fixeria has uploaded this change for review. ( https://gerrit.osmocom.org/c/osmo-bts/+/38303?usp=email )
Change subject: [WIP] csd_v110: align TCH/F4.8 NT with DL radio blocks ......................................................................
[WIP] csd_v110: align TCH/F4.8 NT with DL radio blocks
Change-Id: Iea4a21ab9d333bbf416a0997971b1ba25784f238 Related: OS#1572 --- M src/common/csd_v110.c 1 file changed, 10 insertions(+), 0 deletions(-)
git pull ssh://gerrit.osmocom.org:29418/osmo-bts refs/changes/03/38303/1
diff --git a/src/common/csd_v110.c b/src/common/csd_v110.c index 5fb86b7..aed1715 100644 --- a/src/common/csd_v110.c +++ b/src/common/csd_v110.c @@ -199,6 +199,16 @@ osmo_csd_12k_6k_encode_frame(&data[i * 60], 60, &df); else /* desc->num_bits == 36 */ osmo_csd_3k6_encode_frame(&data[i * 36], 36, &df); + + if (lchan->csd_mode == LCHAN_CSD_M_NT) { + if ((i & 1) == 0) { /* executed for Q1/Q3 */ + /* E7: 0 for Q1, 1 for Q2/Q3/Q4 (3GPP TS 44.021, Figure 1) + * E2: 0 for Q1/Q2, 1 for Q3/Q4 (3GPP TS 48.020, Table 7) */ + if (OSMO_UNLIKELY(df.e_bits[1] != df.e_bits[6])) + return -EINVAL; /* drop unaligned blocks */ + /* TODO: (for TCH/F4.8) store and send this block later? */ + } + } }
return desc->num_blocks * desc->num_bits;
-
fixeria