ass_mp: add mp_ass_flush_old_events()

2 files changed, 15 insertions, 0 deletions

diff --git a/sub/ass_mp.c b/sub/ass_mp.c
index b30b9964de..8d40b5256a 100644
--- a/sub/ass_mp.c
+++ b/sub/ass_mp.c
@@ -163,3 +163,17 @@ ASS_Library *mp_ass_init(struct mpv_global *global, struct mp_log *log)
     talloc_free(path);
     return priv;
 }
+
+void mp_ass_flush_old_events(ASS_Track *track, long long ts)
+{
+    int n = 0;
+    for (; n < track->n_events; n++) {
+        if ((track->events[n].Start + track->events[n].Duration) >= ts)
+            break;
+        ass_free_event(track, n);
+        track->n_events--;
+    }
+    for (int i = 0; n > 0 && i < track->n_events; i++) {
+        track->events[i] = track->events[i+n];
+    }
+}
diff --git a/sub/ass_mp.h b/sub/ass_mp.h
index 98311824ab..789a53acb1 100644
--- a/sub/ass_mp.h
+++ b/sub/ass_mp.h
@@ -44,6 +44,7 @@ struct mpv_global;
 struct mp_osd_res;
 struct osd_style_opts;
 
+void mp_ass_flush_old_events(ASS_Track *track, long long ts);
 void mp_ass_set_style(ASS_Style *style, double res_y,
                       const struct osd_style_opts *opts);