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Revision **971** -
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*Fri Apr 4 22:12:07 2003 UTC*
(21 years, 5 months ago)
by *edgomez*

File size: 4685 byte(s)

File size: 4685 byte(s)

Fixes 32 bit misaligned reads on ARM

/***************************************************************************** * * XVID MPEG-4 VIDEO CODEC * - Global structures, constants - * * Copyright(C) 2002 Michael Militzer <isibaar@xvid.org> * * 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_ */

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