From 79992b341a1f787ac6456683d49fca336b598824 Mon Sep 17 00:00:00 2001
From: Mattias Wadman <mattias.wadman@gmail.com>
Date: Wed, 10 Apr 2024 23:54:22 +0200
Subject: [PATCH] jp2c: Fail probe faster

---
 format/jpeg/jp2c.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/format/jpeg/jp2c.go b/format/jpeg/jp2c.go
index b13400e2..d8bd544e 100644
--- 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