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 "modules/webaudio/AudioSummingJunction.h" 30 31#include "modules/webaudio/AudioContext.h" 32#include "modules/webaudio/AudioNodeOutput.h" 33#include <algorithm> 34 35namespace blink { 36 37AudioSummingJunction::AudioSummingJunction(AudioContext* context) 38 : m_context(context) 39 , m_renderingStateNeedUpdating(false) 40 , m_didCallDispose(false) 41{ 42 ASSERT(context); 43 m_context->registerLiveAudioSummingJunction(*this); 44} 45 46void AudioSummingJunction::dispose() 47{ 48 m_didCallDispose = true; 49 m_context->removeMarkedSummingJunction(this); 50} 51 52AudioSummingJunction::~AudioSummingJunction() 53{ 54} 55 56void AudioSummingJunction::trace(Visitor* visitor) 57{ 58 visitor->trace(m_context); 59} 60 61void AudioSummingJunction::changedOutputs() 62{ 63 ASSERT(context()->isGraphOwner()); 64 if (!m_renderingStateNeedUpdating && !m_didCallDispose) { 65 context()->markSummingJunctionDirty(this); 66 m_renderingStateNeedUpdating = true; 67 } 68} 69 70void AudioSummingJunction::updateRenderingState() 71{ 72 ASSERT(context()->isAudioThread() && context()->isGraphOwner()); 73 if (m_renderingStateNeedUpdating) { 74 // Copy from m_outputs to m_renderingOutputs. 75 m_renderingOutputs.resize(m_outputs.size()); 76 unsigned j = 0; 77 for (HashSet<AudioNodeOutput*>::iterator i = m_outputs.begin(); i != m_outputs.end(); ++i, ++j) { 78 AudioNodeOutput* output = *i; 79 m_renderingOutputs[j] = output; 80 output->updateRenderingState(); 81 } 82 83 didUpdate(); 84 85 m_renderingStateNeedUpdating = false; 86 } 87} 88 89} // namespace blink 90 91#endif // ENABLE(WEB_AUDIO) 92