/*
* 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_ */