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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/ChannelMergerNode.h"
#include "mozilla/dom/ChannelMergerNodeBinding.h"
#include "AudioNodeEngine.h"
#include "AudioNodeStream.h"
namespace mozilla {
namespace dom {
NS_IMPL_ISUPPORTS_INHERITED0(ChannelMergerNode, AudioNode)
class ChannelMergerNodeEngine final : public AudioNodeEngine
{
public:
explicit ChannelMergerNodeEngine(ChannelMergerNode* 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 have one or more input ports");
// Get the number of output channels, and allocate it
size_t channelCount = InputCount();
bool allNull = true;
for (size_t i = 0; i < channelCount; ++i) {
allNull &= aInput[i].IsNull();
}
if (allNull) {
aOutput[0].SetNull(WEBAUDIO_BLOCK_SIZE);
return;
}
aOutput[0].AllocateChannels(channelCount);
for (size_t i = 0; i < channelCount; ++i) {
float* output = aOutput[0].ChannelFloatsForWrite(i);
if (aInput[i].IsNull()) {
PodZero(output, WEBAUDIO_BLOCK_SIZE);
} else {
AudioBlockCopyChannelWithScale(
static_cast<const float*>(aInput[i].mChannelData[0]),
aInput[i].mVolume, output);
}
}
}
size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const override
{
return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
}
};
ChannelMergerNode::ChannelMergerNode(AudioContext* aContext,
uint16_t aInputCount)
: AudioNode(aContext,
1,
ChannelCountMode::Explicit,
ChannelInterpretation::Speakers)
, mInputCount(aInputCount)
{
mStream = AudioNodeStream::Create(aContext,
new ChannelMergerNodeEngine(this),
AudioNodeStream::NO_STREAM_FLAGS,
aContext->Graph());
}
ChannelMergerNode::~ChannelMergerNode()
{
}
JSObject*
ChannelMergerNode::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
{
return ChannelMergerNodeBinding::Wrap(aCx, this, aGivenProto);
}
} // namespace dom
} // namespace mozilla
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