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imgutils: initialize palette padding bytes in av_image_alloc

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av_image_fill_pointers always aligns the palette, but the padding
bytes don't (and can't) get initialized in av_image_copy.

Thus initialize them in av_image_alloc.

This fixes 'Syscall param write(buf) points to uninitialised byte(s)'
valgrind warnings.

Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Andreas Cadhalpun
2015-05-12 21:45:42 +02:00
committed by Michael Niedermayer
parent a7c0c79333
commit 51f6455285
1 changed files with 8 additions and 0 deletions
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8
libavutil/imgutils.c
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@@ -219,6 +219,14 @@ int av_image_alloc(uint8_t *pointers[4], int linesizes[4],
if (desc->flags & AV_PIX_FMT_FLAG_PAL || desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL)
avpriv_set_systematic_pal2((uint32_t*)pointers[1], pix_fmt);
if ((desc->flags & AV_PIX_FMT_FLAG_PAL ||
desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL) &&
pointers[1] - pointers[0] > linesizes[0] * h) {
/* zero-initialize the padding before the palette */
memset(pointers[0] + linesizes[0] * h, 0,
pointers[1] - pointers[0] - linesizes[0] * h);
}
return ret;
}