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| 1 /* | 1 /* |
| 2 * Copyright (C) 2011, Google Inc. All rights reserved. | 2 * Copyright (C) 2011, Google Inc. All rights reserved. |
| 3 * | 3 * |
| 4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
| 5 * modification, are permitted provided that the following conditions | 5 * modification, are permitted provided that the following conditions |
| 6 * are met: | 6 * are met: |
| 7 * 1. Redistributions of source code must retain the above copyright | 7 * 1. Redistributions of source code must retain the above copyright |
| 8 * notice, this list of conditions and the following disclaimer. | 8 * notice, this list of conditions and the following disclaimer. |
| 9 * 2. Redistributions in binary form must reproduce the above copyright | 9 * 2. Redistributions in binary form must reproduce the above copyright |
| 10 * notice, this list of conditions and the following disclaimer in the | 10 * notice, this list of conditions and the following disclaimer in the |
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| 29 #include "modules/webaudio/OfflineAudioDestinationNode.h" | 29 #include "modules/webaudio/OfflineAudioDestinationNode.h" |
| 30 | 30 |
| 31 #include <algorithm> | 31 #include <algorithm> |
| 32 #include "platform/audio/AudioBus.h" | 32 #include "platform/audio/AudioBus.h" |
| 33 #include "platform/audio/HRTFDatabaseLoader.h" | 33 #include "platform/audio/HRTFDatabaseLoader.h" |
| 34 #include "modules/webaudio/AudioContext.h" | 34 #include "modules/webaudio/AudioContext.h" |
| 35 #include "platform/Task.h" | 35 #include "platform/Task.h" |
| 36 #include "public/platform/Platform.h" | 36 #include "public/platform/Platform.h" |
| 37 #include "wtf/MainThread.h" | 37 #include "wtf/MainThread.h" |
| 38 | 38 |
| 39 using namespace std; | |
| 40 | |
| 41 namespace WebCore { | 39 namespace WebCore { |
| 42 | 40 |
| 43 const size_t renderQuantumSize = 128; | 41 const size_t renderQuantumSize = 128; |
| 44 | 42 |
| 45 OfflineAudioDestinationNode::OfflineAudioDestinationNode(AudioContext* context,
AudioBuffer* renderTarget) | 43 OfflineAudioDestinationNode::OfflineAudioDestinationNode(AudioContext* context,
AudioBuffer* renderTarget) |
| 46 : AudioDestinationNode(context, renderTarget->sampleRate()) | 44 : AudioDestinationNode(context, renderTarget->sampleRate()) |
| 47 , m_renderTarget(renderTarget) | 45 , m_renderTarget(renderTarget) |
| 48 , m_startedRendering(false) | 46 , m_startedRendering(false) |
| 49 { | 47 { |
| 50 m_renderBus = AudioBus::create(renderTarget->numberOfChannels(), renderQuant
umSize); | 48 m_renderBus = AudioBus::create(renderTarget->numberOfChannels(), renderQuant
umSize); |
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| 114 // Break up the render target into smaller "render quantize" sized pieces. | 112 // Break up the render target into smaller "render quantize" sized pieces. |
| 115 // Render until we're finished. | 113 // Render until we're finished. |
| 116 size_t framesToProcess = m_renderTarget->length(); | 114 size_t framesToProcess = m_renderTarget->length(); |
| 117 unsigned numberOfChannels = m_renderTarget->numberOfChannels(); | 115 unsigned numberOfChannels = m_renderTarget->numberOfChannels(); |
| 118 | 116 |
| 119 unsigned n = 0; | 117 unsigned n = 0; |
| 120 while (framesToProcess > 0) { | 118 while (framesToProcess > 0) { |
| 121 // Render one render quantum. | 119 // Render one render quantum. |
| 122 render(0, m_renderBus.get(), renderQuantumSize); | 120 render(0, m_renderBus.get(), renderQuantumSize); |
| 123 | 121 |
| 124 size_t framesAvailableToCopy = min(framesToProcess, renderQuantumSize); | 122 size_t framesAvailableToCopy = std::min(framesToProcess, renderQuantumSi
ze); |
| 125 | 123 |
| 126 for (unsigned channelIndex = 0; channelIndex < numberOfChannels; ++chann
elIndex) { | 124 for (unsigned channelIndex = 0; channelIndex < numberOfChannels; ++chann
elIndex) { |
| 127 const float* source = m_renderBus->channel(channelIndex)->data(); | 125 const float* source = m_renderBus->channel(channelIndex)->data(); |
| 128 float* destination = m_renderTarget->getChannelData(channelIndex)->d
ata(); | 126 float* destination = m_renderTarget->getChannelData(channelIndex)->d
ata(); |
| 129 memcpy(destination + n, source, sizeof(float) * framesAvailableToCop
y); | 127 memcpy(destination + n, source, sizeof(float) * framesAvailableToCop
y); |
| 130 } | 128 } |
| 131 | 129 |
| 132 n += framesAvailableToCopy; | 130 n += framesAvailableToCopy; |
| 133 framesToProcess -= framesAvailableToCopy; | 131 framesToProcess -= framesAvailableToCopy; |
| 134 } | 132 } |
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| 155 | 153 |
| 156 void OfflineAudioDestinationNode::trace(Visitor* visitor) | 154 void OfflineAudioDestinationNode::trace(Visitor* visitor) |
| 157 { | 155 { |
| 158 visitor->trace(m_renderTarget); | 156 visitor->trace(m_renderTarget); |
| 159 AudioDestinationNode::trace(visitor); | 157 AudioDestinationNode::trace(visitor); |
| 160 } | 158 } |
| 161 | 159 |
| 162 } // namespace WebCore | 160 } // namespace WebCore |
| 163 | 161 |
| 164 #endif // ENABLE(WEB_AUDIO) | 162 #endif // ENABLE(WEB_AUDIO) |
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