git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@661 65c4cc65-6c06-0410-ace0-fbb531ad65f3
1323 lines
38 KiB
C
Executable file
1323 lines
38 KiB
C
Executable file
/*
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* Asterisk -- A telephony toolkit for Linux.
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*
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* Convenience Signal Processing routines
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*
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* Copyright (C) 2002, Digium
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*
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* Mark Spencer <markster@linux-support.net>
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License.
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*
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* Goertzel routines are borrowed from Steve Underwood's tremendous work on the
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* DTMF detector.
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*
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*/
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/* Some routines from tone_detect.c by Steven Underwood as published under the zapata library */
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/*
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tone_detect.c - General telephony tone detection, and specific
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detection of DTMF.
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Copyright (C) 2001 Steve Underwood <steveu@coppice.org>
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Despite my general liking of the GPL, I place this code in the
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public domain for the benefit of all mankind - even the slimy
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ones who might try to proprietize my work and use it to my
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detriment.
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*/
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#include <asterisk/frame.h>
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#include <asterisk/channel.h>
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#include <asterisk/channel_pvt.h>
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#include <asterisk/logger.h>
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#include <asterisk/dsp.h>
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#include <asterisk/ulaw.h>
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#include <asterisk/alaw.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <math.h>
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#include <errno.h>
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#include <stdio.h>
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#define DEFAULT_THRESHOLD 1024
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#define BUSY_THRESHOLD 100 /* Max number of ms difference between max and min times in busy */
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#define BUSY_MIN 80 /* Busy must be at least 80 ms in half-cadence */
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#define BUSY_MAX 1100 /* Busy can't be longer than 1100 ms in half-cadence */
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/* Remember last 3 units */
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#define DSP_HISTORY 5
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/* Number of goertzels for progress detect */
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#define GSAMP_SIZE 183
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#define HZ_350 0
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#define HZ_440 1
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#define HZ_480 2
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#define HZ_620 3
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#define HZ_950 4
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#define HZ_1400 5
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#define HZ_1800 6
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#define TONE_THRESH 10.0 /* How much louder the tone should be than channel energy */
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#define TONE_MIN_THRESH 1e8 /* How much tone there should be at least to attempt */
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#define COUNT_THRESH 3 /* Need at least 50ms of stuff to count it */
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#define TONE_STATE_SILENCE 0
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#define TONE_STATE_RINGING 1
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#define TONE_STATE_DIALTONE 2
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#define TONE_STATE_TALKING 3
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#define TONE_STATE_BUSY 4
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#define TONE_STATE_SPECIAL1 5
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#define TONE_STATE_SPECIAL2 6
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#define TONE_STATE_SPECIAL3 7
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#define MAX_DTMF_DIGITS 128
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/* Basic DTMF specs:
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*
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* Minimum tone on = 40ms
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* Minimum tone off = 50ms
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* Maximum digit rate = 10 per second
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* Normal twist <= 8dB accepted
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* Reverse twist <= 4dB accepted
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* S/N >= 15dB will detect OK
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* Attenuation <= 26dB will detect OK
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* Frequency tolerance +- 1.5% will detect, +-3.5% will reject
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*/
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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_REVERSE_TWIST ((digitmode & DSP_DIGITMODE_RELAXDTMF) ? 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_2ND_HARMONIC_ROW ((digitmode & DSP_DIGITMODE_RELAXDTMF) ? 1.7 : 2.5) /* 4dB normal */
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#define DTMF_2ND_HARMONIC_COL 63.1 /* 18dB */
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#define MF_THRESHOLD 8.0e7
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#define MF_NORMAL_TWIST 5.3 /* 8dB */
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#define MF_REVERSE_TWIST 4.0 /* was 2.5 */
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#define MF_RELATIVE_PEAK 5.3 /* 8dB */
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#define MF_2ND_HARMONIC 1.7 /* was 2.5 */
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typedef struct {
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float v2;
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float v3;
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float fac;
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} goertzel_state_t;
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typedef struct
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{
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int hit1;
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int hit2;
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int hit3;
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int hit4;
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int mhit;
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goertzel_state_t row_out[4];
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goertzel_state_t col_out[4];
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goertzel_state_t row_out2nd[4];
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goertzel_state_t col_out2nd[4];
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goertzel_state_t fax_tone;
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goertzel_state_t fax_tone2nd;
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float energy;
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int current_sample;
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char digits[MAX_DTMF_DIGITS + 1];
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int current_digits;
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int detected_digits;
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int lost_digits;
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int digit_hits[16];
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int fax_hits;
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} dtmf_detect_state_t;
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typedef struct
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{
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int hit1;
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int hit2;
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int hit3;
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int hit4;
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int mhit;
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goertzel_state_t tone_out[6];
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goertzel_state_t tone_out2nd[6];
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float energy;
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int current_sample;
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char digits[MAX_DTMF_DIGITS + 1];
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int current_digits;
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int detected_digits;
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int lost_digits;
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int fax_hits;
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} mf_detect_state_t;
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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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};
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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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};
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static float mf_tones[] =
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{
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700.0, 900.0, 1100.0, 1300.0, 1500.0, 1700.0
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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 char mf_hit[6][6] = {
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/* 700 + */ { 0, '1', '2', '4', '7', 'C' },
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/* 900 + */ { '1', 0, '3', '5', '8', 'A' },
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/* 1100 + */ { '2', '3', 0, '6', '9', '*' },
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/* 1300 + */ { '4', '5', '6', 0, '0', 'B' },
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/* 1500 + */ { '7', '8', '9', '0', 0, '#' },
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/* 1700 + */ { 'C', 'A', '*', 'B', '#', 0 },
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};
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static inline void goertzel_sample(goertzel_state_t *s, short sample)
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{
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float v1;
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float fsamp = sample;
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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 + fsamp;
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}
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static inline void goertzel_update(goertzel_state_t *s, short *samps, int count)
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{
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int i;
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for (i=0;i<count;i++)
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goertzel_sample(s, samps[i]);
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}
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static inline float 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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}
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static inline void goertzel_init(goertzel_state_t *s, float freq)
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{
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s->v2 = s->v3 = 0.0;
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s->fac = 2.0 * cos(2.0 * M_PI * (freq / 8000.0));
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}
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static inline void goertzel_reset(goertzel_state_t *s)
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{
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s->v2 = s->v3 = 0.0;
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}
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struct ast_dsp {
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struct ast_frame f;
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int threshold;
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int totalsilence;
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int totalnoise;
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int features;
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int busymaybe;
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int busycount;
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int historicnoise[DSP_HISTORY];
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int historicsilence[DSP_HISTORY];
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goertzel_state_t freqs[7];
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int gsamps;
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int tstate;
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int tcount;
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int digitmode;
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int thinkdigit;
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float genergy;
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union {
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dtmf_detect_state_t dtmf;
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mf_detect_state_t mf;
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} td;
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};
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static void ast_dtmf_detect_init (dtmf_detect_state_t *s)
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{
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int i;
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s->hit1 =
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s->hit2 = 0;
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for (i = 0; i < 4; i++)
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{
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goertzel_init (&s->row_out[i], dtmf_row[i]);
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goertzel_init (&s->col_out[i], dtmf_col[i]);
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goertzel_init (&s->row_out2nd[i], dtmf_row[i] * 2.0);
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goertzel_init (&s->col_out2nd[i], dtmf_col[i] * 2.0);
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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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goertzel_init (&s->fax_tone, fax_freq);
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/* Same for the fax dector 2nd harmonic */
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goertzel_init (&s->fax_tone2nd, fax_freq * 2.0);
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s->current_sample = 0;
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s->detected_digits = 0;
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s->current_digits = 0;
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memset(&s->digits, 0, sizeof(s->digits));
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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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static void ast_mf_detect_init (mf_detect_state_t *s)
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{
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int i;
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s->hit1 =
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s->hit2 = 0;
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for (i = 0; i < 6; i++)
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{
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goertzel_init (&s->tone_out[i], mf_tones[i]);
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goertzel_init (&s->tone_out2nd[i], mf_tones[i] * 2.0);
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s->energy = 0.0;
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}
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s->current_digits = 0;
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memset(&s->digits, 0, sizeof(s->digits));
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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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static int 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 digitmode, int *writeback)
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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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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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#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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#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;
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s->col_out[1].v3 = s->col_out[1].fac*s->col_out[1].v2 - v1 + famp;
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v1 = s->row_out[2].v2;
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s->row_out[2].v2 = s->row_out[2].v3;
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s->row_out[2].v3 = s->row_out[2].fac*s->row_out[2].v2 - v1 + famp;
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v1 = s->col_out[2].v2;
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s->col_out[2].v2 = s->col_out[2].v3;
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s->col_out[2].v3 = s->col_out[2].fac*s->col_out[2].v2 - v1 + famp;
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v1 = s->row_out[3].v2;
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s->row_out[3].v2 = s->row_out[3].v3;
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s->row_out[3].v3 = s->row_out[3].fac*s->row_out[3].v2 - v1 + famp;
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v1 = s->col_out[3].v2;
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s->col_out[3].v2 = s->col_out[3].v3;
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s->col_out[3].v3 = s->col_out[3].fac*s->col_out[3].v2 - v1 + famp;
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v1 = s->col_out2nd[0].v2;
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s->col_out2nd[0].v2 = s->col_out2nd[0].v3;
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s->col_out2nd[0].v3 = s->col_out2nd[0].fac*s->col_out2nd[0].v2 - v1 + famp;
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v1 = s->row_out2nd[0].v2;
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s->row_out2nd[0].v2 = s->row_out2nd[0].v3;
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s->row_out2nd[0].v3 = s->row_out2nd[0].fac*s->row_out2nd[0].v2 - v1 + famp;
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v1 = s->col_out2nd[1].v2;
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s->col_out2nd[1].v2 = s->col_out2nd[1].v3;
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s->col_out2nd[1].v3 = s->col_out2nd[1].fac*s->col_out2nd[1].v2 - v1 + famp;
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v1 = s->row_out2nd[1].v2;
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s->row_out2nd[1].v2 = s->row_out2nd[1].v3;
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s->row_out2nd[1].v3 = s->row_out2nd[1].fac*s->row_out2nd[1].v2 - v1 + famp;
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v1 = s->col_out2nd[2].v2;
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s->col_out2nd[2].v2 = s->col_out2nd[2].v3;
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s->col_out2nd[2].v3 = s->col_out2nd[2].fac*s->col_out2nd[2].v2 - v1 + famp;
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v1 = s->row_out2nd[2].v2;
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s->row_out2nd[2].v2 = s->row_out2nd[2].v3;
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s->row_out2nd[2].v3 = s->row_out2nd[2].fac*s->row_out2nd[2].v2 - v1 + famp;
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v1 = s->col_out2nd[3].v2;
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s->col_out2nd[3].v2 = s->col_out2nd[3].v3;
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s->col_out2nd[3].v3 = s->col_out2nd[3].fac*s->col_out2nd[3].v2 - v1 + famp;
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v1 = s->row_out2nd[3].v2;
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s->row_out2nd[3].v2 = s->row_out2nd[3].v3;
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s->row_out2nd[3].v3 = s->row_out2nd[3].fac*s->row_out2nd[3].v2 - v1 + famp;
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/* Update fax tone */
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v1 = s->fax_tone.v2;
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s->fax_tone.v2 = s->fax_tone.v3;
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s->fax_tone.v3 = s->fax_tone.fac*s->fax_tone.v2 - v1 + famp;
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v1 = s->fax_tone.v2;
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s->fax_tone2nd.v2 = s->fax_tone2nd.v3;
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s->fax_tone2nd.v3 = s->fax_tone2nd.fac*s->fax_tone2nd.v2 - v1 + famp;
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}
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#endif
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s->current_sample += (limit - sample);
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if (s->current_sample < 102) {
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if (hit && !((digitmode & DSP_DIGITMODE_NOQUELCH))) {
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/* If we had a hit last time, go ahead and clear this out since likely it
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will be another hit */
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for (i=sample;i<limit;i++)
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amp[i] = 0;
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*writeback = 1;
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}
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continue;
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}
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/* Detect the fax energy, too */
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fax_energy = goertzel_result(&s->fax_tone);
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/* We are at the end of a DTMF detection block */
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/* Find the peak row and the peak column */
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row_energy[0] = goertzel_result (&s->row_out[0]);
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col_energy[0] = goertzel_result (&s->col_out[0]);
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for (best_row = best_col = 0, i = 1; i < 4; i++)
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{
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row_energy[i] = goertzel_result (&s->row_out[i]);
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if (row_energy[i] > row_energy[best_row])
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best_row = i;
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col_energy[i] = goertzel_result (&s->col_out[i]);
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if (col_energy[i] > col_energy[best_col])
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best_col = i;
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}
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hit = 0;
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/* Basic signal level test and the twist test */
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if (row_energy[best_row] >= DTMF_THRESHOLD
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|
&&
|
|
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
|
|
&&
|
|
goertzel_result (&s->col_out2nd[best_col])*DTMF_2ND_HARMONIC_COL < col_energy[best_col]
|
|
&&
|
|
goertzel_result (&s->row_out2nd[best_row])*DTMF_2ND_HARMONIC_ROW < row_energy[best_row])
|
|
{
|
|
/* Got a hit */
|
|
hit = dtmf_positions[(best_row << 2) + best_col];
|
|
if (!(digitmode & DSP_DIGITMODE_NOQUELCH)) {
|
|
/* Zero out frame data if this is part DTMF */
|
|
for (i=sample;i<limit;i++)
|
|
amp[i] = 0;
|
|
*writeback = 1;
|
|
}
|
|
/* 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 = 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) {
|
|
hit = 'f';
|
|
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_reset(&s->row_out[i]);
|
|
goertzel_reset(&s->col_out[i]);
|
|
goertzel_reset(&s->row_out2nd[i]);
|
|
goertzel_reset(&s->col_out2nd[i]);
|
|
}
|
|
goertzel_reset (&s->fax_tone);
|
|
goertzel_reset (&s->fax_tone2nd);
|
|
s->energy = 0.0;
|
|
s->current_sample = 0;
|
|
}
|
|
if ((!s->mhit) || (s->mhit != hit))
|
|
{
|
|
s->mhit = 0;
|
|
return(0);
|
|
}
|
|
return (hit);
|
|
}
|
|
|
|
/* MF goertzel size */
|
|
#define MF_GSIZE 160
|
|
|
|
static int mf_detect (mf_detect_state_t *s,
|
|
int16_t amp[],
|
|
int samples,
|
|
int digitmode, int *writeback)
|
|
{
|
|
|
|
float tone_energy[6];
|
|
float famp;
|
|
float v1;
|
|
int i;
|
|
int j;
|
|
int sample;
|
|
int best1;
|
|
int best2;
|
|
float max;
|
|
int hit;
|
|
int limit;
|
|
int sofarsogood;
|
|
|
|
hit = 0;
|
|
for (sample = 0; sample < samples; sample = limit)
|
|
{
|
|
/* 80 is optimised to meet the MF specs. */
|
|
if ((samples - sample) >= (MF_GSIZE - s->current_sample))
|
|
limit = sample + (MF_GSIZE - s->current_sample);
|
|
else
|
|
limit = samples;
|
|
#if defined(USE_3DNOW)
|
|
_dtmf_goertzel_update (s->row_out, amp + sample, limit - sample);
|
|
_dtmf_goertzel_update (s->col_out, amp + sample, limit - sample);
|
|
_dtmf_goertzel_update (s->row_out2nd, amp + sample, limit2 - sample);
|
|
_dtmf_goertzel_update (s->col_out2nd, amp + sample, limit2 - sample);
|
|
/* XXX Need to fax detect for 3dnow too XXX */
|
|
#warning "Fax Support Broken"
|
|
#else
|
|
/* 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];
|
|
|
|
s->energy += famp*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->tone_out[0].v2;
|
|
s->tone_out[0].v2 = s->tone_out[0].v3;
|
|
s->tone_out[0].v3 = s->tone_out[0].fac*s->tone_out[0].v2 - v1 + famp;
|
|
|
|
v1 = s->tone_out[1].v2;
|
|
s->tone_out[1].v2 = s->tone_out[1].v3;
|
|
s->tone_out[1].v3 = s->tone_out[1].fac*s->tone_out[1].v2 - v1 + famp;
|
|
|
|
v1 = s->tone_out[2].v2;
|
|
s->tone_out[2].v2 = s->tone_out[2].v3;
|
|
s->tone_out[2].v3 = s->tone_out[2].fac*s->tone_out[2].v2 - v1 + famp;
|
|
|
|
v1 = s->tone_out[3].v2;
|
|
s->tone_out[3].v2 = s->tone_out[3].v3;
|
|
s->tone_out[3].v3 = s->tone_out[3].fac*s->tone_out[3].v2 - v1 + famp;
|
|
|
|
v1 = s->tone_out[4].v2;
|
|
s->tone_out[4].v2 = s->tone_out[4].v3;
|
|
s->tone_out[4].v3 = s->tone_out[4].fac*s->tone_out[4].v2 - v1 + famp;
|
|
|
|
v1 = s->tone_out[5].v2;
|
|
s->tone_out[5].v2 = s->tone_out[5].v3;
|
|
s->tone_out[5].v3 = s->tone_out[5].fac*s->tone_out[5].v2 - v1 + famp;
|
|
|
|
v1 = s->tone_out2nd[0].v2;
|
|
s->tone_out2nd[0].v2 = s->tone_out2nd[0].v3;
|
|
s->tone_out2nd[0].v3 = s->tone_out2nd[0].fac*s->tone_out2nd[0].v2 - v1 + famp;
|
|
|
|
v1 = s->tone_out2nd[1].v2;
|
|
s->tone_out2nd[1].v2 = s->tone_out2nd[1].v3;
|
|
s->tone_out2nd[1].v3 = s->tone_out2nd[1].fac*s->tone_out2nd[1].v2 - v1 + famp;
|
|
|
|
v1 = s->tone_out2nd[2].v2;
|
|
s->tone_out2nd[2].v2 = s->tone_out2nd[2].v3;
|
|
s->tone_out2nd[2].v3 = s->tone_out2nd[2].fac*s->tone_out2nd[2].v2 - v1 + famp;
|
|
|
|
v1 = s->tone_out2nd[3].v2;
|
|
s->tone_out2nd[3].v2 = s->tone_out2nd[3].v3;
|
|
s->tone_out2nd[3].v3 = s->tone_out2nd[3].fac*s->tone_out2nd[3].v2 - v1 + famp;
|
|
|
|
v1 = s->tone_out2nd[4].v2;
|
|
s->tone_out2nd[4].v2 = s->tone_out2nd[4].v3;
|
|
s->tone_out2nd[4].v3 = s->tone_out2nd[4].fac*s->tone_out2nd[2].v2 - v1 + famp;
|
|
|
|
v1 = s->tone_out2nd[3].v2;
|
|
s->tone_out2nd[5].v2 = s->tone_out2nd[6].v3;
|
|
s->tone_out2nd[5].v3 = s->tone_out2nd[6].fac*s->tone_out2nd[3].v2 - v1 + famp;
|
|
|
|
}
|
|
#endif
|
|
s->current_sample += (limit - sample);
|
|
if (s->current_sample < MF_GSIZE) {
|
|
if (hit && !((digitmode & DSP_DIGITMODE_NOQUELCH))) {
|
|
/* If we had a hit last time, go ahead and clear this out since likely it
|
|
will be another hit */
|
|
for (i=sample;i<limit;i++)
|
|
amp[i] = 0;
|
|
*writeback = 1;
|
|
}
|
|
continue;
|
|
}
|
|
|
|
/* We're at the end of an MF detection block. Go ahead and calculate
|
|
all the energies. */
|
|
for (i=0;i<6;i++) {
|
|
tone_energy[i] = goertzel_result(&s->tone_out[i]);
|
|
}
|
|
|
|
/* Find highest */
|
|
best1 = 0;
|
|
max = tone_energy[0];
|
|
for (i=1;i<6;i++) {
|
|
if (tone_energy[i] > max) {
|
|
max = tone_energy[i];
|
|
best1 = i;
|
|
}
|
|
}
|
|
|
|
/* Find 2nd highest */
|
|
if (best1)
|
|
max = tone_energy[0];
|
|
else
|
|
max = tone_energy[1];
|
|
best2 = 0;
|
|
for (i=0;i<6;i++) {
|
|
if (i == best1) continue;
|
|
if (tone_energy[i] > max) {
|
|
max = tone_energy[i];
|
|
best2 = i;
|
|
}
|
|
}
|
|
|
|
hit = 0;
|
|
sofarsogood=1;
|
|
/* Check for relative energies */
|
|
for (i=0;i<6;i++) {
|
|
if (i == best1) continue;
|
|
if (i == best2) continue;
|
|
if (tone_energy[best1] < tone_energy[i] * MF_RELATIVE_PEAK) {
|
|
sofarsogood = 0;
|
|
break;
|
|
}
|
|
if (tone_energy[best2] < tone_energy[i] * MF_RELATIVE_PEAK) {
|
|
sofarsogood = 0;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (sofarsogood) {
|
|
/* Check for 2nd harmonic */
|
|
if (goertzel_result(&s->tone_out2nd[best1]) * MF_2ND_HARMONIC > tone_energy[best1])
|
|
sofarsogood = 0;
|
|
else if (goertzel_result(&s->tone_out2nd[best1]) * MF_2ND_HARMONIC > tone_energy[best2])
|
|
sofarsogood = 0;
|
|
}
|
|
if (sofarsogood) {
|
|
hit = mf_hit[best1][best2];
|
|
if (!(digitmode & DSP_DIGITMODE_NOQUELCH)) {
|
|
/* Zero out frame data if this is part DTMF */
|
|
for (i=sample;i<limit;i++)
|
|
amp[i] = 0;
|
|
*writeback = 1;
|
|
}
|
|
/* Look for two consecutive clean hits */
|
|
if ((hit == s->hit3) && (s->hit3 != s->hit2)) {
|
|
s->mhit = hit;
|
|
s->detected_digits++;
|
|
if (s->current_digits < MAX_DTMF_DIGITS - 2) {
|
|
s->digits[s->current_digits++] = hit;
|
|
s->digits[s->current_digits] = '\0';
|
|
} else {
|
|
s->lost_digits++;
|
|
}
|
|
}
|
|
}
|
|
|
|
s->hit1 = s->hit2;
|
|
s->hit2 = s->hit3;
|
|
s->hit3 = hit;
|
|
/* Reinitialise the detector for the next block */
|
|
for (i = 0; i < 6; i++)
|
|
{
|
|
goertzel_reset(&s->tone_out[i]);
|
|
goertzel_reset(&s->tone_out2nd[i]);
|
|
}
|
|
s->energy = 0.0;
|
|
s->current_sample = 0;
|
|
}
|
|
if ((!s->mhit) || (s->mhit != hit))
|
|
{
|
|
s->mhit = 0;
|
|
return(0);
|
|
}
|
|
return (hit);
|
|
}
|
|
|
|
static int __ast_dsp_digitdetect(struct ast_dsp *dsp, short *s, int len, int *writeback)
|
|
{
|
|
int res;
|
|
if (dsp->digitmode & DSP_DIGITMODE_MF)
|
|
res = mf_detect(&dsp->td.mf, s, len, dsp->digitmode & DSP_DIGITMODE_RELAXDTMF, writeback);
|
|
else
|
|
res = dtmf_detect(&dsp->td.dtmf, s, len, dsp->digitmode & DSP_DIGITMODE_RELAXDTMF, writeback);
|
|
return res;
|
|
}
|
|
|
|
int ast_dsp_digitdetect(struct ast_dsp *dsp, struct ast_frame *inf)
|
|
{
|
|
short *s;
|
|
int len;
|
|
int ign=0;
|
|
if (inf->frametype != AST_FRAME_VOICE) {
|
|
ast_log(LOG_WARNING, "Can't check call progress of non-voice frames\n");
|
|
return 0;
|
|
}
|
|
if (inf->subclass != AST_FORMAT_SLINEAR) {
|
|
ast_log(LOG_WARNING, "Can only check call progress in signed-linear frames\n");
|
|
return 0;
|
|
}
|
|
s = inf->data;
|
|
len = inf->datalen / 2;
|
|
return __ast_dsp_digitdetect(dsp, s, len, &ign);
|
|
}
|
|
|
|
static inline int pair_there(float p1, float p2, float i1, float i2, float e)
|
|
{
|
|
/* See if p1 and p2 are there, relative to i1 and i2 and total energy */
|
|
/* Make sure absolute levels are high enough */
|
|
if ((p1 < TONE_MIN_THRESH) || (p2 < TONE_MIN_THRESH))
|
|
return 0;
|
|
/* Amplify ignored stuff */
|
|
i2 *= TONE_THRESH;
|
|
i1 *= TONE_THRESH;
|
|
e *= TONE_THRESH;
|
|
/* Check first tone */
|
|
if ((p1 < i1) || (p1 < i2) || (p1 < e))
|
|
return 0;
|
|
/* And second */
|
|
if ((p2 < i1) || (p2 < i2) || (p2 < e))
|
|
return 0;
|
|
/* Guess it's there... */
|
|
return 1;
|
|
}
|
|
|
|
int ast_dsp_getdigits (struct ast_dsp *dsp,
|
|
char *buf,
|
|
int max)
|
|
{
|
|
if (dsp->digitmode & DSP_DIGITMODE_MF) {
|
|
if (max > dsp->td.mf.current_digits)
|
|
max = dsp->td.mf.current_digits;
|
|
if (max > 0)
|
|
{
|
|
memcpy (buf, dsp->td.mf.digits, max);
|
|
memmove (dsp->td.mf.digits, dsp->td.mf.digits + max, dsp->td.mf.current_digits - max);
|
|
dsp->td.mf.current_digits -= max;
|
|
}
|
|
buf[max] = '\0';
|
|
return max;
|
|
} else {
|
|
if (max > dsp->td.dtmf.current_digits)
|
|
max = dsp->td.dtmf.current_digits;
|
|
if (max > 0)
|
|
{
|
|
memcpy (buf, dsp->td.dtmf.digits, max);
|
|
memmove (dsp->td.dtmf.digits, dsp->td.dtmf.digits + max, dsp->td.dtmf.current_digits - max);
|
|
dsp->td.dtmf.current_digits -= max;
|
|
}
|
|
buf[max] = '\0';
|
|
return max;
|
|
}
|
|
}
|
|
|
|
static int __ast_dsp_call_progress(struct ast_dsp *dsp, short *s, int len)
|
|
{
|
|
int x;
|
|
int pass;
|
|
int newstate = TONE_STATE_SILENCE;
|
|
int res = 0;
|
|
while(len) {
|
|
/* Take the lesser of the number of samples we need and what we have */
|
|
pass = len;
|
|
if (pass > GSAMP_SIZE - dsp->gsamps)
|
|
pass = GSAMP_SIZE - dsp->gsamps;
|
|
for (x=0;x<pass;x++) {
|
|
goertzel_sample(&dsp->freqs[HZ_350], s[x]);
|
|
goertzel_sample(&dsp->freqs[HZ_440], s[x]);
|
|
goertzel_sample(&dsp->freqs[HZ_480], s[x]);
|
|
goertzel_sample(&dsp->freqs[HZ_620], s[x]);
|
|
goertzel_sample(&dsp->freqs[HZ_950], s[x]);
|
|
goertzel_sample(&dsp->freqs[HZ_1400], s[x]);
|
|
goertzel_sample(&dsp->freqs[HZ_1800], s[x]);
|
|
dsp->genergy += s[x] * s[x];
|
|
}
|
|
s += pass;
|
|
dsp->gsamps += pass;
|
|
len -= pass;
|
|
if (dsp->gsamps == GSAMP_SIZE) {
|
|
float hz_350;
|
|
float hz_440;
|
|
float hz_480;
|
|
float hz_620;
|
|
float hz_950;
|
|
float hz_1400;
|
|
float hz_1800;
|
|
hz_350 = goertzel_result(&dsp->freqs[HZ_350]);
|
|
hz_440 = goertzel_result(&dsp->freqs[HZ_440]);
|
|
hz_480 = goertzel_result(&dsp->freqs[HZ_480]);
|
|
hz_620 = goertzel_result(&dsp->freqs[HZ_620]);
|
|
hz_950 = goertzel_result(&dsp->freqs[HZ_950]);
|
|
hz_1400 = goertzel_result(&dsp->freqs[HZ_1400]);
|
|
hz_1800 = goertzel_result(&dsp->freqs[HZ_1800]);
|
|
#if 0
|
|
printf("Got whole dsp state: 350: %e, 440: %e, 480: %e, 620: %e, 950: %e, 1400: %e, 1800: %e, Energy: %e\n",
|
|
hz_350, hz_440, hz_480, hz_620, hz_950, hz_1400, hz_1800, dsp->genergy);
|
|
#endif
|
|
if (pair_there(hz_480, hz_620, hz_350, hz_440, dsp->genergy)) {
|
|
newstate = TONE_STATE_BUSY;
|
|
} else if (pair_there(hz_440, hz_480, hz_350, hz_620, dsp->genergy)) {
|
|
newstate = TONE_STATE_RINGING;
|
|
} else if (pair_there(hz_350, hz_440, hz_480, hz_620, dsp->genergy)) {
|
|
newstate = TONE_STATE_DIALTONE;
|
|
} else if (hz_950 > TONE_MIN_THRESH * TONE_THRESH) {
|
|
newstate = TONE_STATE_SPECIAL1;
|
|
} else if (hz_1400 > TONE_MIN_THRESH * TONE_THRESH) {
|
|
if (dsp->tstate == TONE_STATE_SPECIAL1)
|
|
newstate = TONE_STATE_SPECIAL2;
|
|
} else if (hz_1800 > TONE_MIN_THRESH * TONE_THRESH) {
|
|
if (dsp->tstate == TONE_STATE_SPECIAL2)
|
|
newstate = TONE_STATE_SPECIAL3;
|
|
} else if (dsp->genergy > TONE_MIN_THRESH * TONE_THRESH) {
|
|
newstate = TONE_STATE_TALKING;
|
|
} else
|
|
newstate = TONE_STATE_SILENCE;
|
|
|
|
if (newstate == dsp->tstate) {
|
|
dsp->tcount++;
|
|
if (dsp->tcount == COUNT_THRESH) {
|
|
if (dsp->tstate == TONE_STATE_BUSY) {
|
|
res = AST_CONTROL_BUSY;
|
|
dsp->features &= ~DSP_FEATURE_CALL_PROGRESS;
|
|
} else if (dsp->tstate == TONE_STATE_TALKING) {
|
|
res = AST_CONTROL_ANSWER;
|
|
dsp->features &= ~DSP_FEATURE_CALL_PROGRESS;
|
|
} else if (dsp->tstate == TONE_STATE_RINGING)
|
|
res = AST_CONTROL_RINGING;
|
|
else if (dsp->tstate == TONE_STATE_SPECIAL3) {
|
|
res = AST_CONTROL_CONGESTION;
|
|
dsp->features &= ~DSP_FEATURE_CALL_PROGRESS;
|
|
}
|
|
|
|
}
|
|
} else {
|
|
#if 0
|
|
printf("Newstate: %d\n", newstate);
|
|
#endif
|
|
dsp->tstate = newstate;
|
|
dsp->tcount = 1;
|
|
}
|
|
|
|
/* Reset goertzel */
|
|
for (x=0;x<7;x++)
|
|
dsp->freqs[x].v2 = dsp->freqs[x].v3 = 0.0;
|
|
dsp->gsamps = 0;
|
|
dsp->genergy = 0.0;
|
|
}
|
|
}
|
|
#if 0
|
|
if (res)
|
|
printf("Returning %d\n", res);
|
|
#endif
|
|
return res;
|
|
}
|
|
|
|
int ast_dsp_call_progress(struct ast_dsp *dsp, struct ast_frame *inf)
|
|
{
|
|
if (inf->frametype != AST_FRAME_VOICE) {
|
|
ast_log(LOG_WARNING, "Can't check call progress of non-voice frames\n");
|
|
return 0;
|
|
}
|
|
if (inf->subclass != AST_FORMAT_SLINEAR) {
|
|
ast_log(LOG_WARNING, "Can only check call progress in signed-linear frames\n");
|
|
return 0;
|
|
}
|
|
return __ast_dsp_call_progress(dsp, inf->data, inf->datalen / 2);
|
|
}
|
|
|
|
static int __ast_dsp_silence(struct ast_dsp *dsp, short *s, int len, int *totalsilence)
|
|
{
|
|
int accum;
|
|
int x;
|
|
int res = 0;
|
|
|
|
accum = 0;
|
|
for (x=0;x<len; x++)
|
|
accum += abs(s[x]);
|
|
accum /= x;
|
|
if (accum < dsp->threshold) {
|
|
dsp->totalsilence += len/8;
|
|
if (dsp->totalnoise) {
|
|
/* Move and save history */
|
|
memmove(dsp->historicnoise, dsp->historicnoise + 1, sizeof(dsp->historicnoise) - sizeof(dsp->historicnoise[0]));
|
|
dsp->historicnoise[DSP_HISTORY - 1] = dsp->totalnoise;
|
|
dsp->busymaybe = 1;
|
|
}
|
|
dsp->totalnoise = 0;
|
|
res = 1;
|
|
} else {
|
|
dsp->totalnoise += len/8;
|
|
if (dsp->totalsilence) {
|
|
/* Move and save history */
|
|
memmove(dsp->historicsilence, dsp->historicsilence + 1, sizeof(dsp->historicsilence) - sizeof(dsp->historicsilence[0]));
|
|
dsp->historicsilence[DSP_HISTORY - 1] = dsp->totalsilence;
|
|
dsp->busymaybe = 1;
|
|
}
|
|
dsp->totalsilence = 0;
|
|
}
|
|
if (totalsilence)
|
|
*totalsilence = dsp->totalsilence;
|
|
return res;
|
|
}
|
|
|
|
int ast_dsp_busydetect(struct ast_dsp *dsp)
|
|
{
|
|
int x;
|
|
int res = 0;
|
|
int max, min;
|
|
if (dsp->busymaybe) {
|
|
#if 0
|
|
printf("Maybe busy!\n");
|
|
#endif
|
|
dsp->busymaybe = 0;
|
|
min = 9999;
|
|
max = 0;
|
|
for (x=DSP_HISTORY - dsp->busycount;x<DSP_HISTORY;x++) {
|
|
#if 0
|
|
printf("Silence: %d, Noise: %d\n", dsp->historicsilence[x], dsp->historicnoise[x]);
|
|
#endif
|
|
if (dsp->historicsilence[x] < min)
|
|
min = dsp->historicsilence[x];
|
|
if (dsp->historicnoise[x] < min)
|
|
min = dsp->historicnoise[x];
|
|
if (dsp->historicsilence[x] > max)
|
|
max = dsp->historicsilence[x];
|
|
if (dsp->historicnoise[x] > max)
|
|
max = dsp->historicnoise[x];
|
|
}
|
|
if ((max - min < BUSY_THRESHOLD) && (max < BUSY_MAX) && (min > BUSY_MIN)) {
|
|
#if 0
|
|
printf("Busy!\n");
|
|
#endif
|
|
res = 1;
|
|
}
|
|
#if 0
|
|
printf("Min: %d, max: %d\n", min, max);
|
|
#endif
|
|
}
|
|
return res;
|
|
}
|
|
|
|
int ast_dsp_silence(struct ast_dsp *dsp, struct ast_frame *f, int *totalsilence)
|
|
{
|
|
short *s;
|
|
int len;
|
|
|
|
if (f->frametype != AST_FRAME_VOICE) {
|
|
ast_log(LOG_WARNING, "Can't calculate silence on a non-voice frame\n");
|
|
return 0;
|
|
}
|
|
if (f->subclass != AST_FORMAT_SLINEAR) {
|
|
ast_log(LOG_WARNING, "Can only calculate silence on signed-linear frames :(\n");
|
|
return 0;
|
|
}
|
|
s = f->data;
|
|
len = f->datalen/2;
|
|
return __ast_dsp_silence(dsp, s, len, totalsilence);
|
|
}
|
|
|
|
struct ast_frame *ast_dsp_process(struct ast_channel *chan, struct ast_dsp *dsp, struct ast_frame *af, int needlock)
|
|
{
|
|
int silence;
|
|
int res;
|
|
int digit;
|
|
int x;
|
|
unsigned short *shortdata;
|
|
unsigned char *odata;
|
|
int len;
|
|
int writeback = 0;
|
|
|
|
#define FIX_INF(inf) do { \
|
|
if (writeback) { \
|
|
switch(inf->subclass) { \
|
|
case AST_FORMAT_SLINEAR: \
|
|
break; \
|
|
case AST_FORMAT_ULAW: \
|
|
for (x=0;x<len;x++) \
|
|
odata[x] = AST_LIN2MU(shortdata[x]); \
|
|
break; \
|
|
case AST_FORMAT_ALAW: \
|
|
for (x=0;x<len;x++) \
|
|
odata[x] = AST_LIN2A(shortdata[x]); \
|
|
break; \
|
|
} \
|
|
} \
|
|
} while(0)
|
|
|
|
if (!af)
|
|
return NULL;
|
|
if (af->frametype != AST_FRAME_VOICE)
|
|
return af;
|
|
odata = af->data;
|
|
len = af->datalen;
|
|
/* Make sure we have short data */
|
|
switch(af->subclass) {
|
|
case AST_FORMAT_SLINEAR:
|
|
shortdata = af->data;
|
|
len = af->datalen / 2;
|
|
break;
|
|
case AST_FORMAT_ULAW:
|
|
shortdata = alloca(af->datalen * 2);
|
|
if (!shortdata) {
|
|
ast_log(LOG_WARNING, "Unable to allocate stack space for data: %s\n", strerror(errno));
|
|
return af;
|
|
}
|
|
for (x=0;x<len;x++)
|
|
shortdata[x] = AST_MULAW(odata[x]);
|
|
break;
|
|
case AST_FORMAT_ALAW:
|
|
shortdata = alloca(af->datalen * 2);
|
|
if (!shortdata) {
|
|
ast_log(LOG_WARNING, "Unable to allocate stack space for data: %s\n", strerror(errno));
|
|
return af;
|
|
}
|
|
for (x=0;x<len;x++)
|
|
shortdata[x] = AST_ALAW(odata[x]);
|
|
break;
|
|
default:
|
|
ast_log(LOG_WARNING, "Unable to detect process %d frames\n", af->subclass);
|
|
return af;
|
|
}
|
|
silence = __ast_dsp_silence(dsp, shortdata, len, NULL);
|
|
if ((dsp->features & DSP_FEATURE_SILENCE_SUPPRESS) && silence) {
|
|
memset(&dsp->f, 0, sizeof(dsp->f));
|
|
dsp->f.frametype = AST_FRAME_NULL;
|
|
return &dsp->f;
|
|
}
|
|
if ((dsp->features & DSP_FEATURE_BUSY_DETECT) && ast_dsp_busydetect(dsp)) {
|
|
memset(&dsp->f, 0, sizeof(dsp->f));
|
|
dsp->f.frametype = AST_FRAME_CONTROL;
|
|
dsp->f.subclass = AST_CONTROL_BUSY;
|
|
return &dsp->f;
|
|
}
|
|
if ((dsp->features & DSP_FEATURE_DTMF_DETECT)) {
|
|
digit = __ast_dsp_digitdetect(dsp, shortdata, len, &writeback);
|
|
#if 0
|
|
if (digit)
|
|
printf("Performing digit detection returned %d, digitmode is %d\n", digit, dsp->digitmode);
|
|
#endif
|
|
if (dsp->digitmode & (DSP_DIGITMODE_MUTECONF | DSP_DIGITMODE_MUTEMAX)) {
|
|
if (!dsp->thinkdigit) {
|
|
if (digit) {
|
|
/* Looks like we might have something. Request a conference mute for the moment */
|
|
memset(&dsp->f, 0, sizeof(dsp->f));
|
|
dsp->f.frametype = AST_FRAME_DTMF;
|
|
dsp->f.subclass = 'm';
|
|
dsp->thinkdigit = 'x';
|
|
FIX_INF(af);
|
|
if (chan)
|
|
ast_queue_frame(chan, af, needlock);
|
|
ast_frfree(af);
|
|
return &dsp->f;
|
|
}
|
|
} else {
|
|
if (digit) {
|
|
/* Thought we saw one last time. Pretty sure we really have now */
|
|
if (dsp->thinkdigit)
|
|
dsp->thinkdigit = digit;
|
|
} else {
|
|
if (dsp->thinkdigit) {
|
|
memset(&dsp->f, 0, sizeof(dsp->f));
|
|
if (dsp->thinkdigit != 'x') {
|
|
/* If we found a digit, send it now */
|
|
dsp->f.frametype = AST_FRAME_DTMF;
|
|
dsp->f.subclass = dsp->thinkdigit;
|
|
if (chan)
|
|
ast_queue_frame(chan, &dsp->f, needlock);
|
|
}
|
|
dsp->f.frametype = AST_FRAME_DTMF;
|
|
dsp->f.subclass = 'u';
|
|
dsp->thinkdigit = 0;
|
|
FIX_INF(af);
|
|
if (chan)
|
|
ast_queue_frame(chan, af, needlock);
|
|
ast_frfree(af);
|
|
return &dsp->f;
|
|
}
|
|
}
|
|
}
|
|
} else if (!digit) {
|
|
/* Only check when there is *not* a hit... */
|
|
if (dsp->digitmode & DSP_DIGITMODE_MF) {
|
|
if (dsp->td.mf.current_digits) {
|
|
memset(&dsp->f, 0, sizeof(dsp->f));
|
|
dsp->f.frametype = AST_FRAME_DTMF;
|
|
dsp->f.subclass = dsp->td.mf.digits[0];
|
|
memmove(dsp->td.mf.digits, dsp->td.mf.digits + 1, dsp->td.mf.current_digits);
|
|
dsp->td.mf.current_digits--;
|
|
FIX_INF(af);
|
|
if (chan)
|
|
ast_queue_frame(chan, af, needlock);
|
|
ast_frfree(af);
|
|
return &dsp->f;
|
|
}
|
|
} else {
|
|
if (dsp->td.dtmf.current_digits) {
|
|
memset(&dsp->f, 0, sizeof(dsp->f));
|
|
dsp->f.frametype = AST_FRAME_DTMF;
|
|
dsp->f.subclass = dsp->td.dtmf.digits[0];
|
|
memmove(dsp->td.dtmf.digits, dsp->td.dtmf.digits + 1, dsp->td.dtmf.current_digits);
|
|
dsp->td.dtmf.current_digits--;
|
|
FIX_INF(af);
|
|
if (chan)
|
|
ast_queue_frame(chan, af, needlock);
|
|
ast_frfree(af);
|
|
return &dsp->f;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if ((dsp->features & DSP_FEATURE_CALL_PROGRESS)) {
|
|
res = __ast_dsp_call_progress(dsp, shortdata, len);
|
|
memset(&dsp->f, 0, sizeof(dsp->f));
|
|
dsp->f.frametype = AST_FRAME_CONTROL;
|
|
if (res) {
|
|
switch(res) {
|
|
case AST_CONTROL_ANSWER:
|
|
case AST_CONTROL_BUSY:
|
|
case AST_CONTROL_RINGING:
|
|
case AST_CONTROL_CONGESTION:
|
|
dsp->f.subclass = res;
|
|
if (chan)
|
|
ast_queue_frame(chan, &dsp->f, needlock);
|
|
break;
|
|
default:
|
|
ast_log(LOG_WARNING, "Don't know how to represent call progress message %d\n", res);
|
|
}
|
|
}
|
|
}
|
|
FIX_INF(af);
|
|
return af;
|
|
}
|
|
|
|
struct ast_dsp *ast_dsp_new(void)
|
|
{
|
|
struct ast_dsp *dsp;
|
|
dsp = malloc(sizeof(struct ast_dsp));
|
|
if (dsp) {
|
|
memset(dsp, 0, sizeof(struct ast_dsp));
|
|
dsp->threshold = DEFAULT_THRESHOLD;
|
|
dsp->features = DSP_FEATURE_SILENCE_SUPPRESS;
|
|
dsp->busycount = 3;
|
|
/* Initialize goertzels */
|
|
goertzel_init(&dsp->freqs[HZ_350], 350.0);
|
|
goertzel_init(&dsp->freqs[HZ_440], 440.0);
|
|
goertzel_init(&dsp->freqs[HZ_480], 480.0);
|
|
goertzel_init(&dsp->freqs[HZ_620], 620.0);
|
|
goertzel_init(&dsp->freqs[HZ_950], 950.0);
|
|
goertzel_init(&dsp->freqs[HZ_1400], 1400.0);
|
|
goertzel_init(&dsp->freqs[HZ_1800], 1800.0);
|
|
/* Initialize DTMF detector */
|
|
ast_dtmf_detect_init(&dsp->td.dtmf);
|
|
}
|
|
return dsp;
|
|
}
|
|
|
|
void ast_dsp_set_features(struct ast_dsp *dsp, int features)
|
|
{
|
|
dsp->features = features;
|
|
}
|
|
|
|
void ast_dsp_free(struct ast_dsp *dsp)
|
|
{
|
|
free(dsp);
|
|
}
|
|
|
|
void ast_dsp_set_busy_count(struct ast_dsp *dsp, int cadences)
|
|
{
|
|
if (cadences < 1)
|
|
cadences = 1;
|
|
if (cadences > DSP_HISTORY)
|
|
cadences = DSP_HISTORY;
|
|
dsp->busycount = cadences;
|
|
}
|
|
|
|
void ast_dsp_digitreset(struct ast_dsp *dsp)
|
|
{
|
|
int i;
|
|
dsp->thinkdigit = 0;
|
|
if (dsp->digitmode & DSP_DIGITMODE_MF) {
|
|
memset(dsp->td.mf.digits, 0, sizeof(dsp->td.mf.digits));
|
|
dsp->td.mf.current_digits = 0;
|
|
/* Reinitialise the detector for the next block */
|
|
for (i = 0; i < 6; i++) {
|
|
goertzel_reset(&dsp->td.mf.tone_out[i]);
|
|
goertzel_reset(&dsp->td.mf.tone_out2nd[i]);
|
|
}
|
|
dsp->td.mf.energy = 0.0;
|
|
dsp->td.mf.current_sample = 0;
|
|
dsp->td.mf.hit1 = dsp->td.mf.hit2 = dsp->td.mf.hit3 = dsp->td.mf.hit4 = dsp->td.mf.mhit = 0;
|
|
} else {
|
|
memset(dsp->td.dtmf.digits, 0, sizeof(dsp->td.dtmf.digits));
|
|
dsp->td.dtmf.current_digits = 0;
|
|
/* Reinitialise the detector for the next block */
|
|
for (i = 0; i < 4; i++) {
|
|
goertzel_reset(&dsp->td.dtmf.row_out[i]);
|
|
goertzel_reset(&dsp->td.dtmf.col_out[i]);
|
|
goertzel_reset(&dsp->td.dtmf.row_out2nd[i]);
|
|
goertzel_reset(&dsp->td.dtmf.col_out2nd[i]);
|
|
}
|
|
goertzel_reset (&dsp->td.dtmf.fax_tone);
|
|
goertzel_reset (&dsp->td.dtmf.fax_tone2nd);
|
|
dsp->td.dtmf.energy = 0.0;
|
|
dsp->td.dtmf.current_sample = 0;
|
|
dsp->td.dtmf.hit1 = dsp->td.dtmf.hit2 = dsp->td.dtmf.hit3 = dsp->td.dtmf.hit4 = dsp->td.dtmf.mhit = 0;
|
|
}
|
|
}
|
|
|
|
void ast_dsp_reset(struct ast_dsp *dsp)
|
|
{
|
|
int x;
|
|
dsp->totalsilence = 0;
|
|
dsp->gsamps = 0;
|
|
for (x=0;x<4;x++)
|
|
dsp->freqs[x].v2 = dsp->freqs[x].v3 = 0.0;
|
|
memset(dsp->historicsilence, 0, sizeof(dsp->historicsilence));
|
|
memset(dsp->historicnoise, 0, sizeof(dsp->historicnoise));
|
|
|
|
}
|
|
|
|
int ast_dsp_digitmode(struct ast_dsp *dsp, int digitmode)
|
|
{
|
|
int new, old;
|
|
old = dsp->digitmode & (DSP_DIGITMODE_DTMF | DSP_DIGITMODE_MF | DSP_DIGITMODE_MUTECONF | DSP_DIGITMODE_MUTEMAX);
|
|
new = digitmode & (DSP_DIGITMODE_DTMF | DSP_DIGITMODE_MF | DSP_DIGITMODE_MUTECONF | DSP_DIGITMODE_MUTEMAX);
|
|
if (old != new) {
|
|
/* Must initialize structures if switching from MF to DTMF or vice-versa */
|
|
if (new & DSP_DIGITMODE_MF)
|
|
ast_mf_detect_init(&dsp->td.mf);
|
|
else
|
|
ast_dtmf_detect_init(&dsp->td.dtmf);
|
|
}
|
|
dsp->digitmode = digitmode;
|
|
return 0;
|
|
}
|