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 AudioDestinationMac_h 30#define AudioDestinationMac_h 31 32#include "AudioBus.h" 33#include "AudioDestination.h" 34#include <AudioUnit/AudioUnit.h> 35#include <wtf/OwnPtr.h> 36#include <wtf/RefPtr.h> 37 38namespace WebCore { 39 40class AudioSessionManagerToken; 41 42// An AudioDestination using CoreAudio's default output AudioUnit 43 44class AudioDestinationMac : public AudioDestination { 45public: 46 AudioDestinationMac(AudioIOCallback&, float sampleRate); 47 virtual ~AudioDestinationMac(); 48 49 virtual void start(); 50 virtual void stop(); 51 bool isPlaying() { return m_isPlaying; } 52 53 float sampleRate() const { return m_sampleRate; } 54 55private: 56 void configure(); 57 58 // DefaultOutputUnit callback 59 static OSStatus inputProc(void* userData, AudioUnitRenderActionFlags*, const AudioTimeStamp*, UInt32 busNumber, UInt32 numberOfFrames, AudioBufferList* ioData); 60 61 OSStatus render(UInt32 numberOfFrames, AudioBufferList* ioData); 62 63 AudioUnit m_outputUnit; 64 AudioIOCallback& m_callback; 65 RefPtr<AudioBus> m_renderBus; 66 67 float m_sampleRate; 68 bool m_isPlaying; 69 70#if USE(AUDIO_SESSION) 71 OwnPtr<AudioSessionManagerToken> m_audioSessionManagerToken; 72#endif 73}; 74 75} // namespace WebCore 76 77#endif // AudioDestinationMac_h 78