avformat/avlanguage: make av_convert_lang_to() internal

The header was never installed and the function is only used in libavformat

Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>

1 files changed, 9 insertions, 2 deletions

diff --git a/libavformat/avlanguage.c b/libavformat/avlanguage.c
index 39f2560d94..f5d2ddf304 100644
--- a/libavformat/avlanguage.c
+++ b/libavformat/avlanguage.c
@@ -733,7 +733,7 @@ static int lang_table_compare(const void *lhs, const void *rhs)
     return strcmp(lhs, ((const LangEntry *)rhs)->str);
 }
 
-const char *av_convert_lang_to(const char *lang, enum AVLangCodespace target_codespace)
+const char *ff_convert_lang_to(const char *lang, enum AVLangCodespace target_codespace)
 {
     int i;
     const LangEntry *entry = NULL;
@@ -759,7 +759,14 @@ const char *av_convert_lang_to(const char *lang, enum AVLangCodespace target_cod
             entry = lang_table + entry->next_equivalent;
 
     if (target_codespace == AV_LANG_ISO639_2_TERM)
-        return av_convert_lang_to(lang, AV_LANG_ISO639_2_BIBL);
+        return ff_convert_lang_to(lang, AV_LANG_ISO639_2_BIBL);
 
     return NULL;
 }
+
+#if LIBAVFORMAT_VERSION_MAJOR < 58
+const char *av_convert_lang_to(const char *lang, enum AVLangCodespace target_codespace)
+{
+    return ff_convert_lang_to(lang, target_codespace);
+}
+#endif