Cast: Forcing codec initialization on a designated thread

media/cast/video_receiver/codecs/vp8/vp8_decoder.h

 // 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.
 
 #ifndef MEDIA_CAST_RTP_RECEVIER_CODECS_VP8_VP8_DECODER_H_
 #define MEDIA_CAST_RTP_RECEVIER_CODECS_VP8_VP8_DECODER_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "base/threading/non_thread_safe.h"
 #include "media/cast/cast_config.h"
 #include "media/cast/cast_environment.h"
 #include "media/cast/cast_receiver.h"
 #include "third_party/libvpx/source/libvpx/vpx/vpx_decoder.h"
 
 typedef struct vpx_codec_ctx vpx_dec_ctx_t;
 
 namespace media {
 namespace cast {
 
 // This class is not thread safe; it's only called from the cast video decoder
 // thread.
 class Vp8Decoder : public base::NonThreadSafe {
  public:
-  Vp8Decoder(int number_of_cores,
-             scoped_refptr<CastEnvironment> cast_environment);
+  explicit Vp8Decoder(scoped_refptr<CastEnvironment> cast_environment);
   ~Vp8Decoder();
 
   // Decode frame - The decoded frame will be passed via the callback.
   // Will return false in case of error, and then it's up to the caller to
   // release the memory.
   // Ownership of the encoded_frame does not pass to the Vp8Decoder.
   bool Decode(const EncodedVideoFrame* encoded_frame,
               const base::TimeTicks render_time,
               const VideoFrameDecodedCallback& frame_decoded_cb);
 
  private:
   // Initialize the decoder.
-  void InitDecode(int number_of_cores);
-
+  void InitDecoder();
   scoped_ptr<vpx_dec_ctx_t> decoder_;
   scoped_refptr<CastEnvironment> cast_environment_;
 };
 
 }  // namespace cast
 }  // namespace media
 
 #endif  // MEDIA_CAST_RTP_RECEVIER_CODECS_VP8_VP8_DECODER_H_