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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "AudioParam.h"
#include "mozilla/dom/AudioParamBinding.h"
#include "AudioNodeEngine.h"
#include "AudioNodeTrack.h"
#include "AudioContext.h"
namespace mozilla::dom {
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_CLASS(AudioParam)
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(AudioParam)
tmp->DisconnectFromGraphAndDestroyTrack();
NS_IMPL_CYCLE_COLLECTION_UNLINK(mNode)
NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(AudioParam)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mNode)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTING_NATIVE_ADDREF(AudioParam)
NS_IMPL_CYCLE_COLLECTING_NATIVE_RELEASE(AudioParam)
AudioParam::AudioParam(AudioNode* aNode, uint32_t aIndex,
const nsAString& aName, float aDefaultValue,
float aMinValue, float aMaxValue)
: AudioParamTimeline(aDefaultValue),
mNode(aNode),
mName(aName),
mIndex(aIndex),
mDefaultValue(aDefaultValue),
mMinValue(aMinValue),
mMaxValue(aMaxValue) {}
AudioParam::~AudioParam() { DisconnectFromGraphAndDestroyTrack(); }
JSObject* AudioParam::WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) {
return AudioParam_Binding::Wrap(aCx, this, aGivenProto);
}
void AudioParam::DisconnectFromGraphAndDestroyTrack() {
MOZ_ASSERT(mRefCnt.get() > mInputNodes.Length(),
"Caller should be holding a reference or have called "
"mRefCnt.stabilizeForDeletion()");
while (!mInputNodes.IsEmpty()) {
RefPtr<AudioNode> input = mInputNodes.PopLastElement().mInputNode;
input->RemoveOutputParam(this);
}
if (mNodeTrackPort) {
mNodeTrackPort->Destroy();
mNodeTrackPort = nullptr;
}
if (mTrack) {
mTrack->Destroy();
mTrack = nullptr;
}
}
mozilla::MediaTrack* AudioParam::GetTrack() const { return mTrack; }
mozilla::MediaTrack* AudioParam::Track() {
if (mTrack) {
return mTrack;
}
AudioNodeEngine* engine = new AudioNodeEngine(nullptr);
mTrack = AudioNodeTrack::Create(mNode->Context(), engine,
AudioNodeTrack::NO_TRACK_FLAGS,
mNode->Context()->Graph());
// Force the input to have only one channel, and make it down-mix using
// the speaker rules if needed.
mTrack->SetChannelMixingParametersImpl(1, ChannelCountMode::Explicit,
ChannelInterpretation::Speakers);
// Mark as an AudioParam helper track
mTrack->SetAudioParamHelperTrack();
// Setup the AudioParam's track as an input to the owner AudioNode's track
AudioNodeTrack* nodeTrack = mNode->GetTrack();
if (nodeTrack) {
mNodeTrackPort = nodeTrack->AllocateInputPort(mTrack);
}
// Send the track to the timeline on the MTG side.
AudioParamEvent event(mTrack);
SendEventToEngine(event);
return mTrack;
}
static const char* ToString(AudioTimelineEvent::Type aType) {
switch (aType) {
case AudioTimelineEvent::SetValue:
return "SetValue";
case AudioTimelineEvent::SetValueAtTime:
return "SetValueAtTime";
case AudioTimelineEvent::LinearRamp:
return "LinearRamp";
case AudioTimelineEvent::ExponentialRamp:
return "ExponentialRamp";
case AudioTimelineEvent::SetTarget:
return "SetTarget";
case AudioTimelineEvent::SetValueCurve:
return "SetValueCurve";
case AudioTimelineEvent::Track:
return "Track";
case AudioTimelineEvent::Cancel:
return "Cancel";
default:
return "unknown AudioTimelineEvent";
}
}
void AudioParam::SendEventToEngine(const AudioParamEvent& aEvent) {
WEB_AUDIO_API_LOG(
"%f: %s for %u %s %s=%g time=%f %s=%g", GetParentObject()->CurrentTime(),
NS_ConvertUTF16toUTF8(mName).get(), ParentNodeId(),
ToString(aEvent.mType),
aEvent.mType == AudioTimelineEvent::SetValueCurve ? "length" : "value",
aEvent.mType == AudioTimelineEvent::SetValueCurve
? static_cast<double>(aEvent.CurveLength())
: static_cast<double>(aEvent.NominalValue()),
aEvent.Time<double>(),
aEvent.mType == AudioTimelineEvent::SetValueCurve ? "duration"
: "constant",
aEvent.mType == AudioTimelineEvent::SetValueCurve
? aEvent.Duration()
: aEvent.TimeConstant());
AudioNodeTrack* track = mNode->GetTrack();
if (track) {
track->SendTimelineEvent(mIndex, aEvent);
}
}
void AudioParam::CleanupOldEvents() {
MOZ_ASSERT(NS_IsMainThread());
double currentTime = mNode->Context()->CurrentTime();
CleanupEventsOlderThan(currentTime);
}
float AudioParamTimeline::AudioNodeInputValue(size_t aCounter) const {
MOZ_ASSERT(mTrack);
// If we have a chunk produced by the AudioNode inputs to the AudioParam,
// get its value now. We use aCounter to tell us which frame of the last
// AudioChunk to look at.
float audioNodeInputValue = 0.0f;
const AudioBlock& lastAudioNodeChunk = mTrack->LastChunks()[0];
if (!lastAudioNodeChunk.IsNull()) {
MOZ_ASSERT(lastAudioNodeChunk.GetDuration() == WEBAUDIO_BLOCK_SIZE);
audioNodeInputValue =
static_cast<const float*>(lastAudioNodeChunk.mChannelData[0])[aCounter];
audioNodeInputValue *= lastAudioNodeChunk.mVolume;
}
return audioNodeInputValue;
}
} // namespace mozilla::dom
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