X-Git-Url: https://git.piment-noir.org/?p=deb_ffmpeg.git;a=blobdiff_plain;f=ffmpeg%2Flibavformat%2Fmtv.c;h=addad244404a5c0ccd6f0404dc7b405c2c88ced7;hp=1d5f26673aa1cad02dcc98024d620500e5b37282;hb=f6fa7814ccfe3e76514b36cf04f5cd3cb657c8cf;hpb=2ba45a602cbfa7b771effba9b11bb4245c21bc00

diff --git a/ffmpeg/libavformat/mtv.c b/ffmpeg/libavformat/mtv.c
index 1d5f266..addad24 100644
--- a/ffmpeg/libavformat/mtv.c
+++ b/ffmpeg/libavformat/mtv.c
@@ -112,7 +112,7 @@ static int mtv_read_header(AVFormatContext *s)
     mtv->audio_identifier  = avio_rl24(pb);
     mtv->audio_br          = avio_rl16(pb);
     mtv->img_colorfmt      = avio_rl24(pb);
-    mtv->img_bpp           = avio_r8(pb)>>3;
+    mtv->img_bpp           = avio_r8(pb);
     mtv->img_width         = avio_rl16(pb);
     mtv->img_height        = avio_rl16(pb);
     mtv->img_segment_size  = avio_rl16(pb);
@@ -128,17 +128,17 @@ static int mtv_read_header(AVFormatContext *s)
 
     /* Calculate width and height if missing from header */
 
-    if(!mtv->img_width && mtv->img_height)
-        mtv->img_width=mtv->img_segment_size / (mtv->img_bpp)
+    if (!mtv->img_width && mtv->img_height > 0 && mtv->img_bpp >= 8)
+        mtv->img_width=mtv->img_segment_size / (mtv->img_bpp>>3)
                         / mtv->img_height;
 
-    if(!mtv->img_height && mtv->img_width)
-        mtv->img_height=mtv->img_segment_size / (mtv->img_bpp)
+    if (!mtv->img_height && mtv->img_width > 0 && mtv->img_bpp >= 8)
+        mtv->img_height=mtv->img_segment_size / (mtv->img_bpp>>3)
                         / mtv->img_width;
 
     if(!mtv->img_height || !mtv->img_width || !mtv->img_segment_size){
         av_log(s, AV_LOG_ERROR, "width or height or segment_size is invalid and I cannot calculate them from other information\n");
-        return AVERROR(EINVAL);
+        return AVERROR_INVALIDDATA;
     }
 
     avio_skip(pb, 4);