26 #if !defined(_SPANDSP_PRIVATE_T31_H_) 27 #define _SPANDSP_PRIVATE_T31_H_ 29 #define T31_TX_BUF_LEN (4096) 30 #define T31_TX_BUF_HIGH_TIDE (4096 - 1024) 31 #define T31_TX_BUF_LOW_TIDE (1024) 33 #define T31_MAX_HDLC_LEN 284 35 #define T31_T38_MAX_HDLC_LEN 260 37 #define T31_TX_HDLC_BUFS 256 45 uint8_t buf[T31_MAX_HDLC_LEN];
74 void *next_tx_user_data;
127 uint8_t buf[T31_T38_MAX_HDLC_LEN];
177 t31_modem_control_handler_t modem_control_handler;
178 void *modem_control_user_data;
189 uint8_t
buf[T31_MAX_HDLC_LEN];
199 uint8_t
buf[T31_TX_BUF_LEN];
225 int64_t dte_data_timeout;
Definition: private/queue.h:33
struct t31_state_s::@63 hdlc_tx
int32_t timeout_rx_samples
The current receive timeout.
Definition: private/t31.h:167
int16_t len
HDLC message lengths.
Definition: private/t31.h:47
int extra_bits
The number of extra bits in a fully stuffed version of the contents of the HDLC transmit buffer...
Definition: private/t31.h:136
int in_bytes
The number of bytes stored in the transmit buffer.
Definition: private/t31.h:201
Definition: private/power_meter.h:33
int silence_awaited
Samples of silence awaited, as specified in a "wait for silence" command.
Definition: private/t31.h:216
int tx_bit_rate
Current transmission bit rate.
Definition: private/t31.h:159
t38_core_state_t t38
Core T.38 IFP support.
Definition: private/t31.h:106
int32_t next_tx_samples
The value for samples at the next transmission point.
Definition: private/t31.h:163
hdlc_rx_state_t hdlc_rx_non_ecm
An HDLC context used when receiving HDLC messages from the terminal port. as if it were non-ECM data ...
Definition: private/t31.h:123
int out_bytes
The number of bytes sent from the transmit buffer.
Definition: private/t31.h:203
int modem
The currently queued modem type.
Definition: private/t31.h:228
bool rx_data_missing
True is there has been some T.38 data missed.
Definition: private/t31.h:112
bool holding
True if holding up further data into the buffer, for flow control.
Definition: private/t31.h:207
Definition: private/hdlc.h:91
int octets_per_data_packet
The number of octets to send in each image packet (non-ECM or ECM) at the current rate and the curren...
Definition: private/t31.h:116
int current_byte
The current data byte in progress.
Definition: private/t31.h:79
int32_t samples
A "sample" count, used to time events.
Definition: private/t31.h:161
int current_tx_data_type
The current T.38 data type being transmitted.
Definition: private/t31.h:151
Definition: private/t31.h:67
span_tx_handler_t next_tx_handler
Definition: private/t31.h:73
bool data_started
True if the flow of real data has started.
Definition: private/t31.h:205
bool short_train
True when short training mode has been selected by the computer.
Definition: private/t31.h:230
int current_rx_type
The current operating mode of the receiver.
Definition: private/t31.h:154
int bit_rate
The current bit rate for the FAX fast message transfer modem.
Definition: private/t31.h:219
int64_t call_samples
Samples elapsed in the current call.
Definition: private/t31.h:224
power_meter_t rx_power
Rx power meter, used to detect silence.
Definition: private/t31.h:82
Definition: private/t31.h:42
int timed_step
The current transmit step being timed.
Definition: private/t31.h:109
int current_tx_type
The current operating mode of the transmitter.
Definition: private/t31.h:156
uint8_t buf[284]
The HDLC transmit buffer.
Definition: private/t31.h:189
int iaf
Internet Aware FAX mode bit mask.
Definition: private/t31.h:99
int non_ecm_trailer_bytes
Counter for trailing non-ECM bytes, used to flush out the far end's modem.
Definition: private/t31.h:146
bool rx_frame_received
True if a valid HDLC frame has been received in the current reception period.
Definition: private/t31.h:221
Definition: private/fax_modems.h:34
hdlc_tx_state_t hdlc_tx_non_ecm
An HDLC context used when sending HDLC messages to the terminal port as if it were non-ECM data (ECM ...
Definition: private/t31.h:120
int chunking_modes
Bit fields controlling the way data is packed into chunked for transmission.
Definition: private/t31.h:103
bool dled
Definition: private/t31.h:213
logging_state_t logging
Error and flow logging control.
Definition: private/t31.h:234
Definition: private/t31.h:53
struct t31_state_s::@64 non_ecm_tx
int16_t last_sample
Last sample, used for an elementary HPF for the power meter.
Definition: private/t31.h:84
int out
HDLC buffer number for output.
Definition: private/t31.h:60
int silence_heard
Samples of silence heard.
Definition: private/t31.h:89
Definition: private/logging.h:33
bool t38_mode
Definition: private/t31.h:183
int in
HDLC buffer number for input.
Definition: private/t31.h:58
int us_per_tx_chunk
Required time between T.38 transmissions, in us.
Definition: private/t31.h:101
int bit_no
No of data bits in current_byte.
Definition: private/t31.h:77
int32_t timeout_tx_samples
The current transmit timeout.
Definition: private/t31.h:165
Definition: private/hdlc.h:32
Definition: private/t38_core.h:32
int32_t silence_threshold_power
The current silence threshold.
Definition: private/t31.h:86
int next_tx_indicator
The next queued tramsit indicator.
Definition: private/t31.h:149
Definition: private/t31.h:174
int ecm_mode
True if we are using ECM mode. This is used to select HDLC faking, which is necessary with clunky cla...
Definition: private/t31.h:143
Definition: private/t31.h:96
Definition: private/at_interpreter.h:44
Definition: private/v8.h:29