content/renderer/media/media_stream_audio_track_sink.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_TRACK_SINK_H_
   6 #define CONTENT_RENDERER_MEDIA_MEDIA_STREAM_AUDIO_TRACK_SINK_H_
   7
   8 #include <vector>
   9
  10 #include "base/logging.h"
  11 #include "base/memory/ref_counted.h"
  12 #include "base/time/time.h"
  13 #include "media/audio/audio_parameters.h"
  14 #include "third_party/WebKit/public/platform/WebMediaStreamSource.h"
  15
  16 namespace media {
  17 class AudioBus;
  18 }
  19
  20 namespace content {
  21
  22 class MediaStreamAudioSink;
  23
  24 // Interface for reference counted holder of audio stream audio track sink.
  25 class MediaStreamAudioTrackSink
  26     : public base::RefCountedThreadSafe<MediaStreamAudioTrackSink> {
  27  public:
  28   // Note: OnData() and OnSetFormat() have the same meaning and semantics as in
  29   // content::MediaStreamAudioSink.  See comments there for usage info.
  30   virtual void OnData(const media::AudioBus& audio_bus,
  31                       base::TimeTicks estimated_capture_time) = 0;
  32   virtual void OnSetFormat(const media::AudioParameters& params) = 0;
  33
  34   virtual void OnReadyStateChanged(
  35       blink::WebMediaStreamSource::ReadyState state) = 0;
  36
  37   virtual void Reset() = 0;
  38
  39   virtual bool IsEqual(const MediaStreamAudioSink* other) const = 0;
  40
  41   // Wrapper which allows to use std::find_if() when adding and removing
  42   // sinks to/from the list.
  43   struct WrapsMediaStreamSink {
  44     WrapsMediaStreamSink(MediaStreamAudioSink* sink) : sink_(sink) {}
  45     bool operator()(
  46         const scoped_refptr<MediaStreamAudioTrackSink>& owner) const {
  47       return owner->IsEqual(sink_);
  48     }
  49     MediaStreamAudioSink* sink_;
  50   };
  51
  52  protected:
  53   virtual ~MediaStreamAudioTrackSink() {}
  54
  55  private:
  56   friend class base::RefCountedThreadSafe<MediaStreamAudioTrackSink>;
  57 };
  58
  59 }  // namespace content
  60
  61 #endif  // CONTENT_RENDERER_MEDIA_MEDIA_STREAM_AUDIO_TRACK_SINK_H_