_EXTERNAL

The camera device is an external camera, and has no fixed facing relative to the device's screen.

ACAMERA_LENS_FACING_FRONT

The camera device faces the same direction as the device's screen.

acamera_metadata_enum_acamera_lens_info_focus_distance_calibration

 acamera_metadata_enum_acamera_lens_info_focus_distance_calibration
Properties
ACAMERA_LENS_INFO_FOCUS_DISTANCE_CALIBRATION_APPROXIMATE

The lens focus distance is measured in diopters.

However, setting the lens to the same focus distance on separate occasions may result in a different real focus distance, depending on factors such as the orientation of the device, the age of the focusing mechanism, and the device temperature.

ACAMERA_LENS_INFO_FOCUS_DISTANCE_CALIBRATION_CALIBRATED

The lens focus distance is measured in diopters, and is calibrated.

The lens mechanism is calibrated so that setting the same focus distance is repeatable on multiple occasions with good accuracy, and the focus distance corresponds to the real physical distance to the plane of best focus.

ACAMERA_LENS_INFO_FOCUS_DISTANCE_CALIBRATION_UNCALIBRATED

The lens focus distance is not accurate, and the units used for ACAMERA_LENS_FOCUS_DISTANCE do not correspond to any physical units.

Setting the lens to the same focus distance on separate occasions may result in a different real focus distance, depending on factors such as the orientation of the device, the age of the focusing mechanism, and the device temperature. The focus distance value will still be in the range of [0, ACAMERA_LENS_INFO_MINIMUM_FOCUS_DISTANCE], where 0 represents the farthest focus.

See also: ACAMERA_LENS_FOCUS_DISTANCE See also: ACAMERA_LENS_INFO_MINIMUM_FOCUS_DISTANCE

acamera_metadata_enum_acamera_lens_optical_stabilization_mode

 acamera_metadata_enum_acamera_lens_optical_stabilization_mode
Properties
ACAMERA_LENS_OPTICAL_STABILIZATION_MODE_OFF

Optical stabilization is unavailable.

ACAMERA_LENS_OPTICAL_STABILIZATION_MODE_ON

Optical stabilization is enabled.

acamera_metadata_enum_acamera_lens_pose_reference

 acamera_metadata_enum_acamera_lens_pose_reference
Properties
ACAMERA_LENS_POSE_REFERENCE_GYROSCOPE

The value of ACAMERA_LENS_POSE_TRANSLATION is relative to the position of the primary gyroscope of this Android device.

See also: ACAMERA_LENS_POSE_TRANSLATION

ACAMERA_LENS_POSE_REFERENCE_PRIMARY_CAMERA

The value of ACAMERA_LENS_POSE_TRANSLATION is relative to the optical center of the largest camera device facing the same direction as this camera.

This is the default value for API levels before Android P.

See also: ACAMERA_LENS_POSE_TRANSLATION

acamera_metadata_enum_acamera_lens_state

 acamera_metadata_enum_acamera_lens_state
Properties
ACAMERA_LENS_STATE_MOVING

One or several of the lens parameters (ACAMERA_LENS_FOCAL_LENGTH, ACAMERA_LENS_FOCUS_DISTANCE, ACAMERA_LENS_FILTER_DENSITY or ACAMERA_LENS_APERTURE) is currently changing.

See also: ACAMERA_LENS_APERTURE See also: ACAMERA_LENS_FILTER_DENSITY See also: ACAMERA_LENS_FOCAL_LENGTH See also: ACAMERA_LENS_FOCUS_DISTANCE

ACAMERA_LENS_STATE_STATIONARY

The lens parameters (ACAMERA_LENS_FOCAL_LENGTH, ACAMERA_LENS_FOCUS_DISTANCE, ACAMERA_LENS_FILTER_DENSITY and ACAMERA_LENS_APERTURE) are not changing.

See also: ACAMERA_LENS_APERTURE See also: ACAMERA_LENS_FILTER_DENSITY See also: ACAMERA_LENS_FOCAL_LENGTH See also: ACAMERA_LENS_FOCUS_DISTANCE

acamera_metadata_enum_acamera_logical_multi_camera_sensor_sync_type

 acamera_metadata_enum_acamera_logical_multi_camera_sensor_sync_type
Properties
ACAMERA_LOGICAL_MULTI_CAMERA_SENSOR_SYNC_TYPE_APPROXIMATE

A software mechanism is used to synchronize between the physical cameras. As a result, the timestamp of an image from a physical stream is only an approximation of the image sensor start-of-exposure time.

ACAMERA_LOGICAL_MULTI_CAMERA_SENSOR_SYNC_TYPE_CALIBRATED

The camera device supports frame timestamp synchronization at the hardware level, and the timestamp of a physical stream image accurately reflects its start-of-exposure time.

acamera_metadata_enum_acamera_noise_reduction_mode

 acamera_metadata_enum_acamera_noise_reduction_mode
Properties
ACAMERA_NOISE_REDUCTION_MODE_FAST

Noise reduction is applied without reducing frame rate relative to sensor output. It may be the same as OFF if noise reduction will reduce frame rate relative to sensor.

ACAMERA_NOISE_REDUCTION_MODE_HIGH_QUALITY

High-quality noise reduction is applied, at the cost of possibly reduced frame rate relative to sensor output.

ACAMERA_NOISE_REDUCTION_MODE_MINIMAL

MINIMAL noise reduction is applied without reducing frame rate relative to sensor output.

ACAMERA_NOISE_REDUCTION_MODE_OFF

No noise reduction is applied.

ACAMERA_NOISE_REDUCTION_MODE_ZERO_SHUTTER_LAG

Noise reduction is applied at different levels for different output streams, based on resolution. Streams at maximum recording resolution (see ACameraDevice_createCaptureSession) or below have noise reduction applied, while higher-resolution streams have MINIMAL (if supported) or no noise reduction applied (if MINIMAL is not supported.) The degree of noise reduction for low-resolution streams is tuned so that frame rate is not impacted, and the quality is equal to or better than FAST (since it is only applied to lower-resolution outputs, quality may improve from FAST).

This mode is intended to be used by applications operating in a zero-shutter-lag mode with YUV or PRIVATE reprocessing, where the application continuously captures high-resolution intermediate buffers into a circular buffer, from which a final image is produced via reprocessing when a user takes a picture. For such a use case, the high-resolution buffers must not have noise reduction applied to maximize efficiency of preview and to avoid over-applying noise filtering when reprocessing, while low-resolution buffers (used for recording or preview, generally) need noise reduction applied for reasonable preview quality.

This mode is guaranteed to be supported by devices that support either the YUV_REPROCESSING or PRIVATE_REPROCESSING capabilities (ACAMERA_REQUEST_AVAILABLE_CAPABILITIES lists either of those capabilities) and it will be the default mode for CAMERA3_TEMPLATE_ZERO_SHUTTER_LAG template.

See also: ACAMERA_REQUEST_AVAILABLE_CAPABILITIES

acamera_metadata_enum_acamera_request_available_capabilities

 acamera_metadata_enum_acamera_request_available_capabilities
Properties
ACAMERA_REQUEST_AVAILABLE_CAPABILITIES_BACKWARD_COMPATIBLE

The minimal set of capabilities that every camera device (regardless of ACAMERA_INFO_SUPPORTED_HARDWARE_LEVEL) supports.

This capability is listed by all normal devices, and indicates that the camera device has a feature set that's comparable to the baseline requirements for the older android.hardware.Camera API.

Devices with the DEPTH_OUTPUT capability might not list this capability, indicating that they support only depth measurement, not standard color output.

See also: ACAMERA_INFO_SUPPORTED_HARDWARE_LEVEL

ACAMERA_REQUEST_AVAILABLE_CAPABILITIES_BURST_CAPTURE

The camera device supports capturing high-resolution images at >= 20 frames per second, in at least the uncompressed YUV format, when post-processing settings are set to FAST. Additionally, maximum-resolution images can be captured at >= 10 frames per second. Here, 'high resolution' means at least 8 megapixels, or the maximum resolution of the device, whichever is smaller.

More specifically, this means that at least one output AIMAGE_FORMAT_YUV_420_888 size listed in ACAMERA_SCALER_AVAILABLE_STREAM_CONFIGURATIONS is larger or equal to the 'high resolution' defined above, and can be captured at at least 20 fps. For the largest AIMAGE_FORMAT_YUV_420_888 size listed in ACAMERA_SCALER_AVAILABLE_STREAM_CONFIGURATIONS, camera device can capture this size for at least 10 frames per second. Also the ACAMERA_CONTROL_AE_AVAILABLE_TARGET_FPS_RANGES entry lists at least one FPS range where the minimum FPS is >= 1 / minimumFrameDuration for the largest YUV_420_888 size.

If the device supports the AIMAGE_FORMAT_RAW10, AIMAGE_FORMAT_RAW12, then those can also be captured at the same rate as the maximum-size YUV_420_888 resolution is.

In addition, the ACAMERA_SYNC_MAX_LATENCY field is guaranted to have a value between 0 and 4, inclusive. ACAMERA_CONTROL_AE_LOCK_AVAILABLE and ACAMERA_CONTROL_AWB_LOCK_AVAILABLE are also guaranteed to be true so burst capture with these two locks ON yields consistent image output.

See also: ACAMERA_CONTROL_AE_AVAILABLE_TARGET_FPS_RANGES See also: ACAMERA_CONTROL_AE_LOCK_AVAILABLE See also: ACAMERA_CONTROL_AWB_LOCK_AVAILABLE See also: ACAMERA_SYNC_MAX_LATENCY

ACAMERA_REQUEST_AVAILABLE_CAPABILITIES_DEPTH_OUTPUT

The camera device can produce depth measurements from its field of view.

This capability requires the camera device to support the following:

  • AIMAGE_FORMAT_DEPTH16 is supported as an output format.
  • AIMAGE_FORMAT_DEPTH_POINT_CLOUD is optionally supported as an output format.
  • This camera device, and all camera devices with the same ACAMERA_LENS_FACING, will list the following calibration metadata entries in both ACameraManager_getCameraCharacteristics and ACameraCaptureSession_captureCallback_result:
    • ACAMERA_LENS_POSE_TRANSLATION
    • ACAMERA_LENS_POSE_ROTATION
    • ACAMERA_LENS_INTRINSIC_CALIBRATION
    • ACAMERA_LENS_DISTORTION
  • The ACAMERA_DEPTH_DEPTH_IS_EXCLUSIVE entry is listed by this device.
  • As of Android P, the ACAMERA_LENS_POSE_REFERENCE entry is listed by this device.
  • A LIMITED camera with only the DEPTH_OUTPUT capability does not have to support normal YUV_420_888, JPEG, and PRIV-format outputs. It only has to support the DEPTH16 format.

Generally, depth output operates at a slower frame rate than standard color capture, so the DEPTH16 and DEPTH_POINT_CLOUD formats will commonly have a stall duration that should be accounted for (see ACAMERA_DEPTH_AVAILABLE_DEPTH_STALL_DURATIONS). On a device that supports both depth and color-based output, to enable smooth preview, using a repeating burst is recommended, where a depth-output target is only included once every N frames, where N is the ratio between preview output rate and depth output rate, including depth stall time.

See also: ACAMERA_DEPTH_DEPTH_IS_EXCLUSIVE See also: ACAMERA_LENS_DISTORTION See also: ACAMERA_LENS_FACING See also: ACAMERA_LENS_INTRINSIC_CALIBRATION See also: ACAMERA_LENS_POSE_REFERENCE See also: ACAMERA_LENS_POSE_ROTATION See also: ACAMERA_LENS_POSE_TRANSLATION

ACAMERA_REQUEST_AVAILABLE_CAPABILITIES_LOGICAL_MULTI_CAMERA

The camera device is a logical camera backed by two or more physical cameras that are also exposed to the application.

This capability requires the camera device to support the following:

  • This camera device must list the following static metadata entries in CameraCharacteristics:
    • android.logicalMultiCamera.physicalIds
    • ACAMERA_LOGICAL_MULTI_CAMERA_SENSOR_SYNC_TYPE
  • The underlying physical cameras' static metadata must list the following entries, so that the application can correlate pixels from the physical streams:
    • ACAMERA_LENS_POSE_REFERENCE
    • ACAMERA_LENS_POSE_ROTATION
    • ACAMERA_LENS_POSE_TRANSLATION
    • ACAMERA_LENS_INTRINSIC_CALIBRATION
    • ACAMERA_LENS_DISTORTION
  • The SENSOR_INFO_TIMESTAMP_SOURCE of the logical device and physical devices must be the same.
  • The logical camera device must be LIMITED or higher device.

Both the logical camera device and its underlying physical devices support the mandatory stream combinations required for their device levels.

Additionally, for each guaranteed stream combination, the logical camera supports:

  • For each guaranteed stream combination, the logical camera supports replacing one logical YUV_420_888 or raw stream with two physical streams of the same size and format, each from a separate physical camera, given that the size and format are supported by both physical cameras.
  • If the logical camera doesn't advertise RAW capability, but the underlying physical cameras do, the logical camera will support guaranteed stream combinations for RAW capability, except that the RAW streams will be physical streams, each from a separate physical camera. This is usually the case when the physical cameras have different sensor sizes.

Using physical streams in place of a logical stream of the same size and format will not slow down the frame rate of the capture, as long as the minimum frame duration of the physical and logical streams are the same.

See also: ACAMERA_LENS_DISTORTION See also: ACAMERA_LENS_INTRINSIC_CALIBRATION See also: ACAMERA_LENS_POSE_REFERENCE See also: ACAMERA_LENS_POSE_ROTATION See also: ACAMERA_LENS_POSE_TRANSLATION See also: ACAMERA_LOGICAL_MULTI_CAMERA_SENSOR_SYNC_TYPE

ACAMERA_REQUEST_AVAILABLE_CAPABILITIES_MANUAL_POST_PROCESSING

The camera device post-processing stages can be manually controlled. The camera device supports basic manual control of the image post-processing stages. This means the following controls are guaranteed to be supported:

  • Manual tonemap control
    • android.tonemap.curve
    • ACAMERA_TONEMAP_MODE
    • ACAMERA_TONEMAP_MAX_CURVE_POINTS
    • ACAMERA_TONEMAP_GAMMA
    • ACAMERA_TONEMAP_PRESET_CURVE
  • Manual white balance control
    • ACAMERA_COLOR_CORRECTION_TRANSFORM
    • ACAMERA_COLOR_CORRECTION_GAINS
  • Manual lens shading map control
    • ACAMERA_SHADING_MODE
    • ACAMERA_STATISTICS_LENS_SHADING_MAP_MODE
    • ACAMERA_STATISTICS_LENS_SHADING_MAP
    • ACAMERA_LENS_INFO_SHADING_MAP_SIZE
  • Manual aberration correction control (if aberration correction is supported)
    • ACAMERA_COLOR_CORRECTION_ABERRATION_MODE
    • ACAMERA_COLOR_CORRECTION_AVAILABLE_ABERRATION_MODES
  • Auto white balance lock
    • ACAMERA_CONTROL_AWB_LOCK

If auto white balance is enabled, then the camera device will accurately report the values applied by AWB in the result.

A given camera device may also support additional post-processing controls, but this capability only covers the above list of controls.

See also: ACAMERA_COLOR_CORRECTION_ABERRATION_MODE See also: ACAMERA_COLOR_CORRECTION_AVAILABLE_ABERRATION_MODES See also: ACAMERA_COLOR_CORRECTION_GAINS See also: ACAMERA_COLOR_CORRECTION_TRANSFORM See also: ACAMERA_CONTROL_AWB_LOCK See also: ACAMERA_LENS_INFO_SHADING_MAP_SIZE See also: ACAMERA_SHADING_MODE See also: ACAMERA_STATISTICS_LENS_SHADING_MAP See also: ACAMERA_STATISTICS_LENS_SHADING_MAP_MODE See also: ACAMERA_TONEMAP_GAMMA See also: ACAMERA_TONEMAP_MAX_CURVE_POINTS See also: ACAMERA_TONEMAP_MODE See also: ACAMERA_TONEMAP_PRESET_CURVE

ACAMERA_REQUEST_AVAILABLE_CAPABILITIES_MANUAL_SENSOR

The camera device can be manually controlled (3A algorithms such as auto-exposure, and auto-focus can be bypassed). The camera device supports basic manual control of the sensor image acquisition related stages. This means the following controls are guaranteed to be supported:

  • Manual frame duration control
    • ACAMERA_SENSOR_FRAME_DURATION
    • ACAMERA_SENSOR_INFO_MAX_FRAME_DURATION
  • Manual exposure control
    • ACAMERA_SENSOR_EXPOSURE_TIME
    • ACAMERA_SENSOR_INFO_EXPOSURE_TIME_RANGE
  • Manual sensitivity control
    • ACAMERA_SENSOR_SENSITIVITY
    • ACAMERA_SENSOR_INFO_SENSITIVITY_RANGE
  • Manual lens control (if the lens is adjustable)
    • ACAMERA_LENS_*
  • Manual flash control (if a flash unit is present)
    • ACAMERA_FLASH_*
  • Manual black level locking
    • ACAMERA_BLACK_LEVEL_LOCK
  • Auto exposure lock
    • ACAMERA_CONTROL_AE_LOCK

If any of the above 3A algorithms are enabled, then the camera device will accurately report the values applied by 3A in the result.

A given camera device may also support additional manual sensor controls, but this capability only covers the above list of controls.

If this is supported, android.scaler.streamConfigurationMap will additionally return a min frame duration that is greater than zero for each supported size-format combination.

See also: ACAMERA_BLACK_LEVEL_LOCK See also: ACAMERA_CONTROL_AE_LOCK See also: ACAMERA_SENSOR_EXPOSURE_TIME See also: ACAMERA_SENSOR_FRAME_DURATION See also: ACAMERA_SENSOR_INFO_EXPOSURE_TIME_RANGE See also: ACAMERA_SENSOR_INFO_MAX_FRAME_DURATION See also: ACAMERA_SENSOR_INFO_SENSITIVITY_RANGE See also: ACAMERA_SENSOR_SENSITIVITY

ACAMERA_REQUEST_AVAILABLE_CAPABILITIES_MONOCHROME

The camera device is a monochrome camera that doesn't contain a color filter array, and the pixel values on U and V planes are all 128.

ACAMERA_REQUEST_AVAILABLE_CAPABILITIES_MOTION_TRACKING

The camera device supports the MOTION_TRACKING value for ACAMERA_CONTROL_CAPTURE_INTENT, which limits maximum exposure time to 20 ms.

This limits the motion blur of capture images, resulting in better image tracking results for use cases such as image stabilization or augmented reality.

See also: ACAMERA_CONTROL_CAPTURE_INTENT

ACAMERA_REQUEST_AVAILABLE_CAPABILITIES_RAW

The camera device supports outputting RAW buffers and metadata for interpreting them.

Devices supporting the RAW capability allow both for saving DNG files, and for direct application processing of raw sensor images.

  • RAW_SENSOR is supported as an output format.
  • The maximum available resolution for RAW_SENSOR streams will match either the value in ACAMERA_SENSOR_INFO_PIXEL_ARRAY_SIZE or ACAMERA_SENSOR_INFO_PRE_CORRECTION_ACTIVE_ARRAY_SIZE.
  • All DNG-related optional metadata entries are provided by the camera device.

See also: ACAMERA_SENSOR_INFO_PIXEL_ARRAY_SIZE See also: ACAMERA_SENSOR_INFO_PRE_CORRECTION_ACTIVE_ARRAY_SIZE

ACAMERA_REQUEST_AVAILABLE_CAPABILITIES_READ_SENSOR_SETTINGS

The camera device supports accurately reporting the sensor settings for many of the sensor controls while the built-in 3A algorithm is running. This allows reporting of sensor settings even when these settings cannot be manually changed.

The values reported for the following controls are guaranteed to be available in the CaptureResult, including when 3A is enabled:

  • Exposure control
    • ACAMERA_SENSOR_EXPOSURE_TIME
  • Sensitivity control
    • ACAMERA_SENSOR_SENSITIVITY
  • Lens controls (if the lens is adjustable)
    • ACAMERA_LENS_FOCUS_DISTANCE
    • ACAMERA_LENS_APERTURE

This capability is a subset of the MANUAL_SENSOR control capability, and will always be included if the MANUAL_SENSOR capability is available.

See also: ACAMERA_LENS_APERTURE See also: ACAMERA_LENS_FOCUS_DISTANCE See also: ACAMERA_SENSOR_EXPOSURE_TIME See also: ACAMERA_SENSOR_SENSITIVITY

acamera_metadata_enum_acamera_scaler_available_stream_configurations

 acamera_metadata_enum_acamera_scaler_available_stream_configurations

acamera_metadata_enum_acamera_scaler_cropping_type

 acamera_metadata_enum_acamera_scaler_cropping_type
Properties
ACAMERA_SCALER_CROPPING_TYPE_CENTER_ONLY

The camera device only supports centered crop regions.

ACAMERA_SCALER_CROPPING_TYPE_FREEFORM

The camera device supports arbitrarily chosen crop regions.

acamera_metadata_enum_acamera_sensor_info_color_filter_arrangement

 acamera_metadata_enum_acamera_sensor_info_color_filter_arrangement

acamera_metadata_enum_acamera_sensor_info_lens_shading_applied

 acamera_metadata_enum_acamera_sensor_info_lens_shading_applied

acamera_metadata_enum_acamera_sensor_info_timestamp_source

 acamera_metadata_enum_acamera_sensor_info_timestamp_source
Properties
ACAMERA_SENSOR_INFO_TIMESTAMP_SOURCE_REALTIME

Timestamps from ACAMERA_SENSOR_TIMESTAMP are in the same timebase as SystemClock::elapsedRealtimeNanos, and they can be compared to other timestamps using that base.

See also: ACAMERA_SENSOR_TIMESTAMP

ACAMERA_SENSOR_INFO_TIMESTAMP_SOURCE_UNKNOWN

Timestamps from ACAMERA_SENSOR_TIMESTAMP are in nanoseconds and monotonic, but can not be compared to timestamps from other subsystems (e.g. accelerometer, gyro etc.), or other instances of the same or different camera devices in the same system. Timestamps between streams and results for a single camera instance are comparable, and the timestamps for all buffers and the result metadata generated by a single capture are identical.

See also: ACAMERA_SENSOR_TIMESTAMP

acamera_metadata_enum_acamera_sensor_test_pattern_mode

 acamera_metadata_enum_acamera_sensor_test_pattern_mode
Properties
ACAMERA_SENSOR_TEST_PATTERN_MODE_COLOR_BARS

All pixel data is replaced with an 8-bar color pattern.

The vertical bars (left-to-right) are as follows:

  • 100% white
  • yellow
  • cyan
  • green
  • magenta
  • red
  • blue
  • black

In general the image would look like the following:

W Y C G M R B K
W Y C G M R B K
W Y C G M R B K
W Y C G M R B K
W Y C G M R B K
. . . . . . . .
. . . . . . . .
. . . . . . . .

(B = Blue, K = Black)

Each bar should take up 1/8 of the sensor pixel array width. When this is not possible, the bar size should be rounded down to the nearest integer and the pattern can repeat on the right side.

Each bar's height must always take up the full sensor pixel array height.

Each pixel in this test pattern must be set to either 0% intensity or 100% intensity.

ACAMERA_SENSOR_TEST_PATTERN_MODE_COLOR_BARS_FADE_TO_GRAY

The test pattern is similar to COLOR_BARS, except that each bar should start at its specified color at the top, and fade to gray at the bottom.

Furthermore each bar is further subdivided into a left and right half. The left half should have a smooth gradient, and the right half should have a quantized gradient.

In particular, the right half's should consist of blocks of the same color for 1/16th active sensor pixel array width.

The least significant bits in the quantized gradient should be copied from the most significant bits of the smooth gradient.

The height of each bar should always be a multiple of 128. When this is not the case, the pattern should repeat at the bottom of the image.

ACAMERA_SENSOR_TEST_PATTERN_MODE_CUSTOM1

The first custom test pattern. All custom patterns that are available only on this camera device are at least this numeric value.

All of the custom test patterns will be static (that is the raw image must not vary from frame to frame).

ACAMERA_SENSOR_TEST_PATTERN_MODE_OFF

No test pattern mode is used, and the camera device returns captures from the image sensor.

This is the default if the key is not set.

ACAMERA_SENSOR_TEST_PATTERN_MODE_PN9

All pixel data is replaced by a pseudo-random sequence generated from a PN9 512-bit sequence (typically implemented in hardware with a linear feedback shift register).

The generator should be reset at the beginning of each frame, and thus each subsequent raw frame with this test pattern should be exactly the same as the last.

ACAMERA_SENSOR_TEST_PATTERN_MODE_SOLID_COLOR

Each pixel in [R, G_even, G_odd, B] is replaced by its respective color channel provided in ACAMERA_SENSOR_TEST_PATTERN_DATA.

For example:

android.testPatternData = [0, 0xFFFFFFFF, 0xFFFFFFFF, 0]

All green pixels are 100% green. All red/blue pixels are black.

android.testPatternData = [0xFFFFFFFF, 0, 0xFFFFFFFF, 0]

All red pixels are 100% red. Only the odd green pixels are 100% green. All blue pixels are 100% black.

See also: ACAMERA_SENSOR_TEST_PATTERN_DATA

acamera_metadata_enum_acamera_shading_mode

 acamera_metadata_enum_acamera_shading_mode
Properties
ACAMERA_SHADING_MODE_FAST

Apply lens shading corrections, without slowing frame rate relative to sensor raw output

ACAMERA_SHADING_MODE_HIGH_QUALITY

Apply high-quality lens shading correction, at the cost of possibly reduced frame rate.

ACAMERA_SHADING_MODE_OFF

No lens shading correction is applied.

acamera_metadata_enum_acamera_statistics_face_detect_mode

 acamera_metadata_enum_acamera_statistics_face_detect_mode
Properties
ACAMERA_STATISTICS_FACE_DETECT_MODE_FULL

Return all face metadata.

In this mode, face rectangles, scores, landmarks, and face IDs are all valid.

ACAMERA_STATISTICS_FACE_DETECT_MODE_OFF

Do not include face detection statistics in capture results.

ACAMERA_STATISTICS_FACE_DETECT_MODE_SIMPLE

Return face rectangle and confidence values only.

acamera_metadata_enum_acamera_statistics_hot_pixel_map_mode

 acamera_metadata_enum_acamera_statistics_hot_pixel_map_mode
Properties
ACAMERA_STATISTICS_HOT_PIXEL_MAP_MODE_OFF

Hot pixel map production is disabled.

ACAMERA_STATISTICS_HOT_PIXEL_MAP_MODE_ON

Hot pixel map production is enabled.

acamera_metadata_enum_acamera_statistics_lens_shading_map_mode

 acamera_metadata_enum_acamera_statistics_lens_shading_map_mode
Properties
ACAMERA_STATISTICS_LENS_SHADING_MAP_MODE_OFF

Do not include a lens shading map in the capture result.

ACAMERA_STATISTICS_LENS_SHADING_MAP_MODE_ON

Include a lens shading map in the capture result.

acamera_metadata_enum_acamera_statistics_ois_data_mode

 acamera_metadata_enum_acamera_statistics_ois_data_mode
Properties
ACAMERA_STATISTICS_OIS_DATA_MODE_OFF

Do not include OIS data in the capture result.

ACAMERA_STATISTICS_OIS_DATA_MODE_ON

Include OIS data in the capture result.

ACAMERA_STATISTICS_OIS_TIMESTAMPS, ACAMERA_STATISTICS_OIS_X_SHIFTS, and ACAMERA_STATISTICS_OIS_Y_SHIFTS provide OIS data in the output result metadata.

See also: ACAMERA_STATISTICS_OIS_TIMESTAMPS See also: ACAMERA_STATISTICS_OIS_X_SHIFTS See also: ACAMERA_STATISTICS_OIS_Y_SHIFTS

acamera_metadata_enum_acamera_statistics_scene_flicker

 acamera_metadata_enum_acamera_statistics_scene_flicker
Properties
ACAMERA_STATISTICS_SCENE_FLICKER_50HZ

The camera device detects illumination flickering at 50Hz in the current scene.

ACAMERA_STATISTICS_SCENE_FLICKER_60HZ

The camera device detects illumination flickering at 60Hz in the current scene.

ACAMERA_STATISTICS_SCENE_FLICKER_NONE

The camera device does not detect any flickering illumination in the current scene.

acamera_metadata_enum_acamera_sync_frame_number

 acamera_metadata_enum_acamera_sync_frame_number
Properties
ACAMERA_SYNC_FRAME_NUMBER_CONVERGING

The current result is not yet fully synchronized to any request.

Synchronization is in progress, and reading metadata from this result may include a mix of data that have taken effect since the last synchronization time.

In some future result, within ACAMERA_SYNC_MAX_LATENCY frames, this value will update to the actual frame number frame number the result is guaranteed to be synchronized to (as long as the request settings remain constant).

See also: ACAMERA_SYNC_MAX_LATENCY

ACAMERA_SYNC_FRAME_NUMBER_UNKNOWN

The current result's synchronization status is unknown.

The result may have already converged, or it may be in progress. Reading from this result may include some mix of settings from past requests.

After a settings change, the new settings will eventually all take effect for the output buffers and results. However, this value will not change when that happens. Altering settings rapidly may provide outcomes using mixes of settings from recent requests.

This value is intended primarily for backwards compatibility with the older camera implementations (for android.hardware.Camera).

acamera_metadata_enum_acamera_sync_max_latency

 acamera_metadata_enum_acamera_sync_max_latency
Properties
ACAMERA_SYNC_MAX_LATENCY_PER_FRAME_CONTROL

Every frame has the requests immediately applied.

Changing controls over multiple requests one after another will produce results that have those controls applied atomically each frame.

All FULL capability devices will have this as their maxLatency.

ACAMERA_SYNC_MAX_LATENCY_UNKNOWN

Each new frame has some subset (potentially the entire set) of the past requests applied to the camera settings.

By submitting a series of identical requests, the camera device will eventually have the camera settings applied, but it is unknown when that exact point will be.

All LEGACY capability devices will have this as their maxLatency.

acamera_metadata_enum_acamera_tonemap_mode

 acamera_metadata_enum_acamera_tonemap_mode
Properties
ACAMERA_TONEMAP_MODE_CONTRAST_CURVE

Use the tone mapping curve specified in the ACAMERA_TONEMAPCURVE_* entries.

All color enhancement and tonemapping must be disabled, except for applying the tonemapping curve specified by android.tonemap.curve.

Must not slow down frame rate relative to raw sensor output.

ACAMERA_TONEMAP_MODE_FAST

Advanced gamma mapping and color enhancement may be applied, without reducing frame rate compared to raw sensor output.

ACAMERA_TONEMAP_MODE_GAMMA_VALUE

Use the gamma value specified in ACAMERA_TONEMAP_GAMMA to peform tonemapping.

All color enhancement and tonemapping must be disabled, except for applying the tonemapping curve specified by ACAMERA_TONEMAP_GAMMA.

Must not slow down frame rate relative to raw sensor output.

See also: ACAMERA_TONEMAP_GAMMA

ACAMERA_TONEMAP_MODE_HIGH_QUALITY

High-quality gamma mapping and color enhancement will be applied, at the cost of possibly reduced frame rate compared to raw sensor output.

ACAMERA_TONEMAP_MODE_PRESET_CURVE

Use the preset tonemapping curve specified in ACAMERA_TONEMAP_PRESET_CURVE to peform tonemapping.

All color enhancement and tonemapping must be disabled, except for applying the tonemapping curve specified by ACAMERA_TONEMAP_PRESET_CURVE.

Must not slow down frame rate relative to raw sensor output.

See also: ACAMERA_TONEMAP_PRESET_CURVE

acamera_metadata_enum_acamera_tonemap_preset_curve

 acamera_metadata_enum_acamera_tonemap_preset_curve
Properties
ACAMERA_TONEMAP_PRESET_CURVE_REC709

Tonemapping curve is defined by ITU-R BT.709

ACAMERA_TONEMAP_PRESET_CURVE_SRGB

Tonemapping curve is defined by sRGB

acamera_metadata_tag

 acamera_metadata_tag

Main enum for camera metadata tags.

Properties
ACAMERA_BLACK_LEVEL_END
ACAMERA_BLACK_LEVEL_LOCK

Whether black-level compensation is locked to its current values, or is free to vary.

Type: byte (acamera_metadata_enum_android_black_level_lock_t)

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

Whether the black level offset was locked for this frame. Should be ON if ACAMERA_BLACK_LEVEL_LOCK was ON in the capture request, unless a change in other capture settings forced the camera device to perform a black level reset.

See also: ACAMERA_BLACK_LEVEL_LOCK

ACAMERA_COLOR_CORRECTION_ABERRATION_MODE

Mode of operation for the chromatic aberration correction algorithm.

Type: byte (acamera_metadata_enum_android_color_correction_aberration_mode_t)

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

Chromatic (color) aberration is caused by the fact that different wavelengths of light can not focus on the same point after exiting from the lens. This metadata defines the high level control of chromatic aberration correction algorithm, which aims to minimize the chromatic artifacts that may occur along the object boundaries in an image.

FAST/HIGH_QUALITY both mean that camera device determined aberration correction will be applied. HIGH_QUALITY mode indicates that the camera device will use the highest-quality aberration correction algorithms, even if it slows down capture rate. FAST means the camera device will not slow down capture rate when applying aberration correction.

LEGACY devices will always be in FAST mode.

ACAMERA_COLOR_CORRECTION_AVAILABLE_ABERRATION_MODES

List of aberration correction modes for ACAMERA_COLOR_CORRECTION_ABERRATION_MODE that are supported by this camera device.

See also: ACAMERA_COLOR_CORRECTION_ABERRATION_MODE

Type: byte[n]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

This key lists the valid modes for ACAMERA_COLOR_CORRECTION_ABERRATION_MODE. If no aberration correction modes are available for a device, this list will solely include OFF mode. All camera devices will support either OFF or FAST mode.

Camera devices that support the MANUAL_POST_PROCESSING capability will always list OFF mode. This includes all FULL level devices.

LEGACY devices will always only support FAST mode.

See also: ACAMERA_COLOR_CORRECTION_ABERRATION_MODE

ACAMERA_COLOR_CORRECTION_END
ACAMERA_COLOR_CORRECTION_GAINS

Gains applying to Bayer raw color channels for white-balance.

Type: float[4]

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

These per-channel gains are either set by the camera device when the request ACAMERA_COLOR_CORRECTION_MODE is not TRANSFORM_MATRIX, or directly by the application in the request when the ACAMERA_COLOR_CORRECTION_MODE is TRANSFORM_MATRIX.

The gains in the result metadata are the gains actually applied by the camera device to the current frame.

The valid range of gains varies on different devices, but gains between [1.0, 3.0] are guaranteed not to be clipped. Even if a given device allows gains below 1.0, this is usually not recommended because this can create color artifacts.

See also: ACAMERA_COLOR_CORRECTION_MODE

ACAMERA_COLOR_CORRECTION_MODE

The mode control selects how the image data is converted from the sensor's native color into linear sRGB color.

Type: byte (acamera_metadata_enum_android_color_correction_mode_t)

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

When auto-white balance (AWB) is enabled with ACAMERA_CONTROL_AWB_MODE, this control is overridden by the AWB routine. When AWB is disabled, the application controls how the color mapping is performed.

We define the expected processing pipeline below. For consistency across devices, this is always the case with TRANSFORM_MATRIX.

When either FULL or HIGH_QUALITY is used, the camera device may do additional processing but ACAMERA_COLOR_CORRECTION_GAINS and ACAMERA_COLOR_CORRECTION_TRANSFORM will still be provided by the camera device (in the results) and be roughly correct.

Switching to TRANSFORM_MATRIX and using the data provided from FAST or HIGH_QUALITY will yield a picture with the same white point as what was produced by the camera device in the earlier frame.

The expected processing pipeline is as follows:

The white balance is encoded by two values, a 4-channel white-balance gain vector (applied in the Bayer domain), and a 3x3 color transform matrix (applied after demosaic).

The 4-channel white-balance gains are defined as:

ACAMERA_COLOR_CORRECTION_GAINS = [ R G_even G_odd B ]

where G_even is the gain for green pixels on even rows of the output, and G_odd is the gain for green pixels on the odd rows. These may be identical for a given camera device implementation; if the camera device does not support a separate gain for even/odd green channels, it will use the G_even value, and write G_odd equal to G_even in the output result metadata.

The matrices for color transforms are defined as a 9-entry vector:

ACAMERA_COLOR_CORRECTION_TRANSFORM = [ I0 I1 I2 I3 I4 I5 I6 I7 I8 ]

which define a transform from input sensor colors, P_in = [ r g b ], to output linear sRGB, P_out = [ r' g' b' ],

with colors as follows:

r' = I0r + I1g + I2b
g' = I3r + I4g + I5b
b' = I6r + I7g + I8b

Both the input and output value ranges must match. Overflow/underflow values are clipped to fit within the range.

See also: ACAMERA_COLOR_CORRECTION_GAINS See also: ACAMERA_COLOR_CORRECTION_TRANSFORM See also: ACAMERA_CONTROL_AWB_MODE

ACAMERA_COLOR_CORRECTION_TRANSFORM

A color transform matrix to use to transform from sensor RGB color space to output linear sRGB color space.

Type: rational[3*3]

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

This matrix is either set by the camera device when the request ACAMERA_COLOR_CORRECTION_MODE is not TRANSFORM_MATRIX, or directly by the application in the request when the ACAMERA_COLOR_CORRECTION_MODE is TRANSFORM_MATRIX.

In the latter case, the camera device may round the matrix to account for precision issues; the final rounded matrix should be reported back in this matrix result metadata. The transform should keep the magnitude of the output color values within [0, 1.0] (assuming input color values is within the normalized range [0, 1.0]), or clipping may occur.

The valid range of each matrix element varies on different devices, but values within [-1.5, 3.0] are guaranteed not to be clipped.

See also: ACAMERA_COLOR_CORRECTION_MODE

ACAMERA_CONTROL_AE_ANTIBANDING_MODE

The desired setting for the camera device's auto-exposure algorithm's antibanding compensation.

Type: byte (acamera_metadata_enum_android_control_ae_antibanding_mode_t)

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

Some kinds of lighting fixtures, such as some fluorescent lights, flicker at the rate of the power supply frequency (60Hz or 50Hz, depending on country). While this is typically not noticeable to a person, it can be visible to a camera device. If a camera sets its exposure time to the wrong value, the flicker may become visible in the viewfinder as flicker or in a final captured image, as a set of variable-brightness bands across the image.

Therefore, the auto-exposure routines of camera devices include antibanding routines that ensure that the chosen exposure value will not cause such banding. The choice of exposure time depends on the rate of flicker, which the camera device can detect automatically, or the expected rate can be selected by the application using this control.

A given camera device may not support all of the possible options for the antibanding mode. The ACAMERA_CONTROL_AE_AVAILABLE_ANTIBANDING_MODES key contains the available modes for a given camera device.

AUTO mode is the default if it is available on given camera device. When AUTO mode is not available, the default will be either 50HZ or 60HZ, and both 50HZ and 60HZ will be available.

If manual exposure control is enabled (by setting ACAMERA_CONTROL_AE_MODE or ACAMERA_CONTROL_MODE to OFF), then this setting has no effect, and the application must ensure it selects exposure times that do not cause banding issues. The ACAMERA_STATISTICS_SCENE_FLICKER key can assist the application in this.

See also: ACAMERA_CONTROL_AE_AVAILABLE_ANTIBANDING_MODES See also: ACAMERA_CONTROL_AE_MODE See also: ACAMERA_CONTROL_MODE See also: ACAMERA_STATISTICS_SCENE_FLICKER

ACAMERA_CONTROL_AE_AVAILABLE_ANTIBANDING_MODES

List of auto-exposure antibanding modes for ACAMERA_CONTROL_AE_ANTIBANDING_MODE that are supported by this camera device.

See also: ACAMERA_CONTROL_AE_ANTIBANDING_MODE

Type: byte[n]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

Not all of the auto-exposure anti-banding modes may be supported by a given camera device. This field lists the valid anti-banding modes that the application may request for this camera device with the ACAMERA_CONTROL_AE_ANTIBANDING_MODE control.

See also: ACAMERA_CONTROL_AE_ANTIBANDING_MODE

ACAMERA_CONTROL_AE_AVAILABLE_MODES

List of auto-exposure modes for ACAMERA_CONTROL_AE_MODE that are supported by this camera device.

See also: ACAMERA_CONTROL_AE_MODE

Type: byte[n]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

Not all the auto-exposure modes may be supported by a given camera device, especially if no flash unit is available. This entry lists the valid modes for ACAMERA_CONTROL_AE_MODE for this camera device.

All camera devices support ON, and all camera devices with flash units support ON_AUTO_FLASH and ON_ALWAYS_FLASH.

FULL mode camera devices always support OFF mode, which enables application control of camera exposure time, sensitivity, and frame duration.

LEGACY mode camera devices never support OFF mode. LIMITED mode devices support OFF if they support the MANUAL_SENSOR capability.

See also: ACAMERA_CONTROL_AE_MODE

ACAMERA_CONTROL_AE_AVAILABLE_TARGET_FPS_RANGES

List of frame rate ranges for ACAMERA_CONTROL_AE_TARGET_FPS_RANGE supported by this camera device.

See also: ACAMERA_CONTROL_AE_TARGET_FPS_RANGE

Type: int32[2*n]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

For devices at the LEGACY level or above:

For devices at the LIMITED level or above:

  • For YUV_420_888 burst capture use case, this list will always include (min, max) and (max, max) where min <= 15 and max = the maximum output frame rate of the maximum YUV_420_888 output size.

ACAMERA_CONTROL_AE_COMPENSATION_RANGE

Maximum and minimum exposure compensation values for ACAMERA_CONTROL_AE_EXPOSURE_COMPENSATION, in counts of ACAMERA_CONTROL_AE_COMPENSATION_STEP, that are supported by this camera device.

See also: ACAMERA_CONTROL_AE_COMPENSATION_STEP See also: ACAMERA_CONTROL_AE_EXPOSURE_COMPENSATION

Type: int32[2]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

ACAMERA_CONTROL_AE_COMPENSATION_STEP

Smallest step by which the exposure compensation can be changed.

Type: rational

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

This is the unit for ACAMERA_CONTROL_AE_EXPOSURE_COMPENSATION. For example, if this key has a value of 1/2, then a setting of -2 for ACAMERA_CONTROL_AE_EXPOSURE_COMPENSATION means that the target EV offset for the auto-exposure routine is -1 EV.

One unit of EV compensation changes the brightness of the captured image by a factor of two. +1 EV doubles the image brightness, while -1 EV halves the image brightness.

See also: ACAMERA_CONTROL_AE_EXPOSURE_COMPENSATION

ACAMERA_CONTROL_AE_EXPOSURE_COMPENSATION

Adjustment to auto-exposure (AE) target image brightness.

Type: int32

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

The adjustment is measured as a count of steps, with the step size defined by ACAMERA_CONTROL_AE_COMPENSATION_STEP and the allowed range by ACAMERA_CONTROL_AE_COMPENSATION_RANGE.

For example, if the exposure value (EV) step is 0.333, '6' will mean an exposure compensation of +2 EV; -3 will mean an exposure compensation of -1 EV. One EV represents a doubling of image brightness. Note that this control will only be effective if ACAMERA_CONTROL_AE_MODE != OFF. This control will take effect even when ACAMERA_CONTROL_AE_LOCK == true.

In the event of exposure compensation value being changed, camera device may take several frames to reach the newly requested exposure target. During that time, ACAMERA_CONTROL_AE_STATE field will be in the SEARCHING state. Once the new exposure target is reached, ACAMERA_CONTROL_AE_STATE will change from SEARCHING to either CONVERGED, LOCKED (if AE lock is enabled), or FLASH_REQUIRED (if the scene is too dark for still capture).

See also: ACAMERA_CONTROL_AE_COMPENSATION_RANGE See also: ACAMERA_CONTROL_AE_COMPENSATION_STEP See also: ACAMERA_CONTROL_AE_LOCK See also: ACAMERA_CONTROL_AE_MODE See also: ACAMERA_CONTROL_AE_STATE

ACAMERA_CONTROL_AE_LOCK

Whether auto-exposure (AE) is currently locked to its latest calculated values.

Type: byte (acamera_metadata_enum_android_control_ae_lock_t)

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

When set to true (ON), the AE algorithm is locked to its latest parameters, and will not change exposure settings until the lock is set to false (OFF).

Note that even when AE is locked, the flash may be fired if the ACAMERA_CONTROL_AE_MODE is ON_AUTO_FLASH / ON_ALWAYS_FLASH / ON_AUTO_FLASH_REDEYE.

When ACAMERA_CONTROL_AE_EXPOSURE_COMPENSATION is changed, even if the AE lock is ON, the camera device will still adjust its exposure value.

If AE precapture is triggered (see ACAMERA_CONTROL_AE_PRECAPTURE_TRIGGER) when AE is already locked, the camera device will not change the exposure time (ACAMERA_SENSOR_EXPOSURE_TIME) and sensitivity (ACAMERA_SENSOR_SENSITIVITY) parameters. The flash may be fired if the ACAMERA_CONTROL_AE_MODE is ON_AUTO_FLASH/ON_AUTO_FLASH_REDEYE and the scene is too dark. If the ACAMERA_CONTROL_AE_MODE is ON_ALWAYS_FLASH, the scene may become overexposed. Similarly, AE precapture trigger CANCEL has no effect when AE is already locked.

When an AE precapture sequence is triggered, AE unlock will not be able to unlock the AE if AE is locked by the camera device internally during precapture metering sequence In other words, submitting requests with AE unlock has no effect for an ongoing precapture metering sequence. Otherwise, the precapture metering sequence will never succeed in a sequence of preview requests where AE lock is always set to false.

Since the camera device has a pipeline of in-flight requests, the settings that get locked do not necessarily correspond to the settings that were present in the latest capture result received from the camera device, since additional captures and AE updates may have occurred even before the result was sent out. If an application is switching between automatic and manual control and wishes to eliminate any flicker during the switch, the following procedure is recommended:

  1. Starting in auto-AE mode:
  2. Lock AE
  3. Wait for the first result to be output that has the AE locked
  4. Copy exposure settings from that result into a request, set the request to manual AE
  5. Submit the capture request, proceed to run manual AE as desired.

See ACAMERA_CONTROL_AE_STATE for AE lock related state transition details.

See also: ACAMERA_CONTROL_AE_EXPOSURE_COMPENSATION See also: ACAMERA_CONTROL_AE_MODE See also: ACAMERA_CONTROL_AE_PRECAPTURE_TRIGGER See also: ACAMERA_CONTROL_AE_STATE See also: ACAMERA_SENSOR_EXPOSURE_TIME See also: ACAMERA_SENSOR_SENSITIVITY

ACAMERA_CONTROL_AE_LOCK_AVAILABLE

Whether the camera device supports ACAMERA_CONTROL_AE_LOCK

See also: ACAMERA_CONTROL_AE_LOCK

Type: byte (acamera_metadata_enum_android_control_ae_lock_available_t)

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

Devices with MANUAL_SENSOR capability or BURST_CAPTURE capability will always list true. This includes FULL devices.

ACAMERA_CONTROL_AE_MODE

The desired mode for the camera device's auto-exposure routine.

Type: byte (acamera_metadata_enum_android_control_ae_mode_t)

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

This control is only effective if ACAMERA_CONTROL_MODE is AUTO.

When set to any of the ON modes, the camera device's auto-exposure routine is enabled, overriding the application's selected exposure time, sensor sensitivity, and frame duration (ACAMERA_SENSOR_EXPOSURE_TIME, ACAMERA_SENSOR_SENSITIVITY, and ACAMERA_SENSOR_FRAME_DURATION). If one of the FLASH modes is selected, the camera device's flash unit controls are also overridden.

The FLASH modes are only available if the camera device has a flash unit (ACAMERA_FLASH_INFO_AVAILABLE is true).

If flash TORCH mode is desired, this field must be set to ON or OFF, and ACAMERA_FLASH_MODE set to TORCH.

When set to any of the ON modes, the values chosen by the camera device auto-exposure routine for the overridden fields for a given capture will be available in its CaptureResult.

See also: ACAMERA_CONTROL_MODE See also: ACAMERA_FLASH_INFO_AVAILABLE See also: ACAMERA_FLASH_MODE See also: ACAMERA_SENSOR_EXPOSURE_TIME See also: ACAMERA_SENSOR_FRAME_DURATION See also: ACAMERA_SENSOR_SENSITIVITY

ACAMERA_CONTROL_AE_PRECAPTURE_TRIGGER

Whether the camera device will trigger a precapture metering sequence when it processes this request.

Type: byte (acamera_metadata_enum_android_control_ae_precapture_trigger_t)

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

This entry is normally set to IDLE, or is not included at all in the request settings. When included and set to START, the camera device will trigger the auto-exposure (AE) precapture metering sequence.

When set to CANCEL, the camera device will cancel any active precapture metering trigger, and return to its initial AE state. If a precapture metering sequence is already completed, and the camera device has implicitly locked the AE for subsequent still capture, the CANCEL trigger will unlock the AE and return to its initial AE state.

The precapture sequence should be triggered before starting a high-quality still capture for final metering decisions to be made, and for firing pre-capture flash pulses to estimate scene brightness and required final capture flash power, when the flash is enabled.

Normally, this entry should be set to START for only a single request, and the application should wait until the sequence completes before starting a new one.

When a precapture metering sequence is finished, the camera device may lock the auto-exposure routine internally to be able to accurately expose the subsequent still capture image (ACAMERA_CONTROL_CAPTURE_INTENT == STILL_CAPTURE). For this case, the AE may not resume normal scan if no subsequent still capture is submitted. To ensure that the AE routine restarts normal scan, the application should submit a request with ACAMERA_CONTROL_AE_LOCK == true, followed by a request with ACAMERA_CONTROL_AE_LOCK == false, if the application decides not to submit a still capture request after the precapture sequence completes. Alternatively, for API level 23 or newer devices, the CANCEL can be used to unlock the camera device internally locked AE if the application doesn't submit a still capture request after the AE precapture trigger. Note that, the CANCEL was added in API level 23, and must not be used in devices that have earlier API levels.

The exact effect of auto-exposure (AE) precapture trigger depends on the current AE mode and state; see ACAMERA_CONTROL_AE_STATE for AE precapture state transition details.

On LEGACY-level devices, the precapture trigger is not supported; capturing a high-resolution JPEG image will automatically trigger a precapture sequence before the high-resolution capture, including potentially firing a pre-capture flash.

Using the precapture trigger and the auto-focus trigger ACAMERA_CONTROL_AF_TRIGGER simultaneously is allowed. However, since these triggers often require cooperation between the auto-focus and auto-exposure routines (for example, the may need to be enabled for a focus sweep), the camera device may delay acting on a later trigger until the previous trigger has been fully handled. This may lead to longer intervals between the trigger and changes to ACAMERA_CONTROL_AE_STATE indicating the start of the precapture sequence, for example.

If both the precapture and the auto-focus trigger are activated on the same request, then the camera device will complete them in the optimal order for that device.

See also: ACAMERA_CONTROL_AE_LOCK See also: ACAMERA_CONTROL_AE_STATE See also: ACAMERA_CONTROL_AF_TRIGGER See also: ACAMERA_CONTROL_CAPTURE_INTENT

ACAMERA_CONTROL_AE_REGIONS

List of metering areas to use for auto-exposure adjustment.

Type: int32[5*area_count]

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

Not available if android.control.maxRegionsAe is 0. Otherwise will always be present.

The maximum number of regions supported by the device is determined by the value of android.control.maxRegionsAe.

The coordinate system is based on the active pixel array, with (0,0) being the top-left pixel in the active pixel array, and (ACAMERA_SENSOR_INFO_ACTIVE_ARRAY_SIZE.width - 1, ACAMERA_SENSOR_INFO_ACTIVE_ARRAY_SIZE.height - 1) being the bottom-right pixel in the active pixel array.

The weight must be within [0, 1000], and represents a weight for every pixel in the area. This means that a large metering area with the same weight as a smaller area will have more effect in the metering result. Metering areas can partially overlap and the camera device will add the weights in the overlap region.

The weights are relative to weights of other exposure metering regions, so if only one region is used, all non-zero weights will have the same effect. A region with 0 weight is ignored.

If all regions have 0 weight, then no specific metering area needs to be used by the camera device.

If the metering region is outside the used ACAMERA_SCALER_CROP_REGION returned in capture result metadata, the camera device will ignore the sections outside the crop region and output only the intersection rectangle as the metering region in the result metadata. If the region is entirely outside the crop region, it will be ignored and not reported in the result metadata.

The data representation is int[5 * area_count]. Every five elements represent a metering region of (xmin, ymin, xmax, ymax, weight). The rectangle is defined to be inclusive on xmin and ymin, but exclusive on xmax and ymax.

See also: ACAMERA_SCALER_CROP_REGION See also: ACAMERA_SENSOR_INFO_ACTIVE_ARRAY_SIZE

ACAMERA_CONTROL_AE_STATE

Current state of the auto-exposure (AE) algorithm.

Type: byte (acamera_metadata_enum_android_control_ae_state_t)

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks

Switching between or enabling AE modes (ACAMERA_CONTROL_AE_MODE) always resets the AE state to INACTIVE. Similarly, switching between ACAMERA_CONTROL_MODE, or ACAMERA_CONTROL_SCENE_MODE if ACAMERA_CONTROL_MODE == USE_SCENE_MODE resets all the algorithm states to INACTIVE.

The camera device can do several state transitions between two results, if it is allowed by the state transition table. For example: INACTIVE may never actually be seen in a result.

The state in the result is the state for this image (in sync with this image): if AE state becomes CONVERGED, then the image data associated with this result should be good to use.

Below are state transition tables for different AE modes.

State Transition Cause New State Notes
INACTIVE INACTIVE Camera device auto exposure algorithm is disabled

When ACAMERA_CONTROL_AE_MODE is AE_MODE_ON*:

State Transition Cause New State Notes
INACTIVE Camera device initiates AE scan SEARCHING Values changing
INACTIVE ACAMERA_CONTROL_AE_LOCK is ON LOCKED Values locked
SEARCHING Camera device finishes AE scan CONVERGED Good values, not changing
SEARCHING Camera device finishes AE scan FLASH_REQUIRED Converged but too dark w/o flash
SEARCHING ACAMERA_CONTROL_AE_LOCK is ON LOCKED Values locked
CONVERGED Camera device initiates AE scan SEARCHING Values changing
CONVERGED ACAMERA_CONTROL_AE_LOCK is ON LOCKED Values locked
FLASH_REQUIRED Camera device initiates AE scan SEARCHING Values changing
FLASH_REQUIRED ACAMERA_CONTROL_AE_LOCK is ON LOCKED Values locked
LOCKED ACAMERA_CONTROL_AE_LOCK is OFF SEARCHING Values not good after unlock
LOCKED ACAMERA_CONTROL_AE_LOCK is OFF CONVERGED Values good after unlock
LOCKED ACAMERA_CONTROL_AE_LOCK is OFF FLASH_REQUIRED Exposure good, but too dark
PRECAPTURE Sequence done. ACAMERA_CONTROL_AE_LOCK is OFF CONVERGED Ready for high-quality capture
PRECAPTURE Sequence done. ACAMERA_CONTROL_AE_LOCK is ON LOCKED Ready for high-quality capture
LOCKED aeLock is ON and aePrecaptureTrigger is START LOCKED Precapture trigger is ignored when AE is already locked
LOCKED aeLock is ON and aePrecaptureTrigger is CANCEL LOCKED Precapture trigger is ignored when AE is already locked
Any state (excluding LOCKED) ACAMERA_CONTROL_AE_PRECAPTURE_TRIGGER is START PRECAPTURE Start AE precapture metering sequence
Any state (excluding LOCKED) ACAMERA_CONTROL_AE_PRECAPTURE_TRIGGER is CANCEL INACTIVE Currently active precapture metering sequence is canceled

If the camera device supports AE external flash mode (ON_EXTERNAL_FLASH is included in ACAMERA_CONTROL_AE_AVAILABLE_MODES), ACAMERA_CONTROL_AE_STATE must be FLASH_REQUIRED after the camera device finishes AE scan and it's too dark without flash.

For the above table, the camera device may skip reporting any state changes that happen without application intervention (i.e. mode switch, trigger, locking). Any state that can be skipped in that manner is called a transient state.

For example, for above AE modes (AE_MODE_ON*), in addition to the state transitions listed in above table, it is also legal for the camera device to skip one or more transient states between two results. See below table for examples:

State Transition Cause New State Notes
INACTIVE Camera device finished AE scan CONVERGED Values are already good, transient states are skipped by camera device.
Any state (excluding LOCKED) ACAMERA_CONTROL_AE_PRECAPTURE_TRIGGER is START, sequence done FLASH_REQUIRED Converged but too dark w/o flash after a precapture sequence, transient states are skipped by camera device.
Any state (excluding LOCKED) ACAMERA_CONTROL_AE_PRECAPTURE_TRIGGER is START, sequence done CONVERGED Converged after a precapture sequence, transient states are skipped by camera device.
Any state (excluding LOCKED) ACAMERA_CONTROL_AE_PRECAPTURE_TRIGGER is CANCEL, converged FLASH_REQUIRED Converged but too dark w/o flash after a precapture sequence is canceled, transient states are skipped by camera device.
Any state (excluding LOCKED) ACAMERA_CONTROL_AE_PRECAPTURE_TRIGGER is CANCEL, converged CONVERGED Converged after a precapture sequenceis canceled, transient states are skipped by camera device.
CONVERGED Camera device finished AE scan FLASH_REQUIRED Converged but too dark w/o flash after a new scan, transient states are skipped by camera device.
FLASH_REQUIRED Camera device finished AE scan CONVERGED Converged after a new scan, transient states are skipped by camera device.
See also: ACAMERA_CONTROL_AE_AVAILABLE_MODES See also: ACAMERA_CONTROL_AE_LOCK See also: ACAMERA_CONTROL_AE_MODE See also: ACAMERA_CONTROL_AE_PRECAPTURE_TRIGGER See also: ACAMERA_CONTROL_AE_STATE See also: ACAMERA_CONTROL_MODE See also: ACAMERA_CONTROL_SCENE_MODE

ACAMERA_CONTROL_AE_TARGET_FPS_RANGE

Range over which the auto-exposure routine can adjust the capture frame rate to maintain good exposure.

Type: int32[2]

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

Only constrains auto-exposure (AE) algorithm, not manual control of ACAMERA_SENSOR_EXPOSURE_TIME and ACAMERA_SENSOR_FRAME_DURATION.

See also: ACAMERA_SENSOR_EXPOSURE_TIME See also: ACAMERA_SENSOR_FRAME_DURATION

ACAMERA_CONTROL_AF_AVAILABLE_MODES

List of auto-focus (AF) modes for ACAMERA_CONTROL_AF_MODE that are supported by this camera device.

See also: ACAMERA_CONTROL_AF_MODE

Type: byte[n]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

Not all the auto-focus modes may be supported by a given camera device. This entry lists the valid modes for ACAMERA_CONTROL_AF_MODE for this camera device.

All LIMITED and FULL mode camera devices will support OFF mode, and all camera devices with adjustable focuser units (ACAMERA_LENS_INFO_MINIMUM_FOCUS_DISTANCE > 0) will support AUTO mode.

LEGACY devices will support OFF mode only if they support focusing to infinity (by also setting ACAMERA_LENS_FOCUS_DISTANCE to 0.0f).

See also: ACAMERA_CONTROL_AF_MODE See also: ACAMERA_LENS_FOCUS_DISTANCE See also: ACAMERA_LENS_INFO_MINIMUM_FOCUS_DISTANCE

ACAMERA_CONTROL_AF_MODE

Whether auto-focus (AF) is currently enabled, and what mode it is set to.

Type: byte (acamera_metadata_enum_android_control_af_mode_t)

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

Only effective if ACAMERA_CONTROL_MODE = AUTO and the lens is not fixed focus (i.e. ACAMERA_LENS_INFO_MINIMUM_FOCUS_DISTANCE > 0). Also note that when ACAMERA_CONTROL_AE_MODE is OFF, the behavior of AF is device dependent. It is recommended to lock AF by using ACAMERA_CONTROL_AF_TRIGGER before setting ACAMERA_CONTROL_AE_MODE to OFF, or set AF mode to OFF when AE is OFF.

If the lens is controlled by the camera device auto-focus algorithm, the camera device will report the current AF status in ACAMERA_CONTROL_AF_STATE in result metadata.

See also: ACAMERA_CONTROL_AE_MODE See also: ACAMERA_CONTROL_AF_STATE See also: ACAMERA_CONTROL_AF_TRIGGER See also: ACAMERA_CONTROL_MODE See also: ACAMERA_LENS_INFO_MINIMUM_FOCUS_DISTANCE

ACAMERA_CONTROL_AF_REGIONS

List of metering areas to use for auto-focus.

Type: int32[5*area_count]

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

Not available if android.control.maxRegionsAf is 0. Otherwise will always be present.

The maximum number of focus areas supported by the device is determined by the value of android.control.maxRegionsAf.

The coordinate system is based on the active pixel array, with (0,0) being the top-left pixel in the active pixel array, and (ACAMERA_SENSOR_INFO_ACTIVE_ARRAY_SIZE.width - 1, ACAMERA_SENSOR_INFO_ACTIVE_ARRAY_SIZE.height - 1) being the bottom-right pixel in the active pixel array.

The weight must be within [0, 1000], and represents a weight for every pixel in the area. This means that a large metering area with the same weight as a smaller area will have more effect in the metering result. Metering areas can partially overlap and the camera device will add the weights in the overlap region.

The weights are relative to weights of other metering regions, so if only one region is used, all non-zero weights will have the same effect. A region with 0 weight is ignored.

If all regions have 0 weight, then no specific metering area needs to be used by the camera device. The capture result will either be a zero weight region as well, or the region selected by the camera device as the focus area of interest.

If the metering region is outside the used ACAMERA_SCALER_CROP_REGION returned in capture result metadata, the camera device will ignore the sections outside the crop region and output only the intersection rectangle as the metering region in the result metadata. If the region is entirely outside the crop region, it will be ignored and not reported in the result metadata.

The data representation is int[5 * area_count]. Every five elements represent a metering region of (xmin, ymin, xmax, ymax, weight). The rectangle is defined to be inclusive on xmin and ymin, but exclusive on xmax and ymax.

See also: ACAMERA_SCALER_CROP_REGION See also: ACAMERA_SENSOR_INFO_ACTIVE_ARRAY_SIZE

ACAMERA_CONTROL_AF_SCENE_CHANGE

Whether a significant scene change is detected within the currently-set AF region(s).

Type: byte (acamera_metadata_enum_android_control_af_scene_change_t)

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks

When the camera focus routine detects a change in the scene it is looking at, such as a large shift in camera viewpoint, significant motion in the scene, or a significant illumination change, this value will be set to DETECTED for a single capture result. Otherwise the value will be NOT_DETECTED. The threshold for detection is similar to what would trigger a new passive focus scan to begin in CONTINUOUS autofocus modes.

This key will be available if the camera device advertises this key via ACAMERA_REQUEST_AVAILABLE_RESULT_KEYS.

ACAMERA_CONTROL_AF_STATE

Current state of auto-focus (AF) algorithm.

Type: byte (acamera_metadata_enum_android_control_af_state_t)

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks

Switching between or enabling AF modes (ACAMERA_CONTROL_AF_MODE) always resets the AF state to INACTIVE. Similarly, switching between ACAMERA_CONTROL_MODE, or ACAMERA_CONTROL_SCENE_MODE if ACAMERA_CONTROL_MODE == USE_SCENE_MODE resets all the algorithm states to INACTIVE.

The camera device can do several state transitions between two results, if it is allowed by the state transition table. For example: INACTIVE may never actually be seen in a result.

The state in the result is the state for this image (in sync with this image): if AF state becomes FOCUSED, then the image data associated with this result should be sharp.

Below are state transition tables for different AF modes.

When ACAMERA_CONTROL_AF_MODE is AF_MODE_OFF or AF_MODE_EDOF:

State Transition Cause New State Notes
INACTIVE INACTIVE Never changes

When ACAMERA_CONTROL_AF_MODE is AF_MODE_AUTO or AF_MODE_MACRO:

State Transition Cause New State Notes
INACTIVE AF_TRIGGER ACTIVE_SCAN Start AF sweep, Lens now moving
ACTIVE_SCAN AF sweep done FOCUSED_LOCKED Focused, Lens now locked
ACTIVE_SCAN AF sweep done NOT_FOCUSED_LOCKED Not focused, Lens now locked
ACTIVE_SCAN AF_CANCEL INACTIVE Cancel/reset AF, Lens now locked
FOCUSED_LOCKED AF_CANCEL INACTIVE Cancel/reset AF
FOCUSED_LOCKED AF_TRIGGER ACTIVE_SCAN Start new sweep, Lens now moving
NOT_FOCUSED_LOCKED AF_CANCEL INACTIVE Cancel/reset AF
NOT_FOCUSED_LOCKED AF_TRIGGER ACTIVE_SCAN Start new sweep, Lens now moving
Any state Mode change INACTIVE

For the above table, the camera device may skip reporting any state changes that happen without application intervention (i.e. mode switch, trigger, locking). Any state that can be skipped in that manner is called a transient state.

For example, for these AF modes (AF_MODE_AUTO and AF_MODE_MACRO), in addition to the state transitions listed in above table, it is also legal for the camera device to skip one or more transient states between two results. See below table for examples:

State Transition Cause New State Notes
INACTIVE AF_TRIGGER FOCUSED_LOCKED Focus is already good or good after a scan, lens is now locked.
INACTIVE AF_TRIGGER NOT_FOCUSED_LOCKED Focus failed after a scan, lens is now locked.
FOCUSED_LOCKED AF_TRIGGER FOCUSED_LOCKED Focus is already good or good after a scan, lens is now locked.
NOT_FOCUSED_LOCKED AF_TRIGGER FOCUSED_LOCKED Focus is good after a scan, lens is not locked.

When ACAMERA_CONTROL_AF_MODE is AF_MODE_CONTINUOUS_VIDEO:

State Transition Cause New State Notes
INACTIVE Camera device initiates new scan PASSIVE_SCAN Start AF scan, Lens now moving
INACTIVE AF_TRIGGER NOT_FOCUSED_LOCKED AF state query, Lens now locked
PASSIVE_SCAN Camera device completes current scan PASSIVE_FOCUSED End AF scan, Lens now locked
PASSIVE_SCAN Camera device fails current scan PASSIVE_UNFOCUSED End AF scan, Lens now locked
PASSIVE_SCAN AF_TRIGGER FOCUSED_LOCKED Immediate transition, if focus is good. Lens now locked
PASSIVE_SCAN AF_TRIGGER NOT_FOCUSED_LOCKED Immediate transition, if focus is bad. Lens now locked
PASSIVE_SCAN AF_CANCEL INACTIVE Reset lens position, Lens now locked
PASSIVE_FOCUSED Camera device initiates new scan PASSIVE_SCAN Start AF scan, Lens now moving
PASSIVE_UNFOCUSED Camera device initiates new scan PASSIVE_SCAN Start AF scan, Lens now moving
PASSIVE_FOCUSED AF_TRIGGER FOCUSED_LOCKED Immediate transition, lens now locked
PASSIVE_UNFOCUSED AF_TRIGGER NOT_FOCUSED_LOCKED Immediate transition, lens now locked
FOCUSED_LOCKED AF_TRIGGER FOCUSED_LOCKED No effect
FOCUSED_LOCKED AF_CANCEL INACTIVE Restart AF scan
NOT_FOCUSED_LOCKED AF_TRIGGER NOT_FOCUSED_LOCKED No effect
NOT_FOCUSED_LOCKED AF_CANCEL INACTIVE Restart AF scan

When ACAMERA_CONTROL_AF_MODE is AF_MODE_CONTINUOUS_PICTURE:

State Transition Cause New State Notes
INACTIVE Camera device initiates new scan PASSIVE_SCAN Start AF scan, Lens now moving
INACTIVE AF_TRIGGER NOT_FOCUSED_LOCKED AF state query, Lens now locked
PASSIVE_SCAN Camera device completes current scan PASSIVE_FOCUSED End AF scan, Lens now locked
PASSIVE_SCAN Camera device fails current scan PASSIVE_UNFOCUSED End AF scan, Lens now locked
PASSIVE_SCAN AF_TRIGGER FOCUSED_LOCKED Eventual transition once the focus is good. Lens now locked
PASSIVE_SCAN AF_TRIGGER NOT_FOCUSED_LOCKED Eventual transition if cannot find focus. Lens now locked
PASSIVE_SCAN AF_CANCEL INACTIVE Reset lens position, Lens now locked
PASSIVE_FOCUSED Camera device initiates new scan PASSIVE_SCAN Start AF scan, Lens now moving
PASSIVE_UNFOCUSED Camera device initiates new scan PASSIVE_SCAN Start AF scan, Lens now moving
PASSIVE_FOCUSED AF_TRIGGER FOCUSED_LOCKED Immediate trans. Lens now locked
PASSIVE_UNFOCUSED AF_TRIGGER NOT_FOCUSED_LOCKED Immediate trans. Lens now locked
FOCUSED_LOCKED AF_TRIGGER FOCUSED_LOCKED No effect
FOCUSED_LOCKED AF_CANCEL INACTIVE Restart AF scan
NOT_FOCUSED_LOCKED AF_TRIGGER NOT_FOCUSED_LOCKED No effect
NOT_FOCUSED_LOCKED AF_CANCEL INACTIVE Restart AF scan

When switch between AF_MODE_CONTINUOUS_* (CAF modes) and AF_MODE_AUTO/AF_MODE_MACRO (AUTO modes), the initial INACTIVE or PASSIVE_SCAN states may be skipped by the camera device. When a trigger is included in a mode switch request, the trigger will be evaluated in the context of the new mode in the request. See below table for examples:

State Transition Cause New State Notes
any state CAF>AUTO mode switch INACTIVE Mode switch without trigger, initial state must be INACTIVE
any state CAF>AUTO mode switch with AF_TRIGGER trigger-reachable states from INACTIVE Mode switch with trigger, INACTIVE is skipped
any state AUTO>CAF mode switch passively reachable states from INACTIVE Mode switch without trigger, passive transient state is skipped
See also: ACAMERA_CONTROL_AF_MODE See also: ACAMERA_CONTROL_MODE See also: ACAMERA_CONTROL_SCENE_MODE

ACAMERA_CONTROL_AF_TRIGGER

Whether the camera device will trigger autofocus for this request.

Type: byte (acamera_metadata_enum_android_control_af_trigger_t)

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

This entry is normally set to IDLE, or is not included at all in the request settings.

When included and set to START, the camera device will trigger the autofocus algorithm. If autofocus is disabled, this trigger has no effect.

When set to CANCEL, the camera device will cancel any active trigger, and return to its initial AF state.

Generally, applications should set this entry to START or CANCEL for only a single capture, and then return it to IDLE (or not set at all). Specifying START for multiple captures in a row means restarting the AF operation over and over again.

See ACAMERA_CONTROL_AF_STATE for what the trigger means for each AF mode.

Using the autofocus trigger and the precapture trigger ACAMERA_CONTROL_AE_PRECAPTURE_TRIGGER simultaneously is allowed. However, since these triggers often require cooperation between the auto-focus and auto-exposure routines (for example, the may need to be enabled for a focus sweep), the camera device may delay acting on a later trigger until the previous trigger has been fully handled. This may lead to longer intervals between the trigger and changes to ACAMERA_CONTROL_AF_STATE, for example.

See also: ACAMERA_CONTROL_AE_PRECAPTURE_TRIGGER See also: ACAMERA_CONTROL_AF_STATE

ACAMERA_CONTROL_AVAILABLE_EFFECTS

List of color effects for ACAMERA_CONTROL_EFFECT_MODE that are supported by this camera device.

See also: ACAMERA_CONTROL_EFFECT_MODE

Type: byte[n]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

This list contains the color effect modes that can be applied to images produced by the camera device. Implementations are not expected to be consistent across all devices. If no color effect modes are available for a device, this will only list OFF.

A color effect will only be applied if ACAMERA_CONTROL_MODE != OFF. OFF is always included in this list.

This control has no effect on the operation of other control routines such as auto-exposure, white balance, or focus.

See also: ACAMERA_CONTROL_MODE

ACAMERA_CONTROL_AVAILABLE_MODES

List of control modes for ACAMERA_CONTROL_MODE that are supported by this camera device.

See also: ACAMERA_CONTROL_MODE

Type: byte[n]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

This list contains control modes that can be set for the camera device. LEGACY mode devices will always support AUTO mode. LIMITED and FULL devices will always support OFF, AUTO modes.

ACAMERA_CONTROL_AVAILABLE_SCENE_MODES

List of scene modes for ACAMERA_CONTROL_SCENE_MODE that are supported by this camera device.

See also: ACAMERA_CONTROL_SCENE_MODE

Type: byte[n]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

This list contains scene modes that can be set for the camera device. Only scene modes that have been fully implemented for the camera device may be included here. Implementations are not expected to be consistent across all devices.

If no scene modes are supported by the camera device, this will be set to DISABLED. Otherwise DISABLED will not be listed.

FACE_PRIORITY is always listed if face detection is supported (i.e.ACAMERA_STATISTICS_INFO_MAX_FACE_COUNT > 0).

See also: ACAMERA_STATISTICS_INFO_MAX_FACE_COUNT

ACAMERA_CONTROL_AVAILABLE_VIDEO_STABILIZATION_MODES

List of video stabilization modes for ACAMERA_CONTROL_VIDEO_STABILIZATION_MODE that are supported by this camera device.

See also: ACAMERA_CONTROL_VIDEO_STABILIZATION_MODE

Type: byte[n]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

OFF will always be listed.

ACAMERA_CONTROL_AWB_AVAILABLE_MODES

List of auto-white-balance modes for ACAMERA_CONTROL_AWB_MODE that are supported by this camera device.

See also: ACAMERA_CONTROL_AWB_MODE

Type: byte[n]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

Not all the auto-white-balance modes may be supported by a given camera device. This entry lists the valid modes for ACAMERA_CONTROL_AWB_MODE for this camera device.

All camera devices will support ON mode.

Camera devices that support the MANUAL_POST_PROCESSING capability will always support OFF mode, which enables application control of white balance, by using ACAMERA_COLOR_CORRECTION_TRANSFORM and ACAMERA_COLOR_CORRECTION_GAINS(ACAMERA_COLOR_CORRECTION_MODE must be set to TRANSFORM_MATRIX). This includes all FULL mode camera devices.

See also: ACAMERA_COLOR_CORRECTION_GAINS See also: ACAMERA_COLOR_CORRECTION_MODE See also: ACAMERA_COLOR_CORRECTION_TRANSFORM See also: ACAMERA_CONTROL_AWB_MODE

ACAMERA_CONTROL_AWB_LOCK

Whether auto-white balance (AWB) is currently locked to its latest calculated values.

Type: byte (acamera_metadata_enum_android_control_awb_lock_t)

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

When set to true (ON), the AWB algorithm is locked to its latest parameters, and will not change color balance settings until the lock is set to false (OFF).

Since the camera device has a pipeline of in-flight requests, the settings that get locked do not necessarily correspond to the settings that were present in the latest capture result received from the camera device, since additional captures and AWB updates may have occurred even before the result was sent out. If an application is switching between automatic and manual control and wishes to eliminate any flicker during the switch, the following procedure is recommended:

  1. Starting in auto-AWB mode:
  2. Lock AWB
  3. Wait for the first result to be output that has the AWB locked
  4. Copy AWB settings from that result into a request, set the request to manual AWB
  5. Submit the capture request, proceed to run manual AWB as desired.

Note that AWB lock is only meaningful when ACAMERA_CONTROL_AWB_MODE is in the AUTO mode; in other modes, AWB is already fixed to a specific setting.

Some LEGACY devices may not support ON; the value is then overridden to OFF.

See also: ACAMERA_CONTROL_AWB_MODE

ACAMERA_CONTROL_AWB_LOCK_AVAILABLE

Whether the camera device supports ACAMERA_CONTROL_AWB_LOCK

See also: ACAMERA_CONTROL_AWB_LOCK

Type: byte (acamera_metadata_enum_android_control_awb_lock_available_t)

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

Devices with MANUAL_POST_PROCESSING capability or BURST_CAPTURE capability will always list true. This includes FULL devices.

ACAMERA_CONTROL_AWB_MODE

Whether auto-white balance (AWB) is currently setting the color transform fields, and what its illumination target is.

Type: byte (acamera_metadata_enum_android_control_awb_mode_t)

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

This control is only effective if ACAMERA_CONTROL_MODE is AUTO.

When set to the ON mode, the camera device's auto-white balance routine is enabled, overriding the application's selected ACAMERA_COLOR_CORRECTION_TRANSFORM, ACAMERA_COLOR_CORRECTION_GAINS and ACAMERA_COLOR_CORRECTION_MODE. Note that when ACAMERA_CONTROL_AE_MODE is OFF, the behavior of AWB is device dependent. It is recommened to also set AWB mode to OFF or lock AWB by using ACAMERA_CONTROL_AWB_LOCK before setting AE mode to OFF.

When set to the OFF mode, the camera device's auto-white balance routine is disabled. The application manually controls the white balance by ACAMERA_COLOR_CORRECTION_TRANSFORM, ACAMERA_COLOR_CORRECTION_GAINS and ACAMERA_COLOR_CORRECTION_MODE.

When set to any other modes, the camera device's auto-white balance routine is disabled. The camera device uses each particular illumination target for white balance adjustment. The application's values for ACAMERA_COLOR_CORRECTION_TRANSFORM, ACAMERA_COLOR_CORRECTION_GAINS and ACAMERA_COLOR_CORRECTION_MODE are ignored.

See also: ACAMERA_COLOR_CORRECTION_GAINS See also: ACAMERA_COLOR_CORRECTION_MODE See also: ACAMERA_COLOR_CORRECTION_TRANSFORM See also: ACAMERA_CONTROL_AE_MODE See also: ACAMERA_CONTROL_AWB_LOCK See also: ACAMERA_CONTROL_MODE

ACAMERA_CONTROL_AWB_REGIONS

List of metering areas to use for auto-white-balance illuminant estimation.

Type: int32[5*area_count]

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

Not available if android.control.maxRegionsAwb is 0. Otherwise will always be present.

The maximum number of regions supported by the device is determined by the value of android.control.maxRegionsAwb.

The coordinate system is based on the active pixel array, with (0,0) being the top-left pixel in the active pixel array, and (ACAMERA_SENSOR_INFO_ACTIVE_ARRAY_SIZE.width - 1, ACAMERA_SENSOR_INFO_ACTIVE_ARRAY_SIZE.height - 1) being the bottom-right pixel in the active pixel array.

The weight must range from 0 to 1000, and represents a weight for every pixel in the area. This means that a large metering area with the same weight as a smaller area will have more effect in the metering result. Metering areas can partially overlap and the camera device will add the weights in the overlap region.

The weights are relative to weights of other white balance metering regions, so if only one region is used, all non-zero weights will have the same effect. A region with 0 weight is ignored.

If all regions have 0 weight, then no specific metering area needs to be used by the camera device.

If the metering region is outside the used ACAMERA_SCALER_CROP_REGION returned in capture result metadata, the camera device will ignore the sections outside the crop region and output only the intersection rectangle as the metering region in the result metadata. If the region is entirely outside the crop region, it will be ignored and not reported in the result metadata.

The data representation is int[5 * area_count]. Every five elements represent a metering region of (xmin, ymin, xmax, ymax, weight). The rectangle is defined to be inclusive on xmin and ymin, but exclusive on xmax and ymax.

See also: ACAMERA_SCALER_CROP_REGION See also: ACAMERA_SENSOR_INFO_ACTIVE_ARRAY_SIZE

ACAMERA_CONTROL_AWB_STATE

Current state of auto-white balance (AWB) algorithm.

Type: byte (acamera_metadata_enum_android_control_awb_state_t)

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks

Switching between or enabling AWB modes (ACAMERA_CONTROL_AWB_MODE) always resets the AWB state to INACTIVE. Similarly, switching between ACAMERA_CONTROL_MODE, or ACAMERA_CONTROL_SCENE_MODE if ACAMERA_CONTROL_MODE == USE_SCENE_MODE resets all the algorithm states to INACTIVE.

The camera device can do several state transitions between two results, if it is allowed by the state transition table. So INACTIVE may never actually be seen in a result.

The state in the result is the state for this image (in sync with this image): if AWB state becomes CONVERGED, then the image data associated with this result should be good to use.

Below are state transition tables for different AWB modes.

When ACAMERA_CONTROL_AWB_MODE != AWB_MODE_AUTO:

State Transition Cause New State Notes
INACTIVE INACTIVE Camera device auto white balance algorithm is disabled

When ACAMERA_CONTROL_AWB_MODE is AWB_MODE_AUTO:

State Transition Cause New State Notes
INACTIVE Camera device initiates AWB scan SEARCHING Values changing
INACTIVE ACAMERA_CONTROL_AWB_LOCK is ON LOCKED Values locked
SEARCHING Camera device finishes AWB scan CONVERGED Good values, not changing
SEARCHING ACAMERA_CONTROL_AWB_LOCK is ON LOCKED Values locked
CONVERGED Camera device initiates AWB scan SEARCHING Values changing
CONVERGED ACAMERA_CONTROL_AWB_LOCK is ON LOCKED Values locked
LOCKED ACAMERA_CONTROL_AWB_LOCK is OFF SEARCHING Values not good after unlock

For the above table, the camera device may skip reporting any state changes that happen without application intervention (i.e. mode switch, trigger, locking). Any state that can be skipped in that manner is called a transient state.

For example, for this AWB mode (AWB_MODE_AUTO), in addition to the state transitions listed in above table, it is also legal for the camera device to skip one or more transient states between two results. See below table for examples:

State Transition Cause New State Notes
INACTIVE Camera device finished AWB scan CONVERGED Values are already good, transient states are skipped by camera device.
LOCKED ACAMERA_CONTROL_AWB_LOCK is OFF CONVERGED Values good after unlock, transient states are skipped by camera device.
See also: ACAMERA_CONTROL_AWB_LOCK See also: ACAMERA_CONTROL_AWB_MODE See also: ACAMERA_CONTROL_MODE See also: ACAMERA_CONTROL_SCENE_MODE

ACAMERA_CONTROL_CAPTURE_INTENT

Information to the camera device 3A (auto-exposure, auto-focus, auto-white balance) routines about the purpose of this capture, to help the camera device to decide optimal 3A strategy.

Type: byte (acamera_metadata_enum_android_control_capture_intent_t)

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

This control (except for MANUAL) is only effective if ACAMERA_CONTROL_MODE != OFF and any 3A routine is active.

All intents are supported by all devices, except that:

  • ZERO_SHUTTER_LAG will be supported if ACAMERA_REQUEST_AVAILABLE_CAPABILITIES contains PRIVATE_REPROCESSING or YUV_REPROCESSING.
  • MANUAL will be supported if ACAMERA_REQUEST_AVAILABLE_CAPABILITIES contains MANUAL_SENSOR.
  • MOTION_TRACKING will be supported if ACAMERA_REQUEST_AVAILABLE_CAPABILITIES contains MOTION_TRACKING.

See also: ACAMERA_CONTROL_MODE See also: ACAMERA_REQUEST_AVAILABLE_CAPABILITIES

ACAMERA_CONTROL_EFFECT_MODE

A special color effect to apply.

Type: byte (acamera_metadata_enum_android_control_effect_mode_t)

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

When this mode is set, a color effect will be applied to images produced by the camera device. The interpretation and implementation of these color effects is left to the implementor of the camera device, and should not be depended on to be consistent (or present) across all devices.

ACAMERA_CONTROL_ENABLE_ZSL

Allow camera device to enable zero-shutter-lag mode for requests with ACAMERA_CONTROL_CAPTURE_INTENT == STILL_CAPTURE.

See also: ACAMERA_CONTROL_CAPTURE_INTENT

Type: byte (acamera_metadata_enum_android_control_enable_zsl_t)

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

If enableZsl is true, the camera device may enable zero-shutter-lag mode for requests with STILL_CAPTURE capture intent. The camera device may use images captured in the past to produce output images for a zero-shutter-lag request. The result metadata including the ACAMERA_SENSOR_TIMESTAMP reflects the source frames used to produce output images. Therefore, the contents of the output images and the result metadata may be out of order compared to previous regular requests. enableZsl does not affect requests with other capture intents.

For example, when requests are submitted in the following order: Request A: enableZsl is ON, ACAMERA_CONTROL_CAPTURE_INTENT is PREVIEW Request B: enableZsl is ON, ACAMERA_CONTROL_CAPTURE_INTENT is STILL_CAPTURE

The output images for request B may have contents captured before the output images for request A, and the result metadata for request B may be older than the result metadata for request A.

Note that when enableZsl is true, it is not guaranteed to get output images captured in the past for requests with STILL_CAPTURE capture intent.

For applications targeting SDK versions O and newer, the value of enableZsl in TEMPLATE_STILL_CAPTURE template may be true. The value in other templates is always false if present.

For applications targeting SDK versions older than O, the value of enableZsl in all capture templates is always false if present.

For application-operated ZSL, use CAMERA3_TEMPLATE_ZERO_SHUTTER_LAG template.

See also: ACAMERA_CONTROL_CAPTURE_INTENT See also: ACAMERA_SENSOR_TIMESTAMP

ACAMERA_CONTROL_END
ACAMERA_CONTROL_MAX_REGIONS

List of the maximum number of regions that can be used for metering in auto-exposure (AE), auto-white balance (AWB), and auto-focus (AF); this corresponds to the the maximum number of elements in ACAMERA_CONTROL_AE_REGIONS, ACAMERA_CONTROL_AWB_REGIONS, and ACAMERA_CONTROL_AF_REGIONS.

See also: ACAMERA_CONTROL_AE_REGIONS See also: ACAMERA_CONTROL_AF_REGIONS See also: ACAMERA_CONTROL_AWB_REGIONS

Type: int32[3]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

ACAMERA_CONTROL_MODE

Overall mode of 3A (auto-exposure, auto-white-balance, auto-focus) control routines.

Type: byte (acamera_metadata_enum_android_control_mode_t)

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

This is a top-level 3A control switch. When set to OFF, all 3A control by the camera device is disabled. The application must set the fields for capture parameters itself.

When set to AUTO, the individual algorithm controls in ACAMERA_CONTROL_* are in effect, such as ACAMERA_CONTROL_AF_MODE.

When set to USE_SCENE_MODE, the individual controls in ACAMERA_CONTROL_* are mostly disabled, and the camera device implements one of the scene mode settings (such as ACTION, SUNSET, or PARTY) as it wishes. The camera device scene mode 3A settings are provided by capture results.

When set to OFF_KEEP_STATE, it is similar to OFF mode, the only difference is that this frame will not be used by camera device background 3A statistics update, as if this frame is never captured. This mode can be used in the scenario where the application doesn't want a 3A manual control capture to affect the subsequent auto 3A capture results.

See also: ACAMERA_CONTROL_AF_MODE

ACAMERA_CONTROL_POST_RAW_SENSITIVITY_BOOST

The amount of additional sensitivity boost applied to output images after RAW sensor data is captured.

Type: int32

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

Some camera devices support additional digital sensitivity boosting in the camera processing pipeline after sensor RAW image is captured. Such a boost will be applied to YUV/JPEG format output images but will not have effect on RAW output formats like RAW_SENSOR, RAW10, RAW12 or RAW_OPAQUE.

This key will be null for devices that do not support any RAW format outputs. For devices that do support RAW format outputs, this key will always present, and if a device does not support post RAW sensitivity boost, it will list 100 in this key.

If the camera device cannot apply the exact boost requested, it will reduce the boost to the nearest supported value. The final boost value used will be available in the output capture result.

For devices that support post RAW sensitivity boost, the YUV/JPEG output images of such device will have the total sensitivity of ACAMERA_SENSOR_SENSITIVITY * ACAMERA_CONTROL_POST_RAW_SENSITIVITY_BOOST / 100 The sensitivity of RAW format images will always be ACAMERA_SENSOR_SENSITIVITY

This control is only effective if ACAMERA_CONTROL_AE_MODE or ACAMERA_CONTROL_MODE is set to OFF; otherwise the auto-exposure algorithm will override this value.

See also: ACAMERA_CONTROL_AE_MODE See also: ACAMERA_CONTROL_MODE See also: ACAMERA_CONTROL_POST_RAW_SENSITIVITY_BOOST See also: ACAMERA_SENSOR_SENSITIVITY

ACAMERA_CONTROL_POST_RAW_SENSITIVITY_BOOST_RANGE

Range of boosts for ACAMERA_CONTROL_POST_RAW_SENSITIVITY_BOOST supported by this camera device.

See also: ACAMERA_CONTROL_POST_RAW_SENSITIVITY_BOOST

Type: int32[2]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

Devices support post RAW sensitivity boost will advertise ACAMERA_CONTROL_POST_RAW_SENSITIVITY_BOOST key for controling post RAW sensitivity boost.

This key will be null for devices that do not support any RAW format outputs. For devices that do support RAW format outputs, this key will always present, and if a device does not support post RAW sensitivity boost, it will list (100, 100) in this key.

See also: ACAMERA_CONTROL_POST_RAW_SENSITIVITY_BOOST

ACAMERA_CONTROL_SCENE_MODE

Control for which scene mode is currently active.

Type: byte (acamera_metadata_enum_android_control_scene_mode_t)

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

Scene modes are custom camera modes optimized for a certain set of conditions and capture settings.

This is the mode that that is active when ACAMERA_CONTROL_MODE == USE_SCENE_MODE. Aside from FACE_PRIORITY, these modes will disable ACAMERA_CONTROL_AE_MODE, ACAMERA_CONTROL_AWB_MODE, and ACAMERA_CONTROL_AF_MODE while in use.

The interpretation and implementation of these scene modes is left to the implementor of the camera device. Their behavior will not be consistent across all devices, and any given device may only implement a subset of these modes.

See also: ACAMERA_CONTROL_AE_MODE See also: ACAMERA_CONTROL_AF_MODE See also: ACAMERA_CONTROL_AWB_MODE See also: ACAMERA_CONTROL_MODE

ACAMERA_CONTROL_VIDEO_STABILIZATION_MODE

Whether video stabilization is active.

Type: byte (acamera_metadata_enum_android_control_video_stabilization_mode_t)

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

Video stabilization automatically warps images from the camera in order to stabilize motion between consecutive frames.

If enabled, video stabilization can modify the ACAMERA_SCALER_CROP_REGION to keep the video stream stabilized.

Switching between different video stabilization modes may take several frames to initialize, the camera device will report the current mode in capture result metadata. For example, When "ON" mode is requested, the video stabilization modes in the first several capture results may still be "OFF", and it will become "ON" when the initialization is done.

In addition, not all recording sizes or frame rates may be supported for stabilization by a device that reports stabilization support. It is guaranteed that an output targeting a MediaRecorder or MediaCodec will be stabilized if the recording resolution is less than or equal to 1920 x 1080 (width less than or equal to 1920, height less than or equal to 1080), and the recording frame rate is less than or equal to 30fps. At other sizes, the CaptureResult ACAMERA_CONTROL_VIDEO_STABILIZATION_MODE field will return OFF if the recording output is not stabilized, or if there are no output Surface types that can be stabilized.

If a camera device supports both this mode and OIS (ACAMERA_LENS_OPTICAL_STABILIZATION_MODE), turning both modes on may produce undesirable interaction, so it is recommended not to enable both at the same time.

See also: ACAMERA_CONTROL_VIDEO_STABILIZATION_MODE See also: ACAMERA_LENS_OPTICAL_STABILIZATION_MODE See also: ACAMERA_SCALER_CROP_REGION

ACAMERA_DEPTH_AVAILABLE_DEPTH_MIN_FRAME_DURATIONS

This lists the minimum frame duration for each format/size combination for depth output formats.

Type: int64[4*n]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

This should correspond to the frame duration when only that stream is active, with all processing (typically in android.*.mode) set to either OFF or FAST.

When multiple streams are used in a request, the minimum frame duration will be max(individual stream min durations).

The minimum frame duration of a stream (of a particular format, size) is the same regardless of whether the stream is input or output.

See ACAMERA_SENSOR_FRAME_DURATION and ACAMERA_SCALER_AVAILABLE_STALL_DURATIONS for more details about calculating the max frame rate.

See also: ACAMERA_SCALER_AVAILABLE_STALL_DURATIONS See also: ACAMERA_SENSOR_FRAME_DURATION

ACAMERA_DEPTH_AVAILABLE_DEPTH_STALL_DURATIONS

This lists the maximum stall duration for each output format/size combination for depth streams.

Type: int64[4*n]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

A stall duration is how much extra time would get added to the normal minimum frame duration for a repeating request that has streams with non-zero stall.

This functions similarly to ACAMERA_SCALER_AVAILABLE_STALL_DURATIONS for depth streams.

All depth output stream formats may have a nonzero stall duration.

See also: ACAMERA_SCALER_AVAILABLE_STALL_DURATIONS

ACAMERA_DEPTH_AVAILABLE_DEPTH_STREAM_CONFIGURATIONS

The available depth dataspace stream configurations that this camera device supports (i.e. format, width, height, output/input stream).

Type: int32[n*4] (acamera_metadata_enum_android_depth_available_depth_stream_configurations_t)

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

These are output stream configurations for use with dataSpace HAL_DATASPACE_DEPTH. The configurations are listed as (format, width, height, input?) tuples.

Only devices that support depth output for at least the HAL_PIXEL_FORMAT_Y16 dense depth map may include this entry.

A device that also supports the HAL_PIXEL_FORMAT_BLOB sparse depth point cloud must report a single entry for the format in this list as (HAL_PIXEL_FORMAT_BLOB, android.depth.maxDepthSamples, 1, OUTPUT) in addition to the entries for HAL_PIXEL_FORMAT_Y16.

ACAMERA_DEPTH_DEPTH_IS_EXCLUSIVE

Indicates whether a capture request may target both a DEPTH16 / DEPTH_POINT_CLOUD output, and normal color outputs (such as YUV_420_888, JPEG, or RAW) simultaneously.

Type: byte (acamera_metadata_enum_android_depth_depth_is_exclusive_t)

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

If TRUE, including both depth and color outputs in a single capture request is not supported. An application must interleave color and depth requests. If FALSE, a single request can target both types of output.

Typically, this restriction exists on camera devices that need to emit a specific pattern or wavelength of light to measure depth values, which causes the color image to be corrupted during depth measurement.

ACAMERA_DEPTH_END
ACAMERA_DISTORTION_CORRECTION_AVAILABLE_MODES

List of distortion correction modes for ACAMERA_DISTORTION_CORRECTION_MODE that are supported by this camera device.

See also: ACAMERA_DISTORTION_CORRECTION_MODE

Type: byte[n]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

No device is required to support this API; such devices will always list only 'OFF'. All devices that support this API will list both FAST and HIGH_QUALITY.

ACAMERA_DISTORTION_CORRECTION_END
ACAMERA_DISTORTION_CORRECTION_MODE

Mode of operation for the lens distortion correction block.

Type: byte (acamera_metadata_enum_android_distortion_correction_mode_t)

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

The lens distortion correction block attempts to improve image quality by fixing radial, tangential, or other geometric aberrations in the camera device's optics. If available, the ACAMERA_LENS_DISTORTION field documents the lens's distortion parameters.

OFF means no distortion correction is done.

FAST/HIGH_QUALITY both mean camera device determined distortion correction will be applied. HIGH_QUALITY mode indicates that the camera device will use the highest-quality correction algorithms, even if it slows down capture rate. FAST means the camera device will not slow down capture rate when applying correction. FAST may be the same as OFF if any correction at all would slow down capture rate. Every output stream will have a similar amount of enhancement applied.

The correction only applies to processed outputs such as YUV, JPEG, or DEPTH16; it is not applied to any RAW output. Metadata coordinates such as face rectangles or metering regions are also not affected by correction.

Applications enabling distortion correction need to pay extra attention when converting image coordinates between corrected output buffers and the sensor array. For example, if the app supports tap-to-focus and enables correction, it then has to apply the distortion model described in ACAMERA_LENS_DISTORTION to the image buffer tap coordinates to properly calculate the tap position on the sensor active array to be used with ACAMERA_CONTROL_AF_REGIONS. The same applies in reverse to detected face rectangles if they need to be drawn on top of the corrected output buffers.

See also: ACAMERA_CONTROL_AF_REGIONS See also: ACAMERA_LENS_DISTORTION

ACAMERA_EDGE_AVAILABLE_EDGE_MODES

List of edge enhancement modes for ACAMERA_EDGE_MODE that are supported by this camera device.

See also: ACAMERA_EDGE_MODE

Type: byte[n]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

Full-capability camera devices must always support OFF; camera devices that support YUV_REPROCESSING or PRIVATE_REPROCESSING will list ZERO_SHUTTER_LAG; all devices will list FAST.

ACAMERA_EDGE_END
ACAMERA_EDGE_MODE

Operation mode for edge enhancement.

Type: byte (acamera_metadata_enum_android_edge_mode_t)

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

Edge enhancement improves sharpness and details in the captured image. OFF means no enhancement will be applied by the camera device.

FAST/HIGH_QUALITY both mean camera device determined enhancement will be applied. HIGH_QUALITY mode indicates that the camera device will use the highest-quality enhancement algorithms, even if it slows down capture rate. FAST means the camera device will not slow down capture rate when applying edge enhancement. FAST may be the same as OFF if edge enhancement will slow down capture rate. Every output stream will have a similar amount of enhancement applied.

ZERO_SHUTTER_LAG is meant to be used by applications that maintain a continuous circular buffer of high-resolution images during preview and reprocess image(s) from that buffer into a final capture when triggered by the user. In this mode, the camera device applies edge enhancement to low-resolution streams (below maximum recording resolution) to maximize preview quality, but does not apply edge enhancement to high-resolution streams, since those will be reprocessed later if necessary.

For YUV_REPROCESSING, these FAST/HIGH_QUALITY modes both mean that the camera device will apply FAST/HIGH_QUALITY YUV-domain edge enhancement, respectively. The camera device may adjust its internal edge enhancement parameters for best image quality based on the android.reprocess.effectiveExposureFactor, if it is set.

ACAMERA_FLASH_END
ACAMERA_FLASH_INFO_AVAILABLE

Whether this camera device has a flash unit.

Type: byte (acamera_metadata_enum_android_flash_info_available_t)

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

Will be false if no flash is available.

If there is no flash unit, none of the flash controls do anything.

ACAMERA_FLASH_INFO_END
ACAMERA_FLASH_MODE

The desired mode for for the camera device's flash control.

Type: byte (acamera_metadata_enum_android_flash_mode_t)

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

This control is only effective when flash unit is available (ACAMERA_FLASH_INFO_AVAILABLE == true).

When this control is used, the ACAMERA_CONTROL_AE_MODE must be set to ON or OFF. Otherwise, the camera device auto-exposure related flash control (ON_AUTO_FLASH, ON_ALWAYS_FLASH, or ON_AUTO_FLASH_REDEYE) will override this control.

When set to OFF, the camera device will not fire flash for this capture.

When set to SINGLE, the camera device will fire flash regardless of the camera device's auto-exposure routine's result. When used in still capture case, this control should be used along with auto-exposure (AE) precapture metering sequence (ACAMERA_CONTROL_AE_PRECAPTURE_TRIGGER), otherwise, the image may be incorrectly exposed.

When set to TORCH, the flash will be on continuously. This mode can be used for use cases such as preview, auto-focus assist, still capture, or video recording.

The flash status will be reported by ACAMERA_FLASH_STATE in the capture result metadata.

See also: ACAMERA_CONTROL_AE_MODE See also: ACAMERA_CONTROL_AE_PRECAPTURE_TRIGGER See also: ACAMERA_FLASH_INFO_AVAILABLE See also: ACAMERA_FLASH_STATE

ACAMERA_FLASH_STATE

Current state of the flash unit.

Type: byte (acamera_metadata_enum_android_flash_state_t)

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks

When the camera device doesn't have flash unit (i.e. ACAMERA_FLASH_INFO_AVAILABLE == false), this state will always be UNAVAILABLE. Other states indicate the current flash status.

In certain conditions, this will be available on LEGACY devices:

  • Flash-less cameras always return UNAVAILABLE.
  • Using ACAMERA_CONTROL_AE_MODE == ON_ALWAYS_FLASH will always return FIRED.
  • Using ACAMERA_FLASH_MODE == TORCH will always return FIRED.

In all other conditions the state will not be available on LEGACY devices (i.e. it will be null).

See also: ACAMERA_CONTROL_AE_MODE See also: ACAMERA_FLASH_INFO_AVAILABLE See also: ACAMERA_FLASH_MODE

ACAMERA_HOT_PIXEL_AVAILABLE_HOT_PIXEL_MODES

List of hot pixel correction modes for ACAMERA_HOT_PIXEL_MODE that are supported by this camera device.

See also: ACAMERA_HOT_PIXEL_MODE

Type: byte[n]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

FULL mode camera devices will always support FAST.

ACAMERA_HOT_PIXEL_END
ACAMERA_HOT_PIXEL_MODE

Operational mode for hot pixel correction.

Type: byte (acamera_metadata_enum_android_hot_pixel_mode_t)

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

Hotpixel correction interpolates out, or otherwise removes, pixels that do not accurately measure the incoming light (i.e. pixels that are stuck at an arbitrary value or are oversensitive).

ACAMERA_INFO_END
ACAMERA_INFO_SUPPORTED_HARDWARE_LEVEL

Generally classifies the overall set of the camera device functionality.

Type: byte (acamera_metadata_enum_android_info_supported_hardware_level_t)

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

The supported hardware level is a high-level description of the camera device's capabilities, summarizing several capabilities into one field. Each level adds additional features to the previous one, and is always a strict superset of the previous level. The ordering is LEGACY < LIMITED < FULL < LEVEL_3.

Starting from LEVEL_3, the level enumerations are guaranteed to be in increasing numerical value as well. To check if a given device is at least at a given hardware level, the following code snippet can be used:

// Returns true if the device supports the required hardware level, or better.
boolean isHardwareLevelSupported(CameraCharacteristics c, int requiredLevel) {
    int deviceLevel = c.get(CameraCharacteristics.INFO_SUPPORTED_HARDWARE_LEVEL);
    if (deviceLevel == CameraCharacteristics.INFO_SUPPORTED_HARDWARE_LEVEL_LEGACY) {
        return requiredLevel == deviceLevel;
    }
    // deviceLevel is not LEGACY, can use numerical sort
    return requiredLevel <= deviceLevel;
}

At a high level, the levels are:

  • LEGACY devices operate in a backwards-compatibility mode for older Android devices, and have very limited capabilities.
  • LIMITED devices represent the baseline feature set, and may also include additional capabilities that are subsets of FULL.
  • FULL devices additionally support per-frame manual control of sensor, flash, lens and post-processing settings, and image capture at a high rate.
  • LEVEL_3 devices additionally support YUV reprocessing and RAW image capture, along with additional output stream configurations.

See the individual level enums for full descriptions of the supported capabilities. The ACAMERA_REQUEST_AVAILABLE_CAPABILITIES entry describes the device's capabilities at a finer-grain level, if needed. In addition, many controls have their available settings or ranges defined in individual entries from ACameraManager_getCameraCharacteristics.

Some features are not part of any particular hardware level or capability and must be queried separately. These include:

  • Calibrated timestamps (ACAMERA_SENSOR_INFO_TIMESTAMP_SOURCE == REALTIME)
  • Precision lens control (ACAMERA_LENS_INFO_FOCUS_DISTANCE_CALIBRATION == CALIBRATED)
  • Face detection (ACAMERA_STATISTICS_INFO_AVAILABLE_FACE_DETECT_MODES)
  • Optical or electrical image stabilization (ACAMERA_LENS_INFO_AVAILABLE_OPTICAL_STABILIZATION, ACAMERA_CONTROL_AVAILABLE_VIDEO_STABILIZATION_MODES)

See also: ACAMERA_CONTROL_AVAILABLE_VIDEO_STABILIZATION_MODES See also: ACAMERA_LENS_INFO_AVAILABLE_OPTICAL_STABILIZATION See also: ACAMERA_LENS_INFO_FOCUS_DISTANCE_CALIBRATION See also: ACAMERA_REQUEST_AVAILABLE_CAPABILITIES See also: ACAMERA_SENSOR_INFO_TIMESTAMP_SOURCE See also: ACAMERA_STATISTICS_INFO_AVAILABLE_FACE_DETECT_MODES

ACAMERA_INFO_VERSION

A short string for manufacturer version information about the camera device, such as ISP hardware, sensors, etc.

Type: byte

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

This can be used in TAG_IMAGE_DESCRIPTION in jpeg EXIF. This key may be absent if no version information is available on the device.

ACAMERA_JPEG_AVAILABLE_THUMBNAIL_SIZES

List of JPEG thumbnail sizes for ACAMERA_JPEG_THUMBNAIL_SIZE supported by this camera device.

See also: ACAMERA_JPEG_THUMBNAIL_SIZE

Type: int32[2*n]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

This list will include at least one non-zero resolution, plus (0,0) for indicating no thumbnail should be generated.

Below condiditions will be satisfied for this size list:

  • The sizes will be sorted by increasing pixel area (width x height). If several resolutions have the same area, they will be sorted by increasing width.
  • The aspect ratio of the largest thumbnail size will be same as the aspect ratio of largest JPEG output size in ACAMERA_SCALER_AVAILABLE_STREAM_CONFIGURATIONS. The largest size is defined as the size that has the largest pixel area in a given size list.
  • Each output JPEG size in ACAMERA_SCALER_AVAILABLE_STREAM_CONFIGURATIONS will have at least one corresponding size that has the same aspect ratio in availableThumbnailSizes, and vice versa.
  • All non-(0, 0) sizes will have non-zero widths and heights.

See also: ACAMERA_SCALER_AVAILABLE_STREAM_CONFIGURATIONS

ACAMERA_JPEG_END
ACAMERA_JPEG_GPS_COORDINATES

GPS coordinates to include in output JPEG EXIF.

Type: double[3]

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

ACAMERA_JPEG_GPS_PROCESSING_METHOD

32 characters describing GPS algorithm to include in EXIF.

Type: byte

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

ACAMERA_JPEG_GPS_TIMESTAMP

Time GPS fix was made to include in EXIF.

Type: int64

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

ACAMERA_JPEG_ORIENTATION

The orientation for a JPEG image.

Type: int32

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

The clockwise rotation angle in degrees, relative to the orientation to the camera, that the JPEG picture needs to be rotated by, to be viewed upright.

Camera devices may either encode this value into the JPEG EXIF header, or rotate the image data to match this orientation. When the image data is rotated, the thumbnail data will also be rotated.

Note that this orientation is relative to the orientation of the camera sensor, given by ACAMERA_SENSOR_ORIENTATION.

To translate from the device orientation given by the Android sensor APIs for camera sensors which are not EXTERNAL, the following sample code may be used:

private int getJpegOrientation(CameraCharacteristics c, int deviceOrientation) {
    if (deviceOrientation == android.view.OrientationEventListener.ORIENTATION_UNKNOWN) return 0;
    int sensorOrientation = c.get(CameraCharacteristics.SENSOR_ORIENTATION);

    // Round device orientation to a multiple of 90
    deviceOrientation = (deviceOrientation + 45) / 90 * 90;

    // Reverse device orientation for front-facing cameras
    boolean facingFront = c.get(CameraCharacteristics.LENS_FACING) == CameraCharacteristics.LENS_FACING_FRONT;
    if (facingFront) deviceOrientation = -deviceOrientation;

    // Calculate desired JPEG orientation relative to camera orientation to make
    // the image upright relative to the device orientation
    int jpegOrientation = (sensorOrientation + deviceOrientation + 360) % 360;

    return jpegOrientation;
}

For EXTERNAL cameras the sensor orientation will always be set to 0 and the facing will also be set to EXTERNAL. The above code is not relevant in such case.

See also: ACAMERA_SENSOR_ORIENTATION

ACAMERA_JPEG_QUALITY

Compression quality of the final JPEG image.

Type: byte

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

85-95 is typical usage range.

ACAMERA_JPEG_THUMBNAIL_QUALITY

Compression quality of JPEG thumbnail.

Type: byte

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

ACAMERA_JPEG_THUMBNAIL_SIZE

Resolution of embedded JPEG thumbnail.

Type: int32[2]

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

When set to (0, 0) value, the JPEG EXIF will not contain thumbnail, but the captured JPEG will still be a valid image.

For best results, when issuing a request for a JPEG image, the thumbnail size selected should have the same aspect ratio as the main JPEG output.

If the thumbnail image aspect ratio differs from the JPEG primary image aspect ratio, the camera device creates the thumbnail by cropping it from the primary image. For example, if the primary image has 4:3 aspect ratio, the thumbnail image has 16:9 aspect ratio, the primary image will be cropped vertically (letterbox) to generate the thumbnail image. The thumbnail image will always have a smaller Field Of View (FOV) than the primary image when aspect ratios differ.

When an ACAMERA_JPEG_ORIENTATION of non-zero degree is requested, the camera device will handle thumbnail rotation in one of the following ways:

  • Set the EXIF orientation flag and keep jpeg and thumbnail image data unrotated.
  • Rotate the jpeg and thumbnail image data and not set EXIF orientation flag. In this case, LIMITED or FULL hardware level devices will report rotated thumnail size in capture result, so the width and height will be interchanged if 90 or 270 degree orientation is requested. LEGACY device will always report unrotated thumbnail size.

See also: ACAMERA_JPEG_ORIENTATION

ACAMERA_LENS_APERTURE

The desired lens aperture size, as a ratio of lens focal length to the effective aperture diameter.

Type: float

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

Setting this value is only supported on the camera devices that have a variable aperture lens.

When this is supported and ACAMERA_CONTROL_AE_MODE is OFF, this can be set along with ACAMERA_SENSOR_EXPOSURE_TIME, ACAMERA_SENSOR_SENSITIVITY, and ACAMERA_SENSOR_FRAME_DURATION to achieve manual exposure control.

The requested aperture value may take several frames to reach the requested value; the camera device will report the current (intermediate) aperture size in capture result metadata while the aperture is changing. While the aperture is still changing, ACAMERA_LENS_STATE will be set to MOVING.

When this is supported and ACAMERA_CONTROL_AE_MODE is one of the ON modes, this will be overridden by the camera device auto-exposure algorithm, the overridden values are then provided back to the user in the corresponding result.

See also: ACAMERA_CONTROL_AE_MODE See also: ACAMERA_LENS_STATE See also: ACAMERA_SENSOR_EXPOSURE_TIME See also: ACAMERA_SENSOR_FRAME_DURATION See also: ACAMERA_SENSOR_SENSITIVITY

ACAMERA_LENS_DISTORTION

The correction coefficients to correct for this camera device's radial and tangential lens distortion.

Replaces the deprecated ACAMERA_LENS_RADIAL_DISTORTION field, which was inconsistently defined.

See also:ACAMERA_LENS_RADIAL_DISTORTION

Type: float[5]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics
  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks

Three radial distortion coefficients [kappa_1, kappa_2, kappa_3] and two tangential distortion coefficients [kappa_4, kappa_5] that can be used to correct the lens's geometric distortion with the mapping equations:

 x_c = x_i * ( 1 + kappa_1 * r^2 + kappa_2 * r^4 + kappa_3 * r^6 ) +
       kappa_4 * (2 * x_i * y_i) + kappa_5 * ( r^2 + 2 * x_i^2 )
 y_c = y_i * ( 1 + kappa_1 * r^2 + kappa_2 * r^4 + kappa_3 * r^6 ) +
       kappa_5 * (2 * x_i * y_i) + kappa_4 * ( r^2 + 2 * y_i^2 )

Here, [x_c, y_c] are the coordinates to sample in the input image that correspond to the pixel values in the corrected image at the coordinate [x_i, y_i]:

 correctedImage(x_i, y_i) = sample_at(x_c, y_c, inputImage)

The pixel coordinates are defined in a coordinate system related to the ACAMERA_LENS_INTRINSIC_CALIBRATION calibration fields; see that entry for details of the mapping stages. Both [x_i, y_i] and [x_c, y_c] have (0,0) at the lens optical center [c_x, c_y], and the range of the coordinates depends on the focal length terms of the intrinsic calibration.

Finally, r represents the radial distance from the optical center, r^2 = x_i^2 + y_i^2.

The distortion model used is the Brown-Conrady model.

See also: ACAMERA_LENS_INTRINSIC_CALIBRATION

ACAMERA_LENS_END
ACAMERA_LENS_FACING

Direction the camera faces relative to device screen.

Type: byte (acamera_metadata_enum_android_lens_facing_t)

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

ACAMERA_LENS_FILTER_DENSITY

The desired setting for the lens neutral density filter(s).

Type: float

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

This control will not be supported on most camera devices.

Lens filters are typically used to lower the amount of light the sensor is exposed to (measured in steps of EV). As used here, an EV step is the standard logarithmic representation, which are non-negative, and inversely proportional to the amount of light hitting the sensor. For example, setting this to 0 would result in no reduction of the incoming light, and setting this to 2 would mean that the filter is set to reduce incoming light by two stops (allowing 1/4 of the prior amount of light to the sensor).

It may take several frames before the lens filter density changes to the requested value. While the filter density is still changing, ACAMERA_LENS_STATE will be set to MOVING.

See also: ACAMERA_LENS_STATE

ACAMERA_LENS_FOCAL_LENGTH

The desired lens focal length; used for optical zoom.

Type: float

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

This setting controls the physical focal length of the camera device's lens. Changing the focal length changes the field of view of the camera device, and is usually used for optical zoom.

Like ACAMERA_LENS_FOCUS_DISTANCE and ACAMERA_LENS_APERTURE, this setting won't be applied instantaneously, and it may take several frames before the lens can change to the requested focal length. While the focal length is still changing, ACAMERA_LENS_STATE will be set to MOVING.

Optical zoom will not be supported on most devices.

See also: ACAMERA_LENS_APERTURE See also: ACAMERA_LENS_FOCUS_DISTANCE See also: ACAMERA_LENS_STATE

ACAMERA_LENS_FOCUS_DISTANCE

Desired distance to plane of sharpest focus, measured from frontmost surface of the lens.

Type: float

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

Should be zero for fixed-focus cameras

ACAMERA_LENS_FOCUS_RANGE

The range of scene distances that are in sharp focus (depth of field).

Type: float[2]

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks

If variable focus not supported, can still report fixed depth of field range

ACAMERA_LENS_INFO_AVAILABLE_APERTURES

List of aperture size values for ACAMERA_LENS_APERTURE that are supported by this camera device.

See also: ACAMERA_LENS_APERTURE

Type: float[n]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

If the camera device doesn't support a variable lens aperture, this list will contain only one value, which is the fixed aperture size.

If the camera device supports a variable aperture, the aperture values in this list will be sorted in ascending order.

ACAMERA_LENS_INFO_AVAILABLE_FILTER_DENSITIES

List of neutral density filter values for ACAMERA_LENS_FILTER_DENSITY that are supported by this camera device.

See also: ACAMERA_LENS_FILTER_DENSITY

Type: float[n]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

If a neutral density filter is not supported by this camera device, this list will contain only 0. Otherwise, this list will include every filter density supported by the camera device, in ascending order.

ACAMERA_LENS_INFO_AVAILABLE_FOCAL_LENGTHS

List of focal lengths for ACAMERA_LENS_FOCAL_LENGTH that are supported by this camera device.

See also: ACAMERA_LENS_FOCAL_LENGTH

Type: float[n]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

If optical zoom is not supported, this list will only contain a single value corresponding to the fixed focal length of the device. Otherwise, this list will include every focal length supported by the camera device, in ascending order.

ACAMERA_LENS_INFO_AVAILABLE_OPTICAL_STABILIZATION

List of optical image stabilization (OIS) modes for ACAMERA_LENS_OPTICAL_STABILIZATION_MODE that are supported by this camera device.

See also: ACAMERA_LENS_OPTICAL_STABILIZATION_MODE

Type: byte[n]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

If OIS is not supported by a given camera device, this list will contain only OFF.

ACAMERA_LENS_INFO_END
ACAMERA_LENS_INFO_FOCUS_DISTANCE_CALIBRATION

The lens focus distance calibration quality.

Type: byte (acamera_metadata_enum_android_lens_info_focus_distance_calibration_t)

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

The lens focus distance calibration quality determines the reliability of focus related metadata entries, i.e. ACAMERA_LENS_FOCUS_DISTANCE, ACAMERA_LENS_FOCUS_RANGE, ACAMERA_LENS_INFO_HYPERFOCAL_DISTANCE, and ACAMERA_LENS_INFO_MINIMUM_FOCUS_DISTANCE.

APPROXIMATE and CALIBRATED devices report the focus metadata in units of diopters (1/meter), so 0.0f represents focusing at infinity, and increasing positive numbers represent focusing closer and closer to the camera device. The focus distance control also uses diopters on these devices.

UNCALIBRATED devices do not use units that are directly comparable to any real physical measurement, but 0.0f still represents farthest focus, and ACAMERA_LENS_INFO_MINIMUM_FOCUS_DISTANCE represents the nearest focus the device can achieve.

See also: ACAMERA_LENS_FOCUS_DISTANCE See also: ACAMERA_LENS_FOCUS_RANGE See also: ACAMERA_LENS_INFO_HYPERFOCAL_DISTANCE See also: ACAMERA_LENS_INFO_MINIMUM_FOCUS_DISTANCE

ACAMERA_LENS_INFO_HYPERFOCAL_DISTANCE

Hyperfocal distance for this lens.

Type: float

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

If the lens is not fixed focus, the camera device will report this field when ACAMERA_LENS_INFO_FOCUS_DISTANCE_CALIBRATION is APPROXIMATE or CALIBRATED.

See also: ACAMERA_LENS_INFO_FOCUS_DISTANCE_CALIBRATION

ACAMERA_LENS_INFO_MINIMUM_FOCUS_DISTANCE

Shortest distance from frontmost surface of the lens that can be brought into sharp focus.

Type: float

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

If the lens is fixed-focus, this will be 0.

ACAMERA_LENS_INFO_SHADING_MAP_SIZE

Dimensions of lens shading map.

Type: int32[2]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

The map should be on the order of 30-40 rows and columns, and must be smaller than 64x64.

ACAMERA_LENS_INTRINSIC_CALIBRATION

The parameters for this camera device's intrinsic calibration.

Type: float[5]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics
  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks

The five calibration parameters that describe the transform from camera-centric 3D coordinates to sensor pixel coordinates:

[f_x, f_y, c_x, c_y, s]

Where f_x and f_y are the horizontal and vertical focal lengths, [c_x, c_y] is the position of the optical axis, and s is a skew parameter for the sensor plane not being aligned with the lens plane.

These are typically used within a transformation matrix K:

K = [ f_x,   s, c_x,
       0, f_y, c_y,
       0    0,   1 ]

which can then be combined with the camera pose rotation R and translation t (ACAMERA_LENS_POSE_ROTATION and ACAMERA_LENS_POSE_TRANSLATION, respective) to calculate the complete transform from world coordinates to pixel coordinates:

P = [ K 0   * [ R t
     0 1 ]     0 1 ]

and with p_w being a point in the world coordinate system and p_s being a point in the camera active pixel array coordinate system, and with the mapping including the homogeneous division by z:

 p_h = (x_h, y_h, z_h) = P p_w
p_s = p_h / z_h

so [x_s, y_s] is the pixel coordinates of the world point, z_s = 1, and w_s is a measurement of disparity (depth) in pixel coordinates.

Note that the coordinate system for this transform is the ACAMERA_SENSOR_INFO_PRE_CORRECTION_ACTIVE_ARRAY_SIZE system, where (0,0) is the top-left of the preCorrectionActiveArraySize rectangle. Once the pose and intrinsic calibration transforms have been applied to a world point, then the ACAMERA_LENS_DISTORTION transform needs to be applied, and the result adjusted to be in the ACAMERA_SENSOR_INFO_ACTIVE_ARRAY_SIZE coordinate system (where (0, 0) is the top-left of the activeArraySize rectangle), to determine the final pixel coordinate of the world point for processed (non-RAW) output buffers.

See also: ACAMERA_LENS_DISTORTION See also: ACAMERA_LENS_POSE_ROTATION See also: ACAMERA_LENS_POSE_TRANSLATION See also: ACAMERA_SENSOR_INFO_ACTIVE_ARRAY_SIZE See also: ACAMERA_SENSOR_INFO_PRE_CORRECTION_ACTIVE_ARRAY_SIZE

ACAMERA_LENS_OPTICAL_STABILIZATION_MODE

Sets whether the camera device uses optical image stabilization (OIS) when capturing images.

Type: byte (acamera_metadata_enum_android_lens_optical_stabilization_mode_t)

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

OIS is used to compensate for motion blur due to small movements of the camera during capture. Unlike digital image stabilization (ACAMERA_CONTROL_VIDEO_STABILIZATION_MODE), OIS makes use of mechanical elements to stabilize the camera sensor, and thus allows for longer exposure times before camera shake becomes apparent.

Switching between different optical stabilization modes may take several frames to initialize, the camera device will report the current mode in capture result metadata. For example, When "ON" mode is requested, the optical stabilization modes in the first several capture results may still be "OFF", and it will become "ON" when the initialization is done.

If a camera device supports both OIS and digital image stabilization (ACAMERA_CONTROL_VIDEO_STABILIZATION_MODE), turning both modes on may produce undesirable interaction, so it is recommended not to enable both at the same time.

Not all devices will support OIS; see ACAMERA_LENS_INFO_AVAILABLE_OPTICAL_STABILIZATION for available controls.

See also: ACAMERA_CONTROL_VIDEO_STABILIZATION_MODE See also: ACAMERA_LENS_INFO_AVAILABLE_OPTICAL_STABILIZATION

ACAMERA_LENS_POSE_REFERENCE

The origin for ACAMERA_LENS_POSE_TRANSLATION.

See also: ACAMERA_LENS_POSE_TRANSLATION

Type: byte (acamera_metadata_enum_android_lens_pose_reference_t)

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

Different calibration methods and use cases can produce better or worse results depending on the selected coordinate origin.

ACAMERA_LENS_POSE_ROTATION

The orientation of the camera relative to the sensor coordinate system.

Type: float[4]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics
  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks

The four coefficients that describe the quaternion rotation from the Android sensor coordinate system to a camera-aligned coordinate system where the X-axis is aligned with the long side of the image sensor, the Y-axis is aligned with the short side of the image sensor, and the Z-axis is aligned with the optical axis of the sensor.

To convert from the quaternion coefficients (x,y,z,w) to the axis of rotation (a_x, a_y, a_z) and rotation amount theta, the following formulas can be used:

 theta = 2 * acos(w)
a_x = x / sin(theta/2)
a_y = y / sin(theta/2)
a_z = z / sin(theta/2)

To create a 3x3 rotation matrix that applies the rotation defined by this quaternion, the following matrix can be used:

R = [ 1 - 2y^2 - 2z^2,       2xy - 2zw,       2xz + 2yw,
           2xy + 2zw, 1 - 2x^2 - 2z^2,       2yz - 2xw,
           2xz - 2yw,       2yz + 2xw, 1 - 2x^2 - 2y^2 ]

This matrix can then be used to apply the rotation to a column vector point with

p' = Rp

where p is in the device sensor coordinate system, and p' is in the camera-oriented coordinate system.

ACAMERA_LENS_POSE_TRANSLATION

Position of the camera optical center.

Type: float[3]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics
  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks

The position of the camera device's lens optical center, as a three-dimensional vector (x,y,z).

Prior to Android P, or when ACAMERA_LENS_POSE_REFERENCE is PRIMARY_CAMERA, this position is relative to the optical center of the largest camera device facing in the same direction as this camera, in the Android sensor coordinate axes. Note that only the axis definitions are shared with the sensor coordinate system, but not the origin.

If this device is the largest or only camera device with a given facing, then this position will be (0, 0, 0); a camera device with a lens optical center located 3 cm from the main sensor along the +X axis (to the right from the user's perspective) will report (0.03, 0, 0).

To transform a pixel coordinates between two cameras facing the same direction, first the source camera ACAMERA_LENS_DISTORTION must be corrected for. Then the source camera ACAMERA_LENS_INTRINSIC_CALIBRATION needs to be applied, followed by the ACAMERA_LENS_POSE_ROTATION of the source camera, the translation of the source camera relative to the destination camera, the ACAMERA_LENS_POSE_ROTATION of the destination camera, and finally the inverse of ACAMERA_LENS_INTRINSIC_CALIBRATION of the destination camera. This obtains a radial-distortion-free coordinate in the destination camera pixel coordinates.

To compare this against a real image from the destination camera, the destination camera image then needs to be corrected for radial distortion before comparison or sampling.

When ACAMERA_LENS_POSE_REFERENCE is GYROSCOPE, then this position is relative to the center of the primary gyroscope on the device.

See also: ACAMERA_LENS_DISTORTION See also: ACAMERA_LENS_INTRINSIC_CALIBRATION See also: ACAMERA_LENS_POSE_REFERENCE See also: ACAMERA_LENS_POSE_ROTATION

ACAMERA_LENS_RADIAL_DISTORTION
ACAMERA_LENS_STATE

Current lens status.

Type: byte (acamera_metadata_enum_android_lens_state_t)

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks

For lens parameters ACAMERA_LENS_FOCAL_LENGTH, ACAMERA_LENS_FOCUS_DISTANCE, ACAMERA_LENS_FILTER_DENSITY and ACAMERA_LENS_APERTURE, when changes are requested, they may take several frames to reach the requested values. This state indicates the current status of the lens parameters.

When the state is STATIONARY, the lens parameters are not changing. This could be either because the parameters are all fixed, or because the lens has had enough time to reach the most recently-requested values. If all these lens parameters are not changable for a camera device, as listed below:

  • Fixed focus (ACAMERA_LENS_INFO_MINIMUM_FOCUS_DISTANCE == 0), which means ACAMERA_LENS_FOCUS_DISTANCE parameter will always be 0.
  • Fixed focal length (ACAMERA_LENS_INFO_AVAILABLE_FOCAL_LENGTHS contains single value), which means the optical zoom is not supported.
  • No ND filter (ACAMERA_LENS_INFO_AVAILABLE_FILTER_DENSITIES contains only 0).
  • Fixed aperture (ACAMERA_LENS_INFO_AVAILABLE_APERTURES contains single value).

Then this state will always be STATIONARY.

When the state is MOVING, it indicates that at least one of the lens parameters is changing.

See also: ACAMERA_LENS_APERTURE See also: ACAMERA_LENS_FILTER_DENSITY See also: ACAMERA_LENS_FOCAL_LENGTH See also: ACAMERA_LENS_FOCUS_DISTANCE See also: ACAMERA_LENS_INFO_AVAILABLE_APERTURES See also: ACAMERA_LENS_INFO_AVAILABLE_FILTER_DENSITIES See also: ACAMERA_LENS_INFO_AVAILABLE_FOCAL_LENGTHS See also: ACAMERA_LENS_INFO_MINIMUM_FOCUS_DISTANCE

ACAMERA_LOGICAL_MULTI_CAMERA_END
ACAMERA_LOGICAL_MULTI_CAMERA_SENSOR_SYNC_TYPE

The accuracy of frame timestamp synchronization between physical cameras

Type: byte (acamera_metadata_enum_android_logical_multi_camera_sensor_sync_type_t)

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

The accuracy of the frame timestamp synchronization determines the physical cameras' ability to start exposure at the same time. If the sensorSyncType is CALIBRATED, the physical camera sensors usually run in master-slave mode so that their shutter time is synchronized. For APPROXIMATE sensorSyncType, the camera sensors usually run in master-master mode, and there could be offset between their start of exposure.

In both cases, all images generated for a particular capture request still carry the same timestamps, so that they can be used to look up the matching frame number and onCaptureStarted callback.

ACAMERA_NOISE_REDUCTION_AVAILABLE_NOISE_REDUCTION_MODES

List of noise reduction modes for ACAMERA_NOISE_REDUCTION_MODE that are supported by this camera device.

See also: ACAMERA_NOISE_REDUCTION_MODE

Type: byte[n]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

Full-capability camera devices will always support OFF and FAST.

Camera devices that support YUV_REPROCESSING or PRIVATE_REPROCESSING will support ZERO_SHUTTER_LAG.

Legacy-capability camera devices will only support FAST mode.

ACAMERA_NOISE_REDUCTION_END
ACAMERA_NOISE_REDUCTION_MODE

Mode of operation for the noise reduction algorithm.

Type: byte (acamera_metadata_enum_android_noise_reduction_mode_t)

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

The noise reduction algorithm attempts to improve image quality by removing excessive noise added by the capture process, especially in dark conditions.

OFF means no noise reduction will be applied by the camera device, for both raw and YUV domain.

MINIMAL means that only sensor raw domain basic noise reduction is enabled ,to remove demosaicing or other processing artifacts. For YUV_REPROCESSING, MINIMAL is same as OFF. This mode is optional, may not be support by all devices. The application should check ACAMERA_NOISE_REDUCTION_AVAILABLE_NOISE_REDUCTION_MODES before using it.

FAST/HIGH_QUALITY both mean camera device determined noise filtering will be applied. HIGH_QUALITY mode indicates that the camera device will use the highest-quality noise filtering algorithms, even if it slows down capture rate. FAST means the camera device will not slow down capture rate when applying noise filtering. FAST may be the same as MINIMAL if MINIMAL is listed, or the same as OFF if any noise filtering will slow down capture rate. Every output stream will have a similar amount of enhancement applied.

ZERO_SHUTTER_LAG is meant to be used by applications that maintain a continuous circular buffer of high-resolution images during preview and reprocess image(s) from that buffer into a final capture when triggered by the user. In this mode, the camera device applies noise reduction to low-resolution streams (below maximum recording resolution) to maximize preview quality, but does not apply noise reduction to high-resolution streams, since those will be reprocessed later if necessary.

For YUV_REPROCESSING, these FAST/HIGH_QUALITY modes both mean that the camera device will apply FAST/HIGH_QUALITY YUV domain noise reduction, respectively. The camera device may adjust the noise reduction parameters for best image quality based on the android.reprocess.effectiveExposureFactor if it is set.

See also: ACAMERA_NOISE_REDUCTION_AVAILABLE_NOISE_REDUCTION_MODES

ACAMERA_REQUEST_AVAILABLE_CAPABILITIES

List of capabilities that this camera device advertises as fully supporting.

Type: byte[n] (acamera_metadata_enum_android_request_available_capabilities_t)

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

A capability is a contract that the camera device makes in order to be able to satisfy one or more use cases.

Listing a capability guarantees that the whole set of features required to support a common use will all be available.

Using a subset of the functionality provided by an unsupported capability may be possible on a specific camera device implementation; to do this query each of ACAMERA_REQUEST_AVAILABLE_REQUEST_KEYS, ACAMERA_REQUEST_AVAILABLE_RESULT_KEYS, ACAMERA_REQUEST_AVAILABLE_CHARACTERISTICS_KEYS.

The following capabilities are guaranteed to be available on ACAMERA_INFO_SUPPORTED_HARDWARE_LEVEL == FULL devices:

  • MANUAL_SENSOR
  • MANUAL_POST_PROCESSING

Other capabilities may be available on either FULL or LIMITED devices, but the application should query this key to be sure.

See also: ACAMERA_INFO_SUPPORTED_HARDWARE_LEVEL See also: ACAMERA_REQUEST_AVAILABLE_CHARACTERISTICS_KEYS See also: ACAMERA_REQUEST_AVAILABLE_REQUEST_KEYS See also: ACAMERA_REQUEST_AVAILABLE_RESULT_KEYS

ACAMERA_REQUEST_AVAILABLE_CHARACTERISTICS_KEYS

A list of all keys that the camera device has available to use with ACameraManager_getCameraCharacteristics.

Type: int32[n]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

This entry follows the same rules as ACAMERA_REQUEST_AVAILABLE_RESULT_KEYS (except that it applies for CameraCharacteristics instead of CaptureResult). See above for more details.

See also: ACAMERA_REQUEST_AVAILABLE_RESULT_KEYS

ACAMERA_REQUEST_AVAILABLE_REQUEST_KEYS

A list of all keys that the camera device has available to use with ACaptureRequest.

Type: int32[n]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

Attempting to set a key into a CaptureRequest that is not listed here will result in an invalid request and will be rejected by the camera device.

This field can be used to query the feature set of a camera device at a more granular level than capabilities. This is especially important for optional keys that are not listed under any capability in ACAMERA_REQUEST_AVAILABLE_CAPABILITIES.

See also: ACAMERA_REQUEST_AVAILABLE_CAPABILITIES

ACAMERA_REQUEST_AVAILABLE_RESULT_KEYS

A list of all keys that the camera device has available to use with ACameraCaptureSession_captureCallback_result.

Type: int32[n]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

Attempting to get a key from a CaptureResult that is not listed here will always return a null value. Getting a key from a CaptureResult that is listed here will generally never return a null value.

The following keys may return null unless they are enabled:

  • ACAMERA_STATISTICS_LENS_SHADING_MAP (non-null iff ACAMERA_STATISTICS_LENS_SHADING_MAP_MODE == ON)

(Those sometimes-null keys will nevertheless be listed here if they are available.)

This field can be used to query the feature set of a camera device at a more granular level than capabilities. This is especially important for optional keys that are not listed under any capability in ACAMERA_REQUEST_AVAILABLE_CAPABILITIES.

See also: ACAMERA_REQUEST_AVAILABLE_CAPABILITIES See also: ACAMERA_STATISTICS_LENS_SHADING_MAP See also: ACAMERA_STATISTICS_LENS_SHADING_MAP_MODE

ACAMERA_REQUEST_AVAILABLE_SESSION_KEYS

A subset of the available request keys that the camera device can pass as part of the capture session initialization.

Type: int32[n]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

This is a subset of ACAMERA_REQUEST_AVAILABLE_REQUEST_KEYS which contains a list of keys that are difficult to apply per-frame and can result in unexpected delays when modified during the capture session lifetime. Typical examples include parameters that require a time-consuming hardware re-configuration or internal camera pipeline change. For performance reasons we advise clients to pass their initial values as part of ACameraDevice_createCaptureSessionWithSessionParameters. Once the camera capture session is enabled it is also recommended to avoid changing them from their initial values set in ACameraDevice_createCaptureSessionWithSessionParameters. Control over session parameters can still be exerted in capture requests but clients should be aware and expect delays during their application. An example usage scenario could look like this:

  • The camera client starts by quering the session parameter key list via ACameraManager_getCameraCharacteristics.
  • Before triggering the capture session create sequence, a capture request must be built via ACameraDevice_createCaptureRequest using an appropriate template matching the particular use case.
  • The client should go over the list of session parameters and check whether some of the keys listed matches with the parameters that they intend to modify as part of the first capture request.
  • If there is no such match, the capture request can be passed unmodified to ACameraDevice_createCaptureSessionWithSessionParameters.
  • If matches do exist, the client should update the respective values and pass the request to ACameraDevice_createCaptureSessionWithSessionParameters.
  • After the capture session initialization completes the session parameter key list can continue to serve as reference when posting or updating further requests. As mentioned above further changes to session parameters should ideally be avoided, if updates are necessary however clients could expect a delay/glitch during the parameter switch.

See also: ACAMERA_REQUEST_AVAILABLE_REQUEST_KEYS

ACAMERA_REQUEST_END
ACAMERA_REQUEST_MAX_NUM_OUTPUT_STREAMS

The maximum numbers of different types of output streams that can be configured and used simultaneously by a camera device.

Type: int32[3]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

This is a 3 element tuple that contains the max number of output simultaneous streams for raw sensor, processed (but not stalling), and processed (and stalling) formats respectively. For example, assuming that JPEG is typically a processed and stalling stream, if max raw sensor format output stream number is 1, max YUV streams number is 3, and max JPEG stream number is 2, then this tuple should be (1, 3, 2).

This lists the upper bound of the number of output streams supported by the camera device. Using more streams simultaneously may require more hardware and CPU resources that will consume more power. The image format for an output stream can be any supported format provided by ACAMERA_SCALER_AVAILABLE_STREAM_CONFIGURATIONS. The formats defined in ACAMERA_SCALER_AVAILABLE_STREAM_CONFIGURATIONS can be catergorized into the 3 stream types as below:

  • Processed (but stalling): any non-RAW format with a stallDurations > 0. Typically JPEG format.
  • Raw formats: RAW_SENSOR, RAW10, or RAW12.
  • Processed (but not-stalling): any non-RAW format without a stall duration. Typically YUV_420_888, NV21, or YV12.

See also: ACAMERA_SCALER_AVAILABLE_STREAM_CONFIGURATIONS

ACAMERA_REQUEST_PARTIAL_RESULT_COUNT

Defines how many sub-components a result will be composed of.

Type: int32

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

In order to combat the pipeline latency, partial results may be delivered to the application layer from the camera device as soon as they are available.

Optional; defaults to 1. A value of 1 means that partial results are not supported, and only the final TotalCaptureResult will be produced by the camera device.

A typical use case for this might be: after requesting an auto-focus (AF) lock the new AF state might be available 50% of the way through the pipeline. The camera device could then immediately dispatch this state via a partial result to the application, and the rest of the metadata via later partial results.

ACAMERA_REQUEST_PIPELINE_DEPTH

Specifies the number of pipeline stages the frame went through from when it was exposed to when the final completed result was available to the framework.

Type: byte

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks

Depending on what settings are used in the request, and what streams are configured, the data may undergo less processing, and some pipeline stages skipped.

See ACAMERA_REQUEST_PIPELINE_MAX_DEPTH for more details.

See also: ACAMERA_REQUEST_PIPELINE_MAX_DEPTH

ACAMERA_REQUEST_PIPELINE_MAX_DEPTH

Specifies the number of maximum pipeline stages a frame has to go through from when it's exposed to when it's available to the framework.

Type: byte

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

A typical minimum value for this is 2 (one stage to expose, one stage to readout) from the sensor. The ISP then usually adds its own stages to do custom HW processing. Further stages may be added by SW processing.

Depending on what settings are used (e.g. YUV, JPEG) and what processing is enabled (e.g. face detection), the actual pipeline depth (specified by ACAMERA_REQUEST_PIPELINE_DEPTH) may be less than the max pipeline depth.

A pipeline depth of X stages is equivalent to a pipeline latency of X frame intervals.

This value will normally be 8 or less, however, for high speed capture session, the max pipeline depth will be up to 8 x size of high speed capture request list.

See also: ACAMERA_REQUEST_PIPELINE_DEPTH

ACAMERA_SCALER_AVAILABLE_MAX_DIGITAL_ZOOM

The maximum ratio between both active area width and crop region width, and active area height and crop region height, for ACAMERA_SCALER_CROP_REGION.

See also: ACAMERA_SCALER_CROP_REGION

Type: float

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

This represents the maximum amount of zooming possible by the camera device, or equivalently, the minimum cropping window size.

Crop regions that have a width or height that is smaller than this ratio allows will be rounded up to the minimum allowed size by the camera device.

ACAMERA_SCALER_AVAILABLE_MIN_FRAME_DURATIONS

This lists the minimum frame duration for each format/size combination.

Type: int64[4*n]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

This should correspond to the frame duration when only that stream is active, with all processing (typically in android.*.mode) set to either OFF or FAST.

When multiple streams are used in a request, the minimum frame duration will be max(individual stream min durations).

The minimum frame duration of a stream (of a particular format, size) is the same regardless of whether the stream is input or output.

See ACAMERA_SENSOR_FRAME_DURATION and ACAMERA_SCALER_AVAILABLE_STALL_DURATIONS for more details about calculating the max frame rate.

See also: ACAMERA_SCALER_AVAILABLE_STALL_DURATIONS See also: ACAMERA_SENSOR_FRAME_DURATION

ACAMERA_SCALER_AVAILABLE_STALL_DURATIONS

This lists the maximum stall duration for each output format/size combination.

Type: int64[4*n]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

A stall duration is how much extra time would get added to the normal minimum frame duration for a repeating request that has streams with non-zero stall.

For example, consider JPEG captures which have the following characteristics:

  • JPEG streams act like processed YUV streams in requests for which they are not included; in requests in which they are directly referenced, they act as JPEG streams. This is because supporting a JPEG stream requires the underlying YUV data to always be ready for use by a JPEG encoder, but the encoder will only be used (and impact frame duration) on requests that actually reference a JPEG stream.
  • The JPEG processor can run concurrently to the rest of the camera pipeline, but cannot process more than 1 capture at a time.

In other words, using a repeating YUV request would result in a steady frame rate (let's say it's 30 FPS). If a single JPEG request is submitted periodically, the frame rate will stay at 30 FPS (as long as we wait for the previous JPEG to return each time). If we try to submit a repeating YUV + JPEG request, then the frame rate will drop from 30 FPS.

In general, submitting a new request with a non-0 stall time stream will not cause a frame rate drop unless there are still outstanding buffers for that stream from previous requests.

Submitting a repeating request with streams (call this S) is the same as setting the minimum frame duration from the normal minimum frame duration corresponding to S, added with the maximum stall duration for S.

If interleaving requests with and without a stall duration, a request will stall by the maximum of the remaining times for each can-stall stream with outstanding buffers.

This means that a stalling request will not have an exposure start until the stall has completed.

This should correspond to the stall duration when only that stream is active, with all processing (typically in android.*.mode) set to FAST or OFF. Setting any of the processing modes to HIGH_QUALITY effectively results in an indeterminate stall duration for all streams in a request (the regular stall calculation rules are ignored).

The following formats may always have a stall duration:

The following formats will never have a stall duration:

All other formats may or may not have an allowed stall duration on a per-capability basis; refer to ACAMERA_REQUEST_AVAILABLE_CAPABILITIES for more details.

See ACAMERA_SENSOR_FRAME_DURATION for more information about calculating the max frame rate (absent stalls).

See also: ACAMERA_REQUEST_AVAILABLE_CAPABILITIES See also: ACAMERA_SENSOR_FRAME_DURATION

ACAMERA_SCALER_AVAILABLE_STREAM_CONFIGURATIONS

The available stream configurations that this camera device supports (i.e. format, width, height, output/input stream).

Type: int32[n*4] (acamera_metadata_enum_android_scaler_available_stream_configurations_t)

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

The configurations are listed as (format, width, height, input?) tuples.

For a given use case, the actual maximum supported resolution may be lower than what is listed here, depending on the destination Surface for the image data. For example, for recording video, the video encoder chosen may have a maximum size limit (e.g. 1080p) smaller than what the camera (e.g. maximum resolution is 3264x2448) can provide.

Please reference the documentation for the image data destination to check if it limits the maximum size for image data.

Not all output formats may be supported in a configuration with an input stream of a particular format. For more details, see android.scaler.availableInputOutputFormatsMap.

The following table describes the minimum required output stream configurations based on the hardware level (ACAMERA_INFO_SUPPORTED_HARDWARE_LEVEL):

Format | Size | Hardware Level | Notes :----------:|:-----------------------------------------:|:-----------:|:-----------: JPEG | ACAMERA_SENSOR_INFO_ACTIVE_ARRAY_SIZE | Any | JPEG | 1920x1080 (1080p) | Any | if 1080p <= activeArraySize JPEG | 1280x720 (720) | Any | if 720p <= activeArraySize JPEG | 640x480 (480p) | Any | if 480p <= activeArraySize JPEG | 320x240 (240p) | Any | if 240p <= activeArraySize YUV_420_888 | all output sizes available for JPEG | FULL | YUV_420_888 | all output sizes available for JPEG, up to the maximum video size | LIMITED | IMPLEMENTATION_DEFINED | same as YUV_420_888 | Any |

Refer to ACAMERA_REQUEST_AVAILABLE_CAPABILITIES for additional mandatory stream configurations on a per-capability basis.

See also: ACAMERA_INFO_SUPPORTED_HARDWARE_LEVEL See also: ACAMERA_REQUEST_AVAILABLE_CAPABILITIES See also: ACAMERA_SENSOR_INFO_ACTIVE_ARRAY_SIZE

ACAMERA_SCALER_CROPPING_TYPE

The crop type that this camera device supports.

Type: byte (acamera_metadata_enum_android_scaler_cropping_type_t)

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

When passing a non-centered crop region (ACAMERA_SCALER_CROP_REGION) to a camera device that only supports CENTER_ONLY cropping, the camera device will move the crop region to the center of the sensor active array (ACAMERA_SENSOR_INFO_ACTIVE_ARRAY_SIZE) and keep the crop region width and height unchanged. The camera device will return the final used crop region in metadata result ACAMERA_SCALER_CROP_REGION.

Camera devices that support FREEFORM cropping will support any crop region that is inside of the active array. The camera device will apply the same crop region and return the final used crop region in capture result metadata ACAMERA_SCALER_CROP_REGION.

LEGACY capability devices will only support CENTER_ONLY cropping.

See also: ACAMERA_SCALER_CROP_REGION See also: ACAMERA_SENSOR_INFO_ACTIVE_ARRAY_SIZE

ACAMERA_SCALER_CROP_REGION

The desired region of the sensor to read out for this capture.

Type: int32[4]

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

This control can be used to implement digital zoom.

The crop region coordinate system is based off ACAMERA_SENSOR_INFO_ACTIVE_ARRAY_SIZE, with (0, 0) being the top-left corner of the sensor active array.

Output streams use this rectangle to produce their output, cropping to a smaller region if necessary to maintain the stream's aspect ratio, then scaling the sensor input to match the output's configured resolution.

The crop region is applied after the RAW to other color space (e.g. YUV) conversion. Since raw streams (e.g. RAW16) don't have the conversion stage, they are not croppable. The crop region will be ignored by raw streams.

For non-raw streams, any additional per-stream cropping will be done to maximize the final pixel area of the stream.

For example, if the crop region is set to a 4:3 aspect ratio, then 4:3 streams will use the exact crop region. 16:9 streams will further crop vertically (letterbox).

Conversely, if the crop region is set to a 16:9, then 4:3 outputs will crop horizontally (pillarbox), and 16:9 streams will match exactly. These additional crops will be centered within the crop region.

The width and height of the crop region cannot be set to be smaller than floor( activeArraySize.width / ACAMERA_SCALER_AVAILABLE_MAX_DIGITAL_ZOOM ) and floor( activeArraySize.height / ACAMERA_SCALER_AVAILABLE_MAX_DIGITAL_ZOOM ), respectively.

The camera device may adjust the crop region to account for rounding and other hardware requirements; the final crop region used will be included in the output capture result.

The data representation is int[4], which maps to (left, top, width, height).

See also: ACAMERA_SCALER_AVAILABLE_MAX_DIGITAL_ZOOM See also: ACAMERA_SENSOR_INFO_ACTIVE_ARRAY_SIZE

ACAMERA_SCALER_END
ACAMERA_SENSOR_AVAILABLE_TEST_PATTERN_MODES

List of sensor test pattern modes for ACAMERA_SENSOR_TEST_PATTERN_MODE supported by this camera device.

See also: ACAMERA_SENSOR_TEST_PATTERN_MODE

Type: int32[n]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

Defaults to OFF, and always includes OFF if defined.

ACAMERA_SENSOR_BLACK_LEVEL_PATTERN

A fixed black level offset for each of the color filter arrangement (CFA) mosaic channels.

Type: int32[4]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

This key specifies the zero light value for each of the CFA mosaic channels in the camera sensor. The maximal value output by the sensor is represented by the value in ACAMERA_SENSOR_INFO_WHITE_LEVEL.

The values are given in the same order as channels listed for the CFA layout key (see ACAMERA_SENSOR_INFO_COLOR_FILTER_ARRANGEMENT), i.e. the nth value given corresponds to the black level offset for the nth color channel listed in the CFA.

The black level values of captured images may vary for different capture settings (e.g., ACAMERA_SENSOR_SENSITIVITY). This key represents a coarse approximation for such case. It is recommended to use ACAMERA_SENSOR_DYNAMIC_BLACK_LEVEL or use pixels from ACAMERA_SENSOR_OPTICAL_BLACK_REGIONS directly for captures when supported by the camera device, which provides more accurate black level values. For raw capture in particular, it is recommended to use pixels from ACAMERA_SENSOR_OPTICAL_BLACK_REGIONS to calculate black level values for each frame.

See also: ACAMERA_SENSOR_DYNAMIC_BLACK_LEVEL See also: ACAMERA_SENSOR_INFO_COLOR_FILTER_ARRANGEMENT See also: ACAMERA_SENSOR_INFO_WHITE_LEVEL See also: ACAMERA_SENSOR_OPTICAL_BLACK_REGIONS See also: ACAMERA_SENSOR_SENSITIVITY

ACAMERA_SENSOR_CALIBRATION_TRANSFORM1

A per-device calibration transform matrix that maps from the reference sensor colorspace to the actual device sensor colorspace.

Type: rational[3*3]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

This matrix is used to correct for per-device variations in the sensor colorspace, and is used for processing raw buffer data.

The matrix is expressed as a 3x3 matrix in row-major-order, and contains a per-device calibration transform that maps colors from reference sensor color space (i.e. the "golden module" colorspace) into this camera device's native sensor color space under the first reference illuminant (ACAMERA_SENSOR_REFERENCE_ILLUMINANT1).

See also: ACAMERA_SENSOR_REFERENCE_ILLUMINANT1

ACAMERA_SENSOR_CALIBRATION_TRANSFORM2

A per-device calibration transform matrix that maps from the reference sensor colorspace to the actual device sensor colorspace (this is the colorspace of the raw buffer data).

Type: rational[3*3]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

This matrix is used to correct for per-device variations in the sensor colorspace, and is used for processing raw buffer data.

The matrix is expressed as a 3x3 matrix in row-major-order, and contains a per-device calibration transform that maps colors from reference sensor color space (i.e. the "golden module" colorspace) into this camera device's native sensor color space under the second reference illuminant (ACAMERA_SENSOR_REFERENCE_ILLUMINANT2).

This matrix will only be present if the second reference illuminant is present.

See also: ACAMERA_SENSOR_REFERENCE_ILLUMINANT2

ACAMERA_SENSOR_COLOR_TRANSFORM1

A matrix that transforms color values from CIE XYZ color space to reference sensor color space.

Type: rational[3*3]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

This matrix is used to convert from the standard CIE XYZ color space to the reference sensor colorspace, and is used when processing raw buffer data.

The matrix is expressed as a 3x3 matrix in row-major-order, and contains a color transform matrix that maps colors from the CIE XYZ color space to the reference sensor color space (i.e. the "golden module" colorspace) under the first reference illuminant (ACAMERA_SENSOR_REFERENCE_ILLUMINANT1).

The white points chosen in both the reference sensor color space and the CIE XYZ colorspace when calculating this transform will match the standard white point for the first reference illuminant (i.e. no chromatic adaptation will be applied by this transform).

See also: ACAMERA_SENSOR_REFERENCE_ILLUMINANT1

ACAMERA_SENSOR_COLOR_TRANSFORM2

A matrix that transforms color values from CIE XYZ color space to reference sensor color space.

Type: rational[3*3]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

This matrix is used to convert from the standard CIE XYZ color space to the reference sensor colorspace, and is used when processing raw buffer data.

The matrix is expressed as a 3x3 matrix in row-major-order, and contains a color transform matrix that maps colors from the CIE XYZ color space to the reference sensor color space (i.e. the "golden module" colorspace) under the second reference illuminant (ACAMERA_SENSOR_REFERENCE_ILLUMINANT2).

The white points chosen in both the reference sensor color space and the CIE XYZ colorspace when calculating this transform will match the standard white point for the second reference illuminant (i.e. no chromatic adaptation will be applied by this transform).

This matrix will only be present if the second reference illuminant is present.

See also: ACAMERA_SENSOR_REFERENCE_ILLUMINANT2

ACAMERA_SENSOR_DYNAMIC_BLACK_LEVEL

A per-frame dynamic black level offset for each of the color filter arrangement (CFA) mosaic channels.

Type: float[4]

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks

Camera sensor black levels may vary dramatically for different capture settings (e.g. ACAMERA_SENSOR_SENSITIVITY). The fixed black level reported by ACAMERA_SENSOR_BLACK_LEVEL_PATTERN may be too inaccurate to represent the actual value on a per-frame basis. The camera device internal pipeline relies on reliable black level values to process the raw images appropriately. To get the best image quality, the camera device may choose to estimate the per frame black level values either based on optically shielded black regions (ACAMERA_SENSOR_OPTICAL_BLACK_REGIONS) or its internal model.

This key reports the camera device estimated per-frame zero light value for each of the CFA mosaic channels in the camera sensor. The ACAMERA_SENSOR_BLACK_LEVEL_PATTERN may only represent a coarse approximation of the actual black level values. This value is the black level used in camera device internal image processing pipeline and generally more accurate than the fixed black level values. However, since they are estimated values by the camera device, they may not be as accurate as the black level values calculated from the optical black pixels reported by ACAMERA_SENSOR_OPTICAL_BLACK_REGIONS.

The values are given in the same order as channels listed for the CFA layout key (see ACAMERA_SENSOR_INFO_COLOR_FILTER_ARRANGEMENT), i.e. the nth value given corresponds to the black level offset for the nth color channel listed in the CFA.

This key will be available if ACAMERA_SENSOR_OPTICAL_BLACK_REGIONS is available or the camera device advertises this key via ACAMERA_REQUEST_AVAILABLE_RESULT_KEYS.

See also: ACAMERA_SENSOR_BLACK_LEVEL_PATTERN See also: ACAMERA_SENSOR_INFO_COLOR_FILTER_ARRANGEMENT See also: ACAMERA_SENSOR_OPTICAL_BLACK_REGIONS See also: ACAMERA_SENSOR_SENSITIVITY

ACAMERA_SENSOR_DYNAMIC_WHITE_LEVEL

Maximum raw value output by sensor for this frame.

Type: int32

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks

Since the ACAMERA_SENSOR_BLACK_LEVEL_PATTERN may change for different capture settings (e.g., ACAMERA_SENSOR_SENSITIVITY), the white level will change accordingly. This key is similar to ACAMERA_SENSOR_INFO_WHITE_LEVEL, but specifies the camera device estimated white level for each frame.

This key will be available if ACAMERA_SENSOR_OPTICAL_BLACK_REGIONS is available or the camera device advertises this key via ACAMERA_REQUEST_AVAILABLE_RESULT_KEYS.

See also: ACAMERA_SENSOR_BLACK_LEVEL_PATTERN See also: ACAMERA_SENSOR_INFO_WHITE_LEVEL See also: ACAMERA_SENSOR_OPTICAL_BLACK_REGIONS See also: ACAMERA_SENSOR_SENSITIVITY

ACAMERA_SENSOR_END
ACAMERA_SENSOR_EXPOSURE_TIME

Duration each pixel is exposed to light.

Type: int64

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

If the sensor can't expose this exact duration, it will shorten the duration exposed to the nearest possible value (rather than expose longer). The final exposure time used will be available in the output capture result.

This control is only effective if ACAMERA_CONTROL_AE_MODE or ACAMERA_CONTROL_MODE is set to OFF; otherwise the auto-exposure algorithm will override this value.

See also: ACAMERA_CONTROL_AE_MODE See also: ACAMERA_CONTROL_MODE

ACAMERA_SENSOR_FORWARD_MATRIX1

A matrix that transforms white balanced camera colors from the reference sensor colorspace to the CIE XYZ colorspace with a D50 whitepoint.

Type: rational[3*3]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

This matrix is used to convert to the standard CIE XYZ colorspace, and is used when processing raw buffer data.

This matrix is expressed as a 3x3 matrix in row-major-order, and contains a color transform matrix that maps white balanced colors from the reference sensor color space to the CIE XYZ color space with a D50 white point.

Under the first reference illuminant (ACAMERA_SENSOR_REFERENCE_ILLUMINANT1) this matrix is chosen so that the standard white point for this reference illuminant in the reference sensor colorspace is mapped to D50 in the CIE XYZ colorspace.

See also: ACAMERA_SENSOR_REFERENCE_ILLUMINANT1

ACAMERA_SENSOR_FORWARD_MATRIX2

A matrix that transforms white balanced camera colors from the reference sensor colorspace to the CIE XYZ colorspace with a D50 whitepoint.

Type: rational[3*3]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

This matrix is used to convert to the standard CIE XYZ colorspace, and is used when processing raw buffer data.

This matrix is expressed as a 3x3 matrix in row-major-order, and contains a color transform matrix that maps white balanced colors from the reference sensor color space to the CIE XYZ color space with a D50 white point.

Under the second reference illuminant (ACAMERA_SENSOR_REFERENCE_ILLUMINANT2) this matrix is chosen so that the standard white point for this reference illuminant in the reference sensor colorspace is mapped to D50 in the CIE XYZ colorspace.

This matrix will only be present if the second reference illuminant is present.

See also: ACAMERA_SENSOR_REFERENCE_ILLUMINANT2

ACAMERA_SENSOR_FRAME_DURATION

Duration from start of frame exposure to start of next frame exposure.

Type: int64

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

The maximum frame rate that can be supported by a camera subsystem is a function of many factors:

  • Requested resolutions of output image streams
  • Availability of binning / skipping modes on the imager
  • The bandwidth of the imager interface
  • The bandwidth of the various ISP processing blocks

Since these factors can vary greatly between different ISPs and sensors, the camera abstraction tries to represent the bandwidth restrictions with as simple a model as possible.

The model presented has the following characteristics:

  • The image sensor is always configured to output the smallest resolution possible given the application's requested output stream sizes. The smallest resolution is defined as being at least as large as the largest requested output stream size; the camera pipeline must never digitally upsample sensor data when the crop region covers the whole sensor. In general, this means that if only small output stream resolutions are configured, the sensor can provide a higher frame rate.
  • Since any request may use any or all the currently configured output streams, the sensor and ISP must be configured to support scaling a single capture to all the streams at the same time. This means the camera pipeline must be ready to produce the largest requested output size without any delay. Therefore, the overall frame rate of a given configured stream set is governed only by the largest requested stream resolution.
  • Using more than one output stream in a request does not affect the frame duration.
  • Certain format-streams may need to do additional background processing before data is consumed/produced by that stream. These processors can run concurrently to the rest of the camera pipeline, but cannot process more than 1 capture at a time.

The necessary information for the application, given the model above, is provided via ACAMERA_SCALER_AVAILABLE_MIN_FRAME_DURATIONS. These are used to determine the maximum frame rate / minimum frame duration that is possible for a given stream configuration.

Specifically, the application can use the following rules to determine the minimum frame duration it can request from the camera device:

  1. Let the set of currently configured input/output streams be called S.
  2. Find the minimum frame durations for each stream in S, by looking it up in ACAMERA_SCALER_AVAILABLE_MIN_FRAME_DURATIONS (with its respective size/format). Let this set of frame durations be called F.
  3. For any given request R, the minimum frame duration allowed for R is the maximum out of all values in F. Let the streams used in R be called S_r.

If none of the streams in S_r have a stall time (listed in ACAMERA_SCALER_AVAILABLE_STALL_DURATIONS using its respective size/format), then the frame duration in F determines the steady state frame rate that the application will get if it uses R as a repeating request. Let this special kind of request be called Rsimple.

A repeating request Rsimple can be occasionally interleaved by a single capture of a new request Rstall (which has at least one in-use stream with a non-0 stall time) and if Rstall has the same minimum frame duration this will not cause a frame rate loss if all buffers from the previous Rstall have already been delivered.

For more details about stalling, see ACAMERA_SCALER_AVAILABLE_STALL_DURATIONS.

This control is only effective if ACAMERA_CONTROL_AE_MODE or ACAMERA_CONTROL_MODE is set to OFF; otherwise the auto-exposure algorithm will override this value.

See also: ACAMERA_CONTROL_AE_MODE See also: ACAMERA_CONTROL_MODE

ACAMERA_SENSOR_GREEN_SPLIT

The worst-case divergence between Bayer green channels.

Type: float

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks

This value is an estimate of the worst case split between the Bayer green channels in the red and blue rows in the sensor color filter array.

The green split is calculated as follows:

  1. A 5x5 pixel (or larger) window W within the active sensor array is chosen. The term 'pixel' here is taken to mean a group of 4 Bayer mosaic channels (R, Gr, Gb, B). The location and size of the window chosen is implementation defined, and should be chosen to provide a green split estimate that is both representative of the entire image for this camera sensor, and can be calculated quickly.
  2. The arithmetic mean of the green channels from the red rows (mean_Gr) within W is computed.
  3. The arithmetic mean of the green channels from the blue rows (mean_Gb) within W is computed.
  4. The maximum ratio R of the two means is computed as follows: R = max((mean_Gr + 1)/(mean_Gb + 1), (mean_Gb + 1)/(mean_Gr + 1))

The ratio R is the green split divergence reported for this property, which represents how much the green channels differ in the mosaic pattern. This value is typically used to determine the treatment of the green mosaic channels when demosaicing.

The green split value can be roughly interpreted as follows:

  • R < 1.03 is a negligible split (<3% divergence).
  • 1.20 <= R >= 1.03 will require some software correction to avoid demosaic errors (3-20% divergence).
  • R > 1.20 will require strong software correction to produce a usuable image (>20% divergence).

ACAMERA_SENSOR_INFO_ACTIVE_ARRAY_SIZE

The area of the image sensor which corresponds to active pixels after any geometric distortion correction has been applied.

Type: int32[4]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

This is the rectangle representing the size of the active region of the sensor (i.e. the region that actually receives light from the scene) after any geometric correction has been applied, and should be treated as the maximum size in pixels of any of the image output formats aside from the raw formats.

This rectangle is defined relative to the full pixel array; (0,0) is the top-left of the full pixel array, and the size of the full pixel array is given by ACAMERA_SENSOR_INFO_PIXEL_ARRAY_SIZE.

The coordinate system for most other keys that list pixel coordinates, including ACAMERA_SCALER_CROP_REGION, is defined relative to the active array rectangle given in this field, with (0, 0) being the top-left of this rectangle.

The active array may be smaller than the full pixel array, since the full array may include black calibration pixels or other inactive regions, and geometric correction resulting in scaling or cropping may have been applied.

The data representation is int[4], which maps to (left, top, width, height).

See also: ACAMERA_SCALER_CROP_REGION See also: ACAMERA_SENSOR_INFO_PIXEL_ARRAY_SIZE

ACAMERA_SENSOR_INFO_COLOR_FILTER_ARRANGEMENT

The arrangement of color filters on sensor; represents the colors in the top-left 2x2 section of the sensor, in reading order.

Type: byte (acamera_metadata_enum_android_sensor_info_color_filter_arrangement_t)

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

ACAMERA_SENSOR_INFO_END
ACAMERA_SENSOR_INFO_EXPOSURE_TIME_RANGE

The range of image exposure times for ACAMERA_SENSOR_EXPOSURE_TIME supported by this camera device.

See also: ACAMERA_SENSOR_EXPOSURE_TIME

Type: int64[2]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

ACAMERA_SENSOR_INFO_LENS_SHADING_APPLIED

Whether the RAW images output from this camera device are subject to lens shading correction.

Type: byte (acamera_metadata_enum_android_sensor_info_lens_shading_applied_t)

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

If TRUE, all images produced by the camera device in the RAW image formats will have lens shading correction already applied to it. If FALSE, the images will not be adjusted for lens shading correction. See android.request.maxNumOutputRaw for a list of RAW image formats.

This key will be null for all devices do not report this information. Devices with RAW capability will always report this information in this key.

ACAMERA_SENSOR_INFO_MAX_FRAME_DURATION

The maximum possible frame duration (minimum frame rate) for ACAMERA_SENSOR_FRAME_DURATION that is supported this camera device.

See also: ACAMERA_SENSOR_FRAME_DURATION

Type: int64

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

Attempting to use frame durations beyond the maximum will result in the frame duration being clipped to the maximum. See that control for a full definition of frame durations.

Refer to ACAMERA_SCALER_AVAILABLE_MIN_FRAME_DURATIONS for the minimum frame duration values.

ACAMERA_SENSOR_INFO_PHYSICAL_SIZE

The physical dimensions of the full pixel array.

Type: float[2]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

This is the physical size of the sensor pixel array defined by ACAMERA_SENSOR_INFO_PIXEL_ARRAY_SIZE.

See also: ACAMERA_SENSOR_INFO_PIXEL_ARRAY_SIZE

ACAMERA_SENSOR_INFO_PIXEL_ARRAY_SIZE

Dimensions of the full pixel array, possibly including black calibration pixels.

Type: int32[2]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

The pixel count of the full pixel array of the image sensor, which covers ACAMERA_SENSOR_INFO_PHYSICAL_SIZE area. This represents the full pixel dimensions of the raw buffers produced by this sensor.

If a camera device supports raw sensor formats, either this or ACAMERA_SENSOR_INFO_PRE_CORRECTION_ACTIVE_ARRAY_SIZE is the maximum dimensions for the raw output formats listed in ACAMERA_SCALER_AVAILABLE_STREAM_CONFIGURATIONS (this depends on whether or not the image sensor returns buffers containing pixels that are not part of the active array region for blacklevel calibration or other purposes).

Some parts of the full pixel array may not receive light from the scene, or be otherwise inactive. The ACAMERA_SENSOR_INFO_PRE_CORRECTION_ACTIVE_ARRAY_SIZE key defines the rectangle of active pixels that will be included in processed image formats.

See also: ACAMERA_SENSOR_INFO_PHYSICAL_SIZE See also: ACAMERA_SENSOR_INFO_PRE_CORRECTION_ACTIVE_ARRAY_SIZE

ACAMERA_SENSOR_INFO_PRE_CORRECTION_ACTIVE_ARRAY_SIZE

The area of the image sensor which corresponds to active pixels prior to the application of any geometric distortion correction.

Type: int32[4]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

This is the rectangle representing the size of the active region of the sensor (i.e. the region that actually receives light from the scene) before any geometric correction has been applied, and should be treated as the active region rectangle for any of the raw formats. All metadata associated with raw processing (e.g. the lens shading correction map, and radial distortion fields) treats the top, left of this rectangle as the origin, (0,0).

The size of this region determines the maximum field of view and the maximum number of pixels that an image from this sensor can contain, prior to the application of geometric distortion correction. The effective maximum pixel dimensions of a post-distortion-corrected image is given by the ACAMERA_SENSOR_INFO_ACTIVE_ARRAY_SIZE field, and the effective maximum field of view for a post-distortion-corrected image can be calculated by applying the geometric distortion correction fields to this rectangle, and cropping to the rectangle given in ACAMERA_SENSOR_INFO_ACTIVE_ARRAY_SIZE.

E.g. to calculate position of a pixel, (x,y), in a processed YUV output image with the dimensions in ACAMERA_SENSOR_INFO_ACTIVE_ARRAY_SIZE given the position of a pixel, (x', y'), in the raw pixel array with dimensions give in ACAMERA_SENSOR_INFO_PIXEL_ARRAY_SIZE:

  1. Choose a pixel (x', y') within the active array region of the raw buffer given in ACAMERA_SENSOR_INFO_PRE_CORRECTION_ACTIVE_ARRAY_SIZE, otherwise this pixel is considered to be outside of the FOV, and will not be shown in the processed output image.
  2. Apply geometric distortion correction to get the post-distortion pixel coordinate, (x_i, y_i). When applying geometric correction metadata, note that metadata for raw buffers is defined relative to the top, left of the ACAMERA_SENSOR_INFO_PRE_CORRECTION_ACTIVE_ARRAY_SIZE rectangle.
  3. If the resulting corrected pixel coordinate is within the region given in ACAMERA_SENSOR_INFO_ACTIVE_ARRAY_SIZE, then the position of this pixel in the processed output image buffer is (x_i - activeArray.left, y_i - activeArray.top), when the top, left coordinate of that buffer is treated as (0, 0).

Thus, for pixel x',y' = (25, 25) on a sensor where ACAMERA_SENSOR_INFO_PIXEL_ARRAY_SIZE is (100,100), ACAMERA_SENSOR_INFO_PRE_CORRECTION_ACTIVE_ARRAY_SIZE is (10, 10, 100, 100), ACAMERA_SENSOR_INFO_ACTIVE_ARRAY_SIZE is (20, 20, 80, 80), and the geometric distortion correction doesn't change the pixel coordinate, the resulting pixel selected in pixel coordinates would be x,y = (25, 25) relative to the top,left of the raw buffer with dimensions given in ACAMERA_SENSOR_INFO_PIXEL_ARRAY_SIZE, and would be (5, 5) relative to the top,left of post-processed YUV output buffer with dimensions given in ACAMERA_SENSOR_INFO_ACTIVE_ARRAY_SIZE.

The currently supported fields that correct for geometric distortion are:

  1. ACAMERA_LENS_DISTORTION.

If all of the geometric distortion fields are no-ops, this rectangle will be the same as the post-distortion-corrected rectangle given in ACAMERA_SENSOR_INFO_ACTIVE_ARRAY_SIZE.

This rectangle is defined relative to the full pixel array; (0,0) is the top-left of the full pixel array, and the size of the full pixel array is given by ACAMERA_SENSOR_INFO_PIXEL_ARRAY_SIZE.

The pre-correction active array may be smaller than the full pixel array, since the full array may include black calibration pixels or other inactive regions.

The data representation is int[4], which maps to (left, top, width, height).

See also: ACAMERA_LENS_DISTORTION See also: ACAMERA_SENSOR_INFO_ACTIVE_ARRAY_SIZE See also: ACAMERA_SENSOR_INFO_PIXEL_ARRAY_SIZE See also: ACAMERA_SENSOR_INFO_PRE_CORRECTION_ACTIVE_ARRAY_SIZE

ACAMERA_SENSOR_INFO_SENSITIVITY_RANGE

Range of sensitivities for ACAMERA_SENSOR_SENSITIVITY supported by this camera device.

See also: ACAMERA_SENSOR_SENSITIVITY

Type: int32[2]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

The values are the standard ISO sensitivity values, as defined in ISO 12232:2006.

ACAMERA_SENSOR_INFO_TIMESTAMP_SOURCE

The time base source for sensor capture start timestamps.

Type: byte (acamera_metadata_enum_android_sensor_info_timestamp_source_t)

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

The timestamps provided for captures are always in nanoseconds and monotonic, but may not based on a time source that can be compared to other system time sources.

This characteristic defines the source for the timestamps, and therefore whether they can be compared against other system time sources/timestamps.

ACAMERA_SENSOR_INFO_WHITE_LEVEL

Maximum raw value output by sensor.

Type: int32

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

This specifies the fully-saturated encoding level for the raw sample values from the sensor. This is typically caused by the sensor becoming highly non-linear or clipping. The minimum for each channel is specified by the offset in the ACAMERA_SENSOR_BLACK_LEVEL_PATTERN key.

The white level is typically determined either by sensor bit depth (8-14 bits is expected), or by the point where the sensor response becomes too non-linear to be useful. The default value for this is maximum representable value for a 16-bit raw sample (2^16 - 1).

The white level values of captured images may vary for different capture settings (e.g., ACAMERA_SENSOR_SENSITIVITY). This key represents a coarse approximation for such case. It is recommended to use ACAMERA_SENSOR_DYNAMIC_WHITE_LEVEL for captures when supported by the camera device, which provides more accurate white level values.

See also: ACAMERA_SENSOR_BLACK_LEVEL_PATTERN See also: ACAMERA_SENSOR_DYNAMIC_WHITE_LEVEL See also: ACAMERA_SENSOR_SENSITIVITY

ACAMERA_SENSOR_MAX_ANALOG_SENSITIVITY

Maximum sensitivity that is implemented purely through analog gain.

Type: int32

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

For ACAMERA_SENSOR_SENSITIVITY values less than or equal to this, all applied gain must be analog. For values above this, the gain applied can be a mix of analog and digital.

See also: ACAMERA_SENSOR_SENSITIVITY

ACAMERA_SENSOR_NEUTRAL_COLOR_POINT

The estimated camera neutral color in the native sensor colorspace at the time of capture.

Type: rational[3]

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks

This value gives the neutral color point encoded as an RGB value in the native sensor color space. The neutral color point indicates the currently estimated white point of the scene illumination. It can be used to interpolate between the provided color transforms when processing raw sensor data.

The order of the values is R, G, B; where R is in the lowest index.

ACAMERA_SENSOR_NOISE_PROFILE

Noise model coefficients for each CFA mosaic channel.

Type: double[2*CFA Channels]

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks

This key contains two noise model coefficients for each CFA channel corresponding to the sensor amplification (S) and sensor readout noise (O). These are given as pairs of coefficients for each channel in the same order as channels listed for the CFA layout key (see ACAMERA_SENSOR_INFO_COLOR_FILTER_ARRANGEMENT). This is represented as an array of Pair, where the first member of the Pair at index n is the S coefficient and the second member is the O coefficient for the nth color channel in the CFA.

These coefficients are used in a two parameter noise model to describe the amount of noise present in the image for each CFA channel. The noise model used here is:

N(x) = sqrt(Sx + O)

Where x represents the recorded signal of a CFA channel normalized to the range [0, 1], and S and O are the noise model coeffiecients for that channel.

A more detailed description of the noise model can be found in the Adobe DNG specification for the NoiseProfile tag.

See also: ACAMERA_SENSOR_INFO_COLOR_FILTER_ARRANGEMENT

ACAMERA_SENSOR_OPTICAL_BLACK_REGIONS

List of disjoint rectangles indicating the sensor optically shielded black pixel regions.

Type: int32[4*num_regions]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

In most camera sensors, the active array is surrounded by some optically shielded pixel areas. By blocking light, these pixels provides a reliable black reference for black level compensation in active array region.

This key provides a list of disjoint rectangles specifying the regions of optically shielded (with metal shield) black pixel regions if the camera device is capable of reading out these black pixels in the output raw images. In comparison to the fixed black level values reported by ACAMERA_SENSOR_BLACK_LEVEL_PATTERN, this key may provide a more accurate way for the application to calculate black level of each captured raw images.

When this key is reported, the ACAMERA_SENSOR_DYNAMIC_BLACK_LEVEL and ACAMERA_SENSOR_DYNAMIC_WHITE_LEVEL will also be reported.

The data representation is int[4], which maps to (left, top, width, height).

See also: ACAMERA_SENSOR_BLACK_LEVEL_PATTERN See also: ACAMERA_SENSOR_DYNAMIC_BLACK_LEVEL See also: ACAMERA_SENSOR_DYNAMIC_WHITE_LEVEL

ACAMERA_SENSOR_ORIENTATION

Clockwise angle through which the output image needs to be rotated to be upright on the device screen in its native orientation.

Type: int32

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

Also defines the direction of rolling shutter readout, which is from top to bottom in the sensor's coordinate system.

ACAMERA_SENSOR_REFERENCE_ILLUMINANT1

The standard reference illuminant used as the scene light source when calculating the ACAMERA_SENSOR_COLOR_TRANSFORM1, ACAMERA_SENSOR_CALIBRATION_TRANSFORM1, and ACAMERA_SENSOR_FORWARD_MATRIX1 matrices.

See also: ACAMERA_SENSOR_CALIBRATION_TRANSFORM1 See also: ACAMERA_SENSOR_COLOR_TRANSFORM1 See also: ACAMERA_SENSOR_FORWARD_MATRIX1

Type: byte (acamera_metadata_enum_android_sensor_reference_illuminant1_t)

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

The values in this key correspond to the values defined for the EXIF LightSource tag. These illuminants are standard light sources that are often used calibrating camera devices.

If this key is present, then ACAMERA_SENSOR_COLOR_TRANSFORM1, ACAMERA_SENSOR_CALIBRATION_TRANSFORM1, and ACAMERA_SENSOR_FORWARD_MATRIX1 will also be present.

Some devices may choose to provide a second set of calibration information for improved quality, including ACAMERA_SENSOR_REFERENCE_ILLUMINANT2 and its corresponding matrices.

See also: ACAMERA_SENSOR_CALIBRATION_TRANSFORM1 See also: ACAMERA_SENSOR_COLOR_TRANSFORM1 See also: ACAMERA_SENSOR_FORWARD_MATRIX1 See also: ACAMERA_SENSOR_REFERENCE_ILLUMINANT2

ACAMERA_SENSOR_REFERENCE_ILLUMINANT2

The standard reference illuminant used as the scene light source when calculating the ACAMERA_SENSOR_COLOR_TRANSFORM2, ACAMERA_SENSOR_CALIBRATION_TRANSFORM2, and ACAMERA_SENSOR_FORWARD_MATRIX2 matrices.

See also: ACAMERA_SENSOR_CALIBRATION_TRANSFORM2 See also: ACAMERA_SENSOR_COLOR_TRANSFORM2 See also: ACAMERA_SENSOR_FORWARD_MATRIX2

Type: byte

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

See ACAMERA_SENSOR_REFERENCE_ILLUMINANT1 for more details.

If this key is present, then ACAMERA_SENSOR_COLOR_TRANSFORM2, ACAMERA_SENSOR_CALIBRATION_TRANSFORM2, and ACAMERA_SENSOR_FORWARD_MATRIX2 will also be present.

See also: ACAMERA_SENSOR_CALIBRATION_TRANSFORM2 See also: ACAMERA_SENSOR_COLOR_TRANSFORM2 See also: ACAMERA_SENSOR_FORWARD_MATRIX2 See also: ACAMERA_SENSOR_REFERENCE_ILLUMINANT1

ACAMERA_SENSOR_ROLLING_SHUTTER_SKEW

Duration between the start of first row exposure and the start of last row exposure.

Type: int64

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks

This is the exposure time skew between the first and last row exposure start times. The first row and the last row are the first and last rows inside of the ACAMERA_SENSOR_INFO_ACTIVE_ARRAY_SIZE.

For typical camera sensors that use rolling shutters, this is also equivalent to the frame readout time.

See also: ACAMERA_SENSOR_INFO_ACTIVE_ARRAY_SIZE

ACAMERA_SENSOR_SENSITIVITY

The amount of gain applied to sensor data before processing.

Type: int32

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

The sensitivity is the standard ISO sensitivity value, as defined in ISO 12232:2006.

The sensitivity must be within ACAMERA_SENSOR_INFO_SENSITIVITY_RANGE, and if if it less than ACAMERA_SENSOR_MAX_ANALOG_SENSITIVITY, the camera device is guaranteed to use only analog amplification for applying the gain.

If the camera device cannot apply the exact sensitivity requested, it will reduce the gain to the nearest supported value. The final sensitivity used will be available in the output capture result.

This control is only effective if ACAMERA_CONTROL_AE_MODE or ACAMERA_CONTROL_MODE is set to OFF; otherwise the auto-exposure algorithm will override this value.

See also: ACAMERA_CONTROL_AE_MODE See also: ACAMERA_CONTROL_MODE See also: ACAMERA_SENSOR_INFO_SENSITIVITY_RANGE See also: ACAMERA_SENSOR_MAX_ANALOG_SENSITIVITY

ACAMERA_SENSOR_TEST_PATTERN_DATA

A pixel [R, G_even, G_odd, B] that supplies the test pattern when ACAMERA_SENSOR_TEST_PATTERN_MODE is SOLID_COLOR.

See also: ACAMERA_SENSOR_TEST_PATTERN_MODE

Type: int32[4]

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

Each color channel is treated as an unsigned 32-bit integer. The camera device then uses the most significant X bits that correspond to how many bits are in its Bayer raw sensor output.

For example, a sensor with RAW10 Bayer output would use the 10 most significant bits from each color channel.

ACAMERA_SENSOR_TEST_PATTERN_MODE

When enabled, the sensor sends a test pattern instead of doing a real exposure from the camera.

Type: int32 (acamera_metadata_enum_android_sensor_test_pattern_mode_t)

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

When a test pattern is enabled, all manual sensor controls specified by ACAMERA_SENSOR_* will be ignored. All other controls should work as normal.

For example, if manual flash is enabled, flash firing should still occur (and that the test pattern remain unmodified, since the flash would not actually affect it).

Defaults to OFF.

ACAMERA_SENSOR_TIMESTAMP

Time at start of exposure of first row of the image sensor active array, in nanoseconds.

Type: int64

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks

The timestamps are also included in all image buffers produced for the same capture, and will be identical on all the outputs.

When ACAMERA_SENSOR_INFO_TIMESTAMP_SOURCE == UNKNOWN, the timestamps measure time since an unspecified starting point, and are monotonically increasing. They can be compared with the timestamps for other captures from the same camera device, but are not guaranteed to be comparable to any other time source.

When ACAMERA_SENSOR_INFO_TIMESTAMP_SOURCE == REALTIME, the timestamps measure time in the same timebase as SystemClock::elapsedRealtimeNanos, and they can be compared to other timestamps from other subsystems that are using that base.

For reprocessing, the timestamp will match the start of exposure of the input image, i.e. the timestamp in the TotalCaptureResult that was used to create the reprocess capture request.

See also: ACAMERA_SENSOR_INFO_TIMESTAMP_SOURCE

ACAMERA_SHADING_AVAILABLE_MODES

List of lens shading modes for ACAMERA_SHADING_MODE that are supported by this camera device.

See also: ACAMERA_SHADING_MODE

Type: byte[n]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

This list contains lens shading modes that can be set for the camera device. Camera devices that support the MANUAL_POST_PROCESSING capability will always list OFF and FAST mode. This includes all FULL level devices. LEGACY devices will always only support FAST mode.

ACAMERA_SHADING_END
ACAMERA_SHADING_MODE

Quality of lens shading correction applied to the image data.

Type: byte (acamera_metadata_enum_android_shading_mode_t)

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

When set to OFF mode, no lens shading correction will be applied by the camera device, and an identity lens shading map data will be provided if ACAMERA_STATISTICS_LENS_SHADING_MAP_MODE == ON. For example, for lens shading map with size of [ 4, 3 ], the output android.statistics.lensShadingCorrectionMap for this case will be an identity map shown below:

[ 1.0, 1.0, 1.0, 1.0,  1.0, 1.0, 1.0, 1.0,
 1.0, 1.0, 1.0, 1.0,  1.0, 1.0, 1.0, 1.0,
 1.0, 1.0, 1.0, 1.0,  1.0, 1.0, 1.0, 1.0,
 1.0, 1.0, 1.0, 1.0,  1.0, 1.0, 1.0, 1.0,
 1.0, 1.0, 1.0, 1.0,  1.0, 1.0, 1.0, 1.0,
 1.0, 1.0, 1.0, 1.0,  1.0, 1.0, 1.0, 1.0 ]

When set to other modes, lens shading correction will be applied by the camera device. Applications can request lens shading map data by setting ACAMERA_STATISTICS_LENS_SHADING_MAP_MODE to ON, and then the camera device will provide lens shading map data in android.statistics.lensShadingCorrectionMap; the returned shading map data will be the one applied by the camera device for this capture request.

The shading map data may depend on the auto-exposure (AE) and AWB statistics, therefore the reliability of the map data may be affected by the AE and AWB algorithms. When AE and AWB are in AUTO modes(ACAMERA_CONTROL_AE_MODE != OFF and ACAMERA_CONTROL_AWB_MODE != OFF), to get best results, it is recommended that the applications wait for the AE and AWB to be converged before using the returned shading map data.

See also: ACAMERA_CONTROL_AE_MODE See also: ACAMERA_CONTROL_AWB_MODE See also: ACAMERA_STATISTICS_LENS_SHADING_MAP_MODE

ACAMERA_STATISTICS_END
ACAMERA_STATISTICS_FACE_DETECT_MODE

Operating mode for the face detector unit.

Type: byte (acamera_metadata_enum_android_statistics_face_detect_mode_t)

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

Whether face detection is enabled, and whether it should output just the basic fields or the full set of fields.

ACAMERA_STATISTICS_FACE_IDS

List of unique IDs for detected faces.

Type: int32[n]

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks

Each detected face is given a unique ID that is valid for as long as the face is visible to the camera device. A face that leaves the field of view and later returns may be assigned a new ID.

Only available if ACAMERA_STATISTICS_FACE_DETECT_MODE == FULL

See also: ACAMERA_STATISTICS_FACE_DETECT_MODE

ACAMERA_STATISTICS_FACE_LANDMARKS

List of landmarks for detected faces.

Type: int32[n*6]

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks

The coordinate system is that of ACAMERA_SENSOR_INFO_ACTIVE_ARRAY_SIZE, with (0, 0) being the top-left pixel of the active array.

Only available if ACAMERA_STATISTICS_FACE_DETECT_MODE == FULL

See also: ACAMERA_SENSOR_INFO_ACTIVE_ARRAY_SIZE See also: ACAMERA_STATISTICS_FACE_DETECT_MODE

ACAMERA_STATISTICS_FACE_RECTANGLES

List of the bounding rectangles for detected faces.

Type: int32[n*4]

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks

The coordinate system is that of ACAMERA_SENSOR_INFO_ACTIVE_ARRAY_SIZE, with (0, 0) being the top-left pixel of the active array.

Only available if ACAMERA_STATISTICS_FACE_DETECT_MODE != OFF The data representation is int[4], which maps to (left, top, width, height).

See also: ACAMERA_SENSOR_INFO_ACTIVE_ARRAY_SIZE See also: ACAMERA_STATISTICS_FACE_DETECT_MODE

ACAMERA_STATISTICS_FACE_SCORES

List of the face confidence scores for detected faces

Type: byte[n]

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks

Only available if ACAMERA_STATISTICS_FACE_DETECT_MODE != OFF.

See also: ACAMERA_STATISTICS_FACE_DETECT_MODE

ACAMERA_STATISTICS_HOT_PIXEL_MAP

List of (x, y) coordinates of hot/defective pixels on the sensor.

Type: int32[2*n]

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks

A coordinate (x, y) must lie between (0, 0), and (width - 1, height - 1) (inclusive), which are the top-left and bottom-right of the pixel array, respectively. The width and height dimensions are given in ACAMERA_SENSOR_INFO_PIXEL_ARRAY_SIZE. This may include hot pixels that lie outside of the active array bounds given by ACAMERA_SENSOR_INFO_ACTIVE_ARRAY_SIZE.

See also: ACAMERA_SENSOR_INFO_ACTIVE_ARRAY_SIZE See also: ACAMERA_SENSOR_INFO_PIXEL_ARRAY_SIZE

ACAMERA_STATISTICS_HOT_PIXEL_MAP_MODE

Operating mode for hot pixel map generation.

Type: byte (acamera_metadata_enum_android_statistics_hot_pixel_map_mode_t)

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

If set to true, a hot pixel map is returned in ACAMERA_STATISTICS_HOT_PIXEL_MAP. If set to false, no hot pixel map will be returned.

See also: ACAMERA_STATISTICS_HOT_PIXEL_MAP

ACAMERA_STATISTICS_INFO_AVAILABLE_FACE_DETECT_MODES

List of face detection modes for ACAMERA_STATISTICS_FACE_DETECT_MODE that are supported by this camera device.

See also: ACAMERA_STATISTICS_FACE_DETECT_MODE

Type: byte[n]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

OFF is always supported.

ACAMERA_STATISTICS_INFO_AVAILABLE_HOT_PIXEL_MAP_MODES

List of hot pixel map output modes for ACAMERA_STATISTICS_HOT_PIXEL_MAP_MODE that are supported by this camera device.

See also: ACAMERA_STATISTICS_HOT_PIXEL_MAP_MODE

Type: byte[n]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

If no hotpixel map output is available for this camera device, this will contain only false.

ON is always supported on devices with the RAW capability.

ACAMERA_STATISTICS_INFO_AVAILABLE_LENS_SHADING_MAP_MODES

List of lens shading map output modes for ACAMERA_STATISTICS_LENS_SHADING_MAP_MODE that are supported by this camera device.

See also: ACAMERA_STATISTICS_LENS_SHADING_MAP_MODE

Type: byte[n]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

If no lens shading map output is available for this camera device, this key will contain only OFF.

ON is always supported on devices with the RAW capability. LEGACY mode devices will always only support OFF.

ACAMERA_STATISTICS_INFO_AVAILABLE_OIS_DATA_MODES

List of OIS data output modes for ACAMERA_STATISTICS_OIS_DATA_MODE that are supported by this camera device.

See also: ACAMERA_STATISTICS_OIS_DATA_MODE

Type: byte[n]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

If no OIS data output is available for this camera device, this key will contain only OFF.

ACAMERA_STATISTICS_INFO_END
ACAMERA_STATISTICS_INFO_MAX_FACE_COUNT

The maximum number of simultaneously detectable faces.

Type: int32

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

ACAMERA_STATISTICS_LENS_SHADING_MAP

The shading map is a low-resolution floating-point map that lists the coefficients used to correct for vignetting and color shading, for each Bayer color channel of RAW image data.

Type: float[4*n*m]

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks

The map provided here is the same map that is used by the camera device to correct both color shading and vignetting for output non-RAW images.

When there is no lens shading correction applied to RAW output images (ACAMERA_SENSOR_INFO_LENS_SHADING_APPLIED == false), this map is the complete lens shading correction map; when there is some lens shading correction applied to the RAW output image (ACAMERA_SENSOR_INFO_LENS_SHADING_APPLIED== true), this map reports the remaining lens shading correction map that needs to be applied to get shading corrected images that match the camera device's output for non-RAW formats.

For a complete shading correction map, the least shaded section of the image will have a gain factor of 1; all other sections will have gains above 1.

When ACAMERA_COLOR_CORRECTION_MODE = TRANSFORM_MATRIX, the map will take into account the colorCorrection settings.

The shading map is for the entire active pixel array, and is not affected by the crop region specified in the request. Each shading map entry is the value of the shading compensation map over a specific pixel on the sensor. Specifically, with a (N x M) resolution shading map, and an active pixel array size (W x H), shading map entry (x,y) ϵ (0 ... N-1, 0 ... M-1) is the value of the shading map at pixel ( ((W-1)/(N-1)) * x, ((H-1)/(M-1)) * y) for the four color channels. The map is assumed to be bilinearly interpolated between the sample points.

The channel order is [R, Geven, Godd, B], where Geven is the green channel for the even rows of a Bayer pattern, and Godd is the odd rows. The shading map is stored in a fully interleaved format, and its size is provided in the camera static metadata by ACAMERA_LENS_INFO_SHADING_MAP_SIZE.

The shading map will generally have on the order of 30-40 rows and columns, and will be smaller than 64x64.

As an example, given a very small map defined as:

ACAMERA_LENS_INFO_SHADING_MAP_SIZE = [ 4, 3 ]
ACAMERA_STATISTICS_LENS_SHADING_MAP =
[ 1.3, 1.2, 1.15, 1.2,  1.2, 1.2, 1.15, 1.2,
    1.1, 1.2, 1.2, 1.2,  1.3, 1.2, 1.3, 1.3,
  1.2, 1.2, 1.25, 1.1,  1.1, 1.1, 1.1, 1.0,
    1.0, 1.0, 1.0, 1.0,  1.2, 1.3, 1.25, 1.2,
  1.3, 1.2, 1.2, 1.3,   1.2, 1.15, 1.1, 1.2,
    1.2, 1.1, 1.0, 1.2,  1.3, 1.15, 1.2, 1.3 ]

The low-resolution scaling map images for each channel are (displayed using nearest-neighbor interpolation):

As a visualization only, inverting the full-color map to recover an image of a gray wall (using bicubic interpolation for visual quality) as captured by the sensor gives:

Note that the RAW image data might be subject to lens shading correction not reported on this map. Query ACAMERA_SENSOR_INFO_LENS_SHADING_APPLIED to see if RAW image data has subject to lens shading correction. If ACAMERA_SENSOR_INFO_LENS_SHADING_APPLIED is TRUE, the RAW image data is subject to partial or full lens shading correction. In the case full lens shading correction is applied to RAW images, the gain factor map reported in this key will contain all 1.0 gains. In other words, the map reported in this key is the remaining lens shading that needs to be applied on the RAW image to get images without lens shading artifacts. See android.request.maxNumOutputRaw for a list of RAW image formats.

See also: ACAMERA_COLOR_CORRECTION_MODE See also: ACAMERA_LENS_INFO_SHADING_MAP_SIZE See also: ACAMERA_SENSOR_INFO_LENS_SHADING_APPLIED See also: ACAMERA_STATISTICS_LENS_SHADING_MAP

ACAMERA_STATISTICS_LENS_SHADING_MAP_MODE

Whether the camera device will output the lens shading map in output result metadata.

Type: byte (acamera_metadata_enum_android_statistics_lens_shading_map_mode_t)

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

When set to ON, ACAMERA_STATISTICS_LENS_SHADING_MAP will be provided in the output result metadata.

ON is always supported on devices with the RAW capability.

See also: ACAMERA_STATISTICS_LENS_SHADING_MAP

ACAMERA_STATISTICS_OIS_DATA_MODE

A control for selecting whether OIS position information is included in output result metadata.

Type: byte (acamera_metadata_enum_android_statistics_ois_data_mode_t)

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

ACAMERA_STATISTICS_OIS_TIMESTAMPS

An array of timestamps of OIS samples, in nanoseconds.

Type: int64[n]

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks

The array contains the timestamps of OIS samples. The timestamps are in the same timebase as and comparable to ACAMERA_SENSOR_TIMESTAMP.

See also: ACAMERA_SENSOR_TIMESTAMP

ACAMERA_STATISTICS_OIS_X_SHIFTS

An array of shifts of OIS samples, in x direction.

Type: float[n]

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks

The array contains the amount of shifts in x direction, in pixels, based on OIS samples. A positive value is a shift from left to right in active array coordinate system. For example, if the optical center is (1000, 500) in active array coordinates, a shift of (3, 0) puts the new optical center at (1003, 500).

The number of shifts must match the number of timestamps in ACAMERA_STATISTICS_OIS_TIMESTAMPS.

See also: ACAMERA_STATISTICS_OIS_TIMESTAMPS

ACAMERA_STATISTICS_OIS_Y_SHIFTS

An array of shifts of OIS samples, in y direction.

Type: float[n]

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks

The array contains the amount of shifts in y direction, in pixels, based on OIS samples. A positive value is a shift from top to bottom in active array coordinate system. For example, if the optical center is (1000, 500) in active array coordinates, a shift of (0, 5) puts the new optical center at (1000, 505).

The number of shifts must match the number of timestamps in ACAMERA_STATISTICS_OIS_TIMESTAMPS.

See also: ACAMERA_STATISTICS_OIS_TIMESTAMPS

ACAMERA_STATISTICS_SCENE_FLICKER

The camera device estimated scene illumination lighting frequency.

Type: byte (acamera_metadata_enum_android_statistics_scene_flicker_t)

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks

Many light sources, such as most fluorescent lights, flicker at a rate that depends on the local utility power standards. This flicker must be accounted for by auto-exposure routines to avoid artifacts in captured images. The camera device uses this entry to tell the application what the scene illuminant frequency is.

When manual exposure control is enabled (ACAMERA_CONTROL_AE_MODE == OFF or ACAMERA_CONTROL_MODE == OFF), the ACAMERA_CONTROL_AE_ANTIBANDING_MODE doesn't perform antibanding, and the application can ensure it selects exposure times that do not cause banding issues by looking into this metadata field. See ACAMERA_CONTROL_AE_ANTIBANDING_MODE for more details.

Reports NONE if there doesn't appear to be flickering illumination.

See also: ACAMERA_CONTROL_AE_ANTIBANDING_MODE See also: ACAMERA_CONTROL_AE_MODE See also: ACAMERA_CONTROL_MODE

ACAMERA_SYNC_END
ACAMERA_SYNC_FRAME_NUMBER

The frame number corresponding to the last request with which the output result (metadata + buffers) has been fully synchronized.

Type: int64 (acamera_metadata_enum_android_sync_frame_number_t)

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks

When a request is submitted to the camera device, there is usually a delay of several frames before the controls get applied. A camera device may either choose to account for this delay by implementing a pipeline and carefully submit well-timed atomic control updates, or it may start streaming control changes that span over several frame boundaries.

In the latter case, whenever a request's settings change relative to the previous submitted request, the full set of changes may take multiple frame durations to fully take effect. Some settings may take effect sooner (in less frame durations) than others.

While a set of control changes are being propagated, this value will be CONVERGING.

Once it is fully known that a set of control changes have been finished propagating, and the resulting updated control settings have been read back by the camera device, this value will be set to a non-negative frame number (corresponding to the request to which the results have synchronized to).

Older camera device implementations may not have a way to detect when all camera controls have been applied, and will always set this value to UNKNOWN.

FULL capability devices will always have this value set to the frame number of the request corresponding to this result.

Further details:

  • Whenever a request differs from the last request, any future results not yet returned may have this value set to CONVERGING (this could include any in-progress captures not yet returned by the camera device, for more details see pipeline considerations below).
  • Submitting a series of multiple requests that differ from the previous request (e.g. r1, r2, r3 s.t. r1 != r2 != r3) moves the new synchronization frame to the last non-repeating request (using the smallest frame number from the contiguous list of repeating requests).
  • Submitting the same request repeatedly will not change this value to CONVERGING, if it was already a non-negative value.
  • When this value changes to non-negative, that means that all of the metadata controls from the request have been applied, all of the metadata controls from the camera device have been read to the updated values (into the result), and all of the graphics buffers corresponding to this result are also synchronized to the request.

Pipeline considerations:

Submitting a request with updated controls relative to the previously submitted requests may also invalidate the synchronization state of all the results corresponding to currently in-flight requests.

In other words, results for this current request and up to ACAMERA_REQUEST_PIPELINE_MAX_DEPTH prior requests may have their ACAMERA_SYNC_FRAME_NUMBER change to CONVERGING.

See also: ACAMERA_REQUEST_PIPELINE_MAX_DEPTH See also: ACAMERA_SYNC_FRAME_NUMBER

ACAMERA_SYNC_MAX_LATENCY

The maximum number of frames that can occur after a request (different than the previous) has been submitted, and before the result's state becomes synchronized.

Type: int32 (acamera_metadata_enum_android_sync_max_latency_t)

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

This defines the maximum distance (in number of metadata results), between the frame number of the request that has new controls to apply and the frame number of the result that has all the controls applied.

In other words this acts as an upper boundary for how many frames must occur before the camera device knows for a fact that the new submitted camera settings have been applied in outgoing frames.

ACAMERA_TONEMAP_AVAILABLE_TONE_MAP_MODES

List of tonemapping modes for ACAMERA_TONEMAP_MODE that are supported by this camera device.

See also: ACAMERA_TONEMAP_MODE

Type: byte[n]

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

Camera devices that support the MANUAL_POST_PROCESSING capability will always contain at least one of below mode combinations:

  • CONTRAST_CURVE, FAST and HIGH_QUALITY
  • GAMMA_VALUE, PRESET_CURVE, FAST and HIGH_QUALITY

This includes all FULL level devices.

ACAMERA_TONEMAP_CURVE_BLUE

Tonemapping / contrast / gamma curve for the blue channel, to use when ACAMERA_TONEMAP_MODE is CONTRAST_CURVE.

See also: ACAMERA_TONEMAP_MODE

Type: float[n*2]

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

See ACAMERA_TONEMAP_CURVE_RED for more details.

See also: ACAMERA_TONEMAP_CURVE_RED

ACAMERA_TONEMAP_CURVE_GREEN

Tonemapping / contrast / gamma curve for the green channel, to use when ACAMERA_TONEMAP_MODE is CONTRAST_CURVE.

See also: ACAMERA_TONEMAP_MODE

Type: float[n*2]

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

See ACAMERA_TONEMAP_CURVE_RED for more details.

See also: ACAMERA_TONEMAP_CURVE_RED

ACAMERA_TONEMAP_CURVE_RED

Tonemapping / contrast / gamma curve for the red channel, to use when ACAMERA_TONEMAP_MODE is CONTRAST_CURVE.

See also: ACAMERA_TONEMAP_MODE

Type: float[n*2]

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

Each channel's curve is defined by an array of control points:

ACAMERA_TONEMAP_CURVE_RED =
  [ P0in, P0out, P1in, P1out, P2in, P2out, P3in, P3out, ..., PNin, PNout ]
2 <= N <= ACAMERA_TONEMAP_MAX_CURVE_POINTS

These are sorted in order of increasing Pin; it is required that input values 0.0 and 1.0 are included in the list to define a complete mapping. For input values between control points, the camera device must linearly interpolate between the control points.

Each curve can have an independent number of points, and the number of points can be less than max (that is, the request doesn't have to always provide a curve with number of points equivalent to ACAMERA_TONEMAP_MAX_CURVE_POINTS).

For devices with MONOCHROME capability, only red channel is used. Green and blue channels are ignored.

A few examples, and their corresponding graphical mappings; these only specify the red channel and the precision is limited to 4 digits, for conciseness.

Linear mapping:

ACAMERA_TONEMAP_CURVE_RED = [ 0, 0, 1.0, 1.0 ]

Invert mapping:

ACAMERA_TONEMAP_CURVE_RED = [ 0, 1.0, 1.0, 0 ]

Gamma 1/2.2 mapping, with 16 control points:

ACAMERA_TONEMAP_CURVE_RED = [
  0.0000, 0.0000, 0.0667, 0.2920, 0.1333, 0.4002, 0.2000, 0.4812,
  0.2667, 0.5484, 0.3333, 0.6069, 0.4000, 0.6594, 0.4667, 0.7072,
  0.5333, 0.7515, 0.6000, 0.7928, 0.6667, 0.8317, 0.7333, 0.8685,
  0.8000, 0.9035, 0.8667, 0.9370, 0.9333, 0.9691, 1.0000, 1.0000 ]

Standard sRGB gamma mapping, per IEC 61966-2-1:1999, with 16 control points:

ACAMERA_TONEMAP_CURVE_RED = [
  0.0000, 0.0000, 0.0667, 0.2864, 0.1333, 0.4007, 0.2000, 0.4845,
  0.2667, 0.5532, 0.3333, 0.6125, 0.4000, 0.6652, 0.4667, 0.7130,
  0.5333, 0.7569, 0.6000, 0.7977, 0.6667, 0.8360, 0.7333, 0.8721,
  0.8000, 0.9063, 0.8667, 0.9389, 0.9333, 0.9701, 1.0000, 1.0000 ]

See also: ACAMERA_TONEMAP_CURVE_RED See also: ACAMERA_TONEMAP_MAX_CURVE_POINTS

ACAMERA_TONEMAP_END
ACAMERA_TONEMAP_GAMMA

Tonemapping curve to use when ACAMERA_TONEMAP_MODE is GAMMA_VALUE

See also: ACAMERA_TONEMAP_MODE

Type: float

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

The tonemap curve will be defined the following formula:

  • OUT = pow(IN, 1.0 / gamma) where IN and OUT is the input pixel value scaled to range [0.0, 1.0], pow is the power function and gamma is the gamma value specified by this key.

The same curve will be applied to all color channels. The camera device may clip the input gamma value to its supported range. The actual applied value will be returned in capture result.

The valid range of gamma value varies on different devices, but values within [1.0, 5.0] are guaranteed not to be clipped.

ACAMERA_TONEMAP_MAX_CURVE_POINTS

Maximum number of supported points in the tonemap curve that can be used for android.tonemap.curve.

Type: int32

This tag may appear in:

  • ACameraMetadata from ACameraManager_getCameraCharacteristics

If the actual number of points provided by the application (in ACAMERA_TONEMAPCURVE_*) is less than this maximum, the camera device will resample the curve to its internal representation, using linear interpolation.

The output curves in the result metadata may have a different number of points than the input curves, and will represent the actual hardware curves used as closely as possible when linearly interpolated.

ACAMERA_TONEMAP_MODE

High-level global contrast/gamma/tonemapping control.

Type: byte (acamera_metadata_enum_android_tonemap_mode_t)

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

When switching to an application-defined contrast curve by setting ACAMERA_TONEMAP_MODE to CONTRAST_CURVE, the curve is defined per-channel with a set of (in, out) points that specify the mapping from input high-bit-depth pixel value to the output low-bit-depth value. Since the actual pixel ranges of both input and output may change depending on the camera pipeline, the values are specified by normalized floating-point numbers.

More-complex color mapping operations such as 3D color look-up tables, selective chroma enhancement, or other non-linear color transforms will be disabled when ACAMERA_TONEMAP_MODE is CONTRAST_CURVE.

When using either FAST or HIGH_QUALITY, the camera device will emit its own tonemap curve in android.tonemap.curve. These values are always available, and as close as possible to the actually used nonlinear/nonglobal transforms.

If a request is sent with CONTRAST_CURVE with the camera device's provided curve in FAST or HIGH_QUALITY, the image's tonemap will be roughly the same.

See also: ACAMERA_TONEMAP_MODE

ACAMERA_TONEMAP_PRESET_CURVE

Tonemapping curve to use when ACAMERA_TONEMAP_MODE is PRESET_CURVE

See also: ACAMERA_TONEMAP_MODE

Type: byte (acamera_metadata_enum_android_tonemap_preset_curve_t)

This tag may appear in:

  • ACameraMetadata from ACameraCaptureSession_captureCallback_result callbacks
  • ACaptureRequest

The tonemap curve will be defined by specified standard.

sRGB (approximated by 16 control points):

Rec. 709 (approximated by 16 control points):

Note that above figures show a 16 control points approximation of preset curves. Camera devices may apply a different approximation to the curve.

camera_status_t

 camera_status_t
Properties
ACAMERA_ERROR_BASE
ACAMERA_ERROR_CAMERA_DEVICE

Camera operation has failed and the camera device has encountered a fatal error and needs to be re-opened before it can be used again.

ACAMERA_ERROR_CAMERA_DISABLED

The camera is disabled due to a device policy, and cannot be opened.

ACAMERA_ERROR_CAMERA_DISCONNECTED

Camera operation has failed because the camera device has been closed, possibly because a higher-priority client has taken ownership of the camera device.

ACAMERA_ERROR_CAMERA_IN_USE

Camera device is being used by another higher priority camera API client.

ACAMERA_ERROR_CAMERA_SERVICE

Camera operation has failed and the camera service has encountered a fatal error.

The Android device may need to be shut down and restarted to restore camera function, or there may be a persistent hardware problem.

An attempt at recovery may be possible by closing the ACameraDevice and the ACameraManager, and trying to acquire all resources again from scratch.

ACAMERA_ERROR_INVALID_OPERATION

Camera operation has failed due to an invalid internal operation.

Usually this is due to a low-level problem that may resolve itself on retry

ACAMERA_ERROR_INVALID_PARAMETER

Camera operation has failed due to an invalid parameter being passed to the method.

ACAMERA_ERROR_MAX_CAMERA_IN_USE

The system-wide limit for number of open cameras or camera resources has been reached, and more camera devices cannot be opened until previous instances are closed.

ACAMERA_ERROR_METADATA_NOT_FOUND

Camera operation has failed due to the requested metadata tag cannot be found in input ACameraMetadata or ACaptureRequest.

ACAMERA_ERROR_NOT_ENOUGH_MEMORY

Camera operation has failed due to insufficient memory.

ACAMERA_ERROR_PERMISSION_DENIED

The application does not have permission to open camera.

ACAMERA_ERROR_SESSION_CLOSED

The ACameraCaptureSession has been closed and cannnot perform any operation other than ACameraCaptureSession_close.

ACAMERA_ERROR_STREAM_CONFIGURE_FAIL

Camera device does not support the stream configuration provided by application in ACameraDevice_createCaptureSession.

ACAMERA_ERROR_UNKNOWN

Camera operation has failed due to an unspecified cause.

ACAMERA_OK

Typedefs

ACameraCaptureFailure

struct ACameraCaptureFailure ACameraCaptureFailure

Struct to describe a capture failure.

ACameraCaptureSession

typedef__BEGIN_DECLS struct ACameraCaptureSession ACameraCaptureSession

ACameraCaptureSession is an opaque type that manages frame captures of a camera device.

A pointer can be obtained using ACameraDevice_createCaptureSession method.

ACameraCaptureSession_captureCallback_bufferLost

void(* ACameraCaptureSession_captureCallback_bufferLost)(void *context, ACameraCaptureSession *session, ACaptureRequest *request, ANativeWindow *window, int64_t frameNumber)

The definition of camera buffer lost callback.

Details
Parameters
context
The optional application context provided by user in ACameraCaptureSession_captureCallbacks.
session
The camera capture session of interest.
request
The capture request of interest. Note that this pointer points to a copy of capture request sent by application, so the address is different to what application sent but the content will match. This request will be freed by framework immediately after this callback returns.
window
The ANativeWindow that the lost buffer would have been sent to.
frameNumber
The frame number of the lost buffer.

ACameraCaptureSession_captureCallback_failed

void(* ACameraCaptureSession_captureCallback_failed)(void *context, ACameraCaptureSession *session, ACaptureRequest *request, ACameraCaptureFailure *failure)

The definition of camera capture failure callback.

Details
Parameters
context
The optional application context provided by user in ACameraCaptureSession_captureCallbacks.
session
The camera capture session of interest.
request
The capture request of interest. Note that this pointer points to a copy of capture request sent by application, so the address is different to what application sent but the content will match. This request will be freed by framework immediately after this callback returns.
failure
The ACameraCaptureFailure desribes the capture failure. The memory is managed by camera framework. Do not access this pointer after this callback returns.

ACameraCaptureSession_captureCallback_result

void(* ACameraCaptureSession_captureCallback_result)(void *context, ACameraCaptureSession *session, ACaptureRequest *request, const ACameraMetadata *result)

The definition of camera capture progress/result callback.

Details
Parameters
context
The optional application context provided by user in ACameraCaptureSession_captureCallbacks.
session
The camera capture session of interest.
request
The capture request of interest. Note that this pointer points to a copy of capture request sent by application, so the address is different to what application sent but the content will match. This request will be freed by framework immediately after this callback returns.
result
The capture result metadata reported by camera device. The memory is managed by camera framework. Do not access this pointer after this callback returns.

ACameraCaptureSession_captureCallback_sequenceAbort

void(* ACameraCaptureSession_captureCallback_sequenceAbort)(void *context, ACameraCaptureSession *session, int sequenceId)

The definition of camera sequence aborted callback.

Details
Parameters
context
The optional application context provided by user in ACameraCaptureSession_captureCallbacks.
session
The camera capture session of interest.
sequenceId
The capture sequence ID of the aborted sequence.

ACameraCaptureSession_captureCallback_sequenceEnd

void(* ACameraCaptureSession_captureCallback_sequenceEnd)(void *context, ACameraCaptureSession *session, int sequenceId, int64_t frameNumber)

The definition of camera sequence end callback.

Details
Parameters
context
The optional application context provided by user in ACameraCaptureSession_captureCallbacks.
session
The camera capture session of interest.
sequenceId
The capture sequence ID of the finished sequence.
frameNumber
The frame number of the last frame of this sequence.

ACameraCaptureSession_captureCallback_start

void(* ACameraCaptureSession_captureCallback_start)(void *context, ACameraCaptureSession *session, const ACaptureRequest *request, int64_t timestamp)

The definition of camera capture start callback.

Details
Parameters
context
The optional application context provided by user in ACameraCaptureSession_captureCallbacks.
session
The camera capture session of interest.
request
The capture request that is starting. Note that this pointer points to a copy of capture request sent by application, so the address is different to what application sent but the content will match. This request will be freed by framework immediately after this callback returns.
timestamp
The timestamp when the capture is started. This timestmap will match ACAMERA_SENSOR_TIMESTAMP of the ACameraMetadata in ACameraCaptureSession_captureCallbacks#onCaptureCompleted callback.

ACameraCaptureSession_captureCallbacks

struct ACameraCaptureSession_captureCallbacks ACameraCaptureSession_captureCallbacks

ACameraCaptureSession_stateCallback

void(* ACameraCaptureSession_stateCallback)(void *context, ACameraCaptureSession *session)

The definition of camera capture session state callback.

Details
Parameters
context
The optional application context provided by user in ACameraCaptureSession_stateCallbacks.
session
The camera capture session whose state is changing.

ACameraCaptureSession_stateCallbacks

struct ACameraCaptureSession_stateCallbacks ACameraCaptureSession_stateCallbacks

ACameraDevice

struct ACameraDevice ACameraDevice

ACameraDevice

typedef__BEGIN_DECLS struct ACameraDevice ACameraDevice

ACameraDevice is opaque type that provides access to a camera device.

A pointer can be obtained using ACameraManager_openCamera method.

ACameraDevice_ErrorStateCallback

void(* ACameraDevice_ErrorStateCallback)(void *context, ACameraDevice *device, int error)

Camera device error state callbacks to be used in ACameraDevice_StateCallbacks.

See also: ERROR_CAMERA_IN_USE See also: ERROR_MAX_CAMERAS_IN_USE See also: ERROR_CAMERA_DISABLED See also: ERROR_CAMERA_DEVICE See also: ERROR_CAMERA_SERVICE

Details
Parameters
context
The optional context in ACameraDevice_StateCallbacks will be passed to this callback.
device
The ACameraDevice that is being disconnected.
error
The error code describes the cause of this error callback. See the folowing links for more detail.

ACameraDevice_StateCallback

void(* ACameraDevice_StateCallback)(void *context, ACameraDevice *device)

Camera device state callbacks to be used in ACameraDevice_StateCallbacks.

Details
Parameters
context
The optional context in ACameraDevice_StateCallbacks will be passed to this callback.
device
The ACameraDevice that is being disconnected.

ACameraDevice_StateCallbacks

struct ACameraDevice_StateCallbacks ACameraDevice_StateCallbacks

ACameraDevice_stateCallbacks

ACameraDevice_StateCallbacks ACameraDevice_stateCallbacks

For backward compatiblity.

ACameraIdList

struct ACameraIdList ACameraIdList

Struct to hold list of camera devices.

ACameraManager

typedef__BEGIN_DECLS struct ACameraManager ACameraManager

ACameraManager is opaque type that provides access to camera service.

A pointer can be obtained using ACameraManager_create method.

ACameraManager_AvailabilityCallback

void(* ACameraManager_AvailabilityCallback)(void *context, const char *cameraId)

Definition of camera availability callbacks.

Details
Parameters
context
The optional application context provided by user in ACameraManager_AvailabilityCallbacks.
cameraId
The ID of the camera device whose availability is changing. The memory of this argument is owned by camera framework and will become invalid immediately after this callback returns.

ACameraManager_AvailabilityCallbacks

struct ACameraManager_AvailabilityListener ACameraManager_AvailabilityCallbacks

A listener for camera devices becoming available or unavailable to open.

Cameras become available when they are no longer in use, or when a new removable camera is connected. They become unavailable when some application or service starts using a camera, or when a removable camera is disconnected.

See also: ACameraManager_registerAvailabilityCallback

ACameraMetadata

typedef__BEGIN_DECLS struct ACameraMetadata ACameraMetadata

ACameraMetadata is opaque type that provides access to read-only camera metadata like camera characteristics (via ACameraManager_getCameraCharacteristics) or capture results (via ACameraCaptureSession_captureCallback_result).

ACameraMetadata_const_entry

struct ACameraMetadata_const_entry ACameraMetadata_const_entry

A single read-only camera metadata entry.

Each entry is an array of values, though many metadata fields may only have 1 entry in the array.

ACameraMetadata_entry

struct ACameraMetadata_entry ACameraMetadata_entry

A single camera metadata entry.

Each entry is an array of values, though many metadata fields may only have 1 entry in the array.

ACameraMetadata_rational

struct ACameraMetadata_rational ACameraMetadata_rational

Definition of rational data type in ACameraMetadata.

ACameraOutputTarget

struct ACameraOutputTarget ACameraOutputTarget

ACameraOutputTargets

typedef__BEGIN_DECLS struct ACameraOutputTargets ACameraOutputTargets

ACaptureRequest

struct ACaptureRequest ACaptureRequest

ACaptureRequest is an opaque type that contains settings and output targets needed to capture a single image from camera device.

ACaptureRequest contains the configuration for the capture hardware (sensor, lens, flash), the processing pipeline, the control algorithms, and the output buffers. Also contains the list of target ANativeWindows to send image data to for this capture.

ACaptureRequest is created by ACameraDevice_createCaptureRequest.

ACaptureRequest is given to ACameraCaptureSession_capture or ACameraCaptureSession_setRepeatingRequest to capture images from a camera.

Each request can specify a different subset of target ANativeWindows for the camera to send the captured data to. All the ANativeWindows used in a request must be part of the ANativeWindow list given to the last call to ACameraDevice_createCaptureSession, when the request is submitted to the session.

For example, a request meant for repeating preview might only include the ANativeWindow for the preview SurfaceView or SurfaceTexture, while a high-resolution still capture would also include a ANativeWindow from a AImageReader configured for high-resolution JPEG images.

See also: ACameraDevice_createCaptureRequest See also: ACameraCaptureSession_capture See also: ACameraCaptureSession_setRepeatingRequest

ACaptureSessionOutput

struct ACaptureSessionOutput ACaptureSessionOutput

ACaptureSessionOutput

struct ACaptureSessionOutput ACaptureSessionOutput

ACaptureSessionOutputContainer

struct ACaptureSessionOutputContainer ACaptureSessionOutputContainer

acamera_metadata_enum_android_black_level_lock_t

enum acamera_metadata_enum_acamera_black_level_lock acamera_metadata_enum_android_black_level_lock_t

acamera_metadata_enum_android_color_correction_aberration_mode_t

enum acamera_metadata_enum_acamera_color_correction_aberration_mode acamera_metadata_enum_android_color_correction_aberration_mode_t

acamera_metadata_enum_android_color_correction_mode_t

enum acamera_metadata_enum_acamera_color_correction_mode acamera_metadata_enum_android_color_correction_mode_t

Enumeration definitions for the various entries that need them.

acamera_metadata_enum_android_control_ae_antibanding_mode_t

enum acamera_metadata_enum_acamera_control_ae_antibanding_mode acamera_metadata_enum_android_control_ae_antibanding_mode_t

acamera_metadata_enum_android_control_ae_lock_available_t

enum acamera_metadata_enum_acamera_control_ae_lock_available acamera_metadata_enum_android_control_ae_lock_available_t

acamera_metadata_enum_android_control_ae_lock_t

enum acamera_metadata_enum_acamera_control_ae_lock acamera_metadata_enum_android_control_ae_lock_t

acamera_metadata_enum_android_control_ae_mode_t

enum acamera_metadata_enum_acamera_control_ae_mode acamera_metadata_enum_android_control_ae_mode_t

acamera_metadata_enum_android_control_ae_precapture_trigger_t

enum acamera_metadata_enum_acamera_control_ae_precapture_trigger acamera_metadata_enum_android_control_ae_precapture_trigger_t

acamera_metadata_enum_android_control_ae_state_t

enum acamera_metadata_enum_acamera_control_ae_state acamera_metadata_enum_android_control_ae_state_t

acamera_metadata_enum_android_control_af_mode_t

enum acamera_metadata_enum_acamera_control_af_mode acamera_metadata_enum_android_control_af_mode_t

acamera_metadata_enum_android_control_af_scene_change_t

enum acamera_metadata_enum_acamera_control_af_scene_change acamera_metadata_enum_android_control_af_scene_change_t

acamera_metadata_enum_android_control_af_state_t

enum acamera_metadata_enum_acamera_control_af_state acamera_metadata_enum_android_control_af_state_t

acamera_metadata_enum_android_control_af_trigger_t

enum acamera_metadata_enum_acamera_control_af_trigger acamera_metadata_enum_android_control_af_trigger_t

acamera_metadata_enum_android_control_awb_lock_available_t

enum acamera_metadata_enum_acamera_control_awb_lock_available acamera_metadata_enum_android_control_awb_lock_available_t

acamera_metadata_enum_android_control_awb_lock_t

enum acamera_metadata_enum_acamera_control_awb_lock acamera_metadata_enum_android_control_awb_lock_t

acamera_metadata_enum_android_control_awb_mode_t

enum acamera_metadata_enum_acamera_control_awb_mode acamera_metadata_enum_android_control_awb_mode_t

acamera_metadata_enum_android_control_awb_state_t

enum acamera_metadata_enum_acamera_control_awb_state acamera_metadata_enum_android_control_awb_state_t

acamera_metadata_enum_android_control_capture_intent_t

enum acamera_metadata_enum_acamera_control_capture_intent acamera_metadata_enum_android_control_capture_intent_t

acamera_metadata_enum_android_control_effect_mode_t

enum acamera_metadata_enum_acamera_control_effect_mode acamera_metadata_enum_android_control_effect_mode_t

acamera_metadata_enum_android_control_enable_zsl_t

enum acamera_metadata_enum_acamera_control_enable_zsl acamera_metadata_enum_android_control_enable_zsl_t

acamera_metadata_enum_android_control_mode_t

enum acamera_metadata_enum_acamera_control_mode acamera_metadata_enum_android_control_mode_t

acamera_metadata_enum_android_control_scene_mode_t

enum acamera_metadata_enum_acamera_control_scene_mode acamera_metadata_enum_android_control_scene_mode_t

acamera_metadata_enum_android_control_video_stabilization_mode_t

enum acamera_metadata_enum_acamera_control_video_stabilization_mode acamera_metadata_enum_android_control_video_stabilization_mode_t

acamera_metadata_enum_android_depth_available_depth_stream_configurations_t

enum acamera_metadata_enum_acamera_depth_available_depth_stream_configurations acamera_metadata_enum_android_depth_available_depth_stream_configurations_t

acamera_metadata_enum_android_depth_depth_is_exclusive_t

enum acamera_metadata_enum_acamera_depth_depth_is_exclusive acamera_metadata_enum_android_depth_depth_is_exclusive_t

acamera_metadata_enum_android_distortion_correction_mode_t

enum acamera_metadata_enum_acamera_distortion_correction_mode acamera_metadata_enum_android_distortion_correction_mode_t

acamera_metadata_enum_android_edge_mode_t

enum acamera_metadata_enum_acamera_edge_mode acamera_metadata_enum_android_edge_mode_t

acamera_metadata_enum_android_flash_info_available_t

enum acamera_metadata_enum_acamera_flash_info_available acamera_metadata_enum_android_flash_info_available_t

acamera_metadata_enum_android_flash_mode_t

enum acamera_metadata_enum_acamera_flash_mode acamera_metadata_enum_android_flash_mode_t

acamera_metadata_enum_android_flash_state_t

enum acamera_metadata_enum_acamera_flash_state acamera_metadata_enum_android_flash_state_t

acamera_metadata_enum_android_hot_pixel_mode_t

enum acamera_metadata_enum_acamera_hot_pixel_mode acamera_metadata_enum_android_hot_pixel_mode_t

acamera_metadata_enum_android_info_supported_hardware_level_t

enum acamera_metadata_enum_acamera_info_supported_hardware_level acamera_metadata_enum_android_info_supported_hardware_level_t

acamera_metadata_enum_android_lens_facing_t

enum acamera_metadata_enum_acamera_lens_facing acamera_metadata_enum_android_lens_facing_t

acamera_metadata_enum_android_lens_info_focus_distance_calibration_t

enum acamera_metadata_enum_acamera_lens_info_focus_distance_calibration acamera_metadata_enum_android_lens_info_focus_distance_calibration_t

acamera_metadata_enum_android_lens_optical_stabilization_mode_t

enum acamera_metadata_enum_acamera_lens_optical_stabilization_mode acamera_metadata_enum_android_lens_optical_stabilization_mode_t

acamera_metadata_enum_android_lens_pose_reference_t

enum acamera_metadata_enum_acamera_lens_pose_reference acamera_metadata_enum_android_lens_pose_reference_t

acamera_metadata_enum_android_lens_state_t

enum acamera_metadata_enum_acamera_lens_state acamera_metadata_enum_android_lens_state_t

acamera_metadata_enum_android_logical_multi_camera_sensor_sync_type_t

enum acamera_metadata_enum_acamera_logical_multi_camera_sensor_sync_type acamera_metadata_enum_android_logical_multi_camera_sensor_sync_type_t

acamera_metadata_enum_android_noise_reduction_mode_t

enum acamera_metadata_enum_acamera_noise_reduction_mode acamera_metadata_enum_android_noise_reduction_mode_t

acamera_metadata_enum_android_request_available_capabilities_t

enum acamera_metadata_enum_acamera_request_available_capabilities acamera_metadata_enum_android_request_available_capabilities_t

acamera_metadata_enum_android_scaler_available_stream_configurations_t

enum acamera_metadata_enum_acamera_scaler_available_stream_configurations acamera_metadata_enum_android_scaler_available_stream_configurations_t

acamera_metadata_enum_android_scaler_cropping_type_t

enum acamera_metadata_enum_acamera_scaler_cropping_type acamera_metadata_enum_android_scaler_cropping_type_t

acamera_metadata_enum_android_sensor_info_color_filter_arrangement_t

enum acamera_metadata_enum_acamera_sensor_info_color_filter_arrangement acamera_metadata_enum_android_sensor_info_color_filter_arrangement_t

acamera_metadata_enum_android_sensor_info_lens_shading_applied_t

enum acamera_metadata_enum_acamera_sensor_info_lens_shading_applied acamera_metadata_enum_android_sensor_info_lens_shading_applied_t

acamera_metadata_enum_android_sensor_info_timestamp_source_t

enum acamera_metadata_enum_acamera_sensor_info_timestamp_source acamera_metadata_enum_android_sensor_info_timestamp_source_t

acamera_metadata_enum_android_sensor_reference_illuminant1_t

enum acamera_metadata_enum_acamera_sensor_reference_illuminant1 acamera_metadata_enum_android_sensor_reference_illuminant1_t

acamera_metadata_enum_android_sensor_test_pattern_mode_t

enum acamera_metadata_enum_acamera_sensor_test_pattern_mode acamera_metadata_enum_android_sensor_test_pattern_mode_t

acamera_metadata_enum_android_shading_mode_t

enum acamera_metadata_enum_acamera_shading_mode acamera_metadata_enum_android_shading_mode_t

acamera_metadata_enum_android_statistics_face_detect_mode_t

enum acamera_metadata_enum_acamera_statistics_face_detect_mode acamera_metadata_enum_android_statistics_face_detect_mode_t

acamera_metadata_enum_android_statistics_hot_pixel_map_mode_t

enum acamera_metadata_enum_acamera_statistics_hot_pixel_map_mode acamera_metadata_enum_android_statistics_hot_pixel_map_mode_t

acamera_metadata_enum_android_statistics_lens_shading_map_mode_t

enum acamera_metadata_enum_acamera_statistics_lens_shading_map_mode acamera_metadata_enum_android_statistics_lens_shading_map_mode_t

acamera_metadata_enum_android_statistics_ois_data_mode_t

enum acamera_metadata_enum_acamera_statistics_ois_data_mode acamera_metadata_enum_android_statistics_ois_data_mode_t

acamera_metadata_enum_android_statistics_scene_flicker_t

enum acamera_metadata_enum_acamera_statistics_scene_flicker acamera_metadata_enum_android_statistics_scene_flicker_t

acamera_metadata_enum_android_sync_frame_number_t

enum acamera_metadata_enum_acamera_sync_frame_number acamera_metadata_enum_android_sync_frame_number_t

acamera_metadata_enum_android_sync_max_latency_t

enum acamera_metadata_enum_acamera_sync_max_latency acamera_metadata_enum_android_sync_max_latency_t

acamera_metadata_enum_android_tonemap_mode_t

enum acamera_metadata_enum_acamera_tonemap_mode acamera_metadata_enum_android_tonemap_mode_t

acamera_metadata_enum_android_tonemap_preset_curve_t

enum acamera_metadata_enum_acamera_tonemap_preset_curve acamera_metadata_enum_android_tonemap_preset_curve_t

acamera_metadata_section_start_t

enum acamera_metadata_section_start acamera_metadata_section_start_t

Hierarchy positions in enum space.

acamera_metadata_section_t

__BEGIN_DECLS enum acamera_metadata_section acamera_metadata_section_t

acamera_metadata_tag_t

enum acamera_metadata_tag acamera_metadata_tag_t

Main enum for camera metadata tags.

Functions

ACameraCaptureSession_abortCaptures

camera_status_t ACameraCaptureSession_abortCaptures(
  ACameraCaptureSession *session
)

Discard all captures currently pending and in-progress as fast as possible.

The camera device will discard all of its current work as fast as possible. Some in-flight captures may complete successfully and call ACameraCaptureSession_captureCallbacks#onCaptureCompleted, while others will trigger their ACameraCaptureSession_captureCallbacks#onCaptureFailed callbacks. If a repeating request list is set, it will be cleared.

This method is the fastest way to switch the camera device to a new session with ACameraDevice_createCaptureSession, at the cost of discarding in-progress work. It must be called before the new session is created. Once all pending requests are either completed or thrown away, the ACameraCaptureSession_stateCallbacks#onReady callback will be called, if the session has not been closed. Otherwise, the ACameraCaptureSession_stateCallbacks#onClosed callback will be fired when a new session is created by the camera device and the previous session is being removed from memory.

Cancelling will introduce at least a brief pause in the stream of data from the camera device, since once the camera device is emptied, the first new request has to make it through the entire camera pipeline before new output buffers are produced.

This means that using ACameraCaptureSession_abortCaptures to simply remove pending requests is not recommended; it's best used for quickly switching output configurations, or for cancelling long in-progress requests (such as a multi-second capture).

Details
Parameters
session
the capture session of interest
Returns

ACameraCaptureSession_capture

camera_status_t ACameraCaptureSession_capture(
  ACameraCaptureSession *session,
  ACameraCaptureSession_captureCallbacks *callbacks,
  int numRequests,
  ACaptureRequest **requests,
  int *captureSequenceId
)

Submit an array of requests to be captured in sequence as a burst in the minimum of time possible.

The burst will be captured in the minimum amount of time possible, and will not be interleaved with requests submitted by other capture or repeat calls.

Each capture produces one ACameraMetadata as a capture result and image buffers for one or more target ANativeWindows. The target ANativeWindows (set with ACaptureRequest_addTarget) must be a subset of the ANativeWindow provided when this capture session was created.

Details
Parameters
session
the capture session of interest
callbacks
the ACameraCaptureSession_captureCallbacks to be associated this capture sequence. No capture callback will be fired if this is set to NULL.
numRequests
number of requests in requests argument. Must be at least 1.
requests
an array of ACaptureRequest to be captured. Length must be at least numRequests.
captureSequenceId
the capture sequence ID associated with this capture method invocation will be stored here if this argument is not NULL and the method call succeeds. When this argument is set to NULL, the capture sequence ID will not be returned.
Returns

ACameraCaptureSession_close

void ACameraCaptureSession_close(
  ACameraCaptureSession *session
)

Close this capture session.

Closing a session frees up the target output Surfaces of the session for reuse with either a new session, or to other APIs that can draw to Surfaces.

Note that creating a new capture session with ACameraDevice_createCaptureSession will close any existing capture session automatically, and call the older session listener's ACameraCaptureSession_stateCallbacks#onClosed callback. Using ACameraDevice_createCaptureSession directly without closing is the recommended approach for quickly switching to a new session, since unchanged target outputs can be reused more efficiently.

After a session is closed and before ACameraCaptureSession_stateCallbacks#onClosed is called, all methods invoked on the session will return ACAMERA_ERROR_SESSION_CLOSED, and any repeating requests are stopped (as if ACameraCaptureSession_stopRepeating was called). However, any in-progress capture requests submitted to the session will be completed as normal; once all captures have completed and the session has been torn down, ACameraCaptureSession_stateCallbacks#onClosed callback will be called and the seesion will be removed from memory.

Closing a session is idempotent; closing more than once has no effect.

Details
Parameters
session
the capture session of interest

ACameraCaptureSession_getDevice

camera_status_t ACameraCaptureSession_getDevice(
  ACameraCaptureSession *session,
  ACameraDevice **device
)

Get the ACameraDevice pointer associated with this capture session in the device argument if the method succeeds.

Details
Parameters
session
the capture session of interest
device
the ACameraDevice associated with session. Will be set to NULL if the session is closed or this method fails.
Returns

ACameraCaptureSession_setRepeatingRequest

camera_status_t ACameraCaptureSession_setRepeatingRequest(
  ACameraCaptureSession *session,
  ACameraCaptureSession_captureCallbacks *callbacks,
  int numRequests,
  ACaptureRequest **requests,
  int *captureSequenceId
)

Request endlessly repeating capture of a sequence of images by this capture session.

With this method, the camera device will continually capture images, cycling through the settings in the provided list of ACaptureRequest, at the maximum rate possible.

If a request is submitted through ACameraCaptureSession_capture, the current repetition of the request list will be completed before the higher-priority request is handled. This guarantees that the application always receives a complete repeat burst captured in minimal time, instead of bursts interleaved with higher-priority captures, or incomplete captures.

Repeating burst requests are a simple way for an application to maintain a preview or other continuous stream of frames where each request is different in a predicatable way, without having to continually submit requests through ACameraCaptureSession_capture.

To stop the repeating capture, call ACameraCaptureSession_stopRepeating. Any ongoing burst will still be completed, however. Calling ACameraCaptureSession_abortCaptures will also clear the request.

Calling this method will replace a previously-set repeating requests set up by this method, although any in-progress burst will be completed before the new repeat burst will be used.

Details
Parameters
session
the capture session of interest
callbacks
the ACameraCaptureSession_captureCallbacks to be associated with this capture sequence. No capture callback will be fired if callbacks is set to NULL.
numRequests
number of requests in requests array. Must be at least 1.
requests
an array of ACaptureRequest to be captured. Length must be at least numRequests.
captureSequenceId
the capture sequence ID associated with this capture method invocation will be stored here if this argument is not NULL and the method call succeeds. When this argument is set to NULL, the capture sequence ID will not be returned.
Returns

ACameraCaptureSession_stopRepeating

camera_status_t ACameraCaptureSession_stopRepeating(
  ACameraCaptureSession *session
)

Cancel any ongoing repeating capture set by ACameraCaptureSession_setRepeatingRequest.

Has no effect on requests submitted through ACameraCaptureSession_capture.

Any currently in-flight captures will still complete, as will any burst that is mid-capture. To ensure that the device has finished processing all of its capture requests and is in ready state, wait for the ACameraCaptureSession_stateCallbacks#onReady callback after calling this method.

Details
Parameters
session
the capture session of interest
Returns

ACameraCaptureSession_updateSharedOutput

camera_status_t ACameraCaptureSession_updateSharedOutput(
  ACameraCaptureSession *session,
  ACaptureSessionOutput *output
)

Update shared ACaptureSessionOutput.

A shared ACaptureSessionOutput (see ACaptureSessionSharedOutput_create) that was modified via calls to ACaptureSessionSharedOutput_add or ACaptureSessionSharedOutput_remove must be updated by calling this method before its changes take effect. After the update call returns with ACAMERA_OK, any newly added native windows can be used as a target in subsequent capture requests.

Native windows that get removed must not be part of any active repeating or single/burst request or have any pending results. Consider updating repeating requests via ACaptureSessionOutput_setRepeatingRequest and then wait for the last frame number when the sequence completes ACameraCaptureSession_captureCallback#onCaptureSequenceCompleted.

Native windows that get added must not be part of any other registered ACaptureSessionOutput and must be compatible. Compatible windows must have matching format, rotation and consumer usage.

A shared ACameraCaptureSession can support up to 4 additional native windows.

Details
Parameters
session
the capture session of interest
output
the modified output configuration
Returns

ACameraDevice_close

camera_status_t ACameraDevice_close(
  ACameraDevice *device
)

Close the connection and free this ACameraDevice synchronously.

Access to the ACameraDevice after calling this method will cause a crash.

After this call, all calls to the active ACameraCaptureSession associated to this ACameraDevice will return ACAMERA_ERROR_SESSION_CLOSED except for calls to ACameraCaptureSession_close.

This method will stop all repeating captures sent via ACameraCaptureSession_setRepeatingRequest and block until all capture requests sent via ACameraCaptureSession_capture is complete. Once the method returns, the camera device will be removed from memory and access to the closed camera device pointer will cause a crash.

Details
Parameters
device
the camera device to be closed
Returns

ACameraDevice_createCaptureRequest

camera_status_t ACameraDevice_createCaptureRequest(
  const ACameraDevice *device,
  ACameraDevice_request_template templateId,
  ACaptureRequest **request
)

Create a ACaptureRequest for capturing images, initialized with template for a target use case.

The settings are chosen to be the best options for this camera device, so it is not recommended to reuse the same request for a different camera device.

See also: TEMPLATE_PREVIEW See also: TEMPLATE_RECORD See also: TEMPLATE_STILL_CAPTURE See also: TEMPLATE_VIDEO_SNAPSHOT See also: TEMPLATE_MANUAL

Details
Parameters
device
the camera device of interest
templateId
the type of capture request to be created. See ACameraDevice_request_template.
request
the output request will be stored here if the method call succeeds.
Returns

ACameraDevice_createCaptureSession

camera_status_t ACameraDevice_createCaptureSession(
  ACameraDevice *device,
  const ACaptureSessionOutputContainer *outputs,
  const ACameraCaptureSession_stateCallbacks *callbacks,
  ACameraCaptureSession **session
)

Create a new camera capture session by providing the target output set of ANativeWindow to the camera device.

If there is a preexisting session, the previous session will be closed automatically. However, app still needs to call ACameraCaptureSession_close on previous session. Otherwise the resources held by previous session will NOT be freed.

The active capture session determines the set of potential output ANativeWindows for the camera device for each capture request. A given request may use all or only some of the outputs. Once the ACameraCaptureSession is created, requests can be submitted with ACameraCaptureSession_capture or ACameraCaptureSession_setRepeatingRequest.

Often the ANativeWindow used with this method can be obtained from a Surface java object by ANativeWindow_fromSurface NDK method. Surfaces or ANativeWindow suitable for inclusion as a camera output can be created for various use cases and targets:

The camera device will query each ANativeWindow's size and formats upon this call, so they must be set to a valid setting at this time.

It can take several hundred milliseconds for the session's configuration to complete, since camera hardware may need to be powered on or reconfigured.

If a prior ACameraCaptureSession already exists when this method is called, the previous session will no longer be able to accept new capture requests and will be closed. Any in-progress capture requests made on the prior session will be completed before it's closed. To minimize the transition time, the ACameraCaptureSession_abortCaptures method can be used to discard the remaining requests for the prior capture session before a new one is created. Note that once the new session is created, the old one can no longer have its captures aborted.

Using larger resolution outputs, or more outputs, can result in slower output rate from the device.

Configuring a session with an empty list will close the current session, if any. This can be used to release the current session's target surfaces for another use.

While any of the sizes from ACAMERA_SCALER_AVAILABLE_STREAM_CONFIGURATIONS can be used when a single output stream is configured, a given camera device may not be able to support all combination of sizes, formats, and targets when multiple outputs are configured at once. The tables below list the maximum guaranteed resolutions for combinations of streams and targets, given the capabilities of the camera device.

If an application tries to create a session using a set of targets that exceed the limits described in the below tables, one of three possibilities may occur. First, the session may be successfully created and work normally. Second, the session may be successfully created, but the camera device won't meet the frame rate guarantees as described in ACAMERA_SCALER_AVAILABLE_MIN_FRAME_DURATIONS. Or third, if the output set cannot be used at all, session creation will fail entirely, with ACAMERA_ERROR_STREAM_CONFIGURE_FAIL being returned.

For the type column PRIV refers to output format AIMAGE_FORMAT_PRIVATE, YUV refers to output format AIMAGE_FORMAT_YUV_420_888, JPEG refers to output format AIMAGE_FORMAT_JPEG, and RAW refers to output format AIMAGE_FORMAT_RAW16

For the maximum size column, PREVIEW refers to the best size match to the device's screen resolution, or to 1080p (1920x1080), whichever is smaller. RECORD refers to the camera device's maximum supported recording resolution, as determined by android.media.CamcorderProfiles. And MAXIMUM refers to the camera device's maximum output resolution for that format or target from ACAMERA_SCALER_AVAILABLE_STREAM_CONFIGURATIONS.

To use these tables, determine the number and the formats/targets of outputs needed, and find the row(s) of the table with those targets. The sizes indicate the maximum set of sizes that can be used; it is guaranteed that for those targets, the listed sizes and anything smaller from the list given by ACAMERA_SCALER_AVAILABLE_STREAM_CONFIGURATIONS can be successfully used to create a session. For example, if a row indicates that a 8 megapixel (MP) YUV_420_888 output can be used together with a 2 MP PRIV output, then a session can be created with targets [8 MP YUV, 2 MP PRIV] or targets [2 MP YUV, 2 MP PRIV]; but a session with targets [8 MP YUV, 4 MP PRIV], targets [4 MP YUV, 4 MP PRIV], or targets [8 MP PRIV, 2 MP YUV] would not be guaranteed to work, unless some other row of the table lists such a combination.

Legacy devices (ACAMERA_INFO_SUPPORTED_HARDWARE_LEVEL==LEGACY) support at least the following stream combinations:

LEGACY-level guaranteed configurations
Target 1 Target 2 Target 3 Sample use case(s)
Type Max size Type Max size Type Max size
PRIV MAXIMUM Simple preview, GPU video processing, or no-preview video recording.
JPEG MAXIMUM No-viewfinder still image capture.
YUV MAXIMUM In-application video/image processing.
PRIV PREVIEW JPEG MAXIMUM Standard still imaging.
YUV PREVIEW JPEG MAXIMUM In-app processing plus still capture.
PRIV PREVIEW PRIV PREVIEW Standard recording.
PRIV PREVIEW YUV PREVIEW Preview plus in-app processing.
PRIV PREVIEW YUV PREVIEW JPEG MAXIMUM Still capture plus in-app processing.

Limited-level (ACAMERA_INFO_SUPPORTED_HARDWARE_LEVEL==LIMITED) devices support at least the following stream combinations in addition to those for LEGACY devices:

LIMITED-level additional guaranteed configurations
Target 1 Target 2 Target 3 Sample use case(s)
Type Max size Type Max size Type Max size
PRIV PREVIEW PRIV RECORD High-resolution video recording with preview.
PRIV PREVIEW YUV RECORD High-resolution in-app video processing with preview.
YUV PREVIEW YUV RECORD Two-input in-app video processing.
PRIV PREVIEW PRIV RECORD JPEG RECORD High-resolution recording with video snapshot.
PRIV PREVIEW YUV RECORD JPEG RECORD High-resolution in-app processing with video snapshot.
YUV PREVIEW YUV PREVIEW JPEG MAXIMUM Two-input in-app processing with still capture.

FULL-level (ACAMERA_INFO_SUPPORTED_HARDWARE_LEVEL==FULL) devices support at least the following stream combinations in addition to those for LIMITED devices:

FULL-level additional guaranteed configurations
Target 1 Target 2 Target 3 Sample use case(s)
Type Max size Type Max size Type Max size
PRIV PREVIEW PRIV MAXIMUM Maximum-resolution GPU processing with preview.
PRIV PREVIEW YUV MAXIMUM Maximum-resolution in-app processing with preview.
YUV PREVIEW YUV MAXIMUM Maximum-resolution two-input in-app processsing.
PRIV PREVIEW PRIV PREVIEW JPEG MAXIMUM Video recording with maximum-size video snapshot
YUV 640x480 PRIV PREVIEW YUV MAXIMUM Standard video recording plus maximum-resolution in-app processing.
YUV 640x480 YUV PREVIEW YUV MAXIMUM Preview plus two-input maximum-resolution in-app processing.

RAW-capability (ACAMERA_REQUEST_AVAILABLE_CAPABILITIES includes RAW) devices additionally support at least the following stream combinations on both FULL and LIMITED devices:

RAW-capability additional guaranteed configurations
Target 1 Target 2 Target 3 Sample use case(s)
Type Max size Type Max size Type Max size
RAW MAXIMUM No-preview DNG capture.
PRIV PREVIEW RAW MAXIMUM Standard DNG capture.
YUV PREVIEW RAW MAXIMUM In-app processing plus DNG capture.
PRIV PREVIEW PRIV PREVIEW RAW MAXIMUM Video recording with DNG capture.
PRIV PREVIEW YUV PREVIEW RAW MAXIMUM Preview with in-app processing and DNG capture.
YUV PREVIEW YUV PREVIEW RAW MAXIMUM Two-input in-app processing plus DNG capture.
PRIV PREVIEW JPEG MAXIMUM RAW MAXIMUM Still capture with simultaneous JPEG and DNG.
YUV PREVIEW JPEG MAXIMUM RAW MAXIMUM In-app processing with simultaneous JPEG and DNG.

BURST-capability (ACAMERA_REQUEST_AVAILABLE_CAPABILITIES includes BURST_CAPTURE) devices support at least the below stream combinations in addition to those for LIMITED devices. Note that all FULL-level devices support the BURST capability, and the below list is a strict subset of the list for FULL-level devices, so this table is only relevant for LIMITED-level devices that support the BURST_CAPTURE capability.

BURST-capability additional guaranteed configurations
Target 1 Target 2 Sample use case(s)
Type Max size Type Max size
PRIV PREVIEW PRIV MAXIMUM Maximum-resolution GPU processing with preview.
PRIV PREVIEW YUV MAXIMUM Maximum-resolution in-app processing with preview.
YUV PREVIEW YUV MAXIMUM Maximum-resolution two-input in-app processsing.

LEVEL-3 (ACAMERA_INFO_SUPPORTED_HARDWARE_LEVEL==LEVEL_3) support at least the following stream combinations in addition to the combinations for FULL and for RAW capability (ACAMERA_REQUEST_AVAILABLE_CAPABILITIES includes RAW):

LEVEL-3 additional guaranteed configurations
Target 1 Target 2 Target 3 Target 4 Sample use case(s)
Type Max size Type Max size Type Max size Type Max size
PRIV PREVIEW PRIV 640x480 YUV MAXIMUM RAW MAXIMUM In-app viewfinder analysis with dynamic selection of output format.
PRIV PREVIEW PRIV 640x480 JPEG MAXIMUM RAW MAXIMUM In-app viewfinder analysis with dynamic selection of output format.

Since the capabilities of camera devices vary greatly, a given camera device may support target combinations with sizes outside of these guarantees, but this can only be tested for by attempting to create a session with such targets.

Details
Parameters
device
the camera device of interest.
outputs
the ACaptureSessionOutputContainer describes all output streams.
callbacks
session
the created ACameraCaptureSession will be filled here if the method call succeeds.
Returns

ACameraDevice_createCaptureSessionWithSessionParameters

camera_status_t ACameraDevice_createCaptureSessionWithSessionParameters(
  ACameraDevice *device,
  const ACaptureSessionOutputContainer *outputs,
  const ACaptureRequest *sessionParameters,
  const ACameraCaptureSession_stateCallbacks *callbacks,
  ACameraCaptureSession **session
)

Create a new camera capture session similar to ACameraDevice_createCaptureSession.

This function allows clients to pass additional session parameters during session initialization. For further information about session parameters see ACAMERA_REQUEST_AVAILABLE_SESSION_KEYS.

Details
Parameters
device
the camera device of interest.
outputs
the ACaptureSessionOutputContainer describes all output streams.
sessionParameters
An optional capture request that contains the initial values of session parameters advertised in ACAMERA_REQUEST_AVAILABLE_SESSION_KEYS.
callbacks
the ACameraCaptureSession_stateCallbacks capture session state callbacks.
session
the created ACameraCaptureSession will be filled here if the method call succeeds.
Returns

ACameraDevice_getId

const char * ACameraDevice_getId(
  const ACameraDevice *device
)

Return the camera id associated with this camera device.

Details
Parameters
device
the camera device to be closed
Returns
camera ID string. The returned string is managed by framework and should not be delete/free by the application. Also the returned string must not be used after the device has been closed.

ACameraManager_create

ACameraManager * ACameraManager_create()

Create ACameraManager instance.

The ACameraManager is responsible for detecting, characterizing, and connecting to ACameraDevices.

The caller must call ACameraManager_delete to free the resources once it is done using the ACameraManager instance.

Details
Returns
a ACameraManager instance.

ACameraManager_delete

void ACameraManager_delete(
  ACameraManager *manager
)

Delete the ACameraManager instance and free its resources.

Details
Parameters
manager
the ACameraManager instance to be deleted.

ACameraManager_deleteCameraIdList

void ACameraManager_deleteCameraIdList(
  ACameraIdList *cameraIdList
)

Delete a list of camera devices allocated via ACameraManager_getCameraIdList.

Details
Parameters
cameraIdList
the ACameraIdList to be deleted.

ACameraManager_getCameraCharacteristics

camera_status_t ACameraManager_getCameraCharacteristics(
  ACameraManager *manager,
  const char *cameraId,
  ACameraMetadata **characteristics
)

Query the capabilities of a camera device.

These capabilities are immutable for a given camera.

See ACameraMetadata document and NdkCameraMetadataTags.h for more details.

The caller must call ACameraMetadata_free to free the memory of the output characteristics.

Details
Parameters
manager
the ACameraManager of interest.
cameraId
the ID string of the camera device of interest.
characteristics
the output ACameraMetadata will be filled here if the method call succeeeds.
Returns

ACameraManager_getCameraIdList

camera_status_t ACameraManager_getCameraIdList(
  ACameraManager *manager,
  ACameraIdList **cameraIdList
)

Create a list of currently connected camera devices, including cameras that may be in use by other camera API clients.

Non-removable cameras use integers starting at 0 for their identifiers, while removable cameras have a unique identifier for each individual device, even if they are the same model.

ACameraManager_getCameraIdList will allocate and return an ACameraIdList. The caller must call ACameraManager_deleteCameraIdList to free the memory

Details
Parameters
manager
the ACameraManager of interest
cameraIdList
the output ACameraIdList will be filled in here if the method call succeeds.
Returns

ACameraManager_openCamera

camera_status_t ACameraManager_openCamera(
  ACameraManager *manager,
  const char *cameraId,
  ACameraDevice_StateCallbacks *callback,
  ACameraDevice **device
)

Open a connection to a camera with the given ID.

The opened camera device will be returned in the device parameter.

Use ACameraManager_getCameraIdList to get the list of available camera devices. Note that even if an id is listed, open may fail if the device is disconnected between the calls to ACameraManager_getCameraIdList and ACameraManager_openCamera, or if a higher-priority camera API client begins using the camera device.

Devices for which the ACameraManager_AvailabilityCallbacks#onCameraUnavailable callback has been called due to the device being in use by a lower-priority, background camera API client can still potentially be opened by calling this method when the calling camera API client has a higher priority than the current camera API client using this device. In general, if the top, foreground activity is running within your application process, your process will be given the highest priority when accessing the camera, and this method will succeed even if the camera device is in use by another camera API client. Any lower-priority application that loses control of the camera in this way will receive an ACameraDevice_StateCallbacks#onDisconnected callback.

Once the camera is successfully opened,the ACameraDevice can then be set up for operation by calling ACameraDevice_createCaptureSession and ACameraDevice_createCaptureRequest.

If the camera becomes disconnected after this function call returns, ACameraDevice_StateCallbacks#onDisconnected with a ACameraDevice in the disconnected state will be called.

If the camera runs into error after this function call returns, ACameraDevice_StateCallbacks#onError with a ACameraDevice in the error state will be called.

Details
Parameters
manager
the ACameraManager of interest.
cameraId
the ID string of the camera device to be opened.
callback
the ACameraDevice_StateCallbacks associated with the opened camera device.
device
the opened ACameraDevice will be filled here if the method call succeeds.
Returns

ACameraManager_registerAvailabilityCallback

camera_status_t ACameraManager_registerAvailabilityCallback(
  ACameraManager *manager,
  const ACameraManager_AvailabilityCallbacks *callback
)

Register camera availability callbacks.

onCameraUnavailable will be called whenever a camera device is opened by any camera API client. Other camera API clients may still be able to open such a camera device, evicting the existing client if they have higher priority than the existing client of a camera device. See ACameraManager_openCamera for more details.

The callbacks will be called on a dedicated thread shared among all ACameraManager instances.

Since this callback will be registered with the camera service, remember to unregister it once it is no longer needed; otherwise the callback will continue to receive events indefinitely and it may prevent other resources from being released. Specifically, the callbacks will be invoked independently of the general activity lifecycle and independently of the state of individual ACameraManager instances.

Details
Parameters
manager
the ACameraManager of interest.
callback
Returns

ACameraManager_unregisterAvailabilityCallback

camera_status_t ACameraManager_unregisterAvailabilityCallback(
  ACameraManager *manager,
  const ACameraManager_AvailabilityCallbacks *callback
)

Unregister camera availability callbacks.

Removing a callback that isn't registered has no effect.

Details
Parameters
manager
the ACameraManager of interest.
callback
the ACameraManager_AvailabilityCallbacks to be unregistered.
Returns

ACameraMetadata_copy

ACameraMetadata * ACameraMetadata_copy(
  const ACameraMetadata *src
)

Create a copy of input ACameraMetadata.

The returned ACameraMetadata must be freed by the application by ACameraMetadata_free after application is done using it.

Details
Parameters
src
the input ACameraMetadata to be copied.
Returns
a valid ACameraMetadata pointer or NULL if the input metadata cannot be copied.

ACameraMetadata_free

void ACameraMetadata_free(
  ACameraMetadata *metadata
)

Free a ACameraMetadata structure.

Details
Parameters
metadata
the ACameraMetadata to be freed.

ACameraMetadata_getAllTags

camera_status_t ACameraMetadata_getAllTags(
  const ACameraMetadata *metadata,
  int32_t *numEntries,
  const uint32_t **tags
)

List all the entry tags in input ACameraMetadata.

Details
Parameters
metadata
the ACameraMetadata of interest.
numEntries
number of metadata entries in input ACameraMetadata
tags
the tag values of the metadata entries. Length of tags is returned in numEntries argument. The memory is managed by ACameraMetadata itself and must NOT be free/delete by application. Do NOT access tags after calling ACameraMetadata_free.
Returns

ACameraMetadata_getConstEntry

camera_status_t ACameraMetadata_getConstEntry(
  const ACameraMetadata *metadata,
  uint32_t tag,
  ACameraMetadata_const_entry *entry
)

Get a metadata entry from an input ACameraMetadata.

The memory of the data field in the returned entry is managed by camera framework. Do not attempt to free it.

Details
Parameters
metadata
the ACameraMetadata of interest.
tag
the tag value of the camera metadata entry to be get.
entry
the output ACameraMetadata_const_entry will be filled here if the method call succeeeds.
Returns

ACameraOutputTarget_create

camera_status_t ACameraOutputTarget_create(
  ANativeWindow *window,
  ACameraOutputTarget **output
)

Create a ACameraOutputTarget object.

The ACameraOutputTarget is used in ACaptureRequest_addTarget method to add an output ANativeWindow to ACaptureRequest. Use ACameraOutputTarget_free to free the object and its memory after application no longer needs the ACameraOutputTarget.

See also: ACaptureRequest_addTarget

Details
Parameters
window
the ANativeWindow to be associated with the ACameraOutputTarget
output
the output ACameraOutputTarget will be stored here if the method call succeeds.
Returns

ACameraOutputTarget_free

void ACameraOutputTarget_free(
  ACameraOutputTarget *output
)

Free a ACameraOutputTarget object.

See also: ACameraOutputTarget_create

Details
Parameters
output
the ACameraOutputTarget to be freed.

ACaptureRequest_addTarget

camera_status_t ACaptureRequest_addTarget(
  ACaptureRequest *request,
  const ACameraOutputTarget *output
)

Add an ACameraOutputTarget object to ACaptureRequest.

Details
Parameters
request
the ACaptureRequest of interest.
output
the output ACameraOutputTarget to be added to capture request.
Returns

ACaptureRequest_copy

ACaptureRequest * ACaptureRequest_copy(
  const ACaptureRequest *src
)

Create a copy of input ACaptureRequest.

The returned ACaptureRequest must be freed by the application by ACaptureRequest_free after application is done using it.

Details
Parameters
src
the input ACaptureRequest to be copied.
Returns
a valid ACaptureRequest pointer or NULL if the input request cannot be copied.

ACaptureRequest_free

void ACaptureRequest_free(
  ACaptureRequest *request
)

Free a ACaptureRequest structure.

Details
Parameters
request
the ACaptureRequest to be freed.

ACaptureRequest_getAllTags

camera_status_t ACaptureRequest_getAllTags(
  const ACaptureRequest *request,
  int32_t *numTags,
  const uint32_t **tags
)

ACaptureRequest_getConstEntry

camera_status_t ACaptureRequest_getConstEntry(
  const ACaptureRequest *request,
  uint32_t tag,
  ACameraMetadata_const_entry *entry
)

Get a metadata entry from input ACaptureRequest.

The memory of the data field in returned entry is managed by camera framework. Do not attempt to free it.

Details
Parameters
request
the ACaptureRequest of interest.
tag
the tag value of the camera metadata entry to be get.
entry
the output ACameraMetadata_const_entry will be filled here if the method call succeeeds.
Returns

ACaptureRequest_getUserContext

camera_status_t ACaptureRequest_getUserContext(
  const ACaptureRequest *request,
  void **context
)

Get the user context pointer of the ACaptureRequest.

This method is useful for user to identify the capture request in capture session callbacks. The context is NULL for newly created request.

Details
Parameters
request
the ACaptureRequest of interest.
context
the user context pointer of this capture request.
Returns

ACaptureRequest_removeTarget

camera_status_t ACaptureRequest_removeTarget(
  ACaptureRequest *request,
  const ACameraOutputTarget *output
)

Remove an ACameraOutputTarget object from ACaptureRequest.

This method has no effect if the ACameraOutputTarget does not exist in ACaptureRequest.

Details
Parameters
request
the ACaptureRequest of interest.
output
the output ACameraOutputTarget to be removed from capture request.
Returns

ACaptureRequest_setEntry_double

camera_status_t ACaptureRequest_setEntry_double(
  ACaptureRequest *request,
  uint32_t tag,
  uint32_t count,
  const double *data
)

Set/change a camera capture control entry with double data type.

Set count to 0 and data to NULL to remove a tag from the capture request.

Details
Parameters
request
the ACaptureRequest of interest.
tag
the tag value of the camera metadata entry to be set.
count
number of elements to be set in data argument
data
the entries to be set/change in the capture request.
Returns
  • ACAMERA_OK if the method call succeeds.
  • ACAMERA_ERROR_INVALID_PARAMETER if request is NULL, count is larger than zero while data is NULL, the data type of the tag is not double, or the tag is not controllable by application.

ACaptureRequest_setEntry_float

camera_status_t ACaptureRequest_setEntry_float(
  ACaptureRequest *request,
  uint32_t tag,
  uint32_t count,
  const float *data
)

Set/change a camera capture control entry with float data type.

Set count to 0 and data to NULL to remove a tag from the capture request.

Details
Parameters
request
the ACaptureRequest of interest.
tag
the tag value of the camera metadata entry to be set.
count
number of elements to be set in data argument
data
the entries to be set/change in the capture request.
Returns
  • ACAMERA_OK if the method call succeeds.
  • ACAMERA_ERROR_INVALID_PARAMETER if request is NULL, count is larger than zero while data is NULL, the data type of the tag is not float, or the tag is not controllable by application.

ACaptureRequest_setEntry_i32

camera_status_t ACaptureRequest_setEntry_i32(
  ACaptureRequest *request,
  uint32_t tag,
  uint32_t count,
  const int32_t *data
)

Set/change a camera capture control entry with signed 32 bits data type.

Set count to 0 and data to NULL to remove a tag from the capture request.

Details
Parameters
request
the ACaptureRequest of interest.
tag
the tag value of the camera metadata entry to be set.
count
number of elements to be set in data argument
data
the entries to be set/change in the capture request.
Returns
  • ACAMERA_OK if the method call succeeds.
  • ACAMERA_ERROR_INVALID_PARAMETER if request is NULL, count is larger than zero while data is NULL, the data type of the tag is not signed 32 bits, or the tag is not controllable by application.

ACaptureRequest_setEntry_i64

camera_status_t ACaptureRequest_setEntry_i64(
  ACaptureRequest *request,
  uint32_t tag,
  uint32_t count,
  const int64_t *data
)

Set/change a camera capture control entry with signed 64 bits data type.

Set count to 0 and data to NULL to remove a tag from the capture request.

Details
Parameters
request
the ACaptureRequest of interest.
tag
the tag value of the camera metadata entry to be set.
count
number of elements to be set in data argument
data
the entries to be set/change in the capture request.
Returns
  • ACAMERA_OK if the method call succeeds.
  • ACAMERA_ERROR_INVALID_PARAMETER if request is NULL, count is larger than zero while data is NULL, the data type of the tag is not signed 64 bits, or the tag is not controllable by application.

ACaptureRequest_setEntry_rational

camera_status_t ACaptureRequest_setEntry_rational(
  ACaptureRequest *request,
  uint32_t tag,
  uint32_t count,
  const ACameraMetadata_rational *data
)

Set/change a camera capture control entry with rational data type.

Set count to 0 and data to NULL to remove a tag from the capture request.

Details
Parameters
request
the ACaptureRequest of interest.
tag
the tag value of the camera metadata entry to be set.
count
number of elements to be set in data argument
data
the entries to be set/change in the capture request.
Returns
  • ACAMERA_OK if the method call succeeds.
  • ACAMERA_ERROR_INVALID_PARAMETER if request is NULL, count is larger than zero while data is NULL, the data type of the tag is not rational, or the tag is not controllable by application.

ACaptureRequest_setEntry_u8

camera_status_t ACaptureRequest_setEntry_u8(
  ACaptureRequest *request,
  uint32_t tag,
  uint32_t count,
  const uint8_t *data
)

Set/change a camera capture control entry with unsigned 8 bits data type.

Set count to 0 and data to NULL to remove a tag from the capture request.

Details
Parameters
request
the ACaptureRequest of interest.
tag
the tag value of the camera metadata entry to be set.
count
number of elements to be set in data argument
data
the entries to be set/change in the capture request.
Returns
  • ACAMERA_OK if the method call succeeds.
  • ACAMERA_ERROR_INVALID_PARAMETER if request is NULL, count is larger than zero while data is NULL, the data type of the tag is not unsigned 8 bits, or the tag is not controllable by application.

ACaptureRequest_setUserContext

camera_status_t ACaptureRequest_setUserContext(
  ACaptureRequest *request,
  void *context
)

Associate an arbitrary user context pointer to the ACaptureRequest.

This method is useful for user to identify the capture request in capture session callbacks. The context is NULL for newly created request. ACameraOutputTarget_free will not free the context. Also calling this method twice will not cause the previous context be freed. Also note that calling this method after the request has been sent to capture session will not change the context pointer in the capture callbacks.

Details
Parameters
request
the ACaptureRequest of interest.
context
the user context pointer to be associated with this capture request.
Returns

ACaptureSessionOutputContainer_add

camera_status_t ACaptureSessionOutputContainer_add(
  ACaptureSessionOutputContainer *container,
  const ACaptureSessionOutput *output
)

Add an ACaptureSessionOutput object to ACaptureSessionOutputContainer.

Details
Parameters
container
output
the output ACaptureSessionOutput to be added to container.
Returns

ACaptureSessionOutputContainer_create

camera_status_t ACaptureSessionOutputContainer_create(
  ACaptureSessionOutputContainer **container
)

Create a capture session output container.

The container is used in ACameraDevice_createCaptureSession method to create a capture session. Use ACaptureSessionOutputContainer_free to free the container and its memory after application no longer needs the ACaptureSessionOutputContainer.

Details
Parameters
container
the output ACaptureSessionOutputContainer will be stored here if the method call succeeds.
Returns

ACaptureSessionOutputContainer_free

void ACaptureSessionOutputContainer_free(
  ACaptureSessionOutputContainer *container
)

Free a capture session output container.

See also: ACaptureSessionOutputContainer_create

Details
Parameters
container

ACaptureSessionOutputContainer_remove

camera_status_t ACaptureSessionOutputContainer_remove(
  ACaptureSessionOutputContainer *container,
  const ACaptureSessionOutput *output
)

Remove an ACaptureSessionOutput object from ACaptureSessionOutputContainer.

This method has no effect if the ACaptureSessionOutput does not exist in ACaptureSessionOutputContainer.

Details
Parameters
container
output
the output ACaptureSessionOutput to be removed from container.
Returns

ACaptureSessionOutput_create

camera_status_t ACaptureSessionOutput_create(
  ANativeWindow *anw,
  ACaptureSessionOutput **output
)

Create a ACaptureSessionOutput object.

The ACaptureSessionOutput is used in ACaptureSessionOutputContainer_add method to add an output ANativeWindow to ACaptureSessionOutputContainer. Use ACaptureSessionOutput_free to free the object and its memory after application no longer needs the ACaptureSessionOutput.

See also: ACaptureSessionOutputContainer_add

Details
Parameters
anw
the ANativeWindow to be associated with the ACaptureSessionOutput
output
the output ACaptureSessionOutput will be stored here if the method call succeeds.
Returns

ACaptureSessionOutput_free

void ACaptureSessionOutput_free(
  ACaptureSessionOutput *output
)

Free a ACaptureSessionOutput object.

See also: ACaptureSessionOutput_create

Details
Parameters
output
the ACaptureSessionOutput to be freed.

ACaptureSessionSharedOutput_add

camera_status_t ACaptureSessionSharedOutput_add(
  ACaptureSessionOutput *output,
  ANativeWindow *anw
)

Add a native window to shared ACaptureSessionOutput.

The ACaptureSessionOutput must be created via ACaptureSessionSharedOutput_create.

Details
Parameters
output
the shared ACaptureSessionOutput to be extended.
anw
The new native window.
Returns

ACaptureSessionSharedOutput_create

camera_status_t ACaptureSessionSharedOutput_create(
  ANativeWindow *anw,
  ACaptureSessionOutput **output
)

Create a shared ACaptureSessionOutput object.

The ACaptureSessionOutput is used in ACaptureSessionOutputContainer_add method to add an output ANativeWindow to ACaptureSessionOutputContainer. Use ACaptureSessionOutput_free to free the object and its memory after application no longer needs the ACaptureSessionOutput. A shared ACaptureSessionOutput can be further modified via ACaptureSessionSharedOutput_add or ACaptureSessionSharedOutput_remove and must be updated via ACameraCaptureSession_updateSharedOutput.

See also: ACaptureSessionOutputContainer_add

Details
Parameters
anw
the ANativeWindow to be associated with the ACaptureSessionOutput
output
the output ACaptureSessionOutput will be stored here if the method call succeeds.
Returns

ACaptureSessionSharedOutput_remove

camera_status_t ACaptureSessionSharedOutput_remove(
  ACaptureSessionOutput *output,
  ANativeWindow *anw
)

Remove a native window from shared ACaptureSessionOutput.

Details
Parameters
output
the ACaptureSessionOutput to be modified.
anw
The native window to be removed.
Returns