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* XVID MPEG-4 VIDEO CODEC |
* XVID MPEG-4 VIDEO CODEC |
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* - Global structures, constants - |
* - Global structures, constants - |
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* |
* |
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* Copyright(C) 2002 Michael Militzer |
* Copyright(C) 2002 Michael Militzer <isibaar@xvid.org> |
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* |
* |
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* This program is an implementation of a part of one or more MPEG-4 |
* This file is part of XviD, a free MPEG-4 video encoder/decoder |
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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 |
* XviD is free software; you can redistribute it and/or modify it |
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* it under the terms of the GNU General Public License as published by |
* 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 |
* the Free Software Foundation ; either version 2 of the License, or |
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* (at your option) any later version. |
* (at your option) any later version. |
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* |
* |
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* along with this program ; if not, write to the Free Software |
* 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 |
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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* |
* |
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* Under section 8 of the GNU General Public License, the copyright |
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* holders of XVID explicitly forbid distribution in the following |
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* countries: |
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* |
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* - Japan |
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* - United States of America |
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* |
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* Linking XviD statically or dynamically with other modules is making a |
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* combined work based on XviD. Thus, the terms and conditions of the |
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* GNU General Public License cover the whole combination. |
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* |
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* As a special exception, the copyright holders of XviD give you |
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* permission to link XviD with independent modules that communicate with |
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* XviD solely through the VFW1.1 and DShow interfaces, regardless of the |
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* license terms of these independent modules, and to copy and distribute |
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* the resulting combined work under terms of your choice, provided that |
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* every copy of the combined work is accompanied by a complete copy of |
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* the source code of XviD (the version of XviD used to produce the |
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* combined work), being distributed under the terms of the GNU General |
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* Public License plus this exception. An independent module is a module |
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* which is not derived from or based on XviD. |
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* |
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* Note that people who make modified versions of XviD are not obligated |
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* to grant this special exception for their modified versions; it is |
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* their choice whether to do so. The GNU General Public License gives |
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* permission to release a modified version without this exception; this |
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* exception also makes it possible to release a modified version which |
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* carries forward this exception. |
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* |
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* $Id$ |
* $Id$ |
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* |
* |
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****************************************************************************/ |
****************************************************************************/ |
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uint32_t *tail; |
uint32_t *tail; |
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uint32_t *start; |
uint32_t *start; |
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uint32_t length; |
uint32_t length; |
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uint32_t initpos; |
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} |
} |
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Bitstream; |
Bitstream; |
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typedef struct |
typedef struct |
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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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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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int mode; |
int mode; |
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int quant; // absolute quant |
int quant; /* absolute quant */ |
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int field_dct; |
int field_dct; |
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int field_pred; |
int field_pred; |
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int field_for_top; |
int field_for_top; |
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int field_for_bot; |
int field_for_bot; |
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// encoder specific |
/* encoder specific */ |
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VECTOR mv16; |
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 |
int32_t sad8[4]; /* SAD values for inter4v-VECTORs */ |
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int32_t sad16; // SAD value for inter-VECTOR |
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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// bframe stuff |
/* bframe stuff */ |
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VECTOR b_mvs[4]; |
VECTOR b_mvs[4]; |
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VECTOR b_pmvs[4]; |
VECTOR b_pmvs[4]; |
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// bframe direct mode |
/* bframe direct mode */ |
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VECTOR directmv[4]; |
VECTOR directmv[4]; |
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VECTOR deltamv; |
VECTOR deltamv; |
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int mb_type; |
int mb_type; |
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int dbquant; |
int dbquant; |
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// stuff for block based ME (needed for Qpel ME) |
/* stuff for block based ME (needed for Qpel ME) */ |
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// backup of last integer ME vectors/sad |
/* backup of last integer ME vectors/sad */ |
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VECTOR i_mv16; |
VECTOR i_mv16; |
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VECTOR i_mvs[4]; |
VECTOR i_mvs[4]; |
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int32_t i_sad8[4]; // SAD values for inter4v-VECTORs |
int32_t i_sad8[4]; /* SAD values for inter4v-VECTORs */ |
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int32_t i_sad16; // SAD value for inter-VECTOR |
int32_t i_sad16; /* SAD value for inter-VECTOR */ |
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} |
} |
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MACROBLOCK; |
MACROBLOCK; |
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return 8; |
return 8; |
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if (quant < 25 && !lum) |
if (quant < 25 && !lum) |
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return (quant + 13) / 2; |
return (int8_t)((quant + 13) / 2); |
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if (quant < 9) |
if (quant < 9) |
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return 2 * quant; |
return (int8_t)(2 * quant); |
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if (quant < 25) |
if (quant < 25) |
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return quant + 8; |
return (int8_t)(quant + 8); |
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if (lum) |
if (lum) |
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return 2 * quant - 16; |
return (int8_t)(2 * quant - 16); |
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else |
else |
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return quant - 6; |
return (int8_t)(quant - 6); |
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} |
} |
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// useful macros |
/* useful macros */ |
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#define MIN(X, Y) ((X)<(Y)?(X):(Y)) |
#define MIN(X, Y) ((X)<(Y)?(X):(Y)) |
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#define MAX(X, Y) ((X)>(Y)?(X):(Y)) |
#define MAX(X, Y) ((X)>(Y)?(X):(Y)) |