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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 "AudioNodeStream.h"
#include "AudioContext.h"
namespace mozilla {
namespace dom {
NS_IMPL_CYCLE_COLLECTION_CLASS(AudioParam)
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(AudioParam)
tmp->DisconnectFromGraphAndDestroyStream();
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_COLLECTION_TRACE_WRAPPERCACHE(AudioParam)
NS_IMPL_CYCLE_COLLECTING_NATIVE_ADDREF(AudioParam)
NS_IMPL_CYCLE_COLLECTING_NATIVE_RELEASE(AudioParam)
NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(AudioParam, AddRef)
NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(AudioParam, Release)
AudioParam::AudioParam(AudioNode* aNode,
uint32_t aIndex,
float aDefaultValue,
const char* aName)
: AudioParamTimeline(aDefaultValue)
, mNode(aNode)
, mName(aName)
, mIndex(aIndex)
, mDefaultValue(aDefaultValue)
{
}
AudioParam::~AudioParam()
{
DisconnectFromGraphAndDestroyStream();
}
JSObject*
AudioParam::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
{
return AudioParamBinding::Wrap(aCx, this, aGivenProto);
}
void
AudioParam::DisconnectFromGraphAndDestroyStream()
{
MOZ_ASSERT(mRefCnt.get() > mInputNodes.Length(),
"Caller should be holding a reference or have called "
"mRefCnt.stabilizeForDeletion()");
while (!mInputNodes.IsEmpty()) {
uint32_t i = mInputNodes.Length() - 1;
RefPtr<AudioNode> input = mInputNodes[i].mInputNode;
mInputNodes.RemoveElementAt(i);
input->RemoveOutputParam(this);
}
if (mNodeStreamPort) {
mNodeStreamPort->Destroy();
mNodeStreamPort = nullptr;
}
if (mStream) {
mStream->Destroy();
mStream = nullptr;
}
}
MediaStream*
AudioParam::Stream()
{
if (mStream) {
return mStream;
}
AudioNodeEngine* engine = new AudioNodeEngine(nullptr);
RefPtr<AudioNodeStream> stream =
AudioNodeStream::Create(mNode->Context(), engine,
AudioNodeStream::NO_STREAM_FLAGS,
mNode->Context()->Graph());
// Force the input to have only one channel, and make it down-mix using
// the speaker rules if needed.
stream->SetChannelMixingParametersImpl(1, ChannelCountMode::Explicit, ChannelInterpretation::Speakers);
// Mark as an AudioParam helper stream
stream->SetAudioParamHelperStream();
mStream = stream.forget();
// Setup the AudioParam's stream as an input to the owner AudioNode's stream
AudioNodeStream* nodeStream = mNode->GetStream();
if (nodeStream) {
mNodeStreamPort =
nodeStream->AllocateInputPort(mStream, AudioNodeStream::AUDIO_TRACK);
}
// Send the stream to the timeline on the MSG side.
AudioTimelineEvent event(mStream);
SendEventToEngine(event);
return mStream;
}
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::Stream:
return "Stream";
case AudioTimelineEvent::Cancel:
return "Cancel";
default:
return "unknown AudioTimelineEvent";
}
}
void
AudioParam::SendEventToEngine(const AudioTimelineEvent& aEvent)
{
WEB_AUDIO_API_LOG("%f: %s for %u %s %s=%g time=%f %s=%g",
GetParentObject()->CurrentTime(),
mName, ParentNodeId(), ToString(aEvent.mType),
aEvent.mType == AudioTimelineEvent::SetValueCurve ?
"length" : "value",
aEvent.mType == AudioTimelineEvent::SetValueCurve ?
static_cast<double>(aEvent.mCurveLength) :
static_cast<double>(aEvent.mValue),
aEvent.Time<double>(),
aEvent.mType == AudioTimelineEvent::SetValueCurve ?
"duration" : "constant",
aEvent.mType == AudioTimelineEvent::SetValueCurve ?
aEvent.mDuration : aEvent.mTimeConstant);
AudioNodeStream* stream = mNode->GetStream();
if (stream) {
stream->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(mStream);
// 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 =
static_cast<AudioNodeStream*>(mStream.get())->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 dom
} // namespace mozilla
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