mem.h

/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

#include "common/scummsys.h"

/* Common memory code used by the Indeo decoder
 *
 * Original copyright note: * Intel Indeo 4 (IV41, IV42, etc.) video decoder for ffmpeg
 * written, produced, and directed by Alan Smithee
 */

#ifndef IMAGE_CODECS_INDEO_MEM_H
#define IMAGE_CODECS_INDEO_MEM_H

namespace Image {
namespace Indeo {

#define FF_ARRAY_ELEMS(a) (sizeof(a) / sizeof((a)[0]))
#define FFALIGN(x, a) (((x) + (a)-1) & ~((a)-1))
#define FFSIGN(a) ((a) > 0 ? 1 : -1)
#define MAX_INTEGER 0x7ffffff

extern void avFreeP(void *arg);


extern void *avReallocF(void *ptr, size_t nelem, size_t elsize);

extern uint16 invertBits(uint16 val, int nbits);

extern uint32 bitswap32(uint32 x);

inline uint8 avClipUint8(int a) {
    if (a & (~0xFF))
        return (-a) >> 31;
    else
        return a;
}

inline unsigned avClipUintp2(int a, int p) {
    if (a & ~((1 << p) - 1))
        return -a >> 31 & ((1 << p) - 1);
    else
        return  a;
}

extern const uint8 ffZigZagDirect[64];

} // End of namespace Indeo
} // End of namespace Image

#endif