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 27#if ENABLE(WEB_AUDIO) 28 29#include "AudioSummingJunction.h" 30 31#include "AudioContext.h" 32#include "AudioNodeOutput.h" 33#include <algorithm> 34 35using namespace std; 36 37namespace WebCore { 38 39AudioSummingJunction::AudioSummingJunction(AudioContext* context) 40 : m_context(context) 41 , m_renderingStateNeedUpdating(false) 42{ 43} 44 45AudioSummingJunction::~AudioSummingJunction() 46{ 47 if (m_renderingStateNeedUpdating && m_context.get()) 48 m_context->removeMarkedSummingJunction(this); 49} 50 51void AudioSummingJunction::changedOutputs() 52{ 53 ASSERT(context()->isGraphOwner()); 54 if (!m_renderingStateNeedUpdating && canUpdateState()) { 55 context()->markSummingJunctionDirty(this); 56 m_renderingStateNeedUpdating = true; 57 } 58} 59 60void AudioSummingJunction::updateRenderingState() 61{ 62 ASSERT(context()->isAudioThread() && context()->isGraphOwner()); 63 64 if (m_renderingStateNeedUpdating && canUpdateState()) { 65 // Copy from m_outputs to m_renderingOutputs. 66 m_renderingOutputs.resize(m_outputs.size()); 67 unsigned j = 0; 68 for (HashSet<AudioNodeOutput*>::iterator i = m_outputs.begin(); i != m_outputs.end(); ++i, ++j) { 69 AudioNodeOutput* output = *i; 70 m_renderingOutputs[j] = output; 71 output->updateRenderingState(); 72 } 73 74 didUpdate(); 75 76 m_renderingStateNeedUpdating = false; 77 } 78} 79 80} // namespace WebCore 81 82#endif // ENABLE(WEB_AUDIO) 83