#include <inttypes.h>
#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>
#include <string.h>
#include <tgmath.h>
#include <math.h>
#include "floating_fudge.h"
#include <assert.h>
#include <limits.h>
#include "spandsp/telephony.h"
#include "spandsp/logging.h"
#include "spandsp/async.h"
#include "spandsp/silence_gen.h"
#include "spandsp/private/silence_gen.h"
Functions | |
SPAN_DECLARE_NONSTD (int) | |
Get the next bit of a transmitted serial bit stream. | |
void | silence_gen_always (silence_gen_state_t *s) |
Set a silence generator context to output continuous silence. | |
void | silence_gen_set (silence_gen_state_t *s, int silent_samples) |
Set a silence generator context to output a specified period of silence. | |
void | silence_gen_alter (silence_gen_state_t *s, int silent_samples) |
Alter the period of a silence generator context by a specified amount. | |
int | silence_gen_remainder (silence_gen_state_t *s) |
Find how long a silence generator context has to run. | |
int | silence_gen_generated (silence_gen_state_t *s) |
Find the total silence generated to date. | |
void | silence_gen_status_handler (silence_gen_state_t *s, modem_tx_status_func_t handler, void *user_data) |
Change the status reporting function associated with a silence generator context. | |
silence_gen_state_t * | silence_gen_init (silence_gen_state_t *s, int silent_samples) |
Initialise a timed silence generator context. | |
int | silence_gen_release (silence_gen_state_t *s) |
int | silence_gen_free (silence_gen_state_t *s) |
int | span_dummy_mod (void *user_data, int16_t amp[], int len) |
Dummy signal modifier callback. |
void silence_gen_alter | ( | silence_gen_state_t * | s, | |
int | silent_samples | |||
) |
Alter the period of a silence generator context by a specified amount.
Alter the period of a silence generator context by a specified amount.
s | The silence generator context. | |
silent_samples | The number of samples to change the setting by. A positive number increases the duration. A negative number reduces it. The duration is prevented from going negative. |
void silence_gen_always | ( | silence_gen_state_t * | s | ) |
Set a silence generator context to output continuous silence.
Set a silence generator context to output continuous silence.
s | The silence generator context. |
int silence_gen_generated | ( | silence_gen_state_t * | s | ) |
Find the total silence generated to date.
Find the total silence generated to date by a silence generator context.
s | The silence generator context. |
silence_gen_state_t* silence_gen_init | ( | silence_gen_state_t * | s, | |
int | silent_samples | |||
) |
Initialise a timed silence generator context.
Initialise a timed silence generator context.
s | The silence generator context. | |
silent_samples | The initial number of samples to set the silence to. |
int silence_gen_remainder | ( | silence_gen_state_t * | s | ) |
Find how long a silence generator context has to run.
Find how long a silence generator context has to run.
s | The silence generator context. |
void silence_gen_set | ( | silence_gen_state_t * | s, | |
int | silent_samples | |||
) |
Set a silence generator context to output a specified period of silence.
Set a silence generator context to output a specified period of silence.
s | The silence generator context. | |
silent_samples | The number of samples to be generated. |
Referenced by SPAN_DECLARE_NONSTD().
void silence_gen_status_handler | ( | silence_gen_state_t * | s, | |
modem_tx_status_func_t | handler, | |||
void * | user_data | |||
) |
Change the status reporting function associated with a silence generator context.
Change the status reporting function associated with a silence generator context.
s | The silence generator context. | |
handler | The callback routine used to report status changes. | |
user_data | An opaque pointer. |
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. |
int span_dummy_mod | ( | void * | user_data, | |
int16_t | amp[], | |||
int | len | |||
) |
Dummy signal modifier callback.
A dummy routine to use as a signal modifier callback, when we aren't really trying to process the signal. It just returns without affecting anything.
user_data | The context. | |
amp | The signal.buffer | |
len | The length of the signal buffer |