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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 "AudioNodeTrack.h"
#include "nsPrintfCString.h"
namespace mozilla {
namespace dom {
class ChannelMergerNodeEngine final : public AudioNodeEngine {
public:
explicit ChannelMergerNodeEngine(ChannelMergerNode* 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() == InputCount());
MOZ_ASSERT(aOutput.Length() == 1, "Should have only one output port");
// 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) {
mTrack =
AudioNodeTrack::Create(aContext, new ChannelMergerNodeEngine(this),
AudioNodeTrack::NO_TRACK_FLAGS, aContext->Graph());
}
/* static */
already_AddRefed<ChannelMergerNode> ChannelMergerNode::Create(
AudioContext& aAudioContext, const ChannelMergerOptions& aOptions,
ErrorResult& aRv) {
if (aOptions.mNumberOfInputs == 0 ||
aOptions.mNumberOfInputs > WebAudioUtils::MaxChannelCount) {
aRv.ThrowIndexSizeError(
nsPrintfCString("Number of inputs (%u) must be in the range [1, number "
"of supported channels]",
aOptions.mNumberOfInputs));
return nullptr;
}
RefPtr<ChannelMergerNode> audioNode =
new ChannelMergerNode(&aAudioContext, aOptions.mNumberOfInputs);
audioNode->Initialize(aOptions, aRv);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
return audioNode.forget();
}
JSObject* ChannelMergerNode::WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) {
return ChannelMergerNode_Binding::Wrap(aCx, this, aGivenProto);
}
} // namespace dom
} // namespace mozilla