jp2c: Fail probe faster

wader · Apr 10, 2024 · 79992b3 · 79992b3
1 parent a3f5e29
commit 79992b3
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/format/jpeg/jp2c.go b/format/jpeg/jp2c.go
@@ -71,6 +71,10 @@ var jp2Markers = scalar.UintMap{
 }
 
 func jp2cDecode(d *decode.D) any {
+	if d.PeekUintBits(16) != JP2_SOC {
+		d.Fatalf("no SOC marker")
+	}
+
 	seenSOC := false
 	seenSIZ := false
 	seenEOC := false