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dtmf: reindent
This commit is contained in:
David Schleef
parent
0073550300
commit
5fed7a264c
1 changed files with 366 additions and 383 deletions
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@ -60,12 +60,12 @@
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#define DTMF_THRESHOLD 8.0e7
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#define FAX_THRESHOLD 8.0e7
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#define FAX_2ND_HARMONIC 2.0 /* 4dB */
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#define DTMF_NORMAL_TWIST 6.3 /* 8dB */
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#define DTMF_NORMAL_TWIST 6.3 /* 8dB */
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#define DTMF_REVERSE_TWIST ((isradio) ? 4.0 : 2.5) /* 4dB normal */
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#define DTMF_RELATIVE_PEAK_ROW 6.3 /* 8dB */
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#define DTMF_RELATIVE_PEAK_COL 6.3 /* 8dB */
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#define DTMF_RELATIVE_PEAK_ROW 6.3 /* 8dB */
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#define DTMF_RELATIVE_PEAK_COL 6.3 /* 8dB */
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#define DTMF_2ND_HARMONIC_ROW ((isradio) ? 1.7 : 2.5) /* 4dB normal */
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#define DTMF_2ND_HARMONIC_COL 63.1 /* 18dB */
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#define DTMF_2ND_HARMONIC_COL 63.1 /* 18dB */
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static tone_detection_descriptor_t dtmf_detect_row[4];
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static tone_detection_descriptor_t dtmf_detect_col[4];
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@ -74,443 +74,426 @@ static tone_detection_descriptor_t dtmf_detect_col_2nd[4];
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static tone_detection_descriptor_t fax_detect;
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static tone_detection_descriptor_t fax_detect_2nd;
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static float dtmf_row[] =
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{
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697.0, 770.0, 852.0, 941.0
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static float dtmf_row[] = {
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697.0, 770.0, 852.0, 941.0
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};
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static float dtmf_col[] =
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{
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1209.0, 1336.0, 1477.0, 1633.0
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static float dtmf_col[] = {
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1209.0, 1336.0, 1477.0, 1633.0
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};
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static float fax_freq = 1100.0;
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static char dtmf_positions[] = "123A" "456B" "789C" "*0#D";
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static void goertzel_init(goertzel_state_t *s,
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tone_detection_descriptor_t *t)
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static void
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goertzel_init (goertzel_state_t * s, tone_detection_descriptor_t * t)
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{
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s->v2 =
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s->v3 = 0.0;
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s->fac = t->fac;
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s->v2 = s->v3 = 0.0;
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s->fac = t->fac;
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}
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/*- End of function --------------------------------------------------------*/
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#if defined(USE_3DNOW)
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static inline void _dtmf_goertzel_update(goertzel_state_t *s,
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float x[],
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int samples)
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static inline void
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_dtmf_goertzel_update (goertzel_state_t * s, float x[], int samples)
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{
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int n;
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float v;
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int i;
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float vv[16];
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int n;
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float v;
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int i;
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float vv[16];
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vv[4] = s[0].v2;
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vv[5] = s[1].v2;
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vv[6] = s[2].v2;
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vv[7] = s[3].v2;
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vv[8] = s[0].v3;
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vv[9] = s[1].v3;
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vv[10] = s[2].v3;
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vv[11] = s[3].v3;
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vv[12] = s[0].fac;
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vv[13] = s[1].fac;
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vv[14] = s[2].fac;
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vv[15] = s[3].fac;
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vv[4] = s[0].v2;
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vv[5] = s[1].v2;
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vv[6] = s[2].v2;
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vv[7] = s[3].v2;
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vv[8] = s[0].v3;
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vv[9] = s[1].v3;
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vv[10] = s[2].v3;
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vv[11] = s[3].v3;
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vv[12] = s[0].fac;
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vv[13] = s[1].fac;
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vv[14] = s[2].fac;
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vv[15] = s[3].fac;
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//v1 = s->v2;
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//s->v2 = s->v3;
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//s->v3 = s->fac*s->v2 - v1 + x[0];
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//v1 = s->v2;
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//s->v2 = s->v3;
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//s->v3 = s->fac*s->v2 - v1 + x[0];
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__asm__ __volatile__ (
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" femms;\n"
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__asm__ __volatile__ (" femms;\n"
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" movq 16(%%edx),%%mm2;\n"
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" movq 24(%%edx),%%mm3;\n"
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" movq 32(%%edx),%%mm4;\n"
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" movq 40(%%edx),%%mm5;\n"
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" movq 48(%%edx),%%mm6;\n"
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" movq 56(%%edx),%%mm7;\n"
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" jmp 1f;\n"
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" .align 32;\n"
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" 1: ;\n"
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" prefetch (%%eax);\n"
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" movq %%mm3,%%mm1;\n"
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" movq %%mm2,%%mm0;\n"
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" movq %%mm5,%%mm3;\n"
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" movq %%mm4,%%mm2;\n"
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" pfmul %%mm7,%%mm5;\n"
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" pfmul %%mm6,%%mm4;\n"
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" pfsub %%mm1,%%mm5;\n"
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" pfsub %%mm0,%%mm4;\n"
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" movq (%%eax),%%mm0;\n"
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" movq %%mm0,%%mm1;\n"
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" punpckldq %%mm0,%%mm1;\n"
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" add $4,%%eax;\n"
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" pfadd %%mm1,%%mm5;\n"
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" pfadd %%mm1,%%mm4;\n"
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" dec %%ecx;\n"
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" jnz 1b;\n"
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" movq %%mm2,16(%%edx);\n"
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" movq %%mm3,24(%%edx);\n"
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" movq %%mm4,32(%%edx);\n"
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" movq %%mm5,40(%%edx);\n"
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" femms;\n"::"c" (samples), "a" (x), "d" (vv)
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:"memory", "eax", "ecx");
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" movq 16(%%edx),%%mm2;\n"
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" movq 24(%%edx),%%mm3;\n"
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" movq 32(%%edx),%%mm4;\n"
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" movq 40(%%edx),%%mm5;\n"
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" movq 48(%%edx),%%mm6;\n"
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" movq 56(%%edx),%%mm7;\n"
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" jmp 1f;\n"
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" .align 32;\n"
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" 1: ;\n"
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" prefetch (%%eax);\n"
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" movq %%mm3,%%mm1;\n"
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" movq %%mm2,%%mm0;\n"
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" movq %%mm5,%%mm3;\n"
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" movq %%mm4,%%mm2;\n"
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" pfmul %%mm7,%%mm5;\n"
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" pfmul %%mm6,%%mm4;\n"
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" pfsub %%mm1,%%mm5;\n"
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" pfsub %%mm0,%%mm4;\n"
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" movq (%%eax),%%mm0;\n"
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" movq %%mm0,%%mm1;\n"
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" punpckldq %%mm0,%%mm1;\n"
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" add $4,%%eax;\n"
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" pfadd %%mm1,%%mm5;\n"
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" pfadd %%mm1,%%mm4;\n"
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" dec %%ecx;\n"
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" jnz 1b;\n"
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" movq %%mm2,16(%%edx);\n"
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" movq %%mm3,24(%%edx);\n"
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" movq %%mm4,32(%%edx);\n"
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" movq %%mm5,40(%%edx);\n"
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" femms;\n"
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:
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: "c" (samples), "a" (x), "d" (vv)
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: "memory", "eax", "ecx");
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s[0].v2 = vv[4];
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s[1].v2 = vv[5];
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s[2].v2 = vv[6];
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s[3].v2 = vv[7];
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s[0].v3 = vv[8];
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s[1].v3 = vv[9];
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s[2].v3 = vv[10];
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s[3].v3 = vv[11];
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s[0].v2 = vv[4];
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s[1].v2 = vv[5];
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s[2].v2 = vv[6];
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s[3].v2 = vv[7];
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s[0].v3 = vv[8];
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s[1].v3 = vv[9];
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s[2].v3 = vv[10];
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s[3].v3 = vv[11];
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}
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#endif
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/*- End of function --------------------------------------------------------*/
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void zap_goertzel_update(goertzel_state_t *s,
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int16_t x[],
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int samples)
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void
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zap_goertzel_update (goertzel_state_t * s, int16_t x[], int samples)
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{
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int i;
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float v1;
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for (i = 0; i < samples; i++)
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{
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v1 = s->v2;
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s->v2 = s->v3;
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s->v3 = s->fac*s->v2 - v1 + x[i];
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}
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int i;
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float v1;
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for (i = 0; i < samples; i++) {
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v1 = s->v2;
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s->v2 = s->v3;
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s->v3 = s->fac * s->v2 - v1 + x[i];
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}
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}
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/*- End of function --------------------------------------------------------*/
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float zap_goertzel_result (goertzel_state_t *s)
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float
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zap_goertzel_result (goertzel_state_t * s)
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{
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return s->v3*s->v3 + s->v2*s->v2 - s->v2*s->v3*s->fac;
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return s->v3 * s->v3 + s->v2 * s->v2 - s->v2 * s->v3 * s->fac;
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}
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/*- End of function --------------------------------------------------------*/
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void zap_dtmf_detect_init (dtmf_detect_state_t *s)
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void
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zap_dtmf_detect_init (dtmf_detect_state_t * s)
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{
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int i;
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float theta;
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int i;
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float theta;
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s->hit1 =
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s->hit2 = 0;
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s->hit1 = s->hit2 = 0;
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for (i = 0; i < 4; i++)
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{
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theta = 2.0*M_PI*(dtmf_row[i]/SAMPLE_RATE);
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dtmf_detect_row[i].fac = 2.0*cos(theta);
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for (i = 0; i < 4; i++) {
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theta = 2.0 * M_PI * (dtmf_row[i] / SAMPLE_RATE);
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dtmf_detect_row[i].fac = 2.0 * cos (theta);
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theta = 2.0*M_PI*(dtmf_col[i]/SAMPLE_RATE);
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dtmf_detect_col[i].fac = 2.0*cos(theta);
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theta = 2.0*M_PI*(dtmf_row[i]*2.0/SAMPLE_RATE);
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dtmf_detect_row_2nd[i].fac = 2.0*cos(theta);
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theta = 2.0 * M_PI * (dtmf_col[i] / SAMPLE_RATE);
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dtmf_detect_col[i].fac = 2.0 * cos (theta);
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theta = 2.0*M_PI*(dtmf_col[i]*2.0/SAMPLE_RATE);
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dtmf_detect_col_2nd[i].fac = 2.0*cos(theta);
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goertzel_init (&s->row_out[i], &dtmf_detect_row[i]);
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goertzel_init (&s->col_out[i], &dtmf_detect_col[i]);
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goertzel_init (&s->row_out2nd[i], &dtmf_detect_row_2nd[i]);
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goertzel_init (&s->col_out2nd[i], &dtmf_detect_col_2nd[i]);
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s->energy = 0.0;
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}
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theta = 2.0 * M_PI * (dtmf_row[i] * 2.0 / SAMPLE_RATE);
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dtmf_detect_row_2nd[i].fac = 2.0 * cos (theta);
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/* Same for the fax dector */
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theta = 2.0*M_PI*(fax_freq/SAMPLE_RATE);
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fax_detect.fac = 2.0 * cos(theta);
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goertzel_init (&s->fax_tone, &fax_detect);
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theta = 2.0 * M_PI * (dtmf_col[i] * 2.0 / SAMPLE_RATE);
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dtmf_detect_col_2nd[i].fac = 2.0 * cos (theta);
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/* Same for the fax dector 2nd harmonic */
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theta = 2.0*M_PI*(fax_freq * 2.0/SAMPLE_RATE);
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fax_detect_2nd.fac = 2.0 * cos(theta);
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goertzel_init (&s->fax_tone2nd, &fax_detect_2nd);
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s->current_sample = 0;
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s->detected_digits = 0;
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s->lost_digits = 0;
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s->digits[0] = '\0';
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s->mhit = 0;
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goertzel_init (&s->row_out[i], &dtmf_detect_row[i]);
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goertzel_init (&s->col_out[i], &dtmf_detect_col[i]);
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goertzel_init (&s->row_out2nd[i], &dtmf_detect_row_2nd[i]);
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goertzel_init (&s->col_out2nd[i], &dtmf_detect_col_2nd[i]);
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s->energy = 0.0;
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}
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/* Same for the fax dector */
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theta = 2.0 * M_PI * (fax_freq / SAMPLE_RATE);
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fax_detect.fac = 2.0 * cos (theta);
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goertzel_init (&s->fax_tone, &fax_detect);
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/* Same for the fax dector 2nd harmonic */
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theta = 2.0 * M_PI * (fax_freq * 2.0 / SAMPLE_RATE);
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fax_detect_2nd.fac = 2.0 * cos (theta);
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goertzel_init (&s->fax_tone2nd, &fax_detect_2nd);
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s->current_sample = 0;
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s->detected_digits = 0;
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s->lost_digits = 0;
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s->digits[0] = '\0';
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s->mhit = 0;
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}
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/*- End of function --------------------------------------------------------*/
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int zap_dtmf_detect (dtmf_detect_state_t *s,
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int16_t amp[],
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int samples,
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int isradio)
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int
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zap_dtmf_detect (dtmf_detect_state_t * s,
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int16_t amp[], int samples, int isradio)
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{
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float row_energy[4];
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float col_energy[4];
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float fax_energy;
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float fax_energy_2nd;
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float famp;
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float v1;
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int i;
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int j;
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int sample;
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int best_row;
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int best_col;
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int hit;
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int limit;
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float row_energy[4];
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float col_energy[4];
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float fax_energy;
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float fax_energy_2nd;
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float famp;
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float v1;
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int i;
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int j;
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int sample;
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int best_row;
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int best_col;
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int hit;
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int limit;
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hit = 0;
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for (sample = 0; sample < samples; sample = limit)
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{
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/* 102 is optimised to meet the DTMF specs. */
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if ((samples - sample) >= (102 - s->current_sample))
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limit = sample + (102 - s->current_sample);
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else
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limit = samples;
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hit = 0;
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for (sample = 0; sample < samples; sample = limit) {
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/* 102 is optimised to meet the DTMF specs. */
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if ((samples - sample) >= (102 - s->current_sample))
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limit = sample + (102 - s->current_sample);
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else
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limit = samples;
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#if defined(USE_3DNOW)
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_dtmf_goertzel_update (s->row_out, amp + sample, limit - sample);
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_dtmf_goertzel_update (s->col_out, amp + sample, limit - sample);
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_dtmf_goertzel_update (s->row_out2nd, amp + sample, limit2 - sample);
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_dtmf_goertzel_update (s->col_out2nd, amp + sample, limit2 - sample);
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/* XXX Need to fax detect for 3dnow too XXX */
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#warning "Fax Support Broken"
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_dtmf_goertzel_update (s->row_out, amp + sample, limit - sample);
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_dtmf_goertzel_update (s->col_out, amp + sample, limit - sample);
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_dtmf_goertzel_update (s->row_out2nd, amp + sample, limit2 - sample);
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_dtmf_goertzel_update (s->col_out2nd, amp + sample, limit2 - sample);
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/* XXX Need to fax detect for 3dnow too XXX */
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#warning "Fax Support Broken"
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#else
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/* The following unrolled loop takes only 35% (rough estimate) of the
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time of a rolled loop on the machine on which it was developed */
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for (j = sample; j < limit; j++)
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{
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famp = amp[j];
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s->energy += famp*famp;
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/* With GCC 2.95, the following unrolled code seems to take about 35%
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(rough estimate) as long as a neat little 0-3 loop */
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v1 = s->row_out[0].v2;
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s->row_out[0].v2 = s->row_out[0].v3;
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s->row_out[0].v3 = s->row_out[0].fac*s->row_out[0].v2 - v1 + famp;
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v1 = s->col_out[0].v2;
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s->col_out[0].v2 = s->col_out[0].v3;
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s->col_out[0].v3 = s->col_out[0].fac*s->col_out[0].v2 - v1 + famp;
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v1 = s->row_out[1].v2;
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s->row_out[1].v2 = s->row_out[1].v3;
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s->row_out[1].v3 = s->row_out[1].fac*s->row_out[1].v2 - v1 + famp;
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v1 = s->col_out[1].v2;
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s->col_out[1].v2 = s->col_out[1].v3;
|
||||
s->col_out[1].v3 = s->col_out[1].fac*s->col_out[1].v2 - v1 + famp;
|
||||
|
||||
v1 = s->row_out[2].v2;
|
||||
s->row_out[2].v2 = s->row_out[2].v3;
|
||||
s->row_out[2].v3 = s->row_out[2].fac*s->row_out[2].v2 - v1 + famp;
|
||||
|
||||
v1 = s->col_out[2].v2;
|
||||
s->col_out[2].v2 = s->col_out[2].v3;
|
||||
s->col_out[2].v3 = s->col_out[2].fac*s->col_out[2].v2 - v1 + famp;
|
||||
|
||||
v1 = s->row_out[3].v2;
|
||||
s->row_out[3].v2 = s->row_out[3].v3;
|
||||
s->row_out[3].v3 = s->row_out[3].fac*s->row_out[3].v2 - v1 + famp;
|
||||
/* The following unrolled loop takes only 35% (rough estimate) of the
|
||||
time of a rolled loop on the machine on which it was developed */
|
||||
for (j = sample; j < limit; j++) {
|
||||
famp = amp[j];
|
||||
|
||||
v1 = s->col_out[3].v2;
|
||||
s->col_out[3].v2 = s->col_out[3].v3;
|
||||
s->col_out[3].v3 = s->col_out[3].fac*s->col_out[3].v2 - v1 + famp;
|
||||
s->energy += famp * famp;
|
||||
|
||||
v1 = s->col_out2nd[0].v2;
|
||||
s->col_out2nd[0].v2 = s->col_out2nd[0].v3;
|
||||
s->col_out2nd[0].v3 = s->col_out2nd[0].fac*s->col_out2nd[0].v2 - v1 + famp;
|
||||
|
||||
v1 = s->row_out2nd[0].v2;
|
||||
s->row_out2nd[0].v2 = s->row_out2nd[0].v3;
|
||||
s->row_out2nd[0].v3 = s->row_out2nd[0].fac*s->row_out2nd[0].v2 - v1 + famp;
|
||||
|
||||
v1 = s->col_out2nd[1].v2;
|
||||
s->col_out2nd[1].v2 = s->col_out2nd[1].v3;
|
||||
s->col_out2nd[1].v3 = s->col_out2nd[1].fac*s->col_out2nd[1].v2 - v1 + famp;
|
||||
|
||||
v1 = s->row_out2nd[1].v2;
|
||||
s->row_out2nd[1].v2 = s->row_out2nd[1].v3;
|
||||
s->row_out2nd[1].v3 = s->row_out2nd[1].fac*s->row_out2nd[1].v2 - v1 + famp;
|
||||
|
||||
v1 = s->col_out2nd[2].v2;
|
||||
s->col_out2nd[2].v2 = s->col_out2nd[2].v3;
|
||||
s->col_out2nd[2].v3 = s->col_out2nd[2].fac*s->col_out2nd[2].v2 - v1 + famp;
|
||||
|
||||
v1 = s->row_out2nd[2].v2;
|
||||
s->row_out2nd[2].v2 = s->row_out2nd[2].v3;
|
||||
s->row_out2nd[2].v3 = s->row_out2nd[2].fac*s->row_out2nd[2].v2 - v1 + famp;
|
||||
|
||||
v1 = s->col_out2nd[3].v2;
|
||||
s->col_out2nd[3].v2 = s->col_out2nd[3].v3;
|
||||
s->col_out2nd[3].v3 = s->col_out2nd[3].fac*s->col_out2nd[3].v2 - v1 + famp;
|
||||
|
||||
v1 = s->row_out2nd[3].v2;
|
||||
s->row_out2nd[3].v2 = s->row_out2nd[3].v3;
|
||||
s->row_out2nd[3].v3 = s->row_out2nd[3].fac*s->row_out2nd[3].v2 - v1 + famp;
|
||||
/* With GCC 2.95, the following unrolled code seems to take about 35%
|
||||
(rough estimate) as long as a neat little 0-3 loop */
|
||||
v1 = s->row_out[0].v2;
|
||||
s->row_out[0].v2 = s->row_out[0].v3;
|
||||
s->row_out[0].v3 = s->row_out[0].fac * s->row_out[0].v2 - v1 + famp;
|
||||
|
||||
/* Update fax tone */
|
||||
v1 = s->fax_tone.v2;
|
||||
s->fax_tone.v2 = s->fax_tone.v3;
|
||||
s->fax_tone.v3 = s->fax_tone.fac*s->fax_tone.v2 - v1 + famp;
|
||||
v1 = s->col_out[0].v2;
|
||||
s->col_out[0].v2 = s->col_out[0].v3;
|
||||
s->col_out[0].v3 = s->col_out[0].fac * s->col_out[0].v2 - v1 + famp;
|
||||
|
||||
v1 = s->fax_tone.v2;
|
||||
s->fax_tone2nd.v2 = s->fax_tone2nd.v3;
|
||||
s->fax_tone2nd.v3 = s->fax_tone2nd.fac*s->fax_tone2nd.v2 - v1 + famp;
|
||||
}
|
||||
v1 = s->row_out[1].v2;
|
||||
s->row_out[1].v2 = s->row_out[1].v3;
|
||||
s->row_out[1].v3 = s->row_out[1].fac * s->row_out[1].v2 - v1 + famp;
|
||||
|
||||
v1 = s->col_out[1].v2;
|
||||
s->col_out[1].v2 = s->col_out[1].v3;
|
||||
s->col_out[1].v3 = s->col_out[1].fac * s->col_out[1].v2 - v1 + famp;
|
||||
|
||||
v1 = s->row_out[2].v2;
|
||||
s->row_out[2].v2 = s->row_out[2].v3;
|
||||
s->row_out[2].v3 = s->row_out[2].fac * s->row_out[2].v2 - v1 + famp;
|
||||
|
||||
v1 = s->col_out[2].v2;
|
||||
s->col_out[2].v2 = s->col_out[2].v3;
|
||||
s->col_out[2].v3 = s->col_out[2].fac * s->col_out[2].v2 - v1 + famp;
|
||||
|
||||
v1 = s->row_out[3].v2;
|
||||
s->row_out[3].v2 = s->row_out[3].v3;
|
||||
s->row_out[3].v3 = s->row_out[3].fac * s->row_out[3].v2 - v1 + famp;
|
||||
|
||||
v1 = s->col_out[3].v2;
|
||||
s->col_out[3].v2 = s->col_out[3].v3;
|
||||
s->col_out[3].v3 = s->col_out[3].fac * s->col_out[3].v2 - v1 + famp;
|
||||
|
||||
v1 = s->col_out2nd[0].v2;
|
||||
s->col_out2nd[0].v2 = s->col_out2nd[0].v3;
|
||||
s->col_out2nd[0].v3 =
|
||||
s->col_out2nd[0].fac * s->col_out2nd[0].v2 - v1 + famp;
|
||||
|
||||
v1 = s->row_out2nd[0].v2;
|
||||
s->row_out2nd[0].v2 = s->row_out2nd[0].v3;
|
||||
s->row_out2nd[0].v3 =
|
||||
s->row_out2nd[0].fac * s->row_out2nd[0].v2 - v1 + famp;
|
||||
|
||||
v1 = s->col_out2nd[1].v2;
|
||||
s->col_out2nd[1].v2 = s->col_out2nd[1].v3;
|
||||
s->col_out2nd[1].v3 =
|
||||
s->col_out2nd[1].fac * s->col_out2nd[1].v2 - v1 + famp;
|
||||
|
||||
v1 = s->row_out2nd[1].v2;
|
||||
s->row_out2nd[1].v2 = s->row_out2nd[1].v3;
|
||||
s->row_out2nd[1].v3 =
|
||||
s->row_out2nd[1].fac * s->row_out2nd[1].v2 - v1 + famp;
|
||||
|
||||
v1 = s->col_out2nd[2].v2;
|
||||
s->col_out2nd[2].v2 = s->col_out2nd[2].v3;
|
||||
s->col_out2nd[2].v3 =
|
||||
s->col_out2nd[2].fac * s->col_out2nd[2].v2 - v1 + famp;
|
||||
|
||||
v1 = s->row_out2nd[2].v2;
|
||||
s->row_out2nd[2].v2 = s->row_out2nd[2].v3;
|
||||
s->row_out2nd[2].v3 =
|
||||
s->row_out2nd[2].fac * s->row_out2nd[2].v2 - v1 + famp;
|
||||
|
||||
v1 = s->col_out2nd[3].v2;
|
||||
s->col_out2nd[3].v2 = s->col_out2nd[3].v3;
|
||||
s->col_out2nd[3].v3 =
|
||||
s->col_out2nd[3].fac * s->col_out2nd[3].v2 - v1 + famp;
|
||||
|
||||
v1 = s->row_out2nd[3].v2;
|
||||
s->row_out2nd[3].v2 = s->row_out2nd[3].v3;
|
||||
s->row_out2nd[3].v3 =
|
||||
s->row_out2nd[3].fac * s->row_out2nd[3].v2 - v1 + famp;
|
||||
|
||||
/* Update fax tone */
|
||||
v1 = s->fax_tone.v2;
|
||||
s->fax_tone.v2 = s->fax_tone.v3;
|
||||
s->fax_tone.v3 = s->fax_tone.fac * s->fax_tone.v2 - v1 + famp;
|
||||
|
||||
v1 = s->fax_tone.v2;
|
||||
s->fax_tone2nd.v2 = s->fax_tone2nd.v3;
|
||||
s->fax_tone2nd.v3 = s->fax_tone2nd.fac * s->fax_tone2nd.v2 - v1 + famp;
|
||||
}
|
||||
#endif
|
||||
s->current_sample += (limit - sample);
|
||||
if (s->current_sample < 102)
|
||||
continue;
|
||||
s->current_sample += (limit - sample);
|
||||
if (s->current_sample < 102)
|
||||
continue;
|
||||
|
||||
/* Detect the fax energy, too */
|
||||
fax_energy = zap_goertzel_result(&s->fax_tone);
|
||||
|
||||
/* We are at the end of a DTMF detection block */
|
||||
/* Find the peak row and the peak column */
|
||||
row_energy[0] = zap_goertzel_result (&s->row_out[0]);
|
||||
col_energy[0] = zap_goertzel_result (&s->col_out[0]);
|
||||
/* Detect the fax energy, too */
|
||||
fax_energy = zap_goertzel_result (&s->fax_tone);
|
||||
|
||||
for (best_row = best_col = 0, i = 1; i < 4; i++)
|
||||
{
|
||||
row_energy[i] = zap_goertzel_result (&s->row_out[i]);
|
||||
if (row_energy[i] > row_energy[best_row])
|
||||
best_row = i;
|
||||
col_energy[i] = zap_goertzel_result (&s->col_out[i]);
|
||||
if (col_energy[i] > col_energy[best_col])
|
||||
best_col = i;
|
||||
}
|
||||
hit = 0;
|
||||
/* Basic signal level test and the twist test */
|
||||
if (row_energy[best_row] >= DTMF_THRESHOLD
|
||||
&&
|
||||
col_energy[best_col] >= DTMF_THRESHOLD
|
||||
&&
|
||||
col_energy[best_col] < row_energy[best_row]*DTMF_REVERSE_TWIST
|
||||
&&
|
||||
col_energy[best_col]*DTMF_NORMAL_TWIST > row_energy[best_row])
|
||||
{
|
||||
/* Relative peak test */
|
||||
for (i = 0; i < 4; i++)
|
||||
{
|
||||
if ((i != best_col && col_energy[i]*DTMF_RELATIVE_PEAK_COL > col_energy[best_col])
|
||||
||
|
||||
(i != best_row && row_energy[i]*DTMF_RELATIVE_PEAK_ROW > row_energy[best_row]))
|
||||
{
|
||||
break;
|
||||
}
|
||||
}
|
||||
/* ... and second harmonic test */
|
||||
if (i >= 4
|
||||
&&
|
||||
(row_energy[best_row] + col_energy[best_col]) > 42.0*s->energy
|
||||
&&
|
||||
zap_goertzel_result (&s->col_out2nd[best_col])*DTMF_2ND_HARMONIC_COL < col_energy[best_col]
|
||||
&&
|
||||
zap_goertzel_result (&s->row_out2nd[best_row])*DTMF_2ND_HARMONIC_ROW < row_energy[best_row])
|
||||
{
|
||||
hit = dtmf_positions[(best_row << 2) + best_col];
|
||||
/* Look for two successive similar results */
|
||||
/* The logic in the next test is:
|
||||
We need two successive identical clean detects, with
|
||||
something different preceeding it. This can work with
|
||||
back to back differing digits. More importantly, it
|
||||
can work with nasty phones that give a very wobbly start
|
||||
to a digit. */
|
||||
if (hit == s->hit3 && s->hit3 != s->hit2)
|
||||
{
|
||||
s->mhit = hit;
|
||||
s->digit_hits[(best_row << 2) + best_col]++;
|
||||
s->detected_digits++;
|
||||
if (s->current_digits < MAX_DTMF_DIGITS)
|
||||
{
|
||||
s->digits[s->current_digits++] = hit;
|
||||
s->digits[s->current_digits] = '\0';
|
||||
}
|
||||
else
|
||||
{
|
||||
s->lost_digits++;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
if (!hit && (fax_energy >= FAX_THRESHOLD) && (fax_energy > s->energy * 21.0)) {
|
||||
fax_energy_2nd = zap_goertzel_result(&s->fax_tone2nd);
|
||||
if (fax_energy_2nd * FAX_2ND_HARMONIC < fax_energy) {
|
||||
#if 0
|
||||
printf("Fax energy/Second Harmonic: %f/%f\n", fax_energy, fax_energy_2nd);
|
||||
#endif
|
||||
/* XXX Probably need better checking than just this the energy XXX */
|
||||
hit = 'f';
|
||||
s->fax_hits++;
|
||||
} /* Don't reset fax hits counter */
|
||||
} else {
|
||||
if (s->fax_hits > 5) {
|
||||
s->mhit = 'f';
|
||||
s->detected_digits++;
|
||||
if (s->current_digits < MAX_DTMF_DIGITS)
|
||||
{
|
||||
s->digits[s->current_digits++] = hit;
|
||||
s->digits[s->current_digits] = '\0';
|
||||
}
|
||||
else
|
||||
{
|
||||
s->lost_digits++;
|
||||
}
|
||||
}
|
||||
s->fax_hits = 0;
|
||||
}
|
||||
s->hit1 = s->hit2;
|
||||
s->hit2 = s->hit3;
|
||||
s->hit3 = hit;
|
||||
/* Reinitialise the detector for the next block */
|
||||
for (i = 0; i < 4; i++)
|
||||
{
|
||||
goertzel_init (&s->row_out[i], &dtmf_detect_row[i]);
|
||||
goertzel_init (&s->col_out[i], &dtmf_detect_col[i]);
|
||||
goertzel_init (&s->row_out2nd[i], &dtmf_detect_row_2nd[i]);
|
||||
goertzel_init (&s->col_out2nd[i], &dtmf_detect_col_2nd[i]);
|
||||
/* We are at the end of a DTMF detection block */
|
||||
/* Find the peak row and the peak column */
|
||||
row_energy[0] = zap_goertzel_result (&s->row_out[0]);
|
||||
col_energy[0] = zap_goertzel_result (&s->col_out[0]);
|
||||
|
||||
for (best_row = best_col = 0, i = 1; i < 4; i++) {
|
||||
row_energy[i] = zap_goertzel_result (&s->row_out[i]);
|
||||
if (row_energy[i] > row_energy[best_row])
|
||||
best_row = i;
|
||||
col_energy[i] = zap_goertzel_result (&s->col_out[i]);
|
||||
if (col_energy[i] > col_energy[best_col])
|
||||
best_col = i;
|
||||
}
|
||||
hit = 0;
|
||||
/* Basic signal level test and the twist test */
|
||||
if (row_energy[best_row] >= DTMF_THRESHOLD
|
||||
&&
|
||||
col_energy[best_col] >= DTMF_THRESHOLD
|
||||
&&
|
||||
col_energy[best_col] < row_energy[best_row] * DTMF_REVERSE_TWIST
|
||||
&& col_energy[best_col] * DTMF_NORMAL_TWIST > row_energy[best_row]) {
|
||||
/* Relative peak test */
|
||||
for (i = 0; i < 4; i++) {
|
||||
if ((i != best_col
|
||||
&& col_energy[i] * DTMF_RELATIVE_PEAK_COL >
|
||||
col_energy[best_col])
|
||||
|| (i != best_row
|
||||
&& row_energy[i] * DTMF_RELATIVE_PEAK_ROW >
|
||||
row_energy[best_row])) {
|
||||
break;
|
||||
}
|
||||
goertzel_init (&s->fax_tone, &fax_detect);
|
||||
goertzel_init (&s->fax_tone2nd, &fax_detect_2nd);
|
||||
s->energy = 0.0;
|
||||
s->current_sample = 0;
|
||||
}
|
||||
/* ... and second harmonic test */
|
||||
if (i >= 4
|
||||
&&
|
||||
(row_energy[best_row] + col_energy[best_col]) > 42.0 * s->energy
|
||||
&&
|
||||
zap_goertzel_result (&s->col_out2nd[best_col]) *
|
||||
DTMF_2ND_HARMONIC_COL < col_energy[best_col]
|
||||
&& zap_goertzel_result (&s->row_out2nd[best_row]) *
|
||||
DTMF_2ND_HARMONIC_ROW < row_energy[best_row]) {
|
||||
hit = dtmf_positions[(best_row << 2) + best_col];
|
||||
/* Look for two successive similar results */
|
||||
/* The logic in the next test is:
|
||||
We need two successive identical clean detects, with
|
||||
something different preceeding it. This can work with
|
||||
back to back differing digits. More importantly, it
|
||||
can work with nasty phones that give a very wobbly start
|
||||
to a digit. */
|
||||
if (hit == s->hit3 && s->hit3 != s->hit2) {
|
||||
s->mhit = hit;
|
||||
s->digit_hits[(best_row << 2) + best_col]++;
|
||||
s->detected_digits++;
|
||||
if (s->current_digits < MAX_DTMF_DIGITS) {
|
||||
s->digits[s->current_digits++] = hit;
|
||||
s->digits[s->current_digits] = '\0';
|
||||
} else {
|
||||
s->lost_digits++;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
if ((!s->mhit) || (s->mhit != hit))
|
||||
{
|
||||
s->mhit = 0;
|
||||
return(0);
|
||||
if (!hit && (fax_energy >= FAX_THRESHOLD)
|
||||
&& (fax_energy > s->energy * 21.0)) {
|
||||
fax_energy_2nd = zap_goertzel_result (&s->fax_tone2nd);
|
||||
if (fax_energy_2nd * FAX_2ND_HARMONIC < fax_energy) {
|
||||
#if 0
|
||||
printf ("Fax energy/Second Harmonic: %f/%f\n", fax_energy,
|
||||
fax_energy_2nd);
|
||||
#endif
|
||||
/* XXX Probably need better checking than just this the energy XXX */
|
||||
hit = 'f';
|
||||
s->fax_hits++;
|
||||
} /* Don't reset fax hits counter */
|
||||
} else {
|
||||
if (s->fax_hits > 5) {
|
||||
s->mhit = 'f';
|
||||
s->detected_digits++;
|
||||
if (s->current_digits < MAX_DTMF_DIGITS) {
|
||||
s->digits[s->current_digits++] = hit;
|
||||
s->digits[s->current_digits] = '\0';
|
||||
} else {
|
||||
s->lost_digits++;
|
||||
}
|
||||
}
|
||||
s->fax_hits = 0;
|
||||
}
|
||||
return (hit);
|
||||
s->hit1 = s->hit2;
|
||||
s->hit2 = s->hit3;
|
||||
s->hit3 = hit;
|
||||
/* Reinitialise the detector for the next block */
|
||||
for (i = 0; i < 4; i++) {
|
||||
goertzel_init (&s->row_out[i], &dtmf_detect_row[i]);
|
||||
goertzel_init (&s->col_out[i], &dtmf_detect_col[i]);
|
||||
goertzel_init (&s->row_out2nd[i], &dtmf_detect_row_2nd[i]);
|
||||
goertzel_init (&s->col_out2nd[i], &dtmf_detect_col_2nd[i]);
|
||||
}
|
||||
goertzel_init (&s->fax_tone, &fax_detect);
|
||||
goertzel_init (&s->fax_tone2nd, &fax_detect_2nd);
|
||||
s->energy = 0.0;
|
||||
s->current_sample = 0;
|
||||
}
|
||||
if ((!s->mhit) || (s->mhit != hit)) {
|
||||
s->mhit = 0;
|
||||
return (0);
|
||||
}
|
||||
return (hit);
|
||||
}
|
||||
|
||||
/*- End of function --------------------------------------------------------*/
|
||||
|
||||
int zap_dtmf_get (dtmf_detect_state_t *s,
|
||||
char *buf,
|
||||
int max)
|
||||
int
|
||||
zap_dtmf_get (dtmf_detect_state_t * s, char *buf, int max)
|
||||
{
|
||||
if (max > s->current_digits)
|
||||
max = s->current_digits;
|
||||
if (max > 0)
|
||||
{
|
||||
memcpy (buf, s->digits, max);
|
||||
memmove (s->digits, s->digits + max, s->current_digits - max);
|
||||
s->current_digits -= max;
|
||||
}
|
||||
buf[max] = '\0';
|
||||
return max;
|
||||
if (max > s->current_digits)
|
||||
max = s->current_digits;
|
||||
if (max > 0) {
|
||||
memcpy (buf, s->digits, max);
|
||||
memmove (s->digits, s->digits + max, s->current_digits - max);
|
||||
s->current_digits -= max;
|
||||
}
|
||||
buf[max] = '\0';
|
||||
return max;
|
||||
}
|
||||
|
||||
/*- End of function --------------------------------------------------------*/
|
||||
/*- End of file ------------------------------------------------------------*/
|
||||
|
|
|
|||
Loading…
Reference in a new issue