From f794ee028b875ce315aa2917d9f21db4b3973c3b Mon Sep 17 00:00:00 2001
From: Rubidium <rubidium@openttd.org>
Date: Fri, 14 Mar 2025 19:43:53 +0100
Subject: [PATCH] Codefix: potential division by zero in midi reader

---
 src/music/midifile.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/music/midifile.cpp b/src/music/midifile.cpp
index 9b23e15d59..e237f3b0cf 100644
--- a/src/music/midifile.cpp
+++ b/src/music/midifile.cpp
@@ -458,6 +458,8 @@ bool MidiFile::LoadFile(const std::string &filename)
 	if (header.format != 0 && header.format != 1) return false;
 	/* Doesn't support SMPTE timecode files */
 	if ((header.tickdiv & 0x8000) != 0) return false;
+	/* Ticks per beat / parts per quarter note should not be zero. */
+	if (header.tickdiv == 0) return false;
 
 	this->tickdiv = header.tickdiv;