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Diffstat (limited to 'res/res_pjsip_sdp_rtp.c')
-rw-r--r--res/res_pjsip_sdp_rtp.c18
1 files changed, 13 insertions, 5 deletions
diff --git a/res/res_pjsip_sdp_rtp.c b/res/res_pjsip_sdp_rtp.c
index 29a46efc5..5aa176a2a 100644
--- a/res/res_pjsip_sdp_rtp.c
+++ b/res/res_pjsip_sdp_rtp.c
@@ -256,18 +256,26 @@ static int set_caps(struct ast_sip_session *session, struct ast_sip_session_medi
ast_rtp_codecs_payloads_copy(&codecs, ast_rtp_instance_get_codecs(session_media->rtp),
session_media->rtp);
- ast_format_cap_remove_by_type(caps, AST_MEDIA_TYPE_UNKNOWN);
- ast_format_cap_append_from_cap(caps, session->req_caps, AST_MEDIA_TYPE_UNKNOWN);
- ast_format_cap_remove_by_type(caps, media_type);
- ast_format_cap_append_from_cap(caps, joint, AST_MEDIA_TYPE_UNKNOWN);
- ast_format_cap_append_from_cap(session->req_caps, caps, AST_MEDIA_TYPE_UNKNOWN);
+ ast_format_cap_append_from_cap(session->req_caps, joint, AST_MEDIA_TYPE_UNKNOWN);
if (session->channel) {
struct ast_format *fmt;
ast_channel_lock(session->channel);
+ ast_format_cap_remove_by_type(caps, AST_MEDIA_TYPE_UNKNOWN);
ast_format_cap_append_from_cap(caps, ast_channel_nativeformats(session->channel), AST_MEDIA_TYPE_UNKNOWN);
ast_format_cap_remove_by_type(caps, media_type);
+
+ /*
+ * XXX Historically we picked the "best" joint format to use
+ * and stuck with it. It would be nice to just append the
+ * determined joint media capabilities to give translation
+ * more formats to choose from when necessary. Unfortunately,
+ * there are some areas of the system where this doesn't work
+ * very well. (The softmix bridge in particular is reluctant
+ * to pick higher fidelity formats and has a problem with
+ * asymmetric sample rates.)
+ */
fmt = ast_format_cap_get_format(joint, 0);
ast_format_cap_append(caps, fmt, 0);