C++ (Cpp) iirfilt_crcf_create Exemples

Exemple #1

Fichier : iirfilt_runtest.c Projet : Clivia/liquid-dsp

// autotest helper function
//  _b      :   filter coefficients (numerator)
//  _a      :   filter coefficients (denominator)
//  _h_len  :   filter coefficients length
//  _x      :   input array
//  _x_len  :   input array length
//  _y      :   output array
//  _y_len  :   output array length
void iirfilt_crcf_test(float *         _b,
                       float *         _a,
                       unsigned int    _h_len,
                       float complex * _x,
                       unsigned int    _x_len,
                       float complex * _y,
                       unsigned int    _y_len)
{
    float tol = 0.001f;

    // load filter coefficients externally
    iirfilt_crcf q = iirfilt_crcf_create(_b, _h_len, _a, _h_len);

    // allocate memory for output
    float complex y_test[_y_len];

    unsigned int i;
    // compute output
    for (i=0; i<_x_len; i++) {
        iirfilt_crcf_execute(q, _x[i], &y_test[i]);
        
        CONTEND_DELTA( crealf(y_test[i]), crealf(_y[i]), tol );
        CONTEND_DELTA( cimagf(y_test[i]), cimagf(_y[i]), tol );
    }
    
    // destroy filter object
    iirfilt_crcf_destroy(q);
}

Exemple #2

Fichier : iirfilt.example.c Projet : Sangstbk/liquid-dsp

int main() {
    // options
    unsigned int order=4;   // filter order

    unsigned int n = order+1;
    float b[n], a[n];

    // ... initialize filter coefficients ...

    // create filter object
    iirfilt_crcf q = iirfilt_crcf_create(b,n,a,n);

    float complex x;    // input sample
    float complex y;    // output sample
    
    // execute filter (repeat as necessary)
    iirfilt_crcf_execute(q,x,&y);

    // destroy filter object
    iirfilt_crcf_destroy(q);
}