diff options
| author | Harald Welte <laforge@osmocom.org> | 2022-11-29 20:46:52 +0100 |
|---|---|---|
| committer | Harald Welte <laforge@osmocom.org> | 2022-11-30 15:35:15 +0100 |
| commit | 9d90eb99607143499ef5483f3c41934f0922d1de (patch) | |
| tree | 1b876899a7221b3e3e11d2afa9c8216930ef3bd4 | |
| parent | 3d8426e4c4fd951476b648570cf7ec91e72d1e5d (diff) | |
trau_sync: Add the V.110 sync pattern
ITU-T V.110 is used in GSM CSD (Circuit Switched Data). The frames
are rather similar to TRAU frames, so we can use the trau_sync code
for it. This commit adds the related definition.
Related: OS#4395
Change-Id: I3aab5c3f494f6ea2b11f3cf69fb09bc77ea941d8
| -rw-r--r-- | include/osmocom/trau/trau_sync.h | 1 | ||||
| -rw-r--r-- | src/trau/trau_sync.c | 13 |
2 files changed, 14 insertions, 0 deletions
diff --git a/include/osmocom/trau/trau_sync.h b/include/osmocom/trau/trau_sync.h index bd99586..ffda02a 100644 --- a/include/osmocom/trau/trau_sync.h +++ b/include/osmocom/trau/trau_sync.h @@ -8,6 +8,7 @@ enum osmo_tray_sync_pat_id { OSMO_TRAU_SYNCP_8_AMR_LOW, OSMO_TRAU_SYNCP_8_AMR_6K7, OSMO_TRAU_SYNCP_8_AMR_7K4, + OSMO_TRAU_SYNCP_V110, }; typedef void (*frame_out_cb_t)(void *user_data, const ubit_t *bits, unsigned int num_bits); diff --git a/src/trau/trau_sync.c b/src/trau/trau_sync.c index dba9cd1..b36e7c1 100644 --- a/src/trau/trau_sync.c +++ b/src/trau/trau_sync.c @@ -145,6 +145,19 @@ static struct sync_pattern sync_patterns[] = { }, .byte_len = 20, }, + [OSMO_TRAU_SYNCP_V110] = { + /* See Table 2 of ITU-T V.110 */ + .name = "V110", + .byte_pattern = { + 0x00, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, + }, + .byte_mask = { + 0xff, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x80, + }, + .byte_len = 10, + }, }; #if 0 |