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804b8b8883
# skip-blame Differential Revision: https://phabricator.services.mozilla.com/D12251 --HG-- extra : moz-landing-system : lando
104 lines
3.6 KiB
C++
104 lines
3.6 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:set ts=2 sw=2 sts=2 et cindent: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/dom/ChannelSplitterNode.h"
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#include "mozilla/dom/ChannelSplitterNodeBinding.h"
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#include "AudioNodeEngine.h"
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#include "AudioNodeStream.h"
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namespace mozilla {
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namespace dom {
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class ChannelSplitterNodeEngine final : public AudioNodeEngine {
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public:
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explicit ChannelSplitterNodeEngine(ChannelSplitterNode* aNode)
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: AudioNodeEngine(aNode) {
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MOZ_ASSERT(NS_IsMainThread());
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}
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void ProcessBlocksOnPorts(AudioNodeStream* aStream,
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const OutputChunks& aInput, OutputChunks& aOutput,
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bool* aFinished) override {
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MOZ_ASSERT(aInput.Length() == 1, "Should only have one input port");
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aOutput.SetLength(OutputCount());
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for (uint16_t i = 0; i < OutputCount(); ++i) {
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if (i < aInput[0].ChannelCount()) {
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// Split out existing channels
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aOutput[i].AllocateChannels(1);
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AudioBlockCopyChannelWithScale(
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static_cast<const float*>(aInput[0].mChannelData[i]),
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aInput[0].mVolume, aOutput[i].ChannelFloatsForWrite(0));
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} else {
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// Pad with silent channels if needed
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aOutput[i].SetNull(WEBAUDIO_BLOCK_SIZE);
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}
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}
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}
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size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const override {
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return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
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}
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};
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ChannelSplitterNode::ChannelSplitterNode(AudioContext* aContext,
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uint16_t aOutputCount)
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: AudioNode(aContext, aOutputCount, ChannelCountMode::Explicit,
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ChannelInterpretation::Discrete),
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mOutputCount(aOutputCount) {
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mStream = AudioNodeStream::Create(
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aContext, new ChannelSplitterNodeEngine(this),
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AudioNodeStream::NO_STREAM_FLAGS, aContext->Graph());
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}
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/* static */ already_AddRefed<ChannelSplitterNode> ChannelSplitterNode::Create(
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AudioContext& aAudioContext, const ChannelSplitterOptions& aOptions,
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ErrorResult& aRv) {
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if (aAudioContext.CheckClosed(aRv)) {
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return nullptr;
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}
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if (aOptions.mNumberOfOutputs == 0 ||
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aOptions.mNumberOfOutputs > WebAudioUtils::MaxChannelCount) {
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aRv.Throw(NS_ERROR_DOM_INDEX_SIZE_ERR);
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return nullptr;
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}
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RefPtr<ChannelSplitterNode> audioNode =
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new ChannelSplitterNode(&aAudioContext, aOptions.mNumberOfOutputs);
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// Manually check that the other options are valid, this node has
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// channelCount, channelCountMode and channelInterpretation constraints: they
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// cannot be changed from the default.
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if (aOptions.mChannelCount.WasPassed() &&
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aOptions.mChannelCount.Value() != audioNode->ChannelCount()) {
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aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
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return nullptr;
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}
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if (aOptions.mChannelInterpretation.WasPassed() &&
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aOptions.mChannelInterpretation.Value() !=
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audioNode->ChannelInterpretationValue()) {
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aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
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return nullptr;
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}
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if (aOptions.mChannelCountMode.WasPassed() &&
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aOptions.mChannelCountMode.Value() !=
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audioNode->ChannelCountModeValue()) {
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aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
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return nullptr;
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}
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return audioNode.forget();
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}
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JSObject* ChannelSplitterNode::WrapObject(JSContext* aCx,
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JS::Handle<JSObject*> aGivenProto) {
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return ChannelSplitterNode_Binding::Wrap(aCx, this, aGivenProto);
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}
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} // namespace dom
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} // namespace mozilla
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