spandsp  3.0.0
v22bis_tx.c File Reference
#include <stdio.h>
#include <inttypes.h>
#include <stdlib.h>
#include <string.h>
#include "spandsp/stdbool.h"
#include "floating_fudge.h"
#include "spandsp/telephony.h"
#include "spandsp/alloc.h"
#include "spandsp/fast_convert.h"
#include "spandsp/logging.h"
#include "spandsp/complex.h"
#include "spandsp/vector_float.h"
#include "spandsp/complex_vector_float.h"
#include "spandsp/vector_int.h"
#include "spandsp/complex_vector_int.h"
#include "spandsp/async.h"
#include "spandsp/dds.h"
#include "spandsp/power_meter.h"
#include "spandsp/v29rx.h"
#include "spandsp/v22bis.h"
#include "spandsp/private/logging.h"
#include "spandsp/private/power_meter.h"
#include "spandsp/private/v22bis.h"
#include "v22bis_tx_rrc.h"

Macros

#define FP_SCALE(x)   (x)
 
#define ms_to_symbols(t)   (((t)*600)/1000)
 
#define LOW_CARRIER_FREQUENCY   1200.0f
 
#define HIGH_CARRIER_FREQUENCY   2400.0f
 

Functions

int v22bis_tx (v22bis_state_t *s, int16_t amp[], int len)
 Generate a block of V.22bis modem audio samples. More...
 
void v22bis_tx_power (v22bis_state_t *s, float power)
 Adjust a V.22bis modem transmit context's output power. More...
 
void v22bis_set_get_bit (v22bis_state_t *s, span_get_bit_func_t get_bit, void *user_data)
 Change the get_bit function associated with a V.22bis modem context. More...
 
void v22bis_set_put_bit (v22bis_state_t *s, span_put_bit_func_t put_bit, void *user_data)
 Change the put_bit function associated with a V.22bis modem context. More...
 
void v22bis_set_modem_status_handler (v22bis_state_t *s, span_modem_status_func_t handler, void *user_data)
 Change the modem status report function associated with a V.22bis modem receive context. More...
 
logging_state_tv22bis_get_logging_state (v22bis_state_t *s)
 Get the logging context associated with a V.22bis modem context. More...
 
int v22bis_restart (v22bis_state_t *s, int bit_rate)
 Reinitialise an existing V.22bis modem context. More...
 
int v22bis_request_retrain (v22bis_state_t *s, int bit_rate)
 Request a retrain for a V.22bis modem context. More...
 
int v22bis_remote_loopback (v22bis_state_t *s, bool enable)
 Request a loopback 2 for a V.22bis modem context. More...
 
int v22bis_get_current_bit_rate (v22bis_state_t *s)
 Report the current operating bit rate of a V.22bis modem context. More...
 
v22bis_state_tv22bis_init (v22bis_state_t *s, int bit_rate, int options, bool calling_party, span_get_bit_func_t get_bit, void *get_bit_user_data, span_put_bit_func_t put_bit, void *put_bit_user_data)
 Initialise a V.22bis modem context. More...
 
int v22bis_release (v22bis_state_t *s)
 Release a V.22bis modem receive context. More...
 
int v22bis_free (v22bis_state_t *s)
 Free a V.22bis modem receive context. More...
 

Variables

const complexf_t v22bis_constellation [16]
 

Function Documentation

◆ v22bis_free()

int v22bis_free ( v22bis_state_t s)

Free a V.22bis modem receive context.

Free a V.22bis modem receive context.

Parameters
sThe modem context.
Returns
0 for OK

◆ v22bis_get_current_bit_rate()

int v22bis_get_current_bit_rate ( v22bis_state_t s)

Report the current operating bit rate of a V.22bis modem context.

Report the current operating bit rate of a V.22bis modem context.

Parameters
sThe modem context.

◆ v22bis_get_logging_state()

logging_state_t* v22bis_get_logging_state ( v22bis_state_t s)

Get the logging context associated with a V.22bis modem context.

Get the logging context associated with a V.22bis modem context.

Parameters
sThe modem context.
Returns
A pointer to the logging context

References v22bis_state_s::logging.

◆ v22bis_init()

v22bis_state_t* v22bis_init ( v22bis_state_t s,
int  bit_rate,
int  options,
bool  calling_party,
span_get_bit_func_t  get_bit,
void *  get_bit_user_data,
span_put_bit_func_t  put_bit,
void *  put_bit_user_data 
)

Initialise a V.22bis modem context.

Initialise a V.22bis modem context. This must be called before the first use of the context, to initialise its contents.

Parameters
sThe modem context.
bit_rateThe bit rate of the modem. Valid values are 1200 and 2400.
optionsGuard tone and other options.
calling_partyTrue if this is the calling modem.
get_bitThe callback routine used to get the data to be transmitted.
get_bit_user_dataAn opaque pointer, passed in calls to the get_bit routine.
put_bitThe callback routine used to put the data received.
put_bit_user_dataAn opaque pointer, passed in calls to the put_bit routine.
Returns
A pointer to the modem context, or NULL if there was a problem.

◆ v22bis_release()

int v22bis_release ( v22bis_state_t s)

Release a V.22bis modem receive context.

Release a V.22bis modem receive context.

Parameters
sThe modem context.
Returns
0 for OK

◆ v22bis_remote_loopback()

int v22bis_remote_loopback ( v22bis_state_t s,
bool  enable 
)

Request a loopback 2 for a V.22bis modem context.

Request a loopback 2 for a V.22bis modem context.

Parameters
sThe modem context.
enableTrue to enable loopback, or false to disable it.
Returns
0 for OK, -1 for request reject.

◆ v22bis_request_retrain()

int v22bis_request_retrain ( v22bis_state_t s,
int  bit_rate 
)

Request a retrain for a V.22bis modem context.

Request a retrain for a V.22bis modem context. A rate change may also be requested.

Parameters
sThe modem context.
bit_rateThe bit rate of the modem. Valid values are 1200 and 2400.
Returns
0 for OK, -1 for request rejected.

◆ v22bis_restart()

int v22bis_restart ( v22bis_state_t s,
int  bit_rate 
)

Reinitialise an existing V.22bis modem context.

Reinitialise an existing V.22bis modem context, so it may be reused.

Parameters
sThe modem context.
bit_rateThe bit rate of the modem. Valid values are 1200 and 2400.
Returns
0 for OK, -1 for bad parameter.

◆ v22bis_set_get_bit()

void v22bis_set_get_bit ( v22bis_state_t s,
span_get_bit_func_t  get_bit,
void *  user_data 
)

Change the get_bit function associated with a V.22bis modem context.

Change the get_bit function associated with a V.22bis modem context.

Parameters
sThe modem context.
get_bitThe callback routine used to get the data to be transmitted.
user_dataAn opaque pointer.

◆ v22bis_set_modem_status_handler()

void v22bis_set_modem_status_handler ( v22bis_state_t s,
span_modem_status_func_t  handler,
void *  user_data 
)

Change the modem status report function associated with a V.22bis modem receive context.

Change the modem status report function associated with a V.22bis modem receive context.

Parameters
sThe modem context.
handlerThe callback routine used to report modem status changes.
user_dataAn opaque pointer.

References v22bis_state_s::status_handler, and v22bis_state_s::status_user_data.

◆ v22bis_set_put_bit()

void v22bis_set_put_bit ( v22bis_state_t s,
span_put_bit_func_t  put_bit,
void *  user_data 
)

Change the put_bit function associated with a V.22bis modem context.

Change the get_bit function associated with a V.22bis modem context.

Parameters
sThe modem context.
put_bitThe callback routine used to process the data received.
user_dataAn opaque pointer.

◆ v22bis_tx()

int v22bis_tx ( v22bis_state_t s,
int16_t  amp[],
int  len 
)

Generate a block of V.22bis modem audio samples.

Generate a block of V.22bis modem audio samples.

Parameters
sThe modem context.
ampThe audio sample buffer.
lenThe number of samples to be generated.
Returns
The number of samples actually generated.

◆ v22bis_tx_power()

void v22bis_tx_power ( v22bis_state_t s,
float  power 
)

Adjust a V.22bis modem transmit context's output power.

Adjust a V.22bis modem transmit context's power output.

Parameters
sThe modem context.
powerThe power level, in dBm0

Variable Documentation

◆ v22bis_constellation

const complexf_t v22bis_constellation[16]
Initial value:
=
{
{( 1.0f ), ( 1.0f )},
{( 3.0f ), ( 1.0f )},
{( 1.0f ), ( 3.0f )},
{( 3.0f ), ( 3.0f )},
{( -1.0f ), ( 1.0f )},
{( -1.0f ), ( 3.0f )},
{( -3.0f ), ( 1.0f )},
{( -3.0f ), ( 3.0f )},
{( -1.0f ), ( -1.0f )},
{( -3.0f ), ( -1.0f )},
{( -1.0f ), ( -3.0f )},
{( -3.0f ), ( -3.0f )},
{( 1.0f ), ( -1.0f )},
{( 1.0f ), ( -3.0f )},
{( 3.0f ), ( -1.0f )},
{( 3.0f ), ( -3.0f )}
}