28 #define REAL float  macro
112   REAL x;
121 static  REAL IIR_HP_highpass(IIR_HP *i, REAL in) {  in IIR_HP_highpass()
122     const REAL a0 = 0.01f;      /* controls Transfer Frequency */  in IIR_HP_highpass()
136   REAL z[18];
143   REAL highpass(REAL in) {  in highpass()
144     const REAL a[18] = {  in highpass()
154     memmove(z + 1, z, 17 * sizeof(REAL));  in highpass()
156     REAL sum0 = 0.0, sum1 = 0.0;  in highpass()
177   REAL z[36];
186 static  REAL FIR_HP_300Hz_highpass(FIR_HP_300Hz *f, REAL in) {  in FIR_HP_300Hz_highpass()
187     REAL sum0 = 0.0, sum1 = 0.0;  in FIR_HP_300Hz_highpass()
189     const REAL a[36] = {  in FIR_HP_300Hz_highpass()
203     memmove(f->z + 1, f->z, 35 * sizeof(REAL));  in FIR_HP_300Hz_highpass()
230   REAL in0, out0;
231   REAL a0, a1, b1;
240 static  IIR1* IIR1_init(REAL Fc) {  in IIR1_init()
250 static  REAL IIR1_highpass(IIR1 *i, REAL in) {  in IIR1_highpass()
251     REAL out = i->a0 * in + i->a1 * i->in0 + i->b1 * i->out0;  in IIR1_highpass()
264   REAL x[2], y[2];
271   REAL highpass(REAL in) {
274     const REAL a[] = { 0.29289323f, -0.58578646f, 0.29289323f };
275     const REAL b[] = { 1.3007072E-16f, 0.17157288f };
276     REAL out =
301   REAL gain;                    // Mic signal amplify
305   REAL dfast, xfast;
306   REAL dslow, xslow;
309   REAL x[NLMS_LEN + NLMS_EXT];  // tap delayed loudspeaker signal
310   REAL xf[NLMS_LEN + NLMS_EXT]; // pre-whitening tap delayed signal
311   REAL w_arr[NLMS_LEN + (16 / sizeof(REAL))]; // tap weights
312   REAL *w;                      // this will be a 16-byte aligned pointer into w_arr
321   REAL ws[DUMP_LEN];            // tap weights sums
330   REAL (*dotp) (REAL[], REAL[]);
339 static  float AEC_dtd(AEC *a, REAL d, REAL x);
352 static  REAL AEC_nlms_pw(AEC *a, REAL d, REAL x_, float stepsize);