libspandsp 0.0.4

t30.h File Reference

Go to the source code of this file.

Classes

struct  t30_exchanged_info_t
struct  t30_state_s
struct  t30_stats_t

Defines

#define T30_MAX_DIS_DTC_DCS_LEN   22
#define T30_MAX_IDENT_LEN   20
#define T30_MAX_PAGE_HEADER_INFO   50

Typedefs

typedef struct t30_state_s t30_state_t
typedef int( t30_phase_b_handler_t )(t30_state_t *s, void *user_data, int result)
 T.30 phase B callback handler.
typedef int( t30_phase_d_handler_t )(t30_state_t *s, void *user_data, int result)
 T.30 phase D callback handler.
typedef void( t30_phase_e_handler_t )(t30_state_t *s, void *user_data, int completion_code)
 T.30 phase E callback handler.
typedef int( t30_document_handler_t )(t30_state_t *s, void *user_data, int status)
 T.30 document handler.
typedef void( t30_set_handler_t )(void *user_data, int type, int short_train, int use_hdlc)
 T.30 set a receive or transmit type handler.
typedef void( t30_send_hdlc_handler_t )(void *user_data, const uint8_t *msg, int len)
 T.30 send HDLC handler.

Enumerations

enum  {
  T30_ERR_OK = 0, T30_ERR_CEDTONE, T30_ERR_T0_EXPIRED, T30_ERR_T1_EXPIRED,
  T30_ERR_T3_EXPIRED, T30_ERR_HDLC_CARRIER, T30_ERR_CANNOT_TRAIN, T30_ERR_OPER_INT_FAIL,
  T30_ERR_INCOMPATIBLE, T30_ERR_RX_INCAPABLE, T30_ERR_TX_INCAPABLE, T30_ERR_NORESSUPPORT,
  T30_ERR_NOSIZESUPPORT, T30_ERR_UNEXPECTED, T30_ERR_TX_BADDCS, T30_ERR_TX_BADPG,
  T30_ERR_TX_ECMPHD, T30_ERR_TX_GOTDCN, T30_ERR_TX_INVALRSP, T30_ERR_TX_NODIS,
  T30_ERR_TX_PHBDEAD, T30_ERR_TX_PHDDEAD, T30_ERR_TX_T5EXP, T30_ERR_RX_ECMPHD,
  T30_ERR_RX_GOTDCS, T30_ERR_RX_INVALCMD, T30_ERR_RX_NOCARRIER, T30_ERR_RX_NOEOL,
  T30_ERR_RX_NOFAX, T30_ERR_RX_T2EXPDCN, T30_ERR_RX_T2EXPD, T30_ERR_RX_T2EXPFAX,
  T30_ERR_RX_T2EXPMPS, T30_ERR_RX_T2EXPRR, T30_ERR_RX_T2EXP, T30_ERR_RX_DCNWHY,
  T30_ERR_RX_DCNDATA, T30_ERR_RX_DCNFAX, T30_ERR_RX_DCNPHD, T30_ERR_RX_DCNRRD,
  T30_ERR_RX_DCNNORTN, T30_ERR_FILEERROR, T30_ERR_NOPAGE, T30_ERR_BADTIFF,
  T30_ERR_BADPAGE, T30_ERR_BADTAG, T30_ERR_BADTIFFHDR, T30_ERR_NOMEM,
  T30_ERR_RETRYDCN, T30_ERR_CALLDROPPED, T30_ERR_NOPOLL, T30_ERR_IDENT_UNACCEPTABLE,
  T30_ERR_SUB_UNACCEPTABLE, T30_ERR_SEP_UNACCEPTABLE, T30_ERR_PSA_UNACCEPTABLE, T30_ERR_SID_UNACCEPTABLE,
  T30_ERR_PWD_UNACCEPTABLE, T30_ERR_TSA_UNACCEPTABLE, T30_ERR_IRA_UNACCEPTABLE, T30_ERR_CIA_UNACCEPTABLE,
  T30_ERR_ISP_UNACCEPTABLE, T30_ERR_CSA_UNACCEPTABLE
}
enum  {
  T30_MODEM_NONE = 0, T30_MODEM_PAUSE, T30_MODEM_CED, T30_MODEM_CNG,
  T30_MODEM_V21, T30_MODEM_V27TER_2400, T30_MODEM_V27TER_4800, T30_MODEM_V29_7200,
  T30_MODEM_V29_9600, T30_MODEM_V17_7200, T30_MODEM_V17_9600, T30_MODEM_V17_12000,
  T30_MODEM_V17_14400, T30_MODEM_DONE
}
enum  { T30_FRONT_END_SEND_STEP_COMPLETE = 0, T30_FRONT_END_RECEIVE_COMPLETE, T30_FRONT_END_SIGNAL_PRESENT, T30_FRONT_END_SIGNAL_ABSENT }
enum  {
  T30_SUPPORT_V27TER = 0x01, T30_SUPPORT_V29 = 0x02, T30_SUPPORT_V17 = 0x04, T30_SUPPORT_V34 = 0x08,
  T30_SUPPORT_IAF = 0x10
}
enum  {
  T30_SUPPORT_NO_COMPRESSION = 0x01, T30_SUPPORT_T4_1D_COMPRESSION = 0x02, T30_SUPPORT_T4_2D_COMPRESSION = 0x04, T30_SUPPORT_T6_COMPRESSION = 0x08,
  T30_SUPPORT_T85_COMPRESSION = 0x10, T30_SUPPORT_T43_COMPRESSION = 0x20, T30_SUPPORT_T45_COMPRESSION = 0x40
}
enum  {
  T30_SUPPORT_STANDARD_RESOLUTION = 0x01, T30_SUPPORT_FINE_RESOLUTION = 0x02, T30_SUPPORT_SUPERFINE_RESOLUTION = 0x04, T30_SUPPORT_R4_RESOLUTION = 0x10000,
  T30_SUPPORT_R8_RESOLUTION = 0x20000, T30_SUPPORT_R16_RESOLUTION = 0x40000, T30_SUPPORT_300_300_RESOLUTION = 0x100000, T30_SUPPORT_400_400_RESOLUTION = 0x200000,
  T30_SUPPORT_600_600_RESOLUTION = 0x400000, T30_SUPPORT_1200_1200_RESOLUTION = 0x800000, T30_SUPPORT_300_600_RESOLUTION = 0x1000000, T30_SUPPORT_400_800_RESOLUTION = 0x2000000,
  T30_SUPPORT_600_1200_RESOLUTION = 0x4000000
}
enum  {
  T30_SUPPORT_215MM_WIDTH = 0x01, T30_SUPPORT_255MM_WIDTH = 0x02, T30_SUPPORT_303MM_WIDTH = 0x04, T30_SUPPORT_UNLIMITED_LENGTH = 0x10000,
  T30_SUPPORT_A4_LENGTH = 0x20000, T30_SUPPORT_B4_LENGTH = 0x40000, T30_SUPPORT_US_LETTER_LENGTH = 0x80000, T30_SUPPORT_US_LEGAL_LENGTH = 0x100000
}
enum  {
  T30_SUPPORT_IDENTIFICATION = 0x01, T30_SUPPORT_SELECTIVE_POLLING = 0x02, T30_SUPPORT_POLLED_SUB_ADDRESSING = 0x04, T30_SUPPORT_MULTIPLE_SELECTIVE_POLLING = 0x08,
  T30_SUPPORT_SUB_ADDRESSING = 0x10, T30_SUPPORT_TRANSMITTING_SUBSCRIBER_INTERNET_ADDRESS = 0x20, T30_SUPPORT_INTERNET_ROUTING_ADDRESS = 0x40, T30_SUPPORT_CALLING_SUBSCRIBER_INTERNET_ADDRESS = 0x80,
  T30_SUPPORT_INTERNET_SELECTIVE_POLLING_ADDRESS = 0x100, T30_SUPPORT_CALLED_SUBSCRIBER_INTERNET_ADDRESS = 0x200, T30_SUPPORT_FIELD_NOT_VALID = 0x400, T30_SUPPORT_COMMAND_REPEAT = 0x800
}
enum  {
  T30_IAF_MODE_T37 = 0x01, T30_IAF_MODE_T38 = 0x02, T30_IAF_MODE_FLOW_CONTROL = 0x04, T30_IAF_MODE_CONTINUOUS_FLOW = 0x08,
  T30_IAF_MODE_NO_TCF = 0x10, T30_IAF_MODE_NO_FILL_BITS = 0x20, T30_IAF_MODE_NO_INDICATORS = 0x40
}

Functions

t30_state_tt30_init (t30_state_t *s, int calling_party, t30_set_handler_t *set_rx_type_handler, void *set_rx_type_user_data, t30_set_handler_t *set_tx_type_handler, void *set_tx_type_user_data, t30_send_hdlc_handler_t *send_hdlc_handler, void *send_hdlc_user_data)
 Initialise a T.30 context.
int t30_release (t30_state_t *s)
 Release a T.30 context.
int t30_free (t30_state_t *s)
 Free a T.30 context.
int t30_restart (t30_state_t *s)
 Restart a T.30 context.
void t30_terminate (t30_state_t *s)
 Cleanup a T.30 context if the call terminates.
void t30_front_end_status (void *user_data, int status)
 Inform the T.30 engine of a status change in the front end (end of tx, rx signal change, etc.).
int t30_non_ecm_get_bit (void *user_data)
 Get a bit of received non-ECM image data.
int t30_non_ecm_get_byte (void *user_data)
 Get a byte of received non-ECM image data.
int t30_non_ecm_get_chunk (void *user_data, uint8_t buf[], int max_len)
 Get a bit of received non-ECM image data.
void t30_non_ecm_put_bit (void *user_data, int bit)
 Process a bit of received non-ECM image data.
void t30_non_ecm_put_byte (void *user_data, int byte)
 Process a byte of received non-ECM image data.
void t30_non_ecm_put_chunk (void *user_data, const uint8_t buf[], int len)
 Process a chunk of received non-ECM image data.
void t30_hdlc_accept (void *user_data, const uint8_t *msg, int len, int ok)
 Process a received HDLC frame.
void t30_timer_update (t30_state_t *s, int samples)
 Report the passage of time to the T.30 engine.
void t30_get_transfer_statistics (t30_state_t *s, t30_stats_t *t)
 Get the current transfer statistics.
void t30_local_interrupt_request (t30_state_t *s, int state)
 Request a local interrupt of FAX exchange.

Detailed Description


Typedef Documentation

typedef int( t30_document_handler_t)(t30_state_t *s, void *user_data, int status)

T.30 document handler.

T.30 document handler.

Parameters:
sThe T.30 context.
user_dataAn opaque pointer.
resultThe document event code.
typedef int( t30_phase_b_handler_t)(t30_state_t *s, void *user_data, int result)

T.30 phase B callback handler.

T.30 phase B callback handler. This handler can be used to process addition information available in some FAX calls, such as passwords. The callback handler can access whatever additional information might have been received, using t30_get_received_info().

Parameters:
sThe T.30 context.
user_dataAn opaque pointer.
resultThe phase B event code.
Returns:
The new status. Normally, T30_ERR_OK is returned.
typedef int( t30_phase_d_handler_t)(t30_state_t *s, void *user_data, int result)

T.30 phase D callback handler.

T.30 phase D callback handler.

Parameters:
sThe T.30 context.
user_dataAn opaque pointer.
resultThe phase D event code.
Returns:
The new status. Normally, T30_ERR_OK is returned.
typedef void( t30_phase_e_handler_t)(t30_state_t *s, void *user_data, int completion_code)

T.30 phase E callback handler.

T.30 phase E callback handler.

Parameters:
sThe T.30 context.
user_dataAn opaque pointer.
completion_codeThe phase E completion code.
typedef void( t30_send_hdlc_handler_t)(void *user_data, const uint8_t *msg, int len)

T.30 send HDLC handler.

T.30 send HDLC handler.

Parameters:
user_dataAn opaque pointer.
msgThe HDLC message.
lenThe length of the message.
typedef void( t30_set_handler_t)(void *user_data, int type, int short_train, int use_hdlc)

T.30 set a receive or transmit type handler.

T.30 set a receive or transmit type handler.

Parameters:
user_dataAn opaque pointer.
typeThe modem, tone or silence to be sent or received.
short_trainTRUE if the short training sequence should be used (where one exists).
use_hdlcFALSE for bit stream, TRUE for HDLC framing.

Enumeration Type Documentation

anonymous enum

T.30 protocol completion codes, at phase E.

Enumerator:
T30_ERR_CEDTONE 

OK

T30_ERR_T0_EXPIRED 

The CED tone exceeded 5s

T30_ERR_T1_EXPIRED 

Timed out waiting for initial communication

T30_ERR_T3_EXPIRED 

Timed out waiting for the first message

T30_ERR_HDLC_CARRIER 

Timed out waiting for procedural interrupt

T30_ERR_CANNOT_TRAIN 

The HDLC carrier did not stop in a timely manner

T30_ERR_OPER_INT_FAIL 

Failed to train with any of the compatible modems

T30_ERR_INCOMPATIBLE 

Operator intervention failed

T30_ERR_RX_INCAPABLE 

Far end is not compatible

T30_ERR_TX_INCAPABLE 

Far end is not able to receive

T30_ERR_NORESSUPPORT 

Far end is not able to transmit

T30_ERR_NOSIZESUPPORT 

Far end cannot receive at the resolution of the image

T30_ERR_UNEXPECTED 

Far end cannot receive at the size of image

T30_ERR_TX_BADDCS 

Unexpected message received

T30_ERR_TX_BADPG 

Received bad response to DCS or training

T30_ERR_TX_ECMPHD 

Received a DCN from remote after sending a page

T30_ERR_TX_GOTDCN 

Invalid ECM response received from receiver

T30_ERR_TX_INVALRSP 

Received a DCN while waiting for a DIS

T30_ERR_TX_NODIS 

Invalid response after sending a page

T30_ERR_TX_PHBDEAD 

Received other than DIS while waiting for DIS

T30_ERR_TX_PHDDEAD 

Received no response to DCS, training or TCF

T30_ERR_TX_T5EXP 

No response after sending a page

T30_ERR_RX_ECMPHD 

Timed out waiting for receiver ready (ECM mode)

T30_ERR_RX_GOTDCS 

Invalid ECM response received from transmitter

T30_ERR_RX_INVALCMD 

DCS received while waiting for DTC

T30_ERR_RX_NOCARRIER 

Unexpected command after page received

T30_ERR_RX_NOEOL 

Carrier lost during fax receive

T30_ERR_RX_NOFAX 

Timed out while waiting for EOL (end Of line)

T30_ERR_RX_T2EXPDCN 

Timed out while waiting for first line

T30_ERR_RX_T2EXPD 

Timer T2 expired while waiting for DCN

T30_ERR_RX_T2EXPFAX 

Timer T2 expired while waiting for phase D

T30_ERR_RX_T2EXPMPS 

Timer T2 expired while waiting for fax page

T30_ERR_RX_T2EXPRR 

Timer T2 expired while waiting for next fax page

T30_ERR_RX_T2EXP 

Timer T2 expired while waiting for RR command

T30_ERR_RX_DCNWHY 

Timer T2 expired while waiting for NSS, DCS or MCF

T30_ERR_RX_DCNDATA 

Unexpected DCN while waiting for DCS or DIS

T30_ERR_RX_DCNFAX 

Unexpected DCN while waiting for image data

T30_ERR_RX_DCNPHD 

Unexpected DCN while waiting for EOM, EOP or MPS

T30_ERR_RX_DCNRRD 

Unexpected DCN after EOM or MPS sequence

T30_ERR_RX_DCNNORTN 

Unexpected DCN after RR/RNR sequence

T30_ERR_FILEERROR 

Unexpected DCN after requested retransmission

T30_ERR_NOPAGE 

TIFF/F file cannot be opened

T30_ERR_BADTIFF 

TIFF/F page not found

T30_ERR_BADPAGE 

TIFF/F format is not compatible

T30_ERR_BADTAG 

TIFF/F page number tag missing

T30_ERR_BADTIFFHDR 

Incorrect values for TIFF/F tags

T30_ERR_NOMEM 

Bad TIFF/F header - incorrect values in fields

T30_ERR_RETRYDCN 

Cannot allocate memory for more pages

T30_ERR_CALLDROPPED 

Disconnected after permitted retries

T30_ERR_NOPOLL 

The call dropped prematurely

T30_ERR_IDENT_UNACCEPTABLE 

Poll not accepted

T30_ERR_SUB_UNACCEPTABLE 

Far end's ident is not acceptable

T30_ERR_SEP_UNACCEPTABLE 

Far end's sub-address is not acceptable

T30_ERR_PSA_UNACCEPTABLE 

Far end's selective polling address is not acceptable

T30_ERR_SID_UNACCEPTABLE 

Far end's polled sub-address is not acceptable

T30_ERR_PWD_UNACCEPTABLE 

Far end's sender identification is not acceptable

T30_ERR_TSA_UNACCEPTABLE 

Far end's password is not acceptable

T30_ERR_IRA_UNACCEPTABLE 

Far end's transmitting subscriber internet address is not acceptable

T30_ERR_CIA_UNACCEPTABLE 

Far end's internet routing address is not acceptable

T30_ERR_ISP_UNACCEPTABLE 

Far end's calling subscriber internet address is not acceptable

T30_ERR_CSA_UNACCEPTABLE 

Far end's internet selective polling address is not acceptable

Far end's called subscriber internet address is not acceptable

anonymous enum

I/O modes for the T.30 protocol.

anonymous enum
Enumerator:
T30_FRONT_END_RECEIVE_COMPLETE 

The current receive has completed. This is only needed to report an unexpected end of the receive operation, as might happen with T.38 dying.

anonymous enum
Enumerator:
T30_SUPPORT_IDENTIFICATION 

Enable support of identification, through the SID and/or PWD frames

T30_SUPPORT_SELECTIVE_POLLING 

Enable support of selective polling, through the SEP frame

T30_SUPPORT_POLLED_SUB_ADDRESSING 

Enable support of polling sub-addressing, through the PSA frame

T30_SUPPORT_MULTIPLE_SELECTIVE_POLLING 

Enable support of multiple selective polling, through repeated used of the SEP and PSA frames

T30_SUPPORT_SUB_ADDRESSING 

Enable support of sub-addressing, through the SUB frame

T30_SUPPORT_TRANSMITTING_SUBSCRIBER_INTERNET_ADDRESS 

Enable support of transmitting subscriber internet address, through the TSA frame

T30_SUPPORT_INTERNET_ROUTING_ADDRESS 

Enable support of internet routing address, through the IRA frame

T30_SUPPORT_CALLING_SUBSCRIBER_INTERNET_ADDRESS 

Enable support of calling subscriber internet address, through the CIA frame

T30_SUPPORT_INTERNET_SELECTIVE_POLLING_ADDRESS 

Enable support of internet selective polling address, through the ISP frame

T30_SUPPORT_CALLED_SUBSCRIBER_INTERNET_ADDRESS 

Enable support of called subscriber internet address, through the CSA frame

T30_SUPPORT_FIELD_NOT_VALID 

Enable support of the field not valid (FNV) frame

T30_SUPPORT_COMMAND_REPEAT 

Enable support of the command repeat (CRP) frame

anonymous enum
Enumerator:
T30_IAF_MODE_CONTINUOUS_FLOW 

Continuous flow mode means data is sent as fast as possible, usually across the Internet, where speed is not constrained by a PSTN modem.

T30_IAF_MODE_NO_TCF 

No TCF means TCF is not exchanged. The end points must sort out usable speed issues locally.

T30_IAF_MODE_NO_FILL_BITS 

No fill bits means do not insert fill bits, even if the T.30 messages request them.

T30_IAF_MODE_NO_INDICATORS 

No indicators means do not send indicator messages when using T.38.


Function Documentation

int t30_free ( t30_state_t s)

Free a T.30 context.

Free a T.30 context.

Parameters:
sThe T.30 context.
Returns:
0 for OK, else -1.

References t30_release().

void t30_front_end_status ( void *  user_data,
int  status 
)
void t30_hdlc_accept ( void *  user_data,
const uint8_t *  msg,
int  len,
int  ok 
)
t30_state_t* t30_init ( t30_state_t s,
int  calling_party,
t30_set_handler_t set_rx_type_handler,
void *  set_rx_type_user_data,
t30_set_handler_t set_tx_type_handler,
void *  set_tx_type_user_data,
t30_send_hdlc_handler_t send_hdlc_handler,
void *  send_hdlc_user_data 
)

Initialise a T.30 context.

Initialise a T.30 context.

Parameters:
sThe T.30 context.
calling_partyTRUE if the context is for a calling party. FALSE if the context is for an answering party.
set_rx_type_handler
set_rx_type_user_data
set_tx_type_handler
set_tx_type_user_data
send_hdlc_handler
send_hdlc_user_data
Returns:
A pointer to the context, or NULL if there was a problem.

References t30_state_s::calling_party, t30_state_s::local_min_scan_time_code, t30_state_s::logging, t30_state_s::output_encoding, t30_state_s::send_hdlc_handler, t30_state_s::send_hdlc_user_data, t30_state_s::set_rx_type_handler, t30_state_s::set_rx_type_user_data, t30_state_s::set_tx_type_handler, t30_state_s::set_tx_type_user_data, t30_state_s::supported_compressions, t30_state_s::supported_image_sizes, t30_state_s::supported_modems, t30_state_s::supported_resolutions, and t30_restart().

Referenced by fax_init(), and t38_terminal_init().

void t30_local_interrupt_request ( t30_state_t s,
int  state 
)

Request a local interrupt of FAX exchange.

Request a local interrupt of FAX exchange.

Parameters:
sThe T.30 context.
stateTRUE to enable interrupt request, else FALSE.

References t30_state_s::local_interrupt_pending, T30_PIN, T30_PIP, and t30_state_s::timer_t3.

int t30_non_ecm_get_bit ( void *  user_data)

Get a bit of received non-ECM image data.

Get a bit of received non-ECM image data.

Parameters:
user_dataAn opaque pointer, which must point to the T.30 context.
Returns:
The next bit to transmit.

References t30_state_s::logging, PUTBIT_END_OF_DATA, span_log(), t30_state_s::state, t30_state_s::t4, t4_tx_get_bit(), and t30_state_s::training_test_bits.

Referenced by fax_init().

int t30_non_ecm_get_byte ( void *  user_data)

Get a byte of received non-ECM image data.

Get a byte of received non-ECM image data.

Parameters:
user_dataAn opaque pointer, which must point to the T.30 context.
Returns:
The next byte to transmit.

References t30_state_s::logging, span_log(), t30_state_s::state, t30_state_s::t4, t4_tx_get_byte(), and t30_state_s::training_test_bits.

int t30_non_ecm_get_chunk ( void *  user_data,
uint8_t  buf[],
int  max_len 
)

Get a bit of received non-ECM image data.

Get a chunk of received non-ECM image data.

Parameters:
user_dataAn opaque pointer, which must point to the T.30 context.
bufThe buffer to contain the data.
max_lenThe maximum length of the chunk.
Returns:
The actual length of the chunk.

References t30_state_s::logging, span_log(), t30_state_s::state, t30_state_s::t4, t4_tx_get_chunk(), and t30_state_s::training_test_bits.

void t30_non_ecm_put_byte ( void *  user_data,
int  byte 
)

Process a byte of received non-ECM image data.

Process a byte of received non-ECM image data.

Parameters:
user_dataAn opaque pointer, which must point to the T.30 context.
byteThe received byte.

References t30_state_s::state, t30_state_s::t4, t4_rx_put_byte(), t30_state_s::timer_is_t4, t30_state_s::timer_t2_t4, t30_state_s::training_current_zeros, and t30_state_s::training_most_zeros.

void t30_non_ecm_put_chunk ( void *  user_data,
const uint8_t  buf[],
int  len 
)

Process a chunk of received non-ECM image data.

Process a chunk of received non-ECM image data.

Parameters:
user_dataAn opaque pointer, which must point to the T.30 context.
bufThe buffer containing the received data.
lenThe length of the data in buf.

References t30_state_s::state, t30_state_s::t4, t4_rx_put_chunk(), t30_state_s::timer_is_t4, t30_state_s::timer_t2_t4, t30_state_s::training_current_zeros, and t30_state_s::training_most_zeros.

int t30_release ( t30_state_t s)

Release a T.30 context.

Release a T.30 context.

Parameters:
sThe T.30 context.
Returns:
0 for OK, else -1.

References t30_state_s::t4, t4_rx_end(), and t4_tx_end().

Referenced by fax_free(), fax_release(), t30_free(), t38_terminal_free(), and t38_terminal_release().

void t30_terminate ( t30_state_t s)

Cleanup a T.30 context if the call terminates.

Cleanup a T.30 context if the call terminates.

Parameters:
sThe T.30 context.

References t30_state_s::phase, t30_state_s::phase_e_handler, t30_state_s::phase_e_user_data, t30_state_s::state, and T30_ERR_CALLDROPPED.

void t30_timer_update ( t30_state_t s,
int  samples 
)

Report the passage of time to the T.30 engine.

Report the passage of time to the T.30 engine.

Parameters:
sThe T.30 context.
samplesThe time change in 1/8000th second steps.

References t30_state_s::far_end_detected, t30_state_s::timer_is_t4, t30_state_s::timer_t0_t1, t30_state_s::timer_t2_t4, t30_state_s::timer_t3, and t30_state_s::timer_t5.

Referenced by fax_rx().