Camera2: update docs for reprocess timestamp (6216e4e0) · Commits · e / os / android_frameworks_base

core/java/android/hardware/camera2/CameraCaptureSession.java

+16 −8

Original line number	Diff line number	Diff line
		@@ -654,16 +654,22 @@ public abstract class CameraCaptureSession implements AutoCloseable {

		/**
		* This method is called when the camera device has started capturing
		* the output image for the request, at the beginning of image exposure.
		* the output image for the request, at the beginning of image exposure, or
		* when the camera device has started processing an input image for a reprocess
		* request.
		*
		* <p>This callback is invoked right as the capture of a frame begins,
		* so it is the most appropriate time for playing a shutter sound,
		* or triggering UI indicators of capture.</p>
		* <p>For a regular capture request, this callback is invoked right as
		* the capture of a frame begins, so it is the most appropriate time
		* for playing a shutter sound, or triggering UI indicators of capture.</p>
		*
		* <p>The request that is being used for this capture is provided, along
		* with the actual timestamp for the start of exposure. This timestamp
		* matches the timestamp that will be included in
		* {@link CaptureResult#SENSOR_TIMESTAMP the result timestamp field},
		* with the actual timestamp for the start of exposure. For a reprocess
		* request, this timestamp will be the input image's start of exposure
		* which matches {@link CaptureResult#SENSOR_TIMESTAMP the result timestamp field}
		* of the {@link TotalCaptureResult} that was used to
		* {@link CameraDevice#createReprocessCaptureRequest create the reprocess request}.
		* This timestamp matches the timestamps that will be
		* included in {@link CaptureResult#SENSOR_TIMESTAMP the result timestamp field},
		* and in the buffers sent to each output Surface. These buffer
		* timestamps are accessible through, for example,
		* {@link android.media.Image#getTimestamp() Image.getTimestamp()} or
		@@ -679,7 +685,9 @@ public abstract class CameraCaptureSession implements AutoCloseable {
		*
		* @param session the session returned by {@link CameraDevice#createCaptureSession}
		* @param request the request for the capture that just begun
		* @param timestamp the timestamp at start of capture, in nanoseconds.
		* @param timestamp the timestamp at start of capture for a regular request, or
		* the timestamp at the input image's start of capture for a
		* reprocess request, in nanoseconds.
		* @param frameNumber the frame number for this capture
		*
		* @see android.media.MediaActionSound

core/java/android/hardware/camera2/CaptureResult.java

+4 −0

Original line number	Diff line number	Diff line
		@@ -2988,6 +2988,10 @@ public class CaptureResult extends CameraMetadata<CaptureResult.Key<?>> {
		* timestamps measure time in the same timebase as {@link android.os.SystemClock#elapsedRealtimeNanos }, and they can
		* be compared to other timestamps from other subsystems that
		* are using that base.</p>
		* <p>For reprocessing, the timestamp will match the start of exposure of
		* the input image, i.e. {@link CaptureResult#SENSOR_TIMESTAMP the
		* timestamp} in the TotalCaptureResult that was used to create the
		* reprocess capture request.</p>
		* <p><b>Units</b>: Nanoseconds</p>
		* <p><b>Range of valid values:</b><br>
		* > 0</p>