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FAX T.6 decompression fixed for images with black in the last pixel of lines.

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Colour and grey images can down be dithered down to bi-level images for transmission as faxes.
More movement towards T.42 support
This commit is contained in:
Steve Underwood
2012-08-04 03:45:09 +08:00
parent e35221b981
commit e523076274
29 changed files with 916 additions and 446 deletions
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18
libs/spandsp/src/t4_t6_encode.c
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@@ -82,6 +82,7 @@
#include "spandsp/timezone.h"
#include "spandsp/t4_rx.h"
#include "spandsp/t4_tx.h"
#include "spandsp/image_translate.h"
#include "spandsp/t81_t82_arith_coding.h"
#include "spandsp/t85.h"
#if defined(SPANDSP_SUPPORT_T42)
@@ -104,6 +105,7 @@
#endif
#include "spandsp/private/t4_t6_decode.h"
#include "spandsp/private/t4_t6_encode.h"
#include "spandsp/private/image_translate.h"
#include "spandsp/private/t4_rx.h"
#include "spandsp/private/t4_tx.h"
@@ -544,6 +546,22 @@ static int row_to_run_lengths(uint32_t list[], const uint8_t row[], int width)
list[entry++] = pos;
}
}
#if defined(T4_STATE_DEBUGGING)
/* Dump the runs of black and white for analysis */
{
int prev;
int x;
printf("Runs (%d)", list[entry - 1]);
prev = 0;
for (x = 0; x < entry; x++)
{
printf(" %" PRIu32, list[x] - prev);
prev = list[x];
}
printf("\n");
}
#endif
return entry;
}
/*- End of function --------------------------------------------------------*/