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/fast_convert.h"
#include "spandsp/math_fixed.h"
#include "spandsp/saturated.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/v17tx.h"
#include "spandsp/v17rx.h"
#include "spandsp/private/logging.h"
#include "spandsp/private/v17rx.h"
#include "v17_v32bis_rx_floating_rrc.h"
#include "v17_v32bis_tx_constellation_maps.h"
#include "v17_v32bis_rx_constellation_maps.h"
Macros | |
#define | IAXMODEM_STUFF |
#define | FP_SCALE(x) |
#define | CARRIER_NOMINAL_FREQ 1800.0f |
#define | BAUD_RATE 2400 |
#define | EQUALIZER_FAST_ADAPTION_DELTA (0.21f/V17_EQUALIZER_LEN) |
#define | EQUALIZER_MEDIUM_ADAPTION_DELTA (0.1f*EQUALIZER_FAST_ADAPTION_DELTA) |
#define | EQUALIZER_SLOW_ADAPTION_DELTA (0.03f*EQUALIZER_FAST_ADAPTION_DELTA) |
#define | V17_TRAINING_SEG_1_LEN 256 |
#define | V17_TRAINING_SEG_2_LEN 2976 |
#define | V17_TRAINING_SHORT_SEG_2_LEN 38 |
#define | V17_TRAINING_SEG_3_LEN 64 |
#define | V17_TRAINING_SEG_4A_LEN 15 |
#define | V17_TRAINING_SEG_4_LEN 48 |
#define | V17_BRIDGE_WORD 0x8880 |
#define | SIN_LOW_BAND_EDGE 0.453990499f |
#define | COS_LOW_BAND_EDGE 0.891006542f |
#define | SIN_HIGH_BAND_EDGE 0.707106781f |
#define | COS_HIGH_BAND_EDGE -0.707106781f |
#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 | v17_rx_carrier_frequency (v17_rx_state_t *s) |
float | v17_rx_symbol_timing_correction (v17_rx_state_t *s) |
float | v17_rx_signal_power (v17_rx_state_t *s) |
void | v17_rx_signal_cutoff (v17_rx_state_t *s, float cutoff) |
int | v17_rx_equalizer_state (v17_rx_state_t *s, complexf_t **coeffs) |
Get a snapshot of the current equalizer coefficients. | |
int | v17_rx (v17_rx_state_t *s, const int16_t amp[], int len) |
int | v17_rx_fillin (v17_rx_state_t *s, int len) |
void | v17_rx_set_put_bit (v17_rx_state_t *s, put_bit_func_t put_bit, void *user_data) |
Change the put_bit function associated with a V.17 modem receive context. | |
void | v17_rx_set_modem_status_handler (v17_rx_state_t *s, modem_status_func_t handler, void *user_data) |
Change the modem status report function associated with a V.17 modem receive context. | |
logging_state_t * | v17_rx_get_logging_state (v17_rx_state_t *s) |
Get the logging context associated with a V.17 modem receive context. | |
int | v17_rx_restart (v17_rx_state_t *s, int bit_rate, int short_train) |
Reinitialise an existing V.17 modem receive context. | |
v17_rx_state_t * | v17_rx_init (v17_rx_state_t *s, int bit_rate, put_bit_func_t put_bit, void *user_data) |
Initialise a V.17 modem receive context. | |
int | v17_rx_release (v17_rx_state_t *s) |
Release a V.17 modem receive context. | |
int | v17_rx_free (v17_rx_state_t *s) |
Free a V.17 modem receive context. | |
void | v17_rx_set_qam_report_handler (v17_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 1800.0f |
The nominal frequency of the carrier, in Hertz
Referenced by v17_rx_init(), v17_rx_restart(), v17_tx_init(), v27ter_rx_restart(), v27ter_tx_init(), v29_rx_restart(), and v29_tx_init().
#define EQUALIZER_FAST_ADAPTION_DELTA (0.21f/V17_EQUALIZER_LEN) |
The adaption rate coefficient for the equalizer during initial training
#define EQUALIZER_MEDIUM_ADAPTION_DELTA (0.1f*EQUALIZER_FAST_ADAPTION_DELTA) |
The adaption rate coefficient for the equalizer during initial fine tuning
#define EQUALIZER_SLOW_ADAPTION_DELTA (0.03f*EQUALIZER_FAST_ADAPTION_DELTA) |
The adaption rate coefficient for the equalizer during continuous fine tuning
#define FP_SCALE | ( | x | ) |
#define V17_BRIDGE_WORD 0x8880 |
The 16 bit pattern used in the bridge section of the training sequence
#define V17_TRAINING_SEG_1_LEN 256 |
The length of training segment 1, in symbols
#define V17_TRAINING_SEG_2_LEN 2976 |
The length of training segment 2 in long training mode, in symbols
#define V17_TRAINING_SEG_3_LEN 64 |
The length of training segment 3, in symbols
#define V17_TRAINING_SEG_4_LEN 48 |
The length of training segment 4, in symbols
#define V17_TRAINING_SEG_4A_LEN 15 |
The length of training segment 4A, in symbols
#define V17_TRAINING_SHORT_SEG_2_LEN 38 |
The length of training segment 2 in short training mode, in symbols
float v17_rx_carrier_frequency | ( | v17_rx_state_t * | s | ) |
Get the current received carrier frequency.
s | The modem context. |
References v17_rx_state_s::carrier_phase_rate, and dds_frequencyf().
int v17_rx_equalizer_state | ( | v17_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 v17_rx_state_s::eq_coeff.
int v17_rx_free | ( | v17_rx_state_t * | s | ) |
Free a V.17 modem receive context.
Free a V.17 modem receive context.
s | The modem context. |
logging_state_t * v17_rx_get_logging_state | ( | v17_rx_state_t * | s | ) |
Get the logging context associated with a V.17 modem receive context.
Get the logging context associated with a V.17 modem receive context.
s | The modem context. |
References v17_rx_state_s::logging.
v17_rx_state_t * v17_rx_init | ( | v17_rx_state_t * | s, |
int | bit_rate, | ||
put_bit_func_t | put_bit, | ||
void * | user_data ) |
Initialise a V.17 modem receive context.
Initialise a V.17 modem receive context.
s | The modem context. |
bit_rate | The bit rate of the modem. Valid values are 7200, 9600, 12000 and 14400. |
put_bit | The callback routine used to put the received data. |
user_data | An opaque pointer passed to the put_bit routine. |
References CARRIER_NOMINAL_FREQ, v17_rx_state_s::carrier_phase_rate_save, v17_rx_state_s::logging, v17_rx_state_s::put_bit, v17_rx_state_s::put_bit_user_data, v17_rx_state_s::short_train, v17_rx_restart(), and v17_rx_signal_cutoff().
int v17_rx_release | ( | v17_rx_state_t * | s | ) |
Release a V.17 modem receive context.
Release a V.17 modem receive context.
s | The modem context. |
int v17_rx_restart | ( | v17_rx_state_t * | s, |
int | bit_rate, | ||
int | short_train ) |
Reinitialise an existing V.17 modem receive context.
Reinitialise an existing V.17 modem receive context.
s | The modem context. |
bit_rate | The bit rate of the modem. Valid values are 7200, 9600, 12000 and 14400. |
short_train | TRUE if a short training sequence is expected. |
References v17_rx_state_s::agc_scaling, v17_rx_state_s::agc_scaling_save, v17_rx_state_s::angles, v17_rx_state_s::baud_half, v17_rx_state_s::baud_phase, v17_rx_state_s::bit_rate, v17_rx_state_s::bits_per_symbol, v17_rx_state_s::carrier_drop_pending, CARRIER_NOMINAL_FREQ, v17_rx_state_s::carrier_phase, v17_rx_state_s::carrier_phase_rate, v17_rx_state_s::carrier_phase_rate_save, v17_rx_state_s::carrier_track_i, v17_rx_state_s::carrier_track_p, v17_rx_state_s::constellation, dds_frequencyf(), v17_rx_state_s::diff, v17_rx_state_s::distances, v17_rx_state_s::full_path_to_past_state_locations, v17_rx_state_s::high_sample, v17_rx_state_s::last_sample, v17_rx_state_s::logging, v17_rx_state_s::low_samples, v17_rx_state_s::past_state_locations, v17_rx_state_s::power, power_meter_init(), v17_rx_state_s::rrc_filter, v17_rx_state_s::rrc_filter_step, v17_rx_state_s::scramble_reg, v17_rx_state_s::short_train, v17_rx_state_s::signal_present, v17_rx_state_s::space_map, span_log(), v17_rx_state_s::start_angles, v17_rx_state_s::symbol_sync_dc_filter, v17_rx_state_s::symbol_sync_high, v17_rx_state_s::symbol_sync_low, v17_rx_state_s::total_baud_timing_correction, v17_rx_state_s::training_count, v17_rx_state_s::training_error, v17_rx_state_s::training_stage, and v17_rx_state_s::trellis_ptr.
Referenced by v17_rx_init().
void v17_rx_set_modem_status_handler | ( | v17_rx_state_t * | s, |
modem_status_func_t | handler, | ||
void * | user_data ) |
Change the modem status report function associated with a V.17 modem receive context.
Change the modem status report function associated with a V.17 modem receive context.
s | The modem context. |
handler | The callback routine used to report modem status changes. |
user_data | An opaque pointer. |
References v17_rx_state_s::status_handler, and v17_rx_state_s::status_user_data.
void v17_rx_set_put_bit | ( | v17_rx_state_t * | s, |
put_bit_func_t | put_bit, | ||
void * | user_data ) |
Change the put_bit function associated with a V.17 modem receive context.
Change the put_bit function associated with a V.17 modem receive context.
s | The modem context. |
put_bit | The callback routine used to handle received bits. |
user_data | An opaque pointer. |
References v17_rx_state_s::put_bit, and v17_rx_state_s::put_bit_user_data.
void v17_rx_set_qam_report_handler | ( | v17_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. |
References v17_rx_state_s::qam_report, and v17_rx_state_s::qam_user_data.
void v17_rx_signal_cutoff | ( | v17_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 v17_rx_state_s::carrier_off_power, v17_rx_state_s::carrier_on_power, and power_meter_level_dbm0().
Referenced by v17_rx_init().
float v17_rx_signal_power | ( | v17_rx_state_t * | s | ) |
Get a current received signal power.
s | The modem context. |
References v17_rx_state_s::power, and power_meter_current_dbm0().
float v17_rx_symbol_timing_correction | ( | v17_rx_state_t * | s | ) |
Get the current symbol timing correction since startup.
s | The modem context. |
References v17_rx_state_s::total_baud_timing_correction.