#include <inttypes.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include "spandsp/telephony.h"
#include "spandsp/logging.h"
#include "spandsp/async.h"
#include "spandsp/power_meter.h"
#include "spandsp/arctan2.h"
#include "spandsp/complex.h"
#include "spandsp/dds.h"
#include "spandsp/complex_filters.h"
#include "spandsp/v29rx.h"
#include "spandsp/v27ter_rx.h"
Defines | |
#define | V27TER_TRAINING_SEG_5_LEN 1074 |
#define | V27TER_TRAINING_SEG_6_LEN 8 |
#define | EQUALIZER_DELTA 0.25 |
#define | PULSESHAPER_4800_GAIN 2.4975 |
#define | PULSESHAPER_4800_COEFF_SETS 8 |
#define | PULSESHAPER_2400_GAIN 2.223 |
#define | PULSESHAPER_2400_COEFF_SETS 12 |
Enumerations | |
enum | { TRAINING_STAGE_NORMAL_OPERATION = 0, TRAINING_STAGE_SYMBOL_ACQUISITION, TRAINING_STAGE_LOG_PHASE, TRAINING_STAGE_WAIT_FOR_HOP, TRAINING_STAGE_TRAIN_ON_ABAB, TRAINING_STAGE_TEST_ONES, TRAINING_STAGE_PARKED } |
Functions | |
float | v27ter_rx_carrier_frequency (v27ter_rx_state_t *s) |
float | v27ter_rx_symbol_timing_correction (v27ter_rx_state_t *s) |
float | v27ter_rx_signal_power (v27ter_rx_state_t *s) |
void | v27ter_rx_signal_cutoff (v27ter_rx_state_t *s, float cutoff) |
int | v27ter_rx_equalizer_state (v27ter_rx_state_t *s, complex_t **coeffs) |
Get a snapshot of the current equalizer coefficients. | |
int | v27ter_rx (v27ter_rx_state_t *s, const int16_t *amp, int len) |
Process a block of received V.27ter modem audio samples. | |
void | v27ter_rx_set_put_bit (v27ter_rx_state_t *s, put_bit_func_t put_bit, void *user_data) |
Change the put_bit function associated with a V.27ter modem receive context. | |
int | v27ter_rx_restart (v27ter_rx_state_t *s, int rate) |
Reinitialise an existing V.27ter modem receive context. | |
v27ter_rx_state_t * | v27ter_rx_init (v27ter_rx_state_t *s, int rate, put_bit_func_t put_bit, void *user_data) |
Initialise a V.27ter modem receive context. | |
int | v27ter_rx_release (v27ter_rx_state_t *s) |
Release a V.27ter modem receive context. | |
void | v27ter_rx_set_qam_report_handler (v27ter_rx_state_t *s, qam_report_handler_t *handler, void *user_data) |
int v27ter_rx | ( | v27ter_rx_state_t * | s, | |
const int16_t * | amp, | |||
int | len | |||
) |
Process a block of received V.27ter modem audio samples.
Process a block of received V.27ter modem audio samples.
s | The modem context. | |
amp | The audio sample buffer. | |
len | The number of samples in the buffer. |
float v27ter_rx_carrier_frequency | ( | v27ter_rx_state_t * | s | ) |
Get the current received carrier frequency.
s | The modem context. |
int v27ter_rx_equalizer_state | ( | v27ter_rx_state_t * | s, | |
complex_t ** | coeffs | |||
) |
Get a snapshot of the current equalizer coefficients.
Get a snapshot of the current equalizer coefficients.
coeffs | The vector of complex coefficients. |
v27ter_rx_state_t* v27ter_rx_init | ( | v27ter_rx_state_t * | s, | |
int | rate, | |||
put_bit_func_t | put_bit, | |||
void * | user_data | |||
) |
Initialise a V.27ter modem receive context.
Initialise a V.27ter modem receive context.
s | The modem context. | |
rate | The bit rate of the modem. Valid values are 2400 and 4800. | |
put_bit | The callback routine used to put the received data. | |
user_data | An opaque pointer passed to the put_bit routine. |
int v27ter_rx_release | ( | v27ter_rx_state_t * | s | ) |
Release a V.27ter modem receive context.
Release a V.27ter modem receive context.
s | The modem context. |
int v27ter_rx_restart | ( | v27ter_rx_state_t * | s, | |
int | rate | |||
) |
Reinitialise an existing V.27ter modem receive context.
Reinitialise an existing V.27ter modem receive context.
s | The modem context. | |
rate | The bit rate of the modem. Valid values are 2400 and 4800. |
void v27ter_rx_set_put_bit | ( | v27ter_rx_state_t * | s, | |
put_bit_func_t | put_bit, | |||
void * | user_data | |||
) |
Change the put_bit function associated with a V.27ter modem receive context.
Change the put_bit function associated with a V.27ter modem receive context.
s | The modem context. | |
put_bit | The callback routine used to handle received bits. | |
user_data | An opaque pointer. |
void v27ter_rx_set_qam_report_handler | ( | v27ter_rx_state_t * | s, | |
qam_report_handler_t * | handler, | |||
void * | user_data | |||
) |
Set a handler routine to process QAM status reports
s | The modem context. | |
handler | The handler routine. | |
user_data | An opaque pointer passed to the handler routine. |
void v27ter_rx_signal_cutoff | ( | v27ter_rx_state_t * | s, | |
float | cutoff | |||
) |
Set the power level at which the carrier detection will cut in
s | The modem context. | |
cutoff | The signal cutoff power, in dBm0. |
float v27ter_rx_signal_power | ( | v27ter_rx_state_t * | s | ) |
Get a current received signal power.
s | The modem context. |
float v27ter_rx_symbol_timing_correction | ( | v27ter_rx_state_t * | s | ) |
Get the current symbol timing correction since startup.
s | The modem context. |