1/* 2 * Copyright (C) 2012, 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 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 15 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 16 * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY 17 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 18 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 19 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 20 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 22 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 23 */ 24 25#include "config.h" 26#if ENABLE(WEB_AUDIO) 27#include "modules/webaudio/MediaStreamAudioDestinationNode.h" 28 29#include "modules/webaudio/AudioContext.h" 30#include "modules/webaudio/AudioNodeInput.h" 31#include "platform/UUID.h" 32#include "platform/mediastream/MediaStreamCenter.h" 33#include "public/platform/WebRTCPeerConnectionHandler.h" 34#include "wtf/Locker.h" 35 36namespace blink { 37 38MediaStreamAudioDestinationNode* MediaStreamAudioDestinationNode::create(AudioContext* context, size_t numberOfChannels) 39{ 40 return adoptRefCountedGarbageCollectedWillBeNoop(new MediaStreamAudioDestinationNode(context, numberOfChannels)); 41} 42 43MediaStreamAudioDestinationNode::MediaStreamAudioDestinationNode(AudioContext* context, size_t numberOfChannels) 44 : AudioBasicInspectorNode(context, context->sampleRate(), numberOfChannels) 45 , m_mixBus(AudioBus::create(numberOfChannels, ProcessingSizeInFrames)) 46{ 47 setNodeType(NodeTypeMediaStreamAudioDestination); 48 49 m_source = MediaStreamSource::create("WebAudio-" + createCanonicalUUIDString(), MediaStreamSource::TypeAudio, "MediaStreamAudioDestinationNode", MediaStreamSource::ReadyStateLive, true); 50 MediaStreamSourceVector audioSources; 51 audioSources.append(m_source); 52 MediaStreamSourceVector videoSources; 53 m_stream = MediaStream::create(context->executionContext(), MediaStreamDescriptor::create(audioSources, videoSources)); 54 MediaStreamCenter::instance().didCreateMediaStreamAndTracks(m_stream->descriptor()); 55 56 m_source->setAudioFormat(numberOfChannels, context->sampleRate()); 57 58 initialize(); 59} 60 61MediaStreamAudioDestinationNode::~MediaStreamAudioDestinationNode() 62{ 63 ASSERT(!isInitialized()); 64} 65 66void MediaStreamAudioDestinationNode::dispose() 67{ 68 uninitialize(); 69 AudioBasicInspectorNode::dispose(); 70} 71 72void MediaStreamAudioDestinationNode::trace(Visitor* visitor) 73{ 74 visitor->trace(m_stream); 75 AudioBasicInspectorNode::trace(visitor); 76} 77 78void MediaStreamAudioDestinationNode::process(size_t numberOfFrames) 79{ 80 m_mixBus->copyFrom(*input(0)->bus()); 81 m_source->consumeAudio(m_mixBus.get(), numberOfFrames); 82} 83 84} // namespace blink 85 86#endif // ENABLE(WEB_AUDIO) 87