fake_audio_output_stream.h revision 7d4cd473f85ac64c3747c96c277f9e506a0d2246
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 13namespace media { 14 15class 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. 20class 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