sub: destroy/recreate ASS_Renderer when disabling/enablings subs

Keeping ASS_Renderers around for a potentially large number of subtitle
tracks could lead to excessive memory usage, especially since the libass
cache is broken (caches even unneeded data), and might consume up to
~500MB of memory for no reason.

1 files changed, 8 insertions, 0 deletions

diff --git a/sub/dec_sub.c b/sub/dec_sub.c
index 0449fe8d05..a1f72d432b 100644
--- a/sub/dec_sub.c
+++ b/sub/dec_sub.c
@@ -301,6 +301,14 @@ void sub_reset(struct dec_sub *sub)
     pthread_mutex_unlock(&sub->lock);
 }
 
+void sub_select(struct dec_sub *sub, bool selected)
+{
+    pthread_mutex_lock(&sub->lock);
+    if (sub->sd && sub->sd->driver->select)
+        sub->sd->driver->select(sub->sd, selected);
+    pthread_mutex_unlock(&sub->lock);
+}
+
 int sub_control(struct dec_sub *sub, enum sd_ctrl cmd, void *arg)
 {
     int r = CONTROL_UNKNOWN;