v27ter_tx.c File Reference

#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/v27ter_tx.h"
#include "spandsp/private/logging.h"
#include "spandsp/private/v27ter_tx.h"
#include "v27ter_tx_4800_floating_rrc.h"
#include "v27ter_tx_2400_floating_rrc.h"

Defines

#define CARRIER_NOMINAL_FREQ   1800.0f
#define V27TER_TRAINING_SEG_1   0
#define V27TER_TRAINING_SEG_2   (V27TER_TRAINING_SEG_1 + 320)
#define V27TER_TRAINING_SEG_3   (V27TER_TRAINING_SEG_2 + 32)
#define V27TER_TRAINING_SEG_4   (V27TER_TRAINING_SEG_3 + 50)
#define V27TER_TRAINING_SEG_5   (V27TER_TRAINING_SEG_4 + 1074)
#define V27TER_TRAINING_END   (V27TER_TRAINING_SEG_5 + 8)
#define V27TER_TRAINING_SHUTDOWN_END   (V27TER_TRAINING_END + 32)

Functions

 SPAN_DECLARE_NONSTD (int)
 Get the next bit of a transmitted serial bit stream.
void v27ter_tx_power (v27ter_tx_state_t *s, float power)
 Adjust a V.27ter modem transmit context's output power.
void v27ter_tx_set_get_bit (v27ter_tx_state_t *s, get_bit_func_t get_bit, void *user_data)
 Change the get_bit function associated with a V.27ter modem transmit context.
void v27ter_tx_set_modem_status_handler (v27ter_tx_state_t *s, modem_tx_status_func_t handler, void *user_data)
 Change the modem status report function associated with a V.27ter modem transmit context.
logging_state_tv27ter_tx_get_logging_state (v27ter_tx_state_t *s)
 Get the logging context associated with a V.27ter modem transmit context.
int v27ter_tx_restart (v27ter_tx_state_t *s, int bit_rate, int tep)
 Reinitialise an existing V.27ter modem transmit context.
v27ter_tx_state_tv27ter_tx_init (v27ter_tx_state_t *s, int bit_rate, int tep, get_bit_func_t get_bit, void *user_data)
 Initialise a V.27ter modem transmit context.
int v27ter_tx_release (v27ter_tx_state_t *s)
 Release a V.27ter modem transmit context.
int v27ter_tx_free (v27ter_tx_state_t *s)
 Free a V.27ter modem transmit context.

Detailed Description


Define Documentation

#define CARRIER_NOMINAL_FREQ   1800.0f

The nominal frequency of the carrier, in Hertz

#define V27TER_TRAINING_END   (V27TER_TRAINING_SEG_5 + 8)

The end of the training, in symbols

#define V27TER_TRAINING_SEG_1   0

The start of training segment 1, in symbols

Referenced by v27ter_tx_restart().

#define V27TER_TRAINING_SEG_2   (V27TER_TRAINING_SEG_1 + 320)

The start of training segment 2, in symbols

Referenced by v27ter_tx_restart().

#define V27TER_TRAINING_SEG_3   (V27TER_TRAINING_SEG_2 + 32)

The start of training segment 3, in symbols

#define V27TER_TRAINING_SEG_4   (V27TER_TRAINING_SEG_3 + 50)

The start of training segment 4, in symbols

#define V27TER_TRAINING_SEG_5   (V27TER_TRAINING_SEG_4 + 1074)

The start of training segment 5, in symbols

#define V27TER_TRAINING_SHUTDOWN_END   (V27TER_TRAINING_END + 32)

The end of the shutdown sequence, in symbols

Referenced by SPAN_DECLARE_NONSTD().


Function Documentation

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.

Parameters:
user_data An opaque point which must point to a transmitter context.
Returns:
the next bit, or PUTBIT_END_OF_DATA to indicate the data stream has ended.

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).

Parameters:
s The FAX context.
len The number of samples to fake.
Returns:
The number of samples unprocessed. This should only be non-zero if the software has reached the end of the FAX call.

Apply T.30 transmit processing to generate a block of audio samples.

Parameters:
s The FAX context.
amp The audio sample buffer.
max_len The number of samples to be generated.
Returns:
The number of samples actually generated. This will be zero when there is nothing to send.

Process a block of received FSK modem audio samples.

Parameters:
s The modem context.
amp The audio sample buffer.
len The number of samples in the buffer.
Returns:
The number of samples unprocessed.

Fake processing of a missing block of received FSK modem audio samples (e.g due to packet loss).

Parameters:
s The modem context.
len The number of samples to fake.
Returns:
The number of samples unprocessed.
Parameters:
s A pointer to an HDLC transmitter context.
Returns:
The next byte for transmission.
Parameters:
s A pointer to an HDLC transmitter context.
buf The buffer for the data.
max_len The number of bytes to get.
Returns:
The number of bytes actually got.
Parameters:
s The context.
amp An array of signal samples.
len The number of samples in the array.
Returns:
The number of unprocessed samples.

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.

Parameters:
user_data The context.
amp The signal.buffer
len The length of the signal buffer
Returns:
0.

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.

Parameters:
user_data The context.
len The length of the signal buffer
Returns:
0.

Fake processing of a missing block of received T.31 modem audio samples (e.g due to packet loss).

Parameters:
s The T.31 modem context.
len The number of samples to fake.
Returns:
The number of samples unprocessed.

Generate a block of T.31 modem audio samples.

Parameters:
s The T.31 modem context.
amp The audio sample buffer.
max_len The number of samples to be generated.
Returns:
The number of samples actually generated.

Apply fake processing when a block of audio samples is missing (e.g due to packet loss).

Parameters:
s The T.38 context.
len The number of samples to fake.
Returns:
The number of samples unprocessed. This should only be non-zero if the software has reached the end of the FAX call.

Generate a block of FAX audio samples.

Parameters:
s The T.38 context.
amp The audio sample buffer.
max_len The number of samples to be generated.
Returns:
The number of samples actually generated.

Fake processing of a missing block of received V.17 modem audio samples. (e.g due to packet loss).

Parameters:
s The modem context.
len The number of samples to fake.
Returns:
The number of samples unprocessed.

Process a block of received V.18 audio samples.

Parameters:
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).

Parameters:
s The modem context.
len The number of samples to fake.
Returns:
The number of samples unprocessed.

Generate a block of V.22bis modem audio samples.

Parameters:
s The modem context.
amp The audio sample buffer.
len The number of samples to be generated.
Returns:
The number of samples actually generated.

Fake processing of a missing block of received V.27ter modem audio samples. (e.g due to packet loss).

Parameters:
s The modem context.
len The number of samples to fake.
Returns:
The number of samples unprocessed.

Fake processing of a missing block of received V.29 modem audio samples. (e.g due to packet loss).

Parameters:
s The modem context.
len The number of samples to fake.
Returns:
The number of samples unprocessed.

Process a block of received V.8 audio samples.

Parameters:
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.

Parameters:
s The FAX context.
amp The audio sample buffer.
len The number of samples in the buffer.
Returns:
The number of samples unprocessed. This should only be non-zero if the software has reached the end of the FAX call.

Apply fake T.30 receive processing when a block of audio samples is missing (e.g due to packet loss).

Parameters:
s The FAX context.
len The number of samples to fake.
Returns:
The number of samples unprocessed. This should only be non-zero if the software has reached the end of the FAX call.

Apply T.30 transmit processing to generate a block of audio samples.

Parameters:
s The FAX context.
amp The audio sample buffer.
max_len The number of samples to be generated.
Returns:
The number of samples actually generated. This will be zero when there is nothing to send.

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.

Parameters:
s The modem context.
amp The audio sample buffer.
len The number of samples to be generated.
Returns:
The number of samples actually generated.

Process a block of received FSK modem audio samples.

Parameters:
s The modem context.
amp The audio sample buffer.
len The number of samples in the buffer.
Returns:
The number of samples unprocessed.

Fake processing of a missing block of received FSK modem audio samples (e.g due to packet loss).

Parameters:
s The modem context.
len The number of samples to fake.
Returns:
The number of samples unprocessed.

Get the next bit of a transmitted serial bit stream.

Get the next sequence of bytes for transmission.

Get the next byte for transmission.

Parameters:
s A pointer to an HDLC transmitter context.
Returns:
The next bit for transmission.
Parameters:
s A pointer to an HDLC transmitter context.
Returns:
The next byte for transmission.
Parameters:
s A pointer to an HDLC transmitter context.
buf The buffer for the data.
max_len The number of bytes to get.
Returns:
The number of bytes actually got.

Get the next bit of a transmitted serial bit stream.

Process a block of samples through an instance of the modem connect tones detector.

Parameters:
s The context.
amp An array of signal samples.
len The number of samples to generate.
Returns:
The number of samples generated.
Parameters:
s The context.
amp An array of signal samples.
len The number of samples in the array.
Returns:
The number of unprocessed samples.

Get the next bit of a transmitted serial bit stream.

Dummy receive fillin callback.

Dummy receive callback.

Generate a block of silent audio samples.

Parameters:
s The silence generator context.
amp The audio sample buffer.
max_len The number of samples to be generated.
Returns:
The number of samples actually generated. This will be zero when there is nothing to send.

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.

Parameters:
user_data The context.
amp The signal.buffer
len The length of the signal buffer
Returns:
0.

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.

Parameters:
user_data The context.
len The length of the signal buffer
Returns:
0.

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.

Parameters:
s The T.31 modem context.
amp The audio sample buffer.
len The number of samples in the buffer.
Returns:
The number of samples unprocessed.

Fake processing of a missing block of received T.31 modem audio samples (e.g due to packet loss).

Parameters:
s The T.31 modem context.
len The number of samples to fake.
Returns:
The number of samples unprocessed.

Generate a block of T.31 modem audio samples.

Parameters:
s The T.31 modem context.
amp The audio sample buffer.
max_len The number of samples to be generated.
Returns:
The number of samples actually 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.

Parameters:
s The T.38 context.
amp The audio sample buffer.
len The number of samples in the buffer.
Returns:
The number of samples unprocessed.

Apply fake processing when a block of audio samples is missing (e.g due to packet loss).

Parameters:
s The T.38 context.
len The number of samples to fake.
Returns:
The number of samples unprocessed. This should only be non-zero if the software has reached the end of the FAX call.

Generate a block of FAX audio samples.

Parameters:
s The T.38 context.
amp The audio sample buffer.
max_len The number of samples to be generated.
Returns:
The number of samples actually 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.

Parameters:
s The modem context.
amp The audio sample buffer.
len The number of samples in the buffer.
Returns:
The number of samples unprocessed.

Fake processing of a missing block of received V.17 modem audio samples. (e.g due to packet loss).

Parameters:
s The modem context.
len The number of samples to fake.
Returns:
The number of samples unprocessed.

Get the next bit of a transmitted serial bit stream.

Generate a block of V.17 modem audio samples.

Parameters:
s The modem context.
amp The audio sample buffer.
len The number of samples to be generated.
Returns:
The number of samples actually 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.

Parameters:
s The V.18 context.
amp The audio sample buffer.
max_len The number of samples to be generated.
Returns:
The number of samples actually generated.

Process a block of received V.18 audio samples.

Parameters:
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.

Parameters:
s The modem context.
amp The audio sample buffer.
len The number of samples in the buffer.
Returns:
The number of samples unprocessed.

Fake processing of a missing block of received V.22bis modem audio samples. (e.g due to packet loss).

Parameters:
s The modem context.
len The number of samples to fake.
Returns:
The number of samples unprocessed.

Generate a block of V.22bis modem audio samples.

Parameters:
s The modem context.
amp The audio sample buffer.
len The number of samples to be generated.
Returns:
The number of samples actually 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.

Parameters:
s The modem context.
amp The audio sample buffer.
len The number of samples in the buffer.
Returns:
The number of samples unprocessed.

Fake processing of a missing block of received V.27ter modem audio samples. (e.g due to packet loss).

Parameters:
s The modem context.
len The number of samples to fake.
Returns:
The number of samples unprocessed.

Get the next bit of a transmitted serial bit stream.

Generate a block of V.27ter modem audio samples.

Parameters:
s The modem context.
amp The audio sample buffer.
len The number of samples to be generated.
Returns:
The number of samples actually 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.

Parameters:
s The modem context.
amp The audio sample buffer.
len The number of samples in the buffer.
Returns:
The number of samples unprocessed.

Fake processing of a missing block of received V.29 modem audio samples. (e.g due to packet loss).

Parameters:
s The modem context.
len The number of samples to fake.
Returns:
The number of samples unprocessed.

Get the next bit of a transmitted serial bit stream.

Generate a block of V.29 modem audio samples.

Parameters:
s The modem context.
amp The audio sample buffer.
len The number of samples to be generated.
Returns:
The number of samples actually 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.

Parameters:
s The V.8 context.
amp The audio sample buffer.
max_len The number of samples to be generated.
Returns:
The number of samples actually generated.

Process a block of received V.8 audio samples.

Parameters:
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 V27TER_TRAINING_SHUTDOWN_END.

int v27ter_tx_free ( v27ter_tx_state_t s  ) 

Free a V.27ter modem transmit context.

Free a V.27ter modem transmit context.

Parameters:
s The modem context.
Returns:
0 for OK
logging_state_t* v27ter_tx_get_logging_state ( v27ter_tx_state_t s  ) 

Get the logging context associated with a V.27ter modem transmit context.

Get the logging context associated with a V.27ter modem transmit context.

Parameters:
s The modem context.
Returns:
A pointer to the logging context
v27ter_tx_state_t* v27ter_tx_init ( v27ter_tx_state_t s,
int  bit_rate,
int  tep,
get_bit_func_t  get_bit,
void *  user_data 
)

Initialise a V.27ter modem transmit context.

Initialise a V.27ter modem transmit context.

Parameters:
s The modem context.
bit_rate The bit rate of the modem. Valid values are 2400 and 4800.
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.
Returns:
A pointer to the modem context, or NULL if there was a problem.

References CARRIER_NOMINAL_FREQ, dds_phase_ratef(), v27ter_tx_power(), and v27ter_tx_restart().

void v27ter_tx_power ( v27ter_tx_state_t s,
float  power 
)

Adjust a V.27ter modem transmit context's output power.

Adjust a V.27ter modem transmit context's power output.

Parameters:
s The modem context.
power The power level, in dBm0

Referenced by v27ter_tx_init().

int v27ter_tx_release ( v27ter_tx_state_t s  ) 

Release a V.27ter modem transmit context.

Release a V.27ter modem transmit context.

Parameters:
s The modem context.
Returns:
0 for OK
int v27ter_tx_restart ( v27ter_tx_state_t s,
int  bit_rate,
int  tep 
)

Reinitialise an existing V.27ter modem transmit context.

Reinitialise an existing V.27ter modem transmit context, so it may be reused.

Parameters:
s The modem context.
bit_rate The bit rate of the modem. Valid values are 2400 and 4800.
tep TRUE is the optional TEP tone is to be transmitted.
Returns:
0 for OK, -1 for bad parameter

References V27TER_TRAINING_SEG_1, and V27TER_TRAINING_SEG_2.

Referenced by v27ter_tx_init().

void v27ter_tx_set_get_bit ( v27ter_tx_state_t s,
get_bit_func_t  get_bit,
void *  user_data 
)

Change the get_bit function associated with a V.27ter modem transmit context.

Change the get_bit function associated with a V.27ter modem transmit context.

Parameters:
s The modem context.
get_bit The callback routine used to get the data to be transmitted.
user_data An opaque pointer.
void v27ter_tx_set_modem_status_handler ( v27ter_tx_state_t s,
modem_tx_status_func_t  handler,
void *  user_data 
)

Change the modem status report function associated with a V.27ter modem transmit context.

Change the modem status report function associated with a V.27ter modem transmit context.

Parameters:
s The modem context.
handler The callback routine used to report modem status changes.
user_data An opaque pointer.

Generated on 18 Oct 2012 for spandsp by  doxygen 1.6.1