зеркало из https://github.com/mozilla/gecko-dev.git
Bug 1156472 - Part 13 - Make necessary adjustments for integer audio. r=jesup
This commit is contained in:
Paul Adenot
Родитель
67ca74db0b
Коммит
90a222f71a
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@ -0,0 +1,133 @@
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-*/
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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 file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "MediaStreamGraphImpl.h"
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#include "mozilla/MathAlgorithms.h"
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#include "mozilla/unused.h"
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#include "AudioSegment.h"
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#include "mozilla/Logging.h"
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#include "mozilla/Attributes.h"
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#include "AudioCaptureStream.h"
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#include "ImageContainer.h"
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#include "AudioNodeEngine.h"
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#include "AudioNodeStream.h"
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#include "AudioNodeExternalInputStream.h"
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#include "webaudio/MediaStreamAudioDestinationNode.h"
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#include <algorithm>
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#include "DOMMediaStream.h"
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using namespace mozilla::layers;
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using namespace mozilla::dom;
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using namespace mozilla::gfx;
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namespace mozilla
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{
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// We are mixing to mono until PeerConnection can accept stereo
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static const uint32_t MONO = 1;
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AudioCaptureStream::AudioCaptureStream(DOMMediaStream* aWrapper)
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: ProcessedMediaStream(aWrapper), mTrackCreated(false)
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{
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MOZ_ASSERT(NS_IsMainThread());
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MOZ_COUNT_CTOR(AudioCaptureStream);
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mMixer.AddCallback(this);
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}
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AudioCaptureStream::~AudioCaptureStream()
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{
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MOZ_COUNT_DTOR(AudioCaptureStream);
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mMixer.RemoveCallback(this);
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}
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void
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AudioCaptureStream::ProcessInput(GraphTime aFrom, GraphTime aTo,
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uint32_t aFlags)
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{
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uint32_t inputCount = mInputs.Length();
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StreamBuffer::Track* track = EnsureTrack(AUDIO_TRACK);
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// Notify the DOM everything is in order.
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if (!mTrackCreated) {
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for (uint32_t i = 0; i < mListeners.Length(); i++) {
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MediaStreamListener* l = mListeners[i];
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AudioSegment tmp;
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l->NotifyQueuedTrackChanges(
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Graph(), AUDIO_TRACK, 0, MediaStreamListener::TRACK_EVENT_CREATED, tmp);
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l->NotifyFinishedTrackCreation(Graph());
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}
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mTrackCreated = true;
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}
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// If the captured stream is connected back to a object on the page (be it an
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// HTMLMediaElement with a stream as source, or an AudioContext), a cycle
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// situation occur. This can work if it's an AudioContext with at least one
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// DelayNode, but the MSG will mute the whole cycle otherwise.
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bool blocked = mFinished || mBlocked.GetAt(aFrom);
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if (blocked || InMutedCycle() || inputCount == 0) {
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track->Get<AudioSegment>()->AppendNullData(aTo - aFrom);
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} else {
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// We mix down all the tracks of all inputs, to a stereo track. Everything
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// is {up,down}-mixed to stereo.
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mMixer.StartMixing();
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AudioSegment output;
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for (uint32_t i = 0; i < inputCount; i++) {
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MediaStream* s = mInputs[i]->GetSource();
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StreamBuffer::TrackIter tracks(s->GetStreamBuffer(), MediaSegment::AUDIO);
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while (!tracks.IsEnded()) {
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AudioSegment* inputSegment = tracks->Get<AudioSegment>();
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StreamTime inputStart = s->GraphTimeToStreamTime(aFrom);
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StreamTime inputEnd = s->GraphTimeToStreamTime(aTo);
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AudioSegment toMix;
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toMix.AppendSlice(*inputSegment, inputStart, inputEnd);
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// Care for streams blocked in the [aTo, aFrom] range.
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if (inputEnd - inputStart < aTo - aFrom) {
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toMix.AppendNullData((aTo - aFrom) - (inputEnd - inputStart));
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}
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toMix.Mix(mMixer, MONO, Graph()->GraphRate());
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tracks.Next();
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}
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}
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// This calls MixerCallback below
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mMixer.FinishMixing();
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}
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// Regardless of the status of the input tracks, we go foward.
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mBuffer.AdvanceKnownTracksTime(GraphTimeToStreamTime((aTo)));
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}
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void
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AudioCaptureStream::MixerCallback(AudioDataValue* aMixedBuffer,
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AudioSampleFormat aFormat, uint32_t aChannels,
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uint32_t aFrames, uint32_t aSampleRate)
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{
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nsAutoTArray<nsTArray<AudioDataValue>, MONO> output;
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nsAutoTArray<const AudioDataValue*, MONO> bufferPtrs;
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output.SetLength(MONO);
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bufferPtrs.SetLength(MONO);
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uint32_t written = 0;
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// We need to copy here, because the mixer will reuse the storage, we should
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// not hold onto it. Buffers are in planar format.
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for (uint32_t channel = 0; channel < aChannels; channel++) {
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AudioDataValue* out = output[channel].AppendElements(aFrames);
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PodCopy(out, aMixedBuffer + written, aFrames);
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bufferPtrs[channel] = out;
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written += aFrames;
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}
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AudioChunk chunk;
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chunk.mBuffer = new mozilla::SharedChannelArrayBuffer<AudioDataValue>(&output);
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chunk.mDuration = aFrames;
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chunk.mBufferFormat = aFormat;
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chunk.mVolume = 1.0f;
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chunk.mChannelData.SetLength(MONO);
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for (uint32_t channel = 0; channel < aChannels; channel++) {
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chunk.mChannelData[channel] = bufferPtrs[channel];
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}
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// Now we have mixed data, simply append it to out track.
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EnsureTrack(AUDIO_TRACK)->Get<AudioSegment>()->AppendAndConsumeChunk(&chunk);
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}
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}
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@ -4,26 +4,11 @@
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "AudioChannelFormat.h"
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#include "nsTArray.h"
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#include <algorithm>
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namespace mozilla {
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enum {
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SURROUND_L,
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SURROUND_R,
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SURROUND_C,
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SURROUND_LFE,
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SURROUND_SL,
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SURROUND_SR
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};
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static const uint32_t CUSTOM_CHANNEL_LAYOUTS = 6;
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static const int IGNORE = CUSTOM_CHANNEL_LAYOUTS;
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static const float IGNORE_F = 0.0f;
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uint32_t
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GetAudioChannelsSuperset(uint32_t aChannels1, uint32_t aChannels2)
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{
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@ -63,9 +48,6 @@ gUpMixMatrices[CUSTOM_CHANNEL_LAYOUTS*(CUSTOM_CHANNEL_LAYOUTS - 1)/2] =
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{ { 0, 1, 2, 3, 4, IGNORE } }
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};
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static const int gMixingMatrixIndexByChannels[CUSTOM_CHANNEL_LAYOUTS - 1] =
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{ 0, 5, 9, 12, 14 };
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void
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AudioChannelsUpMix(nsTArray<const void*>* aChannelArray,
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uint32_t aOutputChannelCount,
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@ -108,94 +90,4 @@ AudioChannelsUpMix(nsTArray<const void*>* aChannelArray,
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}
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}
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/**
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* DownMixMatrix represents a conversion matrix efficiently by exploiting the
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* fact that each input channel contributes to at most one output channel,
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* except possibly for the C input channel in layouts that have one. Also,
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* every input channel is multiplied by the same coefficient for every output
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* channel it contributes to.
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*/
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struct DownMixMatrix {
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// Every input channel c is copied to output channel mInputDestination[c]
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// after multiplying by mInputCoefficient[c].
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uint8_t mInputDestination[CUSTOM_CHANNEL_LAYOUTS];
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// If not IGNORE, then the C channel is copied to this output channel after
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// multiplying by its coefficient.
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uint8_t mCExtraDestination;
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float mInputCoefficient[CUSTOM_CHANNEL_LAYOUTS];
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};
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static const DownMixMatrix
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gDownMixMatrices[CUSTOM_CHANNEL_LAYOUTS*(CUSTOM_CHANNEL_LAYOUTS - 1)/2] =
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{
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// Downmixes to mono
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{ { 0, 0 }, IGNORE, { 0.5f, 0.5f } },
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{ { 0, IGNORE, IGNORE }, IGNORE, { 1.0f, IGNORE_F, IGNORE_F } },
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{ { 0, 0, 0, 0 }, IGNORE, { 0.25f, 0.25f, 0.25f, 0.25f } },
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{ { 0, IGNORE, IGNORE, IGNORE, IGNORE }, IGNORE, { 1.0f, IGNORE_F, IGNORE_F, IGNORE_F, IGNORE_F } },
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{ { 0, 0, 0, IGNORE, 0, 0 }, IGNORE, { 0.7071f, 0.7071f, 1.0f, IGNORE_F, 0.5f, 0.5f } },
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// Downmixes to stereo
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{ { 0, 1, IGNORE }, IGNORE, { 1.0f, 1.0f, IGNORE_F } },
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{ { 0, 1, 0, 1 }, IGNORE, { 0.5f, 0.5f, 0.5f, 0.5f } },
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{ { 0, 1, IGNORE, IGNORE, IGNORE }, IGNORE, { 1.0f, 1.0f, IGNORE_F, IGNORE_F, IGNORE_F } },
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{ { 0, 1, 0, IGNORE, 0, 1 }, 1, { 1.0f, 1.0f, 0.7071f, IGNORE_F, 0.7071f, 0.7071f } },
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// Downmixes to 3-channel
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{ { 0, 1, 2, IGNORE }, IGNORE, { 1.0f, 1.0f, 1.0f, IGNORE_F } },
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{ { 0, 1, 2, IGNORE, IGNORE }, IGNORE, { 1.0f, 1.0f, 1.0f, IGNORE_F, IGNORE_F } },
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{ { 0, 1, 2, IGNORE, IGNORE, IGNORE }, IGNORE, { 1.0f, 1.0f, 1.0f, IGNORE_F, IGNORE_F, IGNORE_F } },
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// Downmixes to quad
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{ { 0, 1, 2, 3, IGNORE }, IGNORE, { 1.0f, 1.0f, 1.0f, 1.0f, IGNORE_F } },
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{ { 0, 1, 0, IGNORE, 2, 3 }, 1, { 1.0f, 1.0f, 0.7071f, IGNORE_F, 1.0f, 1.0f } },
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// Downmixes to 5-channel
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{ { 0, 1, 2, 3, 4, IGNORE }, IGNORE, { 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, IGNORE_F } }
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};
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void
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AudioChannelsDownMix(const nsTArray<const void*>& aChannelArray,
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float** aOutputChannels,
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uint32_t aOutputChannelCount,
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uint32_t aDuration)
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{
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uint32_t inputChannelCount = aChannelArray.Length();
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const void* const* inputChannels = aChannelArray.Elements();
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NS_ASSERTION(inputChannelCount > aOutputChannelCount, "Nothing to do");
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if (inputChannelCount > 6) {
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// Just drop the unknown channels.
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for (uint32_t o = 0; o < aOutputChannelCount; ++o) {
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memcpy(aOutputChannels[o], inputChannels[o], aDuration*sizeof(float));
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}
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return;
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}
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// Ignore unknown channels, they're just dropped.
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inputChannelCount = std::min<uint32_t>(6, inputChannelCount);
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const DownMixMatrix& m = gDownMixMatrices[
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gMixingMatrixIndexByChannels[aOutputChannelCount - 1] +
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inputChannelCount - aOutputChannelCount - 1];
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// This is slow, but general. We can define custom code for special
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// cases later.
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for (uint32_t s = 0; s < aDuration; ++s) {
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// Reserve an extra junk channel at the end for the cases where we
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// want an input channel to contribute to nothing
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float outputChannels[CUSTOM_CHANNEL_LAYOUTS + 1];
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memset(outputChannels, 0, sizeof(float)*(CUSTOM_CHANNEL_LAYOUTS));
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for (uint32_t c = 0; c < inputChannelCount; ++c) {
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outputChannels[m.mInputDestination[c]] +=
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m.mInputCoefficient[c]*(static_cast<const float*>(inputChannels[c]))[s];
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}
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// Utilize the fact that in every layout, C is the third channel.
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if (m.mCExtraDestination != IGNORE) {
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outputChannels[m.mCExtraDestination] +=
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m.mInputCoefficient[SURROUND_C]*(static_cast<const float*>(inputChannels[SURROUND_C]))[s];
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}
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for (uint32_t c = 0; c < aOutputChannelCount; ++c) {
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aOutputChannels[c][s] = outputChannels[c];
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}
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}
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}
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} // namespace mozilla
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@ -9,6 +9,8 @@
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#include <stdint.h>
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#include "nsTArrayForwardDeclare.h"
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#include "AudioSampleFormat.h"
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#include "nsTArray.h"
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namespace mozilla {
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@ -29,6 +31,26 @@ namespace mozilla {
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* Only 1, 2, 4 and 6 are currently defined in Web Audio.
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*/
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enum {
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SURROUND_L,
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SURROUND_R,
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SURROUND_C,
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SURROUND_LFE,
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SURROUND_SL,
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SURROUND_SR
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};
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const uint32_t CUSTOM_CHANNEL_LAYOUTS = 6;
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// This is defined by some Windows SDK header.
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#undef IGNORE
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const int IGNORE = CUSTOM_CHANNEL_LAYOUTS;
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const float IGNORE_F = 0.0f;
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const int gMixingMatrixIndexByChannels[CUSTOM_CHANNEL_LAYOUTS - 1] =
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{ 0, 5, 9, 12, 14 };
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/**
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* Return a channel count whose channel layout includes all the channels from
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* aChannels1 and aChannels2.
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@ -53,19 +75,102 @@ AudioChannelsUpMix(nsTArray<const void*>* aChannelArray,
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uint32_t aOutputChannelCount,
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const void* aZeroChannel);
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/**
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* Given an array of input channels (which must be float format!),
|
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* downmix to aOutputChannelCount, and copy the results to the
|
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* channel buffers in aOutputChannels.
|
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* Don't call this with input count <= output count.
|
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*/
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void
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AudioChannelsDownMix(const nsTArray<const void*>& aChannelArray,
|
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float** aOutputChannels,
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uint32_t aOutputChannelCount,
|
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uint32_t aDuration);
|
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|
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// A version of AudioChannelsDownMix that downmixes int16_ts may be required.
|
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/**
|
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* DownMixMatrix represents a conversion matrix efficiently by exploiting the
|
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* fact that each input channel contributes to at most one output channel,
|
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* except possibly for the C input channel in layouts that have one. Also,
|
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* every input channel is multiplied by the same coefficient for every output
|
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* channel it contributes to.
|
||||
*/
|
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struct DownMixMatrix {
|
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// Every input channel c is copied to output channel mInputDestination[c]
|
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// after multiplying by mInputCoefficient[c].
|
||||
uint8_t mInputDestination[CUSTOM_CHANNEL_LAYOUTS];
|
||||
// If not IGNORE, then the C channel is copied to this output channel after
|
||||
// multiplying by its coefficient.
|
||||
uint8_t mCExtraDestination;
|
||||
float mInputCoefficient[CUSTOM_CHANNEL_LAYOUTS];
|
||||
};
|
||||
|
||||
static const DownMixMatrix
|
||||
gDownMixMatrices[CUSTOM_CHANNEL_LAYOUTS*(CUSTOM_CHANNEL_LAYOUTS - 1)/2] =
|
||||
{
|
||||
// Downmixes to mono
|
||||
{ { 0, 0 }, IGNORE, { 0.5f, 0.5f } },
|
||||
{ { 0, IGNORE, IGNORE }, IGNORE, { 1.0f, IGNORE_F, IGNORE_F } },
|
||||
{ { 0, 0, 0, 0 }, IGNORE, { 0.25f, 0.25f, 0.25f, 0.25f } },
|
||||
{ { 0, IGNORE, IGNORE, IGNORE, IGNORE }, IGNORE, { 1.0f, IGNORE_F, IGNORE_F, IGNORE_F, IGNORE_F } },
|
||||
{ { 0, 0, 0, IGNORE, 0, 0 }, IGNORE, { 0.7071f, 0.7071f, 1.0f, IGNORE_F, 0.5f, 0.5f } },
|
||||
// Downmixes to stereo
|
||||
{ { 0, 1, IGNORE }, IGNORE, { 1.0f, 1.0f, IGNORE_F } },
|
||||
{ { 0, 1, 0, 1 }, IGNORE, { 0.5f, 0.5f, 0.5f, 0.5f } },
|
||||
{ { 0, 1, IGNORE, IGNORE, IGNORE }, IGNORE, { 1.0f, 1.0f, IGNORE_F, IGNORE_F, IGNORE_F } },
|
||||
{ { 0, 1, 0, IGNORE, 0, 1 }, 1, { 1.0f, 1.0f, 0.7071f, IGNORE_F, 0.7071f, 0.7071f } },
|
||||
// Downmixes to 3-channel
|
||||
{ { 0, 1, 2, IGNORE }, IGNORE, { 1.0f, 1.0f, 1.0f, IGNORE_F } },
|
||||
{ { 0, 1, 2, IGNORE, IGNORE }, IGNORE, { 1.0f, 1.0f, 1.0f, IGNORE_F, IGNORE_F } },
|
||||
{ { 0, 1, 2, IGNORE, IGNORE, IGNORE }, IGNORE, { 1.0f, 1.0f, 1.0f, IGNORE_F, IGNORE_F, IGNORE_F } },
|
||||
// Downmixes to quad
|
||||
{ { 0, 1, 2, 3, IGNORE }, IGNORE, { 1.0f, 1.0f, 1.0f, 1.0f, IGNORE_F } },
|
||||
{ { 0, 1, 0, IGNORE, 2, 3 }, 1, { 1.0f, 1.0f, 0.7071f, IGNORE_F, 1.0f, 1.0f } },
|
||||
// Downmixes to 5-channel
|
||||
{ { 0, 1, 2, 3, 4, IGNORE }, IGNORE, { 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, IGNORE_F } }
|
||||
};
|
||||
|
||||
/**
|
||||
* Given an array of input channels, downmix to aOutputChannelCount, and copy
|
||||
* the results to the channel buffers in aOutputChannels. Don't call this with
|
||||
* input count <= output count.
|
||||
*/
|
||||
template<typename T>
|
||||
void AudioChannelsDownMix(const nsTArray<const void*>& aChannelArray,
|
||||
T** aOutputChannels,
|
||||
uint32_t aOutputChannelCount,
|
||||
uint32_t aDuration)
|
||||
{
|
||||
uint32_t inputChannelCount = aChannelArray.Length();
|
||||
const void* const* inputChannels = aChannelArray.Elements();
|
||||
NS_ASSERTION(inputChannelCount > aOutputChannelCount, "Nothing to do");
|
||||
|
||||
if (inputChannelCount > 6) {
|
||||
// Just drop the unknown channels.
|
||||
for (uint32_t o = 0; o < aOutputChannelCount; ++o) {
|
||||
memcpy(aOutputChannels[o], inputChannels[o], aDuration*sizeof(T));
|
||||
}
|
||||
return;
|
||||
}
|
||||
|
||||
// Ignore unknown channels, they're just dropped.
|
||||
inputChannelCount = std::min<uint32_t>(6, inputChannelCount);
|
||||
|
||||
const DownMixMatrix& m = gDownMixMatrices[
|
||||
gMixingMatrixIndexByChannels[aOutputChannelCount - 1] +
|
||||
inputChannelCount - aOutputChannelCount - 1];
|
||||
|
||||
// This is slow, but general. We can define custom code for special
|
||||
// cases later.
|
||||
for (uint32_t s = 0; s < aDuration; ++s) {
|
||||
// Reserve an extra junk channel at the end for the cases where we
|
||||
// want an input channel to contribute to nothing
|
||||
T outputChannels[CUSTOM_CHANNEL_LAYOUTS + 1];
|
||||
memset(outputChannels, 0, sizeof(T)*(CUSTOM_CHANNEL_LAYOUTS));
|
||||
for (uint32_t c = 0; c < inputChannelCount; ++c) {
|
||||
outputChannels[m.mInputDestination[c]] +=
|
||||
m.mInputCoefficient[c]*(static_cast<const T*>(inputChannels[c]))[s];
|
||||
}
|
||||
// Utilize the fact that in every layout, C is the third channel.
|
||||
if (m.mCExtraDestination != IGNORE) {
|
||||
outputChannels[m.mCExtraDestination] +=
|
||||
m.mInputCoefficient[SURROUND_C]*(static_cast<const T*>(inputChannels[SURROUND_C]))[s];
|
||||
}
|
||||
|
||||
for (uint32_t c = 0; c < aOutputChannelCount; ++c) {
|
||||
aOutputChannels[c][s] = outputChannels[c];
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
} // namespace mozilla
|
||||
|
||||
|
|
|
|||
|
|
@ -206,13 +206,13 @@ AudioSegment::Mix(AudioMixer& aMixer, uint32_t aOutputChannels,
|
|||
AudioDataValue* ptr =
|
||||
PointerForOffsetInChannel(buf.Elements(), outBufferLength,
|
||||
aOutputChannels, channel, offsetSamples);
|
||||
PodCopy(ptr, reinterpret_cast<const float*>(channelData[channel]),
|
||||
PodCopy(ptr, reinterpret_cast<const AudioDataValue*>(channelData[channel]),
|
||||
frames);
|
||||
}
|
||||
MOZ_ASSERT(channelData.Length() == aOutputChannels);
|
||||
} else if (channelData.Length() > aOutputChannels) {
|
||||
// Down mix.
|
||||
nsAutoTArray<float*, GUESS_AUDIO_CHANNELS> outChannelPtrs;
|
||||
nsAutoTArray<AudioDataValue*, GUESS_AUDIO_CHANNELS> outChannelPtrs;
|
||||
outChannelPtrs.SetLength(aOutputChannels);
|
||||
uint32_t offsetSamples = 0;
|
||||
for (uint32_t channel = 0; channel < aOutputChannels; channel++) {
|
||||
|
|
@ -228,7 +228,7 @@ AudioSegment::Mix(AudioMixer& aMixer, uint32_t aOutputChannels,
|
|||
AudioDataValue* ptr =
|
||||
PointerForOffsetInChannel(buf.Elements(), outBufferLength,
|
||||
aOutputChannels, channel, offsetSamples);
|
||||
PodCopy(ptr, reinterpret_cast<const float*>(channelData[channel]),
|
||||
PodCopy(ptr, reinterpret_cast<const AudioDataValue*>(channelData[channel]),
|
||||
frames);
|
||||
}
|
||||
}
|
||||
|
|
|
|||
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