#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/v29rx.h"
#include "spandsp/v22bis.h"
#include "spandsp/private/logging.h"
#include "spandsp/private/v22bis.h"
#include "v22bis_tx_floating_rrc.h"
Defines | |
#define | ms_to_symbols(t) (((t)*600)/1000) |
Functions | |
SPAN_DECLARE_NONSTD (int) | |
Get the next bit of a transmitted serial bit stream. | |
void | v22bis_tx_power (v22bis_state_t *s, float power) |
Adjust a V.22bis modem transmit context's output power. | |
void | v22bis_set_get_bit (v22bis_state_t *s, get_bit_func_t get_bit, void *user_data) |
Change the get_bit function associated with a V.22bis modem context. | |
void | v22bis_set_put_bit (v22bis_state_t *s, put_bit_func_t put_bit, void *user_data) |
Change the put_bit function associated with a V.22bis modem context. | |
void | v22bis_set_modem_status_handler (v22bis_state_t *s, modem_tx_status_func_t handler, void *user_data) |
Change the modem status report function associated with a V.22bis modem receive context. | |
logging_state_t * | v22bis_get_logging_state (v22bis_state_t *s) |
Get the logging context associated with a V.22bis modem context. | |
int | v22bis_restart (v22bis_state_t *s, int bit_rate) |
Reinitialise an existing V.22bis modem context. | |
int | v22bis_request_retrain (v22bis_state_t *s, int bit_rate) |
Request a retrain for a V.22bis modem context. | |
int | v22bis_remote_loopback (v22bis_state_t *s, int enable) |
Request a loopback 2 for a V.22bis modem context. | |
int | v22bis_get_current_bit_rate (v22bis_state_t *s) |
Report the current operating bit rate of a V.22bis modem context. | |
v22bis_state_t * | v22bis_init (v22bis_state_t *s, int bit_rate, int guard, int calling_party, get_bit_func_t get_bit, void *get_bit_user_data, put_bit_func_t put_bit, void *put_bit_user_data) |
Initialise a V.22bis modem context. | |
int | v22bis_release (v22bis_state_t *s) |
Release a V.22bis modem receive context. | |
int | v22bis_free (v22bis_state_t *s) |
Free a V.22bis modem receive context. | |
Variables | |
const complexf_t | v22bis_constellation [16] |
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_modf(), complexf_t::im, and complexf_t::re.
int v22bis_free | ( | v22bis_state_t * | s | ) |
Free a V.22bis modem receive context.
Free a V.22bis modem receive context.
s | The modem context. |
int v22bis_get_current_bit_rate | ( | v22bis_state_t * | s | ) |
Report the current operating bit rate of a V.22bis modem context.
Report the current operating bit rate of a V.22bis modem context.
s | The modem context. |
logging_state_t* v22bis_get_logging_state | ( | v22bis_state_t * | s | ) |
Get the logging context associated with a V.22bis modem context.
Get the logging context associated with a V.22bis modem context.
s | The modem context. |
v22bis_state_t* v22bis_init | ( | v22bis_state_t * | s, | |
int | bit_rate, | |||
int | guard, | |||
int | calling_party, | |||
get_bit_func_t | get_bit, | |||
void * | get_bit_user_data, | |||
put_bit_func_t | put_bit, | |||
void * | put_bit_user_data | |||
) |
Initialise a V.22bis modem context.
Initialise a V.22bis modem 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 1200 and 2400. | |
guard | The guard tone option. 0 = none, 1 = 550Hz, 2 = 1800Hz. | |
calling_party | TRUE if this is the calling modem. | |
get_bit | The callback routine used to get the data to be transmitted. | |
put_bit | The callback routine used to get the data to be transmitted. | |
user_data | An opaque pointer, passed in calls to the get and put routines. |
References dds_phase_ratef(), v22bis_restart(), and v22bis_tx_power().
int v22bis_release | ( | v22bis_state_t * | s | ) |
Release a V.22bis modem receive context.
Release a V.22bis modem receive context.
s | The modem context. |
int v22bis_remote_loopback | ( | v22bis_state_t * | s, | |
int | enable | |||
) |
Request a loopback 2 for a V.22bis modem context.
Request a loopback 2 for a V.22bis modem context.
s | The modem context. | |
enable | TRUE to enable loopback, or FALSE to disable it. |
int v22bis_request_retrain | ( | v22bis_state_t * | s, | |
int | bit_rate | |||
) |
Request a retrain for a V.22bis modem context.
Request a retrain for a V.22bis modem context. A rate change may also be requested.
s | The modem context. | |
bit_rate | The bit rate of the modem. Valid values are 1200 and 2400. |
References SIG_STATUS_MODEM_RETRAIN_OCCURRED, and span_log().
int v22bis_restart | ( | v22bis_state_t * | s, | |
int | bit_rate | |||
) |
Reinitialise an existing V.22bis modem context.
Reinitialise an existing V.22bis modem context, so it may be reused.
s | The modem context. | |
bit_rate | The bit rate of the modem. Valid values are 1200 and 2400. |
References v22bis_rx_restart().
Referenced by v22bis_init().
void v22bis_set_get_bit | ( | v22bis_state_t * | s, | |
get_bit_func_t | get_bit, | |||
void * | user_data | |||
) |
Change the get_bit function associated with a V.22bis modem context.
Change the get_bit function associated with a V.22bis modem context.
s | The modem context. | |
get_bit | The callback routine used to get the data to be transmitted. | |
user_data | An opaque pointer. |
void v22bis_set_modem_status_handler | ( | v22bis_state_t * | s, | |
modem_rx_status_func_t | handler, | |||
void * | user_data | |||
) |
Change the modem status report function associated with a V.22bis modem receive context.
Change the modem status report function associated with a V.22bis modem receive context.
s | The modem context. | |
handler | The callback routine used to report modem status changes. | |
user_data | An opaque pointer. |
void v22bis_set_put_bit | ( | v22bis_state_t * | s, | |
put_bit_func_t | put_bit, | |||
void * | user_data | |||
) |
Change the put_bit function associated with a V.22bis modem context.
Change the get_bit function associated with a V.22bis modem context.
s | The modem context. | |
put_bit | The callback routine used to process the data received. | |
user_data | An opaque pointer. |
void v22bis_tx_power | ( | v22bis_state_t * | s, | |
float | power | |||
) |
Adjust a V.22bis modem transmit context's output power.
Adjust a V.22bis modem transmit context's power output.
s | The modem context. | |
power | The power level, in dBm0 |
References dds_phase_ratef().
Referenced by v22bis_init().
const complexf_t v22bis_constellation[16] |
{ { 1.0f, 1.0f}, { 3.0f, 1.0f}, { 1.0f, 3.0f}, { 3.0f, 3.0f}, {-1.0f, 1.0f}, {-1.0f, 3.0f}, {-3.0f, 1.0f}, {-3.0f, 3.0f}, {-1.0f, -1.0f}, {-3.0f, -1.0f}, {-1.0f, -3.0f}, {-3.0f, -3.0f}, { 1.0f, -1.0f}, { 1.0f, -3.0f}, { 3.0f, -1.0f}, { 3.0f, -3.0f} }