From d4d292434c430a780c9614c04578d0cf1b7d1fba Mon Sep 17 00:00:00 2001
From: kichikuou <KichikuouChrome@gmail.com>
Date: Sat, 7 Jan 2023 18:26:09 +0900
Subject: [PATCH] Add error checking for movie format

AliceSoft only uses MPEG-PS, but PlayMovie.dll is included in System4
SDK and can play any format supported by DirectShow. This fixes crash in
movie_load() when given file is not a MPEG-PS.
---
 src/movie.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/movie.c b/src/movie.c
index 800892d..42393fa 100644
--- a/src/movie.c
+++ b/src/movie.c
@@ -115,6 +115,12 @@ struct movie_context *movie_load(const char *filename)
 		movie_free(mc);
 		return NULL;
 	}
+	if (!plm_has_headers(mc->plm)) {
+		WARNING("%s: not a MPEG-PS file", path);
+		free(path);
+		movie_free(mc);
+		return NULL;
+	}
 	free(path);
 
 	if (!movie_shader.program)