151 lines
5 KiB
C++
151 lines
5 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 "AudioContext.h"
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#include "AudioNodeEngine.h"
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#include "AudioNodeTrack.h"
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#include "mozilla/dom/AudioParamBinding.h"
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namespace mozilla::dom {
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NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_CLASS(AudioParam)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(AudioParam)
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tmp->DisconnectFromGraphAndDestroyTrack();
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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_END
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NS_IMPL_CYCLE_COLLECTING_NATIVE_ADDREF(AudioParam)
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NS_IMPL_CYCLE_COLLECTING_NATIVE_RELEASE(AudioParam)
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AudioParam::AudioParam(AudioNode* aNode, uint32_t aIndex,
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const nsAString& aName, float aDefaultValue,
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float aMinValue, float aMaxValue)
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: AudioParamTimeline(aDefaultValue),
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mNode(aNode),
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mName(aName),
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mIndex(aIndex),
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mDefaultValue(aDefaultValue),
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mMinValue(aMinValue),
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mMaxValue(aMaxValue) {}
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AudioParam::~AudioParam() { DisconnectFromGraphAndDestroyTrack(); }
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JSObject* AudioParam::WrapObject(JSContext* aCx,
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JS::Handle<JSObject*> aGivenProto) {
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return AudioParam_Binding::Wrap(aCx, this, aGivenProto);
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}
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void AudioParam::DisconnectFromGraphAndDestroyTrack() {
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MOZ_ASSERT(mRefCnt.get() > mInputNodes.Length(),
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"Caller should be holding a reference or have called "
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"mRefCnt.stabilizeForDeletion()");
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while (!mInputNodes.IsEmpty()) {
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RefPtr<AudioNode> input = mInputNodes.PopLastElement().mInputNode;
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input->RemoveOutputParam(this);
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}
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if (mNodeTrackPort) {
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mNodeTrackPort->Destroy();
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mNodeTrackPort = nullptr;
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}
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if (mTrack) {
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mTrack->Destroy();
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mTrack = nullptr;
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}
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}
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mozilla::MediaTrack* AudioParam::GetTrack() const { return mTrack; }
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mozilla::MediaTrack* AudioParam::Track() {
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if (mTrack) {
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return mTrack;
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}
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AudioNodeEngine* engine = new AudioNodeEngine(nullptr);
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mTrack = AudioNodeTrack::Create(mNode->Context(), engine,
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AudioNodeTrack::NO_TRACK_FLAGS,
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mNode->Context()->Graph());
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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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mTrack->SetChannelMixingParametersImpl(1, ChannelCountMode::Explicit,
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ChannelInterpretation::Speakers);
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// Mark as an AudioParam helper track
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mTrack->SetAudioParamHelperTrack();
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// Setup the AudioParam's track as an input to the owner AudioNode's track
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AudioNodeTrack* nodeTrack = mNode->GetTrack();
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if (nodeTrack) {
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mNodeTrackPort = nodeTrack->AllocateInputPort(mTrack);
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}
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// Send the track to the timeline on the MTG side.
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AudioParamEvent event(mTrack);
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SendEventToEngine(event);
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return mTrack;
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}
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void AudioParam::SendEventToEngine(const AudioParamEvent& aEvent) {
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if (WEB_AUDIO_API_LOG_TEST()) {
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nsAutoCString params;
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if (aEvent.mType == AudioTimelineEvent::SetValueCurve) {
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params.AppendFmt("length={} time={:f} duration={:f}",
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aEvent.CurveLength(), aEvent.Time<double>(),
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aEvent.Duration());
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} else {
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params.AppendFmt("value={} time={:f}", aEvent.NominalValue(),
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aEvent.Time<double>());
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if (aEvent.mType == AudioTimelineEvent::SetTarget) {
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params.AppendFmt(" constant={}", aEvent.TimeConstant());
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}
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}
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WEB_AUDIO_API_LOG("%f: %s for %u %s %s", GetParentObject()->CurrentTime(),
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NS_ConvertUTF16toUTF8(mName).get(), ParentNodeId(),
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AudioTimelineEvent::EnumValueToString(aEvent.mType),
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params.get());
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}
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AudioNodeTrack* track = mNode->GetTrack();
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if (track) {
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track->SendTimelineEvent(mIndex, aEvent);
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}
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}
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void AudioParam::CleanupOldEvents() {
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MOZ_ASSERT(NS_IsMainThread());
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double currentTime = mNode->Context()->CurrentTime();
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CleanupEventsOlderThan(currentTime);
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}
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float AudioParamTimeline::AudioNodeInputValue(size_t aCounter) const {
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MOZ_ASSERT(mTrack);
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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 = mTrack->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 mozilla::dom
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