path: root/openbsc/src/osmo-nitb/bsc_hack.c
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authorJacob Erlbeck <>2013-11-25 15:23:35 +0100
committerHolger Hans Peter Freyther <>2013-11-25 18:30:50 +0100
commit72c309021a386a0ecc91784cc262892b6d2561e8 (patch)
tree08673913a4e6ae3c007f16c380aed08530822330 /openbsc/src/osmo-nitb/bsc_hack.c
parentd62419b574f7002b1c857d9e2df72a95daca36f1 (diff)
mgcp/rtp: Fix timestamp offset when patching RTP packets
The current implementation increments the seqno but does not increment the RTP timestamp, leading to two identical timestamps following one after the other. This patch fixes this by adding the computed tsdelta when the offset is calulated. In the unlikely case, that a tsdelta hasn't been computed yet when the SSRC changes, a tsdelta is computed based on the RTP rate and a RTP packet duration of 20ms (one speech frame per channel and packet). If the RTP rate is not known, a rate of 8000 is assumed. Note that this approach presumes, that the per RTP packet duration (in samples) is the same for the last two packets of the stream being replaced (the first one). Sponsored-by: On-Waves ehf
Diffstat (limited to 'openbsc/src/osmo-nitb/bsc_hack.c')
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