| /*! \file codec.h */ |
| |
| #pragma once |
| |
| #include <stdint.h> |
| #include <stdbool.h> |
| |
| #include <osmocom/core/utils.h> |
| |
| /* TS 101318 Chapter 5.1: 260 bits + 4bit sig */ |
| #define GSM_FR_BYTES 33 |
| /* TS 101318 Chapter 5.2: 112 bits, no sig */ |
| #define GSM_HR_BYTES 14 |
| /* TS 101318 Chapter 5.3: 244 bits + 4bit sig */ |
| #define GSM_EFR_BYTES 31 |
| |
| 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 */ |
| extern const uint16_t gsm660_bitorder[]; /* EFR */ |
| |
| extern const uint16_t gsm690_12_2_bitorder[]; /* AMR 12.2 kbits */ |
| extern const uint16_t gsm690_10_2_bitorder[]; /* AMR 10.2 kbits */ |
| extern const uint16_t gsm690_7_95_bitorder[]; /* AMR 7.95 kbits */ |
| extern const uint16_t gsm690_7_4_bitorder[]; /* AMR 7.4 kbits */ |
| 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 |
| }; |
| |
| /*! Check if given AMR Frame Type is a speech frame |
| * \param[in] ft AMR Frame Type |
| * \returns true if AMR with given Frame Type contains voice, false otherwise |
| */ |
| static inline bool osmo_amr_is_speech(enum osmo_amr_type ft) |
| { |
| switch (ft) { |
| case AMR_4_75: |
| case AMR_5_15: |
| case AMR_5_90: |
| case AMR_6_70: |
| case AMR_7_40: |
| case AMR_7_95: |
| case AMR_10_2: |
| case AMR_12_2: |
| return true; |
| default: |
| return false; |
| } |
| } |
| |
| bool osmo_fr_check_sid(const uint8_t *rtp_payload, size_t payload_len); |
| bool osmo_hr_check_sid(const uint8_t *rtp_payload, size_t payload_len); |
| 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); |