spandsp 0.0.6
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Go to the source code of this file.
Macros | |
#define | modem_rx_status_func_t modem_status_func_t |
#define | modem_tx_status_func_t modem_status_func_t |
Typedefs | |
typedef void(* | put_msg_func_t) (void *user_data, const uint8_t *msg, int len) |
typedef int(* | get_msg_func_t) (void *user_data, uint8_t *msg, int max_len) |
typedef void(* | put_byte_func_t) (void *user_data, int byte) |
typedef int(* | get_byte_func_t) (void *user_data) |
typedef void(* | put_bit_func_t) (void *user_data, int bit) |
typedef int(* | get_bit_func_t) (void *user_data) |
typedef void(* | modem_status_func_t) (void *user_data, int status) |
typedef struct async_tx_state_s | async_tx_state_t |
typedef struct async_rx_state_s | async_rx_state_t |
Enumerations | |
enum | { SIG_STATUS_CARRIER_DOWN = -1 , SIG_STATUS_CARRIER_UP = -2 , SIG_STATUS_TRAINING_IN_PROGRESS = -3 , SIG_STATUS_TRAINING_SUCCEEDED = -4 , SIG_STATUS_TRAINING_FAILED = -5 , SIG_STATUS_FRAMING_OK = -6 , SIG_STATUS_END_OF_DATA = -7 , SIG_STATUS_ABORT = -8 , SIG_STATUS_BREAK = -9 , SIG_STATUS_SHUTDOWN_COMPLETE = -10 , SIG_STATUS_OCTET_REPORT = -11 , SIG_STATUS_POOR_SIGNAL_QUALITY = -12 , SIG_STATUS_MODEM_RETRAIN_OCCURRED = -13 , SIG_STATUS_LINK_CONNECTED = -14 , SIG_STATUS_LINK_DISCONNECTED = -15 , SIG_STATUS_LINK_ERROR = -16 } |
enum | { ASYNC_PARITY_NONE = 0 , ASYNC_PARITY_EVEN , ASYNC_PARITY_ODD } |
Functions | |
const char * | signal_status_to_str (int status) |
Convert a signal status to a short text description. More... | |
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. More... | |
int | async_tx_release (async_tx_state_t *s) |
int | async_tx_free (async_tx_state_t *s) |
SPAN_DECLARE_NONSTD (int) async_tx_get_bit(void *user_data) | |
Get the next bit of a transmitted serial bit stream. More... | |
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. More... | |
int | async_rx_release (async_rx_state_t *s) |
int | async_rx_free (async_rx_state_t *s) |
SPAN_DECLARE_NONSTD (void) async_rx_put_bit(void *user_data | |
Accept a bit from a received serial bit stream. More... | |
Variables | |
int | bit |
typedef struct async_rx_state_s async_rx_state_t |
Asynchronous data receive descriptor. This defines the state of a single working instance of an asynchronous serial to byte converter, for use in FSK modems.
typedef struct async_tx_state_s async_tx_state_t |
Asynchronous data transmit descriptor. This defines the state of a single working instance of a byte to asynchronous serial converter, for use in FSK modems.
typedef int(* get_bit_func_t) (void *user_data) |
Bit get function for data pumps
typedef int(* get_byte_func_t) (void *user_data) |
Byte get function for data pumps
typedef int(* get_msg_func_t) (void *user_data, uint8_t *msg, int max_len) |
Message get function for data pumps
typedef void(* modem_status_func_t) (void *user_data, int status) |
Status change callback function for data pumps
typedef void(* put_bit_func_t) (void *user_data, int bit) |
Bit put function for data pumps
typedef void(* put_byte_func_t) (void *user_data, int byte) |
Byte put function for data pumps
typedef void(* put_msg_func_t) (void *user_data, const uint8_t *msg, int len) |
Message put function for data pumps
anonymous enum |
Special "bit" values for the bitstream put and get functions, and the signal status functions.
anonymous enum |
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.
s | The receiver context. |
data_bits | The number of data bits. |
parity_bits | The type of parity. |
stop_bits | The number of stop bits. |
use_v14 | TRUE if V.14 rate adaption processing should be used. |
put_byte | The callback routine used to put the received data. |
user_data | An opaque pointer. |
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.
s | The transmitter context. |
data_bits | The number of data bit. |
parity_bits | The type of parity. |
stop_bits | The number of stop bits. |
use_v14 | TRUE if V.14 rate adaption processing should be used. |
get_byte | The callback routine used to get the data to be transmitted. |
user_data | An opaque pointer. |
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.
status | The modem signal status. |
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_LINK_CONNECTED, SIG_STATUS_LINK_DISCONNECTED, SIG_STATUS_LINK_ERROR, 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.
SPAN_DECLARE_NONSTD | ( | int | ) |
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.
Process a received T.38 IFP packet from a reliable stream (e.g. TCP).
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.
Get the next bit of a transmitted serial bit stream.
user_data | An opaque point which must point to a transmitter context. |
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. |
s | The T.38 context. |
buf | The packet contents. |
len | The length of the packet contents. |
seq_no | The packet sequence number, used for logging purposes. |
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.
Process a received T.38 IFP packet from a reliable stream (e.g. TCP).
s | The T.38 context. |
buf | The packet contents. |
len | The length of the packet contents. |
seq_no | The packet sequence number. |
s | The T.38 context. |
buf | The packet contents. |
len | The length of the packet contents. |
seq_no | The packet sequence number, used for logging purposes. |
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. |
SPAN_DECLARE_NONSTD | ( | void | ) |
Accept a bit from a received serial bit stream.
Process a received HDLC frame.
Put a series of bytes of data to an HDLC receiver.
Put a byte of data to an HDLC receiver.
Accept a bit from a received serial bit stream
user_data | An opaque point which must point to a receiver context. |
bit | The new bit. Some special values are supported for this field.
|
s | A pointer to an HDLC receiver context. |
new_byte | The byte of data. |
s | A pointer to an HDLC receiver context. |
buf | The buffer of data. |
len | The length of the data in the buffer. |
Process a received HDLC frame.
user_data | The T.30 context. |
msg | The HDLC message. |
len | The length of the message, in octets. |
ok | TRUE if the frame was received without error. |