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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. | |
| 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. | |
| 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. | |
| 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. | |
| int | v29_rx_restart (v29_rx_state_t *s, int bit_rate, int old_train) |
| Reinitialise an existing V.29 modem receive context. | |
| 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. | |
| int | v29_rx_release (v29_rx_state_t *s) |
| Release a V.29 modem receive context. | |
| int | v29_rx_free (v29_rx_state_t *s) |
| Free a V.29 modem receive context. | |
| 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. |
References v29_rx_state_s::logging, v29_rx_state_s::put_bit, v29_rx_state_s::put_bit_user_data, v29_rx_restart(), and v29_rx_signal_cutoff().
| 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. |
References v29_rx_state_s::agc_scaling, v29_rx_state_s::agc_scaling_save, v29_rx_state_s::baud_half, v29_rx_state_s::baud_phase, v29_rx_state_s::bit_rate, v29_rx_state_s::carrier_drop_pending, CARRIER_NOMINAL_FREQ, v29_rx_state_s::carrier_phase, v29_rx_state_s::carrier_phase_rate, v29_rx_state_s::carrier_phase_rate_save, v29_rx_state_s::carrier_track_i, v29_rx_state_s::carrier_track_p, v29_rx_state_s::constellation_state, v29_rx_state_s::eq_skip, v29_rx_state_s::high_sample, v29_rx_state_s::last_sample, v29_rx_state_s::low_samples, v29_rx_state_s::old_train, v29_rx_state_s::power, power_meter_init(), v29_rx_state_s::rrc_filter, v29_rx_state_s::rrc_filter_step, v29_rx_state_s::scramble_reg, v29_rx_state_s::signal_present, v29_rx_state_s::symbol_sync_dc_filter, v29_rx_state_s::symbol_sync_high, v29_rx_state_s::symbol_sync_low, v29_rx_state_s::total_baud_timing_correction, v29_rx_state_s::training_cd, v29_rx_state_s::training_count, v29_rx_state_s::training_scramble_reg, and v29_rx_state_s::training_stage.
Referenced by v29_rx_init().
| 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. |
References v29_rx_state_s::put_bit, and v29_rx_state_s::put_bit_user_data.
| 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. |
References v29_rx_state_s::qam_report, and v29_rx_state_s::qam_user_data.
| 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().
Referenced by v29_rx_init().
| 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.