Add support for RGB frames in MediaCodecVideoEncoder.

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

 /*
  *  Copyright 2013 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 598 matching lines @@
       long presentationTimestampUs = TimeUnit.NANOSECONDS.toMicros(frame.getTimestampNs());
       checkKeyFrameRequired(isKeyframe, presentationTimestampUs);
 
       VideoFrame.Buffer buffer = frame.getBuffer();
       if (buffer instanceof VideoFrame.TextureBuffer) {
         VideoFrame.TextureBuffer textureBuffer = (VideoFrame.TextureBuffer) buffer;
         eglBase.makeCurrent();
         // TODO(perkj): glClear() shouldn't be necessary since every pixel is covered anyway,
         // but it's a workaround for bug webrtc:5147.
         GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT);
-        drawer.drawOes(textureBuffer.getTextureId(),
-            RendererCommon.convertMatrixFromAndroidGraphicsMatrix(
-                textureBuffer.getTransformMatrix()),
-            width, height, 0, 0, width, height);
+        drawer.drawTexture(textureBuffer, new Matrix(), width, height, 0 /* viewportX */,

[magjed_webrtc, 2017/08/25 13:15:43]

Comment /* renderMatrix */. Also, we should probably comment in the interface
how this works because it was confusing to me.

[sakal, 2017/08/28 08:06:29]

Done.

+            0 /* viewportY */, width, height);
         eglBase.swapBuffers(frame.getTimestampNs());
       } else {
         VideoFrame.I420Buffer i420Buffer = buffer.toI420();
         nativeFillBuffer(nativeEncoder, bufferIndex, i420Buffer.getDataY(), i420Buffer.getStrideY(),
             i420Buffer.getDataU(), i420Buffer.getStrideU(), i420Buffer.getDataV(),
             i420Buffer.getStrideV());
         i420Buffer.release();
         // I420 consists of one full-resolution and two half-resolution planes.
         // 1 + 1 / 4 + 1 / 4 = 3 / 2
         int yuvSize = width * height * 3 / 2;
@@ skipping 287 matching lines @@
     } catch (IllegalStateException e) {
       Logging.e(TAG, "releaseOutputBuffer failed", e);
       return false;
     }
   }
 
   /** Fills an inputBuffer with the given index with data from the byte buffers. */
   private static native void nativeFillBuffer(long nativeEncoder, int inputBuffer, ByteBuffer dataY,
       int strideY, ByteBuffer dataU, int strideU, ByteBuffer dataV, int strideV);
 }