vo: dropping subtitle files on the VO window adds them as subtitle files

Note that we don't try to be clever about detecting the files as
subtitles: we just check the file extension. We could go all the way and
check the files by opening them with a demuxer, but that would probably
do more bad than good.

2 files changed, 9 insertions, 0 deletions

diff --git a/sub/find_subfiles.c b/sub/find_subfiles.c
index e5577c3912..5efbd20476 100644
--- a/sub/find_subfiles.c
+++ b/sub/find_subfiles.c
@@ -42,6 +42,11 @@ static struct bstr get_ext(struct bstr s)
     return bstr_splice(s, dotpos + 1, s.len);
 }
 
+bool mp_might_be_subtitle_file(const char *filename)
+{
+    return is_sub_ext(get_ext(bstr0(filename)));
+}
+
 static int compare_sub_filename(const void *a, const void *b)
 {
     const struct subfn *s1 = a;
diff --git a/sub/find_subfiles.h b/sub/find_subfiles.h
index d11c02627b..85b491f1f9 100644
--- a/sub/find_subfiles.h
+++ b/sub/find_subfiles.h
@@ -19,6 +19,8 @@
 #ifndef MPLAYER_FIND_SUBFILES_H
 #define MPLAYER_FIND_SUBFILES_H
 
+#include <stdbool.h>
+
 struct subfn {
     int priority;
     char *fname;
@@ -28,4 +30,6 @@ struct subfn {
 struct mpv_global;
 struct subfn *find_text_subtitles(struct mpv_global *global, const char *fname);
 
+bool mp_might_be_subtitle_file(const char *filename);
+
 #endif /* MPLAYER_FINDFILES_H */