Use nullptr_t for RefPtr, PassRefPtr and RawPtr.

Source/modules/webaudio/AudioContext.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
@@ skipping 78 matching lines @@
 const unsigned MaxHardwareContexts = 6;
 unsigned AudioContext::s_hardwareContextCount = 0;
 
 PassRefPtr<AudioContext> AudioContext::create(Document& document, ExceptionState& exceptionState)
 {
     ASSERT(isMainThread());
     if (s_hardwareContextCount >= MaxHardwareContexts) {
         exceptionState.throwDOMException(
             SyntaxError,
             "number of hardware contexts reached maximum (" + String::number(MaxHardwareContexts) + ").");
-        return 0;
+        return nullptr;
     }
 
     RefPtr<AudioContext> audioContext(adoptRef(new AudioContext(&document)));
     audioContext->suspendIfNeeded();
     return audioContext.release();
 }
 
 PassRefPtr<AudioContext> AudioContext::create(Document& document, unsigned numberOfChannels, size_t numberOfFrames, float sampleRate, ExceptionState& exceptionState)
 {
     document.addConsoleMessage(JSMessageSource, WarningMessageLevel, "Deprecated AudioContext constructor: use OfflineAudioContext instead");
     return OfflineAudioContext::create(&document, numberOfChannels, numberOfFrames, sampleRate, exceptionState);
 }
 
 // Constructor for rendering to the audio hardware.
 AudioContext::AudioContext(Document* document)
     : ActiveDOMObject(document)
     , m_isStopScheduled(false)
     , m_isInitialized(false)
     , m_isAudioThreadFinished(false)
-    , m_destinationNode(0)
+    , m_destinationNode(nullptr)
     , m_isDeletionScheduled(false)
     , m_automaticPullNodesNeedUpdating(false)
     , m_connectionCount(0)
     , m_audioThread(0)
     , m_graphOwnerThread(UndefinedThreadIdentifier)
     , m_isOfflineContext(false)
     , m_activeSourceCount(0)
 {
     constructCommon();
 
     m_destinationNode = DefaultAudioDestinationNode::create(this);
 
     // This sets in motion an asynchronous loading mechanism on another thread.
     // We can check m_hrtfDatabaseLoader->isLoaded() to find out whether or not it has been fully loaded.
     // It's not that useful to have a callback function for this since the audio thread automatically starts rendering on the graph
     // when this has finished (see AudioDestinationNode).
     m_hrtfDatabaseLoader = HRTFDatabaseLoader::createAndLoadAsynchronouslyIfNecessary(sampleRate());
 }
 
 // Constructor for offline (non-realtime) rendering.
 AudioContext::AudioContext(Document* document, unsigned numberOfChannels, size_t numberOfFrames, float sampleRate)
     : ActiveDOMObject(document)
     , m_isStopScheduled(false)
     , m_isInitialized(false)
     , m_isAudioThreadFinished(false)
-    , m_destinationNode(0)
+    , m_destinationNode(nullptr)
     , m_automaticPullNodesNeedUpdating(false)
     , m_connectionCount(0)
     , m_audioThread(0)
     , m_graphOwnerThread(UndefinedThreadIdentifier)
     , m_isOfflineContext(true)
     , m_activeSourceCount(0)
 {
     constructCommon();
 
     m_hrtfDatabaseLoader = HRTFDatabaseLoader::createAndLoadAsynchronouslyIfNecessary(sampleRate);
@@ skipping 157 matching lines @@
             exceptionState.throwDOMException(
                 NotSupportedError,
                 "number of frames must be greater than 0.");
         } else {
             exceptionState.throwDOMException(
                 NotSupportedError,
                 "unable to create buffer of " + String::number(numberOfChannels)
                 + " channel(s) of " + String::number(numberOfFrames)
                 + " frames each.");
         }
-        return 0;
+        return nullptr;
     }
 
     return audioBuffer;
 }
 
 PassRefPtr<AudioBuffer> AudioContext::createBuffer(ArrayBuffer* arrayBuffer, bool mixToMono, ExceptionState& exceptionState)
 {
     ASSERT(arrayBuffer);
     if (!arrayBuffer) {
         exceptionState.throwDOMException(
             SyntaxError,
             "invalid ArrayBuffer.");
-        return 0;
+        return nullptr;
     }
 
     RefPtr<AudioBuffer> audioBuffer = AudioBuffer::createFromAudioFileData(arrayBuffer->data(), arrayBuffer->byteLength(), mixToMono, sampleRate());
     if (!audioBuffer.get()) {
         exceptionState.throwDOMException(
             SyntaxError,
             "invalid audio data in ArrayBuffer.");
-        return 0;
+        return nullptr;
     }
 
     return audioBuffer;
 }
 
 void AudioContext::decodeAudioData(ArrayBuffer* audioData, PassOwnPtr<AudioBufferCallback> successCallback, PassOwnPtr<AudioBufferCallback> errorCallback, ExceptionState& exceptionState)
 {
     if (!audioData) {
         exceptionState.throwDOMException(
             SyntaxError,
@@ skipping 15 matching lines @@
 
     return node;
 }
 
 PassRefPtr<MediaElementAudioSourceNode> AudioContext::createMediaElementSource(HTMLMediaElement* mediaElement, ExceptionState& exceptionState)
 {
     if (!mediaElement) {
         exceptionState.throwDOMException(
             InvalidStateError,
             "invalid HTMLMedialElement.");
-        return 0;
+        return nullptr;
     }
 
     ASSERT(isMainThread());
     lazyInitialize();
 
     // First check if this media element already has a source node.
     if (mediaElement->audioSourceNode()) {
         exceptionState.throwDOMException(
             InvalidStateError,
             "invalid HTMLMediaElement.");
-        return 0;
+        return nullptr;
     }
 
     RefPtr<MediaElementAudioSourceNode> node = MediaElementAudioSourceNode::create(this, mediaElement);
 
     mediaElement->setAudioSourceNode(node.get());
 
     refNode(node.get()); // context keeps reference until node is disconnected
     return node;
 }
 
 PassRefPtr<MediaStreamAudioSourceNode> AudioContext::createMediaStreamSource(MediaStream* mediaStream, ExceptionState& exceptionState)
 {
     if (!mediaStream) {
         exceptionState.throwDOMException(
             InvalidStateError,
             "invalid MediaStream source");
-        return 0;
+        return nullptr;
     }
 
     ASSERT(isMainThread());
     lazyInitialize();
 
     AudioSourceProvider* provider = 0;
 
     MediaStreamTrackVector audioTracks = mediaStream->getAudioTracks();
     RefPtr<MediaStreamTrack> audioTrack;
 
@@ skipping 62 matching lines @@
                 IndexSizeError,
                 "number of output channels (" + String::number(numberOfInputChannels)
                 + ") exceeds maximum ("
                 + String::number(AudioContext::maxNumberOfChannels()) + ").");
         } else {
             exceptionState.throwDOMException(
                 IndexSizeError,
                 "buffer size (" + String::number(bufferSize)
                 + ") must be a power of two between 256 and 16384.");
         }
-        return 0;
+        return nullptr;
     }
 
     refNode(node.get()); // context keeps reference until we stop making javascript rendering callbacks
     return node;
 }
 
 PassRefPtr<BiquadFilterNode> AudioContext::createBiquadFilter()
 {
     ASSERT(isMainThread());
     lazyInitialize();
@@ skipping 47 matching lines @@
     const double defaultMaxDelayTime = 1;
     return createDelay(defaultMaxDelayTime, exceptionState);
 }
 
 PassRefPtr<DelayNode> AudioContext::createDelay(double maxDelayTime, ExceptionState& exceptionState)
 {
     ASSERT(isMainThread());
     lazyInitialize();
     RefPtr<DelayNode> node = DelayNode::create(this, m_destinationNode->sampleRate(), maxDelayTime, exceptionState);
     if (exceptionState.hadException())
-        return 0;
+        return nullptr;
     return node;
 }
 
 PassRefPtr<ChannelSplitterNode> AudioContext::createChannelSplitter(ExceptionState& exceptionState)
 {
     const unsigned ChannelSplitterDefaultNumberOfOutputs = 6;
     return createChannelSplitter(ChannelSplitterDefaultNumberOfOutputs, exceptionState);
 }
 
 PassRefPtr<ChannelSplitterNode> AudioContext::createChannelSplitter(size_t numberOfOutputs, ExceptionState& exceptionState)
 {
     ASSERT(isMainThread());
     lazyInitialize();
 
     RefPtr<ChannelSplitterNode> node = ChannelSplitterNode::create(this, m_destinationNode->sampleRate(), numberOfOutputs);
 
     if (!node.get()) {
         exceptionState.throwDOMException(
             IndexSizeError,
             "number of outputs (" + String::number(numberOfOutputs)
             + ") must be between 1 and "
             + String::number(AudioContext::maxNumberOfChannels()) + ".");
-        return 0;
+        return nullptr;
     }
 
     return node;
 }
 
 PassRefPtr<ChannelMergerNode> AudioContext::createChannelMerger(ExceptionState& exceptionState)
 {
     const unsigned ChannelMergerDefaultNumberOfInputs = 6;
     return createChannelMerger(ChannelMergerDefaultNumberOfInputs, exceptionState);
 }
 
 PassRefPtr<ChannelMergerNode> AudioContext::createChannelMerger(size_t numberOfInputs, ExceptionState& exceptionState)
 {
     ASSERT(isMainThread());
     lazyInitialize();
 
     RefPtr<ChannelMergerNode> node = ChannelMergerNode::create(this, m_destinationNode->sampleRate(), numberOfInputs);
 
     if (!node.get()) {
         exceptionState.throwDOMException(
             IndexSizeError,
             "number of inputs (" + String::number(numberOfInputs)
             + ") must be between 1 and "
             + String::number(AudioContext::maxNumberOfChannels()) + ".");
-        return 0;
+        return nullptr;
     }
 
     return node;
 }
 
 PassRefPtr<OscillatorNode> AudioContext::createOscillator()
 {
     ASSERT(isMainThread());
     lazyInitialize();
 
     RefPtr<OscillatorNode> node = OscillatorNode::create(this, m_destinationNode->sampleRate());
 
     // Because this is an AudioScheduledSourceNode, the context keeps a reference until it has finished playing.
     // When this happens, AudioScheduledSourceNode::finish() calls AudioContext::notifyNodeFinishedProcessing().
     refNode(node.get());
 
     return node;
 }
 
 PassRefPtr<PeriodicWave> AudioContext::createPeriodicWave(Float32Array* real, Float32Array* imag, ExceptionState& exceptionState)
 {
     ASSERT(isMainThread());
 
     if (!real) {
         exceptionState.throwDOMException(
             SyntaxError,
             "invalid real array");
-        return 0;
+        return nullptr;
     }
 
     if (!imag) {
         exceptionState.throwDOMException(
             SyntaxError,
             "invalid imaginary array");
-        return 0;
+        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 0;
+        return nullptr;
     }
 
     if (real->length() > 4096) {
         exceptionState.throwDOMException(
             IndexSizeError,
             "length of real array (" + String::number(real->length())
             + ") exceeds allowed maximum of 4096");
-        return 0;
+        return nullptr;
     }
 
     if (imag->length() > 4096) {
         exceptionState.throwDOMException(
             IndexSizeError,
             "length of imaginary array (" + String::number(imag->length())
             + ") exceeds allowed maximum of 4096");
-        return 0;
+        return nullptr;
     }
 
     lazyInitialize();
     return PeriodicWave::create(sampleRate(), real, imag);
 }
 
 void AudioContext::notifyNodeFinishedProcessing(AudioNode* node)
 {
     ASSERT(isAudioThread());
     m_finishedNodes.append(node);
@@ skipping 379 matching lines @@
 }
 
 void AudioContext::decrementActiveSourceCount()
 {
     atomicDecrement(&m_activeSourceCount);
 }
 
 } // namespace WebCore
 
 #endif // ENABLE(WEB_AUDIO)