/*
* SpanDSP - a series of DSP components for telephony
*
* sig_tone_tests.c
*
* Written by Steve Underwood <steveu@coppice.org>
*
* Copyright (C) 2004 Steve Underwood
*
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2, as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* $Id: sig_tone_tests.c,v 1.25 2009/05/30 15:23:14 steveu Exp $
*/
/*! \file */
/*! \page sig_tone_tests_page The signaling tone processor tests
\section sig_tone_tests_sec_1 What does it do?
???.
\section sig_tone_tests_sec_2 How does it work?
???.
*/
#if defined(HAVE_CONFIG_H)
#include "config.h"
#endif
#include <stdlib.h>
#include <stdio.h>
#include <memory.h>
#include <sndfile.h>
//#if defined(WITH_SPANDSP_INTERNALS)
#define SPANDSP_EXPOSE_INTERNAL_STRUCTURES
//#endif
#include "spandsp.h"
#include "spandsp-sim.h"
#define OUT_FILE_NAME "sig_tone.wav"
#define SAMPLES_PER_CHUNK 160
static int sampleno = 0;
static int tone_1_present = 0;
static int tone_2_present = 0;
static int ping = 0;
void map_frequency_response(sig_tone_rx_state_t *s);
static int tx_handler(void *user_data, int what)
{
//printf("What - %d\n", what);
if ((what & SIG_TONE_UPDATE_REQUEST))
{
printf("Tx: update request\n");
/* The signaling processor wants to know what to do next */
if (sampleno < ms_to_samples(100))
{
/* 100ms off-hook */
printf("100ms off-hook - %d samples\n", 800 - sampleno);
return 0x02 | ((ms_to_samples(100) - sampleno) << 16);
}
else if (sampleno < ms_to_samples(600))
{
/* 500ms idle */
printf("500ms idle - %d samples\n", ms_to_samples(600) - sampleno);
return 0x02 | SIG_TONE_1_PRESENT | ((ms_to_samples(600) - sampleno) << 16);
}
else if (sampleno < ms_to_samples(700))
{
/* 100ms seize */
printf("100ms seize - %d samples\n", ms_to_samples(700) - sampleno);
return 0x02 | ((ms_to_samples(700) - sampleno) << 16);
}
else if (sampleno < ms_to_samples(1700))
{
if (ping)
{
printf("33ms break - %d samples\n", ms_to_samples(33));
ping = !ping;
return 0x02 | (ms_to_samples(33) << 16);
}
else
{
printf("67ms make - %d samples\n", ms_to_samples(67));
ping = !ping;
return 0x02 | SIG_TONE_1_PRESENT | (ms_to_samples(67) << 16);
}
/*endif*/
}
else
{
return 0x02 | SIG_TONE_1_PRESENT | ((ms_to_samples(700) - sampleno) << 16) | SIG_TONE_TX_PASSTHROUGH;
}
/*endif*/
}
/*endif*/
return 0;
}
/*- End of function --------------------------------------------------------*/
static int rx_handler(void *user_data, int what)
{
//printf("What - %d\n", what);
if ((what & SIG_TONE_1_CHANGE))
{
tone_1_present = what & SIG_TONE_1_PRESENT;
printf("Rx: tone 1 is %s after %d samples\n", (tone_1_present) ? "on" : "off", (what >> 16) & 0xFFFF);
}
/*endif*/
if ((what & SIG_TONE_2_CHANGE))
{
tone_2_present = what & SIG_TONE_2_PRESENT;
printf("Rx: tone 2 is %s after %d samples\n", (tone_2_present) ? "on" : "off", (what >> 16) & 0xFFFF);
}
/*endif*/
return 0;
}
/*- End of function --------------------------------------------------------*/
void map_frequency_response(sig_tone_rx_state_t *s)
{
int16_t buf[8192];
awgn_state_t noise_source;
int i;
int f;
uint32_t phase_acc;
int32_t phase_rate;
int32_t scaling;
double sum;
/* Things like noise don't highlight the frequency response of the high Q notch
very well. We use a slowly swept frequency to check it. */
awgn_init_dbm0(&noise_source, 1234567, -10.0f);
for (f = 1; f < 4000; f++)
{
phase_rate = dds_phase_rate(f);
scaling = dds_scaling_dbm0(-10);
phase_acc = 0;
for (i = 0; i < 8192; i++)
buf[i] = dds_mod(&phase_acc, phase_rate, scaling, 0);
/*endfor*/
sig_tone_rx(s, buf, 8192);
sum = 0.0;
for (i = 1000; i < 8192; i++)
sum += (double) buf[i]*(double) buf[i];
/*endfor*/
sum = sqrt(sum);
printf("%7d %f\n", f, sum);
}
/*endfor*/
}
/*- End of function --------------------------------------------------------*/
int main(int argc, char *argv[])
{
int16_t amp[SAMPLES_PER_CHUNK];
int16_t out_amp[2*SAMPLES_PER_CHUNK];
SNDFILE *outhandle;
int outframes;
int i;
int type;
int rx_samples;
int tx_samples;
sig_tone_tx_state_t tx_state;
sig_tone_rx_state_t rx_state;
awgn_state_t noise_source;
codec_munge_state_t *munge;
if ((outhandle = sf_open_telephony_write(OUT_FILE_NAME, 2)) == NULL)
{
fprintf(stderr, " Cannot create audio file '%s'\n", OUT_FILE_NAME);
exit(2);
}
/*endif*/
awgn_init_dbm0(&noise_source, 1234567, -10.0f);
for (type = 1; type <= 3; type++)
{
sampleno = 0;
tone_1_present = 0;
tone_2_present = 0;
ping = 0;
munge = NULL;
switch (type)
{
case 1:
printf("2280Hz tests.\n");
munge = codec_munge_init(MUNGE_CODEC_ALAW, 0);
sig_tone_tx_init(&tx_state, SIG_TONE_2280HZ, tx_handler, NULL);
sig_tone_rx_init(&rx_state, SIG_TONE_2280HZ, rx_handler, NULL);
rx_state.current_rx_tone |= SIG_TONE_RX_PASSTHROUGH;
break;
case 2:
printf("26000Hz tests.\n");
munge = codec_munge_init(MUNGE_CODEC_ULAW, 0);
sig_tone_tx_init(&tx_state, SIG_TONE_2600HZ, tx_handler, NULL);
sig_tone_rx_init(&rx_state, SIG_TONE_2600HZ, rx_handler, NULL);
rx_state.current_rx_tone |= SIG_TONE_RX_PASSTHROUGH;
break;
case 3:
printf("2400Hz/26000Hz tests.\n");
munge = codec_munge_init(MUNGE_CODEC_ULAW, 0);
sig_tone_tx_init(&tx_state, SIG_TONE_2400HZ_2600HZ, tx_handler, NULL);
sig_tone_rx_init(&rx_state, SIG_TONE_2400HZ_2600HZ, rx_handler, NULL);
rx_state.current_rx_tone |= SIG_TONE_RX_PASSTHROUGH;
break;
}
/*endswitch*/
//map_frequency_response(&rx_state);
for (sampleno = 0; sampleno < 20000; sampleno += SAMPLES_PER_CHUNK)
{
for (i = 0; i < SAMPLES_PER_CHUNK; i++)
amp[i] = awgn(&noise_source);
/*endfor*/
tx_samples = sig_tone_tx(&tx_state, amp, SAMPLES_PER_CHUNK);
for (i = 0; i < tx_samples; i++)
out_amp[2*i] = amp[i];
/*endfor*/
codec_munge(munge, amp, tx_samples);
rx_samples = sig_tone_rx(&rx_state, amp, tx_samples);
for (i = 0; i < rx_samples; i++)
out_amp[2*i + 1] = amp[i];
/*endfor*/
outframes = sf_writef_short(outhandle, out_amp, rx_samples);
if (outframes != rx_samples)
{
fprintf(stderr, " Error writing audio file\n");
exit(2);
}
/*endif*/
}
/*endfor*/
}
/*endfor*/
if (sf_close(outhandle) != 0)
{
fprintf(stderr, " Cannot close audio file '%s'\n", OUT_FILE_NAME);
exit(2);
}
/*endif*/
printf("Tests completed.\n");
return 0;
}
/*- End of function --------------------------------------------------------*/
/*- End of file ------------------------------------------------------------*/