From 69e22e21e3aaf92bb4038646f18a3d64fb6b636e Mon Sep 17 00:00:00 2001
From: Paul B Mahol <onemda@gmail.com>
Date: Thu, 3 Sep 2020 17:50:45 +0200
Subject: [PATCH] avformat/musx: improve probing

---
 libavformat/musx.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/libavformat/musx.c b/libavformat/musx.c
index 8537eb7e72..9dd721182a 100644
--- a/libavformat/musx.c
+++ b/libavformat/musx.c
@@ -20,12 +20,23 @@
  */
 
 #include "libavutil/avassert.h"
+#include "libavutil/intreadwrite.h"
 #include "avformat.h"
 #include "internal.h"
 
 static int musx_probe(const AVProbeData *p)
 {
-    if (memcmp(p->buf, "MUSX", 4))
+    unsigned version;
+
+    if (AV_RB32(p->buf) != MKBETAG('M','U','S','X'))
+        return 0;
+
+    version = AV_RL32(p->buf + 8);
+    if (version != 10 &&
+        version != 6 &&
+        version != 5 &&
+        version != 4 &&
+        version != 201)
         return 0;
 
     return AVPROBE_SCORE_MAX / 5 * 2;