SPAN_DECLARE(void) fax_modems_start_slow_modem(fax_modems_state_t *s, int which)
{
switch (which)
{
case FAX_MODEM_V21_RX:
fsk_rx_init(&s->v21_rx, &preset_fsk_specs[FSK_V21CH2], FSK_FRAME_MODE_SYNC, (put_bit_func_t) hdlc_rx_put_bit, &s->hdlc_rx);
fax_modems_set_rx_handler(s, (span_rx_handler_t) &fsk_rx, &s->v21_rx, (span_rx_fillin_handler_t) &fsk_rx_fillin, &s->v21_rx);
fsk_rx_signal_cutoff(&s->v21_rx, -39.09f);
s->rx_frame_received = false;
break;
case FAX_MODEM_CED_TONE_RX:
modem_connect_tones_rx_init(&s->connect_rx, MODEM_CONNECT_TONES_FAX_CED, s->tone_callback, s->tone_callback_user_data);
fax_modems_set_rx_handler(s, (span_rx_handler_t) &modem_connect_tones_rx, &s->connect_rx, (span_rx_fillin_handler_t) &modem_connect_tones_rx_fillin, &s->connect_rx);
break;
case FAX_MODEM_CNG_TONE_RX:
modem_connect_tones_rx_init(&s->connect_rx, MODEM_CONNECT_TONES_FAX_CNG, s->tone_callback, s->tone_callback_user_data);
fax_modems_set_rx_handler(s, (span_rx_handler_t) &modem_connect_tones_rx, &s->connect_rx, (span_rx_fillin_handler_t) &modem_connect_tones_rx_fillin, &s->connect_rx);
break;
case FAX_MODEM_V21_TX:
fsk_tx_init(&s->v21_tx, &preset_fsk_specs[FSK_V21CH2], (get_bit_func_t) hdlc_tx_get_bit, &s->hdlc_tx);
fax_modems_set_tx_handler(s, (span_tx_handler_t) &fsk_tx, &s->v21_tx);
fax_modems_set_next_tx_handler(s, (span_tx_handler_t) NULL, NULL);
break;
case FAX_MODEM_CED_TONE_TX:
modem_connect_tones_tx_init(&s->connect_tx, MODEM_CONNECT_TONES_FAX_CED);
fax_modems_set_tx_handler(s, (span_tx_handler_t) &modem_connect_tones_tx, &s->connect_tx);
fax_modems_set_next_tx_handler(s, (span_tx_handler_t) NULL, NULL);
break;
case FAX_MODEM_CNG_TONE_TX:
modem_connect_tones_tx_init(&s->connect_tx, MODEM_CONNECT_TONES_FAX_CNG);
fax_modems_set_tx_handler(s, (span_tx_handler_t) &modem_connect_tones_tx, &s->connect_tx);
fax_modems_set_next_tx_handler(s, (span_tx_handler_t) NULL, NULL);
break;
}
}
SPAN_DECLARE(fax_modems_state_t *) fax_modems_init(fax_modems_state_t *s,
int use_tep,
hdlc_frame_handler_t hdlc_accept,
hdlc_underflow_handler_t hdlc_tx_underflow,
put_bit_func_t non_ecm_put_bit,
get_bit_func_t non_ecm_get_bit,
tone_report_func_t tone_callback,
void *user_data)
{
if (s == NULL)
{
if ((s = (fax_modems_state_t *) span_alloc(sizeof(*s))) == NULL)
return NULL;
}
/*endif*/
memset(s, 0, sizeof(*s));
s->use_tep = use_tep;
modem_connect_tones_tx_init(&s->connect_tx, MODEM_CONNECT_TONES_FAX_CNG);
span_log_init(&s->logging, SPAN_LOG_NONE, NULL);
span_log_set_protocol(&s->logging, "FAX modems");
s->tone_callback = tone_callback;
s->tone_callback_user_data = user_data;
if (tone_callback)
{
modem_connect_tones_rx_init(&s->connect_rx,
MODEM_CONNECT_TONES_FAX_CNG,
s->tone_callback,
s->tone_callback_user_data);
}
/*endif*/
dc_restore_init(&s->dc_restore);
s->get_bit = non_ecm_get_bit;
s->get_bit_user_data = user_data;
s->put_bit = non_ecm_put_bit;
s->put_bit_user_data = user_data;
s->hdlc_accept = hdlc_accept;
s->hdlc_accept_user_data = user_data;
hdlc_rx_init(&s->hdlc_rx, false, false, HDLC_FRAMING_OK_THRESHOLD, fax_modems_hdlc_accept, s);
hdlc_tx_init(&s->hdlc_tx, false, 2, false, hdlc_tx_underflow, user_data);
fax_modems_start_slow_modem(s, FAX_MODEM_V21_RX);
fsk_tx_init(&s->v21_tx, &preset_fsk_specs[FSK_V21CH2], (get_bit_func_t) hdlc_tx_get_bit, &s->hdlc_tx);
silence_gen_init(&s->silence_gen, 0);
s->rx_signal_present = false;
s->rx_handler = (span_rx_handler_t) &span_dummy_rx;
s->rx_fillin_handler = (span_rx_fillin_handler_t) &span_dummy_rx;
s->rx_user_data = NULL;
s->rx_fillin_user_data = NULL;
s->tx_handler = (span_tx_handler_t) &silence_gen;
s->tx_user_data = &s->silence_gen;
return s;
}
SPAN_DECLARE(fax_modems_state_t *) fax_modems_init(fax_modems_state_t *s,
int use_tep,
hdlc_frame_handler_t hdlc_accept,
hdlc_underflow_handler_t hdlc_tx_underflow,
put_bit_func_t non_ecm_put_bit,
get_bit_func_t non_ecm_get_bit,
tone_report_func_t tone_callback,
void *user_data)
{
if (s == NULL)
{
if ((s = (fax_modems_state_t *) malloc(sizeof(*s))) == NULL)
return NULL;
}
memset(s, 0, sizeof(*s));
s->use_tep = use_tep;
hdlc_rx_init(&s->hdlc_rx, FALSE, FALSE, HDLC_FRAMING_OK_THRESHOLD, hdlc_accept, user_data);
hdlc_tx_init(&s->hdlc_tx, FALSE, 2, FALSE, hdlc_tx_underflow, user_data);
fsk_rx_init(&s->v21_rx, &preset_fsk_specs[FSK_V21CH2], TRUE, (put_bit_func_t) hdlc_rx_put_bit, &s->hdlc_rx);
fsk_rx_signal_cutoff(&s->v21_rx, -39.09f);
fsk_tx_init(&s->v21_tx, &preset_fsk_specs[FSK_V21CH2], (get_bit_func_t) hdlc_tx_get_bit, &s->hdlc_tx);
v17_rx_init(&s->v17_rx, 14400, non_ecm_put_bit, user_data);
v17_tx_init(&s->v17_tx, 14400, s->use_tep, non_ecm_get_bit, user_data);
v29_rx_init(&s->v29_rx, 9600, non_ecm_put_bit, user_data);
v29_rx_signal_cutoff(&s->v29_rx, -45.5f);
v29_tx_init(&s->v29_tx, 9600, s->use_tep, non_ecm_get_bit, user_data);
v27ter_rx_init(&s->v27ter_rx, 4800, non_ecm_put_bit, user_data);
v27ter_tx_init(&s->v27ter_tx, 4800, s->use_tep, non_ecm_get_bit, user_data);
silence_gen_init(&s->silence_gen, 0);
modem_connect_tones_tx_init(&s->connect_tx, MODEM_CONNECT_TONES_FAX_CNG);
if (tone_callback)
{
modem_connect_tones_rx_init(&s->connect_rx,
MODEM_CONNECT_TONES_FAX_CNG,
tone_callback,
user_data);
}
dc_restore_init(&s->dc_restore);
s->rx_signal_present = FALSE;
s->rx_handler = (span_rx_handler_t *) &span_dummy_rx;
s->rx_user_data = NULL;
s->tx_handler = (span_tx_handler_t *) &silence_gen;
s->tx_user_data = &s->silence_gen;
return s;
}
static int non_v8_calls_v8_tests(SNDFILE *outhandle)
{
silence_gen_state_t *non_v8_caller_tx;
modem_connect_tones_rx_state_t *non_v8_caller_rx;
v8_state_t *v8_answerer;
logging_state_t *answerer_logging;
int answerer_available_modulations;
int i;
int samples;
int remnant;
int outframes;
int tone;
int16_t amp[SAMPLES_PER_CHUNK];
int16_t out_amp[2*SAMPLES_PER_CHUNK];
v8_parms_t v8_answer_parms;
answerer_available_modulations = V8_MOD_V17
| V8_MOD_V21
| V8_MOD_V22
| V8_MOD_V23HDX
| V8_MOD_V23
| V8_MOD_V26BIS
| V8_MOD_V26TER
| V8_MOD_V27TER
| V8_MOD_V29
| V8_MOD_V32
| V8_MOD_V34HDX
| V8_MOD_V34
| V8_MOD_V90
| V8_MOD_V92;
negotiations_ok = 0;
non_v8_caller_tx = silence_gen_init(NULL, 10*SAMPLE_RATE);
non_v8_caller_rx = modem_connect_tones_rx_init(NULL, MODEM_CONNECT_TONES_ANS_PR, NULL, NULL);
v8_answer_parms.modem_connect_tone = MODEM_CONNECT_TONES_ANSAM_PR;
v8_answer_parms.send_ci = true;
v8_answer_parms.v92 = -1;
v8_answer_parms.call_function = V8_CALL_V_SERIES;
v8_answer_parms.modulations = answerer_available_modulations;
v8_answer_parms.protocol = V8_PROTOCOL_LAPM_V42;
v8_answer_parms.pcm_modem_availability = 0;
v8_answer_parms.pstn_access = 0;
v8_answer_parms.nsf = -1;
v8_answer_parms.t66 = -1;
v8_answerer = v8_init(NULL,
false,
&v8_answer_parms,
handler,
(void *) "answerer");
answerer_logging = v8_get_logging_state(v8_answerer);
span_log_set_level(answerer_logging, SPAN_LOG_FLOW | SPAN_LOG_SHOW_TAG | SPAN_LOG_SHOW_SAMPLE_TIME);
span_log_set_tag(answerer_logging, "answerer");
for (i = 0; i < 1000; i++)
{
samples = silence_gen(non_v8_caller_tx, amp, SAMPLES_PER_CHUNK);
if (samples < SAMPLES_PER_CHUNK)
{
vec_zeroi16(amp + samples, SAMPLES_PER_CHUNK - samples);
samples = SAMPLES_PER_CHUNK;
}
/*endif*/
remnant = v8_rx(v8_answerer, amp, samples);
if (remnant)
break;
/*endif*/
for (i = 0; i < samples; i++)
out_amp[2*i] = amp[i];
/*endfor*/
samples = v8_tx(v8_answerer, amp, SAMPLES_PER_CHUNK);
if (samples < SAMPLES_PER_CHUNK)
{
vec_zeroi16(amp + samples, SAMPLES_PER_CHUNK - samples);
samples = SAMPLES_PER_CHUNK;
}
/*endif*/
span_log_bump_samples(answerer_logging, samples);
modem_connect_tones_rx(non_v8_caller_rx, amp, samples);
if ((tone = modem_connect_tones_rx_get(non_v8_caller_rx)) != MODEM_CONNECT_TONES_NONE)
{
printf("Detected %s (%d)\n", modem_connect_tone_to_str(tone), tone);
if (tone == MODEM_CONNECT_TONES_ANSAM_PR)
negotiations_ok++;
/*endif*/
}
/*endif*/
for (i = 0; i < samples; i++)
out_amp[2*i + 1] = amp[i];
/*endfor*/
if (outhandle)
{
outframes = sf_writef_short(outhandle, out_amp, samples);
if (outframes != samples)
{
fprintf(stderr, " Error writing audio file\n");
exit(2);
}
/*endif*/
}
/*endif*/
}
/*endfor*/
silence_gen_free(non_v8_caller_tx);
modem_connect_tones_rx_free(non_v8_caller_rx);
v8_free(v8_answerer);
if (negotiations_ok != 1)
{
printf("Tests failed.\n");
exit(2);
}
/*endif*/
return 0;
}
