| /* |
| * Copyright (C) 2010, 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/DeferredTaskHandler.h" |
| |
| #include "modules/webaudio/AudioNode.h" |
| #include "modules/webaudio/AudioNodeOutput.h" |
| #include "modules/webaudio/OfflineAudioContext.h" |
| #include "platform/ThreadSafeFunctional.h" |
| #include "public/platform/Platform.h" |
| #include "wtf/MainThread.h" |
| |
| namespace blink { |
| |
| void DeferredTaskHandler::lock() |
| { |
| // Don't allow regular lock in real-time audio thread. |
| ASSERT(!isAudioThread()); |
| m_contextGraphMutex.lock(); |
| } |
| |
| bool DeferredTaskHandler::tryLock() |
| { |
| // Try to catch cases of using try lock on main thread |
| // - it should use regular lock. |
| ASSERT(isAudioThread()); |
| if (!isAudioThread()) { |
| // In release build treat tryLock() as lock() (since above |
| // ASSERT(isAudioThread) never fires) - this is the best we can do. |
| lock(); |
| return true; |
| } |
| return m_contextGraphMutex.tryLock(); |
| } |
| |
| void DeferredTaskHandler::unlock() |
| { |
| m_contextGraphMutex.unlock(); |
| } |
| |
| void DeferredTaskHandler::offlineLock() |
| { |
| // RELEASE_ASSERT is here to make sure to explicitly crash if this is called |
| // from other than the offline render thread, which is considered as the |
| // audio thread in OfflineAudioContext. |
| RELEASE_ASSERT_WITH_MESSAGE(isAudioThread(), |
| "DeferredTaskHandler::offlineLock() must be called within the offline audio thread."); |
| |
| m_contextGraphMutex.lock(); |
| } |
| |
| #if ENABLE(ASSERT) |
| bool DeferredTaskHandler::isGraphOwner() |
| { |
| return m_contextGraphMutex.locked(); |
| } |
| #endif |
| |
| void DeferredTaskHandler::addDeferredBreakConnection(AudioHandler& node) |
| { |
| ASSERT(isAudioThread()); |
| m_deferredBreakConnectionList.append(&node); |
| } |
| |
| void DeferredTaskHandler::breakConnections() |
| { |
| ASSERT(isAudioThread()); |
| ASSERT(isGraphOwner()); |
| |
| for (unsigned i = 0; i < m_deferredBreakConnectionList.size(); ++i) |
| m_deferredBreakConnectionList[i]->breakConnectionWithLock(); |
| m_deferredBreakConnectionList.clear(); |
| } |
| |
| void DeferredTaskHandler::markSummingJunctionDirty(AudioSummingJunction* summingJunction) |
| { |
| ASSERT(isGraphOwner()); |
| m_dirtySummingJunctions.add(summingJunction); |
| } |
| |
| void DeferredTaskHandler::removeMarkedSummingJunction(AudioSummingJunction* summingJunction) |
| { |
| ASSERT(isMainThread()); |
| AutoLocker locker(*this); |
| m_dirtySummingJunctions.remove(summingJunction); |
| } |
| |
| void DeferredTaskHandler::markAudioNodeOutputDirty(AudioNodeOutput* output) |
| { |
| ASSERT(isGraphOwner()); |
| ASSERT(isMainThread()); |
| m_dirtyAudioNodeOutputs.add(output); |
| } |
| |
| void DeferredTaskHandler::removeMarkedAudioNodeOutput(AudioNodeOutput* output) |
| { |
| ASSERT(isGraphOwner()); |
| ASSERT(isMainThread()); |
| m_dirtyAudioNodeOutputs.remove(output); |
| } |
| |
| void DeferredTaskHandler::handleDirtyAudioSummingJunctions() |
| { |
| ASSERT(isGraphOwner()); |
| |
| for (AudioSummingJunction* junction : m_dirtySummingJunctions) |
| junction->updateRenderingState(); |
| m_dirtySummingJunctions.clear(); |
| } |
| |
| void DeferredTaskHandler::handleDirtyAudioNodeOutputs() |
| { |
| ASSERT(isGraphOwner()); |
| |
| for (AudioNodeOutput* output : m_dirtyAudioNodeOutputs) |
| output->updateRenderingState(); |
| m_dirtyAudioNodeOutputs.clear(); |
| } |
| |
| void DeferredTaskHandler::addAutomaticPullNode(AudioHandler* node) |
| { |
| ASSERT(isGraphOwner()); |
| |
| if (!m_automaticPullNodes.contains(node)) { |
| m_automaticPullNodes.add(node); |
| m_automaticPullNodesNeedUpdating = true; |
| } |
| } |
| |
| void DeferredTaskHandler::removeAutomaticPullNode(AudioHandler* node) |
| { |
| ASSERT(isGraphOwner()); |
| |
| if (m_automaticPullNodes.contains(node)) { |
| m_automaticPullNodes.remove(node); |
| m_automaticPullNodesNeedUpdating = true; |
| } |
| } |
| |
| void DeferredTaskHandler::updateAutomaticPullNodes() |
| { |
| ASSERT(isGraphOwner()); |
| |
| if (m_automaticPullNodesNeedUpdating) { |
| copyToVector(m_automaticPullNodes, m_renderingAutomaticPullNodes); |
| m_automaticPullNodesNeedUpdating = false; |
| } |
| } |
| |
| void DeferredTaskHandler::processAutomaticPullNodes(size_t framesToProcess) |
| { |
| ASSERT(isAudioThread()); |
| |
| for (unsigned i = 0; i < m_renderingAutomaticPullNodes.size(); ++i) |
| m_renderingAutomaticPullNodes[i]->processIfNecessary(framesToProcess); |
| } |
| |
| void DeferredTaskHandler::addChangedChannelCountMode(AudioHandler* node) |
| { |
| ASSERT(isGraphOwner()); |
| ASSERT(isMainThread()); |
| m_deferredCountModeChange.add(node); |
| } |
| |
| void DeferredTaskHandler::removeChangedChannelCountMode(AudioHandler* node) |
| { |
| ASSERT(isGraphOwner()); |
| |
| m_deferredCountModeChange.remove(node); |
| } |
| |
| void DeferredTaskHandler::updateChangedChannelCountMode() |
| { |
| ASSERT(isGraphOwner()); |
| |
| for (AudioHandler* node : m_deferredCountModeChange) |
| node->updateChannelCountMode(); |
| m_deferredCountModeChange.clear(); |
| } |
| |
| DeferredTaskHandler::DeferredTaskHandler() |
| : m_automaticPullNodesNeedUpdating(false) |
| , m_audioThread(0) |
| { |
| } |
| |
| PassRefPtr<DeferredTaskHandler> DeferredTaskHandler::create() |
| { |
| return adoptRef(new DeferredTaskHandler()); |
| } |
| |
| DeferredTaskHandler::~DeferredTaskHandler() |
| { |
| ASSERT(!m_automaticPullNodes.size()); |
| if (m_automaticPullNodesNeedUpdating) |
| m_renderingAutomaticPullNodes.resize(m_automaticPullNodes.size()); |
| ASSERT(!m_renderingAutomaticPullNodes.size()); |
| } |
| |
| void DeferredTaskHandler::handleDeferredTasks() |
| { |
| updateChangedChannelCountMode(); |
| handleDirtyAudioSummingJunctions(); |
| handleDirtyAudioNodeOutputs(); |
| updateAutomaticPullNodes(); |
| } |
| |
| void DeferredTaskHandler::contextWillBeDestroyed() |
| { |
| for (auto& handler : m_renderingOrphanHandlers) |
| handler->clearContext(); |
| for (auto& handler : m_deletableOrphanHandlers) |
| handler->clearContext(); |
| clearHandlersToBeDeleted(); |
| // Some handlers might live because of their cross thread tasks. |
| } |
| |
| DeferredTaskHandler::AutoLocker::AutoLocker(AbstractAudioContext* context) |
| : m_handler(context->deferredTaskHandler()) |
| { |
| m_handler.lock(); |
| } |
| |
| DeferredTaskHandler::OfflineGraphAutoLocker::OfflineGraphAutoLocker(OfflineAudioContext* context) |
| : m_handler(context->deferredTaskHandler()) |
| { |
| m_handler.offlineLock(); |
| } |
| |
| void DeferredTaskHandler::addRenderingOrphanHandler(PassRefPtr<AudioHandler> handler) |
| { |
| ASSERT(handler); |
| ASSERT(!m_renderingOrphanHandlers.contains(handler)); |
| m_renderingOrphanHandlers.append(handler); |
| } |
| |
| void DeferredTaskHandler::requestToDeleteHandlersOnMainThread() |
| { |
| ASSERT(isGraphOwner()); |
| ASSERT(isAudioThread()); |
| if (m_renderingOrphanHandlers.isEmpty()) |
| return; |
| m_deletableOrphanHandlers.appendVector(m_renderingOrphanHandlers); |
| m_renderingOrphanHandlers.clear(); |
| Platform::current()->mainThread()->taskRunner()->postTask(BLINK_FROM_HERE, threadSafeBind(&DeferredTaskHandler::deleteHandlersOnMainThread, PassRefPtr<DeferredTaskHandler>(this))); |
| } |
| |
| void DeferredTaskHandler::deleteHandlersOnMainThread() |
| { |
| ASSERT(isMainThread()); |
| AutoLocker locker(*this); |
| m_deletableOrphanHandlers.clear(); |
| } |
| |
| void DeferredTaskHandler::clearHandlersToBeDeleted() |
| { |
| ASSERT(isMainThread()); |
| AutoLocker locker(*this); |
| m_renderingOrphanHandlers.clear(); |
| m_deletableOrphanHandlers.clear(); |
| } |
| |
| } // namespace blink |
| |
| #endif // ENABLE(WEB_AUDIO) |