Implement BaseAudioContext

third_party/WebKit/Source/modules/webaudio/AbstractAudioContext.cpp

Index: third_party/WebKit/Source/modules/webaudio/AbstractAudioContext.cpp
diff --git a/third_party/WebKit/Source/modules/webaudio/AbstractAudioContext.cpp b/third_party/WebKit/Source/modules/webaudio/AbstractAudioContext.cpp
deleted file mode 100644
index efd5cd17cfbee13f2019e419a358fa7e68b1be36..0000000000000000000000000000000000000000
--- a/third_party/WebKit/Source/modules/webaudio/AbstractAudioContext.cpp
+++ /dev/null
@@ -1,958 +0,0 @@
-/*
- * Copyright (C) 2010, Google Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1.  Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2.  Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
- * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
- * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include "modules/webaudio/AbstractAudioContext.h"
-#include "bindings/core/v8/Dictionary.h"
-#include "bindings/core/v8/ExceptionMessages.h"
-#include "bindings/core/v8/ExceptionState.h"
-#include "bindings/core/v8/ScriptPromiseResolver.h"
-#include "bindings/core/v8/ScriptState.h"
-#include "core/dom/DOMException.h"
-#include "core/dom/Document.h"
-#include "core/dom/ExceptionCode.h"
-#include "core/dom/ExecutionContextTask.h"
-#include "core/html/HTMLMediaElement.h"
-#include "modules/mediastream/MediaStream.h"
-#include "modules/webaudio/AnalyserNode.h"
-#include "modules/webaudio/AudioBuffer.h"
-#include "modules/webaudio/AudioBufferCallback.h"
-#include "modules/webaudio/AudioBufferSourceNode.h"
-#include "modules/webaudio/AudioContext.h"
-#include "modules/webaudio/AudioListener.h"
-#include "modules/webaudio/AudioNodeInput.h"
-#include "modules/webaudio/AudioNodeOutput.h"
-#include "modules/webaudio/BiquadFilterNode.h"
-#include "modules/webaudio/ChannelMergerNode.h"
-#include "modules/webaudio/ChannelSplitterNode.h"
-#include "modules/webaudio/ConvolverNode.h"
-#include "modules/webaudio/DefaultAudioDestinationNode.h"
-#include "modules/webaudio/DelayNode.h"
-#include "modules/webaudio/DynamicsCompressorNode.h"
-#include "modules/webaudio/GainNode.h"
-#include "modules/webaudio/IIRFilterNode.h"
-#include "modules/webaudio/MediaElementAudioSourceNode.h"
-#include "modules/webaudio/MediaStreamAudioDestinationNode.h"
-#include "modules/webaudio/MediaStreamAudioSourceNode.h"
-#include "modules/webaudio/OfflineAudioCompletionEvent.h"
-#include "modules/webaudio/OfflineAudioContext.h"
-#include "modules/webaudio/OfflineAudioDestinationNode.h"
-#include "modules/webaudio/OscillatorNode.h"
-#include "modules/webaudio/PannerNode.h"
-#include "modules/webaudio/PeriodicWave.h"
-#include "modules/webaudio/ScriptProcessorNode.h"
-#include "modules/webaudio/StereoPannerNode.h"
-#include "modules/webaudio/WaveShaperNode.h"
-#include "platform/ThreadSafeFunctional.h"
-#include "platform/audio/IIRFilter.h"
-#include "public/platform/Platform.h"
-#include "wtf/text/WTFString.h"
-
-namespace blink {
-
-AbstractAudioContext* AbstractAudioContext::create(Document& document, ExceptionState& exceptionState)
-{
-    return AudioContext::create(document, exceptionState);
-}
-
-// FIXME(dominicc): Devolve these constructors to AudioContext
-// and OfflineAudioContext respectively.
-
-// Constructor for rendering to the audio hardware.
-AbstractAudioContext::AbstractAudioContext(Document* document)
-    : ActiveScriptWrappable(this)
-    , ActiveDOMObject(document)
-    , m_destinationNode(nullptr)
-    , m_isCleared(false)
-    , m_isResolvingResumePromises(false)
-    , m_connectionCount(0)
-    , m_didInitializeContextGraphMutex(false)
-    , m_deferredTaskHandler(DeferredTaskHandler::create())
-    , m_contextState(Suspended)
-    , m_closedContextSampleRate(-1)
-    , m_periodicWaveSine(nullptr)
-    , m_periodicWaveSquare(nullptr)
-    , m_periodicWaveSawtooth(nullptr)
-    , m_periodicWaveTriangle(nullptr)
-{
-    m_didInitializeContextGraphMutex = true;
-    m_destinationNode = DefaultAudioDestinationNode::create(this);
-
-    initialize();
-}
-
-// Constructor for offline (non-realtime) rendering.
-AbstractAudioContext::AbstractAudioContext(Document* document, unsigned numberOfChannels, size_t numberOfFrames, float sampleRate)
-    : ActiveScriptWrappable(this)
-    , ActiveDOMObject(document)
-    , m_destinationNode(nullptr)
-    , m_isCleared(false)
-    , m_isResolvingResumePromises(false)
-    , m_connectionCount(0)
-    , m_didInitializeContextGraphMutex(false)
-    , m_deferredTaskHandler(DeferredTaskHandler::create())
-    , m_contextState(Suspended)
-    , m_closedContextSampleRate(-1)
-    , m_periodicWaveSine(nullptr)
-    , m_periodicWaveSquare(nullptr)
-    , m_periodicWaveSawtooth(nullptr)
-    , m_periodicWaveTriangle(nullptr)
-{
-    m_didInitializeContextGraphMutex = true;
-}
-
-AbstractAudioContext::~AbstractAudioContext()
-{
-    deferredTaskHandler().contextWillBeDestroyed();
-    // AudioNodes keep a reference to their context, so there should be no way to be in the destructor if there are still AudioNodes around.
-    ASSERT(!isDestinationInitialized());
-    ASSERT(!m_activeSourceNodes.size());
-    ASSERT(!m_finishedSourceHandlers.size());
-    ASSERT(!m_isResolvingResumePromises);
-    ASSERT(!m_resumeResolvers.size());
-}
-
-void AbstractAudioContext::initialize()
-{
-    if (isDestinationInitialized())
-        return;
-
-    FFTFrame::initialize();
-    m_listener = AudioListener::create();
-
-    if (m_destinationNode.get()) {
-        m_destinationNode->handler().initialize();
-    }
-}
-
-void AbstractAudioContext::clear()
-{
-    m_destinationNode.clear();
-    // The audio rendering thread is dead.  Nobody will schedule AudioHandler
-    // deletion.  Let's do it ourselves.
-    deferredTaskHandler().clearHandlersToBeDeleted();
-    m_isCleared = true;
-}
-
-void AbstractAudioContext::uninitialize()
-{
-    ASSERT(isMainThread());
-
-    if (!isDestinationInitialized())
-        return;
-
-    // This stops the audio thread and all audio rendering.
-    if (m_destinationNode)
-        m_destinationNode->handler().uninitialize();
-
-    // Get rid of the sources which may still be playing.
-    releaseActiveSourceNodes();
-
-    // Reject any pending resolvers before we go away.
-    rejectPendingResolvers();
-    didClose();
-
-    ASSERT(m_listener);
-    m_listener->waitForHRTFDatabaseLoaderThreadCompletion();
-
-    clear();
-}
-
-void AbstractAudioContext::stop()
-{
-    uninitialize();
-}
-
-bool AbstractAudioContext::hasPendingActivity() const
-{
-    // There's no pending activity if the audio context has been cleared.
-    return !m_isCleared;
-}
-
-void AbstractAudioContext::throwExceptionForClosedState(ExceptionState& exceptionState)
-{
-    exceptionState.throwDOMException(InvalidStateError, "AudioContext has been closed.");
-}
-
-AudioBuffer* AbstractAudioContext::createBuffer(unsigned numberOfChannels, size_t numberOfFrames, float sampleRate, ExceptionState& exceptionState)
-{
-    // It's ok to call createBuffer, even if the context is closed because the AudioBuffer doesn't
-    // really "belong" to any particular context.
-
-    return AudioBuffer::create(numberOfChannels, numberOfFrames, sampleRate, exceptionState);
-}
-
-ScriptPromise AbstractAudioContext::decodeAudioData(ScriptState* scriptState, DOMArrayBuffer* audioData, AudioBufferCallback* successCallback, AudioBufferCallback* errorCallback, ExceptionState& exceptionState)
-{
-    ASSERT(isMainThread());
-    ASSERT(audioData);
-
-    ScriptPromiseResolver* resolver = ScriptPromiseResolver::create(scriptState);
-    ScriptPromise promise = resolver->promise();
-
-    float rate = isContextClosed() ? closedContextSampleRate() : sampleRate();
-
-    ASSERT(rate > 0);
-
-    m_decodeAudioResolvers.add(resolver);
-    m_audioDecoder.decodeAsync(audioData, rate, successCallback, errorCallback, resolver, this);
-
-    return promise;
-}
-
-void AbstractAudioContext::handleDecodeAudioData(AudioBuffer* audioBuffer, ScriptPromiseResolver* resolver, AudioBufferCallback* successCallback, AudioBufferCallback* errorCallback)
-{
-    ASSERT(isMainThread());
-
-    if (audioBuffer) {
-        // Resolve promise successfully and run the success callback
-        resolver->resolve(audioBuffer);
-        if (successCallback)
-            successCallback->handleEvent(audioBuffer);
-    } else {
-        // Reject the promise and run the error callback
-        DOMException* error = DOMException::create(EncodingError, "Unable to decode audio data");
-        resolver->reject(error);
-        if (errorCallback)
-            errorCallback->handleEvent(error);
-    }
-
-    // We've resolved the promise.  Remove it now.
-    ASSERT(m_decodeAudioResolvers.contains(resolver));
-    m_decodeAudioResolvers.remove(resolver);
-}
-
-AudioBufferSourceNode* AbstractAudioContext::createBufferSource(ExceptionState& exceptionState)
-{
-    ASSERT(isMainThread());
-
-    if (isContextClosed()) {
-        throwExceptionForClosedState(exceptionState);
-        return nullptr;
-    }
-
-    AudioBufferSourceNode* node = AudioBufferSourceNode::create(*this, sampleRate());
-
-    // Do not add a reference to this source node now. The reference will be added when start() is
-    // called.
-
-    return node;
-}
-
-MediaElementAudioSourceNode* AbstractAudioContext::createMediaElementSource(HTMLMediaElement* mediaElement, ExceptionState& exceptionState)
-{
-    ASSERT(isMainThread());
-
-    if (isContextClosed()) {
-        throwExceptionForClosedState(exceptionState);
-        return nullptr;
-    }
-
-    // First check if this media element already has a source node.
-    if (mediaElement->audioSourceNode()) {
-        exceptionState.throwDOMException(
-            InvalidStateError,
-            "HTMLMediaElement already connected previously to a different MediaElementSourceNode.");
-        return nullptr;
-    }
-
-    MediaElementAudioSourceNode* node = MediaElementAudioSourceNode::create(*this, *mediaElement);
-
-    mediaElement->setAudioSourceNode(node);
-
-    notifySourceNodeStartedProcessing(node); // context keeps reference until node is disconnected
-    return node;
-}
-
-MediaStreamAudioSourceNode* AbstractAudioContext::createMediaStreamSource(MediaStream* mediaStream, ExceptionState& exceptionState)
-{
-    ASSERT(isMainThread());
-
-    if (isContextClosed()) {
-        throwExceptionForClosedState(exceptionState);
-        return nullptr;
-    }
-
-    MediaStreamTrackVector audioTracks = mediaStream->getAudioTracks();
-    if (audioTracks.isEmpty()) {
-        exceptionState.throwDOMException(
-            InvalidStateError,
-            "MediaStream has no audio track");
-        return nullptr;
-    }
-
-    // Use the first audio track in the media stream.
-    MediaStreamTrack* audioTrack = audioTracks[0];
-    OwnPtr<AudioSourceProvider> provider = audioTrack->createWebAudioSource();
-    MediaStreamAudioSourceNode* node = MediaStreamAudioSourceNode::create(*this, *mediaStream, audioTrack, provider.release());
-
-    // FIXME: Only stereo streams are supported right now. We should be able to accept multi-channel streams.
-    node->setFormat(2, sampleRate());
-
-    notifySourceNodeStartedProcessing(node); // context keeps reference until node is disconnected
-    return node;
-}
-
-MediaStreamAudioDestinationNode* AbstractAudioContext::createMediaStreamDestination(ExceptionState& exceptionState)
-{
-    if (isContextClosed()) {
-        throwExceptionForClosedState(exceptionState);
-        return nullptr;
-    }
-
-    // Set number of output channels to stereo by default.
-    return MediaStreamAudioDestinationNode::create(*this, 2);
-}
-
-ScriptProcessorNode* AbstractAudioContext::createScriptProcessor(ExceptionState& exceptionState)
-{
-    // Set number of input/output channels to stereo by default.
-    return createScriptProcessor(0, 2, 2, exceptionState);
-}
-
-ScriptProcessorNode* AbstractAudioContext::createScriptProcessor(size_t bufferSize, ExceptionState& exceptionState)
-{
-    // Set number of input/output channels to stereo by default.
-    return createScriptProcessor(bufferSize, 2, 2, exceptionState);
-}
-
-ScriptProcessorNode* AbstractAudioContext::createScriptProcessor(size_t bufferSize, size_t numberOfInputChannels, ExceptionState& exceptionState)
-{
-    // Set number of output channels to stereo by default.
-    return createScriptProcessor(bufferSize, numberOfInputChannels, 2, exceptionState);
-}
-
-ScriptProcessorNode* AbstractAudioContext::createScriptProcessor(size_t bufferSize, size_t numberOfInputChannels, size_t numberOfOutputChannels, ExceptionState& exceptionState)
-{
-    ASSERT(isMainThread());
-
-    if (isContextClosed()) {
-        throwExceptionForClosedState(exceptionState);
-        return nullptr;
-    }
-
-    ScriptProcessorNode* node = ScriptProcessorNode::create(*this, sampleRate(), bufferSize, numberOfInputChannels, numberOfOutputChannels);
-
-    if (!node) {
-        if (!numberOfInputChannels && !numberOfOutputChannels) {
-            exceptionState.throwDOMException(
-                IndexSizeError,
-                "number of input channels and output channels cannot both be zero.");
-        } else if (numberOfInputChannels > AbstractAudioContext::maxNumberOfChannels()) {
-            exceptionState.throwDOMException(
-                IndexSizeError,
-                "number of input channels (" + String::number(numberOfInputChannels)
-                + ") exceeds maximum ("
-                + String::number(AbstractAudioContext::maxNumberOfChannels()) + ").");
-        } else if (numberOfOutputChannels > AbstractAudioContext::maxNumberOfChannels()) {
-            exceptionState.throwDOMException(
-                IndexSizeError,
-                "number of output channels (" + String::number(numberOfInputChannels)
-                + ") exceeds maximum ("
-                + String::number(AbstractAudioContext::maxNumberOfChannels()) + ").");
-        } else {
-            exceptionState.throwDOMException(
-                IndexSizeError,
-                "buffer size (" + String::number(bufferSize)
-                + ") must be a power of two between 256 and 16384.");
-        }
-        return nullptr;
-    }
-
-    notifySourceNodeStartedProcessing(node); // context keeps reference until we stop making javascript rendering callbacks
-    return node;
-}
-
-StereoPannerNode* AbstractAudioContext::createStereoPanner(ExceptionState& exceptionState)
-{
-    ASSERT(isMainThread());
-    if (isContextClosed()) {
-        throwExceptionForClosedState(exceptionState);
-        return nullptr;
-    }
-
-    return StereoPannerNode::create(*this, sampleRate());
-}
-
-BiquadFilterNode* AbstractAudioContext::createBiquadFilter(ExceptionState& exceptionState)
-{
-    ASSERT(isMainThread());
-    if (isContextClosed()) {
-        throwExceptionForClosedState(exceptionState);
-        return nullptr;
-    }
-
-    return BiquadFilterNode::create(*this, sampleRate());
-}
-
-WaveShaperNode* AbstractAudioContext::createWaveShaper(ExceptionState& exceptionState)
-{
-    ASSERT(isMainThread());
-    if (isContextClosed()) {
-        throwExceptionForClosedState(exceptionState);
-        return nullptr;
-    }
-
-    return WaveShaperNode::create(*this);
-}
-
-PannerNode* AbstractAudioContext::createPanner(ExceptionState& exceptionState)
-{
-    ASSERT(isMainThread());
-    if (isContextClosed()) {
-        throwExceptionForClosedState(exceptionState);
-        return nullptr;
-    }
-
-    return PannerNode::create(*this, sampleRate());
-}
-
-ConvolverNode* AbstractAudioContext::createConvolver(ExceptionState& exceptionState)
-{
-    ASSERT(isMainThread());
-    if (isContextClosed()) {
-        throwExceptionForClosedState(exceptionState);
-        return nullptr;
-    }
-
-    return ConvolverNode::create(*this, sampleRate());
-}
-
-DynamicsCompressorNode* AbstractAudioContext::createDynamicsCompressor(ExceptionState& exceptionState)
-{
-    ASSERT(isMainThread());
-    if (isContextClosed()) {
-        throwExceptionForClosedState(exceptionState);
-        return nullptr;
-    }
-
-    return DynamicsCompressorNode::create(*this, sampleRate());
-}
-
-AnalyserNode* AbstractAudioContext::createAnalyser(ExceptionState& exceptionState)
-{
-    ASSERT(isMainThread());
-    if (isContextClosed()) {
-        throwExceptionForClosedState(exceptionState);
-        return nullptr;
-    }
-
-    return AnalyserNode::create(*this, sampleRate());
-}
-
-GainNode* AbstractAudioContext::createGain(ExceptionState& exceptionState)
-{
-    ASSERT(isMainThread());
-    if (isContextClosed()) {
-        throwExceptionForClosedState(exceptionState);
-        return nullptr;
-    }
-
-    return GainNode::create(*this, sampleRate());
-}
-
-DelayNode* AbstractAudioContext::createDelay(ExceptionState& exceptionState)
-{
-    const double defaultMaxDelayTime = 1;
-    return createDelay(defaultMaxDelayTime, exceptionState);
-}
-
-DelayNode* AbstractAudioContext::createDelay(double maxDelayTime, ExceptionState& exceptionState)
-{
-    ASSERT(isMainThread());
-    if (isContextClosed()) {
-        throwExceptionForClosedState(exceptionState);
-        return nullptr;
-    }
-
-    return DelayNode::create(*this, sampleRate(), maxDelayTime, exceptionState);
-}
-
-ChannelSplitterNode* AbstractAudioContext::createChannelSplitter(ExceptionState& exceptionState)
-{
-    const unsigned ChannelSplitterDefaultNumberOfOutputs = 6;
-    return createChannelSplitter(ChannelSplitterDefaultNumberOfOutputs, exceptionState);
-}
-
-ChannelSplitterNode* AbstractAudioContext::createChannelSplitter(size_t numberOfOutputs, ExceptionState& exceptionState)
-{
-    ASSERT(isMainThread());
-
-    if (isContextClosed()) {
-        throwExceptionForClosedState(exceptionState);
-        return nullptr;
-    }
-
-    ChannelSplitterNode* node = ChannelSplitterNode::create(*this, sampleRate(), numberOfOutputs);
-
-    if (!node) {
-        exceptionState.throwDOMException(
-            IndexSizeError,
-            "number of outputs (" + String::number(numberOfOutputs)
-            + ") must be between 1 and "
-            + String::number(AbstractAudioContext::maxNumberOfChannels()) + ".");
-        return nullptr;
-    }
-
-    return node;
-}
-
-ChannelMergerNode* AbstractAudioContext::createChannelMerger(ExceptionState& exceptionState)
-{
-    const unsigned ChannelMergerDefaultNumberOfInputs = 6;
-    return createChannelMerger(ChannelMergerDefaultNumberOfInputs, exceptionState);
-}
-
-ChannelMergerNode* AbstractAudioContext::createChannelMerger(size_t numberOfInputs, ExceptionState& exceptionState)
-{
-    ASSERT(isMainThread());
-    if (isContextClosed()) {
-        throwExceptionForClosedState(exceptionState);
-        return nullptr;
-    }
-
-    ChannelMergerNode* node = ChannelMergerNode::create(*this, sampleRate(), numberOfInputs);
-
-    if (!node) {
-        exceptionState.throwDOMException(
-            IndexSizeError,
-            ExceptionMessages::indexOutsideRange<size_t>(
-                "number of inputs",
-                numberOfInputs,
-                1,
-                ExceptionMessages::InclusiveBound,
-                AbstractAudioContext::maxNumberOfChannels(),
-                ExceptionMessages::InclusiveBound));
-        return nullptr;
-    }
-
-    return node;
-}
-
-OscillatorNode* AbstractAudioContext::createOscillator(ExceptionState& exceptionState)
-{
-    ASSERT(isMainThread());
-    if (isContextClosed()) {
-        throwExceptionForClosedState(exceptionState);
-        return nullptr;
-    }
-
-    OscillatorNode* node = OscillatorNode::create(*this, sampleRate());
-
-    // Do not add a reference to this source node now. The reference will be added when start() is
-    // called.
-
-    return node;
-}
-
-PeriodicWave* AbstractAudioContext::createPeriodicWave(DOMFloat32Array* real, DOMFloat32Array* imag, ExceptionState& exceptionState)
-{
-    return PeriodicWave::create(sampleRate(), real, imag, false);
-}
-
-PeriodicWave* AbstractAudioContext::createPeriodicWave(DOMFloat32Array* real, DOMFloat32Array* imag, const Dictionary& options, ExceptionState& exceptionState)
-{
-    ASSERT(isMainThread());
-
-    if (isContextClosed()) {
-        throwExceptionForClosedState(exceptionState);
-        return nullptr;
-    }
-
-    if (real->length() != imag->length()) {
-        exceptionState.throwDOMException(
-            IndexSizeError,
-            "length of real array (" + String::number(real->length())
-            + ") and length of imaginary array (" +  String::number(imag->length())
-            + ") must match.");
-        return nullptr;
-    }
-
-    bool isNormalizationDisabled = false;
-    DictionaryHelper::getWithUndefinedOrNullCheck(options, "disableNormalization", isNormalizationDisabled);
-
-    return PeriodicWave::create(sampleRate(), real, imag, isNormalizationDisabled);
-}
-
-IIRFilterNode* AbstractAudioContext::createIIRFilter(Vector<double> feedforwardCoef, Vector<double> feedbackCoef,  ExceptionState& exceptionState)
-{
-    ASSERT(isMainThread());
-
-    if (isContextClosed()) {
-        throwExceptionForClosedState(exceptionState);
-        return nullptr;
-    }
-
-    if (feedbackCoef.size() == 0 || (feedbackCoef.size() > IIRFilter::kMaxOrder + 1)) {
-        exceptionState.throwDOMException(
-            NotSupportedError,
-            ExceptionMessages::indexOutsideRange<size_t>(
-                "number of feedback coefficients",
-                feedbackCoef.size(),
-                1,
-                ExceptionMessages::InclusiveBound,
-                IIRFilter::kMaxOrder + 1,
-                ExceptionMessages::InclusiveBound));
-        return nullptr;
-    }
-
-    if (feedforwardCoef.size() == 0 || (feedforwardCoef.size() > IIRFilter::kMaxOrder + 1)) {
-        exceptionState.throwDOMException(
-            NotSupportedError,
-            ExceptionMessages::indexOutsideRange<size_t>(
-                "number of feedforward coefficients",
-                feedforwardCoef.size(),
-                1,
-                ExceptionMessages::InclusiveBound,
-                IIRFilter::kMaxOrder + 1,
-                ExceptionMessages::InclusiveBound));
-        return nullptr;
-    }
-
-    if (feedbackCoef[0] == 0) {
-        exceptionState.throwDOMException(
-            InvalidStateError,
-            "First feedback coefficient cannot be zero.");
-        return nullptr;
-    }
-
-    bool hasNonZeroCoef = false;
-
-    for (size_t k = 0; k < feedforwardCoef.size(); ++k) {
-        if (feedforwardCoef[k] != 0) {
-            hasNonZeroCoef = true;
-            break;
-        }
-    }
-
-    if (!hasNonZeroCoef) {
-        exceptionState.throwDOMException(
-            InvalidStateError,
-            "At least one feedforward coefficient must be non-zero.");
-        return nullptr;
-    }
-
-    // Make sure all coefficents are finite.
-    for (size_t k = 0; k < feedforwardCoef.size(); ++k) {
-        double c = feedforwardCoef[k];
-        if (!std::isfinite(c)) {
-            String name = "feedforward coefficient " + String::number(k);
-            exceptionState.throwDOMException(
-                InvalidStateError,
-                ExceptionMessages::notAFiniteNumber(c, name.ascii().data()));
-            return nullptr;
-        }
-    }
-
-    for (size_t k = 0; k < feedbackCoef.size(); ++k) {
-        double c = feedbackCoef[k];
-        if (!std::isfinite(c)) {
-            String name = "feedback coefficient " + String::number(k);
-            exceptionState.throwDOMException(
-                InvalidStateError,
-                ExceptionMessages::notAFiniteNumber(c, name.ascii().data()));
-            return nullptr;
-        }
-    }
-
-    return IIRFilterNode::create(*this, sampleRate(), feedforwardCoef, feedbackCoef);
-}
-
-PeriodicWave* AbstractAudioContext::periodicWave(int type)
-{
-    switch (type) {
-    case OscillatorHandler::SINE:
-        // Initialize the table if necessary
-        if (!m_periodicWaveSine)
-            m_periodicWaveSine = PeriodicWave::createSine(sampleRate());
-        return m_periodicWaveSine;
-    case OscillatorHandler::SQUARE:
-        // Initialize the table if necessary
-        if (!m_periodicWaveSquare)
-            m_periodicWaveSquare = PeriodicWave::createSquare(sampleRate());
-        return m_periodicWaveSquare;
-    case OscillatorHandler::SAWTOOTH:
-        // Initialize the table if necessary
-        if (!m_periodicWaveSawtooth)
-            m_periodicWaveSawtooth = PeriodicWave::createSawtooth(sampleRate());
-        return m_periodicWaveSawtooth;
-    case OscillatorHandler::TRIANGLE:
-        // Initialize the table if necessary
-        if (!m_periodicWaveTriangle)
-            m_periodicWaveTriangle = PeriodicWave::createTriangle(sampleRate());
-        return m_periodicWaveTriangle;
-    default:
-        ASSERT_NOT_REACHED();
-        return nullptr;
-    }
-}
-
-String AbstractAudioContext::state() const
-{
-    // These strings had better match the strings for AudioContextState in AudioContext.idl.
-    switch (m_contextState) {
-    case Suspended:
-        return "suspended";
-    case Running:
-        return "running";
-    case Closed:
-        return "closed";
-    }
-    ASSERT_NOT_REACHED();
-    return "";
-}
-
-void AbstractAudioContext::setContextState(AudioContextState newState)
-{
-    ASSERT(isMainThread());
-
-    // Validate the transitions.  The valid transitions are Suspended->Running, Running->Suspended,
-    // and anything->Closed.
-    switch (newState) {
-    case Suspended:
-        ASSERT(m_contextState == Running);
-        break;
-    case Running:
-        ASSERT(m_contextState == Suspended);
-        break;
-    case Closed:
-        ASSERT(m_contextState != Closed);
-        break;
-    }
-
-    if (newState == m_contextState) {
-        // ASSERTs above failed; just return.
-        return;
-    }
-
-    m_contextState = newState;
-
-    // Notify context that state changed
-    if (getExecutionContext())
-        getExecutionContext()->postTask(BLINK_FROM_HERE, createSameThreadTask(&AbstractAudioContext::notifyStateChange, this));
-}
-
-void AbstractAudioContext::notifyStateChange()
-{
-    dispatchEvent(Event::create(EventTypeNames::statechange));
-}
-
-void AbstractAudioContext::notifySourceNodeFinishedProcessing(AudioHandler* handler)
-{
-    ASSERT(isAudioThread());
-    m_finishedSourceHandlers.append(handler);
-}
-
-void AbstractAudioContext::releaseFinishedSourceNodes()
-{
-    ASSERT(isGraphOwner());
-    ASSERT(isAudioThread());
-    for (AudioHandler* handler : m_finishedSourceHandlers) {
-        for (unsigned i = 0; i < m_activeSourceNodes.size(); ++i) {
-            if (handler == &m_activeSourceNodes[i]->handler()) {
-                handler->breakConnection();
-                m_activeSourceNodes.remove(i);
-                break;
-            }
-        }
-    }
-
-    m_finishedSourceHandlers.clear();
-}
-
-void AbstractAudioContext::notifySourceNodeStartedProcessing(AudioNode* node)
-{
-    ASSERT(isMainThread());
-    AutoLocker locker(this);
-
-    m_activeSourceNodes.append(node);
-    node->handler().makeConnection();
-}
-
-void AbstractAudioContext::releaseActiveSourceNodes()
-{
-    ASSERT(isMainThread());
-    for (auto& sourceNode : m_activeSourceNodes)
-        sourceNode->handler().breakConnection();
-
-    m_activeSourceNodes.clear();
-}
-
-void AbstractAudioContext::handleStoppableSourceNodes()
-{
-    ASSERT(isGraphOwner());
-
-    // Find AudioBufferSourceNodes to see if we can stop playing them.
-    for (AudioNode* node : m_activeSourceNodes) {
-        if (node->handler().getNodeType() == AudioHandler::NodeTypeAudioBufferSource) {
-            AudioBufferSourceNode* sourceNode = static_cast<AudioBufferSourceNode*>(node);
-            sourceNode->audioBufferSourceHandler().handleStoppableSourceNode();
-        }
-    }
-}
-
-void AbstractAudioContext::handlePreRenderTasks()
-{
-    ASSERT(isAudioThread());
-
-    // At the beginning of every render quantum, try to update the internal rendering graph state (from main thread changes).
-    // It's OK if the tryLock() fails, we'll just take slightly longer to pick up the changes.
-    if (tryLock()) {
-        deferredTaskHandler().handleDeferredTasks();
-
-        resolvePromisesForResume();
-
-        // Check to see if source nodes can be stopped because the end time has passed.
-        handleStoppableSourceNodes();
-
-        unlock();
-    }
-}
-
-void AbstractAudioContext::handlePostRenderTasks()
-{
-    ASSERT(isAudioThread());
-
-    // Must use a tryLock() here too.  Don't worry, the lock will very rarely be contended and this method is called frequently.
-    // The worst that can happen is that there will be some nodes which will take slightly longer than usual to be deleted or removed
-    // from the render graph (in which case they'll render silence).
-    if (tryLock()) {
-        // Take care of AudioNode tasks where the tryLock() failed previously.
-        deferredTaskHandler().breakConnections();
-
-        // Dynamically clean up nodes which are no longer needed.
-        releaseFinishedSourceNodes();
-
-        deferredTaskHandler().handleDeferredTasks();
-        deferredTaskHandler().requestToDeleteHandlersOnMainThread();
-
-        unlock();
-    }
-}
-
-void AbstractAudioContext::resolvePromisesForResumeOnMainThread()
-{
-    ASSERT(isMainThread());
-    AutoLocker locker(this);
-
-    for (auto& resolver : m_resumeResolvers) {
-        if (m_contextState == Closed) {
-            resolver->reject(
-                DOMException::create(InvalidStateError, "Cannot resume a context that has been closed"));
-        } else {
-            resolver->resolve();
-        }
-    }
-
-    m_resumeResolvers.clear();
-    m_isResolvingResumePromises = false;
-}
-
-void AbstractAudioContext::resolvePromisesForResume()
-{
-    // This runs inside the AbstractAudioContext's lock when handling pre-render tasks.
-    ASSERT(isAudioThread());
-    ASSERT(isGraphOwner());
-
-    // Resolve any pending promises created by resume(). Only do this if we haven't already started
-    // resolving these promises. This gets called very often and it takes some time to resolve the
-    // promises in the main thread.
-    if (!m_isResolvingResumePromises && m_resumeResolvers.size() > 0) {
-        m_isResolvingResumePromises = true;
-        Platform::current()->mainThread()->getWebTaskRunner()->postTask(BLINK_FROM_HERE, threadSafeBind(&AbstractAudioContext::resolvePromisesForResumeOnMainThread, this));
-    }
-}
-
-void AbstractAudioContext::rejectPendingResolvers()
-{
-    ASSERT(isMainThread());
-
-    // Audio context is closing down so reject any resume promises that are still pending.
-
-    for (auto& resolver : m_resumeResolvers) {
-        resolver->reject(DOMException::create(InvalidStateError, "Audio context is going away"));
-    }
-    m_resumeResolvers.clear();
-    m_isResolvingResumePromises = false;
-
-    // Now reject any pending decodeAudioData resolvers
-    for (auto& resolver : m_decodeAudioResolvers)
-        resolver->reject(DOMException::create(InvalidStateError, "Audio context is going away"));
-    m_decodeAudioResolvers.clear();
-}
-
-const AtomicString& AbstractAudioContext::interfaceName() const
-{
-    return EventTargetNames::AudioContext;
-}
-
-ExecutionContext* AbstractAudioContext::getExecutionContext() const
-{
-    return ActiveDOMObject::getExecutionContext();
-}
-
-void AbstractAudioContext::startRendering()
-{
-    // This is called for both online and offline contexts.
-    ASSERT(isMainThread());
-    ASSERT(m_destinationNode);
-
-    if (m_contextState == Suspended) {
-        destination()->audioDestinationHandler().startRendering();
-        setContextState(Running);
-    }
-}
-
-DEFINE_TRACE(AbstractAudioContext)
-{
-    visitor->trace(m_destinationNode);
-    visitor->trace(m_listener);
-    // trace() can be called in AbstractAudioContext constructor, and
-    // m_contextGraphMutex might be unavailable.
-    if (m_didInitializeContextGraphMutex) {
-        AutoLocker lock(this);
-        visitor->trace(m_activeSourceNodes);
-    } else {
-        visitor->trace(m_activeSourceNodes);
-    }
-    visitor->trace(m_resumeResolvers);
-    visitor->trace(m_decodeAudioResolvers);
-
-    visitor->trace(m_periodicWaveSine);
-    visitor->trace(m_periodicWaveSquare);
-    visitor->trace(m_periodicWaveSawtooth);
-    visitor->trace(m_periodicWaveTriangle);
-    RefCountedGarbageCollectedEventTargetWithInlineData<AbstractAudioContext>::trace(visitor);
-    ActiveDOMObject::trace(visitor);
-}
-
-SecurityOrigin* AbstractAudioContext::getSecurityOrigin() const
-{
-    if (getExecutionContext())
-        return getExecutionContext()->getSecurityOrigin();
-
-    return nullptr;
-}
-
-} // namespace blink
-