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Transformer GL: Add pixel test instructions for physical devices

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Expected images are taken on emulators, so a larger acceptable
difference from expected images must be accepted on physical devices.

PiperOrigin-RevId: 421543441
This commit is contained in:
huangdarwin 2022-01-13 13:59:02 +00:00 committed by Ian Baker
parent 8d81bd58d8
commit 05924eaa52
1 changed files with 11 additions and 1 deletions
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12
library/transformer/src/androidTest/java/com/google/android/exoplayer2/transformer/FrameEditorDataProcessingTest.java
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@ -42,7 +42,11 @@ import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
/** Test for frame processing via {@link FrameEditor#processData()}. */
/**
* Pixel test for frame processing via {@link FrameEditor#processData()}. Expected images are taken
* from emulators, so tests on physical devices may fail. To test on physical devices, please modify
* the MAXIMUM_AVERAGE_PIXEL_ABSOLUTE_DIFFERENCE.
*/
@RunWith(AndroidJUnit4.class)
public final class FrameEditorDataProcessingTest {
@ -54,6 +58,12 @@ public final class FrameEditorDataProcessingTest {
* test to pass. The value is chosen so that differences in decoder behavior across emulator
* versions shouldn't affect whether the test passes, but substantial distortions introduced by
* changes in the behavior of the frame editor will cause the test to fail.
*
* <p>To run this test on physical devices, please use a value of 5f, rather than 0.1f. This
* higher value will ignore some very small errors, but will allow for some differences caused by
* graphics implementations to be ignored. When the difference is close to the threshold, manually
* inspect expected/actual bitmaps to confirm failure, as it's possible this is caused by a
* difference in the codec or graphics implementation as opposed to a FrameEditor issue.
*/
private static final float MAXIMUM_AVERAGE_PIXEL_ABSOLUTE_DIFFERENCE = 0.1f;
/** Timeout for dequeueing buffers from the codec, in microseconds. */