int sal_media_description_get_nb_active_streams(const SalMediaDescription *md) {
int i;
int nb = 0;
for (i = 0; i < SAL_MEDIA_DESCRIPTION_MAX_STREAMS; i++) {
if (sal_stream_description_active(&md->streams[i])) nb++;
}
return nb;
}
void sal_media_description_set_dir(SalMediaDescription *md, SalStreamDir stream_dir){
int i;
for(i=0;i<SAL_MEDIA_DESCRIPTION_MAX_STREAMS;++i){
SalStreamDescription *ss=&md->streams[i];
if (!sal_stream_description_active(ss)) continue;
ss->dir=stream_dir;
}
}
SalStreamDescription *sal_media_description_find_stream(SalMediaDescription *md, SalMediaProto proto, SalStreamType type){
int i;
for(i=0;i<SAL_MEDIA_DESCRIPTION_MAX_STREAMS;++i){
SalStreamDescription *ss=&md->streams[i];
if (!sal_stream_description_active(ss)) continue;
if (ss->proto==proto && ss->type==type) return ss;
}
return NULL;
}
bool_t sal_media_description_has_dtls(const SalMediaDescription *md) {
int i;
if (md->nb_streams == 0) return FALSE;
for (i = 0; i < SAL_MEDIA_DESCRIPTION_MAX_STREAMS; i++) {
if (!sal_stream_description_active(&md->streams[i])) continue;
if (sal_stream_description_has_dtls(&md->streams[i]) != TRUE) return FALSE;
}
return TRUE;
}
unsigned int sal_media_description_nb_active_streams_of_type(SalMediaDescription *md, SalStreamType type) {
unsigned int i;
unsigned int nb = 0;
for (i = 0; i < SAL_MEDIA_DESCRIPTION_MAX_STREAMS; ++i) {
if (!sal_stream_description_active(&md->streams[i])) continue;
if (md->streams[i].type == type) nb++;
}
return nb;
}
SalStreamDescription * sal_media_description_get_active_stream_of_type(SalMediaDescription *md, SalStreamType type, unsigned int idx) {
unsigned int i;
for (i = 0; i < SAL_MEDIA_DESCRIPTION_MAX_STREAMS; ++i) {
if (!sal_stream_description_active(&md->streams[i])) continue;
if (md->streams[i].type == type) {
if (idx-- == 0) return &md->streams[i];
}
}
return NULL;
}
static const SalStreamDescription *find_local_matching_stream(const SalMediaDescription *result, const SalMediaDescription *local_capabilities, const SalStreamDescription *remote_stream) {
int i;
for(i=0; i<local_capabilities->nb_streams; ++i) {
const SalStreamDescription *ss=&local_capabilities->streams[i];
if (!sal_stream_description_active(ss)) continue;
if (ss->type==remote_stream->type && proto_compatible(ss->proto,remote_stream->proto)
&& local_stream_not_already_used(result,ss)) return ss;
}
return NULL;
}
static const SalStreamDescription * get_media_stream_for_desc(const SalMediaDescription * smd, SalStreamType sal_stream_type) {
int count;
if (smd != NULL) {
for (count = 0; count < SAL_MEDIA_DESCRIPTION_MAX_STREAMS; ++count) {
if (sal_stream_description_active(&smd->streams[count]) && smd->streams[count].type == sal_stream_type) {
return &smd->streams[count];
}
}
}
return NULL;
}
int sal_media_description_equals(const SalMediaDescription *md1, const SalMediaDescription *md2) {
int result = SAL_MEDIA_DESCRIPTION_UNCHANGED;
int i;
if (strcmp(md1->addr, md2->addr) != 0) result |= SAL_MEDIA_DESCRIPTION_NETWORK_CHANGED;
if (md1->addr[0]!='\0' && md2->addr[0]!='\0' && ms_is_multicast(md1->addr) != ms_is_multicast(md2->addr))
result |= SAL_MEDIA_DESCRIPTION_NETWORK_XXXCAST_CHANGED;
if (md1->nb_streams != md2->nb_streams) result |= SAL_MEDIA_DESCRIPTION_STREAMS_CHANGED;
if (md1->bandwidth != md2->bandwidth) result |= SAL_MEDIA_DESCRIPTION_CODEC_CHANGED;
/* ICE */
if (strcmp(md1->ice_ufrag, md2->ice_ufrag) != 0) result |= SAL_MEDIA_DESCRIPTION_ICE_RESTART_DETECTED;
if (strcmp(md1->ice_pwd, md2->ice_pwd) != 0) result |= SAL_MEDIA_DESCRIPTION_ICE_RESTART_DETECTED;
for(i = 0; i < SAL_MEDIA_DESCRIPTION_MAX_STREAMS; ++i){
if (!sal_stream_description_active(&md1->streams[i]) && !sal_stream_description_active(&md2->streams[i])) continue;
result |= sal_stream_description_equals(&md1->streams[i], &md2->streams[i]);
}
return result;
}
bool_t sal_media_description_has_ipv6(const SalMediaDescription *md){
int i;
if (md->nb_streams == 0) return FALSE;
for (i = 0; i < SAL_MEDIA_DESCRIPTION_MAX_STREAMS; i++) {
if (!sal_stream_description_active(&md->streams[i])) continue;
if (md->streams[i].rtp_addr[0] != '\0'){
if (!sal_stream_description_has_ipv6(&md->streams[i])) return FALSE;
}else{
if (strchr(md->addr,':') == NULL) return FALSE;
}
}
return TRUE;
}
/*check for the presence of at least one stream with requested direction */
static bool_t has_dir(const SalMediaDescription *md, SalStreamDir stream_dir){
int i;
/* we are looking for at least one stream with requested direction, inactive streams are ignored*/
for(i=0;i<SAL_MEDIA_DESCRIPTION_MAX_STREAMS;++i){
const SalStreamDescription *ss=&md->streams[i];
if (!sal_stream_description_active(ss)) continue;
if (ss->dir==stream_dir) {
return TRUE;
}
/*compatibility check for phones that only used the null address and no attributes */
if (ss->dir==SalStreamSendRecv && stream_dir==SalStreamSendOnly && (is_null_address(md->addr) || is_null_address(ss->rtp_addr))){
return TRUE;
}
}
return FALSE;
}