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