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_PUBLIC_RENDERER_MEDIA_STREAM_AUDIO_SINK_H_ 6 #define CONTENT_PUBLIC_RENDERER_MEDIA_STREAM_AUDIO_SINK_H_ 7 8 #include <vector> 9 10 #include "base/basictypes.h" 11 #include "content/common/content_export.h" 12 #include "content/public/renderer/media_stream_sink.h" 13 14 namespace blink { 15 class WebMediaStreamTrack; 16 } 17 18 namespace media { 19 class AudioParameters; 20 } 21 22 namespace content { 23 24 class CONTENT_EXPORT MediaStreamAudioSink : public MediaStreamSink { 25 public: 26 // Adds a MediaStreamAudioSink to the audio track to receive audio data from 27 // the track. 28 // Called on the main render thread. 29 static void AddToAudioTrack(MediaStreamAudioSink* sink, 30 const blink::WebMediaStreamTrack& track); 31 32 // Removes a MediaStreamAudioSink from the audio track to stop receiving 33 // audio data from the track. 34 // Called on the main render thread. 35 static void RemoveFromAudioTrack(MediaStreamAudioSink* sink, 36 const blink::WebMediaStreamTrack& track); 37 38 // Callback on delivering the interleaved audio data. 39 // |audio_data| is the pointer to the audio data. 40 // |sample_rate| is the sample frequency of |audio_data|. 41 // |number_of_channels| is the number of audio channels of |audio_data|. 42 // |number_of_frames| is the number of audio frames in the |audio_data|. 43 // Called on real-time audio thread. 44 virtual void OnData(const int16* audio_data, 45 int sample_rate, 46 int number_of_channels, 47 int number_of_frames) = 0; 48 49 // Callback called when the format of the audio stream has changed. 50 // This is called on the same thread as OnData(). 51 virtual void OnSetFormat(const media::AudioParameters& params) = 0; 52 53 protected: ~MediaStreamAudioSink()54 virtual ~MediaStreamAudioSink() {} 55 }; 56 57 } // namespace content 58 59 #endif // CONTENT_PUBLIC_RENDERER_MEDIA_STREAM_AUDIO_SINK_H_ 60