| /* |
| * 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. |
| * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of |
| * its contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE 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 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 "platform/audio/HRTFDatabaseLoader.h" |
| |
| #include "platform/audio/HRTFDatabase.h" |
| #include "wtf/MainThread.h" |
| |
| namespace WebCore { |
| |
| // Singleton |
| HRTFDatabaseLoader::LoaderMap* HRTFDatabaseLoader::s_loaderMap = 0; |
| |
| PassRefPtr<HRTFDatabaseLoader> HRTFDatabaseLoader::createAndLoadAsynchronouslyIfNecessary(float sampleRate) |
| { |
| ASSERT(isMainThread()); |
| |
| RefPtr<HRTFDatabaseLoader> loader; |
| |
| if (!s_loaderMap) |
| s_loaderMap = adoptPtr(new LoaderMap()).leakPtr(); |
| |
| loader = s_loaderMap->get(sampleRate); |
| if (loader) { |
| ASSERT(sampleRate == loader->databaseSampleRate()); |
| return loader; |
| } |
| |
| loader = adoptRef(new HRTFDatabaseLoader(sampleRate)); |
| s_loaderMap->add(sampleRate, loader.get()); |
| |
| loader->loadAsynchronously(); |
| |
| return loader; |
| } |
| |
| HRTFDatabaseLoader::HRTFDatabaseLoader(float sampleRate) |
| : m_databaseLoaderThread(0) |
| , m_databaseSampleRate(sampleRate) |
| { |
| ASSERT(isMainThread()); |
| } |
| |
| HRTFDatabaseLoader::~HRTFDatabaseLoader() |
| { |
| ASSERT(isMainThread()); |
| |
| waitForLoaderThreadCompletion(); |
| m_hrtfDatabase.clear(); |
| |
| // Remove ourself from the map. |
| if (s_loaderMap) |
| s_loaderMap->remove(m_databaseSampleRate); |
| } |
| |
| // Asynchronously load the database in this thread. |
| static void databaseLoaderEntry(void* threadData) |
| { |
| HRTFDatabaseLoader* loader = reinterpret_cast<HRTFDatabaseLoader*>(threadData); |
| ASSERT(loader); |
| loader->load(); |
| } |
| |
| void HRTFDatabaseLoader::load() |
| { |
| ASSERT(!isMainThread()); |
| if (!m_hrtfDatabase.get()) { |
| // Load the default HRTF database. |
| m_hrtfDatabase = HRTFDatabase::create(m_databaseSampleRate); |
| } |
| } |
| |
| void HRTFDatabaseLoader::loadAsynchronously() |
| { |
| ASSERT(isMainThread()); |
| |
| MutexLocker locker(m_threadLock); |
| |
| if (!m_hrtfDatabase.get() && !m_databaseLoaderThread) { |
| // Start the asynchronous database loading process. |
| m_databaseLoaderThread = createThread(databaseLoaderEntry, this, "HRTF database loader"); |
| } |
| } |
| |
| bool HRTFDatabaseLoader::isLoaded() const |
| { |
| return m_hrtfDatabase.get(); |
| } |
| |
| void HRTFDatabaseLoader::waitForLoaderThreadCompletion() |
| { |
| MutexLocker locker(m_threadLock); |
| |
| // waitForThreadCompletion() should not be called twice for the same thread. |
| if (m_databaseLoaderThread) |
| waitForThreadCompletion(m_databaseLoaderThread); |
| m_databaseLoaderThread = 0; |
| } |
| |
| } // namespace WebCore |
| |
| #endif // ENABLE(WEB_AUDIO) |