Implement IIRFilter node for WebAudio.

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

 /*
  * 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 17 matching lines @@
 #include "bindings/core/v8/ScriptPromise.h"
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "core/dom/ActiveDOMObject.h"
 #include "core/dom/DOMTypedArray.h"
 #include "core/events/EventListener.h"
 #include "modules/EventTargetModules.h"
 #include "modules/ModulesExport.h"
 #include "modules/webaudio/AsyncAudioDecoder.h"
 #include "modules/webaudio/AudioDestinationNode.h"
 #include "modules/webaudio/DeferredTaskHandler.h"
+#include "modules/webaudio/IIRFilterNode.h"
 #include "platform/audio/AudioBus.h"
 #include "platform/heap/Handle.h"
 #include "wtf/HashSet.h"
 #include "wtf/MainThread.h"
 #include "wtf/RefPtr.h"
 #include "wtf/Threading.h"
 #include "wtf/Vector.h"
 #include "wtf/build_config.h"
 
 namespace blink {
 
 class AnalyserNode;
 class AudioBuffer;
 class AudioBufferCallback;
 class AudioBufferSourceNode;
 class AudioListener;
 class AudioSummingJunction;
 class BiquadFilterNode;
 class ChannelMergerNode;
 class ChannelSplitterNode;
 class ConvolverNode;
 class DelayNode;
 class Dictionary;
 class Document;
 class DynamicsCompressorNode;
 class ExceptionState;
 class GainNode;
 class HTMLMediaElement;
+class IIRFilterNode;
 class MediaElementAudioSourceNode;
 class MediaStreamAudioDestinationNode;
 class MediaStreamAudioSourceNode;
 class OscillatorNode;
 class PannerNode;
 class PeriodicWave;
 class ScriptProcessorNode;
 class ScriptPromiseResolver;
 class ScriptState;
 class SecurityOrigin;
@@ skipping 94 matching lines @@
 
     // Close
     virtual ScriptPromise closeContext(ScriptState*) = 0;
 
     // Suspend
     virtual ScriptPromise suspendContext(ScriptState*) = 0;
 
     // Resume
     virtual ScriptPromise resumeContext(ScriptState*) = 0;
 
+    // IIRFilter
+    IIRFilterNode* createIIRFilter(Vector<double> feedforwardCoef, Vector<double> feedbackCoef,
+        ExceptionState&);
+
     // When a source node has started processing and needs to be protected,
     // this method tells the context to protect the node.
     //
     // The context itself keeps a reference to all source nodes.  The source
     // nodes, then reference all nodes they're connected to.  In turn, these
     // nodes reference all nodes they're connected to.  All nodes are ultimately
     // connected to the AudioDestinationNode.  When the context release a source
     // node, it will be deactivated from the rendering graph along with all
     // other nodes it is uniquely connected to.
     void notifySourceNodeStartedProcessing(AudioNode*);
@@ skipping 152 matching lines @@
     Member<PeriodicWave> m_periodicWaveTriangle;
 
     // This is considering 32 is large enough for multiple channels audio.
     // It is somewhat arbitrary and could be increased if necessary.
     enum { MaxNumberOfChannels = 32 };
 };
 
 } // namespace blink
 
 #endif // AbstractAudioContext_h