Revert of Move MutableDataY{,U,V} methods to I420Buffer only.

webrtc/modules/video_coding/codecs/i420/i420.cc

 /*
  *  Copyright (c) 2012 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 119 matching lines @@
   return buffer;
 }
 
 int I420Encoder::RegisterEncodeCompleteCallback(
     EncodedImageCallback* callback) {
   _encodedCompleteCallback = callback;
   return WEBRTC_VIDEO_CODEC_OK;
 }
 
 I420Decoder::I420Decoder()
-    : _width(0),
+    : _decodedImage(),
+      _width(0),
       _height(0),
       _inited(false),
       _decodeCompleteCallback(NULL) {}
 
 I420Decoder::~I420Decoder() {
   Release();
 }
 
 int I420Decoder::InitDecode(const VideoCodec* codecSettings,
                             int /*numberOfCores */) {
@@ skipping 40 matching lines @@
   _height = height;
 
   // Verify that the available length is sufficient:
   size_t req_length = CalcBufferSize(kI420, _width, _height) + kI420HeaderSize;
 
   if (req_length > inputImage._length) {
     return WEBRTC_VIDEO_CODEC_ERROR;
   }
   // Set decoded image parameters.
   int half_width = (_width + 1) / 2;
-  rtc::scoped_refptr<webrtc::I420Buffer> frame_buffer =
-      I420Buffer::Create(_width, _height, _width, half_width, half_width);
-
-  // Converting from raw buffer I420Buffer.
+  _decodedImage.CreateEmptyFrame(_width, _height, _width, half_width,
+                                 half_width);
+  // Converting from buffer to plane representation.
   int ret = ConvertToI420(kI420, buffer, 0, 0, _width, _height, 0,
-                          kVideoRotation_0, frame_buffer.get());
+                          kVideoRotation_0, &_decodedImage);
   if (ret < 0) {
     return WEBRTC_VIDEO_CODEC_MEMORY;
   }
+  _decodedImage.set_timestamp(inputImage._timeStamp);
 
-  VideoFrame decoded_image(frame_buffer, inputImage._timeStamp, 0,
-                           webrtc::kVideoRotation_0);
-  _decodeCompleteCallback->Decoded(decoded_image);
+  _decodeCompleteCallback->Decoded(_decodedImage);
   return WEBRTC_VIDEO_CODEC_OK;
 }
 
 const uint8_t* I420Decoder::ExtractHeader(const uint8_t* buffer,
                                           uint16_t* width,
                                           uint16_t* height) {
   *width = static_cast<uint16_t>(*buffer++) << 8;
   *width |= *buffer++;
   *height = static_cast<uint16_t>(*buffer++) << 8;
   *height |= *buffer++;
 
   return buffer;
 }
 
 int I420Decoder::RegisterDecodeCompleteCallback(
     DecodedImageCallback* callback) {
   _decodeCompleteCallback = callback;
   return WEBRTC_VIDEO_CODEC_OK;
 }
 
 int I420Decoder::Release() {
   _inited = false;
   return WEBRTC_VIDEO_CODEC_OK;
 }
 }  // namespace webrtc