kenmirrors
/
freeswitch
mirror of https://github.com/signalwire/freeswitch.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity
freeswitch/libs/spandsp/tests/v22bis_tests.c

483 lines
15 KiB
C
Raw Blame History

/*
* SpanDSP - a series of DSP components for telephony
*
* v22bis_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.
*/
/*! \page v22bis_tests_page V.22bis modem tests
\section v22bis_tests_page_sec_1 What does it do?
These tests connect two V.22bis modems back to back, through a telephone line
model. BER testing is then used to evaluate performance under various line
conditions.
If the appropriate GUI environment exists, the tests are built such that a visual
display of modem status is maintained.
\section v22bis_tests_page_sec_2 How is it used?
*/
#if defined(HAVE_CONFIG_H)
#include "config.h"
#endif
#if defined(HAVE_FL_FL_H) && defined(HAVE_FL_FL_CARTESIAN_H) && defined(HAVE_FL_FL_AUDIO_METER_H)
#define ENABLE_GUI
#endif
#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <sndfile.h>
#define SPANDSP_EXPOSE_INTERNAL_STRUCTURES
#include "spandsp.h"
#include "spandsp-sim.h"
#if defined(ENABLE_GUI)
#include "modem_monitor.h"
#endif
#define BLOCK_LEN 160
#define OUT_FILE_NAME "v22bis.wav"
char *decode_test_file = NULL;
bool use_gui = false;
int rx_bits = 0;
both_ways_line_model_state_t *model;
typedef struct
{
v22bis_state_t *v22bis;
bert_state_t bert_tx;
bert_state_t bert_rx;
bert_results_t latest_results;
#if defined(ENABLE_GUI)
qam_monitor_t *qam_monitor;
#endif
float smooth_power;
int symbol_no;
} endpoint_t;
endpoint_t endpoint[2];
static void reporter(void *user_data, int reason, bert_results_t *results)
{
endpoint_t *s;
s = (endpoint_t *) user_data;
switch (reason)
{
case BERT_REPORT_REGULAR:
fprintf(stderr, "V.22bis rx %p BERT report regular - %d bits, %d bad bits, %d resyncs\n",
user_data,
results->total_bits,
results->bad_bits,
results->resyncs);
memcpy(&s->latest_results, results, sizeof(s->latest_results));
break;
default:
fprintf(stderr,
"V.22bis rx %p BERT report %s\n",
user_data,
bert_event_to_str(reason));
break;
}
}
/*- End of function --------------------------------------------------------*/
static void v22bis_rx_status(void *user_data, int status)
{
endpoint_t *s;
int bit_rate;
int i;
int len;
#if defined(SPANDSP_USE_FIXED_POINT)
complexi16_t *coeffs;
#else
complexf_t *coeffs;
#endif
/* Special conditions */
s = (endpoint_t *) user_data;
printf("V.22bis rx %p status is %s (%d)\n", user_data, signal_status_to_str(status), status);
switch (status)
{
case SIG_STATUS_TRAINING_SUCCEEDED:
bit_rate = v22bis_get_current_bit_rate(s->v22bis);
printf("Negotiated bit rate: %d\n", bit_rate);
if ((len = v22bis_rx_equalizer_state(s->v22bis, &coeffs)))
{
printf("Equalizer:\n");
for (i = 0; i < len; i++)
#if defined(SPANDSP_USE_FIXED_POINT)
printf("%3d (%15.5f, %15.5f)\n", i, coeffs[i].re/V22BIS_CONSTELLATION_SCALING_FACTOR, coeffs[i].im/V22BIS_CONSTELLATION_SCALING_FACTOR);
#else
printf("%3d (%15.5f, %15.5f) -> %15.5f\n", i, coeffs[i].re, coeffs[i].im, powerf(&coeffs[i]));
#endif
}
break;
}
}
/*- End of function --------------------------------------------------------*/
static void v22bis_putbit(void *user_data, int bit)
{
endpoint_t *s;
if (bit < 0)
{
v22bis_rx_status(user_data, bit);
return;
}
s = (endpoint_t *) user_data;
if (decode_test_file)
printf("Rx bit %p-%d - %d\n", user_data, rx_bits++, bit);
else
bert_put_bit(&s->bert_rx, bit);
}
/*- End of function --------------------------------------------------------*/
static int v22bis_getbit(void *user_data)
{
endpoint_t *s;
int bit;
s = (endpoint_t *) user_data;
bit = bert_get_bit(&s->bert_tx);
return bit;
}
/*- End of function --------------------------------------------------------*/
#if defined(SPANDSP_USE_FIXED_POINT)
static void qam_report(void *user_data, const complexi16_t *constel, const complexi16_t *target, int symbol)
#else
static void qam_report(void *user_data, const complexf_t *constel, const complexf_t *target, int symbol)
#endif
{
int i;
int len;
#if defined(SPANDSP_USE_FIXED_POINT)
complexi16_t *coeffs;
#else
complexf_t *coeffs;
#endif
complexf_t constel_point;
complexf_t target_point;
float fpower;
endpoint_t *s;
s = (endpoint_t *) user_data;
if (constel)
{
constel_point.re = constel->re/V22BIS_CONSTELLATION_SCALING_FACTOR;
constel_point.im = constel->im/V22BIS_CONSTELLATION_SCALING_FACTOR;
target_point.re = target->re/V22BIS_CONSTELLATION_SCALING_FACTOR;
target_point.im = target->im/V22BIS_CONSTELLATION_SCALING_FACTOR;
#if defined(ENABLE_GUI)
if (use_gui)
{
qam_monitor_update_constel(s->qam_monitor, &constel_point);
qam_monitor_update_carrier_tracking(s->qam_monitor, v22bis_rx_carrier_frequency(s->v22bis));
qam_monitor_update_symbol_tracking(s->qam_monitor, v22bis_rx_symbol_timing_correction(s->v22bis));
}
#endif
fpower = (constel->re - target->re)*(constel->re - target->re)
+ (constel->im - target->im)*(constel->im - target->im);
s->smooth_power = 0.95f*s->smooth_power + 0.05f*fpower;
printf("%8d [%8.4f, %8.4f] [%8.4f, %8.4f] %2x %8.4f %8.4f %8.4f\n",
s->symbol_no,
constel_point.re,
constel_point.im,
target_point.re,
target_point.im,
symbol,
fpower,
s->smooth_power,
v22bis_rx_signal_power(s->v22bis));
s->symbol_no++;
}
else
{
printf("Gardner step %d\n", symbol);
if ((len = v22bis_rx_equalizer_state(s->v22bis, &coeffs)))
{
printf("Equalizer A:\n");
for (i = 0; i < len; i++)
#if defined(SPANDSP_USE_FIXED_POINT)
printf("%3d (%15.5f, %15.5f)\n", i, coeffs[i].re/V22BIS_CONSTELLATION_SCALING_FACTOR, coeffs[i].im/V22BIS_CONSTELLATION_SCALING_FACTOR);
#else
printf("%3d (%15.5f, %15.5f) -> %15.5f\n", i, coeffs[i].re, coeffs[i].im, powerf(&coeffs[i]));
#endif
#if defined(ENABLE_GUI)
if (use_gui)
{
#if defined(SPANDSP_USE_FIXED_POINT)
qam_monitor_update_int_equalizer(s->qam_monitor, coeffs, len);
#else
qam_monitor_update_equalizer(s->qam_monitor, coeffs, len);
#endif
}
#endif
}
}
}
/*- End of function --------------------------------------------------------*/
int main(int argc, char *argv[])
{
int16_t amp[2][BLOCK_LEN];
int16_t model_amp[2][BLOCK_LEN];
int16_t out_amp[2*BLOCK_LEN];
SNDFILE *inhandle;
SNDFILE *outhandle;
int outframes;
int samples;
int samples2;
int i;
int j;
int test_bps;
int line_model_no;
int channel_codec;
int rbs_pattern;
int bits_per_test;
int noise_level;
int signal_level;
int guard_tone_option;
int opt;
bool log_audio;
channel_codec = MUNGE_CODEC_NONE;
rbs_pattern = 0;
test_bps = 2400;
line_model_no = 0;
decode_test_file = NULL;
noise_level = -70;
signal_level = -13;
bits_per_test = 50000;
guard_tone_option = V22BIS_GUARD_TONE_1800HZ;
log_audio = false;
while ((opt = getopt(argc, argv, "b:B:c:d:gG:lm:n:r:s:")) != -1)
{
switch (opt)
{
case 'b':
test_bps = atoi(optarg);
if (test_bps != 2400 && test_bps != 1200)
{
fprintf(stderr, "Invalid bit rate specified\n");
exit(2);
}
break;
case 'B':
bits_per_test = atoi(optarg);
break;
case 'c':
channel_codec = atoi(optarg);
break;
case 'd':
decode_test_file = optarg;
break;
case 'g':
#if defined(ENABLE_GUI)
use_gui = true;
#else
fprintf(stderr, "Graphical monitoring not available\n");
exit(2);
#endif
break;
case 'G':
guard_tone_option = atoi(optarg);
break;
case 'l':
log_audio = true;
break;
case 'm':
line_model_no = atoi(optarg);
break;
case 'n':
noise_level = atoi(optarg);
break;
case 'r':
rbs_pattern = atoi(optarg);
break;
case 's':
signal_level = atoi(optarg);
break;
default:
//usage();
exit(2);
break;
}
}
inhandle = NULL;
if (decode_test_file)
{
/* We will decode the audio from a file. */
if ((inhandle = sf_open_telephony_read(decode_test_file, 1)) == NULL)
{
fprintf(stderr, " Cannot open audio file '%s'\n", decode_test_file);
exit(2);
}
}
outhandle = NULL;
if (log_audio)
{
if ((outhandle = sf_open_telephony_write(OUT_FILE_NAME, 2)) == NULL)
{
fprintf(stderr, " Cannot create audio file '%s'\n", OUT_FILE_NAME);
exit(2);
}
}
memset(endpoint, 0, sizeof(endpoint));
for (i = 0; i < 2; i++)
{
endpoint[i].v22bis = v22bis_init(NULL, test_bps, guard_tone_option, (i == 0), v22bis_getbit, &endpoint[i], v22bis_putbit, &endpoint[i]);
v22bis_tx_power(endpoint[i].v22bis, signal_level);
/* Move the carrier off a bit */
endpoint[i].v22bis->tx.carrier_phase_rate = dds_phase_ratef((i == 0) ? 1207.0f : 2407.0f);
v22bis_rx_set_qam_report_handler(endpoint[i].v22bis, qam_report, (void *) &endpoint[i]);
span_log_set_level(&endpoint[i].v22bis->logging, SPAN_LOG_SHOW_SEVERITY | SPAN_LOG_SHOW_PROTOCOL | SPAN_LOG_SHOW_TAG | SPAN_LOG_SHOW_SAMPLE_TIME | SPAN_LOG_FLOW);
span_log_set_tag(&endpoint[i].v22bis->logging, (i == 0) ? "caller" : "answerer");
endpoint[i].smooth_power = 0.0f;
endpoint[i].symbol_no = 0;
bert_init(&endpoint[i].bert_tx, bits_per_test, BERT_PATTERN_ITU_O152_11, test_bps, 20);
bert_init(&endpoint[i].bert_rx, bits_per_test, BERT_PATTERN_ITU_O152_11, test_bps, 20);
bert_set_report(&endpoint[i].bert_rx, 10000, reporter, &endpoint[i]);
}
#if defined(ENABLE_GUI)
if (use_gui)
{
endpoint[0].qam_monitor = qam_monitor_init(6.0f, V22BIS_CONSTELLATION_SCALING_FACTOR, "Calling modem");
endpoint[1].qam_monitor = qam_monitor_init(6.0f, V22BIS_CONSTELLATION_SCALING_FACTOR, "Answering modem");
}
#endif
if ((model = both_ways_line_model_init(line_model_no,
(float) noise_level,
-15.0f,
-15.0f,
line_model_no,
(float) noise_level,
-15.0f,
-15.0f,
channel_codec,
rbs_pattern)) == NULL)
{
fprintf(stderr, " Failed to create line model\n");
exit(2);
}
samples = 0;
for (;;)
{
for (i = 0; i < 2; i++)
{
samples = v22bis_tx(endpoint[i].v22bis, amp[i], BLOCK_LEN);
#if defined(ENABLE_GUI)
if (use_gui)
qam_monitor_update_audio_level(endpoint[i].qam_monitor, amp[i], samples);
#endif
if (samples == 0)
{
/* Note that we might get a few bad bits as the carrier shuts down. */
bert_result(&endpoint[i].bert_rx, &endpoint[i].latest_results);
bert_init(&endpoint[i].bert_tx, bits_per_test, BERT_PATTERN_ITU_O152_11, test_bps, 20);
bert_init(&endpoint[i].bert_rx, bits_per_test, BERT_PATTERN_ITU_O152_11, test_bps, 20);
bert_set_report(&endpoint[i].bert_rx, 10000, reporter, &endpoint[i]);
printf("Restarting on zero output\n");
v22bis_restart(endpoint[i].v22bis, test_bps);
}
}
#if 1
both_ways_line_model(model,
model_amp[0],
amp[0],
model_amp[1],
amp[1],
samples);
#else
vec_copyi16(model_amp[0], amp[0], samples);
vec_copyi16(model_amp[1], amp[1], samples);
#endif
if (decode_test_file)
{
samples2 = sf_readf_short(inhandle, model_amp[0], samples);
if (samples2 != samples)
break;
}
for (i = 0; i < 2; i++)
{
span_log_bump_samples(&endpoint[i].v22bis->logging, samples);
v22bis_rx(endpoint[i ^ 1].v22bis, model_amp[i], samples);
for (j = 0; j < samples; j++)
out_amp[2*j + i] = model_amp[i][j];
for ( ; j < BLOCK_LEN; j++)
out_amp[2*j + i] = 0;
}
if (log_audio)
{
outframes = sf_writef_short(outhandle, out_amp, BLOCK_LEN);
if (outframes != BLOCK_LEN)
{
fprintf(stderr, " Error writing audio file\n");
exit(2);
}
}
}
both_ways_line_model_free(model);
#if defined(ENABLE_GUI)
if (use_gui)
qam_wait_to_end(endpoint[0].qam_monitor);
#endif
if (decode_test_file)
{
if (sf_close_telephony(inhandle))
{
fprintf(stderr, " Cannot close audio file '%s'\n", decode_test_file);
exit(2);
}
}
if (log_audio)
{
if (sf_close_telephony(outhandle))
{
fprintf(stderr, " Cannot close audio file '%s'\n", OUT_FILE_NAME);
exit(2);
}
}
return 0;
}
/*- End of function --------------------------------------------------------*/
/*- End of file ------------------------------------------------------------*/
Reference in New Issue View Git Blame Copy Permalink