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module-rtp: Allow overriding session ID

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This allows us to specify a static session ID, so that (Dante) receivers
can uniquely identify us as a sender. This prevents duplicate streams in
Dante Controller, for example.
This commit is contained in:
Arun Raghavan 2024-07-04 13:13:37 -04:00 • committed by Wim Taymans
parent f5512e8b88
commit 7c8453f260
2 changed files with 14 additions and 4 deletions
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17
src/modules/module-rtp-sap.c
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@ -179,7 +179,7 @@ static const struct spa_dict_item module_info[] = {
struct sdp_info {
uint16_t hash;
uint32_t ntp;
uint32_t session_id;
uint32_t t_ntp;
char *origin;
@ -692,7 +692,7 @@ static int send_sap(struct impl *impl, struct session *sess, bool bye)
"c=IN %s %s%s\n"
"t=%u 0\n"
"m=%s %u RTP/AVP %i\n",
user_name, sdp->ntp, src_ip4 ? "IP4" : "IP6", src_addr,
user_name, sdp->session_id, src_ip4 ? "IP4" : "IP6", src_addr,
sdp->session_name,
dst_ip4 ? "IP4" : "IP6", dst_addr, dst_ttl,
sdp->t_ntp,
@ -854,8 +854,17 @@ static struct session *session_new_announce(struct impl *impl, struct node *node
sess->announce = true;
sdp->hash = pw_rand32();
sdp->ntp = (uint32_t) time(NULL) + 2208988800U + impl->n_sessions;
sdp->t_ntp = pw_properties_get_uint32(props, "rtp.ntp", sdp->ntp);
if ((str = pw_properties_get(props, "sess.id")) != NULL) {
if (!spa_atou32(str, &sdp->session_id, 10)) {
pw_log_error("Invalid session id: %s (must be a uint32)", str);
goto error_free;
}
sdp->t_ntp = pw_properties_get_uint32(props, "rtp.ntp",
(uint32_t) time(NULL) + 2208988800U + impl->n_sessions);
} else {
sdp->session_id = (uint32_t) time(NULL) + 2208988800U + impl->n_sessions;
sdp->t_ntp = pw_properties_get_uint32(props, "rtp.ntp", sdp->session_id);
}
sess->props = props;
if ((str = pw_properties_get(props, "sess.name")) == NULL)