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authorKeith <keith@rhizomatica.org>2017-08-29 16:56:11 +0200
committerHolger Freyther <holger@freyther.de>2017-09-03 18:30:53 +0000
commitb6032727870ab2b98372b697d91f7256da4f32b3 (patch)
treea8dd8c397f426d93ea8a9234d6647727d4e01e45
parent148df95d42adbabd6ddd87e28c5970b615b9b3cd (diff)
sdp.c Send octet-align in fmtp
rfc4867 8.2: octet-align: Permissible values are 0 and 1. If 1, octet-aligned operation SHALL be used. If 0 or if not present, bandwidth-efficient operation is employed. We don't have any support for AMR BE mode, but if we don't send this the other end expects BE mode and can't decode the stream Change-Id: I938758ac4ec55db9223e3da6c3c277e8fa670055
-rw-r--r--src/sdp.c11
1 files changed, 10 insertions, 1 deletions
diff --git a/src/sdp.c b/src/sdp.c
index ccd000d..213e979 100644
--- a/src/sdp.c
+++ b/src/sdp.c
@@ -166,18 +166,27 @@ bool sdp_extract_sdp(struct sip_call_leg *leg, const sip_t *sip, bool any_codec)
char *sdp_create_file(struct sip_call_leg *leg, struct call_leg *other)
{
struct in_addr net = { .s_addr = ntohl(other->ip) };
+ char *fmtp_str = NULL, *sdp;
leg->wanted_codec = app_media_name(other->payload_msg_type);
- return talloc_asprintf(leg,
+
+ if (strcmp(leg->wanted_codec, "AMR") == 0)
+ fmtp_str = talloc_asprintf(leg, "a=fmtp:%d octet-align=1\r\n", other->payload_type);
+
+ sdp = talloc_asprintf(leg,
"v=0\r\n"
"o=Osmocom 0 0 IN IP4 %s\r\n"
"s=GSM Call\r\n"
"c=IN IP4 %s\r\n"
"t=0 0\r\n"
"m=audio %d RTP/AVP %d\r\n"
+ "%s"
"a=rtpmap:%d %s/8000\r\n",
inet_ntoa(net), inet_ntoa(net), /* never use diff. addr! */
other->port, other->payload_type,
+ fmtp_str ? fmtp_str : "",
other->payload_type,
leg->wanted_codec);
+ talloc_free(fmtp_str);
+ return sdp;
}