/*****************************************************************************
*
* XVID MPEG-4 VIDEO CODEC
* - Global structures, constants -
*
* Copyright(C) 2002 Michael Militzer
*
* This file is part of XviD, a free MPEG-4 video encoder/decoder
*
* XviD 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 2 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Under section 8 of the GNU General Public License, the copyright
* holders of XVID explicitly forbid distribution in the following
* countries:
*
* - Japan
* - United States of America
*
* Linking XviD statically or dynamically with other modules is making a
* combined work based on XviD. Thus, the terms and conditions of the
* GNU General Public License cover the whole combination.
*
* As a special exception, the copyright holders of XviD give you
* permission to link XviD with independent modules that communicate with
* XviD solely through the VFW1.1 and DShow interfaces, regardless of the
* license terms of these independent modules, and to copy and distribute
* the resulting combined work under terms of your choice, provided that
* every copy of the combined work is accompanied by a complete copy of
* the source code of XviD (the version of XviD used to produce the
* combined work), being distributed under the terms of the GNU General
* Public License plus this exception. An independent module is a module
* which is not derived from or based on XviD.
*
* Note that people who make modified versions of XviD are not obligated
* to grant this special exception for their modified versions; it is
* their choice whether to do so. The GNU General Public License gives
* permission to release a modified version without this exception; this
* exception also makes it possible to release a modified version which
* carries forward this exception.
*
* $Id: global.h,v 1.18.2.1 2003/04/04 22:12:07 edgomez Exp $
*
****************************************************************************/
#ifndef _GLOBAL_H_
#define _GLOBAL_H_
#include "xvid.h"
#include "portab.h"
/* --- macroblock modes --- */
#define MODE_INTER 0
#define MODE_INTER_Q 1
#define MODE_INTER4V 2
#define MODE_INTRA 3
#define MODE_INTRA_Q 4
#define MODE_STUFFING 7
#define MODE_NOT_CODED 16
/* --- bframe specific --- */
#define MODE_DIRECT 0
#define MODE_INTERPOLATE 1
#define MODE_BACKWARD 2
#define MODE_FORWARD 3
#define MODE_DIRECT_NONE_MV 4
typedef struct
{
uint32_t bufa;
uint32_t bufb;
uint32_t buf;
uint32_t pos;
uint32_t *tail;
uint32_t *start;
uint32_t length;
uint32_t initpos;
}
Bitstream;
#define MBPRED_SIZE 15
typedef struct
{
/* decoder/encoder */
VECTOR mvs[4];
short int pred_values[6][MBPRED_SIZE];
int acpred_directions[6];
int mode;
int quant; /* absolute quant */
int field_dct;
int field_pred;
int field_for_top;
int field_for_bot;
/* encoder specific */
VECTOR mv16;
VECTOR pmvs[4];
int32_t sad8[4]; /* SAD values for inter4v-VECTORs */
int32_t sad16; /* SAD value for inter-VECTOR */
int dquant;
int cbp;
/* bframe stuff */
VECTOR b_mvs[4];
VECTOR b_pmvs[4];
/* bframe direct mode */
VECTOR directmv[4];
VECTOR deltamv;
int mb_type;
int dbquant;
/* stuff for block based ME (needed for Qpel ME) */
/* backup of last integer ME vectors/sad */
VECTOR i_mv16;
VECTOR i_mvs[4];
int32_t i_sad8[4]; /* SAD values for inter4v-VECTORs */
int32_t i_sad16; /* SAD value for inter-VECTOR */
}
MACROBLOCK;
static __inline int8_t
get_dc_scaler(uint32_t quant,
uint32_t lum)
{
if (quant < 5)
return 8;
if (quant < 25 && !lum)
return (int8_t)((quant + 13) / 2);
if (quant < 9)
return (int8_t)(2 * quant);
if (quant < 25)
return (int8_t)(quant + 8);
if (lum)
return (int8_t)(2 * quant - 16);
else
return (int8_t)(quant - 6);
}
/* useful macros */
#define MIN(X, Y) ((X)<(Y)?(X):(Y))
#define MAX(X, Y) ((X)>(Y)?(X):(Y))
#define ABS(X) (((X)>0)?(X):-(X))
#define SIGN(X) (((X)>0)?1:-1)
#endif /* _GLOBAL_H_ */