#include <stdio.h>
#include <inttypes.h>
#include <stdlib.h>
#include <string.h>
#include "spandsp/telephony.h"
#include "spandsp/logging.h"
#include "spandsp/complex.h"
#include "spandsp/vector_float.h"
#include "spandsp/complex_vector_float.h"
#include "spandsp/async.h"
#include "spandsp/dds.h"
#include "spandsp/power_meter.h"
#include "spandsp/v29rx.h"
#include "spandsp/v22bis.h"
Defines | |
#define | ms_to_symbols(t) (((t)*600)/1000) |
#define | PULSESHAPER_GAIN (40.000612087f/40.0f) |
#define | PULSESHAPER_COEFF_SETS 40 |
Enumerations | |
enum | { V22BIS_TRAINING_STAGE_NORMAL_OPERATION = 0, V22BIS_TRAINING_STAGE_INITIAL_SILENCE, V22BIS_TRAINING_STAGE_UNSCRAMBLED_ONES, V22BIS_TRAINING_STAGE_UNSCRAMBLED_0011, V22BIS_TRAINING_STAGE_SCRAMBLED_ONES_AT_1200, V22BIS_TRAINING_STAGE_SCRAMBLED_ONES_AT_2400, V22BIS_TRAINING_STAGE_PARKED } |
Functions | |
int | v22bis_tx (v22bis_state_t *s, int16_t amp[], int len) |
Generate a block of V.22bis modem audio samples. | |
void | v22bis_tx_power (v22bis_state_t *s, float power) |
Adjust a V.22bis modem transmit context's output power. | |
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. | |
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. | |
int | v22bis_restart (v22bis_state_t *s, int bit_rate) |
Reinitialise an existing V.22bis modem context. | |
v22bis_state_t * | v22bis_init (v22bis_state_t *s, int bit_rate, int guard, int caller, get_bit_func_t get_bit, put_bit_func_t put_bit, void *user_data) |
Initialise a V.22bis modem context. | |
Variables | |
const complexf_t | v22bis_constellation [16] |
v22bis_state_t* v22bis_init | ( | v22bis_state_t * | s, | |
int | bit_rate, | |||
int | guard, | |||
int | caller, | |||
get_bit_func_t | get_bit, | |||
put_bit_func_t | put_bit, | |||
void * | 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.
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. | |
caller | 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. |
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.
s | The modem context. | |
bit_rate | The bit rate of the modem. Valid values are 1200 and 2400. |
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.
Change the get_bit function associated with a V.2bis modem context.
s | The modem context. | |
get_bit | The callback routine used to get the data to be transmitted. | |
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.2bis modem context.
s | The modem context. | |
put_bit | The callback routine used to process the data received. | |
user_data | An opaque pointer. |
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.
s | The modem context. | |
amp | The audio sample buffer. | |
len | The number of samples to be generated. |
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.
s | The modem context. | |
power | The power level, in dBm0 |
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} }