diff options
| author | Harald Welte <laforge@osmocom.org> | 2020-05-14 13:28:07 +0200 |
|---|---|---|
| committer | Harald Welte <laforge@osmocom.org> | 2020-08-03 02:29:21 +0200 |
| commit | 78861c0aef1859165158e36b808b8c43dc2d38b4 (patch) | |
| tree | c7659fac5074c1a0d8026cbe524124c62dcdc61b /include | |
| parent | 95e2dfbc83437ddab54f7882edfd0fe79b767ba9 (diff) | |
Add new TRAU frame sync code
This code is able to detect and sync against a variety of TRAU
frame sync patterns. Focus is so far on those patterns present on
16k sub-slots, but 8k sub-slots are expected to be supported soon,
too.
A new codebase for this is required as the old OsmoNITB code had
conflated a 16k sub-slot multiplexer with TRAU frame synchronization,
so there was no way to separate those two parts and hence no way to
support 8k sub-slots.
Change-Id: Ia6fe6228b0b8b9a27999f37ce1115ed5558881ea
Diffstat (limited to 'include')
| -rw-r--r-- | include/Makefile.am | 3 | ||||
| -rw-r--r-- | include/osmocom/trau/trau_sync.h | 19 |
2 files changed, 21 insertions, 1 deletions
diff --git a/include/Makefile.am b/include/Makefile.am index aa735c5..2a99211 100644 --- a/include/Makefile.am +++ b/include/Makefile.am @@ -5,4 +5,5 @@ nobase_include_HEADERS = osmocom/abis/ipa.h osmocom/abis/trau_frame.h \ osmocom/abis/subchan_demux.h osmocom/abis/e1_input.h \ osmocom/abis/lapd.h osmocom/abis/lapd_pcap.h osmocom/trau/osmo_ortp.h \ osmocom/abis/unixsocket_proto.h \ - osmocom/trau/trau_frame.h + osmocom/trau/trau_frame.h \ + osmocom/trau/trau_sync.h diff --git a/include/osmocom/trau/trau_sync.h b/include/osmocom/trau/trau_sync.h new file mode 100644 index 0000000..46595be --- /dev/null +++ b/include/osmocom/trau/trau_sync.h @@ -0,0 +1,19 @@ +#pragma once +#include <osmocom/core/bits.h> +#include <osmocom/core/fsm.h> + +enum osmo_tray_sync_pat_id { + OSMO_TRAU_SYNCP_16_FR_EFR, + OSMO_TRAU_SYNCP_8_HR, + OSMO_TRAU_SYNCP_8_AMR_LOW, + OSMO_TRAU_SYNCP_8_AMR_6K7, + OSMO_TRAU_SYNCP_8_AMR_7K4, +}; + +typedef void (*frame_out_cb_t)(void *user_data, const ubit_t *bits, unsigned int num_bits); + +struct osmo_fsm_inst * +osmo_trau_sync_alloc(void *ctx, const char *name, frame_out_cb_t frame_out_cb, + enum osmo_tray_sync_pat_id pat_id, void *user_data); + +void osmo_trau_sync_rx_ubits(struct osmo_fsm_inst *fi, const ubit_t *bits, size_t n_bits); |