GNU Radio's GSM Package
codec.h File Reference
#include <stdint.h>
#include <stdbool.h>
#include <osmocom/core/utils.h>

Go to the source code of this file.

Macros

#define GSM_FR_BYTES   33
 
#define GSM_HR_BYTES   14
 
#define GSM_EFR_BYTES   31
 

Enumerations

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 }
 

Functions

static bool osmo_amr_is_speech (enum osmo_amr_type ft)
 
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)
 

Variables

const uint16_t gsm610_bitorder []
 
const uint16_t gsm620_unvoiced_bitorder []
 
const uint16_t gsm620_voiced_bitorder []
 
const uint16_t gsm660_bitorder []
 
const uint16_t gsm690_12_2_bitorder []
 
const uint16_t gsm690_10_2_bitorder []
 
const uint16_t gsm690_7_95_bitorder []
 
const uint16_t gsm690_7_4_bitorder []
 
const uint16_t gsm690_6_7_bitorder []
 
const uint16_t gsm690_5_9_bitorder []
 
const uint16_t gsm690_5_15_bitorder []
 
const uint16_t gsm690_4_75_bitorder []
 
const struct value_string osmo_amr_type_names []
 

Macro Definition Documentation

◆ GSM_EFR_BYTES

#define GSM_EFR_BYTES   31

◆ GSM_FR_BYTES

#define GSM_FR_BYTES   33

◆ GSM_HR_BYTES

#define GSM_HR_BYTES   14

Enumeration Type Documentation

◆ osmo_amr_quality

Enumerator
AMR_BAD 
AMR_GOOD 

◆ osmo_amr_type

Enumerator
AMR_4_75 
AMR_5_15 
AMR_5_90 
AMR_6_70 
AMR_7_40 
AMR_7_95 
AMR_10_2 
AMR_12_2 
AMR_SID 
AMR_GSM_EFR_SID 
AMR_TDMA_EFR_SID 
AMR_PDC_EFR_SID 
AMR_NO_DATA 

Function Documentation

◆ osmo_amr_is_speech()

static bool osmo_amr_is_speech ( enum osmo_amr_type  ft)
inlinestatic

Check if given AMR Frame Type is a speech frame

Parameters
[in]ftAMR Frame Type
Returns
true if AMR with given Frame Type contains voice, false otherwise

References AMR_10_2, AMR_12_2, AMR_4_75, AMR_5_15, AMR_5_90, AMR_6_70, AMR_7_40, and AMR_7_95.

◆ osmo_amr_rtp_dec()

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 
)

◆ osmo_amr_rtp_enc()

int osmo_amr_rtp_enc ( uint8_t *  payload,
uint8_t  cmr,
enum osmo_amr_type  ft,
enum osmo_amr_quality  bfi 
)

◆ osmo_fr_check_sid()

bool osmo_fr_check_sid ( const uint8_t *  rtp_payload,
size_t  payload_len 
)

◆ osmo_hr_check_sid()

bool osmo_hr_check_sid ( const uint8_t *  rtp_payload,
size_t  payload_len 
)

Variable Documentation

◆ gsm610_bitorder

const uint16_t gsm610_bitorder[]

◆ gsm620_unvoiced_bitorder

const uint16_t gsm620_unvoiced_bitorder[]

◆ gsm620_voiced_bitorder

const uint16_t gsm620_voiced_bitorder[]

◆ gsm660_bitorder

const uint16_t gsm660_bitorder[]

◆ gsm690_10_2_bitorder

const uint16_t gsm690_10_2_bitorder[]

◆ gsm690_12_2_bitorder

const uint16_t gsm690_12_2_bitorder[]

◆ gsm690_4_75_bitorder

const uint16_t gsm690_4_75_bitorder[]

◆ gsm690_5_15_bitorder

const uint16_t gsm690_5_15_bitorder[]

◆ gsm690_5_9_bitorder

const uint16_t gsm690_5_9_bitorder[]

◆ gsm690_6_7_bitorder

const uint16_t gsm690_6_7_bitorder[]

◆ gsm690_7_4_bitorder

const uint16_t gsm690_7_4_bitorder[]

◆ gsm690_7_95_bitorder

const uint16_t gsm690_7_95_bitorder[]

◆ osmo_amr_type_names

const struct value_string osmo_amr_type_names[]