Add support for RGB frames in MediaCodecVideoEncoder.

webrtc/sdk/android/api/org/webrtc/RendererCommon.java

 /*
  *  Copyright 2015 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 30 matching lines @@
      * implied by the current EGL context of the calling thread and requires no explicit argument.
      * The coordinates specify the viewport location on the surface target.
      */
     void drawOes(int oesTextureId, float[] texMatrix, int frameWidth, int frameHeight,
         int viewportX, int viewportY, int viewportWidth, int viewportHeight);
     void drawRgb(int textureId, float[] texMatrix, int frameWidth, int frameHeight, int viewportX,
         int viewportY, int viewportWidth, int viewportHeight);
     void drawYuv(int[] yuvTextures, float[] texMatrix, int frameWidth, int frameHeight,
         int viewportX, int viewportY, int viewportWidth, int viewportHeight);
 
+    /**
+     * Draws a VideoFrame.TextureBuffer. Default implementation calls either drawOes or drawRgb
+     * depending on the type of the buffer. You can supply an additional render matrix. This is
+     * used multiplied together with the transformation matrix of the frame. (M = renderMatrix *
+     * transformationMatrix)
+     */
     default void
       drawTexture(VideoFrame.TextureBuffer buffer, android.graphics.Matrix renderMatrix,
           int frameWidth, int frameHeight, int viewportX, int viewportY, int viewportWidth,
           int viewportHeight) {
         android.graphics.Matrix finalMatrix =
             new android.graphics.Matrix(buffer.getTransformMatrix());
         finalMatrix.preConcat(renderMatrix);
         float[] finalGlMatrix = convertMatrixFromAndroidGraphicsMatrix(finalMatrix);
         switch (buffer.getType()) {
           case OES:
@@ skipping 322 matching lines @@
       return new Point(maxDisplayWidth, maxDisplayHeight);
     }
     // Each dimension is constrained on max display size and how much we are allowed to crop.
     final int width = Math.min(
         maxDisplayWidth, Math.round(maxDisplayHeight / minVisibleFraction * videoAspectRatio));
     final int height = Math.min(
         maxDisplayHeight, Math.round(maxDisplayWidth / minVisibleFraction / videoAspectRatio));
     return new Point(width, height);
   }
 }