SPAN_DECLARE(int) fax_modems_v29_v21_rx_fillin(void *user_data, int len)
{
fax_modems_state_t *s;
s = (fax_modems_state_t *) user_data;
v29_rx_fillin(&s->v29_rx, len);
fsk_rx_fillin(&s->v21_rx, len);
return 0;
}
SPAN_DECLARE_NONSTD(int) fax_modems_v27ter_v21_rx_fillin(void *user_data, int len)
{
fax_modems_state_t *s;
s = (fax_modems_state_t *) user_data;
v27ter_rx_fillin(&s->fast_modems.v27ter_rx, len);
fsk_rx_fillin(&s->v21_rx, len);
return 0;
}
static int v29_v21_rx_fillin(void *user_data, int len)
{
fax_state_t *t;
fax_modems_state_t *s;
t = (fax_state_t *) user_data;
s = &t->modems;
v29_rx_fillin(&s->v29_rx, len);
fsk_rx_fillin(&s->v21_rx, len);
return 0;
}
SPAN_DECLARE(int) fax_rx_fillin(fax_state_t *s, int len)
{
/* To mitigate the effect of lost packets on a packet network we should
try to sustain the status quo. If there is no receive modem running, keep
things that way. If there is a receive modem running, try to sustain its
operation, without causing a phase hop, or letting its adaptive functions
diverge. */
#if defined(LOG_FAX_AUDIO)
if (s->modems.audio_rx_log >= 0)
{
int i;
#if defined(_MSC_VER)
int16_t *amp = (int16_t *) _alloca(sizeof(int16_t)*len);
#else
int16_t amp[len];
#endif
vec_zeroi16(amp, len);
write(s->modems.audio_rx_log, amp, len*sizeof(int16_t));
}
#endif
t30_timer_update(&s->t30, len);
/* Call the fillin function of the current modem (if there is one). */
switch (s->modems.current_rx_type)
{
case T30_MODEM_V21:
len = fsk_rx_fillin(&s->modems.v21_rx, len);
break;
case T30_MODEM_V27TER:
/* TODO: what about FSK in the early stages */
len = v27ter_rx_fillin(&s->modems.v27ter_rx, len);
break;
case T30_MODEM_V29:
/* TODO: what about FSK in the early stages */
len = v29_rx_fillin(&s->modems.v29_rx, len);
break;
case T30_MODEM_V17:
/* TODO: what about FSK in the early stages */
len = v17_rx_fillin(&s->modems.v17_rx, len);
break;
}
return len;
}