RepoMirrors/ffmpeg
1
0
Fork 0
mirror of https://git.ffmpeg.org/ffmpeg.git synced 2025-02-17 12:27:18 +00:00
Code Issues Projects Releases Wiki Activity

jpeg2000: Fix uninitialized data errors pointed out by valgrind/memcheck

Browse Source 
Signed-off-by: Diego Biurrun <diego@biurrun.de>
This commit is contained in:
Nicolas Bertrand 2013-04-30 11:09:55 +02:00 committed by Diego Biurrun
parent 110796739a
commit 28816f9db8
1 changed files with 13 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
libavcodec/jpeg2000dec.c
View File

@ -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);
/* 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;
}
@ -853,11 +860,13 @@ 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)
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;