forked from Mirrors/freeswitch
588 lines
20 KiB
C
588 lines
20 KiB
C
/*
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* SpanDSP - a series of DSP components for telephony
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*
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* t38_decode.c
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*
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* Written by Steve Underwood <steveu@coppice.org>
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*
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* Copyright (C) 2010 Steve Underwood
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*
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2, as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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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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/*! \file */
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#if defined(HAVE_CONFIG_H)
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#include "config.h"
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#endif
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#include <stdlib.h>
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#include <inttypes.h>
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#include <stdio.h>
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#include <fcntl.h>
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#include <string.h>
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#include <assert.h>
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#include <errno.h>
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#include <time.h>
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#if !defined(_WIN32)
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#include <unistd.h>
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#endif
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#include "udptl.h"
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#include "spandsp.h"
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#include "spandsp-sim.h"
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#include "fax_utils.h"
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#include "pcap_parse.h"
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#define INPUT_FILE_NAME "t38.pcap"
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#define INPUT_TIFF_FILE_NAME "../test-data/itu/fax/itutests.tif"
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#define OUTPUT_TIFF_FILE_NAME "t38pcap.tif"
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#define OUTPUT_WAVE_FILE_NAME "t38_decode2.wav"
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#define SAMPLES_PER_CHUNK 160
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static t38_core_state_t *t38_core;
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static t38_terminal_state_t *t38_terminal_state;
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static t38_gateway_state_t *t38_gateway_state;
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static fax_state_t *fax_state;
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static struct timeval now;
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static SNDFILE *wave_handle;
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static int log_audio;
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static int use_transmit_on_idle;
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static int done = false;
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static int started = false;
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static int64_t current = 0;
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static int phase_b_handler(t30_state_t *s, void *user_data, int result)
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{
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int i;
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char tag[20];
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i = (int) (intptr_t) user_data;
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snprintf(tag, sizeof(tag), "%c: Phase B", i);
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printf("%c: Phase B handler on channel %c - (0x%X) %s\n", i, i, result, t30_frametype(result));
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fax_log_rx_parameters(s, tag);
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return T30_ERR_OK;
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}
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/*- End of function --------------------------------------------------------*/
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static int phase_d_handler(t30_state_t *s, void *user_data, int result)
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{
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int i;
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char tag[20];
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i = (int) (intptr_t) user_data;
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snprintf(tag, sizeof(tag), "%c: Phase D", i);
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printf("%c: Phase D handler on channel %c - (0x%X) %s\n", i, i, result, t30_frametype(result));
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fax_log_page_transfer_statistics(s, tag);
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fax_log_tx_parameters(s, tag);
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fax_log_rx_parameters(s, tag);
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return T30_ERR_OK;
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}
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/*- End of function --------------------------------------------------------*/
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static void phase_e_handler(t30_state_t *s, void *user_data, int result)
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{
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int i;
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t30_stats_t t;
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char tag[20];
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i = (int) (intptr_t) user_data;
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snprintf(tag, sizeof(tag), "%c: Phase E", i);
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printf("%c: Phase E handler on channel %c - (%d) %s\n", i, i, result, t30_completion_code_to_str(result));
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fax_log_final_transfer_statistics(s, tag);
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fax_log_tx_parameters(s, tag);
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fax_log_rx_parameters(s, tag);
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t30_get_transfer_statistics(s, &t);
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}
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/*- End of function --------------------------------------------------------*/
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static int tx_packet_handler(t38_core_state_t *s, void *user_data, const uint8_t *buf, int len, int count)
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{
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return 0;
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}
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/*- End of function --------------------------------------------------------*/
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static int t38_terminal_timing_update(void *user_data, struct timeval *ts)
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{
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t30_state_t *t30;
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logging_state_t *logging;
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int samples;
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int partial;
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int64_t when;
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int64_t diff;
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memcpy(&now, ts, sizeof(now));
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when = ts->tv_sec*1000000LL + ts->tv_usec;
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if (current == 0)
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{
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if (started)
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current = when;
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return 0;
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}
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diff = when - current;
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samples = diff/125LL;
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while (samples > 0)
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{
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partial = (samples > SAMPLES_PER_CHUNK) ? SAMPLES_PER_CHUNK : samples;
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//fprintf(stderr, "Update time by %d samples\n", partial);
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logging = t38_terminal_get_logging_state(t38_terminal_state);
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span_log_bump_samples(logging, partial);
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logging = t38_core_get_logging_state(t38_core);
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span_log_bump_samples(logging, partial);
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t30 = t38_terminal_get_t30_state(t38_terminal_state);
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logging = t30_get_logging_state(t30);
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span_log_bump_samples(logging, partial);
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t38_terminal_send_timeout(t38_terminal_state, partial);
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current = when;
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samples -= partial;
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}
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return 0;
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}
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/*- End of function --------------------------------------------------------*/
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static int t38_gateway_timing_update(void *user_data, struct timeval *ts)
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{
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t30_state_t *t30;
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logging_state_t *logging;
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int samples;
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int partial;
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int64_t when;
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int64_t diff;
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int16_t t38_amp[SAMPLES_PER_CHUNK];
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int16_t t30_amp[SAMPLES_PER_CHUNK];
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int16_t out_amp[2*SAMPLES_PER_CHUNK];
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int t38_len;
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int t30_len;
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int outframes;
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int i;
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memcpy(&now, ts, sizeof(now));
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when = ts->tv_sec*1000000LL + ts->tv_usec;
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if (current == 0)
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{
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if (started)
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current = when;
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return 0;
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}
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diff = when - current;
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samples = diff/125LL;
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while (samples > 0)
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{
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partial = (samples > SAMPLES_PER_CHUNK) ? SAMPLES_PER_CHUNK : samples;
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//fprintf(stderr, "Update time by %d samples\n", partial);
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logging = t38_gateway_get_logging_state(t38_gateway_state);
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span_log_bump_samples(logging, partial);
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logging = t38_core_get_logging_state(t38_core);
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span_log_bump_samples(logging, partial);
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logging = fax_get_logging_state(fax_state);
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span_log_bump_samples(logging, partial);
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t30 = fax_get_t30_state(fax_state);
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logging = t30_get_logging_state(t30);
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span_log_bump_samples(logging, partial);
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memset(out_amp, 0, sizeof(out_amp));
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t30_len = fax_tx(fax_state, t30_amp, partial);
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if (!use_transmit_on_idle)
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{
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/* The receive side always expects a full block of samples, but the
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transmit side may not be sending any when it doesn't need to. We
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may need to pad with some silence. */
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if (t30_len < partial)
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{
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memset(t30_amp + t30_len, 0, sizeof(int16_t)*(partial - t30_len));
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t30_len = partial;
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}
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}
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if (log_audio)
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{
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for (i = 0; i < t30_len; i++)
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out_amp[2*i + 1] = t30_amp[i];
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}
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if (t38_gateway_rx(t38_gateway_state, t30_amp, t30_len))
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break;
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t38_len = t38_gateway_tx(t38_gateway_state, t38_amp, partial);
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if (!use_transmit_on_idle)
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{
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if (t38_len < partial)
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{
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memset(t38_amp + t38_len, 0, sizeof(int16_t)*(partial - t38_len));
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t38_len = partial;
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}
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}
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if (log_audio)
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{
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for (i = 0; i < t38_len; i++)
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out_amp[2*i] = t38_amp[i];
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}
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if (fax_rx(fax_state, t38_amp, partial))
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break;
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if (log_audio)
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{
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outframes = sf_writef_short(wave_handle, out_amp, partial);
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if (outframes != partial)
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break;
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}
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if (done)
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break;
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current = when;
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samples -= partial;
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}
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return 0;
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}
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/*- End of function --------------------------------------------------------*/
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static int ifp_handler(void *user_data, const uint8_t msg[], int len, int seq_no)
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{
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int i;
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started = true;
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printf("%5d >>> ", seq_no);
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for (i = 0; i < len; i++)
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printf("%02X ", msg[i]);
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printf("\n");
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t38_core_rx_ifp_packet(t38_core, msg, len, seq_no);
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return 0;
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}
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/*- End of function --------------------------------------------------------*/
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static int process_packet(void *user_data, const uint8_t *pkt, int len)
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{
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static udptl_state_t *state = NULL;
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if (state == NULL)
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state = udptl_init(NULL, UDPTL_ERROR_CORRECTION_REDUNDANCY, 3, 3, ifp_handler, NULL);
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udptl_rx_packet(state, pkt, len);
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return 0;
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}
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/*- End of function --------------------------------------------------------*/
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static uint32_t parse_inet_addr(const char *s)
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{
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int i;
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uint32_t a;
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uint32_t b;
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uint32_t c;
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uint32_t d;
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a = 0;
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b = 0;
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c = 0;
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d = 0;
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i = sscanf(s, "%" PRIu32 ".%" PRIu32 ".%" PRIu32 ".%" PRIu32, &a, &b, &c, &d);
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switch (i)
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{
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case 4:
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c = (c << 8) | d;
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case 3:
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b = (b << 16) | c;
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case 2:
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a = (a << 24) | b;
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}
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return a;
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}
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/*- End of function --------------------------------------------------------*/
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int main(int argc, char *argv[])
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{
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t30_state_t *t30;
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logging_state_t *logging;
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const char *input_file_name;
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int t38_version;
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int caller;
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int use_ecm;
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int use_tep;
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int options;
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int supported_modems;
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int fill_removal;
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int opt;
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int t38_terminal_operation;
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uint32_t src_addr;
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uint16_t src_port;
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uint32_t dest_addr;
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uint16_t dest_port;
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caller = false;
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use_ecm = false;
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t38_version = 0;
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options = 0;
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input_file_name = INPUT_FILE_NAME;
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fill_removal = false;
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use_tep = false;
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use_transmit_on_idle = true;
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supported_modems = T30_SUPPORT_V27TER | T30_SUPPORT_V29 | T30_SUPPORT_V17;
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t38_terminal_operation = true;
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log_audio = false;
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src_addr = 0;
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src_port = 0;
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dest_addr = 0;
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dest_port = 0;
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while ((opt = getopt(argc, argv, "cD:d:eFGi:lm:oS:s:tv:")) != -1)
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{
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switch (opt)
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{
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case 'c':
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caller = true;
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break;
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case 'D':
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dest_addr = parse_inet_addr(optarg);
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break;
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case 'd':
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dest_port = atoi(optarg);
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break;
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case 'e':
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use_ecm = true;
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break;
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case 'F':
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fill_removal = true;
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break;
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case 'G':
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t38_terminal_operation = false;
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break;
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case 'i':
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input_file_name = optarg;
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break;
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case 'l':
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log_audio = true;
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break;
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case 'm':
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supported_modems = atoi(optarg);
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break;
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case 'o':
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options = atoi(optarg);
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break;
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case 'S':
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src_addr = parse_inet_addr(optarg);
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break;
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case 's':
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src_port = atoi(optarg);
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break;
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case 't':
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use_tep = true;
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break;
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case 'v':
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t38_version = atoi(optarg);
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break;
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default:
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//usage();
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exit(2);
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break;
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}
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}
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printf("Using T.38 version %d\n", t38_version);
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if (t38_terminal_operation)
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{
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if ((t38_terminal_state = t38_terminal_init(NULL, caller, tx_packet_handler, NULL)) == NULL)
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{
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fprintf(stderr, "Cannot start the T.38 channel\n");
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exit(2);
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}
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t30 = t38_terminal_get_t30_state(t38_terminal_state);
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t38_core = t38_terminal_get_t38_core_state(t38_terminal_state);
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t38_set_t38_version(t38_core, t38_version);
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t38_terminal_set_config(t38_terminal_state, options);
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t38_terminal_set_tep_mode(t38_terminal_state, use_tep);
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t38_terminal_set_fill_bit_removal(t38_terminal_state, fill_removal);
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logging = t38_terminal_get_logging_state(t38_terminal_state);
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span_log_set_level(logging, SPAN_LOG_DEBUG | SPAN_LOG_SHOW_TAG | SPAN_LOG_SHOW_SAMPLE_TIME);
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span_log_set_tag(logging, "T.38");
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logging = t38_core_get_logging_state(t38_core);
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span_log_set_level(logging, SPAN_LOG_DEBUG | SPAN_LOG_SHOW_TAG | SPAN_LOG_SHOW_SAMPLE_TIME);
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span_log_set_tag(logging, "T.38");
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logging = t30_get_logging_state(t30);
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span_log_set_level(logging, SPAN_LOG_DEBUG | SPAN_LOG_SHOW_TAG | SPAN_LOG_SHOW_SAMPLE_TIME);
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span_log_set_tag(logging, "T.38");
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t30_set_supported_modems(t30, supported_modems);
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t30_set_tx_ident(t30, "11111111");
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t30_set_tx_nsf(t30, (const uint8_t *) "\x50\x00\x00\x00Spandsp\x00", 12);
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if (caller)
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t30_set_tx_file(t30, INPUT_TIFF_FILE_NAME, -1, -1);
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else
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t30_set_rx_file(t30, OUTPUT_TIFF_FILE_NAME, -1);
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t30_set_phase_b_handler(t30, phase_b_handler, (void *) (intptr_t) 'A');
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t30_set_phase_d_handler(t30, phase_d_handler, (void *) (intptr_t) 'A');
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t30_set_phase_e_handler(t30, phase_e_handler, (void *) (intptr_t) 'A');
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t30_set_ecm_capability(t30, use_ecm);
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t30_set_supported_compressions(t30,
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T4_COMPRESSION_T4_1D
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| T4_COMPRESSION_T4_2D
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| T4_COMPRESSION_T6
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| T4_COMPRESSION_T85
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| T4_COMPRESSION_T85_L0
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| T4_COMPRESSION_T42_T81
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| T4_COMPRESSION_COLOUR);
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t30_set_supported_bilevel_resolutions(t30,
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T4_RESOLUTION_R8_STANDARD
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| T4_RESOLUTION_R8_FINE
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| T4_RESOLUTION_R8_SUPERFINE
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| T4_RESOLUTION_R16_SUPERFINE
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| T4_RESOLUTION_200_100
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| T4_RESOLUTION_200_200
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| T4_RESOLUTION_200_400
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| T4_RESOLUTION_300_300
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| T4_RESOLUTION_300_600
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| T4_RESOLUTION_400_400
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| T4_RESOLUTION_400_800
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| T4_RESOLUTION_600_600
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| T4_RESOLUTION_600_1200
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| T4_RESOLUTION_1200_1200);
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t30_set_supported_colour_resolutions(t30,
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T4_RESOLUTION_100_100
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| T4_RESOLUTION_200_200
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| T4_RESOLUTION_300_300
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| T4_RESOLUTION_400_400
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| T4_RESOLUTION_600_600
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| T4_RESOLUTION_1200_1200);
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if (pcap_scan_pkts(input_file_name, src_addr, src_port, dest_addr, dest_port, t38_terminal_timing_update, process_packet, NULL))
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exit(2);
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/* Push the time along, to flush out any remaining activity from the application. */
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now.tv_sec += 60;
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t38_terminal_timing_update(NULL, &now);
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}
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else
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{
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wave_handle = NULL;
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if (log_audio)
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{
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if ((wave_handle = sf_open_telephony_write(OUTPUT_WAVE_FILE_NAME, 2)) == NULL)
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{
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fprintf(stderr, " Cannot create audio file '%s'\n", OUTPUT_WAVE_FILE_NAME);
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exit(2);
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}
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}
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if ((t38_gateway_state = t38_gateway_init(NULL, tx_packet_handler, NULL)) == NULL)
|
|
{
|
|
fprintf(stderr, "Cannot start the T.38 channel\n");
|
|
exit(2);
|
|
}
|
|
t38_core = t38_gateway_get_t38_core_state(t38_gateway_state);
|
|
t38_gateway_set_transmit_on_idle(t38_gateway_state, use_transmit_on_idle);
|
|
t38_set_t38_version(t38_core, t38_version);
|
|
t38_gateway_set_ecm_capability(t38_gateway_state, use_ecm);
|
|
|
|
logging = t38_gateway_get_logging_state(t38_gateway_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");
|
|
|
|
if ((fax_state = fax_init(NULL, caller)) == NULL)
|
|
{
|
|
fprintf(stderr, "Cannot start FAX\n");
|
|
exit(2);
|
|
}
|
|
t30 = fax_get_t30_state(fax_state);
|
|
fax_set_transmit_on_idle(fax_state, use_transmit_on_idle);
|
|
fax_set_tep_mode(fax_state, use_tep);
|
|
t30_set_supported_modems(t30, supported_modems);
|
|
t30_set_tx_ident(t30, "22222222");
|
|
t30_set_tx_nsf(t30, (const uint8_t *) "\x50\x00\x00\x00Spandsp\x00", 12);
|
|
if (caller)
|
|
t30_set_tx_file(t30, INPUT_TIFF_FILE_NAME, -1, -1);
|
|
else
|
|
t30_set_rx_file(t30, OUTPUT_TIFF_FILE_NAME, -1);
|
|
t30_set_phase_b_handler(t30, phase_b_handler, (void *) (intptr_t) 'B');
|
|
t30_set_phase_d_handler(t30, phase_d_handler, (void *) (intptr_t) 'B');
|
|
t30_set_phase_e_handler(t30, phase_e_handler, (void *) (intptr_t) 'B');
|
|
t30_set_ecm_capability(t30, use_ecm);
|
|
t30_set_supported_compressions(t30,
|
|
T4_COMPRESSION_T4_1D
|
|
| T4_COMPRESSION_T4_2D
|
|
| T4_COMPRESSION_T6
|
|
| T4_COMPRESSION_T85
|
|
| T4_COMPRESSION_T85_L0
|
|
| T4_COMPRESSION_T42_T81
|
|
| T4_COMPRESSION_COLOUR);
|
|
t30_set_supported_bilevel_resolutions(t30,
|
|
T4_RESOLUTION_R8_STANDARD
|
|
| T4_RESOLUTION_R8_FINE
|
|
| T4_RESOLUTION_R8_SUPERFINE
|
|
| T4_RESOLUTION_R16_SUPERFINE
|
|
| T4_RESOLUTION_200_100
|
|
| T4_RESOLUTION_200_200
|
|
| T4_RESOLUTION_200_400
|
|
| T4_RESOLUTION_300_300
|
|
| T4_RESOLUTION_300_600
|
|
| T4_RESOLUTION_400_400
|
|
| T4_RESOLUTION_400_800
|
|
| T4_RESOLUTION_600_600
|
|
| T4_RESOLUTION_600_1200
|
|
| T4_RESOLUTION_1200_1200);
|
|
t30_set_supported_colour_resolutions(t30,
|
|
T4_RESOLUTION_100_100
|
|
| T4_RESOLUTION_200_200
|
|
| T4_RESOLUTION_300_300
|
|
| T4_RESOLUTION_400_400
|
|
| T4_RESOLUTION_600_600
|
|
| T4_RESOLUTION_1200_1200);
|
|
|
|
logging = fax_get_logging_state(fax_state);
|
|
span_log_set_level(logging, SPAN_LOG_DEBUG | SPAN_LOG_SHOW_TAG | SPAN_LOG_SHOW_SAMPLE_TIME);
|
|
span_log_set_tag(logging, "FAX ");
|
|
|
|
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, "FAX ");
|
|
|
|
if (pcap_scan_pkts(input_file_name, src_addr, src_port, dest_addr, dest_port, t38_gateway_timing_update, process_packet, NULL))
|
|
exit(2);
|
|
/* Push the time along, to flush out any remaining activity from the application. */
|
|
now.tv_sec += 60;
|
|
t38_gateway_timing_update(NULL, &now);
|
|
|
|
fax_release(fax_state);
|
|
t38_gateway_release(t38_gateway_state);
|
|
if (log_audio)
|
|
{
|
|
if (sf_close_telephony(wave_handle))
|
|
{
|
|
fprintf(stderr, " Cannot close audio file '%s'\n", OUTPUT_WAVE_FILE_NAME);
|
|
exit(2);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
/*- End of function --------------------------------------------------------*/
|
|
/*- End of file ------------------------------------------------------------*/
|