[SR-Users] SDPOPs questions

[Gerry | Rigatta]

Hi,

The behaviour of the sdpops module is not fully clear to me. 

Lets say in the INVITE contains in the m= line the payloads 0 99 but has no a= line for codec 0 / PCMU, Would the sdp_keep_codecs_by_name(“PCMU”) keep PCMU ?

What about the case that the INVITE contains in the m=line only the payload 99 but shows an additional a=line for codec 0 / PCMU. Would the sdp_keep_codecs_by_name(“PCMU”) keep PCMU ? If yes, would the extra mtype parameter prevent that? e.g. sdp_keep_codecs_by_name(“PCMU”, mtype) 

What happens when several m= lines are present? Does sdp_keep_codecs_by_name consider all m=lines ? Are the treated separately?

What happens to payloads which are not in the hard-coded list in sdpops_data.c ? Can they be used with the sdpops functions?

Thanks for your hints.

Best Gerry


codecsmap_t sdpops_codecsmap_table[] = {
	{ {"PCMU",  4},  {"0",         1} },
	{ {"GSM",   3},  {"3",         1} },
	{ {"G723",  4},  {"4",         1} },
	{ {"DVI4",  4},  {"5,6,16,17", 9} },
	{ {"LPC",   3},  {"7",         1} },
	{ {"PCMA",  4},  {"8",         1} },
	{ {"G722",  4},  {"9",         1} },
	{ {"L16",   3},  {"10,11",     5} },
	{ {"QCELP", 5},  {"12",        2} },
	{ {"CN",    2},  {"13",        5} },
	{ {"MPA",   3},  {"14",        2} },
	{ {"G728",  4},  {"15",        2} },
	{ {"G729",  4},  {"18",        2} },
	{ {0, 0}, {0, 0} }
};