diff options
| author | Philipp Maier <pmaier@sysmocom.de> | 2018-09-25 15:57:49 +0200 |
|---|---|---|
| committer | Harald Welte <laforge@gnumonks.org> | 2018-09-25 15:32:29 +0000 |
| commit | 8515d035ae09edf3ad4d6e0dcbe526eee8bce3eb (patch) | |
| tree | 7d2aa142f40d85f6ae1766de11ccd04153c8a214 /src | |
| parent | b066305016141606e7f031065dc71c2002a6af0a (diff) | |
gsm0808: add function to convert AMR S15-S0 to gsm0408 settings
Add a function to convert S0-S15 bits to struct gsm48_multi_rate_conf,
which hold the codec settings for AMR.
Change-Id: I973736273c236eee84decf15868190e339c3fed4
Related: OS#3548
Diffstat (limited to 'src')
| -rw-r--r-- | src/gsm/gsm0808_utils.c | 41 | ||||
| -rw-r--r-- | src/gsm/libosmogsm.map | 1 |
2 files changed, 42 insertions, 0 deletions
diff --git a/src/gsm/gsm0808_utils.c b/src/gsm/gsm0808_utils.c index 0d6938ef..886f546a 100644 --- a/src/gsm/gsm0808_utils.c +++ b/src/gsm/gsm0808_utils.c @@ -1204,6 +1204,47 @@ uint16_t gsm0808_sc_cfg_from_gsm48_mr_cfg(const struct gsm48_multi_rate_conf *cf return s15_s0; } +/*! Determine a GSM 04.08 AMR configuration struct from a set of speech codec + * configuration bits (S0-S15) + * \param[out] cfg AMR configuration in GSM 04.08 format. + * \param[in] s15_s0 configuration bits (S0-S15). */ +void gsm48_mr_cfg_from_gsm0808_sc_cfg(struct gsm48_multi_rate_conf *cfg, + uint16_t s15_s0) +{ + memset(cfg, 0, sizeof(*cfg)); + + /* Strip option bits */ + s15_s0 &= 0x00ff; + + /* Rate 5,15k must always be present */ + cfg->m5_15 = 1; + + if ((s15_s0 & GSM0808_SC_CFG_DEFAULT_AMR_4_75 & 0xff) == + (GSM0808_SC_CFG_DEFAULT_AMR_4_75 & 0xff)) + cfg->m4_75 = 1; + if ((s15_s0 & GSM0808_SC_CFG_DEFAULT_AMR_5_90 & 0xff) == + (GSM0808_SC_CFG_DEFAULT_AMR_5_90 & 0xff)) + cfg->m5_90 = 1; + if ((s15_s0 & GSM0808_SC_CFG_DEFAULT_AMR_6_70 & 0xff) == + (GSM0808_SC_CFG_DEFAULT_AMR_6_70 & 0xff)) + cfg->m6_70 = 1; + if ((s15_s0 & GSM0808_SC_CFG_DEFAULT_AMR_7_40 & 0xff) == + (GSM0808_SC_CFG_DEFAULT_AMR_7_40 & 0xff)) + cfg->m7_40 = 1; + if ((s15_s0 & GSM0808_SC_CFG_DEFAULT_AMR_7_95 & 0xff) == + (GSM0808_SC_CFG_DEFAULT_AMR_7_95 & 0xff)) + cfg->m7_95 = 1; + if ((s15_s0 & GSM0808_SC_CFG_DEFAULT_AMR_10_2 & 0xff) == + (GSM0808_SC_CFG_DEFAULT_AMR_10_2 & 0xff)) + cfg->m10_2 = 1; + if ((s15_s0 & GSM0808_SC_CFG_DEFAULT_AMR_12_2 & 0xff) == + (GSM0808_SC_CFG_DEFAULT_AMR_12_2 & 0xff)) + cfg->m12_2 = 1; + + cfg->ver = 1; + cfg->icmi = 1; +} + /*! Print a human readable name of the cell identifier to the char buffer. * This is useful both for struct gsm0808_cell_id and struct gsm0808_cell_id_list2. * See also gsm0808_cell_id_name() and gsm0808_cell_id_list_name(). diff --git a/src/gsm/libosmogsm.map b/src/gsm/libosmogsm.map index 3d08232c..dcc491d7 100644 --- a/src/gsm/libosmogsm.map +++ b/src/gsm/libosmogsm.map @@ -206,6 +206,7 @@ gsm0808_cell_id_u_name; gsm0808_chan_type_to_speech_codec; gsm0808_speech_codec_from_chan_type; gsm0808_sc_cfg_from_gsm48_mr_cfg; +gsm48_mr_cfg_from_gsm0808_sc_cfg; gsm0808_speech_codec_type_names; gsm0808_permitted_speech_names; gsm0808_chosen_enc_alg_names; |