static void fax_set_rx_type(void *user_data, int type, int bit_rate, int short_train, int use_hdlc)
{
fax_state_t *s;
put_bit_func_t put_bit_func;
void *put_bit_user_data;
fax_modems_state_t *t;
s = (fax_state_t *) user_data;
t = &s->modems;
span_log(&s->logging, SPAN_LOG_FLOW, "Set rx type %d\n", type);
if (t->current_rx_type == type)
return;
/*endif*/
t->current_rx_type = type;
t->rx_bit_rate = bit_rate;
if (use_hdlc)
{
put_bit_func = (put_bit_func_t) hdlc_rx_put_bit;
put_bit_user_data = (void *) &t->hdlc_rx;
hdlc_rx_init(&t->hdlc_rx, false, true, HDLC_FRAMING_OK_THRESHOLD, t30_hdlc_accept, &s->t30);
}
else
{
put_bit_func = t30_non_ecm_put_bit;
put_bit_user_data = (void *) &s->t30;
}
/*endif*/
switch (type)
{
case T30_MODEM_V21:
fsk_rx_init(&t->v21_rx, &preset_fsk_specs[FSK_V21CH2], FSK_FRAME_MODE_SYNC, (put_bit_func_t) hdlc_rx_put_bit, put_bit_user_data);
fsk_rx_signal_cutoff(&t->v21_rx, -45.5f);
set_rx_handler(s, (span_rx_handler_t *) &fsk_rx, (span_rx_fillin_handler_t *) &fsk_rx_fillin, &t->v21_rx);
break;
case T30_MODEM_V17:
v17_rx_restart(&t->fast_modems.v17_rx, bit_rate, short_train);
v17_rx_set_put_bit(&t->fast_modems.v17_rx, put_bit_func, put_bit_user_data);
set_rx_handler(s, &v17_v21_rx, &v17_v21_rx_fillin, s);
break;
case T30_MODEM_V27TER:
v27ter_rx_restart(&t->fast_modems.v27ter_rx, bit_rate, false);
v27ter_rx_set_put_bit(&t->fast_modems.v27ter_rx, put_bit_func, put_bit_user_data);
set_rx_handler(s, &v27ter_v21_rx, &v27ter_v21_rx_fillin, s);
break;
case T30_MODEM_V29:
v29_rx_restart(&t->fast_modems.v29_rx, bit_rate, false);
v29_rx_set_put_bit(&t->fast_modems.v29_rx, put_bit_func, put_bit_user_data);
set_rx_handler(s, &v29_v21_rx, &v29_v21_rx_fillin, s);
break;
case T30_MODEM_DONE:
span_log(&s->logging, SPAN_LOG_FLOW, "FAX exchange complete\n");
default:
set_rx_handler(s, (span_rx_handler_t *) &span_dummy_rx, (span_rx_fillin_handler_t *) &span_dummy_rx_fillin, s);
break;
}
/*endswitch*/
}
int main(int argc, char *argv[])
{
v17_rx_state_t *rx;
v17_tx_state_t *tx;
bert_results_t bert_results;
int16_t gen_amp[BLOCK_LEN];
int16_t amp[BLOCK_LEN];
SNDFILE *inhandle;
SNDFILE *outhandle;
int outframes;
int samples;
int tep;
int block_no;
int noise_level;
int signal_level;
int bits_per_test;
int line_model_no;
int log_audio;
int channel_codec;
int rbs_pattern;
int opt;
logging_state_t *logging;
channel_codec = MUNGE_CODEC_NONE;
rbs_pattern = 0;
test_bps = 14400;
tep = FALSE;
line_model_no = 0;
decode_test_file = NULL;
use_gui = FALSE;
noise_level = -70;
signal_level = -13;
bits_per_test = 50000;
log_audio = FALSE;
while ((opt = getopt(argc, argv, "b:B:c:d:glm:n:r:s:t")) != -1)
{
switch (opt)
{
case 'b':
test_bps = atoi(optarg);
if (test_bps != 14400
&&
test_bps != 12000
&&
test_bps != 9600
&&
test_bps != 7200
&&
test_bps != 4800)
{
/* 4800 is an extension of V.17, to provide full coverage of the V.32bis modes */
fprintf(stderr, "Invalid bit rate specified\n");
exit(2);
}
break;
case 'B':
bits_per_test = atoi(optarg);
break;
case 'c':
channel_codec = atoi(optarg);
break;
case 'd':
decode_test_file = optarg;
break;
case 'g':
#if defined(ENABLE_GUI)
use_gui = TRUE;
#else
fprintf(stderr, "Graphical monitoring not available\n");
exit(2);
#endif
break;
case 'l':
log_audio = TRUE;
break;
case 'm':
line_model_no = atoi(optarg);
break;
case 'n':
noise_level = atoi(optarg);
break;
case 'r':
rbs_pattern = atoi(optarg);
break;
case 's':
signal_level = atoi(optarg);
break;
case 't':
tep = TRUE;
break;
default:
//usage();
exit(2);
break;
}
}
inhandle = NULL;
outhandle = NULL;
#if defined(HAVE_FENV_H)
fpe_trap_setup();
#endif
if (log_audio)
{
if ((outhandle = sf_open_telephony_write(OUT_FILE_NAME, 1)) == NULL)
{
fprintf(stderr, " Cannot create audio file '%s'\n", OUT_FILE_NAME);
exit(2);
}
}
if (decode_test_file)
{
/* We will decode the audio from a file. */
tx = NULL;
if ((inhandle = sf_open_telephony_read(decode_test_file, 1)) == NULL)
{
fprintf(stderr, " Cannot open audio file '%s'\n", decode_test_file);
exit(2);
}
}
else
{
/* We will generate V.17 audio, and add some noise to it. */
tx = v17_tx_init(NULL, test_bps, tep, v17getbit, NULL);
logging = v17_tx_get_logging_state(tx);
span_log_set_level(logging, SPAN_LOG_SHOW_SEVERITY | SPAN_LOG_SHOW_PROTOCOL | SPAN_LOG_FLOW);
span_log_set_tag(logging, "V.17-tx");
v17_tx_power(tx, signal_level);
v17_tx_set_modem_status_handler(tx, v17_tx_status, (void *) tx);
#if defined(WITH_SPANDSP_INTERNALS)
/* Move the carrier off a bit */
tx->carrier_phase_rate = dds_phase_ratef(1792.0f);
tx->carrier_phase = 0x40000000;
#endif
bert_init(&bert, bits_per_test, BERT_PATTERN_ITU_O152_11, test_bps, 20);
bert_set_report(&bert, 10000, reporter, NULL);
if ((line_model = one_way_line_model_init(line_model_no, (float) noise_level, channel_codec, rbs_pattern)) == NULL)
{
fprintf(stderr, " Failed to create line model\n");
exit(2);
}
one_way_line_model_set_dc(line_model, 0.0f);
#if defined(ADD_MAINS_INTERFERENCE)
one_way_line_model_set_mains_pickup(line_model, 50, -40.0f);
#endif
}
rx = v17_rx_init(NULL, test_bps, v17putbit, NULL);
logging = v17_rx_get_logging_state(rx);
span_log_set_level(logging, SPAN_LOG_SHOW_SEVERITY | SPAN_LOG_SHOW_PROTOCOL | SPAN_LOG_FLOW);
span_log_set_tag(logging, "V.17-rx");
v17_rx_set_modem_status_handler(rx, v17_rx_status, (void *) rx);
v17_rx_set_qam_report_handler(rx, qam_report, (void *) rx);
#if defined(ENABLE_GUI)
if (use_gui)
{
qam_monitor = qam_monitor_init(10.0f, NULL);
if (!decode_test_file)
{
start_line_model_monitor(129);
line_model_monitor_line_model_update(line_model->near_filter, line_model->near_filter_len);
}
}
#endif
memset(&latest_results, 0, sizeof(latest_results));
for (block_no = 0; block_no < 100000000; block_no++)
{
if (decode_test_file)
{
samples = sf_readf_short(inhandle, amp, BLOCK_LEN);
#if defined(ENABLE_GUI)
if (use_gui)
qam_monitor_update_audio_level(qam_monitor, amp, samples);
#endif
if (samples == 0)
break;
}
else
{
samples = v17_tx(tx, gen_amp, BLOCK_LEN);
#if defined(ENABLE_GUI)
if (use_gui)
qam_monitor_update_audio_level(qam_monitor, gen_amp, samples);
#endif
if (samples == 0)
{
printf("Restarting on zero output\n");
/* Push a little silence through, to ensure all the data bits get out of the buffers */
vec_zeroi16(amp, BLOCK_LEN);
v17_rx(rx, amp, BLOCK_LEN);
/* Note that we might get a few bad bits as the carrier shuts down. */
bert_result(&bert, &bert_results);
fprintf(stderr, "Final result %ddBm0/%ddBm0, %d bits, %d bad bits, %d resyncs\n", signal_level, noise_level, bert_results.total_bits, bert_results.bad_bits, bert_results.resyncs);
fprintf(stderr, "Last report %ddBm0/%ddBm0, %d bits, %d bad bits, %d resyncs\n", signal_level, noise_level, latest_results.total_bits, latest_results.bad_bits, latest_results.resyncs);
/* See if bit errors are appearing yet. Also check we are getting enough bits out of the receiver. The last regular report
should be error free, though the final report will generally contain bits errors as the carrier was dying. The total
number of bits out of the receiver should be at least the number we sent. Also, since BERT sync should have occurred
rapidly at the start of transmission, the last report should have occurred at not much less than the total number of
bits we sent. */
if (bert_results.total_bits < bits_per_test
||
latest_results.total_bits < bits_per_test - 100
||
latest_results.bad_bits != 0)
{
break;
}
memset(&latest_results, 0, sizeof(latest_results));
#if defined(WITH_SPANDSP_INTERNALS)
signal_level--;
/* Bump the receiver AGC gain by 1dB, to compensate for the above */
rx->agc_scaling_save *= 1.122f;
#endif
v17_tx_restart(tx, test_bps, tep, TRUE);
v17_tx_power(tx, signal_level);
v17_rx_restart(rx, test_bps, TRUE);
//rx.eq_put_step = rand()%(192*10/3);
bert_init(&bert, bits_per_test, BERT_PATTERN_ITU_O152_11, test_bps, 20);
bert_set_report(&bert, 10000, reporter, NULL);
one_way_line_model_release(line_model);
if ((line_model = one_way_line_model_init(line_model_no, (float) noise_level, channel_codec, 0)) == NULL)
{
fprintf(stderr, " Failed to create line model\n");
exit(2);
}
}
if (log_audio)
{
outframes = sf_writef_short(outhandle, gen_amp, samples);
if (outframes != samples)
{
fprintf(stderr, " Error writing audio file\n");
exit(2);
}
}
one_way_line_model(line_model, amp, gen_amp, samples);
}
#if defined(ENABLE_GUI)
if (use_gui && !decode_test_file)
line_model_monitor_line_spectrum_update(amp, samples);
#endif
v17_rx(rx, amp, samples);
}
if (!decode_test_file)
{
bert_result(&bert, &bert_results);
fprintf(stderr, "At completion:\n");
fprintf(stderr, "Final result %ddBm0/%ddBm0, %d bits, %d bad bits, %d resyncs\n", signal_level, noise_level, bert_results.total_bits, bert_results.bad_bits, bert_results.resyncs);
fprintf(stderr, "Last report %ddBm0/%ddBm0, %d bits, %d bad bits, %d resyncs\n", signal_level, noise_level, latest_results.total_bits, latest_results.bad_bits, latest_results.resyncs);
one_way_line_model_release(line_model);
if (signal_level > -43)
{
printf("Tests failed.\n");
exit(2);
}
printf("Tests passed.\n");
}
#if defined(ENABLE_GUI)
if (use_gui)
qam_wait_to_end(qam_monitor);
#endif
if (decode_test_file)
{
if (sf_close_telephony(inhandle))
{
fprintf(stderr, " Cannot close audio file '%s'\n", decode_test_file);
exit(2);
}
}
if (log_audio)
{
if (sf_close_telephony(outhandle))
{
fprintf(stderr, " Cannot close audio file '%s'\n", OUT_FILE_NAME);
exit(2);
}
}
return 0;
}
SPAN_DECLARE(void) fax_modems_start_fast_modem(fax_modems_state_t *s, int which, int bit_rate, int short_train, int hdlc_mode)
{
put_bit_func_t put_bit;
get_bit_func_t get_bit;
void *get_bit_user_data;
void *put_bit_user_data;
s->bit_rate = bit_rate;
if (hdlc_mode)
{
get_bit = (get_bit_func_t) hdlc_tx_get_bit;
get_bit_user_data = (void *) &s->hdlc_tx;
put_bit = (put_bit_func_t) hdlc_rx_put_bit;
put_bit_user_data = (void *) &s->hdlc_rx;
}
else
{
get_bit = s->get_bit;
get_bit_user_data = s->get_bit_user_data;
put_bit = s->put_bit;
put_bit_user_data = s->put_bit_user_data;
}
/*endif*/
/* If we change modems we need to do a complete reinitialisation of the modem, because
the modems use overlapping memory. */
if (s->fast_modem != which)
{
s->current_rx_type = which;
s->short_train = false;
s->fast_modem = which;
if (hdlc_mode)
s->rx_frame_received = false;
switch (s->fast_modem)
{
case FAX_MODEM_V27TER_RX:
v27ter_rx_init(&s->fast_modems.v27ter_rx, s->bit_rate, put_bit, put_bit_user_data);
v27ter_rx_set_modem_status_handler(&s->fast_modems.v27ter_rx, v27ter_rx_status_handler, s);
fax_modems_set_rx_handler(s, (span_rx_handler_t) &fax_modems_v27ter_v21_rx, s, (span_rx_fillin_handler_t) &fax_modems_v27ter_v21_rx_fillin, s);
break;
case FAX_MODEM_V29_RX:
v29_rx_init(&s->fast_modems.v29_rx, s->bit_rate, put_bit, put_bit_user_data);
v29_rx_signal_cutoff(&s->fast_modems.v29_rx, -45.5f);
v29_rx_set_modem_status_handler(&s->fast_modems.v29_rx, v29_rx_status_handler, s);
fax_modems_set_rx_handler(s, (span_rx_handler_t) &fax_modems_v29_v21_rx, s, (span_rx_fillin_handler_t) &fax_modems_v29_v21_rx_fillin, s);
break;
case FAX_MODEM_V17_RX:
v17_rx_init(&s->fast_modems.v17_rx, s->bit_rate, put_bit, put_bit_user_data);
v17_rx_set_modem_status_handler(&s->fast_modems.v17_rx, v17_rx_status_handler, s);
fax_modems_set_rx_handler(s, (span_rx_handler_t) &fax_modems_v17_v21_rx, s, (span_rx_fillin_handler_t) &fax_modems_v17_v21_rx_fillin, s);
break;
case FAX_MODEM_V27TER_TX:
v27ter_tx_init(&s->fast_modems.v27ter_tx, s->bit_rate, s->use_tep, get_bit, get_bit_user_data);
fax_modems_set_tx_handler(s, (span_tx_handler_t) &v27ter_tx, &s->fast_modems.v27ter_tx);
fax_modems_set_next_tx_handler(s, (span_tx_handler_t) NULL, NULL);
break;
case FAX_MODEM_V29_TX:
v29_tx_init(&s->fast_modems.v29_tx, s->bit_rate, s->use_tep, get_bit, get_bit_user_data);
fax_modems_set_tx_handler(s, (span_tx_handler_t) &v29_tx, &s->fast_modems.v29_tx);
fax_modems_set_next_tx_handler(s, (span_tx_handler_t) NULL, NULL);
break;
case FAX_MODEM_V17_TX:
v17_tx_init(&s->fast_modems.v17_tx, s->bit_rate, s->use_tep, get_bit, get_bit_user_data);
fax_modems_set_tx_handler(s, (span_tx_handler_t) &v17_tx, &s->fast_modems.v17_tx);
fax_modems_set_next_tx_handler(s, (span_tx_handler_t) NULL, NULL);
break;
}
/*endswitch*/
}
else
{
s->short_train = short_train;
switch (s->fast_modem)
{
case FAX_MODEM_V27TER_RX:
v27ter_rx_restart(&s->fast_modems.v27ter_rx, s->bit_rate, false);
v27ter_rx_set_put_bit(&s->fast_modems.v27ter_rx, put_bit, put_bit_user_data);
v27ter_rx_set_modem_status_handler(&s->fast_modems.v27ter_rx, v27ter_rx_status_handler, s);
fax_modems_set_rx_handler(s, (span_rx_handler_t) &fax_modems_v27ter_v21_rx, s, (span_rx_fillin_handler_t) &fax_modems_v27ter_v21_rx_fillin, s);
break;
case FAX_MODEM_V29_RX:
v29_rx_restart(&s->fast_modems.v29_rx, s->bit_rate, false);
v29_rx_set_put_bit(&s->fast_modems.v29_rx, put_bit, put_bit_user_data);
v29_rx_set_modem_status_handler(&s->fast_modems.v29_rx, v29_rx_status_handler, s);
fax_modems_set_rx_handler(s, (span_rx_handler_t) &fax_modems_v29_v21_rx, s, (span_rx_fillin_handler_t) &fax_modems_v29_v21_rx_fillin, s);
break;
case FAX_MODEM_V17_RX:
v17_rx_restart(&s->fast_modems.v17_rx, s->bit_rate, s->short_train);
v17_rx_set_put_bit(&s->fast_modems.v17_rx, put_bit, put_bit_user_data);
v17_rx_set_modem_status_handler(&s->fast_modems.v17_rx, v17_rx_status_handler, s);
fax_modems_set_rx_handler(s, (span_rx_handler_t) &fax_modems_v17_v21_rx, s, (span_rx_fillin_handler_t) &fax_modems_v17_v21_rx_fillin, s);
break;
case FAX_MODEM_V27TER_TX:
v27ter_tx_restart(&s->fast_modems.v27ter_tx, s->bit_rate, s->use_tep);
v27ter_tx_set_get_bit(&s->fast_modems.v27ter_tx, get_bit, get_bit_user_data);
fax_modems_set_tx_handler(s, (span_tx_handler_t) &v27ter_tx, &s->fast_modems.v27ter_tx);
fax_modems_set_next_tx_handler(s, (span_tx_handler_t) NULL, NULL);
break;
case FAX_MODEM_V29_TX:
v29_tx_restart(&s->fast_modems.v29_tx, s->bit_rate, s->use_tep);
v29_tx_set_get_bit(&s->fast_modems.v29_tx, get_bit, get_bit_user_data);
fax_modems_set_tx_handler(s, (span_tx_handler_t) &v29_tx, &s->fast_modems.v29_tx);
fax_modems_set_next_tx_handler(s, (span_tx_handler_t) NULL, NULL);
break;
case FAX_MODEM_V17_TX:
v17_tx_restart(&s->fast_modems.v17_tx, s->bit_rate, s->use_tep, s->short_train);
v17_tx_set_get_bit(&s->fast_modems.v17_tx, get_bit, get_bit_user_data);
fax_modems_set_tx_handler(s, (span_tx_handler_t) &v17_tx, &s->fast_modems.v17_tx);
fax_modems_set_next_tx_handler(s, (span_tx_handler_t) NULL, NULL);
break;
}
/*endswitch*/
}
/*endif*/
}
static void fax_set_rx_type(void *user_data, int type, int short_train, int use_hdlc)
{
fax_state_t *s;
put_bit_func_t put_bit_func;
void *put_bit_user_data;
s = (fax_state_t *) user_data;
span_log(&s->logging, SPAN_LOG_FLOW, "Set rx type %d\n", type);
if (s->current_rx_type == type)
return;
s->current_rx_type = type;
if (use_hdlc)
{
put_bit_func = (put_bit_func_t) hdlc_rx_put_bit;
put_bit_user_data = (void *) &(s->hdlcrx);
hdlc_rx_init(&(s->hdlcrx), FALSE, FALSE, 5, t30_hdlc_accept, &(s->t30_state));
}
else
{
put_bit_func = t30_non_ecm_put_bit;
put_bit_user_data = (void *) &(s->t30_state);
}
switch (type)
{
case T30_MODEM_V21:
if (s->flush_handler)
s->flush_handler(s, s->flush_user_data, 3);
fsk_rx_init(&(s->v21rx), &preset_fsk_specs[FSK_V21CH2], TRUE, (put_bit_func_t) hdlc_rx_put_bit, put_bit_user_data);
fsk_rx_signal_cutoff(&(s->v21rx), -45.5);
s->rx_handler = (span_rx_handler_t *) &fsk_rx;
s->rx_user_data = &(s->v21rx);
break;
case T30_MODEM_V27TER_2400:
v27ter_rx_restart(&(s->v27ter_rx), 2400, FALSE);
v27ter_rx_set_put_bit(&(s->v27ter_rx), put_bit_func, put_bit_user_data);
s->rx_handler = (span_rx_handler_t *) &early_v27ter_rx;
s->rx_user_data = s;
break;
case T30_MODEM_V27TER_4800:
v27ter_rx_restart(&(s->v27ter_rx), 4800, FALSE);
v27ter_rx_set_put_bit(&(s->v27ter_rx), put_bit_func, put_bit_user_data);
s->rx_handler = (span_rx_handler_t *) &early_v27ter_rx;
s->rx_user_data = s;
break;
case T30_MODEM_V29_7200:
v29_rx_restart(&(s->v29rx), 7200, FALSE);
v29_rx_set_put_bit(&(s->v29rx), put_bit_func, put_bit_user_data);
s->rx_handler = (span_rx_handler_t *) &early_v29_rx;
s->rx_user_data = s;
break;
case T30_MODEM_V29_9600:
v29_rx_restart(&(s->v29rx), 9600, FALSE);
v29_rx_set_put_bit(&(s->v29rx), put_bit_func, put_bit_user_data);
s->rx_handler = (span_rx_handler_t *) &early_v29_rx;
s->rx_user_data = s;
break;
case T30_MODEM_V17_7200:
v17_rx_restart(&(s->v17rx), 7200, short_train);
v17_rx_set_put_bit(&(s->v17rx), put_bit_func, put_bit_user_data);
s->rx_handler = (span_rx_handler_t *) &early_v17_rx;
s->rx_user_data = s;
break;
case T30_MODEM_V17_9600:
v17_rx_restart(&(s->v17rx), 9600, short_train);
v17_rx_set_put_bit(&(s->v17rx), put_bit_func, put_bit_user_data);
s->rx_handler = (span_rx_handler_t *) &early_v17_rx;
s->rx_user_data = s;
break;
case T30_MODEM_V17_12000:
v17_rx_restart(&(s->v17rx), 12000, short_train);
v17_rx_set_put_bit(&(s->v17rx), put_bit_func, put_bit_user_data);
s->rx_handler = (span_rx_handler_t *) &early_v17_rx;
s->rx_user_data = s;
break;
case T30_MODEM_V17_14400:
v17_rx_restart(&(s->v17rx), 14400, short_train);
v17_rx_set_put_bit(&(s->v17rx), put_bit_func, put_bit_user_data);
s->rx_handler = (span_rx_handler_t *) &early_v17_rx;
s->rx_user_data = s;
break;
case T30_MODEM_DONE:
span_log(&s->logging, SPAN_LOG_FLOW, "FAX exchange complete\n");
default:
s->rx_handler = (span_rx_handler_t *) &dummy_rx;
s->rx_user_data = s;
break;
}
}
