1 /* 2 * Copyright (C) 2010 Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of 14 * its contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY 18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY 21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #ifndef AudioDestinationChromium_h 30 #define AudioDestinationChromium_h 31 32 #include "core/platform/audio/AudioBus.h" 33 #include "core/platform/audio/AudioDestination.h" 34 #include "core/platform/audio/AudioIOCallback.h" 35 #include "core/platform/audio/AudioSourceProvider.h" 36 #include "public/platform/WebAudioDevice.h" 37 #include "public/platform/WebVector.h" 38 39 namespace WebCore { 40 41 class AudioFIFO; 42 class AudioPullFIFO; 43 44 // An AudioDestination using Chromium's audio system 45 46 class AudioDestinationChromium : public AudioDestination, public WebKit::WebAudioDevice::RenderCallback, public AudioSourceProvider { 47 public: 48 AudioDestinationChromium(AudioIOCallback&, const String& inputDeviceId, unsigned numberOfInputChannels, unsigned numberOfOutputChannels, float sampleRate); 49 virtual ~AudioDestinationChromium(); 50 51 virtual void start(); 52 virtual void stop(); 53 bool isPlaying() { return m_isPlaying; } 54 55 float sampleRate() const { return m_sampleRate; } 56 57 // WebKit::WebAudioDevice::RenderCallback 58 virtual void render(const WebKit::WebVector<float*>& sourceData, const WebKit::WebVector<float*>& audioData, size_t numberOfFrames); 59 60 // WebCore::AudioSourceProvider 61 virtual void provideInput(AudioBus*, size_t framesToProcess); 62 63 private: 64 AudioIOCallback& m_callback; 65 unsigned m_numberOfOutputChannels; 66 RefPtr<AudioBus> m_inputBus; 67 RefPtr<AudioBus> m_renderBus; 68 float m_sampleRate; 69 bool m_isPlaying; 70 OwnPtr<WebKit::WebAudioDevice> m_audioDevice; 71 size_t m_callbackBufferSize; 72 73 OwnPtr<AudioFIFO> m_inputFifo; 74 OwnPtr<AudioPullFIFO> m_fifo; 75 }; 76 77 } // namespace WebCore 78 79 #endif // AudioDestinationChromium_h 80
