/* * Copyright (C) 2010 Google Inc. All rights reserved. * Copyright (C) 2011, 2014 Apple Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of Apple Inc. ("Apple") nor the names of * its contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #pragma once #if PLATFORM(IOS_FAMILY) #include "AudioBus.h" #include "AudioDestination.h" #include <AudioUnit/AudioUnit.h> #include <wtf/RefPtr.h> namespace WebCore { // An AudioDestination using CoreAudio's default output AudioUnit class AudioDestinationIOS final : public AudioDestination { public: AudioDestinationIOS(AudioIOCallback&, double sampleRate); virtual ~AudioDestinationIOS(); private: void configure(); // AudioDestination void start() override; void stop() override; bool isPlaying() override { return m_isPlaying; } float sampleRate() const override { return m_sampleRate; } // DefaultOutputUnit callback static OSStatus inputProc(void* userData, AudioUnitRenderActionFlags*, const AudioTimeStamp*, UInt32 busNumber, UInt32 numberOfFrames, AudioBufferList* ioData); static void frameSizeChangedProc(void *inRefCon, AudioUnit inUnit, AudioUnitPropertyID inID, AudioUnitScope inScope, AudioUnitElement inElement); friend float AudioDestination::hardwareSampleRate(); OSStatus render(UInt32 numberOfFrames, AudioBufferList* ioData); void setIsPlaying(bool); AudioUnit m_outputUnit; AudioIOCallback& m_callback; RefPtr<AudioBus> m_renderBus; RefPtr<AudioBus> m_spareBus; unsigned m_startSpareFrame { 0 }; unsigned m_endSpareFrame { 0 }; double m_sampleRate; bool m_isPlaying; }; } // namespace WebCore #endif // PLATFORM(IOS_FAMILY)