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51 lines
867 B
51 lines
867 B
4 years ago
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/*
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mathDSP.h - Definitions and functions to support OpenAudio_ArduinoLibrary_F32
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Created by Bob Larkin 15 April 2020.
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*/
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#ifndef mathDSP_F32_h
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#define mathDSP_F32_h
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#ifndef M_PI_2
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#define M_PI_2 1.57079632679489661923
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#endif
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#ifndef M_PI
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#define M_PI 3.14159265358979323846
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#endif
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#ifndef M_TWOPI
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#define M_TWOPI 6.28318530717958647692
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#endif
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#ifndef MF_PI_2
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#define MF_PI_2 1.5707963f
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#endif
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#ifndef MF_PI
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#define MF_PI 3.14159265f
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#endif
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#ifndef MF_TWOPI
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#define MF_TWOPI 6.2831853f
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#endif
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class mathDSP_F32
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{
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public:
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float acos_f32(float x);
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float approxAcos(float x);
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float fastAtan2(float y, float x);
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float i0f(float x);
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private:
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// Support for FastAtan2(x,y)
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float _Atan(float z) {
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const float n1 = 0.97239411f;
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const float n2 = -0.19194795f;
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return (n1 + n2 * z * z) * z;
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}
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};
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#endif
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