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 blink { 33 34 class ExceptionState; 35 36 class AnalyserNode FINAL : public AudioBasicInspectorNode { 37 DEFINE_WRAPPERTYPEINFO(); 38 public: 39 static AnalyserNode* create(AudioContext* context, float sampleRate) 40 { 41 return adoptRefCountedGarbageCollectedWillBeNoop(new AnalyserNode(context, sampleRate)); 42 } 43 44 virtual ~AnalyserNode(); 45 46 // AudioNode 47 virtual void dispose() OVERRIDE; 48 virtual void process(size_t framesToProcess) OVERRIDE; 49 50 // Javascript bindings 51 unsigned fftSize() const { return m_analyser.fftSize(); } 52 void setFftSize(unsigned size, ExceptionState&); 53 54 unsigned frequencyBinCount() const { return m_analyser.frequencyBinCount(); } 55 56 void setMinDecibels(double k, ExceptionState&); 57 double minDecibels() const { return m_analyser.minDecibels(); } 58 59 void setMaxDecibels(double k, ExceptionState&); 60 double maxDecibels() const { return m_analyser.maxDecibels(); } 61 62 void setSmoothingTimeConstant(double k, ExceptionState&); 63 double smoothingTimeConstant() const { return m_analyser.smoothingTimeConstant(); } 64 65 void getFloatFrequencyData(Float32Array* array) { m_analyser.getFloatFrequencyData(array); } 66 void getByteFrequencyData(Uint8Array* array) { m_analyser.getByteFrequencyData(array); } 67 void getFloatTimeDomainData(Float32Array* array) { m_analyser.getFloatTimeDomainData(array); } 68 void getByteTimeDomainData(Uint8Array* array) { m_analyser.getByteTimeDomainData(array); } 69 private: 70 virtual double tailTime() const OVERRIDE { return 0; } 71 virtual double latencyTime() const OVERRIDE { return 0; } 72 73 AnalyserNode(AudioContext*, float sampleRate); 74 75 RealtimeAnalyser m_analyser; 76 }; 77 78 } // namespace blink 79 80 #endif // AnalyserNode_h 81
