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https://repo.dactyloidae.xyz/Dactyloidae/UXP.git
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import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo
This commit is contained in:
Roy Tam
commit
dcd9973243
150858 changed files with 23884658 additions and 0 deletions
421
dom/media/webaudio/AudioBuffer.cpp
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421
dom/media/webaudio/AudioBuffer.cpp
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:set ts=2 sw=2 sts=2 et cindent: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "AudioBuffer.h"
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#include "mozilla/dom/AudioBufferBinding.h"
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#include "jsfriendapi.h"
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#include "mozilla/ErrorResult.h"
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#include "AudioSegment.h"
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#include "AudioChannelFormat.h"
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#include "mozilla/PodOperations.h"
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#include "mozilla/CheckedInt.h"
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#include "mozilla/MemoryReporting.h"
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#include "AudioNodeEngine.h"
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namespace mozilla {
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namespace dom {
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NS_IMPL_CYCLE_COLLECTION_CLASS(AudioBuffer)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(AudioBuffer)
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NS_IMPL_CYCLE_COLLECTION_UNLINK(mJSChannels)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER
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tmp->ClearJSChannels();
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NS_IMPL_CYCLE_COLLECTION_UNLINK_END
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(AudioBuffer)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
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NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(AudioBuffer)
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NS_IMPL_CYCLE_COLLECTION_TRACE_PRESERVED_WRAPPER
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for (uint32_t i = 0; i < tmp->mJSChannels.Length(); ++i) {
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NS_IMPL_CYCLE_COLLECTION_TRACE_JS_MEMBER_CALLBACK(mJSChannels[i])
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}
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NS_IMPL_CYCLE_COLLECTION_TRACE_END
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NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(AudioBuffer, AddRef)
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NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(AudioBuffer, Release)
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/**
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* AudioBuffers can be shared between AudioContexts, so we need a separate
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* mechanism to track their memory usage. This thread-safe class keeps track of
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* all the AudioBuffers, and gets called back by the memory reporting system
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* when a memory report is needed, reporting how much memory is used by the
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* buffers backing AudioBuffer objects. */
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class AudioBufferMemoryTracker : public nsIMemoryReporter
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{
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NS_DECL_THREADSAFE_ISUPPORTS
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NS_DECL_NSIMEMORYREPORTER
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private:
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AudioBufferMemoryTracker();
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virtual ~AudioBufferMemoryTracker();
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public:
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/* Those methods can be called on any thread. */
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static void RegisterAudioBuffer(const AudioBuffer* aAudioBuffer);
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static void UnregisterAudioBuffer(const AudioBuffer* aAudioBuffer);
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private:
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static AudioBufferMemoryTracker* GetInstance();
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/* Those methods must be called with the lock held. */
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void RegisterAudioBufferInternal(const AudioBuffer* aAudioBuffer);
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/* Returns the number of buffers still present in the hash table. */
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uint32_t UnregisterAudioBufferInternal(const AudioBuffer* aAudioBuffer);
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void Init();
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/* This protects all members of this class. */
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static StaticMutex sMutex;
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static StaticRefPtr<AudioBufferMemoryTracker> sSingleton;
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nsTHashtable<nsPtrHashKey<const AudioBuffer>> mBuffers;
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};
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StaticRefPtr<AudioBufferMemoryTracker> AudioBufferMemoryTracker::sSingleton;
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StaticMutex AudioBufferMemoryTracker::sMutex;
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NS_IMPL_ISUPPORTS(AudioBufferMemoryTracker, nsIMemoryReporter);
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AudioBufferMemoryTracker* AudioBufferMemoryTracker::GetInstance()
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{
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sMutex.AssertCurrentThreadOwns();
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if (!sSingleton) {
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sSingleton = new AudioBufferMemoryTracker();
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sSingleton->Init();
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}
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return sSingleton;
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}
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AudioBufferMemoryTracker::AudioBufferMemoryTracker()
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{
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}
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void
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AudioBufferMemoryTracker::Init()
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{
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RegisterWeakMemoryReporter(this);
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}
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AudioBufferMemoryTracker::~AudioBufferMemoryTracker()
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{
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UnregisterWeakMemoryReporter(this);
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}
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void
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AudioBufferMemoryTracker::RegisterAudioBuffer(const AudioBuffer* aAudioBuffer)
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{
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StaticMutexAutoLock lock(sMutex);
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AudioBufferMemoryTracker* tracker = AudioBufferMemoryTracker::GetInstance();
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tracker->RegisterAudioBufferInternal(aAudioBuffer);
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}
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void
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AudioBufferMemoryTracker::UnregisterAudioBuffer(const AudioBuffer* aAudioBuffer)
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{
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StaticMutexAutoLock lock(sMutex);
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AudioBufferMemoryTracker* tracker = AudioBufferMemoryTracker::GetInstance();
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uint32_t count;
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count = tracker->UnregisterAudioBufferInternal(aAudioBuffer);
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if (count == 0) {
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sSingleton = nullptr;
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}
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}
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void
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AudioBufferMemoryTracker::RegisterAudioBufferInternal(const AudioBuffer* aAudioBuffer)
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{
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sMutex.AssertCurrentThreadOwns();
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mBuffers.PutEntry(aAudioBuffer);
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}
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uint32_t
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AudioBufferMemoryTracker::UnregisterAudioBufferInternal(const AudioBuffer* aAudioBuffer)
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{
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sMutex.AssertCurrentThreadOwns();
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mBuffers.RemoveEntry(aAudioBuffer);
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return mBuffers.Count();
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}
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MOZ_DEFINE_MALLOC_SIZE_OF(AudioBufferMemoryTrackerMallocSizeOf)
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NS_IMETHODIMP
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AudioBufferMemoryTracker::CollectReports(nsIHandleReportCallback* aHandleReport,
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nsISupports* aData, bool)
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{
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size_t amount = 0;
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for (auto iter = mBuffers.Iter(); !iter.Done(); iter.Next()) {
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amount += iter.Get()->GetKey()->SizeOfIncludingThis(AudioBufferMemoryTrackerMallocSizeOf);
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}
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MOZ_COLLECT_REPORT(
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"explicit/webaudio/audiobuffer", KIND_HEAP, UNITS_BYTES, amount,
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"Memory used by AudioBuffer objects (Web Audio).");
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return NS_OK;
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}
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AudioBuffer::AudioBuffer(AudioContext* aContext, uint32_t aNumberOfChannels,
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uint32_t aLength, float aSampleRate,
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already_AddRefed<ThreadSharedFloatArrayBufferList>
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aInitialContents)
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: mOwnerWindow(do_GetWeakReference(aContext->GetOwner())),
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mSharedChannels(aInitialContents),
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mLength(aLength),
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mSampleRate(aSampleRate)
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{
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MOZ_ASSERT(!mSharedChannels ||
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mSharedChannels->GetChannels() == aNumberOfChannels);
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mJSChannels.SetLength(aNumberOfChannels);
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mozilla::HoldJSObjects(this);
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AudioBufferMemoryTracker::RegisterAudioBuffer(this);
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}
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AudioBuffer::~AudioBuffer()
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{
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AudioBufferMemoryTracker::UnregisterAudioBuffer(this);
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ClearJSChannels();
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mozilla::DropJSObjects(this);
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}
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void
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AudioBuffer::ClearJSChannels()
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{
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mJSChannels.Clear();
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}
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/* static */ already_AddRefed<AudioBuffer>
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AudioBuffer::Create(AudioContext* aContext, uint32_t aNumberOfChannels,
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uint32_t aLength, float aSampleRate,
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already_AddRefed<ThreadSharedFloatArrayBufferList>
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aInitialContents,
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ErrorResult& aRv)
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{
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// Note that a buffer with zero channels is permitted here for the sake of
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// AudioProcessingEvent, where channel counts must match parameters passed
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// to createScriptProcessor(), one of which may be zero.
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if (aSampleRate < WebAudioUtils::MinSampleRate ||
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aSampleRate > WebAudioUtils::MaxSampleRate ||
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aNumberOfChannels > WebAudioUtils::MaxChannelCount ||
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!aLength || aLength > INT32_MAX) {
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aRv.Throw(NS_ERROR_DOM_INDEX_SIZE_ERR);
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return nullptr;
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}
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RefPtr<AudioBuffer> buffer =
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new AudioBuffer(aContext, aNumberOfChannels, aLength, aSampleRate,
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Move(aInitialContents));
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return buffer.forget();
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}
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JSObject*
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AudioBuffer::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
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{
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return AudioBufferBinding::Wrap(aCx, this, aGivenProto);
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}
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bool
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AudioBuffer::RestoreJSChannelData(JSContext* aJSContext)
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{
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for (uint32_t i = 0; i < mJSChannels.Length(); ++i) {
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if (mJSChannels[i]) {
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// Already have data in JS array.
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continue;
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}
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// The following code first zeroes the array and then copies our data
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// into it. We could avoid this with additional JS APIs to construct
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// an array (or ArrayBuffer) containing initial data.
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JS::Rooted<JSObject*> array(aJSContext,
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JS_NewFloat32Array(aJSContext, mLength));
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if (!array) {
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return false;
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}
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if (mSharedChannels) {
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// "4. Attach ArrayBuffers containing copies of the data to the
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// AudioBuffer, to be returned by the next call to getChannelData."
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const float* data = mSharedChannels->GetData(i);
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JS::AutoCheckCannotGC nogc;
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bool isShared;
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mozilla::PodCopy(JS_GetFloat32ArrayData(array, &isShared, nogc), data, mLength);
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MOZ_ASSERT(!isShared); // Was created as unshared above
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}
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mJSChannels[i] = array;
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}
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mSharedChannels = nullptr;
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return true;
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}
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void
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AudioBuffer::CopyFromChannel(const Float32Array& aDestination, uint32_t aChannelNumber,
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uint32_t aStartInChannel, ErrorResult& aRv)
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{
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aDestination.ComputeLengthAndData();
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uint32_t length = aDestination.Length();
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CheckedInt<uint32_t> end = aStartInChannel;
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end += length;
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if (aChannelNumber >= NumberOfChannels() ||
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!end.isValid() || end.value() > mLength) {
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aRv.Throw(NS_ERROR_DOM_INDEX_SIZE_ERR);
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return;
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}
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JS::AutoCheckCannotGC nogc;
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JSObject* channelArray = mJSChannels[aChannelNumber];
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const float* sourceData = nullptr;
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if (channelArray) {
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if (JS_GetTypedArrayLength(channelArray) != mLength) {
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// The array's buffer was detached.
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aRv.Throw(NS_ERROR_DOM_INDEX_SIZE_ERR);
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return;
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}
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bool isShared = false;
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sourceData = JS_GetFloat32ArrayData(channelArray, &isShared, nogc);
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// The sourceData arrays should all have originated in
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// RestoreJSChannelData, where they are created unshared.
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MOZ_ASSERT(!isShared);
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} else if (mSharedChannels) {
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sourceData = mSharedChannels->GetData(aChannelNumber);
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}
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if (sourceData) {
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PodMove(aDestination.Data(), sourceData + aStartInChannel, length);
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} else {
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PodZero(aDestination.Data(), length);
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}
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}
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void
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AudioBuffer::CopyToChannel(JSContext* aJSContext, const Float32Array& aSource,
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uint32_t aChannelNumber, uint32_t aStartInChannel,
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ErrorResult& aRv)
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{
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aSource.ComputeLengthAndData();
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uint32_t length = aSource.Length();
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CheckedInt<uint32_t> end = aStartInChannel;
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end += length;
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if (aChannelNumber >= NumberOfChannels() ||
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!end.isValid() || end.value() > mLength) {
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aRv.Throw(NS_ERROR_DOM_INDEX_SIZE_ERR);
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return;
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}
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if (!RestoreJSChannelData(aJSContext)) {
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aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
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return;
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}
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JS::AutoCheckCannotGC nogc;
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JSObject* channelArray = mJSChannels[aChannelNumber];
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if (JS_GetTypedArrayLength(channelArray) != mLength) {
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// The array's buffer was detached.
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aRv.Throw(NS_ERROR_DOM_INDEX_SIZE_ERR);
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return;
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}
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bool isShared = false;
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float* channelData = JS_GetFloat32ArrayData(channelArray, &isShared, nogc);
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// The channelData arrays should all have originated in
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// RestoreJSChannelData, where they are created unshared.
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MOZ_ASSERT(!isShared);
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PodMove(channelData + aStartInChannel, aSource.Data(), length);
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}
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void
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AudioBuffer::GetChannelData(JSContext* aJSContext, uint32_t aChannel,
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JS::MutableHandle<JSObject*> aRetval,
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ErrorResult& aRv)
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{
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if (aChannel >= NumberOfChannels()) {
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aRv.Throw(NS_ERROR_DOM_SYNTAX_ERR);
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return;
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}
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if (!RestoreJSChannelData(aJSContext)) {
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aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
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return;
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}
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aRetval.set(mJSChannels[aChannel]);
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}
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already_AddRefed<ThreadSharedFloatArrayBufferList>
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AudioBuffer::StealJSArrayDataIntoSharedChannels(JSContext* aJSContext)
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{
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// "1. If any of the AudioBuffer's ArrayBuffer have been detached, abort
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// these steps, and return a zero-length channel data buffers to the
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// invoker."
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for (uint32_t i = 0; i < mJSChannels.Length(); ++i) {
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JSObject* channelArray = mJSChannels[i];
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if (!channelArray || mLength != JS_GetTypedArrayLength(channelArray)) {
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// Either empty buffer or one of the arrays' buffers was detached.
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return nullptr;
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}
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}
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// "2. Detach all ArrayBuffers for arrays previously returned by
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// getChannelData on this AudioBuffer."
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// "3. Retain the underlying data buffers from those ArrayBuffers and return
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// references to them to the invoker."
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RefPtr<ThreadSharedFloatArrayBufferList> result =
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new ThreadSharedFloatArrayBufferList(mJSChannels.Length());
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for (uint32_t i = 0; i < mJSChannels.Length(); ++i) {
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JS::Rooted<JSObject*> arrayBufferView(aJSContext, mJSChannels[i]);
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bool isSharedMemory;
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JS::Rooted<JSObject*> arrayBuffer(aJSContext,
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JS_GetArrayBufferViewBuffer(aJSContext,
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arrayBufferView,
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&isSharedMemory));
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// The channel data arrays should all have originated in
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// RestoreJSChannelData, where they are created unshared.
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MOZ_ASSERT(!isSharedMemory);
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auto stolenData = arrayBuffer
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? static_cast<float*>(JS_StealArrayBufferContents(aJSContext,
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arrayBuffer))
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: nullptr;
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if (stolenData) {
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result->SetData(i, stolenData, js_free, stolenData);
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} else {
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NS_ASSERTION(i == 0, "some channels lost when contents not acquired");
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return nullptr;
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}
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}
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for (uint32_t i = 0; i < mJSChannels.Length(); ++i) {
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mJSChannels[i] = nullptr;
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}
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return result.forget();
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}
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ThreadSharedFloatArrayBufferList*
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AudioBuffer::GetThreadSharedChannelsForRate(JSContext* aJSContext)
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{
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if (!mSharedChannels) {
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mSharedChannels = StealJSArrayDataIntoSharedChannels(aJSContext);
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}
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return mSharedChannels;
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}
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size_t
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AudioBuffer::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const
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{
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size_t amount = aMallocSizeOf(this);
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amount += mJSChannels.ShallowSizeOfExcludingThis(aMallocSizeOf);
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if (mSharedChannels) {
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amount += mSharedChannels->SizeOfIncludingThis(aMallocSizeOf);
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}
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return amount;
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}
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} // namespace dom
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} // namespace mozilla
|
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