static void v27ter_put_bit(void *user_data, int bit)
{
if (bit < 0)
{
/* Special conditions */
fprintf(stderr, "V.27ter rx status is %s (%d)\n", signal_status_to_str(bit), bit);
switch (bit)
{
case SIG_STATUS_TRAINING_SUCCEEDED:
fast_trained = FAX_V27TER_RX;
t4_begin();
break;
case SIG_STATUS_CARRIER_DOWN:
t4_end();
if (fast_trained == FAX_V27TER_RX)
fast_trained = FAX_NONE;
break;
}
return;
}
if (error_correcting_mode)
{
hdlc_rx_put_bit(&hdlcrx, bit);
}
else
{
if (t4_rx_put_bit(&t4_rx_state, bit))
{
t4_end();
fprintf(stderr, "End of page detected\n");
}
}
//printf("V.27ter Rx bit %d - %d\n", rx_bits++, bit);
}
SPAN_DECLARE(int) t4_rx_end_page(t4_state_t *s)
{
int row;
int i;
if (s->line_encoding == T4_COMPRESSION_ITU_T6)
{
/* Push enough zeros through the decoder to flush out any remaining codes */
for (i = 0; i < 13; i++)
t4_rx_put_bit(s, 0);
}
if (s->t4_t6_rx.curr_bad_row_run)
{
if (s->t4_t6_rx.curr_bad_row_run > s->t4_t6_rx.longest_bad_row_run)
s->t4_t6_rx.longest_bad_row_run = s->t4_t6_rx.curr_bad_row_run;
s->t4_t6_rx.curr_bad_row_run = 0;
}
if (s->image_size == 0)
return -1;
if (s->t4_t6_rx.row_write_handler)
{
for (row = 0; row < s->image_length; row++)
{
if (s->t4_t6_rx.row_write_handler(s->t4_t6_rx.row_write_user_data, s->image_buffer + row*s->bytes_per_row, s->bytes_per_row) < 0)
{
span_log(&s->logging, SPAN_LOG_WARNING, "Write error at row %d.\n", row);
break;
}
}
/* Write a blank row to indicate the end of the image. */
if (s->t4_t6_rx.row_write_handler(s->t4_t6_rx.row_write_user_data, NULL, 0) < 0)
span_log(&s->logging, SPAN_LOG_WARNING, "Write error at row %d.\n", row);
}
else
{
write_tiff_image(s);
}
s->t4_t6_rx.rx_bits = 0;
s->t4_t6_rx.rx_skip_bits = 0;
s->t4_t6_rx.rx_bitstream = 0;
s->t4_t6_rx.consecutive_eols = EOLS_TO_END_ANY_RX_PAGE;
s->image_size = 0;
return 0;
}
