generic-library/ffmpeg
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Disable image flipping during JPEG decoding if CODEC_FLAG_EMU_EDGE is set

Browse Source 
instead of either aborting on the assert or crashing due to writing beyond
the array due to insufficient padding.

Originally committed as revision 20552 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Reimar Döffinger 2009-11-19 11:49:03 +00:00
parent 8a724ed84d
commit b711aaa2d8
1 changed files with 4 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
libavcodec/mjpegdec.c
View File

@ -770,6 +770,10 @@ static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah, i
uint8_t* data[MAX_COMPONENTS];
int linesize[MAX_COMPONENTS];
if(s->flipped && s->avctx->flags & CODEC_FLAG_EMU_EDGE) {
av_log(s->avctx, AV_LOG_ERROR, "Can not flip image with CODEC_FLAG_EMU_EDGE set!\n");
s->flipped = 0;
}
for(i=0; i < nb_components; i++) {
int c = s->comp_index[i];
data[c] = s->picture.data[c];
@ -777,7 +781,6 @@ static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah, i
s->coefs_finished[c] |= 1;
if(s->flipped) {
//picture should be flipped upside-down for this codec
assert(!(s->avctx->flags & CODEC_FLAG_EMU_EDGE));
data[c] += (linesize[c] * (s->v_scount[i] * (8 * s->mb_height -((s->height/s->v_max)&7)) - 1 ));
linesize[c] *= -1;
}