1 // Copyright (c) 2012 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 MEDIA_AUDIO_FAKE_AUDIO_OUTPUT_STREAM_H_ 6 #define MEDIA_AUDIO_FAKE_AUDIO_OUTPUT_STREAM_H_ 7 8 #include "base/memory/scoped_ptr.h" 9 #include "media/audio/audio_io.h" 10 #include "media/audio/audio_parameters.h" 11 #include "media/audio/fake_audio_consumer.h" 12 13 namespace media { 14 15 class AudioManagerBase; 16 17 // A fake implementation of AudioOutputStream. Used for testing and when a real 18 // audio output device is unavailable or refusing output (e.g. remote desktop). 19 // Callbacks are driven on the AudioManager's message loop. 20 class MEDIA_EXPORT FakeAudioOutputStream : public AudioOutputStream { 21 public: 22 static AudioOutputStream* MakeFakeStream(AudioManagerBase* manager, 23 const AudioParameters& params); 24 25 // AudioOutputStream implementation. 26 virtual bool Open() OVERRIDE; 27 virtual void Start(AudioSourceCallback* callback) OVERRIDE; 28 virtual void Stop() OVERRIDE; 29 virtual void SetVolume(double volume) OVERRIDE; 30 virtual void GetVolume(double* volume) OVERRIDE; 31 virtual void Close() OVERRIDE; 32 33 private: 34 FakeAudioOutputStream(AudioManagerBase* manager, 35 const AudioParameters& params); 36 virtual ~FakeAudioOutputStream(); 37 38 // Task that periodically calls OnMoreData() to consume audio data. 39 void CallOnMoreData(AudioBus* audio_bus); 40 41 AudioManagerBase* audio_manager_; 42 AudioSourceCallback* callback_; 43 FakeAudioConsumer fake_consumer_; 44 45 DISALLOW_COPY_AND_ASSIGN(FakeAudioOutputStream); 46 }; 47 48 } // namespace media 49 50 #endif // MEDIA_AUDIO_FAKE_AUDIO_OUTPUT_STREAM_H_ 51
