mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-23 12:51:06 +00:00
101 lines
3.4 KiB
C++
101 lines
3.4 KiB
C++
/* -*- 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"
|
|
#include "Tracing.h"
|
|
|
|
namespace mozilla::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");
|
|
TRACE("ChannelMergerNodeEngine::ProcessBlocksOnPorts");
|
|
|
|
// 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 mozilla::dom
|