Hallo All ,
WRT the Pjsip archives and with all respect to the fact that ptime attribute
is not designed to be a codec specific attribute and shall be deemed a
global one characterizing the entire m-line Offer plus the commercial
implementations conflict ( Guidance.att VS Obligatory.att ) I have an
urgent call for this attribute to be explicitly declared because our
switches preserve it in 183 & 200 OK responses as well as fully respect it
when packetizing the downstream frames and in this way the explicit
declaration will be very helpful when using satellite links . Over satellite
links I have no way but to deliver multiple audio frames in a single RTP
packet to save BW .
My Configuration :
1. Only GSM and HW G729 ( VAS Direct ) are enabled ( Still G729 not
appearing in my SDP offer and trying to solve it in separate Thread ) .
2. Frames per packet parameter has been doubled .
3. The following code has been added in pjmedia/src/pjmedia/endpoint.c
.
/* Add sendrecv attribute. */
attr = PJ_POOL_ZALLOC_T(pool, pjmedia_sdp_attr);
attr->name = STR_SENDRECV;
m->attr[m->attr_count++] = attr;
+++++++++++++Begin Code+++++++++++
/* Add Ptime attribute. */
attr = PJ_POOL_ZALLOC_T(pool, pjmedia_sdp_attr);
attr->name = pj_str("ptime");
pj_ansi_sprintf(tmp_param,"%d",(int)codec_param.info.frm_ptime*
(int)codec_param.info.frm_per_pkt);
attr->value = pj_strdup3(pool, tmp_param);
m->attr[m->attr_count++] = attr;
++++++++++++ End Code++++++++++++
Unfortunately nothing changed in the SDP offer after clean and rebuild .
I'm just C++ beginner and really your help is highly appreciated .
BR
JK
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