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25 #ifndef BiquadProcessor_h
26 #define BiquadProcessor_h
28 #include "AudioDSPKernel.h"
29 #include "AudioDSPKernelProcessor.h"
30 #include "AudioNode.h"
31 #include "AudioParam.h"
33 #include <wtf/RefPtr.h>
37 // BiquadProcessor is an AudioDSPKernelProcessor which uses Biquad objects to implement several common filters.
39 class BiquadProcessor : public AudioDSPKernelProcessor {
52 BiquadProcessor(double sampleRate, size_t numberOfChannels, bool autoInitialize);
54 // Old constructor used by deprecated LowPass2FilterNode and HighPass2FilterNode
55 BiquadProcessor(FilterType, double sampleRate, size_t numberOfChannels, bool autoInitialize = true);
57 virtual ~BiquadProcessor();
59 virtual PassOwnPtr<AudioDSPKernel> createKernel();
61 virtual void process(AudioBus* source, AudioBus* destination, size_t framesToProcess);
63 bool filterCoefficientsDirty() const { return m_filterCoefficientsDirty; }
65 AudioParam* parameter1() { return m_parameter1.get(); }
66 AudioParam* parameter2() { return m_parameter2.get(); }
67 AudioParam* parameter3() { return m_parameter3.get(); }
69 FilterType type() const { return m_type; }
70 void setType(FilterType type) { m_type = type; }
75 RefPtr<AudioParam> m_parameter1;
76 RefPtr<AudioParam> m_parameter2;
77 RefPtr<AudioParam> m_parameter3;
79 // so DSP kernels know when to re-compute coefficients
80 bool m_filterCoefficientsDirty;
83 } // namespace WebCore
85 #endif // BiquadProcessor_h