From 3713af865503f78ad1a49604dc5d39908b94b2be Mon Sep 17 00:00:00 2001 From: Philipp Maier Date: Wed, 27 Feb 2019 16:48:25 +0100 Subject: gsm0808_utils: fix gsm48 multirate configuration generator The function gsm0808_sc_cfg_from_gsm48_mr_cfg() takes an S15 to S0 bitmask and converts that bitmask into an AMR multirate configuration struct. Unfortunately the current implementation implements 3GPP TS 28.062, Table 7.11.3.1.3-2 wrongly in some aspects. Lets fix this. - Fix wrong interpretation of the bitpatterns - 5,15K is invalid and must never be selected - Make sure that no more than 4 rates are selected in the active set - Extend unit-test Change-Id: I6fd7f4073b84093742c322752f2fd878d1071e15 Related: SYS#4470 --- include/osmocom/gsm/gsm0808_utils.h | 2 +- include/osmocom/gsm/protocol/gsm_08_08.h | 14 ++++++++++++++ 2 files changed, 15 insertions(+), 1 deletion(-) (limited to 'include/osmocom/gsm') diff --git a/include/osmocom/gsm/gsm0808_utils.h b/include/osmocom/gsm/gsm0808_utils.h index 53f145c5..dedb0298 100644 --- a/include/osmocom/gsm/gsm0808_utils.h +++ b/include/osmocom/gsm/gsm0808_utils.h @@ -130,7 +130,7 @@ 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); uint16_t gsm0808_sc_cfg_from_gsm48_mr_cfg(const struct gsm48_multi_rate_conf *cfg, bool fr); -void gsm48_mr_cfg_from_gsm0808_sc_cfg(struct gsm48_multi_rate_conf *cfg, uint16_t s15_s0); +int gsm48_mr_cfg_from_gsm0808_sc_cfg(struct gsm48_multi_rate_conf *cfg, uint16_t s15_s0); /*! \returns 3GPP TS 08.08 ยง3.2.2.5 Class of a given Cause */ static inline enum gsm0808_cause_class gsm0808_cause_class(enum gsm0808_cause cause) diff --git a/include/osmocom/gsm/protocol/gsm_08_08.h b/include/osmocom/gsm/protocol/gsm_08_08.h index 67dc6ee1..aa01ee5c 100644 --- a/include/osmocom/gsm/protocol/gsm_08_08.h +++ b/include/osmocom/gsm/protocol/gsm_08_08.h @@ -553,6 +553,20 @@ enum gsm0808_speech_codec_rate_defaults { GSM0808_SC_CFG_DEFAULT_AMR_12_2 = 0xc082 }; +/*! Single speech codec configurations broken down by reate. + * See also: 3GPP TS 28.062, Table 7.11.3.1.3-2: Preferred Configurations for + * the Adaptive Multi-Rate Codec Types. */ +enum gsm0808_speech_codec_rate { + GSM0808_SC_CFG_AMR_4_75 = 0x0001, + GSM0808_SC_CFG_AMR_4_75_5_90_7_40_12_20 = 0x0002, + GSM0808_SC_CFG_AMR_5_90 = 0x0004, + GSM0808_SC_CFG_AMR_6_70 = 0x0008, + GSM0808_SC_CFG_AMR_7_40 = 0x0010, + GSM0808_SC_CFG_AMR_7_95 = 0x0020, + GSM0808_SC_CFG_AMR_10_2 = 0x0040, + GSM0808_SC_CFG_AMR_12_2 = 0x0080, +}; + /* 3GPP TS 48.008 3.2.2.103 Speech Codec List */ #define SPEECH_CODEC_MAXLEN 255 struct gsm0808_speech_codec_list { -- cgit v1.2.3