content/renderer/media/media_stream_audio_sink_owner.h

   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_MEDIA_STREAM_AUDIO_SINK_OWNER_H_
   6 #define CONTENT_RENDERER_MEDIA_MEDIA_STREAM_AUDIO_SINK_OWNER_H_
   7
   8 #include <vector>
   9
  10 #include "base/synchronization/lock.h"
  11 #include "content/renderer/media/media_stream_audio_track_sink.h"
  12
  13 namespace content {
  14
  15 class MediaStreamAudioSink;
  16
  17 // Reference counted holder of MediaStreamAudioSink sinks.
  18 class MediaStreamAudioSinkOwner : public MediaStreamAudioTrackSink {
  19  public:
  20   explicit MediaStreamAudioSinkOwner(MediaStreamAudioSink* sink);
  21
  22   // MediaStreamAudioTrackSink implementation.
  23   virtual int OnData(const int16* audio_data,
  24                      int sample_rate,
  25                      int number_of_channels,
  26                      int number_of_frames,
  27                      const std::vector<int>& channels,
  28                      int audio_delay_milliseconds,
  29                      int current_volume,
  30                      bool need_audio_processing,
  31                      bool key_pressed) OVERRIDE;
  32   virtual void OnSetFormat(const media::AudioParameters& params) OVERRIDE;
  33   virtual void OnReadyStateChanged(
  34       blink::WebMediaStreamSource::ReadyState state) OVERRIDE;
  35   virtual void Reset() OVERRIDE;
  36   virtual bool IsEqual(const MediaStreamAudioSink* other) const OVERRIDE;
  37   virtual bool IsEqual(const PeerConnectionAudioSink* other) const OVERRIDE;
  38
  39  protected:
  40   virtual ~MediaStreamAudioSinkOwner() {}
  41
  42  private:
  43   mutable base::Lock lock_;
  44
  45   // Raw pointer to the delegate, the client need to call Reset() to set the
  46   // pointer to NULL before the delegate goes away.
  47   MediaStreamAudioSink* delegate_;
  48
  49   DISALLOW_COPY_AND_ASSIGN(MediaStreamAudioSinkOwner);
  50 };
  51
  52 }  // namespace content
  53
  54 #endif  // CONTENT_RENDERER_MEDIA_MEDIA_STREAM_AUDIO_SINK_OWNER_H_