tree b75b5e29883a3a57c777c873899c710b639cb897
parent 4f598fc031acaa2fb5ccb1b4ac59831eb5f694c3
author Max <msuraev@sysmocom.de> 1477419736 +0200
committer Harald Welte <laforge@gnumonks.org> 1477646747 +0000

DTX DL: Add FACCH cache

When DL DTX is active and silent period is in progress dtx.cache is
populated by SID UPDATE message which about to be scheduled next. If at
that moment FACCH message arrives (which have higher priority) we have
to send ONSET message to L1 but we can't invalidate cache with SID
UPDATE as it will be used for SID FIRST message to resume silent period
after FACCH transmission is over (provided there were no incoming voice
in between). Hence the necessity for separate buffer to store content of
FACCH message while we're sending ONSET to L1 while keeping SID UPDATE
cached.

Change-Id: I316e81af893b24766bf259baaed7a0be75a11694
Related: OS#1801