From 6bf0a5cb5034a7e684dcc3500e841785237ce2dd Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 19:32:43 +0200 Subject: Adding upstream version 1:115.7.0. Signed-off-by: Daniel Baumann --- dom/media/webaudio/blink/HRTFDatabaseLoader.cpp | 215 ++++++++++++++++++++++++ 1 file changed, 215 insertions(+) create mode 100644 dom/media/webaudio/blink/HRTFDatabaseLoader.cpp (limited to 'dom/media/webaudio/blink/HRTFDatabaseLoader.cpp') diff --git a/dom/media/webaudio/blink/HRTFDatabaseLoader.cpp b/dom/media/webaudio/blink/HRTFDatabaseLoader.cpp new file mode 100644 index 0000000000..3db455545e --- /dev/null +++ b/dom/media/webaudio/blink/HRTFDatabaseLoader.cpp @@ -0,0 +1,215 @@ +/* + * 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 "HRTFDatabaseLoader.h" +#include "HRTFDatabase.h" +#include "GeckoProfiler.h" +#include "nsThreadUtils.h" + +using namespace mozilla; + +namespace WebCore { + +// Singleton +nsTHashtable* + HRTFDatabaseLoader::s_loaderMap = nullptr; + +size_t HRTFDatabaseLoader::sizeOfLoaders(mozilla::MallocSizeOf aMallocSizeOf) { + return s_loaderMap ? s_loaderMap->SizeOfIncludingThis(aMallocSizeOf) : 0; +} + +already_AddRefed +HRTFDatabaseLoader::createAndLoadAsynchronouslyIfNecessary(float sampleRate) { + MOZ_ASSERT(NS_IsMainThread()); + + RefPtr loader; + + if (!s_loaderMap) { + s_loaderMap = new nsTHashtable(); + } + + LoaderByRateEntry* entry = s_loaderMap->PutEntry(sampleRate); + loader = entry->mLoader; + if (loader) { // existing entry + MOZ_ASSERT(sampleRate == loader->databaseSampleRate()); + return loader.forget(); + } + + loader = new HRTFDatabaseLoader(sampleRate); + entry->mLoader = loader; + + loader->loadAsynchronously(); + + return loader.forget(); +} + +HRTFDatabaseLoader::HRTFDatabaseLoader(float sampleRate) + : m_refCnt(0), + m_threadLock("HRTFDatabaseLoader"), + m_databaseLoaderThread(nullptr), + m_databaseSampleRate(sampleRate), + m_databaseLoaded(false) { + MOZ_ASSERT(NS_IsMainThread()); +} + +HRTFDatabaseLoader::~HRTFDatabaseLoader() { + MOZ_ASSERT(NS_IsMainThread()); + + waitForLoaderThreadCompletion(); + m_hrtfDatabase.reset(); + + if (s_loaderMap) { + // Remove ourself from the map. + s_loaderMap->RemoveEntry(m_databaseSampleRate); + if (s_loaderMap->Count() == 0) { + delete s_loaderMap; + s_loaderMap = nullptr; + } + } +} + +size_t HRTFDatabaseLoader::sizeOfIncludingThis( + mozilla::MallocSizeOf aMallocSizeOf) const { + size_t amount = aMallocSizeOf(this); + + // NB: Need to make sure we're not competing with the loader thread. + const_cast(this)->waitForLoaderThreadCompletion(); + + if (m_hrtfDatabase) { + amount += m_hrtfDatabase->sizeOfIncludingThis(aMallocSizeOf); + } + + return amount; +} + +class HRTFDatabaseLoader::ProxyReleaseEvent final : public Runnable { + public: + explicit ProxyReleaseEvent(HRTFDatabaseLoader* loader) + : mozilla::Runnable("WebCore::HRTFDatabaseLoader::ProxyReleaseEvent"), + mLoader(loader) {} + NS_IMETHOD Run() override { + mLoader->MainThreadRelease(); + return NS_OK; + } + + private: + // Ownership transferred by ProxyRelease + HRTFDatabaseLoader* MOZ_OWNING_REF mLoader; +}; + +void HRTFDatabaseLoader::ProxyRelease() { + nsCOMPtr mainTarget = GetMainThreadSerialEventTarget(); + if (MOZ_LIKELY(mainTarget)) { + RefPtr event = new ProxyReleaseEvent(this); + DebugOnly rv = mainTarget->Dispatch(event, NS_DISPATCH_NORMAL); + MOZ_ASSERT(NS_SUCCEEDED(rv), "Failed to dispatch release event"); + } else { + // Should be in XPCOM shutdown. + MOZ_ASSERT(NS_IsMainThread(), "Main thread is not available for dispatch."); + MainThreadRelease(); + } +} + +void HRTFDatabaseLoader::MainThreadRelease() { + MOZ_ASSERT(NS_IsMainThread()); + int count = --m_refCnt; + MOZ_ASSERT(count >= 0, "extra release"); + NS_LOG_RELEASE(this, count, "HRTFDatabaseLoader"); + if (count == 0) { + // It is safe to delete here as the first reference can only be added + // on this (main) thread. + delete this; + } +} + +// Asynchronously load the database in this thread. +static void databaseLoaderEntry(void* threadData) { + AUTO_PROFILER_REGISTER_THREAD("HRTFDatabaseLdr"); + NS_SetCurrentThreadName("HRTFDatabaseLdr"); + + HRTFDatabaseLoader* loader = + reinterpret_cast(threadData); + MOZ_ASSERT(loader); + loader->load(); +} + +void HRTFDatabaseLoader::load() { + MOZ_ASSERT(!NS_IsMainThread()); + MOZ_ASSERT(!m_hrtfDatabase.get(), "Called twice"); + // Load the default HRTF database. + m_hrtfDatabase = HRTFDatabase::create(m_databaseSampleRate); + m_databaseLoaded = true; + // Notifies the main thread of completion. See loadAsynchronously(). + Release(); +} + +void HRTFDatabaseLoader::loadAsynchronously() { + MOZ_ASSERT(NS_IsMainThread()); + MOZ_ASSERT(m_refCnt, "Must not be called before a reference is added"); + + // Add a reference so that the destructor won't run and wait for the + // loader thread, until load() has completed. + AddRef(); + + MutexAutoLock locker(m_threadLock); + + MOZ_ASSERT(!m_hrtfDatabase.get() && !m_databaseLoaderThread, "Called twice"); + // Start the asynchronous database loading process. + m_databaseLoaderThread = PR_CreateThread( + PR_USER_THREAD, databaseLoaderEntry, this, PR_PRIORITY_NORMAL, + PR_GLOBAL_THREAD, PR_JOINABLE_THREAD, 0); +} + +bool HRTFDatabaseLoader::isLoaded() const { return m_hrtfDatabase.get(); } + +void HRTFDatabaseLoader::waitForLoaderThreadCompletion() { + MutexAutoLock locker(m_threadLock); + + // waitForThreadCompletion() should not be called twice for the same thread. + if (m_databaseLoaderThread) { + DebugOnly status = PR_JoinThread(m_databaseLoaderThread); + MOZ_ASSERT(status == PR_SUCCESS, "PR_JoinThread failed"); + } + m_databaseLoaderThread = nullptr; +} + +void HRTFDatabaseLoader::shutdown() { + MOZ_ASSERT(NS_IsMainThread()); + if (s_loaderMap) { + // Set s_loaderMap to nullptr so that the hashtable is not modified on + // reference release during enumeration. + nsTHashtable* loaderMap = s_loaderMap; + s_loaderMap = nullptr; + for (auto iter = loaderMap->Iter(); !iter.Done(); iter.Next()) { + iter.Get()->mLoader->waitForLoaderThreadCompletion(); + } + delete loaderMap; + } +} + +} // namespace WebCore -- cgit v1.2.3