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freeswitch/libs/spandsp/tests/t38_decode.c

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/*
* SpanDSP - a series of DSP components for telephony
*
* t38_decode.c
*
* Written by Steve Underwood <steveu@coppice.org>
*
* Copyright (C) 2009 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.
*
* Some code from SIPP (http://sf.net/projects/sipp) was used as a model
* for how to work with PCAP files. That code was authored by Guillaume
* TEISSIER from FTR&D 02/02/2006, and released under the GPL2 licence.
*/
#if defined(HAVE_CONFIG_H)
#include "config.h"
#endif
#include <stdlib.h>
#include <inttypes.h>
#include <stdio.h>
#include <fcntl.h>
#include <string.h>
#include <assert.h>
#include <errno.h>
#include <time.h>
#if !defined(_WIN32)
#include <unistd.h>
#endif
#include "udptl.h"
#include "spandsp.h"
#include "fax_utils.h"
#include "pcap_parse.h"
#define INPUT_FILE_NAME "t38.pcap"
#define OUTPUT_FILE_NAME "t38pcap.tif"
t38_terminal_state_t *t38_state;
struct timeval now;
static int phase_b_handler(t30_state_t *s, void *user_data, int result)
{
int i;
char tag[20];
i = (int) (intptr_t) user_data;
snprintf(tag, sizeof(tag), "%c: Phase B", i);
printf("%c: Phase B handler on channel %c - (0x%X) %s\n", i, i, result, t30_frametype(result));
log_rx_parameters(s, tag);
return T30_ERR_OK;
}
/*- End of function --------------------------------------------------------*/
static int phase_d_handler(t30_state_t *s, void *user_data, int result)
{
int i;
char tag[20];
i = (int) (intptr_t) user_data;
snprintf(tag, sizeof(tag), "%c: Phase D", i);
printf("%c: Phase D handler on channel %c - (0x%X) %s\n", i, i, result, t30_frametype(result));
log_transfer_statistics(s, tag);
log_tx_parameters(s, tag);
log_rx_parameters(s, tag);
return T30_ERR_OK;
}
/*- End of function --------------------------------------------------------*/
static void phase_e_handler(t30_state_t *s, void *user_data, int result)
{
int i;
t30_stats_t t;
char tag[20];
i = (int) (intptr_t) user_data;
snprintf(tag, sizeof(tag), "%c: Phase E", i);
printf("%c: Phase E handler on channel %c - (%d) %s\n", i, i, result, t30_completion_code_to_str(result));
log_transfer_statistics(s, tag);
log_tx_parameters(s, tag);
log_rx_parameters(s, tag);
t30_get_transfer_statistics(s, &t);
}
/*- End of function --------------------------------------------------------*/
static int tx_packet_handler(t38_core_state_t *s, void *user_data, const uint8_t *buf, int len, int count)
{
return 0;
}
/*- End of function --------------------------------------------------------*/
static int timing_update(void *user_data, struct timeval *ts)
{
t30_state_t *t30;
t38_core_state_t *t38_core;
logging_state_t *logging;
int samples;
int partial;
static int64_t current = 0;
int64_t when;
int64_t diff;
memcpy(&now, ts, sizeof(now));
when = ts->tv_sec*1000000LL + ts->tv_usec;
if (current == 0)
current = when;
diff = when - current;
samples = diff/125LL;
while (samples > 0)
{
partial = (samples > 160) ? 160 : samples;
//fprintf(stderr, "Update time by %d samples\n", partial);
logging = t38_terminal_get_logging_state(t38_state);
span_log_bump_samples(logging, partial);
t38_core = t38_terminal_get_t38_core_state(t38_state);
logging = t38_core_get_logging_state(t38_core);
span_log_bump_samples(logging, partial);
t30 = t38_terminal_get_t30_state(t38_state);
logging = t30_get_logging_state(t30);
span_log_bump_samples(logging, partial);
t38_terminal_send_timeout(t38_state, partial);
current = when;
samples -= partial;
}
return 0;
}
/*- End of function --------------------------------------------------------*/
static int ifp_handler(void *user_data, const uint8_t msg[], int len, int seq_no)
{
t38_core_state_t *t38_core;
int i;
printf("%5d >>> ", seq_no);
for (i = 0; i < len; i++)
printf("%02X ", msg[i]);
printf("\n");
t38_core = t38_terminal_get_t38_core_state(t38_state);
t38_core_rx_ifp_packet(t38_core, msg, len, seq_no);
return 0;
}
/*- End of function --------------------------------------------------------*/
static int process_packet(void *user_data, const uint8_t *pkt, int len)
{
static udptl_state_t *state = NULL;
if (state == NULL)
state = udptl_init(NULL, UDPTL_ERROR_CORRECTION_REDUNDANCY, 3, 3, ifp_handler, NULL);
udptl_rx_packet(state, pkt, len);
return 0;
}
/*- End of function --------------------------------------------------------*/
int main(int argc, char *argv[])
{
t30_state_t *t30;
t38_core_state_t *t38_core;
logging_state_t *logging;
const char *input_file_name;
int t38_version;
int use_ecm;
int use_tep;
int options;
int supported_modems;
int fill_removal;
int opt;
uint32_t src_addr;
uint16_t src_port;
uint32_t dest_addr;
uint16_t dest_port;
use_ecm = FALSE;
t38_version = 1;
options = 0;
input_file_name = INPUT_FILE_NAME;
fill_removal = FALSE;
use_tep = FALSE;
supported_modems = T30_SUPPORT_V27TER | T30_SUPPORT_V29 | T30_SUPPORT_V17;
src_addr = 0;
src_port = 0;
dest_addr = 0;
dest_port = 0;
while ((opt = getopt(argc, argv, "D:d:eFi:m:oS:s:tv:")) != -1)
{
switch (opt)
{
case 'D':
dest_addr = atoi(optarg);
break;
case 'd':
dest_port = atoi(optarg);
break;
case 'e':
use_ecm = TRUE;
break;
case 'F':
fill_removal = TRUE;
break;
case 'i':
input_file_name = optarg;
break;
case 'm':
supported_modems = atoi(optarg);
break;
case 'o':
options = atoi(optarg);
break;
case 'S':
src_addr = atoi(optarg);
break;
case 's':
src_port = atoi(optarg);
break;
case 't':
use_tep = TRUE;
break;
case 'v':
t38_version = atoi(optarg);
break;
default:
//usage();
exit(2);
break;
}
}
if ((t38_state = t38_terminal_init(NULL, FALSE, tx_packet_handler, NULL)) == NULL)
{
fprintf(stderr, "Cannot start the T.38 channel\n");
exit(2);
}
t30 = t38_terminal_get_t30_state(t38_state);
t38_core = t38_terminal_get_t38_core_state(t38_state);
t38_set_t38_version(t38_core, t38_version);
t38_terminal_set_config(t38_state, options);
t38_terminal_set_tep_mode(t38_state, use_tep);
logging = t38_terminal_get_logging_state(t38_state);
span_log_set_level(logging, SPAN_LOG_DEBUG | SPAN_LOG_SHOW_TAG | SPAN_LOG_SHOW_SAMPLE_TIME);
span_log_set_tag(logging, "T.38");
logging = t38_core_get_logging_state(t38_core);
span_log_set_level(logging, SPAN_LOG_DEBUG | SPAN_LOG_SHOW_TAG | SPAN_LOG_SHOW_SAMPLE_TIME);
span_log_set_tag(logging, "T.38");
logging = t30_get_logging_state(t30);
span_log_set_level(logging, SPAN_LOG_DEBUG | SPAN_LOG_SHOW_TAG | SPAN_LOG_SHOW_SAMPLE_TIME);
span_log_set_tag(logging, "T.38");
t30_set_supported_modems(t30, supported_modems);
t30_set_tx_ident(t30, "11111111");
t30_set_tx_nsf(t30, (const uint8_t *) "\x50\x00\x00\x00Spandsp\x00", 12);
t30_set_rx_file(t30, OUTPUT_FILE_NAME, -1);
t30_set_phase_b_handler(t30, phase_b_handler, (void *) (intptr_t) 'A');
t30_set_phase_d_handler(t30, phase_d_handler, (void *) (intptr_t) 'A');
t30_set_phase_e_handler(t30, phase_e_handler, (void *) (intptr_t) 'A');
t30_set_ecm_capability(t30, TRUE);
t30_set_supported_compressions(t30, T30_SUPPORT_T4_1D_COMPRESSION | T30_SUPPORT_T4_2D_COMPRESSION | T30_SUPPORT_T6_COMPRESSION | T30_SUPPORT_T85_COMPRESSION);
if (pcap_scan_pkts(input_file_name, src_addr, src_port, dest_addr, dest_port, timing_update, process_packet, NULL))
exit(2);
/* Push the time along, to flush out any remaining activity from the application. */
now.tv_sec += 60;
timing_update(NULL, &now);
}
/*- End of function --------------------------------------------------------*/
/*- End of file ------------------------------------------------------------*/
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