1 /* 2 * Copyright (C) 2010, Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 15 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 16 * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY 17 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 18 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 19 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 20 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 22 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 23 */ 24 25 #ifndef ConvolverNode_h 26 #define ConvolverNode_h 27 28 #include "modules/webaudio/AudioNode.h" 29 #include "wtf/OwnPtr.h" 30 #include "wtf/RefPtr.h" 31 #include "wtf/ThreadingPrimitives.h" 32 33 namespace WebCore { 34 35 class AudioBuffer; 36 class ExceptionState; 37 class Reverb; 38 39 class ConvolverNode FINAL : public AudioNode { 40 public: create(AudioContext * context,float sampleRate)41 static PassRefPtrWillBeRawPtr<ConvolverNode> create(AudioContext* context, float sampleRate) 42 { 43 return adoptRefWillBeNoop(new ConvolverNode(context, sampleRate)); 44 } 45 46 virtual ~ConvolverNode(); 47 48 // AudioNode 49 virtual void process(size_t framesToProcess) OVERRIDE; 50 virtual void initialize() OVERRIDE; 51 virtual void uninitialize() OVERRIDE; 52 53 // Impulse responses 54 void setBuffer(AudioBuffer*, ExceptionState&); 55 AudioBuffer* buffer(); 56 normalize()57 bool normalize() const { return m_normalize; } setNormalize(bool normalize)58 void setNormalize(bool normalize) { m_normalize = normalize; } 59 60 virtual void trace(Visitor*) OVERRIDE; 61 62 private: 63 ConvolverNode(AudioContext*, float sampleRate); 64 65 virtual double tailTime() const OVERRIDE; 66 virtual double latencyTime() const OVERRIDE; 67 68 OwnPtr<Reverb> m_reverb; 69 RefPtrWillBeMember<AudioBuffer> m_buffer; 70 71 // This synchronizes dynamic changes to the convolution impulse response with process(). 72 mutable Mutex m_processLock; 73 74 // Normalize the impulse response or not. Must default to true. 75 bool m_normalize; 76 }; 77 78 } // namespace WebCore 79 80 #endif // ConvolverNode_h 81