if (level == 127) {
break;
} else if (level != 0) {
- i += run;
+ i += run;
+ if (i > 63) {
+ av_log(a->avctx, AV_LOG_ERROR,
+ "ac-tex damaged at %d %d\n", a->mb_x, a->mb_y);
+ return AVERROR_INVALIDDATA;
+ }
j = scantable[i];
level = (level * qscale * quant_matrix[j]) >> 3;
level = (level ^ SHOW_SBITS(re, &a->gb, 1)) - SHOW_SBITS(re, &a->gb, 1);
run = SHOW_UBITS(re, &a->gb, 6)+1; LAST_SKIP_BITS(re, &a->gb, 6);
UPDATE_CACHE(re, &a->gb);
level = SHOW_SBITS(re, &a->gb, 10); SKIP_BITS(re, &a->gb, 10);
- i += run;
- j = scantable[i];
+ i += run;
+ if (i > 63) {
+ av_log(a->avctx, AV_LOG_ERROR,
+ "ac-tex damaged at %d %d\n", a->mb_x, a->mb_y);
+ return AVERROR_INVALIDDATA;
+ }
+ j = scantable[i];
if (level < 0) {
level = -level;
level = (level * qscale * quant_matrix[j]) >> 3;
level = (level - 1) | 1;
}
}
- if (i > 63) {
- av_log(a->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", a->mb_x, a->mb_y);
- return AVERROR_INVALIDDATA;
- }
block[j] = level;
}