diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/osmocom/gsm/gsm0808_utils.h | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/include/osmocom/gsm/gsm0808_utils.h b/include/osmocom/gsm/gsm0808_utils.h index 8cdb74bb..24c139a8 100644 --- a/include/osmocom/gsm/gsm0808_utils.h +++ b/include/osmocom/gsm/gsm0808_utils.h @@ -26,7 +26,9 @@ struct sockaddr_storage; #include <osmocom/gsm/protocol/gsm_08_08.h> +#include <osmocom/gsm/protocol/gsm_04_08.h> #include <osmocom/gsm/gsm23003.h> +#include <osmocom/gsm/gsm_utils.h> /*! (225-1)/2 is the maximum number of elements in a cell identifier list. */ #define GSM0808_CELL_ID_LIST2_MAXLEN 127 @@ -102,4 +104,109 @@ int gsm0808_chan_type_to_speech_codec(uint8_t perm_spch); int gsm0808_speech_codec_from_chan_type(struct gsm0808_speech_codec *sc, uint8_t perm_spch); +/*! Return 3GPP TS 48.008 3.2.2.49 Current Channel Type 1 from enum gsm_chan_t. */ +static inline uint8_t gsm0808_current_channel_type_1(enum gsm_chan_t type) +{ + switch (type) { + default: + return 0; + case GSM_LCHAN_SDCCH: + return 0x01; + case GSM_LCHAN_TCH_F: + return 0x18; + case GSM_LCHAN_TCH_H: + return 0x19; + } +} + +/*! Return 3GPP TS 48.008 3.2.2.51 Speech Version aka permitted speech version indication in 3.2.2.11 + * Channel Type. */ +static inline enum gsm0808_permitted_speech gsm0808_permitted_speech(enum gsm_chan_t type, + enum gsm48_chan_mode mode) +{ + switch (mode) { + case GSM48_CMODE_SPEECH_V1: + switch (type) { + case GSM_LCHAN_TCH_F: + return GSM0808_PERM_FR1; + case GSM_LCHAN_TCH_H: + return GSM0808_PERM_HR1; + default: + return 0; + } + case GSM48_CMODE_SPEECH_EFR: + switch (type) { + case GSM_LCHAN_TCH_F: + return GSM0808_PERM_FR2; + case GSM_LCHAN_TCH_H: + return GSM0808_PERM_HR2; + default: + return 0; + } + case GSM48_CMODE_SPEECH_AMR: + switch (type) { + case GSM_LCHAN_TCH_F: + return GSM0808_PERM_HR3; + case GSM_LCHAN_TCH_H: + return GSM0808_PERM_HR3; + default: + return 0; + } + default: + return 0; + } +} + +/*! Return 3GPP TS 48.008 3.2.2.33 Chosen Channel. */ +static inline uint8_t gsm0808_chosen_channel(enum gsm_chan_t type, enum gsm48_chan_mode mode) +{ + uint8_t channel_mode = 0, channel = 0; + + switch (mode) { + case GSM48_CMODE_SPEECH_V1: + case GSM48_CMODE_SPEECH_EFR: + case GSM48_CMODE_SPEECH_AMR: + channel_mode = 0x9; + break; + case GSM48_CMODE_SIGN: + channel_mode = 0x8; + break; + case GSM48_CMODE_DATA_14k5: + channel_mode = 0xe; + break; + case GSM48_CMODE_DATA_12k0: + channel_mode = 0xb; + break; + case GSM48_CMODE_DATA_6k0: + channel_mode = 0xc; + break; + case GSM48_CMODE_DATA_3k6: + channel_mode = 0xd; + break; + default: + return 0; + } + + switch (type) { + case GSM_LCHAN_NONE: + channel = 0x0; + break; + case GSM_LCHAN_SDCCH: + channel = 0x1; + break; + case GSM_LCHAN_TCH_F: + channel = 0x8; + break; + case GSM_LCHAN_TCH_H: + channel = 0x9; + break; + default: + return 0; + } + + return channel_mode << 4 | channel; +} + +const char *gsm0808_channel_type_name(const struct gsm0808_channel_type *ct); + /*! @} */ |