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 36 namespace WebCore { 37 38 // An AudioDestination using CoreAudio's default output AudioUnit 39 40 class AudioDestinationMac : public AudioDestination { 41 public: 42 AudioDestinationMac(AudioSourceProvider&, double sampleRate); 43 virtual ~AudioDestinationMac(); 44 45 virtual void start(); 46 virtual void stop(); isPlaying()47 bool isPlaying() { return m_isPlaying; } 48 sampleRate()49 double sampleRate() const { return m_sampleRate; } 50 51 private: 52 void configure(); 53 54 // DefaultOutputUnit callback 55 static OSStatus inputProc(void* userData, AudioUnitRenderActionFlags*, const AudioTimeStamp*, UInt32 busNumber, UInt32 numberOfFrames, AudioBufferList* ioData); 56 57 OSStatus render(UInt32 numberOfFrames, AudioBufferList* ioData); 58 59 AudioUnit m_outputUnit; 60 AudioSourceProvider& m_provider; 61 AudioBus m_renderBus; 62 63 double m_sampleRate; 64 bool m_isPlaying; 65 }; 66 67 } // namespace WebCore 68 69 #endif // AudioDestinationMac_h 70