lavc/movtextdec: make sure default font name is set

[ffmpeg] / libavcodec / ituh263dec.c

diff --git a/libavcodec/ituh263dec.c b/libavcodec/ituh263dec.c
index afc786bd8b2e55b42b25eed3a77fdb420b722567..c1005b0994ff6860132943488388be6c5f782ad0 100644 (file)
--- a/libavcodec/ituh263dec.c
+++ b/libavcodec/ituh263dec.c
@@ -222,7 +222,7 @@ int ff_h263_resync(MpegEncContext *s){
             get_bits(&s->gb, 8);
         }
 
-        if (show_bits_long(&s->gb, 32) == SLICE_START_CODE)
+        if (get_bits_left(&s->gb) >= 32 && show_bits_long(&s->gb, 32) == SLICE_START_CODE)
             return get_bits_count(&s->gb);
         else
             return -1;
@@ -1218,6 +1218,11 @@ int ff_h263_decode_picture_header(MpegEncContext *s)
     if ((ret = av_image_check_size(s->width, s->height, 0, s)) < 0)
         return ret;
 
+    if (!(s->avctx->flags2 & AV_CODEC_FLAG2_CHUNKS)) {
+        if ((s->width * s->height / 256 / 8) > get_bits_left(&s->gb))
+            return AVERROR_INVALIDDATA;
+    }
+
     s->mb_width = (s->width  + 15) / 16;
     s->mb_height = (s->height  + 15) / 16;
     s->mb_num = s->mb_width * s->mb_height;