/*
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* eq.h
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* Description:
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*
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* Created on: 2014-10-8
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* Author: Graydon
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* Modify:
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*/
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#ifndef EQ_H_
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#define EQ_H_
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typedef enum {
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eq_lpf,
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eq_hpf,
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eq_bpf_pq, //(constant skirt gain, peak gain = Q)
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eq_bpf_zero, //(constant 0 dB peak gain)
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eq_notch,
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eq_apf,
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eq_peaking_eq, //peq_peak_3dB
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eq_lowshelf,
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eq_highshelf,
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eq_geq,
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eq_constQ, //peq_zero_3dB
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eq_count,
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}eq_type_t;
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typedef enum{
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peq_zero_3dB, //bw at 3dB frequency
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peq_middle,
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peq_peak_3dB, //bw at above or below peaking 3dB frequency
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}peq_bw;
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/*description: Create ParametricEQ handle.
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*@param1: sample rate
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*@param2: sample number per frame
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*@param3: The number of ParametricEQ sections
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*return: The handle
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*/
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void* alg_eq_create(int smpRate,int smpNum,int nsections);
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/*description: ParametricEQ handle.
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*@param1: sample rate
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*return: none
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*/
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void alg_eq_destroy(void* h);
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/*description: Set ParametricEQ 's param.
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*@param1: ParametricEQ handle
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*@param2: select the section from total sections of ParametricEQ
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*@param3: ParametricEQ's frequency
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*@param4: ParametricEQ's Gain
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*@param5: ParametricEQ's Q
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*return: None
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*/
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void alg_eq_set_param(void* h,int nsection,eq_type_t type ,int bypass,float freqency,float gain,float Q);
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/*description: ParametricEQ process function.
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*@param1: ParametricEQ handle
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*@param2: audio data Input
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*@param3: proceeded data output
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*return: 0-successful
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*/
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int alg_eq_filter(void* h , const float *data_in, float *data_out);
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float alg_geq_get_q(void* h, int nsections, int oct_type);
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void callEQcoeffs(eq_type_t type , float f0,float g,float q,int fs, __OUT float *b,__OUT float *a);
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void call_peaking_eq2(peq_bw bw_type ,float fc, float gain, float q, int fs, __OUT float *coef_b, __OUT float *coef_a);
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void alg_eq_acc_coeffs(int smpRate, int nsection ,eq_type_t type,float freqency,float gain,float q, __OUT float* pcoeffs);
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#endif /* EQ_H_ */
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