diff options
| author | Pau Espin Pedrol <pespin@sysmocom.de> | 2022-12-19 17:37:49 +0100 |
|---|---|---|
| committer | Pau Espin Pedrol <pespin@sysmocom.de> | 2022-12-19 17:38:35 +0100 |
| commit | 8997fe8251ea9bc6aaaa32f081efa87b562e94dc (patch) | |
| tree | 34dea77819aed1e11ae7c29982f65604fc0af9fb | |
| parent | 09e62cc563bfeffe0340a6f4458d14cba1658458 (diff) | |
amr: Add struct definition for AMR BWE header
Change-Id: I4b44257605bc5967d862ee29076ea6260d9a6bd8
| -rw-r--r-- | include/osmocom/netif/amr.h | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/include/osmocom/netif/amr.h b/include/osmocom/netif/amr.h index 382c66a..c7ca5bb 100644 --- a/include/osmocom/netif/amr.h +++ b/include/osmocom/netif/amr.h @@ -15,6 +15,34 @@ */ /* + * 4.3. Bandwidth-Efficient Mode: + * + * Summary from 4.3.4: Same as Octet aligned (see below) but without padding after header and ToC: + * 0 1 + * 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * | CMR |F| FT |Q|X X X X X X| + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * + * X means AMR payload (padding in case of FT=NO_DATA). + */ +struct amr_hdr_bwe { +#if OSMO_IS_LITTLE_ENDIAN + uint8_t ft_hi:3, /* coding mode highest part */ + f:1, + cmr:4; /* Codec Mode Request */ + uint8_t data_start:6, + q:1, /* OK (not damaged) at origin? */ + ft_lo:1; /* coding mode lowest bit */ +#elif OSMO_IS_BIG_ENDIAN +/* auto-generated from the little endian part above (libosmocore/contrib/struct_endianess.py) */ + uint8_t cmr:4, f:1, ft_hi:3; + uint8_t ft_lo:1, q:1, data_start:6; +#endif + uint8_t data[0]; +} __attribute__((packed)); + +/* * 4.4. Octet-aligned Mode: * * 4.4.1. The Payload Header: |