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modularize payload type matching exceptions in offer/answer

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This commit is contained in:
Simon Morlat 2015-01-17 11:58:46 +01:00
parent 546b953c5d
commit 55973deb0e
2 changed files with 97 additions and 30 deletions
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125
coreapi/offeranswer.c
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@ -31,7 +31,50 @@ static bool_t only_telephone_event(const MSList *l){
return TRUE;
}
static PayloadType * find_payload_type_best_match(const MSList *l, const PayloadType *refpt){
typedef struct _PayloadTypeMatcher{
const char *mime_type;
PayloadType *(*match_func)(const MSList *l, const PayloadType *refpt);
}PayloadTypeMatcher;
static PayloadType * opus_match(const MSList *l, const PayloadType *refpt){
PayloadType *pt;
const MSList *elem;
PayloadType *candidate=NULL;
for (elem=l;elem!=NULL;elem=elem->next){
pt=(PayloadType*)elem->data;
/*workaround a bug in earlier versions of linphone where opus/48000/1 is offered, which is uncompliant with opus rtp draft*/
if (strcasecmp(pt->mime_type,"opus")==0 ){
if (refpt->channels==1){
pt->channels=1; /*so that we respond with same number of channels */
candidate=pt;
}else if (refpt->channels==2){
return pt;
}
}
}
return candidate;
}
/* the reason for this matcher is for some stupid uncompliant phone that offer G729a mime type !*/
static PayloadType * g729A_match(const MSList *l, const PayloadType *refpt){
PayloadType *pt;
const MSList *elem;
PayloadType *candidate=NULL;
for (elem=l;elem!=NULL;elem=elem->next){
pt=(PayloadType*)elem->data;
/*workaround a bug in earlier versions of linphone where opus/48000/1 is offered, which is uncompliant with opus rtp draft*/
if (strcasecmp(pt->mime_type,"G729")==0 && refpt->channels==pt->channels){
candidate=pt;
}
}
return candidate;
}
static PayloadType * amr_match(const MSList *l, const PayloadType *refpt){
PayloadType *pt;
char value[10];
const MSList *elem;
@ -40,39 +83,63 @@ static PayloadType * find_payload_type_best_match(const MSList *l, const Payload
for (elem=l;elem!=NULL;elem=elem->next){
pt=(PayloadType*)elem->data;
/*workaround a bug in earlier versions of linphone where opus/48000/1 is offered, which is uncompliant with opus rtp draft*/
if (refpt->mime_type && strcasecmp(refpt->mime_type,"opus")==0 && refpt->channels==1
&& strcasecmp(pt->mime_type,refpt->mime_type)==0){
pt->channels=1; /*so that we respond with same number of channels */
candidate=pt;
break;
}
/* the compare between G729 and G729A is for some stupid uncompliant phone*/
if ( pt->mime_type && refpt->mime_type &&
(strcasecmp(pt->mime_type,refpt->mime_type)==0 ||
(strcasecmp(pt->mime_type, "G729") == 0 && strcasecmp(refpt->mime_type, "G729A") == 0 ))
&& pt->clock_rate==refpt->clock_rate && pt->channels==refpt->channels){
candidate=pt;
/*good candidate, check fmtp for H264 */
if (strcasecmp(pt->mime_type,"H264")==0){
if (pt->recv_fmtp!=NULL && refpt->recv_fmtp!=NULL){
int mode1=0,mode2=0;
if (fmtp_get_value(pt->recv_fmtp,"packetization-mode",value,sizeof(value))){
mode1=atoi(value);
}
if (fmtp_get_value(refpt->recv_fmtp,"packetization-mode",value,sizeof(value))){
mode2=atoi(value);
}
if (mode1==mode2)
break; /*exact match */
}
}else break;
if ( pt->mime_type && refpt->mime_type
&& strcasecmp(pt->mime_type, refpt->mime_type)==0
&& pt->clock_rate==refpt->clock_rate
&& pt->channels==refpt->channels) {
int octedalign1=0,octedalign2=0;
if (pt->recv_fmtp!=NULL && fmtp_get_value(pt->recv_fmtp,"octet-align",value,sizeof(value))){
octedalign1=atoi(value);
}
if (refpt->send_fmtp!=NULL && fmtp_get_value(refpt->send_fmtp,"octet-align",value,sizeof(value))){
octedalign2=atoi(value);
}
if (octedalign1==octedalign2) {
candidate=pt;
break; /*exact match */
}
}
}
return candidate;
}
static PayloadType * generic_match(const MSList *l, const PayloadType *refpt){
PayloadType *pt;
const MSList *elem;
for (elem=l;elem!=NULL;elem=elem->next){
pt=(PayloadType*)elem->data;
if ( pt->mime_type && refpt->mime_type
&& strcasecmp(pt->mime_type, refpt->mime_type)==0
&& pt->clock_rate==refpt->clock_rate
&& pt->channels==refpt->channels)
return pt;
}
return NULL;
}
static PayloadTypeMatcher matchers[]={
{"opus", opus_match},
{"G729A", g729A_match},
{"AMR", amr_match},
{"AMR-WB", amr_match},
{NULL, NULL}
};
static PayloadType * find_payload_type_best_match(const MSList *l, const PayloadType *refpt){
PayloadTypeMatcher *m;
for(m=matchers;m->mime_type!=NULL;++m){
if (refpt->mime_type && strcasecmp(m->mime_type,refpt->mime_type)==0){
return m->match_func(l,refpt);
}
}
return generic_match(l,refpt);
}
static MSList *match_payloads(const MSList *local, const MSList *remote, bool_t reading_response, bool_t one_matching_codec){
const MSList *e2,*e1;
MSList *res=NULL;

2
mediastreamer2

@ -1 +1 @@
Subproject commit 0450c04a38ce2c78430208d90e41dbe23163b950
Subproject commit 81e6bd5511c16133df340e732807d64faac1f7b2