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module-rtp: Allow overriding session version

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This allows us to set an session version for the SAP externally. Also
the default is changed from 0 to an NTP timestamp, as recommended by the
spec[1].

[1] https://datatracker.ietf.org/doc/html/rfc4566#section-5.2
This commit is contained in:
Arun Raghavan 2024-07-05 10:42:53 -04:00 • committed by Wim Taymans
parent 7c8453f260
commit 6623eb8254
2 changed files with 12 additions and 2 deletions
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13
src/modules/module-rtp-sap.c
View file

@ -180,6 +180,7 @@ static const struct spa_dict_item module_info[] = {
struct sdp_info {
uint16_t hash;
uint32_t session_id;
uint32_t session_version;
uint32_t t_ntp;
char *origin;
@ -687,12 +688,12 @@ static int send_sap(struct impl *impl, struct session *sess, bool bye)
the end. */
spa_strbuf_append(&buf,
"v=0\n"
"o=%s %u 0 IN %s %s\n"
"o=%s %u %u IN %s %s\n"
"s=%s\n"
"c=IN %s %s%s\n"
"t=%u 0\n"
"m=%s %u RTP/AVP %i\n",
user_name, sdp->session_id, src_ip4 ? "IP4" : "IP6", src_addr,
user_name, sdp->session_id, sdp->session_version, src_ip4 ? "IP4" : "IP6", src_addr,
sdp->session_name,
dst_ip4 ? "IP4" : "IP6", dst_addr, dst_ttl,
sdp->t_ntp,
@ -865,6 +866,14 @@ static struct session *session_new_announce(struct impl *impl, struct node *node
sdp->session_id = (uint32_t) time(NULL) + 2208988800U + impl->n_sessions;
sdp->t_ntp = pw_properties_get_uint32(props, "rtp.ntp", sdp->session_id);
}
if ((str = pw_properties_get(props, "sess.version")) != NULL) {
if (!spa_atou32(str, &sdp->session_version, 10)) {
pw_log_error("Invalid session version: %s (must be a uint32)", str);
goto error_free;
}
} else {
sdp->session_version = sdp->t_ntp;
}
sess->props = props;
if ((str = pw_properties_get(props, "sess.name")) == NULL)