jpegls: fix off limit

Fixes part of CID717913 Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
12 years ago · 4acfe3d193
parent 9f9307ff2a
commit 4acfe3d193
1 changed files with 1 additions and 1 deletions
--- a/libavcodec/jpeglsdec.c
+++ b/libavcodec/jpeglsdec.c
@ -295,7 +295,7 @@ int ff_jpegls_decode_picture(MJpegDecodeContext *s, int near, int point_transfor
    }
    if(ilv == 0) { /* separate planes */
        stride = (s->nb_components > 1) ? 3 : 1;
-        off = av_clip(s->cur_scan - 1, 0, stride);
+        off = av_clip(s->cur_scan - 1, 0, stride - 1);
        width = s->width * stride;
        cur += off;
        for(i = 0; i < s->height; i++) {