spandsp 0.0.6
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#include <stdlib.h>
#include <inttypes.h>
#include <string.h>
#include <stdio.h>
#include "floating_fudge.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/vector_int.h"
#include "spandsp/complex_vector_int.h"
#include "spandsp/async.h"
#include "spandsp/power_meter.h"
#include "spandsp/arctan2.h"
#include "spandsp/dds.h"
#include "spandsp/complex_filters.h"
#include "spandsp/v29rx.h"
#include "spandsp/private/logging.h"
#include "spandsp/private/v29rx.h"
#include "v29tx_constellation_maps.h"
#include "v29rx_floating_rrc.h"
Macros | |
#define | IAXMODEM_STUFF |
#define | CARRIER_NOMINAL_FREQ 1700.0f |
#define | BAUD_RATE 2400 |
#define | EQUALIZER_DELTA 0.21f |
#define | V29_TRAINING_SEG_2_LEN 128 |
#define | V29_TRAINING_SEG_3_LEN 384 |
#define | V29_TRAINING_SEG_4_LEN 48 |
#define | SIN_LOW_BAND_EDGE 0.382683432f |
#define | COS_LOW_BAND_EDGE 0.923879533f |
#define | SIN_HIGH_BAND_EDGE 0.760405966f |
#define | COS_HIGH_BAND_EDGE -0.649448048f |
#define | ALPHA 0.99f |
#define | SYNC_LOW_BAND_EDGE_COEFF_0 (2.0f*ALPHA*COS_LOW_BAND_EDGE) |
#define | SYNC_LOW_BAND_EDGE_COEFF_1 (-ALPHA*ALPHA) |
#define | SYNC_LOW_BAND_EDGE_COEFF_2 (-ALPHA*SIN_LOW_BAND_EDGE) |
#define | SYNC_HIGH_BAND_EDGE_COEFF_0 (2.0f*ALPHA*COS_HIGH_BAND_EDGE) |
#define | SYNC_HIGH_BAND_EDGE_COEFF_1 (-ALPHA*ALPHA) |
#define | SYNC_HIGH_BAND_EDGE_COEFF_2 (-ALPHA*SIN_HIGH_BAND_EDGE) |
#define | SYNC_MIXED_EDGES_COEFF_3 (-ALPHA*ALPHA*(SIN_HIGH_BAND_EDGE*COS_LOW_BAND_EDGE - SIN_LOW_BAND_EDGE*COS_HIGH_BAND_EDGE)) |
Functions | |
float | v29_rx_carrier_frequency (v29_rx_state_t *s) |
float | v29_rx_symbol_timing_correction (v29_rx_state_t *s) |
float | v29_rx_signal_power (v29_rx_state_t *s) |
void | v29_rx_signal_cutoff (v29_rx_state_t *s, float cutoff) |
int | v29_rx_equalizer_state (v29_rx_state_t *s, complexf_t **coeffs) |
Get a snapshot of the current equalizer coefficients. More... | |
int | v29_rx (v29_rx_state_t *s, const int16_t amp[], int len) |
int | v29_rx_fillin (v29_rx_state_t *s, int len) |
void | v29_rx_set_put_bit (v29_rx_state_t *s, put_bit_func_t put_bit, void *user_data) |
Change the put_bit function associated with a V.29 modem receive context. More... | |
void | v29_rx_set_modem_status_handler (v29_rx_state_t *s, modem_status_func_t handler, void *user_data) |
Change the modem status report function associated with a V.29 modem receive context. More... | |
logging_state_t * | v29_rx_get_logging_state (v29_rx_state_t *s) |
Get the logging context associated with a V.29 modem receive context. More... | |
int | v29_rx_restart (v29_rx_state_t *s, int bit_rate, int old_train) |
Reinitialise an existing V.29 modem receive context. More... | |
v29_rx_state_t * | v29_rx_init (v29_rx_state_t *s, int bit_rate, put_bit_func_t put_bit, void *user_data) |
Initialise a V.29 modem receive context. More... | |
int | v29_rx_release (v29_rx_state_t *s) |
Release a V.29 modem receive context. More... | |
int | v29_rx_free (v29_rx_state_t *s) |
Free a V.29 modem receive context. More... | |
void | v29_rx_set_qam_report_handler (v29_rx_state_t *s, qam_report_handler_t handler, void *user_data) |
#define BAUD_RATE 2400 |
The nominal baud or symbol rate
#define CARRIER_NOMINAL_FREQ 1700.0f |
The nominal frequency of the carrier, in Hertz
#define EQUALIZER_DELTA 0.21f |
The adaption rate coefficient for the equalizer
#define V29_TRAINING_SEG_2_LEN 128 |
The length of training segment 2, in symbols
#define V29_TRAINING_SEG_3_LEN 384 |
The length of training segment 3, in symbols
#define V29_TRAINING_SEG_4_LEN 48 |
The length of training segment 4, in symbols
float v29_rx_carrier_frequency | ( | v29_rx_state_t * | s | ) |
Get the current received carrier frequency.
s | The modem context. |
References v29_rx_state_s::carrier_phase_rate, and dds_frequencyf().
int v29_rx_equalizer_state | ( | v29_rx_state_t * | s, |
complexf_t ** | coeffs | ||
) |
Get a snapshot of the current equalizer coefficients.
Get a snapshot of the current equalizer coefficients.
s | The modem context. |
coeffs | The vector of complex coefficients. |
References v29_rx_state_s::eq_coeff.
int v29_rx_free | ( | v29_rx_state_t * | s | ) |
Free a V.29 modem receive context.
Free a V.29 modem receive context.
s | The modem context. |
logging_state_t * v29_rx_get_logging_state | ( | v29_rx_state_t * | s | ) |
Get the logging context associated with a V.29 modem receive context.
Get the logging context associated with a V.29 modem receive context.
s | The modem context. |
References v29_rx_state_s::logging.
v29_rx_state_t * v29_rx_init | ( | v29_rx_state_t * | s, |
int | bit_rate, | ||
put_bit_func_t | put_bit, | ||
void * | user_data | ||
) |
Initialise a V.29 modem receive context.
Initialise a V.29 modem receive context.
s | The modem context. |
bit_rate | The bit rate of the modem. Valid values are 4800, 7200 and 9600. |
put_bit | The callback routine used to put the received data. |
user_data | An opaque pointer passed to the put_bit routine. |
int v29_rx_release | ( | v29_rx_state_t * | s | ) |
Release a V.29 modem receive context.
Release a V.29 modem receive context.
s | The modem context. |
int v29_rx_restart | ( | v29_rx_state_t * | s, |
int | bit_rate, | ||
int | old_train | ||
) |
Reinitialise an existing V.29 modem receive context.
Reinitialise an existing V.29 modem receive context.
s | The modem context. |
bit_rate | The bit rate of the modem. Valid values are 4800, 7200 and 9600. |
old_train | TRUE if a previous trained values are to be reused. |
void v29_rx_set_modem_status_handler | ( | v29_rx_state_t * | s, |
modem_status_func_t | handler, | ||
void * | user_data | ||
) |
Change the modem status report function associated with a V.29 modem receive context.
Change the modem status report function associated with a V.29 modem receive context.
s | The modem context. |
handler | The callback routine used to report modem status changes. |
user_data | An opaque pointer. |
References v29_rx_state_s::status_handler, and v29_rx_state_s::status_user_data.
void v29_rx_set_put_bit | ( | v29_rx_state_t * | s, |
put_bit_func_t | put_bit, | ||
void * | user_data | ||
) |
Change the put_bit function associated with a V.29 modem receive context.
Change the put_bit function associated with a V.29 modem receive context.
s | The modem context. |
put_bit | The callback routine used to handle received bits. |
user_data | An opaque pointer. |
void v29_rx_set_qam_report_handler | ( | v29_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 v29_rx_signal_cutoff | ( | v29_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. |
References v29_rx_state_s::carrier_off_power, v29_rx_state_s::carrier_on_power, and power_meter_level_dbm0().
float v29_rx_signal_power | ( | v29_rx_state_t * | s | ) |
Get the current received signal power.
s | The modem context. |
References v29_rx_state_s::power, and power_meter_current_dbm0().
float v29_rx_symbol_timing_correction | ( | v29_rx_state_t * | s | ) |
Get the current symbol timing correction since startup.
s | The modem context. |
References v29_rx_state_s::total_baud_timing_correction.