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03a1803261
Backed out changeset 277c1f8098d1 (bug 1170958) Backed out changeset aa86bb9eea95 (bug 1170958) Backed out changeset 8af8b85a4b26 (bug 1170958) Backed out changeset ec1bf225e9cb (bug 1170958) Backed out changeset 4a04ddca2b6b (bug 1170958) Backed out changeset e85c9977a311 (bug 1170958) Backed out changeset 16b40ff04e8f (bug 1170958) Backed out changeset ad206925c84a (bug 1170958) Backed out changeset 2106eccec79b (bug 1170958)
152 lines
4.3 KiB
C++
152 lines
4.3 KiB
C++
/* -*- 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 "AudioParam.h"
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#include "mozilla/dom/AudioParamBinding.h"
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#include "AudioNodeEngine.h"
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#include "AudioNodeStream.h"
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#include "AudioContext.h"
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namespace mozilla {
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namespace dom {
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NS_IMPL_CYCLE_COLLECTION_CLASS(AudioParam)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(AudioParam)
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tmp->DisconnectFromGraphAndDestroyStream();
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NS_IMPL_CYCLE_COLLECTION_UNLINK(mNode)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER
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NS_IMPL_CYCLE_COLLECTION_UNLINK_END
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(AudioParam)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mNode)
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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_WRAPPERCACHE(AudioParam)
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NS_IMPL_CYCLE_COLLECTING_NATIVE_ADDREF(AudioParam)
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NS_IMETHODIMP_(MozExternalRefCountType)
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AudioParam::Release()
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{
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if (mRefCnt.get() == 1) {
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// We are about to be deleted, disconnect the object from the graph before
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// the derived type is destroyed.
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DisconnectFromGraphAndDestroyStream();
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}
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NS_IMPL_CC_NATIVE_RELEASE_BODY(AudioParam)
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}
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NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(AudioParam, AddRef)
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NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(AudioParam, Release)
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AudioParam::AudioParam(AudioNode* aNode,
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AudioParam::CallbackType aCallback,
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float aDefaultValue,
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const char* aName)
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: AudioParamTimeline(aDefaultValue)
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, mNode(aNode)
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, mCallback(aCallback)
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, mDefaultValue(aDefaultValue)
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, mName(aName)
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{
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}
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AudioParam::~AudioParam()
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{
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MOZ_ASSERT(mInputNodes.IsEmpty());
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}
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JSObject*
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AudioParam::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
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{
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return AudioParamBinding::Wrap(aCx, this, aGivenProto);
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}
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void
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AudioParam::DisconnectFromGraphAndDestroyStream()
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{
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// Addref this temporarily so the refcount bumping below doesn't destroy us
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// prematurely
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nsRefPtr<AudioParam> kungFuDeathGrip = this;
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while (!mInputNodes.IsEmpty()) {
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uint32_t i = mInputNodes.Length() - 1;
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nsRefPtr<AudioNode> input = mInputNodes[i].mInputNode;
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mInputNodes.RemoveElementAt(i);
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input->RemoveOutputParam(this);
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}
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if (mNodeStreamPort) {
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mNodeStreamPort->Destroy();
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mNodeStreamPort = nullptr;
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}
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if (mStream) {
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mStream->Destroy();
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mStream = nullptr;
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}
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}
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MediaStream*
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AudioParam::Stream()
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{
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if (mStream) {
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return mStream;
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}
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AudioNodeEngine* engine = new AudioNodeEngine(nullptr);
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nsRefPtr<AudioNodeStream> stream =
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AudioNodeStream::Create(mNode->Context(), engine,
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AudioNodeStream::NO_STREAM_FLAGS);
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// Force the input to have only one channel, and make it down-mix using
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// the speaker rules if needed.
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stream->SetChannelMixingParametersImpl(1, ChannelCountMode::Explicit, ChannelInterpretation::Speakers);
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// Mark as an AudioParam helper stream
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stream->SetAudioParamHelperStream();
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mStream = stream.forget();
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// Setup the AudioParam's stream as an input to the owner AudioNode's stream
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AudioNodeStream* nodeStream = mNode->GetStream();
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if (nodeStream) {
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mNodeStreamPort = nodeStream->AllocateInputPort(mStream);
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}
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// Send the stream to the timeline on the MSG side.
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AudioTimelineEvent event(mStream);
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mCallback(mNode, event);
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return mStream;
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}
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float
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AudioParamTimeline::AudioNodeInputValue(size_t aCounter) const
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{
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MOZ_ASSERT(mStream);
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// If we have a chunk produced by the AudioNode inputs to the AudioParam,
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// get its value now. We use aCounter to tell us which frame of the last
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// AudioChunk to look at.
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float audioNodeInputValue = 0.0f;
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const AudioBlock& lastAudioNodeChunk =
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static_cast<AudioNodeStream*>(mStream.get())->LastChunks()[0];
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if (!lastAudioNodeChunk.IsNull()) {
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MOZ_ASSERT(lastAudioNodeChunk.GetDuration() == WEBAUDIO_BLOCK_SIZE);
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audioNodeInputValue =
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static_cast<const float*>(lastAudioNodeChunk.mChannelData[0])[aCounter];
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audioNodeInputValue *= lastAudioNodeChunk.mVolume;
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}
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return audioNodeInputValue;
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}
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} // namespace dom
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} // namespace mozilla
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