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 blink { 34 35 class AudioBuffer; 36 class ExceptionState; 37 class Reverb; 38 39 class ConvolverNode FINAL : public AudioNode { 40 DEFINE_WRAPPERTYPEINFO(); 41 public: create(AudioContext * context,float sampleRate)42 static ConvolverNode* create(AudioContext* context, float sampleRate) 43 { 44 return adoptRefCountedGarbageCollectedWillBeNoop(new ConvolverNode(context, sampleRate)); 45 } 46 47 virtual ~ConvolverNode(); 48 49 // AudioNode 50 virtual void dispose() OVERRIDE; 51 virtual void process(size_t framesToProcess) OVERRIDE; 52 virtual void initialize() OVERRIDE; 53 virtual void uninitialize() OVERRIDE; 54 55 // Impulse responses 56 void setBuffer(AudioBuffer*, ExceptionState&); 57 AudioBuffer* buffer(); 58 normalize()59 bool normalize() const { return m_normalize; } setNormalize(bool normalize)60 void setNormalize(bool normalize) { m_normalize = normalize; } 61 62 virtual void trace(Visitor*) OVERRIDE; 63 64 private: 65 ConvolverNode(AudioContext*, float sampleRate); 66 67 virtual double tailTime() const OVERRIDE; 68 virtual double latencyTime() const OVERRIDE; 69 70 OwnPtr<Reverb> m_reverb; 71 Member<AudioBuffer> m_buffer; 72 73 // This synchronizes dynamic changes to the convolution impulse response with process(). 74 mutable Mutex m_processLock; 75 76 // Normalize the impulse response or not. Must default to true. 77 bool m_normalize; 78 }; 79 80 } // namespace blink 81 82 #endif // ConvolverNode_h 83