mgcp/rtp: Only patch timestamp alignment errors
Currently, all timestamps are force to SeqNo*d + C which is more than
required by the nanoBTS which seems to be sensitive to alignment
errors only (dTS != k*d, d = ptime * rate = 160).
This patch replaces the force_constant_timing feature by a
force_aligned_timing feature. The timestamp offset will only be
changed (and timestamp errors counted) when the alignment does not
match to the raster based on ptime (default 20ms).
The VTY interface does not change.
Sponsored-by: On-Waves ehf
diff --git a/openbsc/src/libmgcp/mgcp_protocol.c b/openbsc/src/libmgcp/mgcp_protocol.c
index 7d3ad74..ddec44d 100644
--- a/openbsc/src/libmgcp/mgcp_protocol.c
+++ b/openbsc/src/libmgcp/mgcp_protocol.c
@@ -700,13 +700,13 @@
int patch_ssrc = expect_ssrc_change && tcfg->force_constant_ssrc;
- rtp->force_constant_timing = tcfg->force_constant_timing;
+ rtp->force_aligned_timing = tcfg->force_aligned_timing;
rtp->force_constant_ssrc = patch_ssrc ? 1 : 0;
LOGP(DMGCP, LOGL_DEBUG,
"Configuring RTP endpoint: local port %d%s%s\n",
ntohs(rtp->rtp_port),
- rtp->force_constant_timing ? ", force constant timing" : "",
+ rtp->force_aligned_timing ? ", force constant timing" : "",
rtp->force_constant_ssrc ? ", force constant ssrc" : "");
}