Attention is currently required from: fixeria, neels, pespin.

Hello Jenkins Builder, fixeria, pespin,

I'd like you to reexamine a change. Please visit

    https://gerrit.osmocom.org/c/osmo-msc/+/35051?usp=email

to look at the new patch set (#7).

The following approvals got outdated and were removed:
Code-Review-1 by neels, Verified+1 by Jenkins Builder


Change subject: implement re-assignment to match codecs
......................................................................

implement re-assignment to match codecs

This is the last missing piece that allows osmo-msc to make good TFO
codecs choices.

Since the codec_filter, osmo-msc properly gathers codec options and
limitations. But the MO call leg still assigns a voice channel before
getting a response from the MT call leg, and is then stuck with that.

Add the capability to adjust the MO call leg's codec in case the MT side
needs a different codec for TFO.

This is only relevant for 2G; on 3G we always have AMR/IuUP.

For inter-MSC handover, keep the behavior unchanged: offer only the
currently assigned codec to the remote side. Codec-changing HO should be
equally trivial to implement, but that is for another day.

msc_vlr_test_call's codec tests are adjusted to test the new feature in
Ib933554f826c1b4347dfa3f6c4f6fe086be8b133. For now, avoid change in
these tests by validating the first codec in SDP lists only.

Related: OS#6258
Related: osmo-ttcn3-hacks I402ed0523a2a87b83f29c5577b2c828102005d53
Change-Id: I8760feaa8598047369ef8c3ab2673013bac8ac8a
---
M include/osmocom/msc/msc_a.h
M src/libmsc/codec_filter.c
M src/libmsc/gsm_04_08_cc.c
M src/libmsc/msc_a.c
M src/libmsc/msc_ho.c
M tests/msc_vlr/msc_vlr_test_call.c
M tests/msc_vlr/msc_vlr_test_call.err
7 files changed, 120 insertions(+), 60 deletions(-)


  git pull ssh://gerrit.osmocom.org:29418/osmo-msc refs/changes/51/35051/7
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Gerrit-Project: osmo-msc
Gerrit-Branch: master
Gerrit-Change-Id: I8760feaa8598047369ef8c3ab2673013bac8ac8a
Gerrit-Change-Number: 35051
Gerrit-PatchSet: 7
Gerrit-Owner: neels <[email protected]>
Gerrit-Reviewer: Jenkins Builder
Gerrit-Reviewer: fixeria <[email protected]>
Gerrit-Reviewer: neels <[email protected]>
Gerrit-Reviewer: pespin <[email protected]>
Gerrit-Attention: neels <[email protected]>
Gerrit-Attention: pespin <[email protected]>
Gerrit-Attention: fixeria <[email protected]>
Gerrit-MessageType: newpatchset

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