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Mention alpha for matrix transformation background color.

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PiperOrigin-RevId: 453633920
(cherry picked from commit cdb80387828c0087d9c9b96c55f303b978847910)
This commit is contained in:
hschlueter 2022-06-08 09:50:18 +00:00 committed by microkatz
parent dac3878273
commit 8973efd199
5 changed files with 7 additions and 5 deletions
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3
libraries/transformer/src/main/java/androidx/media3/transformer/GlMatrixTransformation.java
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@ -28,7 +28,8 @@ import java.io.IOException;
* axes). Transformed pixels that are moved outside of the normal device coordinate range are * axes). Transformed pixels that are moved outside of the normal device coordinate range are
* clipped. * clipped.
* *
* <p>Output frame pixels outside of the transformed input frame will be black. * <p>Output frame pixels outside of the transformed input frame will be black, with alpha = 0 if
* applicable.
*/ */
@UnstableApi @UnstableApi
public interface GlMatrixTransformation extends GlEffect { public interface GlMatrixTransformation extends GlEffect {

3
libraries/transformer/src/main/java/androidx/media3/transformer/MatrixTransformation.java
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@ -25,7 +25,8 @@ import androidx.media3.common.util.UnstableApi;
* axes). Transformed pixels that are moved outside of the normal device coordinate range are * axes). Transformed pixels that are moved outside of the normal device coordinate range are
* clipped. * clipped.
* *
* <p>Output frame pixels outside of the transformed input frame will be black. * <p>Output frame pixels outside of the transformed input frame will be black, with alpha = 0 if
* applicable.
*/ */
@UnstableApi @UnstableApi
public interface MatrixTransformation extends GlMatrixTransformation { public interface MatrixTransformation extends GlMatrixTransformation {

2
libraries/transformer/src/main/java/androidx/media3/transformer/MatrixTransformationProcessor.java
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@ -37,7 +37,7 @@ import java.util.Arrays;
* Transformed vertices that are moved outside of this range after any of the transformation * Transformed vertices that are moved outside of this range after any of the transformation
* matrices are clipped to the NDC range. * matrices are clipped to the NDC range.
* *
* <p>The background color of the output frame will be black. * <p>The background color of the output frame will be (r=0, g=0, b=0, a=0).
*/ */
@UnstableApi @UnstableApi
@SuppressWarnings("FunctionalInterfaceClash") // b/228192298 @SuppressWarnings("FunctionalInterfaceClash") // b/228192298

2
libraries/transformer/src/main/java/androidx/media3/transformer/Presentation.java
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@ -40,7 +40,7 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
* *
* <p>Cropping or aspect ratio is applied before setting resolution. * <p>Cropping or aspect ratio is applied before setting resolution.
* *
* <p>The background color of the output frame will be black. * <p>The background color of the output frame will be black, with alpha = 0 if applicable.
*/ */
@UnstableApi @UnstableApi
public final class Presentation implements MatrixTransformation { public final class Presentation implements MatrixTransformation {

2
libraries/transformer/src/main/java/androidx/media3/transformer/ScaleToFitTransformation.java
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@ -32,7 +32,7 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
* <p>All input frames' pixels will be preserved and copied into an output frame, potentially * <p>All input frames' pixels will be preserved and copied into an output frame, potentially
* changing the width and height of the frame by scaling dimensions to fit. * changing the width and height of the frame by scaling dimensions to fit.
* *
* <p>The background color of the output frame will be black. * <p>The background color of the output frame will be black, with alpha = 0 if applicable.
*/ */
@UnstableApi @UnstableApi
public final class ScaleToFitTransformation implements MatrixTransformation { public final class ScaleToFitTransformation implements MatrixTransformation {