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 35 using namespace std; 36 37 namespace WebCore { 38 39 AudioSummingJunction::AudioSummingJunction(AudioContext* context) 40 : m_context(context) 41 , m_renderingStateNeedUpdating(false) 42 { 43 } 44 45 AudioSummingJunction::~AudioSummingJunction() 46 { 47 if (m_renderingStateNeedUpdating && m_context.get()) 48 m_context->removeMarkedSummingJunction(this); 49 } 50 51 void AudioSummingJunction::changedOutputs() 52 { 53 ASSERT(context()->isGraphOwner()); 54 if (!m_renderingStateNeedUpdating && canUpdateState()) { 55 context()->markSummingJunctionDirty(this); 56 m_renderingStateNeedUpdating = true; 57 } 58 } 59 60 void 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