#ifndef MP_REFQUEUE_H_
#define MP_REFQUEUE_H_

#include <stdbool.h>

#include "filters/filter.h"

// A helper for deinterlacers which require past/future reference frames.

struct mp_refqueue;

struct mp_refqueue *mp_refqueue_alloc(struct mp_filter *f);

void mp_refqueue_add_in_format(struct mp_refqueue *q, int fmt, int subfmt);

void mp_refqueue_set_refs(struct mp_refqueue *q, int past, int future);
void mp_refqueue_flush(struct mp_refqueue *q);
struct mp_image *mp_refqueue_get(struct mp_refqueue *q, int pos);

struct mp_image *mp_refqueue_execute_reinit(struct mp_refqueue *q);
bool mp_refqueue_can_output(struct mp_refqueue *q);
void mp_refqueue_write_out_pin(struct mp_refqueue *q, struct mp_image *mpi);

struct mp_image *mp_refqueue_get_format(struct mp_refqueue *q);

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
};

#define MP_FIELD_PARITY_AUTO -1
#define MP_FIELD_PARITY_TFF 0
#define MP_FIELD_PARITY_BFF 1

void mp_refqueue_set_mode(struct mp_refqueue *q, int flags);
void mp_refqueue_set_parity(struct mp_refqueue *q, int parity);
bool mp_refqueue_should_deint(struct mp_refqueue *q);
bool mp_refqueue_output_fields(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
