static int transmit_audio(fax_session *s) { int res = -1; struct ast_format original_read_fmt; struct ast_format original_write_fmt; fax_state_t fax; t30_state_t *t30state; struct ast_frame *inf = NULL; int last_state = 0; struct timeval now, start, state_change; enum ast_t38_state t38_state; struct ast_control_t38_parameters t38_parameters = { .version = 0, .max_ifp = 800, .rate = AST_T38_RATE_14400, .rate_management = AST_T38_RATE_MANAGEMENT_TRANSFERRED_TCF, .fill_bit_removal = 1, /* * spandsp has API calls to support MMR and JBIG transcoding, but they aren't * implemented quite yet... so don't offer them to the remote endpoint * .transcoding_mmr = 1, * .transcoding_jbig = 1, */ }; ast_format_clear(&original_read_fmt); ast_format_clear(&original_write_fmt); /* if in called party mode, try to use T.38 */ if (s->caller_mode == FALSE) { /* check if we are already in T.38 mode (unlikely), or if we can request * a switch... if so, request it now and wait for the result, rather * than starting an audio FAX session that will have to be cancelled */ if ((t38_state = ast_channel_get_t38_state(s->chan)) == T38_STATE_NEGOTIATED) { return 1; } else if ((t38_state != T38_STATE_UNAVAILABLE) && (t38_parameters.request_response = AST_T38_REQUEST_NEGOTIATE, (ast_indicate_data(s->chan, AST_CONTROL_T38_PARAMETERS, &t38_parameters, sizeof(t38_parameters)) == 0))) { /* wait up to five seconds for negotiation to complete */ unsigned int timeout = 5000; int ms; ast_debug(1, "Negotiating T.38 for receive on %s\n", ast_channel_name(s->chan)); while (timeout > 0) { ms = ast_waitfor(s->chan, 1000); if (ms < 0) { ast_log(LOG_WARNING, "something bad happened while channel '%s' was polling.\n", ast_channel_name(s->chan)); return -1; } if (!ms) { /* nothing happened */ if (timeout > 0) { timeout -= 1000; continue; } else { ast_log(LOG_WARNING, "channel '%s' timed-out during the T.38 negotiation.\n", ast_channel_name(s->chan)); break; } } if (!(inf = ast_read(s->chan))) { return -1; } if ((inf->frametype == AST_FRAME_CONTROL) && (inf->subclass.integer == AST_CONTROL_T38_PARAMETERS) && (inf->datalen == sizeof(t38_parameters))) { struct ast_control_t38_parameters *parameters = inf->data.ptr; switch (parameters->request_response) { case AST_T38_NEGOTIATED: ast_debug(1, "Negotiated T.38 for receive on %s\n", ast_channel_name(s->chan)); res = 1; break; case AST_T38_REFUSED: ast_log(LOG_WARNING, "channel '%s' refused to negotiate T.38\n", ast_channel_name(s->chan)); break; default: ast_log(LOG_ERROR, "channel '%s' failed to negotiate T.38\n", ast_channel_name(s->chan)); break; } ast_frfree(inf); if (res == 1) { return 1; } else { break; } } ast_frfree(inf); } } } #if SPANDSP_RELEASE_DATE >= 20080725 /* for spandsp shaphots 0.0.6 and higher */ t30state = &fax.t30; #else /* for spandsp release 0.0.5 */ t30state = &fax.t30_state; #endif ast_format_copy(&original_read_fmt, ast_channel_readformat(s->chan)); if (original_read_fmt.id != AST_FORMAT_SLINEAR) { res = ast_set_read_format_by_id(s->chan, AST_FORMAT_SLINEAR); if (res < 0) { ast_log(LOG_WARNING, "Unable to set to linear read mode, giving up\n"); goto done; } } ast_format_copy(&original_write_fmt, ast_channel_writeformat(s->chan)); if (original_write_fmt.id != AST_FORMAT_SLINEAR) { res = ast_set_write_format_by_id(s->chan, AST_FORMAT_SLINEAR); if (res < 0) { ast_log(LOG_WARNING, "Unable to set to linear write mode, giving up\n"); goto done; } } /* Initialize T30 terminal */ fax_init(&fax, s->caller_mode); /* Setup logging */ set_logging(&fax.logging); set_logging(&t30state->logging); /* Configure terminal */ set_local_info(t30state, s); set_file(t30state, s); set_ecm(t30state, TRUE); fax_set_transmit_on_idle(&fax, TRUE); t30_set_phase_e_handler(t30state, phase_e_handler, s); start = state_change = ast_tvnow(); ast_activate_generator(s->chan, &generator, &fax); while (!s->finished) { inf = NULL; if ((res = ast_waitfor(s->chan, 25)) < 0) { ast_debug(1, "Error waiting for a frame\n"); break; } /* Watchdog */ now = ast_tvnow(); if (ast_tvdiff_sec(now, start) > WATCHDOG_TOTAL_TIMEOUT || ast_tvdiff_sec(now, state_change) > WATCHDOG_STATE_TIMEOUT) { ast_log(LOG_WARNING, "It looks like we hung. Aborting.\n"); res = -1; break; } if (!res) { /* There was timeout waiting for a frame. Loop around and wait again */ continue; } /* There is a frame available. Get it */ res = 0; if (!(inf = ast_read(s->chan))) { ast_debug(1, "Channel hangup\n"); res = -1; break; } ast_debug(10, "frame %d/%u, len=%d\n", inf->frametype, (unsigned int) inf->subclass.format.id, inf->datalen); /* Check the frame type. Format also must be checked because there is a chance that a frame in old format was already queued before we set channel format to slinear so it will still be received by ast_read */ if (inf->frametype == AST_FRAME_VOICE && inf->subclass.format.id == AST_FORMAT_SLINEAR) { if (fax_rx(&fax, inf->data.ptr, inf->samples) < 0) { /* I know fax_rx never returns errors. The check here is for good style only */ ast_log(LOG_WARNING, "fax_rx returned error\n"); res = -1; break; } if (last_state != t30state->state) { state_change = ast_tvnow(); last_state = t30state->state; } } else if ((inf->frametype == AST_FRAME_CONTROL) && (inf->subclass.integer == AST_CONTROL_T38_PARAMETERS)) { struct ast_control_t38_parameters *parameters = inf->data.ptr; if (parameters->request_response == AST_T38_NEGOTIATED) { /* T38 switchover completed */ s->t38parameters = *parameters; ast_debug(1, "T38 negotiated, finishing audio loop\n"); res = 1; break; } else if (parameters->request_response == AST_T38_REQUEST_NEGOTIATE) { t38_parameters.request_response = AST_T38_NEGOTIATED; ast_debug(1, "T38 request received, accepting\n"); /* Complete T38 switchover */ ast_indicate_data(s->chan, AST_CONTROL_T38_PARAMETERS, &t38_parameters, sizeof(t38_parameters)); /* Do not break audio loop, wait until channel driver finally acks switchover * with AST_T38_NEGOTIATED */ } } ast_frfree(inf); inf = NULL; } ast_debug(1, "Loop finished, res=%d\n", res); if (inf) ast_frfree(inf); ast_deactivate_generator(s->chan); /* If we are switching to T38, remove phase E handler. Otherwise it will be executed by t30_terminate, display diagnostics and set status variables although no transmittion has taken place yet. */ if (res > 0) { t30_set_phase_e_handler(t30state, NULL, NULL); } t30_terminate(t30state); fax_release(&fax); done: if (original_write_fmt.id != AST_FORMAT_SLINEAR) { if (ast_set_write_format(s->chan, &original_write_fmt) < 0) ast_log(LOG_WARNING, "Unable to restore write format on '%s'\n", ast_channel_name(s->chan)); } if (original_read_fmt.id != AST_FORMAT_SLINEAR) { if (ast_set_read_format(s->chan, &original_read_fmt) < 0) ast_log(LOG_WARNING, "Unable to restore read format on '%s'\n", ast_channel_name(s->chan)); } return res; } static int transmit_t38(fax_session *s) { int res = 0; t38_terminal_state_t t38; struct ast_frame *inf = NULL; int last_state = 0; struct timeval now, start, state_change, last_frame; t30_state_t *t30state; t38_core_state_t *t38state; #if SPANDSP_RELEASE_DATE >= 20080725 /* for spandsp shaphots 0.0.6 and higher */ t30state = &t38.t30; t38state = &t38.t38_fe.t38; #else /* for spandsp releases 0.0.5 */ t30state = &t38.t30_state; t38state = &t38.t38; #endif /* Initialize terminal */ memset(&t38, 0, sizeof(t38)); if (t38_terminal_init(&t38, s->caller_mode, t38_tx_packet_handler, s->chan) == NULL) { ast_log(LOG_WARNING, "Unable to start T.38 termination.\n"); res = -1; goto disable_t38; } t38_set_max_datagram_size(t38state, s->t38parameters.max_ifp); if (s->t38parameters.fill_bit_removal) { t38_set_fill_bit_removal(t38state, TRUE); } if (s->t38parameters.transcoding_mmr) { t38_set_mmr_transcoding(t38state, TRUE); } if (s->t38parameters.transcoding_jbig) { t38_set_jbig_transcoding(t38state, TRUE); } /* Setup logging */ set_logging(&t38.logging); set_logging(&t30state->logging); set_logging(&t38state->logging); /* Configure terminal */ set_local_info(t30state, s); set_file(t30state, s); set_ecm(t30state, TRUE); t30_set_phase_e_handler(t30state, phase_e_handler, s); now = start = state_change = ast_tvnow(); while (!s->finished) { inf = NULL; if ((res = ast_waitfor(s->chan, 25)) < 0) { ast_debug(1, "Error waiting for a frame\n"); break; } last_frame = now; /* Watchdog */ now = ast_tvnow(); if (ast_tvdiff_sec(now, start) > WATCHDOG_TOTAL_TIMEOUT || ast_tvdiff_sec(now, state_change) > WATCHDOG_STATE_TIMEOUT) { ast_log(LOG_WARNING, "It looks like we hung. Aborting.\n"); res = -1; break; } t38_terminal_send_timeout(&t38, ast_tvdiff_us(now, last_frame) / (1000000 / 8000)); if (!res) { /* There was timeout waiting for a frame. Loop around and wait again */ continue; } /* There is a frame available. Get it */ res = 0; if (!(inf = ast_read(s->chan))) { ast_debug(1, "Channel hangup\n"); res = -1; break; } ast_debug(10, "frame %d/%d, len=%d\n", inf->frametype, inf->subclass.integer, inf->datalen); if (inf->frametype == AST_FRAME_MODEM && inf->subclass.integer == AST_MODEM_T38) { t38_core_rx_ifp_packet(t38state, inf->data.ptr, inf->datalen, inf->seqno); if (last_state != t30state->state) { state_change = ast_tvnow(); last_state = t30state->state; } } else if (inf->frametype == AST_FRAME_CONTROL && inf->subclass.integer == AST_CONTROL_T38_PARAMETERS) { struct ast_control_t38_parameters *parameters = inf->data.ptr; if (parameters->request_response == AST_T38_TERMINATED) { ast_debug(1, "T38 down, finishing\n"); break; } } ast_frfree(inf); inf = NULL; } ast_debug(1, "Loop finished, res=%d\n", res); if (inf) ast_frfree(inf); t30_terminate(t30state); t38_terminal_release(&t38); disable_t38: /* if we are not the caller, it's our job to shut down the T.38 * session when the FAX transmisson is complete. */ if ((s->caller_mode == FALSE) && (ast_channel_get_t38_state(s->chan) == T38_STATE_NEGOTIATED)) { struct ast_control_t38_parameters t38_parameters = { .request_response = AST_T38_REQUEST_TERMINATE, }; if (ast_indicate_data(s->chan, AST_CONTROL_T38_PARAMETERS, &t38_parameters, sizeof(t38_parameters)) == 0) { /* wait up to five seconds for negotiation to complete */ unsigned int timeout = 5000; int ms; ast_debug(1, "Shutting down T.38 on %s\n", ast_channel_name(s->chan)); while (timeout > 0) { ms = ast_waitfor(s->chan, 1000); if (ms < 0) { ast_log(LOG_WARNING, "something bad happened while channel '%s' was polling.\n", ast_channel_name(s->chan)); return -1; } if (!ms) { /* nothing happened */ if (timeout > 0) { timeout -= 1000; continue; } else { ast_log(LOG_WARNING, "channel '%s' timed-out during the T.38 shutdown.\n", ast_channel_name(s->chan)); break; } } if (!(inf = ast_read(s->chan))) { return -1; } if ((inf->frametype == AST_FRAME_CONTROL) && (inf->subclass.integer == AST_CONTROL_T38_PARAMETERS) && (inf->datalen == sizeof(t38_parameters))) { struct ast_control_t38_parameters *parameters = inf->data.ptr; switch (parameters->request_response) { case AST_T38_TERMINATED: ast_debug(1, "Shut down T.38 on %s\n", ast_channel_name(s->chan)); break; case AST_T38_REFUSED: ast_log(LOG_WARNING, "channel '%s' refused to disable T.38\n", ast_channel_name(s->chan)); break; default: ast_log(LOG_ERROR, "channel '%s' failed to disable T.38\n", ast_channel_name(s->chan)); break; } ast_frfree(inf); break; } ast_frfree(inf); } } } return res; }
int main(int argc, char *argv[]) { int16_t silence[SAMPLES_PER_CHUNK]; int16_t t30_amp_a[SAMPLES_PER_CHUNK]; int16_t t38_amp_a[SAMPLES_PER_CHUNK]; int16_t t38_amp_b[SAMPLES_PER_CHUNK]; int16_t t30_amp_b[SAMPLES_PER_CHUNK]; int16_t out_amp[SAMPLES_PER_CHUNK*4]; int t30_len_a; int t38_len_a; int t38_len_b; int t30_len_b; int log_audio; int msg_len; uint8_t msg[1024]; int outframes; AFfilesetup filesetup; AFfilehandle wave_handle; int use_ecm; int use_tep; int use_transmit_on_idle; int t38_version; const char *input_file_name; int i; int seq_no; int model_no; int speed_pattern_no; double tx_when; double rx_when; int use_gui; int opt; log_audio = FALSE; use_ecm = FALSE; t38_version = 1; input_file_name = INPUT_FILE_NAME; simulate_incrementing_repeats = FALSE; model_no = 0; speed_pattern_no = 1; use_gui = FALSE; use_tep = FALSE; use_transmit_on_idle = TRUE; while ((opt = getopt(argc, argv, "egi:Ilm:s:tv:")) != -1) { switch (opt) { case 'e': use_ecm = TRUE; break; case 'g': use_gui = TRUE; break; case 'i': input_file_name = optarg; break; case 'I': simulate_incrementing_repeats = TRUE; break; case 'l': log_audio = TRUE; break; case 'm': model_no = optarg[0] - 'A' + 1; break; case 's': speed_pattern_no = atoi(optarg); break; case 't': use_tep = TRUE; break; case 'v': t38_version = atoi(optarg); break; } } printf("Using T.38 version %d\n", t38_version); if (use_ecm) printf("Using ECM\n"); filesetup = AF_NULL_FILESETUP; wave_handle = AF_NULL_FILEHANDLE; if (log_audio) { if ((filesetup = afNewFileSetup()) == AF_NULL_FILESETUP) { fprintf(stderr, " Failed to create file setup\n"); exit(2); } afInitSampleFormat(filesetup, AF_DEFAULT_TRACK, AF_SAMPFMT_TWOSCOMP, 16); afInitRate(filesetup, AF_DEFAULT_TRACK, (float) SAMPLE_RATE); afInitFileFormat(filesetup, AF_FILE_WAVE); afInitChannels(filesetup, AF_DEFAULT_TRACK, 4); if ((wave_handle = afOpenFile(OUTPUT_FILE_NAME_WAVE, "w", filesetup)) == AF_NULL_FILEHANDLE) { fprintf(stderr, " Cannot create wave file '%s'\n", OUTPUT_FILE_NAME_WAVE); exit(2); } } memset(silence, 0, sizeof(silence)); srand48(0x1234567); if ((path_a_to_b = g1050_init(model_no, speed_pattern_no, 100, 33)) == NULL) { fprintf(stderr, "Failed to start IP network path model\n"); exit(2); } if ((path_b_to_a = g1050_init(model_no, speed_pattern_no, 100, 33)) == NULL) { fprintf(stderr, "Failed to start IP network path model\n"); exit(2); } if (fax_init(&fax_state_a, TRUE) == NULL) { fprintf(stderr, "Cannot start FAX\n"); exit(2); } fax_set_transmit_on_idle(&fax_state_a, use_transmit_on_idle); fax_set_tep_mode(&fax_state_a, use_tep); //t30_set_supported_modems(&(fax_state_a.t30_state), T30_SUPPORT_V27TER | T30_SUPPORT_V29); t30_set_local_ident(&fax_state_a.t30_state, "11111111"); t30_set_tx_file(&fax_state_a.t30_state, input_file_name, -1, -1); t30_set_phase_b_handler(&fax_state_a.t30_state, phase_b_handler, (void *) (intptr_t) 'A'); t30_set_phase_d_handler(&fax_state_a.t30_state, phase_d_handler, (void *) (intptr_t) 'A'); t30_set_phase_e_handler(&fax_state_a.t30_state, phase_e_handler, (void *) (intptr_t) 'A'); t30_set_local_nsf(&fax_state_a.t30_state, (const uint8_t *) "\x50\x00\x00\x00Spandsp\x00", 12); t30_set_ecm_capability(&fax_state_a.t30_state, use_ecm); if (use_ecm) t30_set_supported_compressions(&fax_state_a.t30_state, T30_SUPPORT_T4_1D_COMPRESSION | T30_SUPPORT_T4_2D_COMPRESSION | T30_SUPPORT_T6_COMPRESSION); span_log_set_level(&fax_state_a.logging, SPAN_LOG_DEBUG | SPAN_LOG_SHOW_TAG | SPAN_LOG_SHOW_SAMPLE_TIME); span_log_set_tag(&fax_state_a.logging, "FAX-A "); span_log_set_level(&fax_state_a.t30_state.logging, SPAN_LOG_DEBUG | SPAN_LOG_SHOW_TAG | SPAN_LOG_SHOW_SAMPLE_TIME); span_log_set_tag(&fax_state_a.t30_state.logging, "FAX-A "); memset(t30_amp_a, 0, sizeof(t30_amp_a)); if (t38_gateway_init(&t38_state_a, tx_packet_handler_a, &t38_state_b) == NULL) { fprintf(stderr, "Cannot start the T.38 channel\n"); exit(2); } t38_gateway_set_transmit_on_idle(&t38_state_a, use_transmit_on_idle); //t38_gateway_set_supported_modems(&t38_state_a, T30_SUPPORT_V27TER | T30_SUPPORT_V29); //t38_gateway_set_nsx_suppression(&t38_state_a, FALSE); t38_set_t38_version(&t38_state_a.t38, t38_version); t38_gateway_set_ecm_capability(&t38_state_a, use_ecm); span_log_set_level(&t38_state_a.logging, SPAN_LOG_DEBUG | SPAN_LOG_SHOW_TAG | SPAN_LOG_SHOW_SAMPLE_TIME); span_log_set_tag(&t38_state_a.logging, "T.38-A"); span_log_set_level(&t38_state_a.t38.logging, SPAN_LOG_DEBUG | SPAN_LOG_SHOW_TAG | SPAN_LOG_SHOW_SAMPLE_TIME); span_log_set_tag(&t38_state_a.t38.logging, "T.38-A"); memset(t38_amp_a, 0, sizeof(t38_amp_a)); if (t38_gateway_init(&t38_state_b, tx_packet_handler_b, &t38_state_a) == NULL) { fprintf(stderr, "Cannot start the T.38 channel\n"); exit(2); } t38_gateway_set_transmit_on_idle(&t38_state_b, use_transmit_on_idle); //t38_gateway_set_supported_modems(&t38_state_b, T30_SUPPORT_V27TER | T30_SUPPORT_V29); //t38_gateway_set_nsx_suppression(&t38_state_b, FALSE); t38_set_t38_version(&t38_state_b.t38, t38_version); t38_gateway_set_ecm_capability(&t38_state_b, use_ecm); span_log_set_level(&t38_state_b.logging, SPAN_LOG_DEBUG | SPAN_LOG_SHOW_TAG | SPAN_LOG_SHOW_SAMPLE_TIME); span_log_set_tag(&t38_state_b.logging, "T.38-B"); span_log_set_level(&t38_state_b.t38.logging, SPAN_LOG_DEBUG | SPAN_LOG_SHOW_TAG | SPAN_LOG_SHOW_SAMPLE_TIME); span_log_set_tag(&t38_state_b.t38.logging, "T.38-B"); memset(t38_amp_b, 0, sizeof(t38_amp_b)); if (fax_init(&fax_state_b, FALSE) == NULL) { fprintf(stderr, "Cannot start FAX\n"); exit(2); } fax_set_transmit_on_idle(&fax_state_b, use_transmit_on_idle); fax_set_tep_mode(&fax_state_b, use_tep); t30_set_local_ident(&fax_state_b.t30_state, "22222222"); t30_set_rx_file(&fax_state_b.t30_state, OUTPUT_FILE_NAME, -1); t30_set_phase_b_handler(&fax_state_b.t30_state, phase_b_handler, (void *) (intptr_t) 'B'); t30_set_phase_d_handler(&fax_state_b.t30_state, phase_d_handler, (void *) (intptr_t) 'B'); t30_set_phase_e_handler(&fax_state_b.t30_state, phase_e_handler, (void *) (intptr_t) 'B'); t30_set_local_nsf(&fax_state_b.t30_state, (const uint8_t *) "\x50\x00\x00\x00Spandsp\x00", 12); t30_set_ecm_capability(&fax_state_b.t30_state, use_ecm); if (use_ecm) t30_set_supported_compressions(&fax_state_b.t30_state, T30_SUPPORT_T4_1D_COMPRESSION | T30_SUPPORT_T4_2D_COMPRESSION | T30_SUPPORT_T6_COMPRESSION); span_log_set_level(&fax_state_b.logging, SPAN_LOG_DEBUG | SPAN_LOG_SHOW_TAG | SPAN_LOG_SHOW_SAMPLE_TIME); span_log_set_tag(&fax_state_b.logging, "FAX-B "); span_log_set_level(&fax_state_b.t30_state.logging, SPAN_LOG_DEBUG | SPAN_LOG_SHOW_TAG | SPAN_LOG_SHOW_SAMPLE_TIME); span_log_set_tag(&fax_state_b.t30_state.logging, "FAX-B "); memset(t30_amp_b, 0, sizeof(t30_amp_b)); #if defined(ENABLE_GUI) if (use_gui) start_media_monitor(); #endif for (;;) { span_log_bump_samples(&fax_state_a.logging, SAMPLES_PER_CHUNK); span_log_bump_samples(&fax_state_a.t30_state.logging, SAMPLES_PER_CHUNK); span_log_bump_samples(&t38_state_a.logging, SAMPLES_PER_CHUNK); span_log_bump_samples(&t38_state_a.t38.logging, SAMPLES_PER_CHUNK); span_log_bump_samples(&t38_state_b.logging, SAMPLES_PER_CHUNK); span_log_bump_samples(&t38_state_b.t38.logging, SAMPLES_PER_CHUNK); span_log_bump_samples(&fax_state_b.logging, SAMPLES_PER_CHUNK); span_log_bump_samples(&fax_state_b.t30_state.logging, SAMPLES_PER_CHUNK); memset(out_amp, 0, sizeof(out_amp)); t30_len_a = fax_tx(&fax_state_a, t30_amp_a, SAMPLES_PER_CHUNK); if (!use_transmit_on_idle) { /* The receive side always expects a full block of samples, but the transmit side may not be sending any when it doesn't need to. We may need to pad with some silence. */ if (t30_len_a < SAMPLES_PER_CHUNK) { memset(t30_amp_a + t30_len_a, 0, sizeof(int16_t)*(SAMPLES_PER_CHUNK - t30_len_a)); t30_len_a = SAMPLES_PER_CHUNK; } } if (log_audio) { for (i = 0; i < t30_len_a; i++) out_amp[i*4] = t30_amp_a[i]; } if (t38_gateway_rx(&t38_state_a, t30_amp_a, t30_len_a)) break; t38_len_a = t38_gateway_tx(&t38_state_a, t38_amp_a, SAMPLES_PER_CHUNK); if (!use_transmit_on_idle) { if (t38_len_a < SAMPLES_PER_CHUNK) { memset(t38_amp_a + t38_len_a, 0, sizeof(int16_t)*(SAMPLES_PER_CHUNK - t38_len_a)); t38_len_a = SAMPLES_PER_CHUNK; } } if (log_audio) { for (i = 0; i < t38_len_a; i++) out_amp[i*4 + 1] = t38_amp_a[i]; } if (fax_rx(&fax_state_a, t38_amp_a, SAMPLES_PER_CHUNK)) break; t30_len_b = fax_tx(&fax_state_b, t30_amp_b, SAMPLES_PER_CHUNK); if (!use_transmit_on_idle) { /* The receive side always expects a full block of samples, but the transmit side may not be sending any when it doesn't need to. We may need to pad with some silence. */ if (t30_len_b < SAMPLES_PER_CHUNK) { memset(t30_amp_b + t30_len_b, 0, sizeof(int16_t)*(SAMPLES_PER_CHUNK - t30_len_b)); t30_len_b = SAMPLES_PER_CHUNK; } } if (log_audio) { for (i = 0; i < t30_len_b; i++) out_amp[i*4 + 3] = t30_amp_b[i]; } if (t38_gateway_rx(&t38_state_b, t30_amp_b, t30_len_b)) break; t38_len_b = t38_gateway_tx(&t38_state_b, t38_amp_b, SAMPLES_PER_CHUNK); if (!use_transmit_on_idle) { if (t38_len_b < SAMPLES_PER_CHUNK) { memset(t38_amp_b + t38_len_b, 0, sizeof(int16_t)*(SAMPLES_PER_CHUNK - t38_len_b)); t38_len_b = SAMPLES_PER_CHUNK; } } if (log_audio) { for (i = 0; i < t38_len_b; i++) out_amp[i*4 + 2] = t38_amp_b[i]; } if (fax_rx(&fax_state_b, t38_amp_b, SAMPLES_PER_CHUNK)) break; when += 0.02; while ((msg_len = g1050_get(path_a_to_b, msg, 1024, when, &seq_no, &tx_when, &rx_when)) >= 0) { #if defined(ENABLE_GUI) if (use_gui) media_monitor_rx(seq_no, tx_when, rx_when); #endif t38_core_rx_ifp_packet(&t38_state_b.t38, msg, msg_len, seq_no); } while ((msg_len = g1050_get(path_b_to_a, msg, 1024, when, &seq_no, &tx_when, &rx_when)) >= 0) { #if defined(ENABLE_GUI) if (use_gui) media_monitor_rx(seq_no, tx_when, rx_when); #endif t38_core_rx_ifp_packet(&t38_state_a.t38, msg, msg_len, seq_no); } if (log_audio) { outframes = afWriteFrames(wave_handle, AF_DEFAULT_TRACK, out_amp, SAMPLES_PER_CHUNK); if (outframes != SAMPLES_PER_CHUNK) break; } if (done[0] && done[1]) break; #if defined(ENABLE_GUI) if (use_gui) media_monitor_update_display(); #endif } if (log_audio) { if (afCloseFile(wave_handle) != 0) { fprintf(stderr, " Cannot close wave file '%s'\n", OUTPUT_FILE_NAME_WAVE); exit(2); } afFreeFileSetup(filesetup); } if (!succeeded[0] || !succeeded[1]) { printf("Tests failed\n"); exit(2); } printf("Tests passed\n"); return 0; }
static int transmit_audio(fax_session *s) { int res = -1; int original_read_fmt = AST_FORMAT_SLINEAR; int original_write_fmt = AST_FORMAT_SLINEAR; fax_state_t fax; struct ast_dsp *dsp = NULL; int detect_tone = 0; struct ast_frame *inf = NULL; struct ast_frame *fr; int last_state = 0; struct timeval now, start, state_change; enum ast_control_t38 t38control; original_read_fmt = s->chan->readformat; if (original_read_fmt != AST_FORMAT_SLINEAR) { res = ast_set_read_format(s->chan, AST_FORMAT_SLINEAR); if (res < 0) { ast_log(LOG_WARNING, "Unable to set to linear read mode, giving up\n"); goto done; } } original_write_fmt = s->chan->writeformat; if (original_write_fmt != AST_FORMAT_SLINEAR) { res = ast_set_write_format(s->chan, AST_FORMAT_SLINEAR); if (res < 0) { ast_log(LOG_WARNING, "Unable to set to linear write mode, giving up\n"); goto done; } } /* Initialize T30 terminal */ fax_init(&fax, s->caller_mode); /* Setup logging */ set_logging(&fax.logging); set_logging(&fax.t30_state.logging); /* Configure terminal */ set_local_info(&fax.t30_state, s); set_file(&fax.t30_state, s); set_ecm(&fax.t30_state, TRUE); fax_set_transmit_on_idle(&fax, TRUE); t30_set_phase_e_handler(&fax.t30_state, phase_e_handler, s); if (s->t38state == T38_STATE_UNAVAILABLE) { ast_debug(1, "T38 is unavailable on %s\n", s->chan->name); } else if (!s->direction) { /* We are receiving side and this means we are the side which should request T38 when the fax is detected. Use DSP to detect fax tone */ ast_debug(1, "Setting up CNG detection on %s\n", s->chan->name); dsp = ast_dsp_new(); ast_dsp_set_features(dsp, DSP_FEATURE_FAX_DETECT); ast_dsp_set_faxmode(dsp, DSP_FAXMODE_DETECT_CNG); detect_tone = 1; } start = state_change = ast_tvnow(); ast_activate_generator(s->chan, &generator, &fax); while (!s->finished) { res = ast_waitfor(s->chan, 20); if (res < 0) break; else if (res > 0) res = 0; inf = ast_read(s->chan); if (inf == NULL) { ast_debug(1, "Channel hangup\n"); res = -1; break; } ast_debug(10, "frame %d/%d, len=%d\n", inf->frametype, inf->subclass, inf->datalen); /* Detect fax tone */ if (detect_tone && inf->frametype == AST_FRAME_VOICE) { /* Duplicate frame because ast_dsp_process may free the frame passed */ fr = ast_frdup(inf); /* Do not pass channel to ast_dsp_process otherwise it may queue modified audio frame back */ fr = ast_dsp_process(NULL, dsp, fr); if (fr && fr->frametype == AST_FRAME_DTMF && fr->subclass == 'f') { ast_debug(1, "Fax tone detected. Requesting T38\n"); t38control = AST_T38_REQUEST_NEGOTIATE; ast_indicate_data(s->chan, AST_CONTROL_T38, &t38control, sizeof(t38control)); detect_tone = 0; } ast_frfree(fr); } /* Check the frame type. Format also must be checked because there is a chance that a frame in old format was already queued before we set chanel format to slinear so it will still be received by ast_read */ if (inf->frametype == AST_FRAME_VOICE && inf->subclass == AST_FORMAT_SLINEAR) { if (fax_rx(&fax, inf->data, inf->samples) < 0) { /* I know fax_rx never returns errors. The check here is for good style only */ ast_log(LOG_WARNING, "fax_rx returned error\n"); res = -1; break; } /* Watchdog */ if (last_state != fax.t30_state.state) { state_change = ast_tvnow(); last_state = fax.t30_state.state; } } else if (inf->frametype == AST_FRAME_CONTROL && inf->subclass == AST_CONTROL_T38 && inf->datalen == sizeof(enum ast_control_t38)) { t38control =*((enum ast_control_t38 *) inf->data); if (t38control == AST_T38_NEGOTIATED) { /* T38 switchover completed */ ast_debug(1, "T38 negotiated, finishing audio loop\n"); res = 1; break; } } ast_frfree(inf); inf = NULL; /* Watchdog */ now = ast_tvnow(); if (ast_tvdiff_sec(now, start) > WATCHDOG_TOTAL_TIMEOUT || ast_tvdiff_sec(now, state_change) > WATCHDOG_STATE_TIMEOUT) { ast_log(LOG_WARNING, "It looks like we hung. Aborting.\n"); res = -1; break; } } ast_debug(1, "Loop finished, res=%d\n", res); if (inf) ast_frfree(inf); if (dsp) ast_dsp_free(dsp); ast_deactivate_generator(s->chan); /* If we are switching to T38, remove phase E handler. Otherwise it will be executed by t30_terminate, display diagnostics and set status variables although no transmittion has taken place yet. */ if (res > 0) { t30_set_phase_e_handler(&fax.t30_state, NULL, NULL); } t30_terminate(&fax.t30_state); fax_release(&fax); done: if (original_write_fmt != AST_FORMAT_SLINEAR) { if (ast_set_write_format(s->chan, original_write_fmt) < 0) ast_log(LOG_WARNING, "Unable to restore write format on '%s'\n", s->chan->name); } if (original_read_fmt != AST_FORMAT_SLINEAR) { if (ast_set_read_format(s->chan, original_read_fmt) < 0) ast_log(LOG_WARNING, "Unable to restore read format on '%s'\n", s->chan->name); } return res; }
int main(int argc, char *argv[]) { int16_t silence[SAMPLES_PER_CHUNK]; int16_t t30_amp[2][SAMPLES_PER_CHUNK]; int16_t t38_amp[2][SAMPLES_PER_CHUNK]; int16_t t38_amp_hist_a[8][SAMPLES_PER_CHUNK]; int16_t t38_amp_hist_b[8][SAMPLES_PER_CHUNK]; int16_t out_amp[SAMPLES_PER_CHUNK*4]; int16_t *fax_rx_buf[2]; int16_t *fax_tx_buf[2]; int16_t *t38_gateway_rx_buf[2]; int16_t *t38_gateway_tx_buf[2]; int t30_len[2]; int t38_len[2]; int hist_ptr; int log_audio; int msg_len; uint8_t msg[1024]; int outframes; SNDFILE *wave_handle; SNDFILE *input_wave_handle; int use_ecm; int use_tep; int feedback_audio; int use_transmit_on_idle; int t38_version; const char *input_tiff_file_name; const char *decode_file_name; int i; int j; int seq_no; int g1050_model_no; int g1050_speed_pattern_no; int t38_transport; double tx_when; double rx_when; int supported_modems; int remove_fill_bits; int opt; int start_page; int end_page; int drop_frame; int drop_frame_rate; float signal_scaling; int signal_level; int noise_level; int code_to_look_up; int scan_line_time; t38_stats_t t38_stats; t30_stats_t t30_stats; logging_state_t *logging; int expected_pages; char *page_header_info; char *page_header_tz; const char *tag; char buf[132 + 1]; #if defined(ENABLE_GUI) int use_gui; #endif #if defined(ENABLE_GUI) use_gui = FALSE; #endif log_audio = FALSE; use_ecm = FALSE; t38_version = 1; input_tiff_file_name = INPUT_TIFF_FILE_NAME; t38_simulate_incrementing_repeats = FALSE; g1050_model_no = 0; g1050_speed_pattern_no = 1; remove_fill_bits = FALSE; use_tep = FALSE; feedback_audio = FALSE; use_transmit_on_idle = TRUE; supported_modems = T30_SUPPORT_V27TER | T30_SUPPORT_V29 | T30_SUPPORT_V17; page_header_info = NULL; page_header_tz = NULL; drop_frame = 0; drop_frame_rate = 0; start_page = -1; end_page = -1; signal_level = 0; noise_level = -99; scan_line_time = 0; decode_file_name = NULL; code_to_look_up = -1; t38_transport = T38_TRANSPORT_UDPTL; while ((opt = getopt(argc, argv, "c:d:D:efFgH:i:Ilm:M:n:p:s:tT:u:v:z:")) != -1) { switch (opt) { case 'c': code_to_look_up = atoi(optarg); break; case 'd': decode_file_name = optarg; break; case 'D': drop_frame_rate = drop_frame = atoi(optarg); break; case 'e': use_ecm = TRUE; break; case 'f': feedback_audio = TRUE; break; case 'F': remove_fill_bits = TRUE; break; case 'g': #if defined(ENABLE_GUI) use_gui = TRUE; #else fprintf(stderr, "Graphical monitoring not available\n"); exit(2); #endif break; case 'H': page_header_info = optarg; break; case 'i': input_tiff_file_name = optarg; break; case 'I': t38_simulate_incrementing_repeats = TRUE; break; case 'l': log_audio = TRUE; break; case 'm': supported_modems = atoi(optarg); break; case 'M': g1050_model_no = optarg[0] - 'A' + 1; break; case 'n': noise_level = atoi(optarg); break; case 'p': for (i = 0; i < 2; i++) { switch (optarg[i]) { case 'A': mode[i] = AUDIO_FAX; break; case 'G': mode[i] = T38_GATEWAY_FAX; break; case 'T': mode[i] = T38_TERMINAL_FAX; break; default: fprintf(stderr, "Unknown FAX path element %c\n", optarg[i]); exit(2); } } if ((mode[0] == AUDIO_FAX && mode[1] != AUDIO_FAX) || (mode[0] != AUDIO_FAX && mode[1] == AUDIO_FAX)) { fprintf(stderr, "Invalid FAX path %s\n", optarg); exit(2); } break; case 's': g1050_speed_pattern_no = atoi(optarg); break; #if 0 case 's': signal_level = atoi(optarg); break; #endif case 'S': scan_line_time = atoi(optarg); break; case 't': use_tep = TRUE; break; case 'T': start_page = 0; end_page = atoi(optarg); break; case 'u': if (strcasecmp(optarg, "udptl") == 0) t38_transport = T38_TRANSPORT_UDPTL; else if (strcasecmp(optarg, "rtp") == 0) t38_transport = T38_TRANSPORT_RTP; else if (strcasecmp(optarg, "tcp") == 0) t38_transport = T38_TRANSPORT_TCP; else if (strcasecmp(optarg, "tcp-tpkt") == 0) t38_transport = T38_TRANSPORT_TCP_TPKT; else { fprintf(stderr, "Unknown T.38 transport mode\n"); exit(2); } break; case 'v': t38_version = atoi(optarg); break; case 'z': page_header_tz = optarg; break; default: //usage(); exit(2); break; } } if (code_to_look_up >= 0) { printf("Result code %d is %s\n", code_to_look_up, t30_completion_code_to_str(code_to_look_up)); exit(0); } printf("Using T.38 version %d\n", t38_version); if (use_ecm) printf("Using ECM\n"); wave_handle = NULL; if (log_audio) { if ((wave_handle = sf_open_telephony_write(OUTPUT_WAVE_FILE_NAME, 4)) == NULL) { fprintf(stderr, " Cannot create audio file '%s'\n", OUTPUT_WAVE_FILE_NAME); exit(2); } } memset(silence, 0, sizeof(silence)); srand48(0x1234567); /* Set up the nodes */ input_wave_handle = NULL; if (mode[0] == T38_TERMINAL_FAX) { } else { if (decode_file_name) { if ((input_wave_handle = sf_open_telephony_read(decode_file_name, 1)) == NULL) { fprintf(stderr, " Cannot open audio file '%s'\n", decode_file_name); exit(2); } } } for (i = 0; i < 2; i++) { tag = (i == 0) ? "A" : "B"; memset(&expected_rx_info[i], 0, sizeof(expected_rx_info[i])); if (mode[i] == T38_TERMINAL_FAX) { if ((t38_state[i] = t38_terminal_init(NULL, (i == 0), tx_packet_handler, (void *) (intptr_t) i)) == NULL) { fprintf(stderr, "Cannot start the T.38 terminal instance\n"); exit(2); } t30_state[i] = t38_terminal_get_t30_state(t38_state[i]); t38_core_state[i] = t38_terminal_get_t38_core_state(t38_state[i]); logging = t38_terminal_get_logging_state(t38_state[i]); span_log_set_level(logging, SPAN_LOG_DEBUG | SPAN_LOG_SHOW_PROTOCOL | SPAN_LOG_SHOW_TAG | SPAN_LOG_SHOW_SAMPLE_TIME); span_log_set_tag(logging, tag); logging = t38_core_get_logging_state(t38_core_state[i]); span_log_set_level(logging, SPAN_LOG_DEBUG | SPAN_LOG_SHOW_PROTOCOL | SPAN_LOG_SHOW_TAG | SPAN_LOG_SHOW_SAMPLE_TIME); span_log_set_tag(logging, tag); logging = t30_get_logging_state(t30_state[i]); span_log_set_level(logging, SPAN_LOG_DEBUG | SPAN_LOG_SHOW_PROTOCOL | SPAN_LOG_SHOW_TAG | SPAN_LOG_SHOW_SAMPLE_TIME); span_log_set_tag(logging, tag); } else { if ((fax_state[i] = fax_init(NULL, (i == 0))) == NULL) { fprintf(stderr, "Cannot start FAX instance\n"); exit(2); } t30_state[i] = fax_get_t30_state(fax_state[i]); logging = fax_get_logging_state(fax_state[i]); span_log_set_level(logging, SPAN_LOG_DEBUG | SPAN_LOG_SHOW_PROTOCOL | SPAN_LOG_SHOW_TAG | SPAN_LOG_SHOW_SAMPLE_TIME); span_log_set_tag(logging, tag); logging = fax_modems_get_logging_state(&fax_state[i]->modems); span_log_set_level(logging, SPAN_LOG_DEBUG | SPAN_LOG_SHOW_PROTOCOL | SPAN_LOG_SHOW_TAG | SPAN_LOG_SHOW_SAMPLE_TIME); span_log_set_tag(logging, tag); logging = t30_get_logging_state(t30_state[i]); span_log_set_level(logging, SPAN_LOG_DEBUG | SPAN_LOG_SHOW_PROTOCOL | SPAN_LOG_SHOW_TAG | SPAN_LOG_SHOW_SAMPLE_TIME); span_log_set_tag(logging, tag); if (mode[i] == T38_GATEWAY_FAX) { if ((t38_gateway_state[i] = t38_gateway_init(NULL, tx_packet_handler, (void *) (intptr_t) i)) == NULL) { fprintf(stderr, "Cannot start the T.38 gateway instancel\n"); exit(2); } t38_core_state[i] = t38_gateway_get_t38_core_state(t38_gateway_state[i]); logging = t38_gateway_get_logging_state(t38_gateway_state[i]); span_log_set_level(logging, SPAN_LOG_DEBUG | SPAN_LOG_SHOW_PROTOCOL | SPAN_LOG_SHOW_TAG | SPAN_LOG_SHOW_SAMPLE_TIME); span_log_set_tag(logging, tag); logging = fax_modems_get_logging_state(&t38_gateway_state[i]->audio.modems); span_log_set_level(logging, SPAN_LOG_DEBUG | SPAN_LOG_SHOW_PROTOCOL | SPAN_LOG_SHOW_TAG | SPAN_LOG_SHOW_SAMPLE_TIME); span_log_set_tag(logging, tag); logging = t38_core_get_logging_state(t38_core_state[i]); span_log_set_level(logging, SPAN_LOG_DEBUG | SPAN_LOG_SHOW_PROTOCOL | SPAN_LOG_SHOW_TAG | SPAN_LOG_SHOW_SAMPLE_TIME); span_log_set_tag(logging, tag); fax_rx_buf[i] = t38_amp[i]; fax_tx_buf[i] = t30_amp[i]; t38_gateway_rx_buf[i] = t30_amp[i]; t38_gateway_tx_buf[i] = t38_amp[i]; } else { fax_rx_buf[i] = t30_amp[i]; fax_tx_buf[i] = t30_amp[i ^ 1]; t38_gateway_rx_buf[i] = NULL; t38_gateway_tx_buf[i] = NULL; } awgn_state[i] = NULL; signal_scaling = 1.0f; if (noise_level > -99) { awgn_state[i] = awgn_init_dbm0(NULL, 1234567, noise_level); signal_scaling = powf(10.0f, signal_level/20.0f); printf("Signal scaling %f\n", signal_scaling); } } set_t30_callbacks(t30_state[i], i); } /* Set up the channels */ for (i = 0; i < 2; i++) { if ((g1050_path[i] = g1050_init(g1050_model_no, g1050_speed_pattern_no, 100, 33)) == NULL) { fprintf(stderr, "Failed to start IP network path model\n"); exit(2); } memset(audio_buffer[2*i], 0, SAMPLES_PER_CHUNK*sizeof(int16_t)); memset(audio_buffer[2*i + 1], 0, SAMPLES_PER_CHUNK*sizeof(int16_t)); memset(t30_amp[i], 0, sizeof(t30_amp[i])); memset(t38_amp[i], 0, sizeof(t38_amp[i])); } memset(t38_amp_hist_a, 0, sizeof(t38_amp_hist_a)); memset(t38_amp_hist_b, 0, sizeof(t38_amp_hist_b)); for (i = 0; i < 2; i++) { j = i + 1; sprintf(buf, "%d%d%d%d%d%d%d%d", j, j, j, j, j, j, j, j); t30_set_tx_ident(t30_state[i], buf); strcpy(expected_rx_info[i ^ 1].ident, buf); sprintf(buf, "Sub-address %d", j); t30_set_tx_sub_address(t30_state[i], buf); //strcpy(expected_rx_info[i ^ 1].sub_address, buf); sprintf(buf, "Sender ID %d", j); t30_set_tx_sender_ident(t30_state[i], buf); //strcpy(expected_rx_info[i ^ 1].sender_ident, buf); sprintf(buf, "Password %d", j); t30_set_tx_password(t30_state[i], buf); //strcpy(expected_rx_info[i ^ 1].password, buf); sprintf(buf, "Polled sub-add %d", j); t30_set_tx_polled_sub_address(t30_state[i], buf); //strcpy(expected_rx_info[i ^ 1].polled_sub_address, buf); sprintf(buf, "Select poll add %d", j); t30_set_tx_selective_polling_address(t30_state[i], buf); //strcpy(expected_rx_info[i ^ 1].selective_polling_address, buf); t30_set_tx_page_header_info(t30_state[i], page_header_info); if (page_header_tz) t30_set_tx_page_header_tz(t30_state[i], page_header_tz); if ((i & 1) == 1) { t30_set_tx_nsf(t30_state[i], (const uint8_t *) "\x50\x00\x00\x00Spandsp\x00", 12); expected_rx_info[i ^ 1].nsf = (uint8_t *) "\x50\x00\x00\x00Spandsp\x00"; expected_rx_info[i ^ 1].nsf_len = 12; } t30_set_supported_modems(t30_state[i], supported_modems); t30_set_supported_t30_features(t30_state[i], T30_SUPPORT_IDENTIFICATION | T30_SUPPORT_SELECTIVE_POLLING | T30_SUPPORT_SUB_ADDRESSING); t30_set_supported_image_sizes(t30_state[i], T30_SUPPORT_US_LETTER_LENGTH | T30_SUPPORT_US_LEGAL_LENGTH | T30_SUPPORT_UNLIMITED_LENGTH | T30_SUPPORT_215MM_WIDTH | T30_SUPPORT_255MM_WIDTH | T30_SUPPORT_303MM_WIDTH); t30_set_supported_resolutions(t30_state[i], T30_SUPPORT_STANDARD_RESOLUTION | T30_SUPPORT_FINE_RESOLUTION | T30_SUPPORT_SUPERFINE_RESOLUTION | T30_SUPPORT_R8_RESOLUTION | T30_SUPPORT_R16_RESOLUTION | T30_SUPPORT_300_300_RESOLUTION | T30_SUPPORT_400_400_RESOLUTION | T30_SUPPORT_600_600_RESOLUTION | T30_SUPPORT_1200_1200_RESOLUTION | T30_SUPPORT_300_600_RESOLUTION | T30_SUPPORT_400_800_RESOLUTION | T30_SUPPORT_600_1200_RESOLUTION); t30_set_ecm_capability(t30_state[i], use_ecm); if (use_ecm) { t30_set_supported_compressions(t30_state[i], T30_SUPPORT_T4_1D_COMPRESSION | T30_SUPPORT_T4_2D_COMPRESSION | T30_SUPPORT_T6_COMPRESSION | T30_SUPPORT_T81_COMPRESSION | T30_SUPPORT_T85_COMPRESSION | T30_SUPPORT_T85_L0_COMPRESSION); } else { t30_set_supported_compressions(t30_state[i], T30_SUPPORT_T4_1D_COMPRESSION | T30_SUPPORT_T4_2D_COMPRESSION); } t30_set_minimum_scan_line_time(t30_state[i], scan_line_time); if (mode[i] == T38_GATEWAY_FAX) { t38_gateway_set_transmit_on_idle(t38_gateway_state[i], use_transmit_on_idle); t38_gateway_set_supported_modems(t38_gateway_state[i], supported_modems); //t38_gateway_set_nsx_suppression(t38_state[i], NULL, 0, NULL, 0); t38_gateway_set_fill_bit_removal(t38_gateway_state[i], remove_fill_bits); t38_gateway_set_real_time_frame_handler(t38_gateway_state[i], real_time_gateway_frame_handler, (void *) (intptr_t) i); t38_gateway_set_ecm_capability(t38_gateway_state[i], use_ecm); } if (mode[i] != AUDIO_FAX) { t38_set_t38_version(t38_core_state[i], t38_version); } if (mode[i] == T38_TERMINAL_FAX) { //t30_set_iaf_mode(t30_state[i], T30_IAF_MODE_NO_FILL_BITS); switch (t38_transport) { case T38_TRANSPORT_UDPTL: case T38_TRANSPORT_RTP: t38_terminal_set_fill_bit_removal(t38_state[i], remove_fill_bits); t38_terminal_set_tep_mode(t38_state[i], use_tep); break; case T38_TRANSPORT_TCP: case T38_TRANSPORT_TCP_TPKT: t38_terminal_set_fill_bit_removal(t38_state[i], TRUE); t38_terminal_set_config(t38_state[i], T38_TERMINAL_OPTION_NO_PACING | T38_TERMINAL_OPTION_NO_INDICATORS); t38_terminal_set_tep_mode(t38_state[i], FALSE); break; } } else { fax_set_transmit_on_idle(fax_state[i], use_transmit_on_idle); fax_set_tep_mode(fax_state[i], use_tep); } } t30_set_tx_file(t30_state[0], input_tiff_file_name, start_page, end_page); t30_set_rx_file(t30_state[1], OUTPUT_TIFF_FILE_NAME, -1); #if defined(ENABLE_GUI) if (use_gui) start_media_monitor(); #endif hist_ptr = 0; for (;;) { memset(out_amp, 0, sizeof(out_amp)); for (i = 0; i < 2; i++) { /* Update T.30 timing */ logging = t30_get_logging_state(t30_state[i]); span_log_bump_samples(logging, SAMPLES_PER_CHUNK); if (mode[i] == T38_TERMINAL_FAX) { /* Update T.38 termination timing */ logging = t38_terminal_get_logging_state(t38_state[i]); span_log_bump_samples(logging, SAMPLES_PER_CHUNK); logging = t38_core_get_logging_state(t38_core_state[i]); span_log_bump_samples(logging, SAMPLES_PER_CHUNK); completed[i] = t38_terminal_send_timeout(t38_state[i], SAMPLES_PER_CHUNK); } else { /* Update audio FAX timing */ logging = fax_get_logging_state(fax_state[i]); span_log_bump_samples(logging, SAMPLES_PER_CHUNK); fax_rx(fax_state[i], fax_rx_buf[i], SAMPLES_PER_CHUNK); if (!t30_call_active(t30_state[i])) { completed[i] = TRUE; continue; } if (i == 0 && input_wave_handle) { t30_len[i] = sf_readf_short(input_wave_handle, fax_tx_buf[i], SAMPLES_PER_CHUNK); if (t30_len[i] == 0) break; } else { t30_len[i] = fax_tx(fax_state[i], fax_tx_buf[i], SAMPLES_PER_CHUNK); if (!use_transmit_on_idle) { /* The receive side always expects a full block of samples, but the transmit side may not be sending any when it doesn't need to. We may need to pad with some silence. */ if (t30_len[i] < SAMPLES_PER_CHUNK) { memset(t30_amp[i] + t30_len[i], 0, sizeof(int16_t)*(SAMPLES_PER_CHUNK - t30_len[i])); t30_len[i] = SAMPLES_PER_CHUNK; } } if (awgn_state[i]) { for (j = 0; j < t30_len[i]; j++) fax_tx_buf[i][j] = ((int16_t) (fax_tx_buf[i][j]*signal_scaling)) + awgn(awgn_state[i]); } } if (log_audio) { for (j = 0; j < t30_len[i]; j++) out_amp[4*j + 2*i] = t30_amp[i][j]; } if (feedback_audio) { for (j = 0; j < t30_len[i]; j++) t30_amp[i][j] += t38_amp_hist_a[hist_ptr][j] >> 1; memcpy(t38_amp_hist_a[hist_ptr], t38_amp[i], sizeof(int16_t)*SAMPLES_PER_CHUNK); } if (mode[i] == T38_GATEWAY_FAX) { /* Update T.38 gateway timing */ logging = t38_gateway_get_logging_state(t38_gateway_state[i]); span_log_bump_samples(logging, SAMPLES_PER_CHUNK); logging = t38_core_get_logging_state(t38_core_state[i]); span_log_bump_samples(logging, SAMPLES_PER_CHUNK); if (drop_frame_rate && --drop_frame == 0) { drop_frame = drop_frame_rate; if (t38_gateway_rx_fillin(t38_gateway_state[i], SAMPLES_PER_CHUNK)) break; } else { if (t38_gateway_rx(t38_gateway_state[i], t38_gateway_rx_buf[i], SAMPLES_PER_CHUNK)) break; } t38_len[i] = t38_gateway_tx(t38_gateway_state[i], t38_gateway_tx_buf[i], SAMPLES_PER_CHUNK); if (!use_transmit_on_idle) { if (t38_len[i] < SAMPLES_PER_CHUNK) { memset(t38_amp[i] + t38_len[i], 0, sizeof(int16_t)*(SAMPLES_PER_CHUNK - t38_len[i])); t38_len[i] = SAMPLES_PER_CHUNK; } } if (feedback_audio) { for (j = 0; j < t30_len[i]; j++) t30_amp[i][j] += t38_amp_hist_a[hist_ptr][j] >> 1; memcpy(t38_amp_hist_a[hist_ptr], t38_amp[i], sizeof(int16_t)*SAMPLES_PER_CHUNK); } if (log_audio) { for (j = 0; j < t38_len[i]; j++) out_amp[4*j + 2*i + 1] = t38_amp[i][j]; } } } if (mode[i] != AUDIO_FAX) { while ((msg_len = g1050_get(g1050_path[i], msg, 1024, when, &seq_no, &tx_when, &rx_when)) >= 0) { #if defined(ENABLE_GUI) if (use_gui) media_monitor_rx(seq_no, tx_when, rx_when); #endif t38_core_rx_ifp_packet(t38_core_state[i ^ 1], msg, msg_len, seq_no); } } } if (log_audio) { outframes = sf_writef_short(wave_handle, out_amp, SAMPLES_PER_CHUNK); if (outframes != SAMPLES_PER_CHUNK) break; } when += (float) SAMPLES_PER_CHUNK/(float) SAMPLE_RATE; if (completed[0] && completed[1]) break; #if defined(ENABLE_GUI) if (use_gui) media_monitor_update_display(); #endif if (++hist_ptr > 3) hist_ptr = 0; }
static int fax_audio(struct cw_channel *chan, fax_state_t *fax, const char *file, int calling_party, int verbose) { char *x; struct cw_frame *inf = NULL; struct cw_frame outf; int ready = 1; int samples = 0; int res = 0; int len = 0; int generator_mode = 0; uint64_t begin = 0; uint64_t received_frames = 0; uint8_t __buf[sizeof(uint16_t)*MAX_BLOCK_SIZE + 2*CW_FRIENDLY_OFFSET]; uint8_t *buf = __buf + CW_FRIENDLY_OFFSET; #if 0 struct cw_frame *dspf = NULL; struct cw_dsp *dsp = NULL; #endif uint64_t voice_frames; t30_state_t *t30; memset(fax, 0, sizeof(*fax)); if (fax_init(fax, calling_party) == NULL) { cw_log(LOG_WARNING, "Unable to start FAX\n"); return -1; } t30 = fax_get_t30_state(fax); fax_set_transmit_on_idle(fax, TRUE); span_log_set_message_handler(&fax->logging, span_message); span_log_set_message_handler(&t30->logging, span_message); if (verbose) { span_log_set_level(&fax->logging, SPAN_LOG_SHOW_SEVERITY | SPAN_LOG_SHOW_PROTOCOL | SPAN_LOG_FLOW); span_log_set_level(&t30->logging, SPAN_LOG_SHOW_SEVERITY | SPAN_LOG_SHOW_PROTOCOL | SPAN_LOG_FLOW); } fax_set_common(chan, t30, file, calling_party, verbose); fax_set_transmit_on_idle(fax, TRUE); if (calling_party) { voice_frames = 0; } else { #if 0 /* Initializing the DSP */ if ((dsp = cw_dsp_new()) == NULL) { cw_log(LOG_WARNING, "Unable to allocate DSP!\n"); } else { cw_dsp_set_threshold(dsp, 256); cw_dsp_set_features(dsp, DSP_FEATURE_DTMF_DETECT | DSP_FEATURE_FAX_CNG_DETECT); cw_dsp_digitmode(dsp, DSP_DIGITMODE_DTMF | DSP_DIGITMODE_RELAXDTMF); } #endif voice_frames = 1; } /* This is the main loop */ begin = nowis(); while (ready && ready_to_talk(chan)) { if (chan->t38_status == T38_NEGOTIATED) break; if ((res = cw_waitfor(chan, 20)) < 0) { ready = 0; break; } if (!t30_call_active(t30)) break; if ((inf = cw_read(chan)) == NULL) { ready = 0; break; } /* We got a frame */ if (inf->frametype == CW_FRAME_VOICE) { #if 0 if (dsp) { if ((dspf = cw_frdup(inf))) dspf = cw_dsp_process(chan, dsp, dspf); if (dspf) { if (dspf->frametype == CW_FRAME_DTMF) { if (dspf->subclass == 'f') { cw_log(LOG_DEBUG, "Fax detected in RxFax !!!\n"); cw_app_request_t38(chan); /* Prevent any further attempts to negotiate T.38 */ cw_dsp_free(dsp); dsp = NULL; } } cw_fr_free(dspf); dspf = NULL; } } #else if (voice_frames) { /* Wait a little before trying to switch to T.38, as some things don't seem to like entirely missing the audio. */ if (++voice_frames == 100) { cw_log(LOG_DEBUG, "Requesting T.38 negotation in RxFax !!!\n"); cw_app_request_t38(chan); voice_frames = 0; } } #endif received_frames++; if (fax_rx(fax, inf->data, inf->samples)) break; samples = (inf->samples <= MAX_BLOCK_SIZE) ? inf->samples : MAX_BLOCK_SIZE; if ((len = fax_tx(fax, (int16_t *) &buf[CW_FRIENDLY_OFFSET], samples)) > 0) { cw_fr_init_ex(&outf, CW_FRAME_VOICE, CW_FORMAT_SLINEAR, "FAX"); outf.datalen = len*sizeof(int16_t); outf.samples = len; outf.data = &buf[CW_FRIENDLY_OFFSET]; outf.offset = CW_FRIENDLY_OFFSET; if (cw_write(chan, &outf) < 0) { cw_log(LOG_WARNING, "Unable to write frame to channel; %s\n", strerror(errno)); break; } } } else { if ((nowis() - begin) > 1000000) { if (received_frames < 20) { /* Just to be sure we have had no frames ... */ cw_log(LOG_NOTICE, "Switching to generator mode\n"); generator_mode = 1; break; } } } cw_fr_free(inf); inf = NULL; } if (inf) { cw_fr_free(inf); inf = NULL; } if (generator_mode) { /* This is activated when we don't receive any frame for X seconds (see above)... */ cw_log(LOG_NOTICE, "Starting generator\n"); #if 0 if (dsp) cw_dsp_reset(dsp); #endif cw_generator_activate(chan, &faxgen, fax); while (ready && ready_to_talk(chan)) { if (chan->t38_status == T38_NEGOTIATED) break; if ((res = cw_waitfor(chan, 20)) < 0) { ready = 0; break; } if (!t30_call_active(t30)) break; if ((inf = cw_read(chan)) == NULL) { ready = 0; break; } /* We got a frame */ if (inf->frametype == CW_FRAME_VOICE) { #if 0 if (dsp) { if ((dspf = cw_frdup(inf))) dspf = cw_dsp_process(chan, dsp, dspf); if (dspf) { if (dspf->frametype == CW_FRAME_DTMF) { if (dspf->subclass == 'f') { cw_log(LOG_DEBUG, "Fax detected in RxFax !!!\n"); cw_app_request_t38(chan); /* Prevent any further attempts to negotiate T.38 */ cw_dsp_free(dsp); dsp = NULL; } } cw_fr_free(dspf); dspf = NULL; } } #else if (voice_frames) { if (++voice_frames == 100) { cw_log(LOG_DEBUG, "Requesting T.38 negotation in RxFax !!!\n"); cw_app_request_t38(chan); voice_frames = 0; } } #endif if (fax_rx(fax, inf->data, inf->samples)) { ready = 0; break; } } cw_fr_free(inf); inf = NULL; } if (inf) { cw_fr_free(inf); inf = NULL; } cw_log(LOG_NOTICE, "Stopping generator\n"); cw_generator_deactivate(chan); } #if 0 if (dsp) cw_dsp_free(dsp); #endif return ready; }
int main(int argc, char *argv[]) { int16_t t38_amp_b[SAMPLES_PER_CHUNK]; int16_t t30_amp_b[SAMPLES_PER_CHUNK]; int16_t out_amp[2*SAMPLES_PER_CHUNK]; int t38_len_b; int t30_len_b; int msg_len; uint8_t msg[1024]; int log_audio; int outframes; SNDFILE *wave_handle; int t38_version; int use_ecm; int use_tep; int feedback_audio; int use_transmit_on_idle; const char *input_file_name; int i; int seq_no; int g1050_model_no; int g1050_speed_pattern_no; double tx_when; double rx_when; int use_gui; int supported_modems; int opt; t30_state_t *t30; t38_core_state_t *t38_core; logging_state_t *logging; log_audio = false; t38_version = 1; use_ecm = false; input_file_name = INPUT_FILE_NAME; simulate_incrementing_repeats = false; g1050_model_no = 0; g1050_speed_pattern_no = 1; use_gui = false; use_tep = false; feedback_audio = false; use_transmit_on_idle = true; supported_modems = T30_SUPPORT_V27TER | T30_SUPPORT_V29 | T30_SUPPORT_V17; while ((opt = getopt(argc, argv, "efgi:Ilm:M:s:tv:")) != -1) { switch (opt) { case 'e': use_ecm = true; break; case 'f': feedback_audio = true; break; case 'g': #if defined(ENABLE_GUI) use_gui = true; #else fprintf(stderr, "Graphical monitoring not available\n"); exit(2); #endif break; case 'i': input_file_name = optarg; break; case 'I': simulate_incrementing_repeats = true; break; case 'l': log_audio = true; break; case 'm': supported_modems = atoi(optarg); break; case 'M': g1050_model_no = optarg[0] - 'A' + 1; break; case 's': g1050_speed_pattern_no = atoi(optarg); break; case 't': use_tep = true; break; case 'v': t38_version = atoi(optarg); break; default: //usage(); exit(2); break; } } printf("Using T.38 version %d\n", t38_version); if (use_ecm) printf("Using ECM\n"); wave_handle = NULL; if (log_audio) { if ((wave_handle = sf_open_telephony_write(OUTPUT_FILE_NAME_WAVE, 2)) == NULL) { fprintf(stderr, " Cannot create audio file '%s'\n", OUTPUT_FILE_NAME_WAVE); exit(2); } } srand48(0x1234567); if ((path_a_to_b = g1050_init(g1050_model_no, g1050_speed_pattern_no, 100, 33)) == NULL) { fprintf(stderr, "Failed to start IP network path model\n"); exit(2); } if ((path_b_to_a = g1050_init(g1050_model_no, g1050_speed_pattern_no, 100, 33)) == NULL) { fprintf(stderr, "Failed to start IP network path model\n"); exit(2); } if ((t38_state_a = t38_terminal_init(NULL, true, tx_packet_handler_a, &t38_state_b)) == NULL) { fprintf(stderr, "Cannot start the T.38 channel\n"); exit(2); } t30 = t38_terminal_get_t30_state(t38_state_a); t38_core = t38_terminal_get_t38_core_state(t38_state_a); t38_set_t38_version(t38_core, t38_version); logging = t38_terminal_get_logging_state(t38_state_a); span_log_set_level(logging, SPAN_LOG_DEBUG | SPAN_LOG_SHOW_TAG | SPAN_LOG_SHOW_SAMPLE_TIME); span_log_set_tag(logging, "T.38-A"); 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-A"); 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-A"); t30_set_supported_modems(t30, supported_modems); t30_set_tx_ident(t30, "11111111"); t30_set_tx_file(t30, input_file_name, -1, -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, use_ecm); if (use_ecm) t30_set_supported_compressions(t30, T30_SUPPORT_T4_1D_COMPRESSION | T30_SUPPORT_T4_2D_COMPRESSION | T30_SUPPORT_T6_COMPRESSION); if ((t38_state_b = t38_gateway_init(NULL, tx_packet_handler_b, &t38_state_a)) == NULL) { fprintf(stderr, "Cannot start the T.38 channel\n"); exit(2); } t38_core = t38_gateway_get_t38_core_state(t38_state_b); t38_gateway_set_transmit_on_idle(t38_state_b, use_transmit_on_idle); t38_set_t38_version(t38_core, t38_version); t38_gateway_set_ecm_capability(t38_state_b, use_ecm); logging = t38_gateway_get_logging_state(t38_state_b); span_log_set_level(logging, SPAN_LOG_DEBUG | SPAN_LOG_SHOW_TAG | SPAN_LOG_SHOW_SAMPLE_TIME); span_log_set_tag(logging, "T.38-B"); 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-B"); memset(t38_amp_b, 0, sizeof(t38_amp_b)); if ((fax_state_b = fax_init(NULL, false)) == NULL) { fprintf(stderr, "Cannot start FAX\n"); exit(2); } t30 = fax_get_t30_state(fax_state_b); fax_set_transmit_on_idle(fax_state_b, use_transmit_on_idle); fax_set_tep_mode(fax_state_b, 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); t30_set_rx_file(t30, OUTPUT_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); if (use_ecm) t30_set_supported_compressions(t30, T30_SUPPORT_T4_1D_COMPRESSION | T30_SUPPORT_T4_2D_COMPRESSION | T30_SUPPORT_T6_COMPRESSION); logging = fax_get_logging_state(fax_state_b); span_log_set_level(logging, SPAN_LOG_DEBUG | SPAN_LOG_SHOW_TAG | SPAN_LOG_SHOW_SAMPLE_TIME); span_log_set_tag(logging, "FAX-B "); 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-B "); memset(t30_amp_b, 0, sizeof(t30_amp_b)); #if defined(ENABLE_GUI) if (use_gui) start_media_monitor(); #endif for (;;) { logging = t38_terminal_get_logging_state(t38_state_a); span_log_bump_samples(logging, SAMPLES_PER_CHUNK); t38_core = t38_terminal_get_t38_core_state(t38_state_a); logging = t38_core_get_logging_state(t38_core); span_log_bump_samples(logging, SAMPLES_PER_CHUNK); t30 = t38_terminal_get_t30_state(t38_state_a); logging = t30_get_logging_state(t30); span_log_bump_samples(logging, SAMPLES_PER_CHUNK); logging = t38_gateway_get_logging_state(t38_state_b); span_log_bump_samples(logging, SAMPLES_PER_CHUNK); t38_core = t38_gateway_get_t38_core_state(t38_state_b); logging = t38_core_get_logging_state(t38_core); span_log_bump_samples(logging, SAMPLES_PER_CHUNK); logging = fax_get_logging_state(fax_state_b); span_log_bump_samples(logging, SAMPLES_PER_CHUNK); t30 = fax_get_t30_state(fax_state_b); logging = t30_get_logging_state(t30); span_log_bump_samples(logging, SAMPLES_PER_CHUNK); memset(out_amp, 0, sizeof(out_amp)); t38_terminal_send_timeout(t38_state_a, SAMPLES_PER_CHUNK); t30_len_b = fax_tx(fax_state_b, t30_amp_b, SAMPLES_PER_CHUNK); if (!use_transmit_on_idle) { /* The receive side always expects a full block of samples, but the transmit side may not be sending any when it doesn't need to. We may need to pad with some silence. */ if (t30_len_b < SAMPLES_PER_CHUNK) { memset(t30_amp_b + t30_len_b, 0, sizeof(int16_t)*(SAMPLES_PER_CHUNK - t30_len_b)); t30_len_b = SAMPLES_PER_CHUNK; } } if (feedback_audio) { for (i = 0; i < t30_len_b; i++) t30_amp_b[i] += t38_amp_b[i] >> 1; } if (log_audio) { for (i = 0; i < t30_len_b; i++) out_amp[2*i + 1] = t30_amp_b[i]; } if (t38_gateway_rx(t38_state_b, t30_amp_b, t30_len_b)) break; t38_len_b = t38_gateway_tx(t38_state_b, t38_amp_b, SAMPLES_PER_CHUNK); if (!use_transmit_on_idle) { if (t38_len_b < SAMPLES_PER_CHUNK) { memset(t38_amp_b + t38_len_b, 0, sizeof(int16_t)*(SAMPLES_PER_CHUNK - t38_len_b)); t38_len_b = SAMPLES_PER_CHUNK; } } if (log_audio) { for (i = 0; i < t38_len_b; i++) out_amp[2*i] = t38_amp_b[i]; } if (fax_rx(fax_state_b, t38_amp_b, SAMPLES_PER_CHUNK)) break; when += (float) SAMPLES_PER_CHUNK/(float) SAMPLE_RATE; while ((msg_len = g1050_get(path_a_to_b, msg, 1024, when, &seq_no, &tx_when, &rx_when)) >= 0) { #if defined(ENABLE_GUI) if (use_gui) media_monitor_rx(seq_no, tx_when, rx_when); #endif t38_core = t38_gateway_get_t38_core_state(t38_state_b); t38_core_rx_ifp_packet(t38_core, msg, msg_len, seq_no); } while ((msg_len = g1050_get(path_b_to_a, msg, 1024, when, &seq_no, &tx_when, &rx_when)) >= 0) { #if defined(ENABLE_GUI) if (use_gui) media_monitor_rx(seq_no, tx_when, rx_when); #endif t38_core = t38_terminal_get_t38_core_state(t38_state_a); t38_core_rx_ifp_packet(t38_core, msg, msg_len, seq_no); } if (log_audio) { outframes = sf_writef_short(wave_handle, out_amp, SAMPLES_PER_CHUNK); if (outframes != SAMPLES_PER_CHUNK) break; } if (done[0] && done[1]) break; #if defined(ENABLE_GUI) if (use_gui) media_monitor_update_display(); #endif } t38_terminal_release(t38_state_a); fax_release(fax_state_b); if (log_audio) { if (sf_close(wave_handle) != 0) { fprintf(stderr, " Cannot close audio file '%s'\n", OUTPUT_FILE_NAME_WAVE); exit(2); } } if (!succeeded[0] || !succeeded[1]) { printf("Tests failed\n"); exit(2); } printf("Tests passed\n"); return 0; }
int main(int argc, char *argv[]) { t30_state_t *t30; logging_state_t *logging; const char *input_file_name; int t38_version; int caller; int use_ecm; int use_tep; int options; int supported_modems; int fill_removal; int opt; int t38_terminal_operation; uint32_t src_addr; uint16_t src_port; uint32_t dest_addr; uint16_t dest_port; caller = false; use_ecm = false; t38_version = 0; options = 0; input_file_name = INPUT_FILE_NAME; fill_removal = false; use_tep = false; use_transmit_on_idle = true; supported_modems = T30_SUPPORT_V27TER | T30_SUPPORT_V29 | T30_SUPPORT_V17; t38_terminal_operation = true; log_audio = false; src_addr = 0; src_port = 0; dest_addr = 0; dest_port = 0; while ((opt = getopt(argc, argv, "cD:d:eFGi:lm:oS:s:tv:")) != -1) { switch (opt) { case 'c': caller = true; break; case 'D': dest_addr = parse_inet_addr(optarg); break; case 'd': dest_port = atoi(optarg); break; case 'e': use_ecm = true; break; case 'F': fill_removal = true; break; case 'G': t38_terminal_operation = false; break; case 'i': input_file_name = optarg; break; case 'l': log_audio = true; break; case 'm': supported_modems = atoi(optarg); break; case 'o': options = atoi(optarg); break; case 'S': src_addr = parse_inet_addr(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; } } printf("Using T.38 version %d\n", t38_version); if (t38_terminal_operation) { if ((t38_terminal_state = t38_terminal_init(NULL, caller, tx_packet_handler, NULL)) == NULL) { fprintf(stderr, "Cannot start the T.38 channel\n"); exit(2); } t30 = t38_terminal_get_t30_state(t38_terminal_state); t38_core = t38_terminal_get_t38_core_state(t38_terminal_state); t38_set_t38_version(t38_core, t38_version); t38_terminal_set_config(t38_terminal_state, options); t38_terminal_set_tep_mode(t38_terminal_state, use_tep); t38_terminal_set_fill_bit_removal(t38_terminal_state, fill_removal); logging = t38_terminal_get_logging_state(t38_terminal_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); 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) '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, use_ecm); t30_set_supported_compressions(t30, T4_COMPRESSION_T4_1D | T4_COMPRESSION_T4_2D | T4_COMPRESSION_T6 | T4_COMPRESSION_T85); if (pcap_scan_pkts(input_file_name, src_addr, src_port, dest_addr, dest_port, t38_terminal_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_terminal_timing_update(NULL, &now); } else { wave_handle = NULL; if (log_audio) { if ((wave_handle = sf_open_telephony_write(OUTPUT_WAVE_FILE_NAME, 2)) == NULL) { fprintf(stderr, " Cannot create audio file '%s'\n", OUTPUT_WAVE_FILE_NAME); exit(2); } } 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); 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); } } } }
int main(int argc, char *argv[]) { SNDFILE *wave_handle; SNDFILE *input_wave_handle; int i; int j; int k; struct machine_s *mc; int outframes; char buf[128 + 1]; int16_t silence[SAMPLES_PER_CHUNK]; int16_t out_amp[2*SAMPLES_PER_CHUNK]; int alldone; const char *input_tiff_file_name; const char *input_audio_file_name; int log_audio; int use_ecm; int use_tep; int use_transmit_on_idle; #if defined(WITH_SPANDSP_INTERNALS) int use_line_hits; #endif int polled_mode; int reverse_flow; int use_page_limits; int supported_modems; int signal_level; int noise_level; float signal_scaling; time_t start_time; time_t end_time; int scan_line_time; char *page_header_info; int opt; t30_state_t *t30; logging_state_t *logging; log_audio = false; input_tiff_file_name = INPUT_TIFF_FILE_NAME; input_audio_file_name = NULL; use_ecm = false; #if defined(WITH_SPANDSP_INTERNALS) use_line_hits = false; #endif use_tep = false; polled_mode = false; page_header_info = NULL; reverse_flow = false; use_transmit_on_idle = true; use_receiver_not_ready = false; use_page_limits = false; signal_level = 0; noise_level = -99; scan_line_time = 0; supported_modems = T30_SUPPORT_V27TER | T30_SUPPORT_V29 | T30_SUPPORT_V17; while ((opt = getopt(argc, argv, "ehH:i:I:lm:n:prRs:S:tTw:")) != -1) { switch (opt) { case 'e': use_ecm = true; break; #if defined(WITH_SPANDSP_INTERNALS) case 'h': use_line_hits = true; break; #endif case 'H': page_header_info = optarg; break; case 'i': input_tiff_file_name = optarg; break; case 'I': input_audio_file_name = optarg; break; case 'l': log_audio = true; break; case 'm': supported_modems = atoi(optarg); break; case 'n': noise_level = atoi(optarg); break; case 'p': polled_mode = true; break; case 'r': reverse_flow = true; break; case 'R': use_receiver_not_ready = true; break; case 's': signal_level = atoi(optarg); break; case 'S': scan_line_time = atoi(optarg); break; case 't': use_tep = true; break; case 'T': use_page_limits = true; break; case 'w': t30_state_to_wreck = atoi(optarg); break; default: //usage(); exit(2); break; } } input_wave_handle = NULL; if (input_audio_file_name) { if ((input_wave_handle = sf_open_telephony_read(input_audio_file_name, 1)) == NULL) { fprintf(stderr, " Cannot open audio file '%s'\n", input_audio_file_name); exit(2); } } wave_handle = NULL; if (log_audio) { if ((wave_handle = sf_open_telephony_write(OUTPUT_FILE_NAME_WAVE, 2)) == NULL) { fprintf(stderr, " Cannot create audio file '%s'\n", OUTPUT_FILE_NAME_WAVE); exit(2); } } memset(silence, 0, sizeof(silence)); for (j = 0; j < FAX_MACHINES; j++) { machines[j].chan = j; mc = &machines[j]; i = mc->chan + 1; sprintf(buf, "%d%d%d%d%d%d%d%d", i, i, i, i, i, i, i, i); if (reverse_flow) mc->fax = fax_init(NULL, (mc->chan & 1) ? true : false); else mc->fax = fax_init(NULL, (mc->chan & 1) ? false : true); mc->awgn = NULL; signal_scaling = 1.0f; if (noise_level > -99) { mc->awgn = awgn_init_dbm0(NULL, 1234567, noise_level); signal_scaling = powf(10.0f, signal_level/20.0f); printf("Signal scaling %f\n", signal_scaling); } fax_set_transmit_on_idle(mc->fax, use_transmit_on_idle); fax_set_tep_mode(mc->fax, use_tep); t30 = fax_get_t30_state(mc->fax); t30_set_tx_ident(t30, buf); t30_set_tx_sub_address(t30, "Sub-address"); t30_set_tx_sender_ident(t30, "Sender ID"); t30_set_tx_password(t30, "Password"); t30_set_tx_polled_sub_address(t30, "Polled sub-address"); t30_set_tx_selective_polling_address(t30, "Selective polling address"); t30_set_tx_page_header_info(t30, page_header_info); t30_set_tx_nsf(t30, (const uint8_t *) "\x50\x00\x00\x00Spandsp\x00", 12); t30_set_ecm_capability(t30, use_ecm); t30_set_supported_t30_features(t30, T30_SUPPORT_IDENTIFICATION | T30_SUPPORT_SELECTIVE_POLLING | T30_SUPPORT_SUB_ADDRESSING); if ((mc->chan & 1)) t30_set_minimum_scan_line_time(t30, scan_line_time); t30_set_supported_image_sizes(t30, T30_SUPPORT_US_LETTER_LENGTH | T30_SUPPORT_US_LEGAL_LENGTH | T30_SUPPORT_UNLIMITED_LENGTH | T30_SUPPORT_215MM_WIDTH | T30_SUPPORT_255MM_WIDTH | T30_SUPPORT_303MM_WIDTH); t30_set_supported_resolutions(t30, T30_SUPPORT_STANDARD_RESOLUTION | T30_SUPPORT_FINE_RESOLUTION | T30_SUPPORT_SUPERFINE_RESOLUTION | T30_SUPPORT_R8_RESOLUTION | T30_SUPPORT_R16_RESOLUTION | T30_SUPPORT_300_300_RESOLUTION | T30_SUPPORT_400_400_RESOLUTION | T30_SUPPORT_600_600_RESOLUTION | T30_SUPPORT_1200_1200_RESOLUTION | T30_SUPPORT_300_600_RESOLUTION | T30_SUPPORT_400_800_RESOLUTION | T30_SUPPORT_600_1200_RESOLUTION); t30_set_supported_modems(t30, supported_modems); if (use_ecm) #if defined(SPANDSP_SUPPORT_T85) t30_set_supported_compressions(t30, T30_SUPPORT_T4_1D_COMPRESSION | T30_SUPPORT_T4_2D_COMPRESSION | T30_SUPPORT_T6_COMPRESSION | T30_SUPPORT_T85_COMPRESSION); #else t30_set_supported_compressions(t30, T30_SUPPORT_T4_1D_COMPRESSION | T30_SUPPORT_T4_2D_COMPRESSION | T30_SUPPORT_T6_COMPRESSION); #endif if ((mc->chan & 1)) { if (polled_mode) { if (use_page_limits) t30_set_tx_file(t30, input_tiff_file_name, 3, 6); else t30_set_tx_file(t30, input_tiff_file_name, -1, -1); } else { sprintf(buf, "fax_tests_%d.tif", (mc->chan + 1)/2); t30_set_rx_file(t30, buf, -1); t30_set_rx_encoding(t30, T4_COMPRESSION_ITU_T6); } } else { if (polled_mode) { sprintf(buf, "fax_tests_%d.tif", (mc->chan + 1)/2); t30_set_rx_file(t30, buf, -1); t30_set_rx_encoding(t30, T4_COMPRESSION_ITU_T6); } else { if (use_page_limits) t30_set_tx_file(t30, input_tiff_file_name, 3, 6); else t30_set_tx_file(t30, input_tiff_file_name, -1, -1); } } t30_set_phase_b_handler(t30, phase_b_handler, (void *) (intptr_t) mc->chan + 'A'); t30_set_phase_d_handler(t30, phase_d_handler, (void *) (intptr_t) mc->chan + 'A'); t30_set_phase_e_handler(t30, phase_e_handler, (void *) (intptr_t) mc->chan + 'A'); t30_set_real_time_frame_handler(t30, real_time_frame_handler, (void *) (intptr_t) mc->chan + 'A'); t30_set_document_handler(t30, document_handler, (void *) (intptr_t) mc->chan + 'A'); sprintf(mc->tag, "FAX-%d", j + 1); logging = t30_get_logging_state(t30); span_log_set_level(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(logging, mc->tag); if ((j & 1)) { span_log_set_level(&t30->t4.rx.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(&t30->t4.rx.logging, mc->tag); } else { span_log_set_level(&t30->t4.tx.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(&t30->t4.tx.logging, mc->tag); } logging = fax_get_logging_state(mc->fax); span_log_set_level(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(logging, mc->tag); memset(mc->amp, 0, sizeof(mc->amp)); mc->total_audio_time = 0; mc->done = false; } time(&start_time); for (;;) { alldone = true; for (j = 0; j < FAX_MACHINES; j++) { mc = &machines[j]; if ((j & 1) == 0 && input_audio_file_name) { mc->len = sf_readf_short(input_wave_handle, mc->amp, SAMPLES_PER_CHUNK); if (mc->len == 0) break; } else { mc->len = fax_tx(mc->fax, mc->amp, SAMPLES_PER_CHUNK); if (mc->awgn) { for (k = 0; k < mc->len; k++) mc->amp[k] = ((int16_t) (mc->amp[k]*signal_scaling)) + awgn(mc->awgn); } } mc->total_audio_time += SAMPLES_PER_CHUNK; if (!use_transmit_on_idle) { /* The receive side always expects a full block of samples, but the transmit side may not be sending any when it doesn't need to. We may need to pad with some silence. */ if (mc->len < SAMPLES_PER_CHUNK) { memset(mc->amp + mc->len, 0, sizeof(int16_t)*(SAMPLES_PER_CHUNK - mc->len)); mc->len = SAMPLES_PER_CHUNK; } } t30 = fax_get_t30_state(mc->fax); logging = t30_get_logging_state(t30); span_log_bump_samples(logging, mc->len); logging = fax_get_logging_state(mc->fax); span_log_bump_samples(logging, mc->len); if (log_audio) { for (k = 0; k < mc->len; k++) out_amp[2*k + j] = mc->amp[k]; } if (machines[j ^ 1].len < SAMPLES_PER_CHUNK) memset(machines[j ^ 1].amp + machines[j ^ 1].len, 0, sizeof(int16_t)*(SAMPLES_PER_CHUNK - machines[j ^ 1].len)); t30 = fax_get_t30_state(mc->fax); #if defined(WITH_SPANDSP_INTERNALS) if (use_line_hits) { /* TODO: This applies very crude line hits. improve it */ if (t30->state == 22) { if (++mc->error_delay == 100) { fprintf(stderr, "HIT %d!\n", j); mc->error_delay = 0; for (k = 0; k < 5; k++) mc->amp[k] = 0; } } } if (t30->state == t30_state_to_wreck) memset(machines[j ^ 1].amp, 0, sizeof(int16_t)*SAMPLES_PER_CHUNK); #endif if (fax_rx(mc->fax, machines[j ^ 1].amp, SAMPLES_PER_CHUNK)) break; if (!mc->done) alldone = false; } if (log_audio) { outframes = sf_writef_short(wave_handle, out_amp, SAMPLES_PER_CHUNK); if (outframes != SAMPLES_PER_CHUNK) break; } if (alldone || j < FAX_MACHINES) break; } time(&end_time); for (j = 0; j < FAX_MACHINES; j++) { mc = &machines[j]; fax_release(mc->fax); } if (log_audio) { if (sf_close(wave_handle)) { fprintf(stderr, " Cannot close audio file '%s'\n", OUTPUT_FILE_NAME_WAVE); exit(2); } } if (input_audio_file_name) { if (sf_close(input_wave_handle)) { fprintf(stderr, " Cannot close audio file '%s'\n", input_audio_file_name); exit(2); } } printf("Total audio time = %ds (wall time %ds)\n", machines[0].total_audio_time/8000, (int) (end_time - start_time)); return 0; }