spandsp 0.0.6
t38_non_ecm_buffer.h File Reference

Go to the source code of this file.

Macros

#define T38_NON_ECM_TX_BUF_LEN   16384
 

Typedefs

typedef struct t38_non_ecm_buffer_state_s t38_non_ecm_buffer_state_t
 A flow controlled non-ECM image data buffer, for buffering T.38 to analogue modem data.
 

Functions

t38_non_ecm_buffer_state_tt38_non_ecm_buffer_init (t38_non_ecm_buffer_state_t *s, int mode, int min_row_bits)
 Initialise a T.38 rate adapting non-ECM buffer context. More...
 
int t38_non_ecm_buffer_release (t38_non_ecm_buffer_state_t *s)
 
int t38_non_ecm_buffer_free (t38_non_ecm_buffer_state_t *s)
 
void t38_non_ecm_buffer_set_mode (t38_non_ecm_buffer_state_t *s, int mode, int min_row_bits)
 Set the mode of a T.38 rate adapting non-ECM buffer context. More...
 
void t38_non_ecm_buffer_inject (t38_non_ecm_buffer_state_t *s, const uint8_t *buf, int len)
 Inject data to T.38 rate adapting non-ECM buffer context. More...
 
void t38_non_ecm_buffer_push (t38_non_ecm_buffer_state_t *s)
 Inform a T.38 rate adapting non-ECM buffer context that the incoming data has finished, and the contents of the buffer should be played out as quickly as possible. More...
 
void t38_non_ecm_buffer_report_input_status (t38_non_ecm_buffer_state_t *s, logging_state_t *logging)
 Report the input status of a T.38 rate adapting non-ECM buffer context to the specified logging context. More...
 
void t38_non_ecm_buffer_report_output_status (t38_non_ecm_buffer_state_t *s, logging_state_t *logging)
 Report the output status of a T.38 rate adapting non-ECM buffer context to the specified logging context. More...
 
 SPAN_DECLARE_NONSTD (int) t38_non_ecm_buffer_get_bit(void *user_data)
 Get the next bit of data from a T.38 rate adapting non-ECM buffer context. More...
 

Macro Definition Documentation

◆ T38_NON_ECM_TX_BUF_LEN

#define T38_NON_ECM_TX_BUF_LEN   16384

The buffer length much be a power of two. The chosen length is big enough for over 9s of data at the V.17 14,400bps rate.

Function Documentation

◆ SPAN_DECLARE_NONSTD()

SPAN_DECLARE_NONSTD ( int  )

Get the next bit of data from a T.38 rate adapting non-ECM buffer context.

Parameters
user_dataThe buffer context, cast to a void pointer.
Returns
The next bit, or one of the values indicating a change of modem status.

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.

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.

Parameters
sThe FAX context.
ampThe audio sample buffer.
lenThe number of samples in the buffer.
Returns
The number of samples unprocessed. This should only be non-zero if the software has reached the end of the FAX call.

Apply fake T.30 receive processing when a block of audio samples is missing (e.g due to packet loss).

Parameters
sThe FAX context.
lenThe number of samples to fake.
Returns
The number of samples unprocessed. This should only be non-zero if the software has reached the end of the FAX call.

Apply T.30 transmit processing to generate a block of audio samples.

Parameters
sThe FAX context.
ampThe audio sample buffer.
max_lenThe number of samples to be generated.
Returns
The number of samples actually generated. This will be zero when there is nothing to send.

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.

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.

Parameters
user_dataAn opaque point which must point to a transmitter context.
Returns
the next bit, or PUTBIT_END_OF_DATA to indicate the data stream has ended.

Apply fake T.30 receive processing when a block of audio samples is missing (e.g due to packet loss).

Parameters
sThe FAX context.
lenThe number of samples to fake.
Returns
The number of samples unprocessed. This should only be non-zero if the software has reached the end of the FAX call.

Apply T.30 transmit processing to generate a block of audio samples.

Parameters
sThe FAX context.
ampThe audio sample buffer.
max_lenThe number of samples to be generated.
Returns
The number of samples actually generated. This will be zero when there is nothing to send.

Process a block of received FSK modem audio samples.

Parameters
sThe modem context.
ampThe audio sample buffer.
lenThe number of samples in the buffer.
Returns
The number of samples unprocessed.

Fake processing of a missing block of received FSK modem audio samples (e.g due to packet loss).

Parameters
sThe modem context.
lenThe number of samples to fake.
Returns
The number of samples unprocessed.
Parameters
sA pointer to an HDLC transmitter context.
Returns
The next byte for transmission.
Parameters
sA pointer to an HDLC transmitter context.
bufThe buffer for the data.
max_lenThe number of bytes to get.
Returns
The number of bytes actually got.
Parameters
sThe context.
ampAn array of signal samples.
lenThe number of samples in the array.
Returns
The number of unprocessed samples.

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.

Parameters
user_dataThe context.
ampThe signal.buffer
lenThe length of the signal buffer
Returns
0.

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.

Parameters
user_dataThe context.
lenThe length of the signal buffer
Returns
0.

Fake processing of a missing block of received T.31 modem audio samples (e.g due to packet loss).

Parameters
sThe T.31 modem context.
lenThe number of samples to fake.
Returns
The number of samples unprocessed.

Generate a block of T.31 modem audio samples.

Parameters
sThe T.31 modem context.
ampThe audio sample buffer.
max_lenThe number of samples to be generated.
Returns
The number of samples actually generated.
Parameters
sThe T.38 context.
bufThe packet contents.
lenThe length of the packet contents.
seq_noThe packet sequence number, used for logging purposes.
Returns
The length of the packet processed, or -1 if there is an error in the packet, or too few bytes of data to complete it.

Apply fake processing when a block of audio samples is missing (e.g due to packet loss).

Parameters
sThe T.38 context.
lenThe number of samples to fake.
Returns
The number of samples unprocessed. This should only be non-zero if the software has reached the end of the FAX call.

Generate a block of FAX audio samples.

Parameters
sThe T.38 context.
ampThe audio sample buffer.
max_lenThe number of samples to be generated.
Returns
The number of samples actually generated.

Fake processing of a missing block of received V.17 modem audio samples. (e.g due to packet loss).

Parameters
sThe modem context.
lenThe number of samples to fake.
Returns
The number of samples unprocessed.

Process a block of received V.18 audio samples.

Parameters
sThe V.18 context.
ampThe audio sample buffer.
lenThe 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).

Parameters
sThe modem context.
lenThe number of samples to fake.
Returns
The number of samples unprocessed.

Generate a block of V.22bis modem audio samples.

Parameters
sThe modem context.
ampThe audio sample buffer.
lenThe number of samples to be generated.
Returns
The number of samples actually generated.

Fake processing of a missing block of received V.27ter modem audio samples. (e.g due to packet loss).

Parameters
sThe modem context.
lenThe number of samples to fake.
Returns
The number of samples unprocessed.

Fake processing of a missing block of received V.29 modem audio samples. (e.g due to packet loss).

Parameters
sThe modem context.
lenThe number of samples to fake.
Returns
The number of samples unprocessed.

Process a block of received V.8 audio samples.

Parameters
sThe V.8 context.
ampThe audio sample buffer.
lenThe 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.

Parameters
sThe FAX context.
ampThe audio sample buffer.
lenThe number of samples in the buffer.
Returns
The number of samples unprocessed. This should only be non-zero if the software has reached the end of the FAX call.

Apply fake T.30 receive processing when a block of audio samples is missing (e.g due to packet loss).

Parameters
sThe FAX context.
lenThe number of samples to fake.
Returns
The number of samples unprocessed. This should only be non-zero if the software has reached the end of the FAX call.

Apply T.30 transmit processing to generate a block of audio samples.

Parameters
sThe FAX context.
ampThe audio sample buffer.
max_lenThe number of samples to be generated.
Returns
The number of samples actually generated. This will be zero when there is nothing to send.

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.

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.

Parameters
sThe modem context.
ampThe audio sample buffer.
lenThe number of samples to be generated.
Returns
The number of samples actually generated.

Process a block of received FSK modem audio samples.

Parameters
sThe modem context.
ampThe audio sample buffer.
lenThe number of samples in the buffer.
Returns
The number of samples unprocessed.

Fake processing of a missing block of received FSK modem audio samples (e.g due to packet loss).

Parameters
sThe modem context.
lenThe number of samples to fake.
Returns
The number of samples unprocessed.

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.

Get the next sequence of bytes for transmission.

Get the next byte for transmission.

Parameters
sA pointer to an HDLC transmitter context.
Returns
The next bit for transmission.
Parameters
sA pointer to an HDLC transmitter context.
Returns
The next byte for transmission.
Parameters
sA pointer to an HDLC transmitter context.
bufThe buffer for the data.
max_lenThe number of bytes to get.
Returns
The number of bytes actually got.

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.

Process a block of samples through an instance of the modem connect tones detector.

Parameters
sThe context.
ampAn array of signal samples.
lenThe number of samples to generate.
Returns
The number of samples generated.
Parameters
sThe context.
ampAn array of signal samples.
lenThe number of samples in the array.
Returns
The number of unprocessed 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.

Dummy receive fillin callback.

Dummy receive callback.

Generate a block of silent audio samples.

Parameters
sThe silence generator context.
ampThe audio sample buffer.
max_lenThe number of samples to be generated.
Returns
The number of samples actually generated. This will be zero when there is nothing to send.

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.

Parameters
user_dataThe context.
ampThe signal.buffer
lenThe length of the signal buffer
Returns
0.

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.

Parameters
user_dataThe context.
lenThe length of the signal buffer
Returns
0.

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.

Parameters
sThe T.31 modem context.
ampThe audio sample buffer.
lenThe number of samples in the buffer.
Returns
The number of samples unprocessed.

Fake processing of a missing block of received T.31 modem audio samples (e.g due to packet loss).

Parameters
sThe T.31 modem context.
lenThe number of samples to fake.
Returns
The number of samples unprocessed.

Generate a block of T.31 modem audio samples.

Parameters
sThe T.31 modem context.
ampThe audio sample buffer.
max_lenThe number of samples to be generated.
Returns
The number of samples actually generated.

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.

Process a received T.38 IFP packet from a reliable stream (e.g. TCP).

Parameters
sThe T.38 context.
bufThe packet contents.
lenThe length of the packet contents.
seq_noThe packet sequence number.
Returns
0 for OK, else -1.
Parameters
sThe T.38 context.
bufThe packet contents.
lenThe length of the packet contents.
seq_noThe packet sequence number, used for logging purposes.
Returns
The length of the packet processed, or -1 if there is an error in the packet, or too few bytes of data to complete it.

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 FAX audio samples.

Apply fake received audio processing.

Process a block of received FAX audio samples.

Parameters
sThe T.38 context.
ampThe audio sample buffer.
lenThe number of samples in the buffer.
Returns
The number of samples unprocessed.

Apply fake processing when a block of audio samples is missing (e.g due to packet loss).

Parameters
sThe T.38 context.
lenThe number of samples to fake.
Returns
The number of samples unprocessed. This should only be non-zero if the software has reached the end of the FAX call.

Generate a block of FAX audio samples.

Parameters
sThe T.38 context.
ampThe audio sample buffer.
max_lenThe number of samples to be generated.
Returns
The number of samples actually generated.

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.

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.

Parameters
user_dataAn opaque point which must point to a transmitter context.
Returns
the next bit, or PUTBIT_END_OF_DATA to indicate the data stream has ended.

Apply fake T.30 receive processing when a block of audio samples is missing (e.g due to packet loss).

Parameters
sThe FAX context.
lenThe number of samples to fake.
Returns
The number of samples unprocessed. This should only be non-zero if the software has reached the end of the FAX call.

Apply T.30 transmit processing to generate a block of audio samples.

Parameters
sThe FAX context.
ampThe audio sample buffer.
max_lenThe number of samples to be generated.
Returns
The number of samples actually generated. This will be zero when there is nothing to send.

Process a block of received FSK modem audio samples.

Parameters
sThe modem context.
ampThe audio sample buffer.
lenThe number of samples in the buffer.
Returns
The number of samples unprocessed.

Fake processing of a missing block of received FSK modem audio samples (e.g due to packet loss).

Parameters
sThe modem context.
lenThe number of samples to fake.
Returns
The number of samples unprocessed.
Parameters
sA pointer to an HDLC transmitter context.
Returns
The next byte for transmission.
Parameters
sA pointer to an HDLC transmitter context.
bufThe buffer for the data.
max_lenThe number of bytes to get.
Returns
The number of bytes actually got.
Parameters
sThe context.
ampAn array of signal samples.
lenThe number of samples in the array.
Returns
The number of unprocessed samples.

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.

Parameters
user_dataThe context.
ampThe signal.buffer
lenThe length of the signal buffer
Returns
0.

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.

Parameters
user_dataThe context.
lenThe length of the signal buffer
Returns
0.

Fake processing of a missing block of received T.31 modem audio samples (e.g due to packet loss).

Parameters
sThe T.31 modem context.
lenThe number of samples to fake.
Returns
The number of samples unprocessed.

Generate a block of T.31 modem audio samples.

Parameters
sThe T.31 modem context.
ampThe audio sample buffer.
max_lenThe number of samples to be generated.
Returns
The number of samples actually generated.
Parameters
sThe T.38 context.
bufThe packet contents.
lenThe length of the packet contents.
seq_noThe packet sequence number, used for logging purposes.
Returns
The length of the packet processed, or -1 if there is an error in the packet, or too few bytes of data to complete it.

Apply fake processing when a block of audio samples is missing (e.g due to packet loss).

Parameters
sThe T.38 context.
lenThe number of samples to fake.
Returns
The number of samples unprocessed. This should only be non-zero if the software has reached the end of the FAX call.

Generate a block of FAX audio samples.

Parameters
sThe T.38 context.
ampThe audio sample buffer.
max_lenThe number of samples to be generated.
Returns
The number of samples actually generated.

Fake processing of a missing block of received V.17 modem audio samples. (e.g due to packet loss).

Parameters
sThe modem context.
lenThe number of samples to fake.
Returns
The number of samples unprocessed.

Process a block of received V.18 audio samples.

Parameters
sThe V.18 context.
ampThe audio sample buffer.
lenThe 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).

Parameters
sThe modem context.
lenThe number of samples to fake.
Returns
The number of samples unprocessed.

Generate a block of V.22bis modem audio samples.

Parameters
sThe modem context.
ampThe audio sample buffer.
lenThe number of samples to be generated.
Returns
The number of samples actually generated.

Fake processing of a missing block of received V.27ter modem audio samples. (e.g due to packet loss).

Parameters
sThe modem context.
lenThe number of samples to fake.
Returns
The number of samples unprocessed.

Fake processing of a missing block of received V.29 modem audio samples. (e.g due to packet loss).

Parameters
sThe modem context.
lenThe number of samples to fake.
Returns
The number of samples unprocessed.

Process a block of received V.8 audio samples.

Parameters
sThe V.8 context.
ampThe audio sample buffer.
lenThe 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.

Parameters
sThe FAX context.
ampThe audio sample buffer.
lenThe number of samples in the buffer.
Returns
The number of samples unprocessed. This should only be non-zero if the software has reached the end of the FAX call.

Apply fake T.30 receive processing when a block of audio samples is missing (e.g due to packet loss).

Parameters
sThe FAX context.
lenThe number of samples to fake.
Returns
The number of samples unprocessed. This should only be non-zero if the software has reached the end of the FAX call.

Apply T.30 transmit processing to generate a block of audio samples.

Parameters
sThe FAX context.
ampThe audio sample buffer.
max_lenThe number of samples to be generated.
Returns
The number of samples actually generated. This will be zero when there is nothing to send.

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.

Parameters
sThe modem context.
ampThe audio sample buffer.
lenThe number of samples to be generated.
Returns
The number of samples actually generated.

Process a block of received FSK modem audio samples.

Parameters
sThe modem context.
ampThe audio sample buffer.
lenThe number of samples in the buffer.
Returns
The number of samples unprocessed.

Fake processing of a missing block of received FSK modem audio samples (e.g due to packet loss).

Parameters
sThe modem context.
lenThe number of samples to fake.
Returns
The number of samples unprocessed.

Get the next bit of a transmitted serial bit stream.

Get the next sequence of bytes for transmission.

Get the next byte for transmission.

Parameters
sA pointer to an HDLC transmitter context.
Returns
The next bit for transmission.
Parameters
sA pointer to an HDLC transmitter context.
Returns
The next byte for transmission.
Parameters
sA pointer to an HDLC transmitter context.
bufThe buffer for the data.
max_lenThe number of bytes to get.
Returns
The number of bytes actually got.

Get the next bit of a transmitted serial bit stream.

Process a block of samples through an instance of the modem connect tones detector.

Parameters
sThe context.
ampAn array of signal samples.
lenThe number of samples to generate.
Returns
The number of samples generated.
Parameters
sThe context.
ampAn array of signal samples.
lenThe number of samples in the array.
Returns
The number of unprocessed samples.

Get the next bit of a transmitted serial bit stream.

Dummy receive fillin callback.

Dummy receive callback.

Generate a block of silent audio samples.

Parameters
sThe silence generator context.
ampThe audio sample buffer.
max_lenThe number of samples to be generated.
Returns
The number of samples actually generated. This will be zero when there is nothing to send.

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.

Parameters
user_dataThe context.
ampThe signal.buffer
lenThe length of the signal buffer
Returns
0.

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.

Parameters
user_dataThe context.
lenThe length of the signal buffer
Returns
0.

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.

Parameters
sThe T.31 modem context.
ampThe audio sample buffer.
lenThe number of samples in the buffer.
Returns
The number of samples unprocessed.

Fake processing of a missing block of received T.31 modem audio samples (e.g due to packet loss).

Parameters
sThe T.31 modem context.
lenThe number of samples to fake.
Returns
The number of samples unprocessed.

Generate a block of T.31 modem audio samples.

Parameters
sThe T.31 modem context.
ampThe audio sample buffer.
max_lenThe number of samples to be generated.
Returns
The number of samples actually 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).

Parameters
sThe T.38 context.
bufThe packet contents.
lenThe length of the packet contents.
seq_noThe packet sequence number.
Returns
0 for OK, else -1.
Parameters
sThe T.38 context.
bufThe packet contents.
lenThe length of the packet contents.
seq_noThe packet sequence number, used for logging purposes.
Returns
The length of the packet processed, or -1 if there is an error in the packet, or too few bytes of data to complete it.

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.

Parameters
sThe T.38 context.
ampThe audio sample buffer.
lenThe number of samples in the buffer.
Returns
The number of samples unprocessed.

Apply fake processing when a block of audio samples is missing (e.g due to packet loss).

Parameters
sThe T.38 context.
lenThe number of samples to fake.
Returns
The number of samples unprocessed. This should only be non-zero if the software has reached the end of the FAX call.

Generate a block of FAX audio samples.

Parameters
sThe T.38 context.
ampThe audio sample buffer.
max_lenThe number of samples to be generated.
Returns
The number of samples actually generated.

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.

Fake processing of a missing block of received V.17 modem audio samples.

Process a block of received V.17 modem audio samples.

Parameters
sThe modem context.
ampThe audio sample buffer.
lenThe number of samples in the buffer.
Returns
The number of samples unprocessed.

Fake processing of a missing block of received V.17 modem audio samples. (e.g due to packet loss).

Parameters
sThe modem context.
lenThe number of samples to fake.
Returns
The number of samples unprocessed.

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 V.17 modem audio samples.

Parameters
sThe modem context.
ampThe audio sample buffer.
lenThe number of samples to be generated.
Returns
The number of samples actually generated.

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.

Process a block of received V.18 audio samples.

Generate a block of V.18 audio samples.

Parameters
sThe V.18 context.
ampThe audio sample buffer.
max_lenThe number of samples to be generated.
Returns
The number of samples actually generated.

Process a block of received V.18 audio samples.

Parameters
sThe V.18 context.
ampThe audio sample buffer.
lenThe number of samples in the buffer.

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 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.

Parameters
sThe modem context.
ampThe audio sample buffer.
lenThe number of samples in the buffer.
Returns
The number of samples unprocessed.

Fake processing of a missing block of received V.22bis modem audio samples. (e.g due to packet loss).

Parameters
sThe modem context.
lenThe number of samples to fake.
Returns
The number of samples unprocessed.

Generate a block of V.22bis modem audio samples.

Parameters
sThe modem context.
ampThe audio sample buffer.
lenThe number of samples to be generated.
Returns
The number of samples actually generated.

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.

Fake processing of a missing block of received V.27ter modem audio samples.

Process a block of received V.27ter modem audio samples.

Parameters
sThe modem context.
ampThe audio sample buffer.
lenThe number of samples in the buffer.
Returns
The number of samples unprocessed.

Fake processing of a missing block of received V.27ter modem audio samples. (e.g due to packet loss).

Parameters
sThe modem context.
lenThe number of samples to fake.
Returns
The number of samples unprocessed.

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 V.27ter modem audio samples.

Parameters
sThe modem context.
ampThe audio sample buffer.
lenThe number of samples to be generated.
Returns
The number of samples actually generated.

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.

Fake processing of a missing block of received V.29 modem audio samples.

Process a block of received V.29 modem audio samples.

Parameters
sThe modem context.
ampThe audio sample buffer.
lenThe number of samples in the buffer.
Returns
The number of samples unprocessed.

Fake processing of a missing block of received V.29 modem audio samples. (e.g due to packet loss).

Parameters
sThe modem context.
lenThe number of samples to fake.
Returns
The number of samples unprocessed.

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 V.29 modem audio samples.

Parameters
sThe modem context.
ampThe audio sample buffer.
lenThe number of samples to be generated.
Returns
The number of samples actually generated.

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.

Process a block of received V.8 audio samples.

Generate a block of V.8 audio samples.

Parameters
sThe V.8 context.
ampThe audio sample buffer.
max_lenThe number of samples to be generated.
Returns
The number of samples actually generated.

Process a block of received V.8 audio samples.

Parameters
sThe V.8 context.
ampThe audio sample buffer.
lenThe number of samples in the buffer.

◆ t38_non_ecm_buffer_init()

t38_non_ecm_buffer_state_t * t38_non_ecm_buffer_init ( t38_non_ecm_buffer_state_t s,
int  mode,
int  min_row_bits 
)

Initialise a T.38 rate adapting non-ECM buffer context.

Parameters
sThe buffer context.
modeTRUE for image data mode, or FALSE for TCF mode.
bitsThe minimum number of bits per FAX image row.
Returns
A pointer to the buffer context, or NULL if there was a problem.

◆ t38_non_ecm_buffer_inject()

void t38_non_ecm_buffer_inject ( t38_non_ecm_buffer_state_t s,
const uint8_t *  buf,
int  len 
)

Inject data to T.38 rate adapting non-ECM buffer context.

Parameters
sThe buffer context.
bufThe data buffer to be injected.
lenThe length of the data to be injected.

◆ t38_non_ecm_buffer_push()

void t38_non_ecm_buffer_push ( t38_non_ecm_buffer_state_t s)

Inform a T.38 rate adapting non-ECM buffer context that the incoming data has finished, and the contents of the buffer should be played out as quickly as possible.

Parameters
sThe buffer context.

References t38_non_ecm_buffer_state_s::data_finished, t38_non_ecm_buffer_state_s::in_ptr, and t38_non_ecm_buffer_state_s::latest_eol_ptr.

◆ t38_non_ecm_buffer_report_input_status()

void t38_non_ecm_buffer_report_input_status ( t38_non_ecm_buffer_state_t s,
logging_state_t logging 
)

Report the input status of a T.38 rate adapting non-ECM buffer context to the specified logging context.

Parameters
sThe buffer context.
loggingThe logging context.

References t38_non_ecm_buffer_state_s::in_octets, t38_non_ecm_buffer_state_s::min_row_bits_fill_octets, and span_log().

◆ t38_non_ecm_buffer_report_output_status()

void t38_non_ecm_buffer_report_output_status ( t38_non_ecm_buffer_state_t s,
logging_state_t logging 
)

Report the output status of a T.38 rate adapting non-ECM buffer context to the specified logging context.

Parameters
sThe buffer context.
loggingThe logging context.

References t38_non_ecm_buffer_state_s::flow_control_fill_octets, t38_non_ecm_buffer_state_s::out_octets, and span_log().

◆ t38_non_ecm_buffer_set_mode()

void t38_non_ecm_buffer_set_mode ( t38_non_ecm_buffer_state_t s,
int  mode,
int  min_row_bits 
)

Set the mode of a T.38 rate adapting non-ECM buffer context.

Parameters
sThe buffer context.
modeTRUE for image data mode, or FALSE for TCF mode.
bitsThe minimum number of bits per FAX image row.

References t38_non_ecm_buffer_state_s::image_data_mode, and t38_non_ecm_buffer_state_s::min_bits_per_row.