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Merge "Camera: Update documentation for rolling shutter skew" into rvc-dev am: 1a66adcc56

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Change-Id: I72f3e9710ee7026c132e736019ed2c7b7c9f9e1b
This commit is contained in:
Eino-Ville Talvala
2020-05-14 17:02:42 +00:00
committed by Automerger Merge Worker
parent a75bd55a9b 1a66adcc56
commit f20c895c02
1 changed files with 17 additions and 7 deletions
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24
core/java/android/hardware/camera2/CaptureResult.java
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@@ -3949,14 +3949,24 @@ public class CaptureResult extends CameraMetadata<CaptureResult.Key<?>> {
new Key<Integer>("android.sensor.testPatternMode", int.class);
/**
* <p>Duration between the start of first row exposure
* and the start of last row exposure.</p>
* <p>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
* <p>Duration between the start of exposure for the first row of the image sensor,
* and the start of exposure for one past the last row of the image sensor.</p>
* <p>This is the exposure time skew between the first and <code>(last+1)</code> row exposure start times. The
* first row and the last row are the first and last rows inside of the
* {@link CameraCharacteristics#SENSOR_INFO_ACTIVE_ARRAY_SIZE android.sensor.info.activeArraySize}.</p>
* <p>For typical camera sensors that use rolling shutters, this is also equivalent
* to the frame readout time.</p>
* <p>For typical camera sensors that use rolling shutters, this is also equivalent to the frame
* readout time.</p>
* <p>If the image sensor is operating in a binned or cropped mode due to the current output
* target resolutions, it's possible this skew is reported to be larger than the exposure
* time, for example, since it is based on the full array even if a partial array is read
* out. Be sure to scale the number to cover the section of the sensor actually being used
* for the outputs you care about. So if your output covers N rows of the active array of
* height H, scale this value by N/H to get the total skew for that viewport.</p>
* <p><em>Note:</em> Prior to Android 11, this field was described as measuring duration from
* first to last row of the image sensor, which is not equal to the frame readout time for a
* rolling shutter sensor. Implementations generally reported the latter value, so to resolve
* the inconsistency, the description has been updated to range from (first, last+1) row
* exposure start, instead.</p>
* <p><b>Units</b>: Nanoseconds</p>
* <p><b>Range of valid values:</b><br>
* &gt;= 0 and &lt;