GNU Radio's GSM Package
codec.h
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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 
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,
47 };
48 
50  AMR_BAD = 0,
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);
Definition: codec.h:44
const struct value_string osmo_amr_type_names[]
Definition: codec.h:38
Definition: codec.h:43
Definition: codec.h:39
osmo_amr_quality
Definition: codec.h:49
osmo_amr_type
Definition: codec.h:33
Definition: codec.h:35
Definition: codec.h:42
Definition: codec.h:51
int osmo_amr_rtp_enc(uint8_t *payload, uint8_t cmr, enum osmo_amr_type ft, enum osmo_amr_quality bfi)
Definition: utils.h:43
Definition: codec.h:45
Definition: codec.h:36
const uint16_t gsm690_5_15_bitorder[]
const uint16_t gsm690_12_2_bitorder[]
Definition: codec.h:37
const uint16_t gsm610_bitorder[]
Definition: codec.h:40
Definition: codec.h:41
Definition: codec.h:50
Definition: codec.h:34
const uint16_t gsm690_10_2_bitorder[]
bool osmo_hr_check_sid(const uint8_t *rtp_payload, size_t payload_len)
bool osmo_fr_check_sid(const uint8_t *rtp_payload, size_t payload_len)
const uint16_t gsm690_4_75_bitorder[]
const uint16_t gsm690_6_7_bitorder[]
const uint16_t gsm690_7_4_bitorder[]
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)
const uint16_t gsm620_voiced_bitorder[]
static bool osmo_amr_is_speech(enum osmo_amr_type ft)
Definition: codec.h:58
Definition: codec.h:46
const uint16_t gsm690_7_95_bitorder[]
const uint16_t gsm660_bitorder[]
const uint16_t gsm690_5_9_bitorder[]
const uint16_t gsm620_unvoiced_bitorder[]