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Effect: Clarify OpenGL configuration.

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This information may be needed for applications to create their own OpenGL contexts
and textures passed into or interacting with Effects.

PiperOrigin-RevId: 504342258
This commit is contained in:
huangdarwin 2023-01-24 20:13:31 +00:00 committed by christosts
parent f86948f01c
commit 4c9538bd4c
1 changed files with 10 additions and 0 deletions
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10
library/effect/src/main/java/com/google/android/exoplayer2/effect/GlEffectsFrameProcessor.java
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@ -24,6 +24,8 @@ import android.content.Context;
import android.graphics.SurfaceTexture;
import android.opengl.EGLContext;
import android.opengl.EGLDisplay;
import android.opengl.GLES20;
import android.opengl.GLES30;
import android.view.Surface;
import androidx.annotation.Nullable;
import androidx.annotation.VisibleForTesting;
@ -73,6 +75,14 @@ public final class GlEffectsFrameProcessor implements FrameProcessor {
* outputColorInfo}'s {@link ColorInfo#colorRange} values are currently ignored, in favor of
* {@code null} and {@link C#COLOR_RANGE_FULL}, respectively.
*
* <p>The OpenGL context will use OpenGL version {@code 3}, and textures will be {@link
* GLES30#GL_RGBA16F} and {@link GLES30#GL_HALF_FLOAT} if {@code inputColorInfo} or {@code
* outputColorInfo} {@linkplain ColorInfo#isTransferHdr} are HDR}, and OpenGL version {@code 2}
* with {@link GLES20#GL_RGBA} and {@link GLES20#GL_UNSIGNED_BYTE} otherwise. It will be
* configured with {@link GlUtil#EGL_CONFIG_ATTRIBUTES_RGBA_1010102} if {@code outputColorInfo}
* {@linkplain ColorInfo#isTransferHdr is HDR}, and {@link
* GlUtil#EGL_CONFIG_ATTRIBUTES_RGBA_8888} otherwise.
*
* <p>Pass a {@link MoreExecutors#directExecutor() direct listenerExecutor} if invoking the
* {@code listener} on {@link GlEffectsFrameProcessor}'s internal thread is desired.
*/