vlc_mutex_t subpicture_lock; /**< subpicture heap lock */
subpicture_t p_subpicture[VOUT_MAX_SUBPICTURES]; /**< subpictures */
int i_channel; /**< number of subpicture channels registered */
+ int64_t i_subpicture_order; /**< number of created subpicture since spu creation */
filter_t *p_blend; /**< alpha blending module */
filter_t *p_text; /**< text renderer module */