1 files changed, 36 insertions, 0 deletions
diff --git a/video/filter/refqueue.h b/video/filter/refqueue.h
new file mode 100644
index 0000000000..ef23bee906
--- /dev/null
+++ b/video/filter/refqueue.h
@@ -0,0 +1,36 @@
+#ifndef MP_REFQUEUE_H_
+#define MP_REFQUEUE_H_
+
+#include <stdbool.h>
+
+// A helper for deinterlacers which require past/future reference frames.
+
+struct mp_refqueue;
+
+struct mp_refqueue *mp_refqueue_alloc(void);
+void mp_refqueue_free(struct mp_refqueue *q);
+
+void mp_refqueue_set_refs(struct mp_refqueue *q, int past, int future);
+void mp_refqueue_flush(struct mp_refqueue *q);
+void mp_refqueue_add_input(struct mp_refqueue *q, struct mp_image *img);
+bool mp_refqueue_need_input(struct mp_refqueue *q);
+bool mp_refqueue_has_output(struct mp_refqueue *q);
+void mp_refqueue_next(struct mp_refqueue *q);
+void mp_refqueue_next_field(struct mp_refqueue *q);
+struct mp_image *mp_refqueue_get(struct mp_refqueue *q, int pos);
+
+enum {
+    MP_MODE_DEINT = (1 << 0),           // deinterlacing enabled
+    MP_MODE_OUTPUT_FIELDS = (1 << 1),   // output fields separately
+    MP_MODE_INTERLACED_ONLY = (1 << 2), // only deinterlace marked frames
+};
+
+void mp_refqueue_set_mode(struct mp_refqueue *q, int flags);
+bool mp_refqueue_should_deint(struct mp_refqueue *q);
+bool mp_refqueue_is_interlaced(struct mp_refqueue *q);
+bool mp_refqueue_is_top_field(struct mp_refqueue *q);
+bool mp_refqueue_top_field_first(struct mp_refqueue *q);
+bool mp_refqueue_is_second_field(struct mp_refqueue *q);
+struct mp_image *mp_refqueue_get_field(struct mp_refqueue *q, int pos);
+
+#endif