static switch_bool_t inband_dtmf_callback(switch_media_bug_t *bug, void *user_data, switch_abc_type_t type)
{
switch_inband_dtmf_t *pvt = (switch_inband_dtmf_t *) user_data;
switch_frame_t *frame = NULL;
switch (type) {
case SWITCH_ABC_TYPE_INIT: {
pvt->dtmf_detect = dtmf_rx_init(NULL, NULL, NULL);
dtmf_rx_parms(pvt->dtmf_detect, pvt->filter_dialtone, pvt->twist, pvt->reverse_twist, pvt->threshold);
dtmf_rx_set_realtime_callback(pvt->dtmf_detect, spandsp_dtmf_rx_realtime_callback, pvt);
break;
}
case SWITCH_ABC_TYPE_CLOSE:
if (pvt->dtmf_detect) {
dtmf_rx_free(pvt->dtmf_detect);
}
break;
case SWITCH_ABC_TYPE_READ_REPLACE:
if ((frame = switch_core_media_bug_get_read_replace_frame(bug))) {
dtmf_rx(pvt->dtmf_detect, frame->data, frame->samples);
switch_core_media_bug_set_read_replace_frame(bug, frame);
}
break;
case SWITCH_ABC_TYPE_WRITE:
default:
break;
}
return SWITCH_TRUE;
}
void SpanDtmfProbe()
{
std::string dtmfCode = "*1234567890#ABCD";
iDSP::DtmfGeneratorProfile prof;
prof.Level = 0;
prof.DurationMs = 80; // 70 мало
prof.PauseMs = 40; // 50 20-мало
iDSP::DtmfGenerator gen;
gen.Add(dtmfCode);
// Init:
digits_rx_callback_t callback = 0;//EvDigitDetected;
void* pUserData = 0;
dtmf_rx_state_t state;
dtmf_rx_state_t* pState = &state;
dtmf_rx_init(pState, callback, pUserData);
// Adjust detector:
bool rej350_440 = false;
int fwTwist = 8; //8 Db максимальная разница уровней частот в комбинации
int revTwist = 8; //-4 Db ?
int threshold = -26; //Db минимальный уровень сигнала
dtmf_rx_parms(pState, rej350_440, fwTwist, revTwist, threshold);
while (gen.RestSampleCount() != 0)
{
int16_t sample = gen.NextSample();
dtmf_rx(pState, &sample, 1);
}
const int CMaxSymbols = 100;
char dtmfCodeRx[CMaxSymbols];
int size = dtmf_rx_get(pState, dtmfCodeRx, CMaxSymbols);
TUT_ASSERT(size == dtmfCode.size());
dtmfCodeRx[size] = '\0';
TUT_ASSERT(dtmfCode == dtmfCodeRx);
// delete pState;
//dtmf_rx_free(pState);
//pState = 0;
}
