From f9778b2a26ce06959ee7e188eb1d533d896f1846 Mon Sep 17 00:00:00 2001 From: Max Date: Wed, 28 Dec 2016 12:43:09 +0100 Subject: DTX AMR HR: fix inhibition * Unlike in AMR FR, in AMR HR incoming ONSET have to be treated differently depending on whether we've recently sent SID UPDATE or EMPTY frame. Split ST_SID_U FSM state into 2 states to accommodate for that and make sure that additional states specific to AMR HR are not used for AMR FR. * Avoid sending E_VOICE and E_SID_U in corresponding states as those do not initiate FSM state transitions anyway. This decrease extra load from FSM signalling which otherwise would be triggered on per-frame basis. * Introduce separate signal for SID First P1 -> P2 transition to avoid confusion with E_COMPL and E_SID_U initiated transitions from P1 state. * Don't init DTX FSM for SDCCH channels. Change-Id: I229ba39a38a223fada4881fc9aca35d3639371f8 Related: OS#1801 --- src/osmo-bts-litecell15/tch.c | 1 + 1 file changed, 1 insertion(+) (limited to 'src/osmo-bts-litecell15/tch.c') diff --git a/src/osmo-bts-litecell15/tch.c b/src/osmo-bts-litecell15/tch.c index de3c7e35..a47a88f6 100644 --- a/src/osmo-bts-litecell15/tch.c +++ b/src/osmo-bts-litecell15/tch.c @@ -322,6 +322,7 @@ int l1if_tch_encode(struct gsm_lchan *lchan, uint8_t *data, uint8_t *len, dtx_cache_payload(lchan, rtp_pl, rtp_pl_len, fn, 0); return 1; case ST_SID_U: + case ST_U_NOINH: return -EAGAIN; case ST_FACCH: return -EBADMSG; -- cgit v1.2.3