From b814404c561adada85cec366d1ca8f38d7ad25b9 Mon Sep 17 00:00:00 2001
From: huangdarwin <huangdarwin@google.com>
Date: Thu, 17 Aug 2023 14:32:07 +0100
Subject: [PATCH] Effect: Update rgba matrix reference to rgb.

The 4x4 matrix only updates the RGB channels, so it should be referred to as an rgb matrix, not an rgba matrix.

PiperOrigin-RevId: 557804613
---
 .../java/androidx/media3/effect/DefaultShaderProgram.java     | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libraries/effect/src/main/java/androidx/media3/effect/DefaultShaderProgram.java b/libraries/effect/src/main/java/androidx/media3/effect/DefaultShaderProgram.java
index bd182a9f3d..1ec8192eec 100644
--- a/libraries/effect/src/main/java/androidx/media3/effect/DefaultShaderProgram.java
+++ b/libraries/effect/src/main/java/androidx/media3/effect/DefaultShaderProgram.java
@@ -460,7 +460,7 @@ import java.util.List;
   @Override
   public void drawFrame(int inputTexId, long presentationTimeUs)
       throws VideoFrameProcessingException {
-    updateCompositeRgbaMatrixArray(presentationTimeUs);
+    updateCompositeRgbMatrixArray(presentationTimeUs);
     updateCompositeTransformationMatrixAndVisiblePolygon(presentationTimeUs);
     if (visiblePolygon.size() < 3) {
       return; // Need at least three visible vertices for a triangle.
@@ -562,7 +562,7 @@ import java.util.List;
   }
 
   /** Updates {@link #compositeRgbMatrixArray} based on the given frame timestamp. */
-  private void updateCompositeRgbaMatrixArray(long presentationTimeUs) {
+  private void updateCompositeRgbMatrixArray(long presentationTimeUs) {
     float[][] matricesCurrTimestamp = new float[rgbMatrices.size()][16];
     for (int i = 0; i < rgbMatrices.size(); i++) {
       matricesCurrTimestamp[i] = rgbMatrices.get(i).getMatrix(presentationTimeUs, useHdr);