spandsp  0.0.6
async.c File Reference
#include <inttypes.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include "spandsp/telephony.h"
#include "spandsp/async.h"
#include "spandsp/private/async.h"

Functions

const char * signal_status_to_str (int status)
 Convert a signal status to a short text description. More...
 
async_rx_state_tasync_rx_init (async_rx_state_t *s, int data_bits, int parity, int stop_bits, int use_v14, put_byte_func_t put_byte, void *user_data)
 Initialise an asynchronous data receiver context. More...
 
int async_rx_release (async_rx_state_t *s)
 
int async_rx_free (async_rx_state_t *s)
 
void async_rx_put_bit (void *user_data, int bit)
 
async_tx_state_tasync_tx_init (async_tx_state_t *s, int data_bits, int parity, int stop_bits, int use_v14, get_byte_func_t get_byte, void *user_data)
 Initialise an asynchronous data transmit context. More...
 
int async_tx_release (async_tx_state_t *s)
 
int async_tx_free (async_tx_state_t *s)
 
int async_tx_get_bit (void *user_data)
 

Function Documentation

async_rx_state_t* async_rx_init ( async_rx_state_t s,
int  data_bits,
int  parity_bits,
int  stop_bits,
int  use_v14,
put_byte_func_t  put_byte,
void *  user_data 
)

Initialise an asynchronous data receiver context.

Initialise an asynchronous data receiver context.

Parameters
sThe receiver context.
data_bitsThe number of data bits.
parity_bitsThe type of parity.
stop_bitsThe number of stop bits.
use_v14TRUE if V.14 rate adaption processing should be used.
put_byteThe callback routine used to put the received data.
user_dataAn opaque pointer.
Returns
A pointer to the initialised context, or NULL if there was a problem.

References ASYNC_PARITY_ODD, async_rx_state_s::bitpos, async_rx_state_s::byte_in_progress, async_rx_state_s::data_bits, async_rx_state_s::framing_errors, async_rx_state_s::parity, async_rx_state_s::parity_bit, async_rx_state_s::parity_errors, async_rx_state_s::put_byte, SIG_STATUS_CARRIER_DOWN, SIG_STATUS_CARRIER_UP, SIG_STATUS_END_OF_DATA, SIG_STATUS_TRAINING_FAILED, SIG_STATUS_TRAINING_IN_PROGRESS, SIG_STATUS_TRAINING_SUCCEEDED, SPAN_DECLARE_NONSTD(), async_rx_state_s::use_v14, and async_rx_state_s::user_data.

async_tx_state_t* async_tx_init ( async_tx_state_t s,
int  data_bits,
int  parity_bits,
int  stop_bits,
int  use_v14,
get_byte_func_t  get_byte,
void *  user_data 
)

Initialise an asynchronous data transmit context.

Initialise an asynchronous data transmit context.

Parameters
sThe transmitter context.
data_bitsThe number of data bit.
parity_bitsThe type of parity.
stop_bitsThe number of stop bits.
use_v14TRUE if V.14 rate adaption processing should be used.
get_byteThe callback routine used to get the data to be transmitted.
user_dataAn opaque pointer.
Returns
A pointer to the initialised context, or NULL if there was a problem.

References ASYNC_PARITY_NONE, ASYNC_PARITY_ODD, async_tx_state_s::bitpos, async_tx_state_s::byte_in_progress, async_tx_state_s::data_bits, async_tx_state_s::get_byte, async_tx_state_s::parity, async_tx_state_s::parity_bit, SIG_STATUS_END_OF_DATA, SPAN_DECLARE_NONSTD(), async_tx_state_s::stop_bits, and async_tx_state_s::user_data.

Referenced by v18_init().

const char* signal_status_to_str ( int  status)

Convert a signal status to a short text description.

Convert a signal status to a short text description.

Parameters
statusThe modem signal status.
Returns
A pointer to the description.

References SIG_STATUS_ABORT, SIG_STATUS_BREAK, SIG_STATUS_CARRIER_DOWN, SIG_STATUS_CARRIER_UP, SIG_STATUS_END_OF_DATA, SIG_STATUS_FRAMING_OK, SIG_STATUS_MODEM_RETRAIN_OCCURRED, SIG_STATUS_OCTET_REPORT, SIG_STATUS_POOR_SIGNAL_QUALITY, SIG_STATUS_SHUTDOWN_COMPLETE, SIG_STATUS_TRAINING_FAILED, SIG_STATUS_TRAINING_IN_PROGRESS, and SIG_STATUS_TRAINING_SUCCEEDED.

Referenced by lapm_dump(), t30_non_ecm_get_chunk(), and v18_decode_dtmf().