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Camera: Update API doc for DISPLAY_SYNC timestamp base

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Now the SurfaceView timestamp override only happens in fixed frame rate
case.

Test: Build
Bug: 239775097
Change-Id: I02cf36ed664a446ba3e8f6f04ce42caafaa5ae90
This commit is contained in:
Shuzhen Wang
2022-09-26 13:46:46 -07:00
parent c5637910b8
commit 42efa76749
1 changed files with 5 additions and 3 deletions
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8
core/java/android/hardware/camera2/params/OutputConfiguration.java
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@@ -159,8 +159,9 @@ public final class OutputConfiguration implements Parcelable {
*
* <li> For a SurfaceView output surface, the timestamp base is {@link
* #TIMESTAMP_BASE_CHOREOGRAPHER_SYNCED}. The timestamp is overridden with choreographer
* pulses from the display subsystem for smoother display of camera frames. The timestamp
* is roughly in the same time base as {@link android.os.SystemClock#uptimeMillis}.</li>
* pulses from the display subsystem for smoother display of camera frames when the camera
* device runs in fixed frame rate. The timestamp is roughly in the same time base as
* {@link android.os.SystemClock#uptimeMillis}.</li>
* <li> For an output surface of MediaRecorder, MediaCodec, or ImageReader with {@link
* android.hardware.HardwareBuffer#USAGE_VIDEO_ENCODE} usge flag, the timestamp base is
* {@link #TIMESTAMP_BASE_MONOTONIC}, which is roughly the same time base as
@@ -231,7 +232,8 @@ public final class OutputConfiguration implements Parcelable {
*
* <p>The timestamp of the output images are overridden with choreographer pulses from the
* display subsystem for smoother display of camera frames. An output target of SurfaceView
* uses this time base by default.</p>
* uses this time base by default. Note that the timestamp override is done for fixed camera
* frame rate only.</p>
*
* <p>This timestamp base isn't applicable to SurfaceTexture targets. SurfaceTexture's
* {@link android.graphics.SurfaceTexture#updateTexImage updateTexImage} function always