#include <stdlib.h>
#include <inttypes.h>
#include <string.h>
#include <stdio.h>
#include <tgmath.h>
#include <math.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/v27ter_rx.h"
#include "spandsp/private/logging.h"
#include "spandsp/private/v27ter_rx.h"
#include "v27ter_rx_4800_floating_rrc.h"
#include "v27ter_rx_2400_floating_rrc.h"
Defines | |
#define | IAXMODEM_STUFF |
#define | CARRIER_NOMINAL_FREQ 1800.0f |
#define | BAUD_RATE_2400 1200 |
#define | BAUD_RATE_4800 1600 |
#define | EQUALIZER_DELTA 0.25f |
#define | V27TER_TRAINING_SEG_3_LEN 50 |
#define | V27TER_TRAINING_SEG_5_LEN 1074 |
#define | V27TER_TRAINING_SEG_6_LEN 8 |
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, complexf_t **coeffs) |
Get a snapshot of the current equalizer coefficients. | |
SPAN_DECLARE_NONSTD (int) | |
Get the next bit of a transmitted serial bit stream. | |
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. | |
void | v27ter_rx_set_modem_status_handler (v27ter_rx_state_t *s, modem_tx_status_func_t handler, void *user_data) |
Change the modem status report function associated with a V.27ter modem receive context. | |
logging_state_t * | v27ter_rx_get_logging_state (v27ter_rx_state_t *s) |
Get the logging context associated with a V.27ter modem receive context. | |
int | v27ter_rx_restart (v27ter_rx_state_t *s, int bit_rate, int old_train) |
Reinitialise an existing V.27ter modem receive context. | |
v27ter_rx_state_t * | v27ter_rx_init (v27ter_rx_state_t *s, int bit_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. | |
int | v27ter_rx_free (v27ter_rx_state_t *s) |
Free 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) |
#define BAUD_RATE_2400 1200 |
The nominal baud or symbol rate in 2400bps mode
#define BAUD_RATE_4800 1600 |
The nominal baud or symbol rate in 4800bps mode
#define CARRIER_NOMINAL_FREQ 1800.0f |
The nominal frequency of the carrier, in Hertz
#define EQUALIZER_DELTA 0.25f |
The adaption rate coefficient for the equalizer
#define V27TER_TRAINING_SEG_3_LEN 50 |
The length of training segment 3, in symbols
#define V27TER_TRAINING_SEG_5_LEN 1074 |
The length of training segment 5, in symbols
#define V27TER_TRAINING_SEG_6_LEN 8 |
The length of training segment 6, in symbols
SPAN_DECLARE_NONSTD | ( | int | ) |
Get the next bit of a transmitted serial bit stream.
Get the next bit of data from a T.38 rate adapting non-ECM buffer context.
Get a bit of received non-ECM image data.
Get the next bit of a transmitted serial bit stream.
user_data | An opaque point which must point to a transmitter context. |
Get the next bit of a transmitted serial bit stream.
Process a block of received V.8 audio samples.
Fake processing of a missing block of received V.29 modem audio samples.
Fake processing of a missing block of received V.27ter modem audio samples.
Generate a block of V.22bis modem audio samples.
Fake processing of a missing block of received V.22bis modem audio samples.
Process a block of received V.18 audio samples.
Fake processing of a missing block of received V.17 modem audio samples.
Generate a block of FAX audio samples.
Apply fake received audio processing.
Generate a block of T.31 modem audio samples.
Fake processing of a missing block of received T.31 modem audio samples.
Dummy receive fillin callback.
Dummy receive callback.
Process a block of samples through an instance of the modem connect tones detector.
Get the next sequence of bytes for transmission.
Get the next byte for transmission.
Fake processing of a missing block of received FSK modem audio samples.
Process a block of received FSK modem audio samples.
Apply T.30 transmit processing to generate a block of audio samples.
Apply fake T.30 receive processing when a block of audio samples is missing (e.g due to packet loss).
s | The FAX context. | |
len | The number of samples to fake. |
Apply T.30 transmit processing to generate a block of audio samples.
s | The FAX context. | |
amp | The audio sample buffer. | |
max_len | The number of samples to be generated. |
Process a block of received FSK modem audio samples.
s | The modem context. | |
amp | The audio sample buffer. | |
len | The number of samples in the buffer. |
Fake processing of a missing block of received FSK modem audio samples (e.g due to packet loss).
s | The modem context. | |
len | The number of samples to fake. |
s | A pointer to an HDLC transmitter context. |
s | A pointer to an HDLC transmitter context. | |
buf | The buffer for the data. | |
max_len | The number of bytes to get. |
s | The context. | |
amp | An array of signal samples. | |
len | The number of samples in the array. |
A dummy routine to use as a receive callback, when we aren't really trying to process what is received. It just absorbs and ignores the data.
user_data | The context. | |
amp | The signal.buffer | |
len | The length of the signal buffer |
A dummy routine to use as a receive fillin callback, when we aren't really trying to process what is received. It just absorbs and ignores the request.
user_data | The context. | |
len | The length of the signal buffer |
Fake processing of a missing block of received T.31 modem audio samples (e.g due to packet loss).
s | The T.31 modem context. | |
len | The number of samples to fake. |
Generate a block of T.31 modem audio samples.
s | The T.31 modem context. | |
amp | The audio sample buffer. | |
max_len | The number of samples to be generated. |
Apply fake processing when a block of audio samples is missing (e.g due to packet loss).
s | The T.38 context. | |
len | The number of samples to fake. |
Generate a block of FAX audio samples.
s | The T.38 context. | |
amp | The audio sample buffer. | |
max_len | The number of samples to be generated. |
Fake processing of a missing block of received V.17 modem audio samples. (e.g due to packet loss).
s | The modem context. | |
len | The number of samples to fake. |
Process a block of received V.18 audio samples.
s | The V.18 context. | |
amp | The audio sample buffer. | |
len | The number of samples in the buffer. |
Fake processing of a missing block of received V.22bis modem audio samples. (e.g due to packet loss).
s | The modem context. | |
len | The number of samples to fake. |
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. |
Fake processing of a missing block of received V.27ter modem audio samples. (e.g due to packet loss).
s | The modem context. | |
len | The number of samples to fake. |
Fake processing of a missing block of received V.29 modem audio samples. (e.g due to packet loss).
s | The modem context. | |
len | The number of samples to fake. |
Process a block of received V.8 audio samples.
s | The V.8 context. | |
amp | The audio sample buffer. | |
len | The number of samples in the buffer. |
Get the next bit of a transmitted serial bit stream.
Apply T.30 transmit processing to generate a block of audio samples.
Apply fake T.30 receive processing.
Apply T.30 receive processing to a block of audio samples.
s | The FAX context. | |
amp | The audio sample buffer. | |
len | The number of samples in the buffer. |
Apply fake T.30 receive processing when a block of audio samples is missing (e.g due to packet loss).
s | The FAX context. | |
len | The number of samples to fake. |
Apply T.30 transmit processing to generate a block of audio samples.
s | The FAX context. | |
amp | The audio sample buffer. | |
max_len | The number of samples to be generated. |
Get the next bit of a transmitted serial bit stream.
Fake processing of a missing block of received FSK modem audio samples.
Process a block of received FSK modem audio samples.
Generate a block of FSK modem audio samples.
s | The modem context. | |
amp | The audio sample buffer. | |
len | The number of samples to be generated. |
Process a block of received FSK modem audio samples.
s | The modem context. | |
amp | The audio sample buffer. | |
len | The number of samples in the buffer. |
Fake processing of a missing block of received FSK modem audio samples (e.g due to packet loss).
s | The modem context. | |
len | The number of samples to fake. |
Get the next bit of a transmitted serial bit stream.
Get the next sequence of bytes for transmission.
Get the next byte for transmission.
s | A pointer to an HDLC transmitter context. |
s | A pointer to an HDLC transmitter context. |
s | A pointer to an HDLC transmitter context. | |
buf | The buffer for the data. | |
max_len | The number of bytes to get. |
Get the next bit of a transmitted serial bit stream.
Process a block of samples through an instance of the modem connect tones detector.
s | The context. | |
amp | An array of signal samples. | |
len | The number of samples to generate. |
s | The context. | |
amp | An array of signal samples. | |
len | The number of samples in the array. |
Get the next bit of a transmitted serial bit stream.
Dummy receive fillin callback.
Dummy receive callback.
Generate a block of silent audio samples.
s | The silence generator context. | |
amp | The audio sample buffer. | |
max_len | The number of samples to be generated. |
A dummy routine to use as a receive callback, when we aren't really trying to process what is received. It just absorbs and ignores the data.
user_data | The context. | |
amp | The signal.buffer | |
len | The length of the signal buffer |
A dummy routine to use as a receive fillin callback, when we aren't really trying to process what is received. It just absorbs and ignores the request.
user_data | The context. | |
len | The length of the signal buffer |
Get the next bit of a transmitted serial bit stream.
Generate a block of T.31 modem audio samples.
Fake processing of a missing block of received T.31 modem audio samples.
Process a block of received T.31 modem audio samples.
s | The T.31 modem context. | |
amp | The audio sample buffer. | |
len | The number of samples in the buffer. |
Fake processing of a missing block of received T.31 modem audio samples (e.g due to packet loss).
s | The T.31 modem context. | |
len | The number of samples to fake. |
Generate a block of T.31 modem audio samples.
s | The T.31 modem context. | |
amp | The audio sample buffer. | |
max_len | The number of samples to be generated. |
Get the next bit of a transmitted serial bit stream.
Generate a block of FAX audio samples.
Apply fake received audio processing.
Process a block of received FAX audio samples.
s | The T.38 context. | |
amp | The audio sample buffer. | |
len | The number of samples in the buffer. |
Apply fake processing when a block of audio samples is missing (e.g due to packet loss).
s | The T.38 context. | |
len | The number of samples to fake. |
Generate a block of FAX audio samples.
s | The T.38 context. | |
amp | The audio sample buffer. | |
max_len | The number of samples to be generated. |
Get the next bit of a transmitted serial bit stream.
Fake processing of a missing block of received V.17 modem audio samples.
Process a block of received V.17 modem audio samples.
s | The modem context. | |
amp | The audio sample buffer. | |
len | The number of samples in the buffer. |
Fake processing of a missing block of received V.17 modem audio samples. (e.g due to packet loss).
s | The modem context. | |
len | The number of samples to fake. |
Get the next bit of a transmitted serial bit stream.
Generate a block of V.17 modem audio samples.
s | The modem context. | |
amp | The audio sample buffer. | |
len | The number of samples to be generated. |
Get the next bit of a transmitted serial bit stream.
Process a block of received V.18 audio samples.
Generate a block of V.18 audio samples.
s | The V.18 context. | |
amp | The audio sample buffer. | |
max_len | The number of samples to be generated. |
Process a block of received V.18 audio samples.
s | The V.18 context. | |
amp | The audio sample buffer. | |
len | The number of samples in the buffer. |
Get the next bit of a transmitted serial bit stream.
Generate a block of V.22bis modem audio samples.
Fake processing of a missing block of received V.22bis modem audio samples.
Process a block of received V.22bis modem audio samples.
s | The modem context. | |
amp | The audio sample buffer. | |
len | The number of samples in the buffer. |
Fake processing of a missing block of received V.22bis modem audio samples. (e.g due to packet loss).
s | The modem context. | |
len | The number of samples to fake. |
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. |
Get the next bit of a transmitted serial bit stream.
Fake processing of a missing 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. |
Fake processing of a missing block of received V.27ter modem audio samples. (e.g due to packet loss).
s | The modem context. | |
len | The number of samples to fake. |
Get the next bit of a transmitted serial bit stream.
Generate a block of V.27ter modem audio samples.
s | The modem context. | |
amp | The audio sample buffer. | |
len | The number of samples to be generated. |
Get the next bit of a transmitted serial bit stream.
Fake processing of a missing block of received V.29 modem audio samples.
Process a block of received V.29 modem audio samples.
s | The modem context. | |
amp | The audio sample buffer. | |
len | The number of samples in the buffer. |
Fake processing of a missing block of received V.29 modem audio samples. (e.g due to packet loss).
s | The modem context. | |
len | The number of samples to fake. |
Get the next bit of a transmitted serial bit stream.
Generate a block of V.29 modem audio samples.
s | The modem context. | |
amp | The audio sample buffer. | |
len | The number of samples to be generated. |
Get the next bit of a transmitted serial bit stream.
Process a block of received V.8 audio samples.
Generate a block of V.8 audio samples.
s | The V.8 context. | |
amp | The audio sample buffer. | |
max_len | The number of samples to be generated. |
Process a block of received V.8 audio samples.
s | The V.8 context. | |
amp | The audio sample buffer. | |
len | The number of samples in the buffer. |
References dds_advance(), dds_advancef(), and span_log().
float v27ter_rx_carrier_frequency | ( | v27ter_rx_state_t * | s | ) |
Get the current received carrier frequency.
s | The modem context. |
References dds_frequencyf().
int v27ter_rx_equalizer_state | ( | v27ter_rx_state_t * | s, | |
complexf_t ** | coeffs | |||
) |
Get a snapshot of the current equalizer coefficients.
Get a snapshot of the current equalizer coefficients.
coeffs | The vector of complex coefficients. |
int v27ter_rx_free | ( | v27ter_rx_state_t * | s | ) |
Free a V.27ter modem receive context.
Free a V.27ter modem receive context.
s | The modem context. |
logging_state_t* v27ter_rx_get_logging_state | ( | v27ter_rx_state_t * | s | ) |
Get the logging context associated with a V.27ter modem receive context.
Get the logging context associated with a V.27ter modem receive context.
s | The modem context. |
v27ter_rx_state_t* v27ter_rx_init | ( | v27ter_rx_state_t * | s, | |
int | bit_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. | |
bit_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. |
References v27ter_rx_restart(), and v27ter_rx_signal_cutoff().
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 | bit_rate, | |||
int | old_train | |||
) |
Reinitialise an existing V.27ter modem receive context.
Reinitialise an existing V.27ter modem receive context.
s | The modem context. | |
bit_rate | The bit rate of the modem. Valid values are 2400 and 4800. | |
old_train | TRUE if a previous trained values are to be reused. |
References CARRIER_NOMINAL_FREQ, dds_phase_ratef(), power_meter_init(), and span_log().
Referenced by v27ter_rx_init().
void v27ter_rx_set_modem_status_handler | ( | v27ter_rx_state_t * | s, | |
modem_rx_status_func_t | handler, | |||
void * | user_data | |||
) |
Change the modem status report function associated with a V.27ter modem receive context.
Change the modem status report function associated with a V.27ter modem receive context.
s | The modem context. | |
handler | The callback routine used to report modem status changes. | |
user_data | An opaque pointer. |
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. |
References power_meter_level_dbm0().
Referenced by v27ter_rx_init().
float v27ter_rx_signal_power | ( | v27ter_rx_state_t * | s | ) |
Get a current received signal power.
s | The modem context. |
References power_meter_current_dbm0().
float v27ter_rx_symbol_timing_correction | ( | v27ter_rx_state_t * | s | ) |
Get the current symbol timing correction since startup.
s | The modem context. |