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jpeg2000: fix for uninitialized data errors in valgrind/memcheck

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Nicolas Bertrand 2013-04-29 12:25:09 +02:00 committed by Michael Niedermayer
parent 108e2ae829
commit a06f0cef5b
1 changed files with 14 additions and 4 deletions
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18
libavcodec/jpeg2000dec.c
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@ -635,7 +635,14 @@ static int jpeg2000_decode_packet(Jpeg2000DecoderContext *s,
Jpeg2000Cblk *cblk = prec->cblk + cblkno;
if (s->buf_end - s->buf < cblk->lengthinc)
return AVERROR(EINVAL);
bytestream_get_buffer(&s->buf, cblk->data, cblk->lengthinc);
/* A code-block data can be empty. In that case initialize data
* with 0xffff. */
if (cblk->lengthinc > 0)
bytestream_get_buffer(&s->buf, cblk->data, cblk->lengthinc);
else {
cblk->data[0] = 0xff;
cblk->data[1] = 0xff;
}
cblk->length += cblk->lengthinc;
cblk->lengthinc = 0;
}
@ -853,12 +860,15 @@ static int decode_cblk(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *codsty,
{
int passno = cblk->npasses, pass_t = 2, bpno = cblk->nonzerobits - 1, y;
for (y = 0; y < height + 2; y++)
memset(t1->flags[y], 0, (width + 2) * sizeof(width));
for (y = 0; y < height; y++)
memset(t1->data[y], 0, width * sizeof(width));
/* If code-block contains no compressed data: nothing to do. */
if (cblk->length == 0)
return 0;
for (y = 0; y < height + 2; y++)
memset(t1->flags[y], 0, (width + 2) * sizeof(width));
ff_mqc_initdec(&t1->mqc, cblk->data);
cblk->data[cblk->length] = 0xff;
cblk->data[cblk->length + 1] = 0xff;