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      1 // Copyright 2013 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CONTENT_RENDERER_MEDIA_ANDROID_RENDERER_DEMUXER_ANDROID_H_
      6 #define CONTENT_RENDERER_MEDIA_ANDROID_RENDERER_DEMUXER_ANDROID_H_
      7 
      8 #include "base/atomic_sequence_num.h"
      9 #include "base/id_map.h"
     10 #include "ipc/message_filter.h"
     11 #include "media/base/android/demuxer_stream_player_params.h"
     12 
     13 namespace base {
     14 class MessageLoopProxy;
     15 }
     16 
     17 namespace content {
     18 
     19 class MediaSourceDelegate;
     20 class ThreadSafeSender;
     21 
     22 // Represents the renderer process half of an IPC-based implementation of
     23 // media::DemuxerAndroid.
     24 //
     25 // Refer to BrowserDemuxerAndroid for the browser process half.
     26 class RendererDemuxerAndroid : public IPC::MessageFilter {
     27  public:
     28   RendererDemuxerAndroid();
     29 
     30   // Returns the next available demuxer client ID for use in IPC messages.
     31   //
     32   // Safe to call on any thread.
     33   int GetNextDemuxerClientID();
     34 
     35   // Associates |delegate| with |demuxer_client_id| for handling incoming IPC
     36   // messages.
     37   //
     38   // Must be called on media thread.
     39   void AddDelegate(int demuxer_client_id, MediaSourceDelegate* delegate);
     40 
     41   // Removes the association created by AddDelegate().
     42   //
     43   // Must be called on media thread.
     44   void RemoveDelegate(int demuxer_client_id);
     45 
     46   // IPC::MessageFilter overrides.
     47   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
     48 
     49   // media::DemuxerAndroidClient "implementation".
     50   //
     51   // TODO(scherkus): Consider having RendererDemuxerAndroid actually implement
     52   // media::DemuxerAndroidClient and MediaSourceDelegate actually implement
     53   // media::DemuxerAndroid.
     54   void DemuxerReady(int demuxer_client_id,
     55                     const media::DemuxerConfigs& configs);
     56   void ReadFromDemuxerAck(int demuxer_client_id,
     57                           const media::DemuxerData& data);
     58   void DemuxerSeekDone(int demuxer_client_id,
     59                        const base::TimeDelta& actual_browser_seek_time);
     60   void DurationChanged(int demuxer_client_id, const base::TimeDelta& duration);
     61 
     62  protected:
     63   friend class base::RefCountedThreadSafe<RendererDemuxerAndroid>;
     64   virtual ~RendererDemuxerAndroid();
     65 
     66  private:
     67   void DispatchMessage(const IPC::Message& message);
     68   void OnReadFromDemuxer(int demuxer_client_id,
     69                          media::DemuxerStream::Type type);
     70   void OnDemuxerSeekRequest(int demuxer_client_id,
     71                             const base::TimeDelta& time_to_seek,
     72                             bool is_browser_seek);
     73 
     74   base::AtomicSequenceNumber next_demuxer_client_id_;
     75 
     76   IDMap<MediaSourceDelegate> delegates_;
     77   scoped_refptr<ThreadSafeSender> thread_safe_sender_;
     78   scoped_refptr<base::MessageLoopProxy> media_message_loop_;
     79 
     80   DISALLOW_COPY_AND_ASSIGN(RendererDemuxerAndroid);
     81 };
     82 
     83 }  // namespace content
     84 
     85 #endif  // CONTENT_RENDERER_MEDIA_ANDROID_RENDERER_DEMUXER_ANDROID_H_
     86