Remove reference counting from media::Demuxer and friends.

media/filters/ffmpeg_demuxer.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.
 
 // Implements the Demuxer interface using FFmpeg's libavformat.  At this time
 // will support demuxing any audio/video format thrown at it.  The streams
 // output mime types audio/x-ffmpeg and video/x-ffmpeg and include an integer
 // key FFmpegCodecID which contains the CodecID enumeration value.  The CodecIDs
 // can be used to create and initialize the corresponding FFmpeg decoder.
 //
@@ skipping 101 matching lines @@
   static base::TimeDelta ConvertStreamTimestamp(const AVRational& time_base,
                                                 int64 timestamp);
 
   FFmpegDemuxer* demuxer_;
   scoped_refptr<base::MessageLoopProxy> message_loop_;
   AVStream* stream_;
   AudioDecoderConfig audio_config_;
   VideoDecoderConfig video_config_;
   Type type_;
   base::TimeDelta duration_;
-  bool stopped_;
   bool end_of_stream_;
   base::TimeDelta last_packet_timestamp_;
   Ranges<base::TimeDelta> buffered_ranges_;
 
   DecoderBufferQueue buffer_queue_;
   ReadCB read_cb_;
 
   scoped_ptr<FFmpegH264ToAnnexBBitstreamConverter> bitstream_converter_;
   bool bitstream_converter_enabled_;
 
   std::string encryption_key_id_;
 
   DISALLOW_COPY_AND_ASSIGN(FFmpegDemuxerStream);
 };
 
 class MEDIA_EXPORT FFmpegDemuxer : public Demuxer {
  public:
   FFmpegDemuxer(const scoped_refptr<base::MessageLoopProxy>& message_loop,
                 const scoped_refptr<DataSource>& data_source,
                 const FFmpegNeedKeyCB& need_key_cb);
+  virtual ~FFmpegDemuxer();
 
   // Demuxer implementation.
   virtual void Initialize(DemuxerHost* host,
                           const PipelineStatusCB& status_cb) OVERRIDE;
   virtual void Stop(const base::Closure& callback) OVERRIDE;
   virtual void Seek(base::TimeDelta time, const PipelineStatusCB& cb) OVERRIDE;
   virtual void OnAudioRendererDisabled() OVERRIDE;
   virtual void SetPlaybackRate(float playback_rate) OVERRIDE;
   virtual scoped_refptr<DemuxerStream> GetStream(
       DemuxerStream::Type type) OVERRIDE;
   virtual base::TimeDelta GetStartTime() const OVERRIDE;
 
   // Calls |need_key_cb_| with the initialization data encountered in the file.
   void FireNeedKey(const std::string& init_data_type,
                    const std::string& encryption_key_id);
 
   // Allow FFmpegDemuxerStream to notify us when there is updated information
   // about capacity and what buffered data is available.
   void NotifyCapacityAvailable();
   void NotifyBufferingChanged();
 
  private:
   // To allow tests access to privates.
   friend class FFmpegDemuxerTest;
 
-  virtual ~FFmpegDemuxer();
-
   // FFmpeg callbacks during initialization.
   void OnOpenContextDone(const PipelineStatusCB& status_cb, bool result);
   void OnFindStreamInfoDone(const PipelineStatusCB& status_cb, int result);
 
   // FFmpeg callbacks during seeking.
   void OnSeekFrameDone(const PipelineStatusCB& cb, int result);
 
   // FFmpeg callbacks during reading + helper method to initiate reads.
   void ReadFrameIfNeeded();
   void OnReadFrameDone(ScopedAVPacket packet, int result);
@@ skipping 12 matching lines @@
   void OnDataSourceError();
 
   // Returns the stream from |streams_| that matches |type| as an
   // FFmpegDemuxerStream.
   scoped_refptr<FFmpegDemuxerStream> GetFFmpegStream(
       DemuxerStream::Type type) const;
 
   DemuxerHost* host_;
 
   scoped_refptr<base::MessageLoopProxy> message_loop_;
+  base::WeakPtrFactory<FFmpegDemuxer> weak_factory_;
+  base::WeakPtr<FFmpegDemuxer> weak_this_;
 
   // Thread on which all blocking FFmpeg operations are executed.
   base::Thread blocking_thread_;
 
   // Tracks if there's an outstanding av_read_frame() operation.
   //
   // TODO(scherkus): Allow more than one read in flight for higher read
   // throughput using demuxer_bench to verify improvements.
   bool pending_read_;
 
@@ skipping 38 matching lines @@
   scoped_ptr<FFmpegGlue> glue_;
 
   const FFmpegNeedKeyCB need_key_cb_;
 
   DISALLOW_COPY_AND_ASSIGN(FFmpegDemuxer);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_FFMPEG_DEMUXER_H_