#include <stdio.h>
#include <inttypes.h>
#include <stdlib.h>
#include <string.h>
#include <tgmath.h>
#include <math.h>
#include "floating_fudge.h"
#include "spandsp/telephony.h"
#include "spandsp/fast_convert.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/dds.h"
#include "spandsp/power_meter.h"
#include "spandsp/v29tx.h"
#include "spandsp/private/logging.h"
#include "spandsp/private/v29tx.h"
#include "v29tx_constellation_maps.h"
#include "v29tx_floating_rrc.h"
Defines | |
#define | CARRIER_NOMINAL_FREQ 1700.0f |
#define | V29_TRAINING_SEG_TEP 0 |
#define | V29_TRAINING_SEG_1 (V29_TRAINING_SEG_TEP + 480) |
#define | V29_TRAINING_SEG_2 (V29_TRAINING_SEG_1 + 48) |
#define | V29_TRAINING_SEG_3 (V29_TRAINING_SEG_2 + 128) |
#define | V29_TRAINING_SEG_4 (V29_TRAINING_SEG_3 + 384) |
#define | V29_TRAINING_END (V29_TRAINING_SEG_4 + 48) |
#define | V29_TRAINING_SHUTDOWN_END (V29_TRAINING_END + 32) |
Functions | |
SPAN_DECLARE_NONSTD (int) | |
Get the next bit of a transmitted serial bit stream. | |
void | v29_tx_power (v29_tx_state_t *s, float power) |
Adjust a V.29 modem transmit context's output power. | |
void | v29_tx_set_get_bit (v29_tx_state_t *s, get_bit_func_t get_bit, void *user_data) |
Change the get_bit function associated with a V.29 modem transmit context. | |
void | v29_tx_set_modem_status_handler (v29_tx_state_t *s, modem_tx_status_func_t handler, void *user_data) |
Change the modem status report function associated with a V.29 modem transmit context. | |
logging_state_t * | v29_tx_get_logging_state (v29_tx_state_t *s) |
Get the logging context associated with a V.29 modem transmit context. | |
int | v29_tx_restart (v29_tx_state_t *s, int bit_rate, int tep) |
Reinitialise an existing V.29 modem transmit context. | |
v29_tx_state_t * | v29_tx_init (v29_tx_state_t *s, int bit_rate, int tep, get_bit_func_t get_bit, void *user_data) |
Initialise a V.29 modem transmit context. | |
int | v29_tx_release (v29_tx_state_t *s) |
Release a V.29 modem transmit context. | |
int | v29_tx_free (v29_tx_state_t *s) |
Free a V.29 modem transmit context. |
#define CARRIER_NOMINAL_FREQ 1700.0f |
The nominal frequency of the carrier, in Hertz
#define V29_TRAINING_END (V29_TRAINING_SEG_4 + 48) |
The end of the training, in symbols
#define V29_TRAINING_SEG_1 (V29_TRAINING_SEG_TEP + 480) |
The start of training segment 1, in symbols
Referenced by v29_tx_restart().
#define V29_TRAINING_SEG_2 (V29_TRAINING_SEG_1 + 48) |
The start of training segment 2, in symbols
#define V29_TRAINING_SEG_3 (V29_TRAINING_SEG_2 + 128) |
The start of training segment 3, in symbols
#define V29_TRAINING_SEG_4 (V29_TRAINING_SEG_3 + 384) |
The start of training segment 4, in symbols
#define V29_TRAINING_SEG_TEP 0 |
The start of the optional TEP, that may preceed the actual training, in symbols
Referenced by v29_tx_restart().
#define V29_TRAINING_SHUTDOWN_END (V29_TRAINING_END + 32) |
The end of the shutdown sequence, in symbols
Referenced by SPAN_DECLARE_NONSTD().
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_complexf(), dds_complexi(), complexf_t::im, complexf_t::re, and V29_TRAINING_SHUTDOWN_END.
int v29_tx_free | ( | v29_tx_state_t * | s | ) |
Free a V.29 modem transmit context.
Free a V.29 modem transmit context.
s | The modem context. |
logging_state_t* v29_tx_get_logging_state | ( | v29_tx_state_t * | s | ) |
Get the logging context associated with a V.29 modem transmit context.
Get the logging context associated with a V.29 modem transmit context.
s | The modem context. |
v29_tx_state_t* v29_tx_init | ( | v29_tx_state_t * | s, | |
int | bit_rate, | |||
int | tep, | |||
get_bit_func_t | get_bit, | |||
void * | user_data | |||
) |
Initialise a V.29 modem transmit context.
Initialise a V.29 modem transmit context. This must be called before the first use of the context, to initialise its contents.
s | The modem context. | |
bit_rate | The bit rate of the modem. Valid values are 4800, 7200 and 9600. | |
tep | TRUE is the optional TEP tone is to be transmitted. | |
get_bit | The callback routine used to get the data to be transmitted. | |
user_data | An opaque pointer. |
References CARRIER_NOMINAL_FREQ, dds_phase_ratef(), v29_tx_power(), and v29_tx_restart().
void v29_tx_power | ( | v29_tx_state_t * | s, | |
float | power | |||
) |
Adjust a V.29 modem transmit context's output power.
Adjust a V.29 modem transmit context's power output.
s | The modem context. | |
power | The power level, in dBm0 |
Referenced by v29_tx_init().
int v29_tx_release | ( | v29_tx_state_t * | s | ) |
Release a V.29 modem transmit context.
Release a V.29 modem transmit context.
s | The modem context. |
int v29_tx_restart | ( | v29_tx_state_t * | s, | |
int | bit_rate, | |||
int | tep | |||
) |
Reinitialise an existing V.29 modem transmit context.
Reinitialise an existing V.29 modem transmit context, so it may be reused.
s | The modem context. | |
bit_rate | The bit rate of the modem. Valid values are 4800, 7200 and 9600. | |
tep | TRUE is the optional TEP tone is to be transmitted. |
References span_log(), V29_TRAINING_SEG_1, and V29_TRAINING_SEG_TEP.
Referenced by v29_tx_init().
void v29_tx_set_get_bit | ( | v29_tx_state_t * | s, | |
get_bit_func_t | get_bit, | |||
void * | user_data | |||
) |
Change the get_bit function associated with a V.29 modem transmit context.
Change the get_bit function associated with a V.29 modem transmit context.
s | The modem context. | |
get_bit | The callback routine used to get the data to be transmitted. | |
user_data | An opaque pointer. |
void v29_tx_set_modem_status_handler | ( | v29_tx_state_t * | s, | |
modem_tx_status_func_t | handler, | |||
void * | user_data | |||
) |
Change the modem status report function associated with a V.29 modem transmit context.
Change the modem status report function associated with a V.29 modem transmit context.
s | The modem context. | |
handler | The callback routine used to report modem status changes. | |
user_data | An opaque pointer. |