Cast: Forcing codec initialization on a designated thread

media/cast/video_receiver/video_decoder.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "media/cast/video_receiver/video_decoder.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/message_loop/message_loop.h"
 #include "media/cast/video_receiver/codecs/vp8/vp8_decoder.h"
 
 namespace media {
 namespace cast {
 
 VideoDecoder::VideoDecoder(const VideoReceiverConfig& video_config,
                            scoped_refptr<CastEnvironment> cast_environment)
     : codec_(video_config.codec),
       vp8_decoder_() {
   switch (video_config.codec) {
     case kVp8:
-      // Initializing to use one core.
-      vp8_decoder_.reset(new Vp8Decoder(1, cast_environment));
+      vp8_decoder_.reset(new Vp8Decoder(cast_environment));
       break;
     case kH264:
       NOTIMPLEMENTED();
       break;
     case kExternalVideo:
       DCHECK(false) << "Invalid codec";
       break;
   }
 }
 
 VideoDecoder::~VideoDecoder() {}
 
+void VideoDecoder::InitDecoder() {
+  // Initializing to use one core.
+  vp8_decoder_->InitDecoder();
+}
+
 bool VideoDecoder::DecodeVideoFrame(const EncodedVideoFrame* encoded_frame,
                                     const base::TimeTicks render_time,
                                     const VideoFrameDecodedCallback&
                                     frame_decoded_cb) {
   DCHECK(encoded_frame->codec == codec_) << "Invalid codec";
   DCHECK_GT(encoded_frame->data.size(), GG_UINT64_C(0)) << "Empty video frame";
   return vp8_decoder_->Decode(encoded_frame, render_time, frame_decoded_cb);
 }
 
 }  // namespace cast
 }  // namespace media