avformat/sga: improve probing for valid files

Update variables depending on high four bits of first two bytes.
4 years ago · 498be38e32
parent c6c82428af
commit 498be38e32
1 changed files with 5 additions and 3 deletions
--- a/libavformat/sga.c
+++ b/libavformat/sga.c
@ -75,9 +75,11 @@ static int sga_probe(const AVProbeData *p)
        if (last_left < 0)
            return 0;
        if (sectors && header && last_left == 0) {
-            if (left <= 8)
-                return 0;
-            last_left = left;
+            if (header >> 12) {
+                last_left = left;
+            } else {
+                last_left = left = header;
+            }
        } else if (sectors && header) {
            left = header;
            last_left -= left;