Implement BaseAudioContext

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

 /*
  * 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 "modules/webaudio/BaseAudioContext.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"
@@ skipping 27 matching lines @@
 #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)
+BaseAudioContext* BaseAudioContext::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)
+BaseAudioContext::BaseAudioContext(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)
+BaseAudioContext::BaseAudioContext(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()
+BaseAudioContext::~BaseAudioContext()
 {
     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()
+void BaseAudioContext::initialize()
 {
     if (isDestinationInitialized())
         return;
 
     FFTFrame::initialize();
     m_listener = AudioListener::create();
 
     if (m_destinationNode.get()) {
         m_destinationNode->handler().initialize();
     }
 }
 
-void AbstractAudioContext::clear()
+void BaseAudioContext::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()
+void BaseAudioContext::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()
+void BaseAudioContext::stop()
 {
     uninitialize();
 }
 
-bool AbstractAudioContext::hasPendingActivity() const
+bool BaseAudioContext::hasPendingActivity() const
 {
     // There's no pending activity if the audio context has been cleared.
     return !m_isCleared;
 }
 
-void AbstractAudioContext::throwExceptionForClosedState(ExceptionState& exceptionState)
+void BaseAudioContext::throwExceptionForClosedState(ExceptionState& exceptionState)
 {
     exceptionState.throwDOMException(InvalidStateError, "AudioContext has been closed.");
 }
 
-AudioBuffer* AbstractAudioContext::createBuffer(unsigned numberOfChannels, size_t numberOfFrames, float sampleRate, ExceptionState& exceptionState)
+AudioBuffer* BaseAudioContext::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)
+ScriptPromise BaseAudioContext::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)
+void BaseAudioContext::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)
+AudioBufferSourceNode* BaseAudioContext::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)
+ScriptProcessorNode* BaseAudioContext::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)
+ScriptProcessorNode* BaseAudioContext::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)
+ScriptProcessorNode* BaseAudioContext::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)
+ScriptProcessorNode* BaseAudioContext::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()) {
+        } else if (numberOfInputChannels > BaseAudioContext::maxNumberOfChannels()) {
             exceptionState.throwDOMException(
                 IndexSizeError,
                 "number of input channels (" + String::number(numberOfInputChannels)
                 + ") exceeds maximum ("
-                + String::number(AbstractAudioContext::maxNumberOfChannels()) + ").");
-        } else if (numberOfOutputChannels > AbstractAudioContext::maxNumberOfChannels()) {
+                + String::number(BaseAudioContext::maxNumberOfChannels()) + ").");
+        } else if (numberOfOutputChannels > BaseAudioContext::maxNumberOfChannels()) {
             exceptionState.throwDOMException(
                 IndexSizeError,
                 "number of output channels (" + String::number(numberOfInputChannels)
                 + ") exceeds maximum ("
-                + String::number(AbstractAudioContext::maxNumberOfChannels()) + ").");
+                + String::number(BaseAudioContext::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)
+StereoPannerNode* BaseAudioContext::createStereoPanner(ExceptionState& exceptionState)
 {
     ASSERT(isMainThread());
     if (isContextClosed()) {
         throwExceptionForClosedState(exceptionState);
         return nullptr;
     }
 
     return StereoPannerNode::create(*this, sampleRate());
 }
 
-BiquadFilterNode* AbstractAudioContext::createBiquadFilter(ExceptionState& exceptionState)
+BiquadFilterNode* BaseAudioContext::createBiquadFilter(ExceptionState& exceptionState)
 {
     ASSERT(isMainThread());
     if (isContextClosed()) {
         throwExceptionForClosedState(exceptionState);
         return nullptr;
     }
 
     return BiquadFilterNode::create(*this, sampleRate());
 }
 
-WaveShaperNode* AbstractAudioContext::createWaveShaper(ExceptionState& exceptionState)
+WaveShaperNode* BaseAudioContext::createWaveShaper(ExceptionState& exceptionState)
 {
     ASSERT(isMainThread());
     if (isContextClosed()) {
         throwExceptionForClosedState(exceptionState);
         return nullptr;
     }
 
     return WaveShaperNode::create(*this);
 }
 
-PannerNode* AbstractAudioContext::createPanner(ExceptionState& exceptionState)
+PannerNode* BaseAudioContext::createPanner(ExceptionState& exceptionState)
 {
     ASSERT(isMainThread());
     if (isContextClosed()) {
         throwExceptionForClosedState(exceptionState);
         return nullptr;
     }
 
     return PannerNode::create(*this, sampleRate());
 }
 
-ConvolverNode* AbstractAudioContext::createConvolver(ExceptionState& exceptionState)
+ConvolverNode* BaseAudioContext::createConvolver(ExceptionState& exceptionState)
 {
     ASSERT(isMainThread());
     if (isContextClosed()) {
         throwExceptionForClosedState(exceptionState);
         return nullptr;
     }
 
     return ConvolverNode::create(*this, sampleRate());
 }
 
-DynamicsCompressorNode* AbstractAudioContext::createDynamicsCompressor(ExceptionState& exceptionState)
+DynamicsCompressorNode* BaseAudioContext::createDynamicsCompressor(ExceptionState& exceptionState)
 {
     ASSERT(isMainThread());
     if (isContextClosed()) {
         throwExceptionForClosedState(exceptionState);
         return nullptr;
     }
 
     return DynamicsCompressorNode::create(*this, sampleRate());
 }
 
-AnalyserNode* AbstractAudioContext::createAnalyser(ExceptionState& exceptionState)
+AnalyserNode* BaseAudioContext::createAnalyser(ExceptionState& exceptionState)
 {
     ASSERT(isMainThread());
     if (isContextClosed()) {
         throwExceptionForClosedState(exceptionState);
         return nullptr;
     }
 
     return AnalyserNode::create(*this, sampleRate());
 }
 
-GainNode* AbstractAudioContext::createGain(ExceptionState& exceptionState)
+GainNode* BaseAudioContext::createGain(ExceptionState& exceptionState)
 {
     ASSERT(isMainThread());
     if (isContextClosed()) {
         throwExceptionForClosedState(exceptionState);
         return nullptr;
     }
 
     return GainNode::create(*this, sampleRate());
 }
 
-DelayNode* AbstractAudioContext::createDelay(ExceptionState& exceptionState)
+DelayNode* BaseAudioContext::createDelay(ExceptionState& exceptionState)
 {
     const double defaultMaxDelayTime = 1;
     return createDelay(defaultMaxDelayTime, exceptionState);
 }
 
-DelayNode* AbstractAudioContext::createDelay(double maxDelayTime, ExceptionState& exceptionState)
+DelayNode* BaseAudioContext::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)
+ChannelSplitterNode* BaseAudioContext::createChannelSplitter(ExceptionState& exceptionState)
 {
     const unsigned ChannelSplitterDefaultNumberOfOutputs = 6;
     return createChannelSplitter(ChannelSplitterDefaultNumberOfOutputs, exceptionState);
 }
 
-ChannelSplitterNode* AbstractAudioContext::createChannelSplitter(size_t numberOfOutputs, ExceptionState& exceptionState)
+ChannelSplitterNode* BaseAudioContext::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()) + ".");
+            + String::number(BaseAudioContext::maxNumberOfChannels()) + ".");
         return nullptr;
     }
 
     return node;
 }
 
-ChannelMergerNode* AbstractAudioContext::createChannelMerger(ExceptionState& exceptionState)
+ChannelMergerNode* BaseAudioContext::createChannelMerger(ExceptionState& exceptionState)
 {
     const unsigned ChannelMergerDefaultNumberOfInputs = 6;
     return createChannelMerger(ChannelMergerDefaultNumberOfInputs, exceptionState);
 }
 
-ChannelMergerNode* AbstractAudioContext::createChannelMerger(size_t numberOfInputs, ExceptionState& exceptionState)
+ChannelMergerNode* BaseAudioContext::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(),
+                BaseAudioContext::maxNumberOfChannels(),
                 ExceptionMessages::InclusiveBound));
         return nullptr;
     }
 
     return node;
 }
 
-OscillatorNode* AbstractAudioContext::createOscillator(ExceptionState& exceptionState)
+OscillatorNode* BaseAudioContext::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)
+PeriodicWave* BaseAudioContext::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)
+PeriodicWave* BaseAudioContext::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)
+IIRFilterNode* BaseAudioContext::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(
@@ skipping 63 matching lines @@
             exceptionState.throwDOMException(
                 InvalidStateError,
                 ExceptionMessages::notAFiniteNumber(c, name.ascii().data()));
             return nullptr;
         }
     }
 
     return IIRFilterNode::create(*this, sampleRate(), feedforwardCoef, feedbackCoef);
 }
 
-PeriodicWave* AbstractAudioContext::periodicWave(int type)
+PeriodicWave* BaseAudioContext::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
+String BaseAudioContext::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)
+void BaseAudioContext::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));
+        getExecutionContext()->postTask(BLINK_FROM_HERE, createSameThreadTask(&BaseAudioContext::notifyStateChange, this));
 }
 
-void AbstractAudioContext::notifyStateChange()
+void BaseAudioContext::notifyStateChange()
 {
     dispatchEvent(Event::create(EventTypeNames::statechange));
 }
 
-void AbstractAudioContext::notifySourceNodeFinishedProcessing(AudioHandler* handler)
+void BaseAudioContext::notifySourceNodeFinishedProcessing(AudioHandler* handler)
 {
     ASSERT(isAudioThread());
     m_finishedSourceHandlers.append(handler);
 }
 
-void AbstractAudioContext::releaseFinishedSourceNodes()
+void BaseAudioContext::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)
+void BaseAudioContext::notifySourceNodeStartedProcessing(AudioNode* node)
 {
     ASSERT(isMainThread());
     AutoLocker locker(this);
 
     m_activeSourceNodes.append(node);
     node->handler().makeConnection();
 }
 
-void AbstractAudioContext::releaseActiveSourceNodes()
+void BaseAudioContext::releaseActiveSourceNodes()
 {
     ASSERT(isMainThread());
     for (auto& sourceNode : m_activeSourceNodes)
         sourceNode->handler().breakConnection();
 
     m_activeSourceNodes.clear();
 }
 
-void AbstractAudioContext::handleStoppableSourceNodes()
+void BaseAudioContext::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()
+void BaseAudioContext::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()
+void BaseAudioContext::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()
+void BaseAudioContext::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()
+void BaseAudioContext::resolvePromisesForResume()
 {
-    // This runs inside the AbstractAudioContext's lock when handling pre-render tasks.
+    // This runs inside the BaseAudioContext'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));
+        Platform::current()->mainThread()->getWebTaskRunner()->postTask(BLINK_FROM_HERE, threadSafeBind(&BaseAudioContext::resolvePromisesForResumeOnMainThread, this));
     }
 }
 
-void AbstractAudioContext::rejectPendingResolvers()
+void BaseAudioContext::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
+const AtomicString& BaseAudioContext::interfaceName() const
 {
     return EventTargetNames::AudioContext;
 }
 
-ExecutionContext* AbstractAudioContext::getExecutionContext() const
+ExecutionContext* BaseAudioContext::getExecutionContext() const
 {
     return ActiveDOMObject::getExecutionContext();
 }
 
-void AbstractAudioContext::startRendering()
+void BaseAudioContext::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)
+DEFINE_TRACE(BaseAudioContext)
 {
     visitor->trace(m_destinationNode);
     visitor->trace(m_listener);
-    // trace() can be called in AbstractAudioContext constructor, and
+    // trace() can be called in BaseAudioContext 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);
+    RefCountedGarbageCollectedEventTargetWithInlineData<BaseAudioContext>::trace(visitor);
     ActiveDOMObject::trace(visitor);
 }
 
-SecurityOrigin* AbstractAudioContext::getSecurityOrigin() const
+SecurityOrigin* BaseAudioContext::getSecurityOrigin() const
 {
     if (getExecutionContext())
         return getExecutionContext()->getSecurityOrigin();
 
     return nullptr;
 }
 
 } // namespace blink