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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 "AudioNodeStream.h"
namespace mozilla {
namespace dom {
NS_IMPL_ISUPPORTS_INHERITED0(ChannelSplitterNode, AudioNode)
class ChannelSplitterNodeEngine final : public AudioNodeEngine
{
public:
explicit ChannelSplitterNodeEngine(ChannelSplitterNode* aNode)
: AudioNodeEngine(aNode)
{
MOZ_ASSERT(NS_IsMainThread());
}
void ProcessBlocksOnPorts(AudioNodeStream* aStream,
const OutputChunks& aInput,
OutputChunks& aOutput,
bool* aFinished) override
{
MOZ_ASSERT(aInput.Length() == 1, "Should only have one input port");
aOutput.SetLength(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,
2,
ChannelCountMode::Max,
ChannelInterpretation::Speakers)
, mOutputCount(aOutputCount)
{
mStream = AudioNodeStream::Create(aContext,
new ChannelSplitterNodeEngine(this),
AudioNodeStream::NO_STREAM_FLAGS,
aContext->Graph());
}
ChannelSplitterNode::~ChannelSplitterNode()
{
}
JSObject*
ChannelSplitterNode::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
{
return ChannelSplitterNodeBinding::Wrap(aCx, this, aGivenProto);
}
} // namespace dom
} // namespace mozilla
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