#include <stdio.h>
#include <inttypes.h>
#include <stdlib.h>
#include <string.h>
#include "floating_fudge.h"
#include "spandsp/telephony.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/v22bis.h"
#include "v22bis_tx_floating_rrc.h"

Macros
#define	ms_to_symbols(t) (((t)*600)/1000)

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

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, 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, 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, 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_t *	v22bis_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, int 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_t *	v22bis_init (v22bis_state_t s, int bit_rate, int guard, int calling_party, get_bit_func_t get_bit, void get_bit_user_data, 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

int v22bis_free ( v22bis_state_t * s )

Free a V.22bis modem receive context.

Parameters

s	The modem context.

Returns: 0 for OK

int v22bis_get_current_bit_rate ( v22bis_state_t * s )

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

Parameters

s	The modem context.

logging_state_t* v22bis_get_logging_state ( v22bis_state_t * s )

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

Parameters

s	The modem context.

Returns: A pointer to the logging context

v22bis_state_t* v22bis_init	(	v22bis_state_t *	s,
		int	bit_rate,
		int	guard,
		int	calling_party,
		get_bit_func_t	get_bit,
		void *	get_bit_user_data,
		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

s	The modem context.
bit_rate	The bit rate of the modem. Valid values are 1200 and 2400.
guard	The guard tone option. 0 = none, 1 = 550Hz, 2 = 1800Hz.
calling_party	TRUE if this is the calling modem.
get_bit	The callback routine used to get the data to be transmitted.
put_bit	The callback routine used to get the data to be transmitted.
user_data	An opaque pointer, passed in calls to the get and put routines.

Returns: A pointer to the modem context, or NULL if there was a problem.

References v22bis_state_s::bit_rate, v22bis_state_s::calling_party, dds_phase_ratef(), v22bis_state_s::get_bit, v22bis_state_s::get_bit_user_data, v22bis_state_s::put_bit, v22bis_state_s::put_bit_user_data, v22bis_restart(), and v22bis_tx_power().

int v22bis_release ( v22bis_state_t * s )

Release a V.22bis modem receive context.

Parameters

s	The modem context.

Returns: 0 for OK

int v22bis_remote_loopback	(	v22bis_state_t *	s,
		int	enable
	)

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

Parameters

s	The modem context.
enable	TRUE to enable loopback, or FALSE to disable it.

Returns: 0 for OK, -1 for request reject.

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

s	The modem context.
bit_rate	The bit rate of the modem. Valid values are 1200 and 2400.

Returns: 0 for OK, -1 for request rejected.

References SIG_STATUS_MODEM_RETRAIN_OCCURRED, and span_log().

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

s	The modem context.
bit_rate	The bit rate of the modem. Valid values are 1200 and 2400.

Returns: 0 for OK, -1 for bad parameter.

References v22bis_state_s::bit_rate, and v22bis_rx_restart().

Referenced by v22bis_init().

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

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

Parameters

s	The modem context.
get_bit	The callback routine used to get the data to be transmitted.
user_data	An opaque pointer.

References v22bis_state_s::get_bit.

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

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

Parameters

s	The modem context.
handler	The callback routine used to report modem status changes.
user_data	An opaque pointer.

void v22bis_set_put_bit	(	v22bis_state_t *	s,
		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

s	The modem context.
put_bit	The callback routine used to process the data received.
user_data	An opaque pointer.

References v22bis_state_s::put_bit.

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

s	The modem context.
power	The power level, in dBm0

References dds_phase_ratef().

Referenced by v22bis_init().

Variable Documentation

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}
}

Macros

Functions

Variables

Function Documentation

Variable Documentation