Separate DemuxerStream and VideoDecoder.

media/filters/vpx_video_decoder.h

 // Copyright (c) 2012 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_FILTERS_VPX_VIDEO_DECODER_H_
 #define MEDIA_FILTERS_VPX_VIDEO_DECODER_H_
 
 #include "base/callback.h"
 #include "base/memory/weak_ptr.h"
 #include "media/base/demuxer_stream.h"
 #include "media/base/video_decoder.h"
+#include "media/base/video_decoder_config.h"
 #include "media/base/video_frame.h"
 
 struct vpx_codec_ctx;
 struct vpx_image;
 
 namespace base {
 class MessageLoopProxy;
 }
 
 namespace media {
 
 // Libvpx video decoder wrapper.
 // Note: VpxVideoDecoder accepts only YV12A VP8 content or VP9 content. This is
 // done to avoid usurping FFmpeg for all vp8 decoding, because the FFmpeg VP8
 // decoder is faster than the libvpx VP8 decoder.
 class MEDIA_EXPORT VpxVideoDecoder : public VideoDecoder {
  public:
   explicit VpxVideoDecoder(
       const scoped_refptr<base::MessageLoopProxy>& message_loop);
   virtual ~VpxVideoDecoder();
 
   // VideoDecoder implementation.
-  virtual void Initialize(DemuxerStream* stream,
+  virtual void Initialize(const VideoDecoderConfig& config,
                           const PipelineStatusCB& status_cb,
                           const StatisticsCB& statistics_cb) OVERRIDE;
-  virtual void Read(const ReadCB& read_cb) OVERRIDE;
+  virtual void Decode(const scoped_refptr<DecoderBuffer>& buffer,
+                      const ReadCB& read_cb) OVERRIDE;
   virtual void Reset(const base::Closure& closure) OVERRIDE;
   virtual void Stop(const base::Closure& closure) OVERRIDE;
   virtual bool HasAlpha() const OVERRIDE;
 
  private:
   enum DecoderState {
     kUninitialized,
     kNormal,
     kFlushCodec,
     kDecodeFinished,
     kError
   };
 
   // Handles (re-)initializing the decoder with a (new) config.
   // Returns true when initialization was successful.
-  bool ConfigureDecoder();
+  bool ConfigureDecoder(const VideoDecoderConfig& config);
 
   void CloseDecoder();
-  void ReadFromDemuxerStream();
-
-  // Carries out the buffer processing operation scheduled by
-  // DecryptOrDecodeBuffer().
-  void DoDecryptOrDecodeBuffer(DemuxerStream::Status status,
-                               const scoped_refptr<DecoderBuffer>& buffer);
 
   void DecodeBuffer(const scoped_refptr<DecoderBuffer>& buffer);
-  bool Decode(const scoped_refptr<DecoderBuffer>& buffer,
-              scoped_refptr<VideoFrame>* video_frame);
+  bool VpxDecode(const scoped_refptr<DecoderBuffer>& buffer,
+                 scoped_refptr<VideoFrame>* video_frame);
 
   // Reset decoder and call |reset_cb_|.
   void DoReset();
 
   void CopyVpxImageTo(const vpx_image* vpx_image,
                       const struct vpx_image* vpx_image_alpha,
                       scoped_refptr<VideoFrame>* video_frame);
 
   scoped_refptr<base::MessageLoopProxy> message_loop_;
   base::WeakPtrFactory<VpxVideoDecoder> weak_factory_;
   base::WeakPtr<VpxVideoDecoder> weak_this_;
 
   DecoderState state_;
 
   StatisticsCB statistics_cb_;
   ReadCB read_cb_;
   base::Closure reset_cb_;
 
-  // Pointer to the demuxer stream that will feed us compressed buffers.
-  DemuxerStream* demuxer_stream_;
+  VideoDecoderConfig config_;
 
   vpx_codec_ctx* vpx_codec_;
   vpx_codec_ctx* vpx_codec_alpha_;
 
   DISALLOW_COPY_AND_ASSIGN(VpxVideoDecoder);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_VPX_VIDEO_DECODER_H_