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 #include "media/audio/fake_audio_output_stream.h" 6 7 #include "base/bind.h" 8 #include "base/bind_helpers.h" 9 #include "base/logging.h" 10 #include "base/message_loop/message_loop.h" 11 #include "media/audio/audio_manager_base.h" 12 13 namespace media { 14 15 // static 16 AudioOutputStream* FakeAudioOutputStream::MakeFakeStream( 17 AudioManagerBase* manager, const AudioParameters& params) { 18 return new FakeAudioOutputStream(manager, params); 19 } 20 21 FakeAudioOutputStream::FakeAudioOutputStream(AudioManagerBase* manager, 22 const AudioParameters& params) 23 : audio_manager_(manager), 24 callback_(NULL), 25 fake_consumer_(manager->GetMessageLoop(), params) { 26 } 27 28 FakeAudioOutputStream::~FakeAudioOutputStream() { 29 DCHECK(!callback_); 30 } 31 32 bool FakeAudioOutputStream::Open() { 33 DCHECK(audio_manager_->GetMessageLoop()->BelongsToCurrentThread()); 34 return true; 35 } 36 37 void FakeAudioOutputStream::Start(AudioSourceCallback* callback) { 38 DCHECK(audio_manager_->GetMessageLoop()->BelongsToCurrentThread()); 39 callback_ = callback; 40 fake_consumer_.Start(base::Bind( 41 &FakeAudioOutputStream::CallOnMoreData, base::Unretained(this))); 42 } 43 44 void FakeAudioOutputStream::Stop() { 45 DCHECK(audio_manager_->GetMessageLoop()->BelongsToCurrentThread()); 46 fake_consumer_.Stop(); 47 callback_ = NULL; 48 } 49 50 void FakeAudioOutputStream::Close() { 51 DCHECK(!callback_); 52 DCHECK(audio_manager_->GetMessageLoop()->BelongsToCurrentThread()); 53 audio_manager_->ReleaseOutputStream(this); 54 } 55 56 void FakeAudioOutputStream::SetVolume(double volume) {}; 57 58 void FakeAudioOutputStream::GetVolume(double* volume) { 59 *volume = 0; 60 }; 61 62 void FakeAudioOutputStream::CallOnMoreData(AudioBus* audio_bus) { 63 DCHECK(audio_manager_->GetMessageLoop()->BelongsToCurrentThread()); 64 callback_->OnMoreData(audio_bus, AudioBuffersState()); 65 } 66 67 } // namespace media 68