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Viewing changes to lib/spandsp/src/dtmf.c

  • Committer: Bazaar Package Importer
  • Author(s): Julien BLACHE
  • Date: 2007-05-15 09:43:53 UTC
  • mfrom: (1.1.5 upstream)
  • Revision ID: james.westby@ubuntu.com-20070515094353-bpr27hxvt6taxugb
Tags: 0.3.0~dfsg-1
* New upstream release.
  + Now supports V.17 reception; see changelog for details.

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lib/spandsp/src/dtmf.c
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 * along with this program; if not, write to the Free Software
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 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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 *
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 * $Id: dtmf.c,v 1.12 2007/01/03 14:15:35 steveu Exp $
 
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 * $Id: dtmf.c,v 1.14 2007/02/27 16:52:16 steveu Exp $
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 */
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/*! \file dtmf.h */
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#include "spandsp/telephony.h"
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#include "spandsp/tone_detect.h"
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#include "spandsp/tone_generate.h"
 
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#include "spandsp/super_tone_rx.h"
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#include "spandsp/dtmf.h"
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#if !defined(M_PI)
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//#define USE_3DNOW
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#define ms_to_samples(t)            (((t)*SAMPLE_RATE)/1000)
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#define DTMF_DURATION               ms_to_samples(70)
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#define DTMF_PAUSE                  ms_to_samples(80)
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#define DTMF_CYCLE                  (DTMF_DURATION + DTMF_PAUSE)
 
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#define DEFAULT_DTMF_TX_LEVEL       -10
 
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#define DEFAULT_DTMF_TX_ON_TIME     50
 
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#define DEFAULT_DTMF_TX_OFF_TIME    55
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#define DTMF_THRESHOLD              8.0e7f
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#define DTMF_NORMAL_TWIST           6.3f    /* 8dB */
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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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/*- End of function --------------------------------------------------------*/
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#endif
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/*- End of function --------------------------------------------------------*/
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int dtmf_rx(dtmf_rx_state_t *s, const int16_t amp[], int samples)
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{
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                {
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                    /* Avoid reporting multiple no digit conditions on flaky hits */
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                    if (s->in_digit  ||  hit)
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                        s->realtime_callback(s->realtime_callback_data, hit);
 
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                    {
 
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                        i = (s->in_digit  &&  !hit)  ?  -99  :  rint(log10f(s->energy)*10.0f - 20.08f - 90.30F + DBM0_MAX_POWER);
 
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                        s->realtime_callback(s->realtime_callback_data, hit, i);
 
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                    }
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                }
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                else
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                {
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            goertzel_reset(&s->row_out[i]);
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            goertzel_reset(&s->col_out[i]);
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        }
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        s->energy = 0.0;
 
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        s->energy = 0.0f;
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        s->current_sample = 0;
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    }
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    if (s->current_digits  &&  s->callback)
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/*- End of function --------------------------------------------------------*/
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void dtmf_rx_set_realtime_callback(dtmf_rx_state_t *s,
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                                   void (*callback)(void *user_data, int signal),
 
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                                   tone_report_func_t callback,
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                                   void *user_data)
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{
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    s->realtime_callback = callback;
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{
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    if (filter_dialtone >= 0)
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    {
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        s->z350_1 = 0.0;
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        s->z350_2 = 0.0;
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        s->z440_1 = 0.0;
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        s->z440_2 = 0.0;
 
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        s->z350_1 = 0.0f;
 
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        s->z350_2 = 0.0f;
 
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        s->z440_1 = 0.0f;
 
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        s->z440_2 = 0.0f;
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        s->filter_dialtone = filter_dialtone;
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    }
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    if (twist >= 0)
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        s->normal_twist = powf(10.0, twist/10.0);
 
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        s->normal_twist = powf(10.0f, twist/10.0f);
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    if (reverse_twist >= 0)
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        s->reverse_twist = powf(10.0, reverse_twist/10.0);
 
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        s->reverse_twist = powf(10.0f, reverse_twist/10.0f);
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}
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/*- End of function --------------------------------------------------------*/
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dtmf_rx_state_t *dtmf_rx_init(dtmf_rx_state_t *s,
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                              void (*callback)(void *user_data, const char *digits, int len),
 
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                              dtmf_rx_callback_t callback,
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                              void *user_data)
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{
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    int i;
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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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    }
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    s->energy = 0.0;
 
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    s->energy = 0.0f;
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    s->current_sample = 0;
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    s->lost_digits = 0;
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    s->current_digits = 0;
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        {
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            make_tone_gen_descriptor(&dtmf_digit_tones[row*4 + col],
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                                     (int) dtmf_row[row],
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                                     -10,
 
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                                     DEFAULT_DTMF_TX_LEVEL,
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                                     (int) dtmf_col[col],
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                                     -10,
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                                     50,
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                                     55,
 
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                                     DEFAULT_DTMF_TX_LEVEL,
 
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                                     DEFAULT_DTMF_TX_ON_TIME,
 
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                                     DEFAULT_DTMF_TX_OFF_TIME,
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                                     0,
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                                     0,
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                                     FALSE);