spandsp 0.0.6
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Macros | |
#define | T31_TX_BUF_LEN (4096) |
#define | T31_TX_BUF_HIGH_TIDE (4096 - 1024) |
#define | T31_TX_BUF_LOW_TIDE (1024) |
#define | T31_MAX_HDLC_LEN 284 |
#define | T31_T38_MAX_HDLC_LEN 260 |
Typedefs | |
typedef struct t31_state_s | t31_state_t |
typedef int | t31_modem_control_handler_t(t31_state_t *s, void *user_data, int op, const char *num) |
Functions | |
void | t31_call_event (t31_state_t *s, int event) |
int | t31_at_rx (t31_state_t *s, const char *t, int len) |
SPAN_DECLARE_NONSTD (int) t31_rx(t31_state_t *s | |
Process a block of received T.31 modem audio samples. | |
int | t31_t38_send_timeout (t31_state_t *s, int samples) |
void | t31_set_transmit_on_idle (t31_state_t *s, int transmit_on_idle) |
Select whether silent audio will be sent when transmit is idle. | |
void | t31_set_tep_mode (t31_state_t *s, int use_tep) |
Select whether TEP mode will be used. | |
void | t31_set_t38_config (t31_state_t *s, int without_pacing) |
Select whether T.38 data will be paced. | |
void | t31_set_mode (t31_state_t *s, int t38_mode) |
logging_state_t * | t31_get_logging_state (t31_state_t *s) |
Get a pointer to the logging context associated with a T.31 context. | |
t38_core_state_t * | t31_get_t38_core_state (t31_state_t *s) |
t31_state_t * | t31_init (t31_state_t *s, at_tx_handler_t *at_tx_handler, void *at_tx_user_data, t31_modem_control_handler_t *modem_control_handler, void *modem_control_user_data, t38_tx_packet_handler_t *tx_t38_packet_handler, void *tx_t38_packet_user_data) |
Initialise a T.31 context. | |
int | t31_release (t31_state_t *s) |
Release a T.31 context. | |
int | t31_free (t31_state_t *s) |
Release a T.31 context. |
Variables | |
int16_t | amp [] |
int16_t int | len |
int16_t int | max_len |
typedef struct t31_state_s t31_state_t |
T.31 descriptor. This defines the working state for a single instance of a T.31 FAX modem.
SPAN_DECLARE_NONSTD | ( | int | ) |
Process a block of received T.31 modem audio samples.
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.
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. |
int t31_free | ( | t31_state_t * | s | ) |
Release a T.31 context.
Free a T.31 context.
s | The T.31 context. |
References t31_release().
logging_state_t * t31_get_logging_state | ( | t31_state_t * | s | ) |
Get a pointer to the logging context associated with a T.31 context.
Get a pointer to the logging context associated with a T.31 context.
s | The T.31 context. |
References t31_state_s::logging.
t31_state_t * t31_init | ( | t31_state_t * | s, |
at_tx_handler_t * | at_tx_handler, | ||
void * | at_tx_user_data, | ||
t31_modem_control_handler_t * | modem_control_handler, | ||
void * | modem_control_user_data, | ||
t38_tx_packet_handler_t * | tx_t38_packet_handler, | ||
void * | tx_t38_packet_user_data ) |
Initialise a T.31 context.
Initialise a T.31 context. This must be called before the first use of the context, to initialise its contents.
s | The T.31 context. |
at_tx_handler | A callback routine to handle AT interpreter channel output. |
at_tx_user_data | An opaque pointer passed in called to at_tx_handler. |
modem_control_handler | A callback routine to handle control of the modem (off-hook, etc). |
modem_control_user_data | An opaque pointer passed in called to modem_control_handler. |
tx_t38_packet_handler | ??? |
tx_t38_packet_user_data | ??? |
References at_init(), t31_state_s::call_samples, DEFAULT_DTE_TIMEOUT, at_state_s::dte_inactivity_timeout, t31_audio_front_end_state_t::last_sample, t31_state_s::logging, t31_state_s::modem, MODEM_CONNECT_TONES_ANSAM_PR, power_meter_init(), power_meter_level_dbm0(), queue_init(), QUEUE_READ_ATOMIC, QUEUE_WRITE_ATOMIC, t31_audio_front_end_state_t::rx_power, at_state_s::rx_signal_present, at_state_s::rx_trained, t31_state_s::silence_awaited, t31_audio_front_end_state_t::silence_heard, t31_audio_front_end_state_t::silence_threshold_power, t31_set_t38_config(), t31_state_s::t38_mode, and v8_init().
int t31_release | ( | t31_state_t * | s | ) |
Release a T.31 context.
Release a T.31 context.
s | The T.31 context. |
Referenced by t31_free().
void t31_set_t38_config | ( | t31_state_t * | s, |
int | without_pacing ) |
Select whether T.38 data will be paced.
Select whether T.38 data will be paced as it is transmitted.
s | The T.31 modem context. |
without_pacing | TRUE if data is to be sent as fast as possible. FALSE if it is to be paced. |
References DATA_END_TX_COUNT, DATA_TX_COUNT, INDICATOR_TX_COUNT, MS_PER_TX_CHUNK, t31_t38_front_end_state_t::ms_per_tx_chunk, t31_t38_front_end_state_t::t38, T38_PACKET_CATEGORY_CONTROL_DATA, T38_PACKET_CATEGORY_CONTROL_DATA_END, T38_PACKET_CATEGORY_IMAGE_DATA, T38_PACKET_CATEGORY_IMAGE_DATA_END, T38_PACKET_CATEGORY_INDICATOR, and t38_set_redundancy_control().
Referenced by t31_init().
void t31_set_tep_mode | ( | t31_state_t * | s, |
int | use_tep ) |
Select whether TEP mode will be used.
Select whether TEP mode will be used (or time allowed for it (when transmitting).
s | The T.31 modem context. |
use_tep | TRUE if TEP is to be ised. |
References fax_modems_state_s::use_tep.
void t31_set_transmit_on_idle | ( | t31_state_t * | s, |
int | transmit_on_idle ) |
Select whether silent audio will be sent when transmit is idle.
Select whether silent audio will be sent when transmit is idle.
s | The T.31 modem context. |
transmit_on_idle | TRUE if silent audio should be output when the transmitter is idle. FALSE to transmit zero length audio when the transmitter is idle. The default behaviour is FALSE. |
References fax_modems_state_s::transmit_on_idle.