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 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 "MediaSession.h" 35#include <AudioUnit/AudioUnit.h> 36#include <wtf/RefPtr.h> 37 38namespace WebCore { 39 40// An AudioDestination using CoreAudio's default output AudioUnit 41 42class AudioDestinationMac : public AudioDestination, public MediaSessionClient { 43public: 44 AudioDestinationMac(AudioIOCallback&, float sampleRate); 45 virtual ~AudioDestinationMac(); 46 47private: 48 void configure(); 49 50 // DefaultOutputUnit callback 51 static OSStatus inputProc(void* userData, AudioUnitRenderActionFlags*, const AudioTimeStamp*, UInt32 busNumber, UInt32 numberOfFrames, AudioBufferList* ioData); 52 53 OSStatus render(UInt32 numberOfFrames, AudioBufferList* ioData); 54 55 virtual MediaSession::MediaType mediaType() const override { return MediaSession::WebAudio; } 56 virtual MediaSession::MediaType presentationType() const { return MediaSession::WebAudio; } 57 virtual bool canReceiveRemoteControlCommands() const override { return false; } 58 virtual void didReceiveRemoteControlCommand(MediaSession::RemoteControlCommandType) override { } 59 virtual bool overrideBackgroundPlaybackRestriction() const override { return false; } 60 61 virtual void start() override; 62 virtual void stop() override; 63 virtual bool isPlaying() override { return m_isPlaying; } 64 65 virtual void pausePlayback() override { stop(); } 66 virtual void resumePlayback() override { start(); } 67 68 virtual float sampleRate() const override { return m_sampleRate; } 69 70 AudioUnit m_outputUnit; 71 AudioIOCallback& m_callback; 72 RefPtr<AudioBus> m_renderBus; 73 74 float m_sampleRate; 75 bool m_isPlaying; 76 77#if USE(AUDIO_SESSION) 78 std::unique_ptr<MediaSession> m_mediaSession; 79#endif 80}; 81 82} // namespace WebCore 83 84#endif // AudioDestinationMac_h 85