| Piotr Krysik | 9e2e835 | 2018-02-27 12:16:25 +0100 | [diff] [blame] | 1 | /*! \file codec.h */ |
| 2 | |
| 3 | #pragma once |
| 4 | |
| 5 | #include <stdint.h> |
| 6 | #include <stdbool.h> |
| 7 | |
| 8 | #include <osmocom/core/utils.h> |
| 9 | |
| 10 | /* TS 101318 Chapter 5.1: 260 bits + 4bit sig */ |
| 11 | #define GSM_FR_BYTES 33 |
| 12 | /* TS 101318 Chapter 5.2: 112 bits, no sig */ |
| 13 | #define GSM_HR_BYTES 14 |
| 14 | /* TS 101318 Chapter 5.3: 244 bits + 4bit sig */ |
| 15 | #define GSM_EFR_BYTES 31 |
| 16 | |
| 17 | extern const uint16_t gsm610_bitorder[]; /* FR */ |
| 18 | extern const uint16_t gsm620_unvoiced_bitorder[]; /* HR unvoiced */ |
| 19 | extern const uint16_t gsm620_voiced_bitorder[]; /* HR voiced */ |
| 20 | extern const uint16_t gsm660_bitorder[]; /* EFR */ |
| 21 | |
| 22 | extern const uint16_t gsm690_12_2_bitorder[]; /* AMR 12.2 kbits */ |
| 23 | extern const uint16_t gsm690_10_2_bitorder[]; /* AMR 10.2 kbits */ |
| 24 | extern const uint16_t gsm690_7_95_bitorder[]; /* AMR 7.95 kbits */ |
| 25 | extern const uint16_t gsm690_7_4_bitorder[]; /* AMR 7.4 kbits */ |
| 26 | extern const uint16_t gsm690_6_7_bitorder[]; /* AMR 6.7 kbits */ |
| 27 | extern const uint16_t gsm690_5_9_bitorder[]; /* AMR 5.9 kbits */ |
| 28 | extern const uint16_t gsm690_5_15_bitorder[]; /* AMR 5.15 kbits */ |
| 29 | extern const uint16_t gsm690_4_75_bitorder[]; /* AMR 4.75 kbits */ |
| 30 | |
| 31 | extern const struct value_string osmo_amr_type_names[]; |
| 32 | |
| 33 | enum osmo_amr_type { |
| 34 | AMR_4_75 = 0, |
| 35 | AMR_5_15 = 1, |
| 36 | AMR_5_90 = 2, |
| 37 | AMR_6_70 = 3, |
| 38 | AMR_7_40 = 4, |
| 39 | AMR_7_95 = 5, |
| 40 | AMR_10_2 = 6, |
| 41 | AMR_12_2 = 7, |
| 42 | AMR_SID = 8, |
| 43 | AMR_GSM_EFR_SID = 9, |
| 44 | AMR_TDMA_EFR_SID = 10, |
| 45 | AMR_PDC_EFR_SID = 11, |
| 46 | AMR_NO_DATA = 15, |
| 47 | }; |
| 48 | |
| 49 | enum osmo_amr_quality { |
| 50 | AMR_BAD = 0, |
| 51 | AMR_GOOD = 1 |
| 52 | }; |
| 53 | |
| 54 | /*! Check if given AMR Frame Type is a speech frame |
| 55 | * \param[in] ft AMR Frame Type |
| 56 | * \returns true if AMR with given Frame Type contains voice, false otherwise |
| 57 | */ |
| 58 | static inline bool osmo_amr_is_speech(enum osmo_amr_type ft) |
| 59 | { |
| 60 | switch (ft) { |
| 61 | case AMR_4_75: |
| 62 | case AMR_5_15: |
| 63 | case AMR_5_90: |
| 64 | case AMR_6_70: |
| 65 | case AMR_7_40: |
| 66 | case AMR_7_95: |
| 67 | case AMR_10_2: |
| 68 | case AMR_12_2: |
| 69 | return true; |
| 70 | default: |
| 71 | return false; |
| 72 | } |
| 73 | } |
| 74 | |
| 75 | bool osmo_fr_check_sid(const uint8_t *rtp_payload, size_t payload_len); |
| 76 | bool osmo_hr_check_sid(const uint8_t *rtp_payload, size_t payload_len); |
| 77 | int osmo_amr_rtp_enc(uint8_t *payload, uint8_t cmr, enum osmo_amr_type ft, |
| 78 | enum osmo_amr_quality bfi); |
| 79 | int osmo_amr_rtp_dec(const uint8_t *payload, int payload_len, uint8_t *cmr, |
| 80 | int8_t *cmi, enum osmo_amr_type *ft, |
| 81 | enum osmo_amr_quality *bfi, int8_t *sti); |