PayloadType * rtp_profile_find_payload(RtpProfile *prof,const char *mime,int rate,int channels)
{
int i;
i=rtp_profile_find_payload_number(prof,mime,rate,channels);
if (i>=0) return rtp_profile_get_payload(prof,i);
return NULL;
}
static void process_cn(MSFilter *f, SenderData *d){
if (d->cng_data.datasize>0){
rtp_header_t *rtp;
/* get CN payload type number */
int cn_pt=rtp_profile_find_payload_number(d->session->snd.profile, "CN", 8000, 1);
/* create the packet, payload type number is the one used for current codec */
mblk_t *m=rtp_session_create_packet(d->session, 12, d->cng_data.data, d->cng_data.datasize);
/* replace payload type in RTP header */
rtp=(rtp_header_t*)m->b_rptr;
rtp->paytype = cn_pt;
rtp_session_sendm_with_ts(d->session,m,d->last_ts);
d->cng_data.datasize=0;
}
}
/**
* Allocates a new rtp packet to be used to add named telephony events. The application can use
* then rtp_session_add_telephone_event() to add named events to the packet.
* Finally the packet has to be sent with rtp_session_sendm_with_ts().
*
* @param session a rtp session.
* @param start boolean to indicate if the marker bit should be set.
*
* @return a message block containing the rtp packet if successfull, NULL if the rtp session
* cannot support telephony event (because the rtp profile it is bound to does not include
* a telephony event payload type).
**/
mblk_t *rtp_session_create_telephone_event_packet(RtpSession *session, int start)
{
mblk_t *mp;
rtp_header_t *rtp;
PayloadType *cur_pt=rtp_profile_get_payload(session->snd.profile, rtp_session_get_send_payload_type(session));
int tev_pt = session->tev_send_pt;
if (tev_pt != -1){
PayloadType *cur_tev_pt=rtp_profile_get_payload(session->snd.profile, tev_pt);
if (!cur_tev_pt){
ortp_error("Undefined telephone-event payload type %i choosen for sending telephone event", tev_pt);
tev_pt = -1;
}else if (cur_pt && cur_tev_pt->clock_rate != cur_pt->clock_rate){
ortp_warning("Telephone-event payload type %i has clockrate %i while main audio codec has clockrate %i: this is not permitted.",
tev_pt, cur_tev_pt->clock_rate, cur_pt->clock_rate);
}
}
if (tev_pt == -1){
tev_pt = rtp_profile_find_payload_number(session->snd.profile, "telephone-event", cur_pt ? cur_pt->clock_rate : 8000, 1);
}
return_val_if_fail(tev_pt!=-1,NULL);
mp=allocb(RTP_FIXED_HEADER_SIZE+TELEPHONY_EVENTS_ALLOCATED_SIZE,BPRI_MED);
if (mp==NULL) return NULL;
rtp=(rtp_header_t*)mp->b_rptr;
rtp->version = 2;
rtp->markbit=start;
rtp->padbit = 0;
rtp->extbit = 0;
rtp->cc = 0;
rtp->ssrc = session->snd.ssrc;
/* timestamp set later, when packet is sended */
/*seq number set later, when packet is sended */
/*set the payload type */
rtp->paytype=tev_pt;
/*copy the payload */
mp->b_wptr+=RTP_FIXED_HEADER_SIZE;
return mp;
}
int rtp_profile_get_payload_number_from_rtpmap(RtpProfile *profile,const char *rtpmap)
{
int clock_rate, channels, ret;
char* subtype = ortp_strdup( rtpmap );
char* rate_str = NULL;
char* chan_str = NULL;
/* find the slash after the subtype */
rate_str = strchr(subtype, '/');
if (rate_str && strlen(rate_str)>1) {
*rate_str = 0;
rate_str++;
/* Look for another slash */
chan_str = strchr(rate_str, '/');
if (chan_str && strlen(chan_str)>1) {
*chan_str = 0;
chan_str++;
} else {
chan_str = NULL;
}
} else {
rate_str = NULL;
}
// Use default clock rate if none given
if (rate_str) clock_rate = atoi(rate_str);
else clock_rate = 8000;
// Use default number of channels if none given
if (chan_str) channels = atoi(chan_str);
else channels = -1;
//printf("Searching for payload %s at freq %i with %i channels\n",subtype,clock_rate,ch1annels);
ret=rtp_profile_find_payload_number(profile,subtype,clock_rate,channels);
ortp_free(subtype);
return ret;
}
