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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 "mozilla/dom/ChannelSplitterNode.h"
#include "mozilla/dom/ChannelSplitterNodeBinding.h"
#include "AudioNodeEngine.h"
#include "AudioNodeTrack.h"
namespace mozilla {
namespace dom {
class ChannelSplitterNodeEngine final : public AudioNodeEngine {
public:
explicit ChannelSplitterNodeEngine(ChannelSplitterNode* aNode)
: AudioNodeEngine(aNode) {
MOZ_ASSERT(NS_IsMainThread());
}
void ProcessBlocksOnPorts(AudioNodeTrack* aTrack, GraphTime aFrom,
Span<const AudioBlock> aInput,
Span<AudioBlock> aOutput,
bool* aFinished) override {
MOZ_ASSERT(aInput.Length() == 1, "Should only have one input port");
MOZ_ASSERT(aOutput.Length() == OutputCount());
for (uint16_t i = 0; i < OutputCount(); ++i) {
if (i < aInput[0].ChannelCount()) {
// Split out existing channels
aOutput[i].AllocateChannels(1);
AudioBlockCopyChannelWithScale(
static_cast<const float*>(aInput[0].mChannelData[i]),
aInput[0].mVolume, aOutput[i].ChannelFloatsForWrite(0));
} else {
// Pad with silent channels if needed
aOutput[i].SetNull(WEBAUDIO_BLOCK_SIZE);
}
}
}
size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const override {
return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
}
};
ChannelSplitterNode::ChannelSplitterNode(AudioContext* aContext,
uint16_t aOutputCount)
: AudioNode(aContext, aOutputCount, ChannelCountMode::Explicit,
ChannelInterpretation::Discrete),
mOutputCount(aOutputCount) {
mTrack =
AudioNodeTrack::Create(aContext, new ChannelSplitterNodeEngine(this),
AudioNodeTrack::NO_TRACK_FLAGS, aContext->Graph());
}
/* static */
already_AddRefed<ChannelSplitterNode> ChannelSplitterNode::Create(
AudioContext& aAudioContext, const ChannelSplitterOptions& aOptions,
ErrorResult& aRv) {
if (aOptions.mNumberOfOutputs == 0 ||
aOptions.mNumberOfOutputs > WebAudioUtils::MaxChannelCount) {
aRv.ThrowIndexSizeError(nsPrintfCString(
"%u is not a valid number of outputs", aOptions.mNumberOfOutputs));
return nullptr;
}
RefPtr<ChannelSplitterNode> audioNode =
new ChannelSplitterNode(&aAudioContext, aOptions.mNumberOfOutputs);
// Manually check that the other options are valid, this node has
// channelCount, channelCountMode and channelInterpretation constraints: they
// cannot be changed from the default.
if (aOptions.mChannelCount.WasPassed()) {
audioNode->SetChannelCount(aOptions.mChannelCount.Value(), aRv);
if (aRv.Failed()) {
return nullptr;
}
}
if (aOptions.mChannelInterpretation.WasPassed()) {
audioNode->SetChannelInterpretationValue(
aOptions.mChannelInterpretation.Value(), aRv);
if (aRv.Failed()) {
return nullptr;
}
}
if (aOptions.mChannelCountMode.WasPassed()) {
audioNode->SetChannelCountModeValue(aOptions.mChannelCountMode.Value(),
aRv);
if (aRv.Failed()) {
return nullptr;
}
}
return audioNode.forget();
}
JSObject* ChannelSplitterNode::WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) {
return ChannelSplitterNode_Binding::Wrap(aCx, this, aGivenProto);
}
} // namespace dom
} // namespace mozilla