void
RTP::process_dtmf_rfc2833() {
unsigned int seqno = getSeqNum();
unsigned int event, event_end, samples;
char resp = 0;
unsigned int timestamp = getTimestamp();
unsigned char *pdata = data + sizeof(RTPFixedHeader);
/* Figure out event, event end, and samples */
event = ntohl(*((unsigned int *)(pdata)));
event >>= 24;
event_end = ntohl(*((unsigned int *)(pdata)));
event_end <<= 8;
event_end >>= 24;
samples = ntohl(*((unsigned int *)(pdata)));
samples &= 0xFFFF;
if(dtmfdebug) syslog(LOG_ERR, "Got RTP RFC2833 from %u (seq %-6.6u, ts %-6.6u, len %-6.6u, mark %d, event %08x, end %d, duration %-5.5d) \n",
getMarker(), seqno, timestamp, len, (getMarker()?1:0), event, ((event_end & 0x80)?1:0), samples);
/* Figure out what digit was pressed */
if (event < 10) {
resp = '0' + event;
} else if (event < 11) {
resp = '*';
} else if (event < 12) {
resp = '#';
} else if (event < 16) {
resp = 'A' + (event - 12);
} else if (event < 17) { /* Event 16: Hook flash */
resp = 'X';
} else {
/* Not a supported event */
//syslog(LOG_ERR, "Ignoring RTP 2833 Event: %08x. Not a DTMF Digit.\n", event);
return;
}
if ((last_end_timestamp != timestamp) || (lastdtmf && lastdtmf != resp)) {
lastdtmf = resp;
if(dtmfdebug) syslog(LOG_ERR, "dtmfevent %c\n", resp);
last_end_timestamp = timestamp;
Call *owner = (Call*)call_owner;
if(owner) {
owner->handle_dtmf(resp, ts2double(header->ts.tv_sec, header->ts.tv_usec), saddr, daddr);
}
}
return;
}
