/*

 * This file is part of libbluray

 * Copyright (C) 2013  Petri Hintukainen <phintuka@users.sourceforge.net>

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2.1 of the License, or (at your option) any later version.

 *

 * This library is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with this library. If not, see

 * <http://www.gnu.org/licenses/>.

 */

#if !defined(_BD_RLE_H_)

#define _BD_RLE_H_

#include "overlay.h"

#include "util/attributes.h"

#include <stdint.h>

/*

 * encode state

 */

typedef struct {

    BD_PG_RLE_ELEM *elem;     /* current element */

    unsigned int    free_elem;/* unused element count */

    unsigned int    num_elem; /* allocated element count */

    int error;

} RLE_ENC;

/*

 *

 */

#include "util/refcnt.h"

#include "util/macro.h"

BD_PRIVATE BD_PG_RLE_ELEM *rle_crop_object(const BD_PG_RLE_ELEM *orig, int width,

                                           int crop_x, int crop_y, int crop_w, int crop_h);

static inline int rle_begin(RLE_ENC *p)

{

    p->num_elem = 1024;

    p->free_elem = 1024;

    p->elem = refcnt_realloc(NULL, p->num_elem * sizeof(BD_PG_RLE_ELEM));

    if (!p->elem) {

        return -1;

    }

    p->elem->len = 0;

    p->elem->color = 0xffff;

    p->error = 0;

    return 0;

}

static inline BD_PG_RLE_ELEM *rle_get(RLE_ENC *p)

{

    BD_PG_RLE_ELEM *start = (p->elem ? p->elem - (p->num_elem - p->free_elem) : NULL);

    if (p->error) {

        if (start) {

            bd_refcnt_dec(start);

            p->elem = NULL;

        }

        return NULL;

    }

    return start;

}

static inline void rle_end(RLE_ENC *p)

{

    BD_PG_RLE_ELEM *start = rle_get(p);

    if (start) {

        bd_refcnt_dec(start);

    }

    p->elem = NULL;

}

/*

 * compression

 */

BD_PRIVATE int rle_add_eol(RLE_ENC *p);

BD_PRIVATE int rle_add_bite(RLE_ENC *p, uint8_t color, int len);

BD_PRIVATE int rle_compress_chunk(RLE_ENC *p, const uint8_t *mem, unsigned width);

#endif /* _BD_RLE_H_ */