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25 #ifndef BiquadFilterNode_h
26 #define BiquadFilterNode_h
28 #include "AudioBasicProcessorNode.h"
29 #include "BiquadProcessor.h"
35 class BiquadFilterNode : public AudioBasicProcessorNode {
37 // These must be defined as in the .idl file and must match those in the BiquadProcessor class.
49 static PassRefPtr<BiquadFilterNode> create(AudioContext* context, float sampleRate)
51 return adoptRef(new BiquadFilterNode(context, sampleRate));
54 unsigned short type() { return biquadProcessor()->type(); }
55 void setType(unsigned short type, ExceptionCode&);
57 AudioParam* frequency() { return biquadProcessor()->parameter1(); }
58 AudioParam* q() { return biquadProcessor()->parameter2(); }
59 AudioParam* gain() { return biquadProcessor()->parameter3(); }
61 // Get the magnitude and phase response of the filter at the given
62 // set of frequencies (in Hz). The phase response is in radians.
63 void getFrequencyResponse(const Float32Array* frequencyHz,
64 Float32Array* magResponse,
65 Float32Array* phaseResponse);
67 BiquadFilterNode(AudioContext*, float sampleRate);
69 BiquadProcessor* biquadProcessor() { return static_cast<BiquadProcessor*>(processor()); }
72 } // namespace WebCore
74 #endif // BiquadFilterNode_h