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/***************************************************************************** |
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* |
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* XVID MPEG-4 VIDEO CODEC |
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* - Global structures, constants - |
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* |
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* Copyright(C) 2002 Michael Militzer |
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* |
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* This program is an implementation of a part of one or more MPEG-4 |
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* Video tools as specified in ISO/IEC 14496-2 standard. Those intending |
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* to use this software module in hardware or software products are |
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* advised that its use may infringe existing patents or copyrights, and |
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* any such use would be at such party's own risk. The original |
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* developer of this software module and his/her company, and subsequent |
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* editors and their companies, will have no liability for use of this |
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* software or modifications or derivatives thereof. |
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* |
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* This program is free software ; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation ; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY ; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program ; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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* |
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* $Id: global.h,v 1.14 2002-09-04 21:59:27 edgomez Exp $ |
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* |
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****************************************************************************/ |
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#ifndef _GLOBAL_H_ |
#ifndef _GLOBAL_H_ |
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#define _GLOBAL_H_ |
#define _GLOBAL_H_ |
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#include "xvid.h" |
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#include "portab.h" |
#include "portab.h" |
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/* --- macroblock stuff --- */ |
/* --- macroblock modes --- */ |
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#define MODE_INTER 0 |
#define MODE_INTER 0 |
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#define MODE_INTER_Q 1 |
#define MODE_INTER_Q 1 |
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#define MODE_STUFFING 7 |
#define MODE_STUFFING 7 |
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#define MODE_NOT_CODED 16 |
#define MODE_NOT_CODED 16 |
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/* --- bframe specific --- */ |
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#define MODE_DIRECT 0 |
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#define MODE_INTERPOLATE 1 |
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#define MODE_BACKWARD 2 |
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#define MODE_FORWARD 3 |
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#define MODE_DIRECT_NONE_MV 4 |
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typedef struct |
typedef struct |
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{ |
{ |
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int x; |
uint32_t bufa; |
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int y; |
uint32_t bufb; |
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} VECTOR; |
uint32_t buf; |
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uint32_t pos; |
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uint32_t *tail; |
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uint32_t *start; |
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uint32_t length; |
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} |
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Bitstream; |
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#define MBPRED_SIZE 15 |
#define MBPRED_SIZE 15 |
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{ |
{ |
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// decoder/encoder |
// decoder/encoder |
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VECTOR mvs[4]; |
VECTOR mvs[4]; |
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uint32_t sad8[4]; // SAD values for inter4v-VECTORs |
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uint32_t sad16; // SAD value for inter-VECTOR |
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short int pred_values[6][MBPRED_SIZE]; |
short int pred_values[6][MBPRED_SIZE]; |
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int acpred_directions[6]; |
int acpred_directions[6]; |
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// encoder specific |
// encoder specific |
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VECTOR mv16; |
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VECTOR pmvs[4]; |
VECTOR pmvs[4]; |
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int32_t sad8[4]; // SAD values for inter4v-VECTORs |
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int32_t sad16; // SAD value for inter-VECTOR |
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int dquant; |
int dquant; |
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int cbp; |
int cbp; |
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} MACROBLOCK; |
// bframe stuff |
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static __inline int8_t get_dc_scaler(int32_t quant, uint32_t lum) |
VECTOR b_mvs[4]; |
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{ |
VECTOR b_pmvs[4]; |
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int8_t dc_scaler; |
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if(quant > 0 && quant < 5) { |
// bframe direct mode |
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dc_scaler = 8; |
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return dc_scaler; |
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} |
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if(quant < 25 && !lum) { |
VECTOR directmv[4]; |
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dc_scaler = (quant + 13) >> 1; |
VECTOR deltamv; |
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return dc_scaler; |
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} |
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if(quant < 9) { |
int mb_type; |
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dc_scaler = quant << 1; |
int dbquant; |
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return dc_scaler; |
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} |
// stuff for block based ME (needed for Qpel ME) |
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// backup of last integer ME vectors/sad |
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VECTOR i_mv16; |
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VECTOR i_mvs[4]; |
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int32_t i_sad8[4]; // SAD values for inter4v-VECTORs |
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int32_t i_sad16; // SAD value for inter-VECTOR |
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if(quant < 25) { |
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dc_scaler = quant + 8; |
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return dc_scaler; |
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} |
} |
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MACROBLOCK; |
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static __inline int8_t |
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get_dc_scaler(uint32_t quant, |
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uint32_t lum) |
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{ |
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if (quant < 5) |
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return 8; |
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if (quant < 25 && !lum) |
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return (quant + 13) / 2; |
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if (quant < 9) |
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return 2 * quant; |
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if (quant < 25) |
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return quant + 8; |
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if(lum) |
if(lum) |
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dc_scaler = (quant << 1) - 16; |
return 2 * quant - 16; |
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else |
else |
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dc_scaler = quant - 6; |
return quant - 6; |
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return dc_scaler; |
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} |
} |
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// useful macros |
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#define MIN(X, Y) ((X)<(Y)?(X):(Y)) |
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#define MAX(X, Y) ((X)>(Y)?(X):(Y)) |
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#define ABS(X) (((X)>0)?(X):-(X)) |
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#define SIGN(X) (((X)>0)?1:-1) |
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#endif /* _GLOBAL_H_ */ |
#endif /* _GLOBAL_H_ */ |