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/************************************************************************** |
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* |
* |
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* XVID MPEG-4 VIDEO CODEC |
* XVID MPEG-4 VIDEO CODEC |
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* sum of absolute difference |
* - SAD calculation module (C part) - |
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* |
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* Copyright(C) 2002 Michael Militzer |
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* Copyright(C) 2002 Pete Ross |
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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 |
* 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 |
* it under the terms of the GNU General Public License as published by |
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* |
* |
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* You should have received a copy of the GNU General Public License |
* 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 |
* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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*************************************************************************/ |
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/************************************************************************** |
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* History: |
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* 14.02.2002 added sad16bi_c() |
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* 10.11.2001 initial version; (c)2001 peter ross <pross@cs.rmit.edu.au> |
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* |
* |
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*************************************************************************/ |
****************************************************************************/ |
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#include "../portab.h" |
#include "../portab.h" |
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#include "sad.h" |
#include "sad.h" |
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#define ABS(X) (((X)>0)?(X):-(X)) |
#define ABS(X) (((X)>0)?(X):-(X)) |
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#define MRSAD16_CORRFACTOR 8 |
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uint32_t |
uint32_t |
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sad8FuncPtr sad8; |
mrsad16_c(const uint8_t * const cur, |
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const uint8_t * const ref, |
const uint8_t * const ref, |
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const uint32_t stride, |
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const uint32_t best_sad) |
const uint32_t best_sad) |
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{ |
{ |
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{ |
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uint32_t sad = 0; |
uint32_t sad = 0; |
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uint32_t i, j; |
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uint8_t const *ptr_cur = cur; |
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uint8_t const *ptr_ref1 = ref1; |
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uint8_t const *ptr_ref2 = ref2; |
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for (j = 0; j < 8; j++) { |
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for (i = 0; i < 8; i++) { |
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int pixel = (ptr_ref1[i] + ptr_ref2[i] + 1) / 2; |
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if (pixel < 0) { |
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pixel = 0; |
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} else if (pixel > 255) { |
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pixel = 255; |
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} |
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sad += ABS(ptr_cur[i] - pixel); |
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} |
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ptr_cur += stride; |
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ptr_ref1 += stride; |
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ptr_ref2 += stride; |
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} |
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return sad; |
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} |
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uint32_t |
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sad8_c(const uint8_t * const cur, |
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const uint8_t * const ref, |
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const uint32_t stride) |
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{ |
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uint32_t sad = 0; |
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uint32_t i, j; |
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uint8_t const *ptr_cur = cur; |
uint8_t const *ptr_cur = cur; |
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uint8_t const *ptr_ref = ref; |
uint8_t const *ptr_ref = ref; |
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