mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-07 04:05:49 +00:00
80 lines
2.4 KiB
C++
80 lines
2.4 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/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 : public AudioNodeEngine
|
|
{
|
|
public:
|
|
explicit ChannelSplitterNodeEngine(ChannelSplitterNode* aNode)
|
|
: AudioNodeEngine(aNode)
|
|
{
|
|
MOZ_ASSERT(NS_IsMainThread());
|
|
}
|
|
|
|
virtual void ProcessBlocksOnPorts(AudioNodeStream* aStream,
|
|
const OutputChunks& aInput,
|
|
OutputChunks& aOutput,
|
|
bool* aFinished) MOZ_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].mChannelData.Length()) {
|
|
// Split out existing channels
|
|
AllocateAudioBlock(1, &aOutput[i]);
|
|
AudioBlockCopyChannelWithScale(
|
|
static_cast<const float*>(aInput[0].mChannelData[i]),
|
|
aInput[0].mVolume,
|
|
static_cast<float*>(const_cast<void*>(aOutput[i].mChannelData[0])));
|
|
} else {
|
|
// Pad with silent channels if needed
|
|
aOutput[i].SetNull(WEBAUDIO_BLOCK_SIZE);
|
|
}
|
|
}
|
|
}
|
|
|
|
virtual size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const MOZ_OVERRIDE
|
|
{
|
|
return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
|
|
}
|
|
};
|
|
|
|
ChannelSplitterNode::ChannelSplitterNode(AudioContext* aContext,
|
|
uint16_t aOutputCount)
|
|
: AudioNode(aContext,
|
|
2,
|
|
ChannelCountMode::Max,
|
|
ChannelInterpretation::Speakers)
|
|
, mOutputCount(aOutputCount)
|
|
{
|
|
mStream = aContext->Graph()->CreateAudioNodeStream(new ChannelSplitterNodeEngine(this),
|
|
MediaStreamGraph::INTERNAL_STREAM);
|
|
}
|
|
|
|
ChannelSplitterNode::~ChannelSplitterNode()
|
|
{
|
|
}
|
|
|
|
JSObject*
|
|
ChannelSplitterNode::WrapObject(JSContext* aCx)
|
|
{
|
|
return ChannelSplitterNodeBinding::Wrap(aCx, this);
|
|
}
|
|
|
|
}
|
|
}
|
|
|