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Code Issues Releases Activity

h261dec, ituh263dec: ensure CLOSE_READER is done on error paths, too.

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Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>
This commit is contained in:
Reimar Döffinger 2014-08-31 21:39:22 +02:00
parent 2a00812d82
commit 36c0043344
2 changed files with 4 additions and 2 deletions
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2
libavcodec/h261dec.c
View File

@ -310,6 +310,7 @@ static int h261_decode_block(H261Context *h, int16_t *block, int n, int coded)
UPDATE_CACHE(re, &s->gb);
GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TCOEFF_VLC_BITS, 2, 0);
if (run == 66 && level) {
CLOSE_READER(re, &s->gb);
av_log(s->avctx, AV_LOG_ERROR, "illegal ac vlc code at %dx%d\n",
s->mb_x, s->mb_y);
return -1;
@ -332,6 +333,7 @@ static int h261_decode_block(H261Context *h, int16_t *block, int n, int coded)
}
i += run;
if (i >= 64) {
CLOSE_READER(re, &s->gb);
av_log(s->avctx, AV_LOG_ERROR, "run overflow at %dx%d\n",
s->mb_x, s->mb_y);
return -1;

4
libavcodec/ituh263dec.c
View File

@ -486,6 +486,7 @@ retry:
UPDATE_CACHE(re, &s->gb);
GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
if (run == 66 && level){
CLOSE_READER(re, &s->gb);
av_log(s->avctx, AV_LOG_ERROR, "illegal ac vlc code at %dx%d\n", s->mb_x, s->mb_y);
return -1;
}
@ -531,6 +532,7 @@ retry:
}
i += run;
if (i >= 64){
CLOSE_READER(re, &s->gb);
// redo update without last flag, revert -1 offset
i = i - run + ((run-1)&63) + 1;
if (i < 64) {
@ -539,7 +541,6 @@ retry:
break;
}
if(s->alt_inter_vlc && rl == &ff_h263_rl_inter && !s->mb_intra){
CLOSE_READER(re, &s->gb);
//Looks like a hack but no, it's the way it is supposed to work ...
rl = &ff_rl_intra_aic;
i = 0;
@ -553,7 +554,6 @@ retry:
j = scan_table[i];
block[j] = level;
}
CLOSE_READER(re, &s->gb);
}
not_coded:
if (s->mb_intra && s->h263_aic) {