The Tor Browser / file comparison
comparison: content/media/webaudio/ChannelMergerNode.cpp
content/media/webaudio/ChannelMergerNode.cpp
- branch
- TOR_BUG_9701
- changeset 13
- 44a2da4a2ab2
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| -1:000000000000 | 0:8fe566a962bd |
|---|---|
| 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* vim:set ts=2 sw=2 sts=2 et cindent: */ | |
| 3 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 4 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 6 | |
| 7 #include "mozilla/dom/ChannelMergerNode.h" | |
| 8 #include "mozilla/dom/ChannelMergerNodeBinding.h" | |
| 9 #include "AudioNodeEngine.h" | |
| 10 #include "AudioNodeStream.h" | |
| 11 | |
| 12 namespace mozilla { | |
| 13 namespace dom { | |
| 14 | |
| 15 NS_IMPL_ISUPPORTS_INHERITED0(ChannelMergerNode, AudioNode) | |
| 16 | |
| 17 class ChannelMergerNodeEngine : public AudioNodeEngine | |
| 18 { | |
| 19 public: | |
| 20 ChannelMergerNodeEngine(ChannelMergerNode* aNode) | |
| 21 : AudioNodeEngine(aNode) | |
| 22 { | |
| 23 MOZ_ASSERT(NS_IsMainThread()); | |
| 24 } | |
| 25 | |
| 26 virtual void ProcessBlocksOnPorts(AudioNodeStream* aStream, | |
| 27 const OutputChunks& aInput, | |
| 28 OutputChunks& aOutput, | |
| 29 bool* aFinished) MOZ_OVERRIDE | |
| 30 { | |
| 31 MOZ_ASSERT(aInput.Length() >= 1, "Should have one or more input ports"); | |
| 32 | |
| 33 // Get the number of output channels, and allocate it | |
| 34 uint32_t channelCount = 0; | |
| 35 for (uint16_t i = 0; i < InputCount(); ++i) { | |
| 36 channelCount += aInput[i].mChannelData.Length(); | |
| 37 } | |
| 38 if (channelCount == 0) { | |
| 39 aOutput[0].SetNull(WEBAUDIO_BLOCK_SIZE); | |
| 40 return; | |
| 41 } | |
| 42 channelCount = std::min(channelCount, WebAudioUtils::MaxChannelCount); | |
| 43 AllocateAudioBlock(channelCount, &aOutput[0]); | |
| 44 | |
| 45 // Append each channel in each input to the output | |
| 46 uint32_t channelIndex = 0; | |
| 47 for (uint16_t i = 0; true; ++i) { | |
| 48 MOZ_ASSERT(i < InputCount()); | |
| 49 for (uint32_t j = 0; j < aInput[i].mChannelData.Length(); ++j) { | |
| 50 AudioBlockCopyChannelWithScale( | |
| 51 static_cast<const float*>(aInput[i].mChannelData[j]), | |
| 52 aInput[i].mVolume, | |
| 53 static_cast<float*>(const_cast<void*>(aOutput[0].mChannelData[channelIndex]))); | |
| 54 ++channelIndex; | |
| 55 if (channelIndex >= channelCount) { | |
| 56 return; | |
| 57 } | |
| 58 } | |
| 59 } | |
| 60 } | |
| 61 | |
| 62 virtual size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const MOZ_OVERRIDE | |
| 63 { | |
| 64 return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf); | |
| 65 } | |
| 66 }; | |
| 67 | |
| 68 ChannelMergerNode::ChannelMergerNode(AudioContext* aContext, | |
| 69 uint16_t aInputCount) | |
| 70 : AudioNode(aContext, | |
| 71 2, | |
| 72 ChannelCountMode::Max, | |
| 73 ChannelInterpretation::Speakers) | |
| 74 , mInputCount(aInputCount) | |
| 75 { | |
| 76 mStream = aContext->Graph()->CreateAudioNodeStream(new ChannelMergerNodeEngine(this), | |
| 77 MediaStreamGraph::INTERNAL_STREAM); | |
| 78 } | |
| 79 | |
| 80 JSObject* | |
| 81 ChannelMergerNode::WrapObject(JSContext* aCx) | |
| 82 { | |
| 83 return ChannelMergerNodeBinding::Wrap(aCx, this); | |
| 84 } | |
| 85 | |
| 86 } | |
| 87 } | |
| 88 |
