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@@ -1,6 +1,6 @@ |
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/* |
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Copyright (C) 2003-2008 Fons Adriaensen <fons@kokkinizita.net> |
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This program is free software; you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation; either version 2 of the License, or |
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@@ -24,135 +24,145 @@ |
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#include <unistd.h> |
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#include <jack/jack.h> |
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class Freq |
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struct Freq |
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{ |
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public: |
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int p; |
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int f; |
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float a; |
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float xa; |
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float ya; |
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float xf; |
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float yf; |
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float x1; |
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float y1; |
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float x2; |
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float y2; |
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}; |
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class MTDM |
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{ |
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public: |
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MTDM (void); |
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int process (size_t len, float *inp, float *out); |
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int resolve (void); |
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void invert (void) { _inv ^= 1; } |
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int inv (void) { return _inv; } |
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double del (void) { return _del; } |
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double err (void) { return _err; } |
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struct MTDM |
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{ |
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double _del; |
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double _err; |
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float _wlp; |
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int _cnt; |
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int _inv; |
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Freq _freq [5]; |
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struct Freq _freq [13]; |
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}; |
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MTDM::MTDM (void) : _cnt (0), _inv (0) |
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struct MTDM * mtdm_new (double fsamp) |
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{ |
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int i; |
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Freq *F; |
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_freq [0].f = 4096; |
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_freq [1].f = 512; |
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_freq [2].f = 1088; |
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_freq [3].f = 1544; |
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_freq [4].f = 2049; |
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_freq [0].a = 0.2f; |
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_freq [1].a = 0.1f; |
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_freq [2].a = 0.1f; |
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_freq [3].a = 0.1f; |
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_freq [4].a = 0.1f; |
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for (i = 0, F = _freq; i < 5; i++, F++) |
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{ |
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struct Freq *F; |
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struct MTDM *retval = (MTDM *)malloc( sizeof(struct MTDM) ); |
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if (retval==NULL) |
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return NULL; |
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retval->_cnt = 0; |
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retval->_inv = 0; |
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retval->_freq [0].f = 4096; |
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retval->_freq [1].f = 2048; |
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retval->_freq [2].f = 3072; |
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retval->_freq [3].f = 2560; |
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retval->_freq [4].f = 2304; |
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retval->_freq [5].f = 2176; |
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retval->_freq [6].f = 1088; |
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retval->_freq [7].f = 1312; |
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retval->_freq [8].f = 1552; |
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retval->_freq [9].f = 1800; |
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retval->_freq [10].f = 3332; |
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retval->_freq [11].f = 3586; |
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retval->_freq [12].f = 3841; |
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retval->_wlp = 200.0f / fsamp; |
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for (i = 0, F = retval->_freq; i < 13; i++, F++) { |
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F->p = 128; |
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F->xa = F->ya = 0.0f; |
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F->xf = F->yf = 0.0f; |
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F->x1 = F->y1 = 0.0f; |
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F->x2 = F->y2 = 0.0f; |
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} |
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return retval; |
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} |
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int MTDM::process (size_t len, float *ip, float *op) |
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int mtdm_process (struct MTDM *self, size_t len, float *ip, float *op) |
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{ |
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int i; |
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float vip, vop, a, c, s; |
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Freq *F; |
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struct Freq *F; |
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while (len--) |
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{ |
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vop = 0.0f; |
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vip = *ip++; |
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for (i = 0, F = _freq; i < 5; i++, F++) |
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for (i = 0, F = self->_freq; i < 13; i++, F++) |
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{ |
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a = 2 * (float) M_PI * (F->p & 65535) / 65536.0; |
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a = 2 * (float) M_PI * (F->p & 65535) / 65536.0; |
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F->p += F->f; |
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c = cosf (a); |
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s = -sinf (a); |
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vop += F->a * s; |
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c = cosf (a); |
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s = -sinf (a); |
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vop += (i ? 0.01f : 0.20f) * s; |
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F->xa += s * vip; |
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F->ya += c * vip; |
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} |
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} |
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*op++ = vop; |
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if (++_cnt == 16) |
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if (++self->_cnt == 16) |
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{ |
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for (i = 0, F = _freq; i < 5; i++, F++) |
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for (i = 0, F = self->_freq; i < 13; i++, F++) |
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{ |
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F->xf += 1e-3f * (F->xa - F->xf + 1e-20); |
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F->yf += 1e-3f * (F->ya - F->yf + 1e-20); |
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F->x1 += self->_wlp * (F->xa - F->x1 + 1e-20); |
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F->y1 += self->_wlp * (F->ya - F->y1 + 1e-20); |
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F->x2 += self->_wlp * (F->x1 - F->x2 + 1e-20); |
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F->y2 += self->_wlp * (F->y1 - F->y2 + 1e-20); |
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F->xa = F->ya = 0.0f; |
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} |
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_cnt = 0; |
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self->_cnt = 0; |
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} |
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} |
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return 0; |
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} |
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int MTDM::resolve (void) |
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int mtdm_resolve (struct MTDM *self) |
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{ |
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int i, k, m; |
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double d, e, f0, p; |
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Freq *F = _freq; |
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struct Freq *F = self->_freq; |
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if (hypot (F->xf, F->yf) < 0.01) return -1; |
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d = atan2 (F->yf, F->xf) / (2 * M_PI); |
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if (_inv) d += 0.5f; |
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if (d > 0.5f) d -= 1.0f; |
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f0 = _freq [0].f; |
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if (hypot (F->x2, F->y2) < 0.001) return -1; |
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d = atan2 (F->y2, F->x2) / (2 * M_PI); |
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if (self->_inv) d += 0.5; |
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if (d > 0.5) d -= 1.0; |
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f0 = self->_freq [0].f; |
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m = 1; |
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_err = 0.0; |
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for (i = 0; i < 4; i++) |
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self->_err = 0.0; |
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for (i = 0; i < 12; i++) |
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{ |
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F++; |
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p = atan2 (F->yf, F->xf) / (2 * M_PI) - d * F->f / f0; |
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if (_inv) p += 0.5f; |
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p = atan2 (F->y2, F->x2) / (2 * M_PI) - d * F->f / f0; |
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if (self->_inv) p += 0.5; |
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p -= floor (p); |
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p *= 8; |
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p *= 2; |
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k = (int)(floor (p + 0.5)); |
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e = fabs (p - k); |
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if (e > _err) _err = e; |
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if (e > 0.4) return 1; |
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d += m * (k & 7); |
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m *= 8; |
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} |
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_del = 16 * d; |
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if (e > self->_err) self->_err = e; |
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if (e > 0.4) return 1; |
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d += m * (k & 1); |
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m *= 2; |
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} |
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self->_del = 16 * d; |
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return 0; |
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} |
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void mtdm_invert (struct MTDM *self) |
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{ |
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self->_inv ^= 1; |
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} |
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// -------------------------------------------------------------------------------- |
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static MTDM mtdm; |
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static struct MTDM *mtdm; |
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static jack_client_t *jack_handle; |
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static jack_port_t *jack_capt; |
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static jack_port_t *jack_play; |
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@@ -191,7 +201,7 @@ int jack_callback (jack_nframes_t nframes, void *arg) |
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ip = (float *)(jack_port_get_buffer (jack_capt, nframes)); |
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op = (float *)(jack_port_get_buffer (jack_play, nframes)); |
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mtdm.process (nframes, ip, op); |
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mtdm_process (mtdm, nframes, ip, op); |
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return 0; |
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} |
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@@ -207,6 +217,8 @@ int main (int ac, char *av []) |
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exit (1); |
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} |
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mtdm = mtdm_new(jack_get_sample_rate(jack_handle)); |
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jack_set_process_callback (jack_handle, jack_callback, 0); |
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if (jack_set_latency_callback) |
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@@ -225,28 +237,28 @@ int main (int ac, char *av []) |
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while (1) |
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{ |
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#ifdef WIN32 |
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Sleep (250); |
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#else |
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usleep (250000); |
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#endif |
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if (mtdm.resolve() < 0) printf ("Signal below threshold...\n"); |
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else |
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#ifdef WIN32 |
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Sleep (250); |
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#else |
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usleep (250000); |
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#endif |
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if (mtdm_resolve (mtdm) < 0) printf ("Signal below threshold...\n"); |
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else |
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{ |
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jack_nframes_t systemic_latency; |
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if (mtdm.err () > 0.3) |
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if (mtdm->_err > 0.3) |
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{ |
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mtdm.invert (); |
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mtdm.resolve (); |
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mtdm_invert ( mtdm ); |
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mtdm_resolve ( mtdm ); |
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} |
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systemic_latency = (jack_nframes_t) floor (mtdm._del - (capture_latency.max + playback_latency.max)); |
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systemic_latency = (jack_nframes_t) floor (mtdm->_del - (capture_latency.max + playback_latency.max)); |
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printf("%10.3lf frames %10.3lf ms total roundtrip latency\n\textra loopback latency: %u frames\n\tuse %u for the backend arguments -I and -O" |
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, mtdm._del, mtdm._del * t, |
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printf ("%10.3lf frames %10.3lf ms total roundtrip latency\n\textra loopback latency: %u frames\n\tuse %u for the backend arguments -I and -O", mtdm->_del, mtdm->_del * t, |
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systemic_latency, systemic_latency/2); |
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if (mtdm._err > 0.2) printf (" ??"); |
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if (mtdm._inv) printf (" Inv"); |
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if (mtdm->_err > 0.2) printf (" ??"); |
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if (mtdm->_inv) printf (" Inv"); |
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printf ("\n"); |
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} |
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} |
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@@ -254,4 +266,4 @@ int main (int ac, char *av []) |
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return 0; |
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} |
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// -------------------------------------------------------------------------------- |
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// -------------------------------------------------------------------------------- |