| /* |
| * Copyright (C) 2011, Google Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY |
| * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON |
| * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "config.h" |
| |
| #if ENABLE(WEB_AUDIO) |
| |
| #include "modules/webaudio/OfflineAudioDestinationNode.h" |
| |
| #include "core/dom/CrossThreadTask.h" |
| #include "modules/webaudio/AudioContext.h" |
| #include "platform/Task.h" |
| #include "platform/audio/AudioBus.h" |
| #include "platform/audio/HRTFDatabaseLoader.h" |
| #include "public/platform/Platform.h" |
| #include <algorithm> |
| |
| namespace blink { |
| |
| const size_t renderQuantumSize = 128; |
| |
| OfflineAudioDestinationNode::OfflineAudioDestinationNode(AudioContext* context, AudioBuffer* renderTarget) |
| : AudioDestinationNode(context, renderTarget->sampleRate()) |
| , m_renderTarget(renderTarget) |
| , m_startedRendering(false) |
| { |
| m_renderBus = AudioBus::create(renderTarget->numberOfChannels(), renderQuantumSize); |
| } |
| |
| OfflineAudioDestinationNode::~OfflineAudioDestinationNode() |
| { |
| ASSERT(!isInitialized()); |
| } |
| |
| void OfflineAudioDestinationNode::dispose() |
| { |
| uninitialize(); |
| AudioDestinationNode::dispose(); |
| } |
| |
| void OfflineAudioDestinationNode::initialize() |
| { |
| if (isInitialized()) |
| return; |
| |
| AudioNode::initialize(); |
| } |
| |
| void OfflineAudioDestinationNode::uninitialize() |
| { |
| if (!isInitialized()) |
| return; |
| |
| if (m_renderThread) |
| m_renderThread.clear(); |
| |
| AudioNode::uninitialize(); |
| } |
| |
| void OfflineAudioDestinationNode::startRendering() |
| { |
| ASSERT(isMainThread()); |
| ASSERT(m_renderTarget); |
| if (!m_renderTarget) |
| return; |
| |
| if (!m_startedRendering) { |
| m_startedRendering = true; |
| context()->notifyNodeStartedProcessing(this); |
| m_renderThread = adoptPtr(blink::Platform::current()->createThread("Offline Audio Renderer")); |
| m_renderThread->postTask(new Task(bind(&OfflineAudioDestinationNode::offlineRender, this))); |
| } |
| } |
| |
| void OfflineAudioDestinationNode::offlineRender() |
| { |
| offlineRenderInternal(); |
| context()->notifyNodeFinishedProcessing(this); |
| context()->handlePostRenderTasks(); |
| } |
| |
| void OfflineAudioDestinationNode::offlineRenderInternal() |
| { |
| ASSERT(!isMainThread()); |
| ASSERT(m_renderBus); |
| if (!m_renderBus) |
| return; |
| |
| bool isAudioContextInitialized = context()->isInitialized(); |
| ASSERT(isAudioContextInitialized); |
| if (!isAudioContextInitialized) |
| return; |
| |
| bool channelsMatch = m_renderBus->numberOfChannels() == m_renderTarget->numberOfChannels(); |
| ASSERT(channelsMatch); |
| if (!channelsMatch) |
| return; |
| |
| bool isRenderBusAllocated = m_renderBus->length() >= renderQuantumSize; |
| ASSERT(isRenderBusAllocated); |
| if (!isRenderBusAllocated) |
| return; |
| |
| // Break up the render target into smaller "render quantize" sized pieces. |
| // Render until we're finished. |
| size_t framesToProcess = m_renderTarget->length(); |
| unsigned numberOfChannels = m_renderTarget->numberOfChannels(); |
| |
| unsigned n = 0; |
| while (framesToProcess > 0) { |
| // Render one render quantum. |
| render(0, m_renderBus.get(), renderQuantumSize); |
| |
| size_t framesAvailableToCopy = std::min(framesToProcess, renderQuantumSize); |
| |
| for (unsigned channelIndex = 0; channelIndex < numberOfChannels; ++channelIndex) { |
| const float* source = m_renderBus->channel(channelIndex)->data(); |
| float* destination = m_renderTarget->getChannelData(channelIndex)->data(); |
| memcpy(destination + n, source, sizeof(float) * framesAvailableToCopy); |
| } |
| |
| n += framesAvailableToCopy; |
| framesToProcess -= framesAvailableToCopy; |
| } |
| |
| // Our work is done. Let the AudioContext know. |
| if (context()->executionContext()) |
| context()->executionContext()->postTask(createCrossThreadTask(&OfflineAudioDestinationNode::notifyComplete, this)); |
| } |
| |
| void OfflineAudioDestinationNode::notifyComplete() |
| { |
| context()->fireCompletionEvent(); |
| } |
| |
| void OfflineAudioDestinationNode::trace(Visitor* visitor) |
| { |
| visitor->trace(m_renderTarget); |
| AudioDestinationNode::trace(visitor); |
| } |
| |
| } // namespace blink |
| |
| #endif // ENABLE(WEB_AUDIO) |