ecu_fr.c File Reference

#include <stdbool.h>
#include <string.h>
#include <stdint.h>
#include <errno.h>
#include <osmocom/core/prbs.h>
#include <osmocom/codec/codec.h>
#include <osmocom/codec/ecu.h>
#include <osmocom/core/linuxlist.h>

Data Structures
struct	fr_ecu_state

Macros
#define	GSM611_XMAXC_REDUCE   4
#define	SID_PREFIX_LEN   5

Enumerations
enum	ecu_principal_state {   STATE_NO_DATA ,   STATE_SPEECH ,   STATE_SP_MUTING ,   STATE_SID ,   STATE_SID_MUTING }

Functions
static void	fr_ecu_input (struct fr_ecu_state *fr, const uint8_t *frame)
static bool	reduce_xmaxc (uint8_t *frame)
static void	random_grid_pos (struct fr_ecu_state *fr, uint8_t *frame)
static bool	reduce_xmaxc_sid (struct fr_ecu_state *fr)
static void	reemit_sid (struct fr_ecu_state *fr, uint8_t *frame)
static void	fr_ecu_output (struct fr_ecu_state *fr, uint8_t *frame)
static struct osmo_ecu_state *	ecu_fr_init (void *ctx, enum osmo_ecu_codec codec)
static struct fr_ecu_state *	_osmo_ecu_state_get_fr (struct osmo_ecu_state *st)
static int	ecu_fr_frame_in (struct osmo_ecu_state *st, bool bfi, const uint8_t *frame, unsigned int frame_bytes)
static int	ecu_fr_frame_out (struct osmo_ecu_state *st, uint8_t *frame_out)
static bool	ecu_fr_is_dtx_pause (struct osmo_ecu_state *st)
static	__attribute__ ((constructor))

Variables
static const struct osmo_ecu_ops	osmo_ecu_ops_fr

Macro Definition Documentation

GSM611_XMAXC_REDUCE

#define GSM611_XMAXC_REDUCE   4

SID_PREFIX_LEN

#define SID_PREFIX_LEN   5

Enumeration Type Documentation

ecu_principal_state

enum ecu_principal_state

Enumerator
STATE_NO_DATA
STATE_SPEECH
STATE_SP_MUTING
STATE_SID
STATE_SID_MUTING

Function Documentation

__attribute__()

static __attribute__ ( (constructor)  )

static

References OSMO_ECU_CODEC_FR, osmo_ecu_ops_fr, and osmo_ecu_register().

_osmo_ecu_state_get_fr()

static struct fr_ecu_state * _osmo_ecu_state_get_fr ( struct osmo_ecu_state *  st )

inlinestatic

References container_of, and fr_ecu_state::ecu_state.

Referenced by ecu_fr_frame_in(), ecu_fr_frame_out(), and ecu_fr_is_dtx_pause().

ecu_fr_frame_in()

static int ecu_fr_frame_in ( struct osmo_ecu_state *  st, bool  bfi, const uint8_t *  frame, unsigned int  frame_bytes  )

static

References _osmo_ecu_state_get_fr(), fr_ecu_input(), and GSM_FR_BYTES.

ecu_fr_frame_out()

static int ecu_fr_frame_out ( struct osmo_ecu_state *  st, uint8_t *  frame_out  )

static

References _osmo_ecu_state_get_fr(), fr_ecu_output(), and GSM_FR_BYTES.

ecu_fr_init()

static struct osmo_ecu_state * ecu_fr_init ( void *  ctx, enum osmo_ecu_codec  codec  )

static

References osmo_ecu_state::codec, fr_ecu_state::ecu_state, osmo_prbs15, osmo_prbs_state_init(), fr_ecu_state::pr_state, fr_ecu_state::prng, and STATE_NO_DATA.

ecu_fr_is_dtx_pause()

static bool ecu_fr_is_dtx_pause ( struct osmo_ecu_state *  st )

static

References _osmo_ecu_state_get_fr(), and fr_ecu_state::last_input_was_sid.

fr_ecu_input()

static void fr_ecu_input ( struct fr_ecu_state *  fr, const uint8_t *  frame  )

static

References GSM_FR_BYTES, fr_ecu_state::last_input_was_sid, OSMO_ASSERT, osmo_fr_sid_classify(), OSMO_GSM631_SID_CLASS_INVALID, OSMO_GSM631_SID_CLASS_SPEECH, OSMO_GSM631_SID_CLASS_VALID, fr_ecu_state::pr_state, fr_ecu_state::sid_prefix, SID_PREFIX_LEN, fr_ecu_state::sid_reemit_count, fr_ecu_state::sid_xmaxc, fr_ecu_state::speech_frame, STATE_SID, and STATE_SPEECH.

Referenced by ecu_fr_frame_in().

fr_ecu_output()

static void fr_ecu_output ( struct fr_ecu_state *  fr, uint8_t *  frame  )

static

References GSM_FR_BYTES, OSMO_ASSERT, osmo_gsm611_silence_frame, fr_ecu_state::pr_state, random_grid_pos(), reduce_xmaxc(), reduce_xmaxc_sid(), reemit_sid(), fr_ecu_state::sid_reemit_count, fr_ecu_state::speech_frame, STATE_NO_DATA, STATE_SID, STATE_SID_MUTING, STATE_SP_MUTING, and STATE_SPEECH.

Referenced by ecu_fr_frame_out().

random_grid_pos()

static void random_grid_pos ( struct fr_ecu_state *  fr, uint8_t *  frame  )

static

References osmo_prbs_get_ubit(), and fr_ecu_state::prng.

Referenced by fr_ecu_output().

reduce_xmaxc()

static bool reduce_xmaxc ( uint8_t *  frame )

static

References GSM611_XMAXC_REDUCE.

Referenced by fr_ecu_output().

reduce_xmaxc_sid()

static bool reduce_xmaxc_sid ( struct fr_ecu_state *  fr )

static

References GSM611_XMAXC_REDUCE, and fr_ecu_state::sid_xmaxc.

Referenced by fr_ecu_output().

reemit_sid()

static void reemit_sid ( struct fr_ecu_state *  fr, uint8_t *  frame  )

static

References fr_ecu_state::sid_prefix, SID_PREFIX_LEN, and fr_ecu_state::sid_xmaxc.

Referenced by fr_ecu_output().

Variable Documentation

osmo_ecu_ops_fr

const struct osmo_ecu_ops osmo_ecu_ops_fr

static

Initial value:

= {
        .init = ecu_fr_init,
        .frame_in = ecu_fr_frame_in,
        .frame_out = ecu_fr_frame_out,
        .is_dtx_pause = ecu_fr_is_dtx_pause,
}

Referenced by __attribute__().