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sdp parser ready.

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This commit is contained in:
Simon Morlat 2010-01-20 15:29:19 +01:00
parent 435c09a431
commit 2848c5617c
2 changed files with 114 additions and 6 deletions
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12
linphone/coreapi/sal.h
View file

@ -50,19 +50,29 @@ typedef enum {
SAL_OTHER
} SalStreamType;
typedef enum{
SAL_PROTO_UNKNOWN,
SAL_PROTO_RTP_AVP,
SAL_PROTO_RTP_SAVP
}SalMediaProto;
typedef struct SalStreamDescription{
SalMediaProto proto;
SalStreamType type;
char addr[64];
int port;
MSList *payloads; //<list of PayloadType
int bandwidth;
int ptime;
} SalStreamDescription;
#define SAL_MEDIA_DESCRIPTION_MAX_STREAMS 4
typedef struct SalMediaDescription{
char addr[64];
char username[64];
int nstreams;
SalStreamDescription streams[2];
SalStreamDescription streams[SAL_MEDIA_DESCRIPTION_MAX_STREAMS];
} SalMediaDescription;
void sal_media_description_free(SalMediaDescription *md);

108
linphone/coreapi/sal_eXosip2_sdp.c
View file

@ -48,14 +48,14 @@ static void add_relay_info(sdp_message_t *sdp, int mline, const char *relay, con
#endif
char * int_2char(int a){
static char * int_2char(int a){
char *p=osip_malloc(16);
snprintf(p,16,"%i",a);
return p;
}
/* return the value of attr "field" for payload pt at line pos (field=rtpmap,fmtp...)*/
char *sdp_message_a_attr_value_get_with_pt(sdp_message_t *sdp,int pos,int pt,const char *field)
static const char *sdp_message_a_attr_value_get_with_pt(sdp_message_t *sdp,int pos,int pt,const char *field)
{
int i,tmppt=0,scanned=0;
char *tmp;
@ -76,8 +76,9 @@ char *sdp_message_a_attr_value_get_with_pt(sdp_message_t *sdp,int pos,int pt,con
return NULL;
}
#ifdef FOR_LATER
/* return the value of attr "field" */
char *sdp_message_a_attr_value_get(sdp_message_t *sdp,int pos,const char *field)
static const char *sdp_message_a_attr_value_get(sdp_message_t *sdp,int pos,const char *field)
{
int i;
sdp_attribute_t *attr;
@ -88,6 +89,7 @@ char *sdp_message_a_attr_value_get(sdp_message_t *sdp,int pos,const char *field)
}
return NULL;
}
#endif
static int _sdp_message_get_a_ptime(sdp_message_t *sdp, int mline){
int i,ret;
@ -128,11 +130,16 @@ static sdp_message_t *create_generic_sdp(const SalMediaDescription *desc)
void add_payload(sdp_message_t *msg, int line, const PayloadType *pt)
static void add_payload(sdp_message_t *msg, int line, const PayloadType *pt)
{
char attr[256];
sdp_message_m_payload_add (msg,line, int_2char (payload_type_get_number(pt)));
snprintf (attr,sizeof(attr),"%i %s", payload_type_get_number(pt), pt->mime_type);
if (pt->type==PAYLOAD_AUDIO_CONTINUOUS || pt->type==PAYLOAD_AUDIO_PACKETIZED)
snprintf (attr,sizeof(attr),"%i %s/%i/%i", payload_type_get_number(pt),
pt->mime_type, pt->clock_rate,pt->channels);
else
snprintf (attr,sizeof(attr),"%i %s/%i", payload_type_get_number(pt),
pt->mime_type, pt->clock_rate);
sdp_message_a_attribute_add (msg, line,
osip_strdup ("rtpmap"), osip_strdup(attr));
@ -168,3 +175,94 @@ char *media_description_to_sdp(const SalMediaDescription *desc){
sdp_message_to_str(msg,&tmp);
return tmp;
}
static int payload_type_fill_from_rtpmap(PayloadType *pt, const char *rtpmap){
if (rtpmap==NULL){
PayloadType *refpt=rtp_profile_get_payload(&av_profile,payload_type_get_number(pt));
if (refpt){
pt->mime_type=ms_strdup(refpt->mime_type);
pt->clock_rate=refpt->clock_rate;
}else{
ms_error("payload number %i has no rtpmap and is unknown in AV Profile, ignored.",
payload_type_get_number(pt));
return -1;
}
}else{
char *mime=ms_strdup(rtpmap);
char *p=strchr(mime,'/');
if (p){
char *chans;
*p='\0';
p++;
chans=strchr(p,'/');
if (chans){
*chans='\0';
chans++;
pt->channels=atoi(chans);
}else pt->channels=1;
pt->clock_rate=atoi(p);
}
pt->mime_type=mime;
}
return 0;
}
int sdp_to_media_description(const char *sdp, SalMediaDescription *desc){
int i,j;
const char *mtype,*proto,*port,*addr,*number;
sdp_message_t *msg;
sdp_bandwidth_t *sbw=NULL;
sdp_message_init(&msg);
if (sdp_message_parse(msg,sdp)!=0){
ms_error("Fail to parse sdp message !");
sdp_message_free(msg);
return -1;
}
addr=sdp_message_c_addr_get (msg, -1, 0);
if (addr)
strncpy(desc->addr,addr,sizeof(desc->addr));
/* for each m= line */
for (i=0; !sdp_message_endof_media (msg, i) && i<SAL_MEDIA_DESCRIPTION_MAX_STREAMS; i++)
{
SalStreamDescription *stream=&desc->streams[i];
memset(stream,0,sizeof(*stream));
mtype = sdp_message_m_media_get(msg, i);
proto = sdp_message_m_proto_get (msg, i);
port = sdp_message_m_port_get(msg, i);
stream->proto=SAL_PROTO_UNKNOWN;
if (proto){
if (strcasecmp(proto,"RTP/AVP")==0)
stream->proto=SAL_PROTO_RTP_AVP;
else if (strcasecmp(proto,"RTP/SAVP")==0){
stream->proto=SAL_PROTO_RTP_SAVP;
}
}
addr = sdp_message_c_addr_get (msg, i, 0);
if (addr != NULL)
strncpy(stream->addr,addr,sizeof(stream->addr));
stream->ptime=_sdp_message_get_a_ptime(msg,i);
if (strcasecmp("audio", mtype) == 0){
stream->type=SAL_AUDIO;
}else if (strcasecmp("video", mtype) == 0){
stream->type=SAL_VIDEO;
}else stream->type=SAL_OTHER;
for(j=0;(sbw=sdp_message_bandwidth_get(msg,i,j))!=NULL;++j){
if (strcasecmp(sbw->b_bwtype,"AS")==0) stream->bandwidth=atoi(sbw->b_bandwidth);
}
/* for each payload type */
for (j=0;((number=sdp_message_m_payload_get (msg, i,j)) != NULL); j++){
const char *rtpmap,*fmtp;
int ptn=atoi(number);
PayloadType *pt=payload_type_new();
payload_type_set_number(pt,ptn);
/* get the rtpmap associated to this codec, if any */
rtpmap=sdp_message_a_attr_value_get_with_pt(msg, i,ptn,"rtpmap");
payload_type_fill_from_rtpmap(pt,rtpmap);
/* get the fmtp, if any */
fmtp=sdp_message_a_attr_value_get_with_pt(msg, i, ptn,"fmtp");
payload_type_set_send_fmtp(pt,fmtp);
}
}
return 0;
}