зеркало из https://github.com/mozilla/gecko-dev.git
563 строки
16 KiB
C++
563 строки
16 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 "OscillatorNode.h"
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#include "AudioNodeEngine.h"
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#include "AudioNodeStream.h"
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#include "AudioDestinationNode.h"
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#include "WebAudioUtils.h"
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#include "blink/PeriodicWave.h"
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namespace mozilla {
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namespace dom {
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NS_IMPL_CYCLE_COLLECTION_INHERITED(OscillatorNode, AudioNode,
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mPeriodicWave, mFrequency, mDetune)
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(OscillatorNode)
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NS_INTERFACE_MAP_END_INHERITING(AudioNode)
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NS_IMPL_ADDREF_INHERITED(OscillatorNode, AudioNode)
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NS_IMPL_RELEASE_INHERITED(OscillatorNode, AudioNode)
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class OscillatorNodeEngine final : public AudioNodeEngine
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{
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public:
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OscillatorNodeEngine(AudioNode* aNode, AudioDestinationNode* aDestination)
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: AudioNodeEngine(aNode)
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, mSource(nullptr)
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, mDestination(aDestination->Stream())
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, mStart(-1)
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, mStop(STREAM_TIME_MAX)
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// Keep the default values in sync with OscillatorNode::OscillatorNode.
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, mFrequency(440.f)
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, mDetune(0.f)
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, mType(OscillatorType::Sine)
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, mPhase(0.)
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, mRecomputeParameters(true)
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, mCustomLength(0)
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{
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MOZ_ASSERT(NS_IsMainThread());
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mBasicWaveFormCache = aDestination->Context()->GetBasicWaveFormCache();
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}
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void SetSourceStream(AudioNodeStream* aSource)
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{
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mSource = aSource;
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}
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enum Parameters {
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FREQUENCY,
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DETUNE,
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TYPE,
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PERIODICWAVE,
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START,
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STOP,
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};
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void SetTimelineParameter(uint32_t aIndex,
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const AudioParamTimeline& aValue,
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TrackRate aSampleRate) override
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{
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mRecomputeParameters = true;
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switch (aIndex) {
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case FREQUENCY:
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MOZ_ASSERT(mSource && mDestination);
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mFrequency = aValue;
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WebAudioUtils::ConvertAudioParamToTicks(mFrequency, mSource, mDestination);
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break;
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case DETUNE:
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MOZ_ASSERT(mSource && mDestination);
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mDetune = aValue;
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WebAudioUtils::ConvertAudioParamToTicks(mDetune, mSource, mDestination);
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break;
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default:
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NS_ERROR("Bad OscillatorNodeEngine TimelineParameter");
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}
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}
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virtual void SetStreamTimeParameter(uint32_t aIndex, StreamTime aParam) override
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{
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switch (aIndex) {
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case START: mStart = aParam; break;
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case STOP: mStop = aParam; break;
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default:
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NS_ERROR("Bad OscillatorNodeEngine StreamTimeParameter");
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}
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}
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virtual void SetInt32Parameter(uint32_t aIndex, int32_t aParam) override
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{
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switch (aIndex) {
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case TYPE:
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// Set the new type.
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mType = static_cast<OscillatorType>(aParam);
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if (mType == OscillatorType::Sine) {
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// Forget any previous custom data.
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mCustomLength = 0;
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mCustom = nullptr;
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mPeriodicWave = nullptr;
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mRecomputeParameters = true;
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}
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switch (mType) {
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case OscillatorType::Sine:
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mPhase = 0.0;
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break;
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case OscillatorType::Square:
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case OscillatorType::Triangle:
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case OscillatorType::Sawtooth:
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mPeriodicWave = mBasicWaveFormCache->GetBasicWaveForm(mType);
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break;
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case OscillatorType::Custom:
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break;
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default:
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NS_ERROR("Bad OscillatorNodeEngine type parameter.");
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}
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// End type switch.
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break;
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case PERIODICWAVE:
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MOZ_ASSERT(aParam >= 0, "negative custom array length");
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mCustomLength = static_cast<uint32_t>(aParam);
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break;
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default:
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NS_ERROR("Bad OscillatorNodeEngine Int32Parameter.");
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}
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// End index switch.
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}
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virtual void SetBuffer(already_AddRefed<ThreadSharedFloatArrayBufferList> aBuffer) override
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{
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MOZ_ASSERT(mCustomLength, "Custom buffer sent before length");
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mCustom = aBuffer;
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MOZ_ASSERT(mCustom->GetChannels() == 2,
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"PeriodicWave should have sent two channels");
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mPeriodicWave = WebCore::PeriodicWave::create(mSource->SampleRate(),
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mCustom->GetData(0), mCustom->GetData(1), mCustomLength);
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}
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void IncrementPhase()
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{
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const float twoPiFloat = float(2 * M_PI);
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mPhase += mPhaseIncrement;
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if (mPhase > twoPiFloat) {
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mPhase -= twoPiFloat;
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} else if (mPhase < -twoPiFloat) {
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mPhase += twoPiFloat;
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}
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}
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void UpdateParametersIfNeeded(StreamTime ticks, size_t count)
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{
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double frequency, detune;
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// Shortcut if frequency-related AudioParam are not automated, and we
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// already have computed the frequency information and related parameters.
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if (!ParametersMayNeedUpdate()) {
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return;
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}
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bool simpleFrequency = mFrequency.HasSimpleValue();
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bool simpleDetune = mDetune.HasSimpleValue();
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if (simpleFrequency) {
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frequency = mFrequency.GetValue();
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} else {
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frequency = mFrequency.GetValueAtTime(ticks, count);
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}
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if (simpleDetune) {
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detune = mDetune.GetValue();
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} else {
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detune = mDetune.GetValueAtTime(ticks, count);
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}
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mFinalFrequency = frequency * pow(2., detune / 1200.);
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float signalPeriod = mSource->SampleRate() / mFinalFrequency;
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mRecomputeParameters = false;
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mPhaseIncrement = 2 * M_PI / signalPeriod;
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}
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void FillBounds(float* output, StreamTime ticks,
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uint32_t& start, uint32_t& end)
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{
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MOZ_ASSERT(output);
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static_assert(StreamTime(WEBAUDIO_BLOCK_SIZE) < UINT_MAX,
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"WEBAUDIO_BLOCK_SIZE overflows interator bounds.");
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start = 0;
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if (ticks < mStart) {
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start = mStart - ticks;
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for (uint32_t i = 0; i < start; ++i) {
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output[i] = 0.0;
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}
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}
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end = WEBAUDIO_BLOCK_SIZE;
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if (ticks + end > mStop) {
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end = mStop - ticks;
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for (uint32_t i = end; i < WEBAUDIO_BLOCK_SIZE; ++i) {
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output[i] = 0.0;
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}
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}
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}
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void ComputeSine(float * aOutput, StreamTime ticks, uint32_t aStart, uint32_t aEnd)
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{
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for (uint32_t i = aStart; i < aEnd; ++i) {
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UpdateParametersIfNeeded(ticks, i);
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aOutput[i] = sin(mPhase);
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IncrementPhase();
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}
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}
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bool ParametersMayNeedUpdate()
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{
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return !mDetune.HasSimpleValue() ||
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!mFrequency.HasSimpleValue() ||
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mRecomputeParameters;
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}
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void ComputeCustom(float* aOutput,
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StreamTime ticks,
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uint32_t aStart,
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uint32_t aEnd)
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{
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MOZ_ASSERT(mPeriodicWave, "No custom waveform data");
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uint32_t periodicWaveSize = mPeriodicWave->periodicWaveSize();
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// Mask to wrap wave data indices into the range [0,periodicWaveSize).
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uint32_t indexMask = periodicWaveSize - 1;
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MOZ_ASSERT(periodicWaveSize && (periodicWaveSize & indexMask) == 0,
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"periodicWaveSize must be power of 2");
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float* higherWaveData = nullptr;
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float* lowerWaveData = nullptr;
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float tableInterpolationFactor;
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// Phase increment at frequency of 1 Hz.
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// mPhase runs [0,periodicWaveSize) here instead of [0,2*M_PI).
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float basePhaseIncrement = mPeriodicWave->rateScale();
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UpdateParametersIfNeeded(ticks, aStart);
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bool parametersMayNeedUpdate = ParametersMayNeedUpdate();
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mPeriodicWave->waveDataForFundamentalFrequency(mFinalFrequency,
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lowerWaveData,
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higherWaveData,
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tableInterpolationFactor);
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for (uint32_t i = aStart; i < aEnd; ++i) {
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if (parametersMayNeedUpdate) {
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mPeriodicWave->waveDataForFundamentalFrequency(mFinalFrequency,
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lowerWaveData,
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higherWaveData,
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tableInterpolationFactor);
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UpdateParametersIfNeeded(ticks, i);
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}
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// Bilinear interpolation between adjacent samples in each table.
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float floorPhase = floorf(mPhase);
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int j1Signed = static_cast<int>(floorPhase);
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uint32_t j1 = j1Signed & indexMask;
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uint32_t j2 = j1 + 1;
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j2 &= indexMask;
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float sampleInterpolationFactor = mPhase - floorPhase;
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float lower = (1.0f - sampleInterpolationFactor) * lowerWaveData[j1] +
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sampleInterpolationFactor * lowerWaveData[j2];
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float higher = (1.0f - sampleInterpolationFactor) * higherWaveData[j1] +
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sampleInterpolationFactor * higherWaveData[j2];
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aOutput[i] = (1.0f - tableInterpolationFactor) * lower +
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tableInterpolationFactor * higher;
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// Calculate next phase position from wrapped value j1 to avoid loss of
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// precision at large values.
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mPhase =
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j1 + sampleInterpolationFactor + basePhaseIncrement * mFinalFrequency;
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}
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}
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void ComputeSilence(AudioChunk *aOutput)
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{
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aOutput->SetNull(WEBAUDIO_BLOCK_SIZE);
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}
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virtual void ProcessBlock(AudioNodeStream* aStream,
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const AudioChunk& aInput,
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AudioChunk* aOutput,
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bool* aFinished) override
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{
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MOZ_ASSERT(mSource == aStream, "Invalid source stream");
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StreamTime ticks = aStream->GetCurrentPosition();
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if (mStart == -1) {
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ComputeSilence(aOutput);
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return;
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}
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if (ticks >= mStop) {
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// We've finished playing.
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ComputeSilence(aOutput);
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*aFinished = true;
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return;
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}
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if (ticks + WEBAUDIO_BLOCK_SIZE <= mStart) {
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// We're not playing yet.
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ComputeSilence(aOutput);
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return;
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}
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AllocateAudioBlock(1, aOutput);
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float* output = static_cast<float*>(
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const_cast<void*>(aOutput->mChannelData[0]));
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uint32_t start, end;
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FillBounds(output, ticks, start, end);
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// Synthesize the correct waveform.
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switch(mType) {
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case OscillatorType::Sine:
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ComputeSine(output, ticks, start, end);
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break;
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case OscillatorType::Square:
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case OscillatorType::Triangle:
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case OscillatorType::Sawtooth:
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case OscillatorType::Custom:
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ComputeCustom(output, ticks, start, end);
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break;
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default:
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ComputeSilence(aOutput);
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};
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}
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virtual size_t SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const override
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{
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size_t amount = AudioNodeEngine::SizeOfExcludingThis(aMallocSizeOf);
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// Not owned:
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// - mSource
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// - mDestination
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// - mFrequency (internal ref owned by node)
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// - mDetune (internal ref owned by node)
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if (mCustom) {
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amount += mCustom->SizeOfIncludingThis(aMallocSizeOf);
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}
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if (mPeriodicWave) {
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amount += mPeriodicWave->sizeOfIncludingThis(aMallocSizeOf);
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}
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return amount;
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}
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virtual size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const override
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{
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return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
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}
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AudioNodeStream* mSource;
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AudioNodeStream* mDestination;
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StreamTime mStart;
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StreamTime mStop;
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AudioParamTimeline mFrequency;
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AudioParamTimeline mDetune;
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OscillatorType mType;
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float mPhase;
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float mFinalFrequency;
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float mPhaseIncrement;
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bool mRecomputeParameters;
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nsRefPtr<ThreadSharedFloatArrayBufferList> mCustom;
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nsRefPtr<BasicWaveFormCache> mBasicWaveFormCache;
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uint32_t mCustomLength;
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nsRefPtr<WebCore::PeriodicWave> mPeriodicWave;
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};
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OscillatorNode::OscillatorNode(AudioContext* aContext)
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: AudioNode(aContext,
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2,
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ChannelCountMode::Max,
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ChannelInterpretation::Speakers)
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, mType(OscillatorType::Sine)
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, mFrequency(new AudioParam(this, SendFrequencyToStream, 440.0f, "frequency"))
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, mDetune(new AudioParam(this, SendDetuneToStream, 0.0f, "detune"))
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, mStartCalled(false)
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{
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OscillatorNodeEngine* engine = new OscillatorNodeEngine(this, aContext->Destination());
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mStream = aContext->Graph()->CreateAudioNodeStream(engine, MediaStreamGraph::SOURCE_STREAM);
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engine->SetSourceStream(mStream);
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mStream->AddMainThreadListener(this);
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}
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OscillatorNode::~OscillatorNode()
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{
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}
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size_t
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OscillatorNode::SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const
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{
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size_t amount = AudioNode::SizeOfExcludingThis(aMallocSizeOf);
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// For now only report if we know for sure that it's not shared.
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if (mPeriodicWave) {
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amount += mPeriodicWave->SizeOfIncludingThisIfNotShared(aMallocSizeOf);
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}
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amount += mFrequency->SizeOfIncludingThis(aMallocSizeOf);
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amount += mDetune->SizeOfIncludingThis(aMallocSizeOf);
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return amount;
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}
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size_t
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OscillatorNode::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const
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{
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return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
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}
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JSObject*
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OscillatorNode::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
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{
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return OscillatorNodeBinding::Wrap(aCx, this, aGivenProto);
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}
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void
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OscillatorNode::DestroyMediaStream()
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{
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if (mStream) {
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mStream->RemoveMainThreadListener(this);
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}
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AudioNode::DestroyMediaStream();
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}
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void
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OscillatorNode::SendFrequencyToStream(AudioNode* aNode)
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{
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OscillatorNode* This = static_cast<OscillatorNode*>(aNode);
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if (!This->mStream) {
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return;
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}
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SendTimelineParameterToStream(This, OscillatorNodeEngine::FREQUENCY, *This->mFrequency);
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}
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void
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OscillatorNode::SendDetuneToStream(AudioNode* aNode)
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{
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OscillatorNode* This = static_cast<OscillatorNode*>(aNode);
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if (!This->mStream) {
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return;
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}
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SendTimelineParameterToStream(This, OscillatorNodeEngine::DETUNE, *This->mDetune);
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}
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void
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OscillatorNode::SendTypeToStream()
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{
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if (!mStream) {
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return;
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}
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if (mType == OscillatorType::Custom) {
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// The engine assumes we'll send the custom data before updating the type.
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SendPeriodicWaveToStream();
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}
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SendInt32ParameterToStream(OscillatorNodeEngine::TYPE, static_cast<int32_t>(mType));
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}
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void OscillatorNode::SendPeriodicWaveToStream()
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{
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NS_ASSERTION(mType == OscillatorType::Custom,
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"Sending custom waveform to engine thread with non-custom type");
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MOZ_ASSERT(mStream, "Missing node stream.");
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MOZ_ASSERT(mPeriodicWave, "Send called without PeriodicWave object.");
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SendInt32ParameterToStream(OscillatorNodeEngine::PERIODICWAVE,
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mPeriodicWave->DataLength());
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nsRefPtr<ThreadSharedFloatArrayBufferList> data =
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mPeriodicWave->GetThreadSharedBuffer();
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mStream->SetBuffer(data.forget());
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}
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void
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OscillatorNode::Start(double aWhen, ErrorResult& aRv)
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{
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if (!WebAudioUtils::IsTimeValid(aWhen)) {
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aRv.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
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return;
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}
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if (mStartCalled) {
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aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
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return;
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}
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mStartCalled = true;
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if (!mStream) {
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// Nothing to play, or we're already dead for some reason
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return;
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}
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// TODO: Perhaps we need to do more here.
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mStream->SetStreamTimeParameter(OscillatorNodeEngine::START,
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Context(), aWhen);
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MarkActive();
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}
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void
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OscillatorNode::Stop(double aWhen, ErrorResult& aRv)
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{
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if (!WebAudioUtils::IsTimeValid(aWhen)) {
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aRv.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
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return;
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}
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if (!mStartCalled) {
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aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
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return;
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}
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if (!mStream || !Context()) {
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// We've already stopped and had our stream shut down
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return;
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}
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// TODO: Perhaps we need to do more here.
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mStream->SetStreamTimeParameter(OscillatorNodeEngine::STOP,
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Context(), std::max(0.0, aWhen));
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}
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void
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OscillatorNode::NotifyMainThreadStreamFinished()
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{
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MOZ_ASSERT(mStream->IsFinished());
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class EndedEventDispatcher final : public nsRunnable
|
|
{
|
|
public:
|
|
explicit EndedEventDispatcher(OscillatorNode* aNode)
|
|
: mNode(aNode) {}
|
|
NS_IMETHOD Run() override
|
|
{
|
|
// If it's not safe to run scripts right now, schedule this to run later
|
|
if (!nsContentUtils::IsSafeToRunScript()) {
|
|
nsContentUtils::AddScriptRunner(this);
|
|
return NS_OK;
|
|
}
|
|
|
|
mNode->DispatchTrustedEvent(NS_LITERAL_STRING("ended"));
|
|
// Release stream resources.
|
|
mNode->DestroyMediaStream();
|
|
return NS_OK;
|
|
}
|
|
private:
|
|
nsRefPtr<OscillatorNode> mNode;
|
|
};
|
|
|
|
NS_DispatchToMainThread(new EndedEventDispatcher(this));
|
|
|
|
// Drop the playing reference
|
|
// Warning: The below line might delete this.
|
|
MarkInactive();
|
|
}
|
|
|
|
} // namespace dom
|
|
} // namespace mozilla
|