diff options
| author | Max <msuraev@sysmocom.de> | 2016-05-25 18:13:51 +0200 |
|---|---|---|
| committer | Holger Freyther <holger@freyther.de> | 2016-05-31 10:11:51 +0000 |
| commit | 92db150488bdadf6577a4968feabd5a3ab694c5e (patch) | |
| tree | bbe91ee76c6dd6e41077ba22d29dc9c574b13516 /include/osmocom/codec | |
| parent | adef12a3497d14aafe677b77b468b952f4c6b5d5 (diff) | |
Add helper functions for AMR codec
* add functions to encode/decode various codec paramters from RTP payload with
AMR frame according to RFC 4867
* those functions are extended version based on code from osmo-bts'
amr.c by Andreas Eversberg
* add corresponding enum types and strings for logging
* add regression tests
It's useful both to replace manual parsing in osmo-bts with fuctions
covered by test suite and as a debugging helpers for issues related to
AMR.
Change-Id: Ia217679a07d3fbc970f435e20f6eac33d34bd597
Related: OS#1562
Reviewed-on: https://gerrit.osmocom.org/118
Tested-by: Jenkins Builder
Reviewed-by: Holger Freyther <holger@freyther.de>
Diffstat (limited to 'include/osmocom/codec')
| -rw-r--r-- | include/osmocom/codec/codec.h | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/include/osmocom/codec/codec.h b/include/osmocom/codec/codec.h index d126e0f7..b7bcc788 100644 --- a/include/osmocom/codec/codec.h +++ b/include/osmocom/codec/codec.h @@ -2,6 +2,8 @@ #include <stdint.h> +#include <osmocom/core/utils.h> + extern const uint16_t gsm610_bitorder[]; /* FR */ extern const uint16_t gsm620_unvoiced_bitorder[]; /* HR unvoiced */ extern const uint16_t gsm620_voiced_bitorder[]; /* HR voiced */ @@ -15,3 +17,32 @@ extern const uint16_t gsm690_6_7_bitorder[]; /* AMR 6.7 kbits */ extern const uint16_t gsm690_5_9_bitorder[]; /* AMR 5.9 kbits */ extern const uint16_t gsm690_5_15_bitorder[]; /* AMR 5.15 kbits */ extern const uint16_t gsm690_4_75_bitorder[]; /* AMR 4.75 kbits */ + +extern const struct value_string osmo_amr_type_names[]; + +enum osmo_amr_type { + AMR_4_75 = 0, + AMR_5_15 = 1, + AMR_5_90 = 2, + AMR_6_70 = 3, + AMR_7_40 = 4, + AMR_7_95 = 5, + AMR_10_2 = 6, + AMR_12_2 = 7, + AMR_SID = 8, + AMR_GSM_EFR_SID = 9, + AMR_TDMA_EFR_SID = 10, + AMR_PDC_EFR_SID = 11, + AMR_NO_DATA = 15, +}; + +enum osmo_amr_quality { + AMR_BAD = 0, + AMR_GOOD = 1 +}; + +int osmo_amr_rtp_enc(uint8_t *payload, uint8_t cmr, enum osmo_amr_type ft, + enum osmo_amr_quality bfi); +int osmo_amr_rtp_dec(const uint8_t *payload, int payload_len, uint8_t *cmr, + int8_t *cmi, enum osmo_amr_type *ft, + enum osmo_amr_quality *bfi, int8_t *sti); |