[codecs filter] MT call: apply remote call leg codecs
Collect either the SDP or the Bearer Capabilites in the incoming
MNCC in the new codecs filter.
So far just collect the info and do not change the behavior, using the
filter result will follow in a subsequent patch.
Related: SYS#5066
Change-Id: I84d9bbca3e4061da622b1b2fc0bde8868e7e3521
diff --git a/src/libmsc/gsm_04_08_cc.c b/src/libmsc/gsm_04_08_cc.c
index 93dcdf8..12f2c89 100644
--- a/src/libmsc/gsm_04_08_cc.c
+++ b/src/libmsc/gsm_04_08_cc.c
@@ -739,9 +739,28 @@
codec_filter_init(&trans->cc.codecs);
codec_filter_set_ran(&trans->cc.codecs, trans->msc_a->c.ran->type);
codec_filter_set_bss(&trans->cc.codecs, &trans->msc_a->cc.compl_l3_codec_list_bss_supported);
+ /* sdp.remote: if SDP is included in the MNCC, take that as definitive list of remote audio codecs. */
+ if (setup->sdp[0]) {
+ rc = sdp_msg_from_sdp_str(&trans->cc.codecs.remote, setup->sdp);
+ if (rc)
+ LOG_TRANS(trans, LOGL_ERROR, "Failed to parse remote call leg SDP: %d\n", rc);
+ }
+ /* sdp.remote: if there is no SDP information or we failed to parse it, try using the Bearer Capability from
+ * MNCC, if any. */
+ if (!trans->cc.codecs.remote.audio_codecs.count && (setup->fields & MNCC_F_BEARER_CAP)) {
+ trans->cc.codecs.remote = (struct sdp_msg){};
+ sdp_audio_codecs_from_bearer_cap(&trans->cc.codecs.remote.audio_codecs,
+ &setup->bearer_cap);
+ }
+ if (!trans->cc.codecs.remote.audio_codecs.count)
+ LOG_TRANS(trans, LOGL_INFO,
+ "Got no information of remote audio codecs: neither SDP nor Bearer Capability. Trying anyway.\n");
+
codec_filter_run(&trans->cc.codecs);
LOG_TRANS(trans, LOGL_DEBUG, "codecs: %s\n", codec_filter_to_str(&trans->cc.codecs));
+ /* NEAR FUTURE: upcoming patch will use the codecs filter to determine the Bearer Cap to send to the MS.
+ * So far just gathering information in the new codecs filter. */
/* bearer capability */
if (setup->fields & MNCC_F_BEARER_CAP) {
/* Create a copy of the bearer capability in the transaction struct, so we