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 AnalyserNode_h 26 #define AnalyserNode_h 27 28 #include "modules/webaudio/AudioBasicInspectorNode.h" 29 #include "modules/webaudio/RealtimeAnalyser.h" 30 #include "wtf/Forward.h" 31 32 namespace WebCore { 33 34 class ExceptionState; 35 36 class AnalyserNode : public AudioBasicInspectorNode { 37 public: 38 static PassRefPtr<AnalyserNode> create(AudioContext* context, float sampleRate) 39 { 40 return adoptRef(new AnalyserNode(context, sampleRate)); 41 } 42 43 virtual ~AnalyserNode(); 44 45 // AudioNode 46 virtual void process(size_t framesToProcess); 47 virtual void reset(); 48 49 // Javascript bindings 50 unsigned fftSize() const { return m_analyser.fftSize(); } 51 void setFftSize(unsigned size, ExceptionState&); 52 53 unsigned frequencyBinCount() const { return m_analyser.frequencyBinCount(); } 54 55 void setMinDecibels(float k, ExceptionState&); 56 float minDecibels() const { return m_analyser.minDecibels(); } 57 58 void setMaxDecibels(float k, ExceptionState&); 59 float maxDecibels() const { return m_analyser.maxDecibels(); } 60 61 void setSmoothingTimeConstant(float k, ExceptionState&); 62 float smoothingTimeConstant() const { return m_analyser.smoothingTimeConstant(); } 63 64 void getFloatFrequencyData(Float32Array* array) { m_analyser.getFloatFrequencyData(array); } 65 void getByteFrequencyData(Uint8Array* array) { m_analyser.getByteFrequencyData(array); } 66 void getByteTimeDomainData(Uint8Array* array) { m_analyser.getByteTimeDomainData(array); } 67 68 private: 69 virtual double tailTime() const OVERRIDE { return 0; } 70 virtual double latencyTime() const OVERRIDE { return 0; } 71 72 AnalyserNode(AudioContext*, float sampleRate); 73 74 RealtimeAnalyser m_analyser; 75 }; 76 77 } // namespace WebCore 78 79 #endif // AnalyserNode_h 80
