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-rw-r--r--libass/ass.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/libass/ass.h b/libass/ass.h
index d911e99..e0160d6 100644
--- a/libass/ass.h
+++ b/libass/ass.h
@@ -22,6 +22,7 @@
#define LIBASS_ASS_H
#include <stdio.h>
+#include <stdarg.h>
#include "ass_types.h"
/// Libass renderer object. Contents are private.
@@ -69,6 +70,9 @@ void ass_set_style_overrides(ass_library_t *priv, char **list);
void ass_process_force_style(ass_track_t *track);
+void ass_set_message_cb(ass_library_t *priv,
+ void (*msg_cb)(int, char *, va_list *));
+
/**
* \brief initialize the renderer
* \param priv library handle