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* XVID MPEG-4 VIDEO CODEC |
* XVID MPEG-4 VIDEO CODEC |
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* - MB prediction header file - |
* - MB prediction header file - |
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* |
* |
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* Copyright(C) 2002 Christoph Lampert <gruel@web.de> |
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* 2002 Peter Ross <pross@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 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 |
* 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 |
* to use this software module in hardware or software products are |
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* along with this program; if not, write to the xvid_free Software |
* along with this program; if not, write to the xvid_free Software |
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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* |
* |
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* $Id: mbprediction.h,v 1.13 2002-07-10 19:17:49 chl Exp $ |
* $Id: mbprediction.h,v 1.16 2002-10-19 12:20:33 edgomez Exp $ |
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* |
* |
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*************************************************************************/ |
*************************************************************************/ |
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/****************************************************************************** |
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* * |
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* Revision history: * |
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* * |
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* 29.06.2002 get_pmvdata() bounding * |
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* * |
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******************************************************************************/ |
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#ifndef _MBPREDICTION_H_ |
#ifndef _MBPREDICTION_H_ |
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#define _MBPREDICTION_H_ |
#define _MBPREDICTION_H_ |
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48 |
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49 |
#define MVequal(A,B) ( ((A).x)==((B).x) && ((A).y)==((B).y) ) |
#define MVequal(A,B) ( ((A).x)==((B).x) && ((A).y)==((B).y) ) |
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/***************************************************************************** |
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* Prototypes |
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****************************************************************************/ |
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void MBPrediction(FRAMEINFO * frame, /* <-- The parameter for ACDC and MV prediction */ |
void MBPrediction(FRAMEINFO * frame, /* <-- The parameter for ACDC and MV prediction */ |
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uint32_t x_pos, /* <-- The x position of the MB to be searched */ |
uint32_t x_pos, /* <-- The x position of the MB to be searched */ |
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const int bound); |
const int bound); |
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#ifdef OLD_GETPMV |
/***************************************************************************** |
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/* get_pmvdata returns the median predictor and nothing else */ |
* Inlined functions |
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****************************************************************************/ |
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static __inline VECTOR |
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get_pmv(const MACROBLOCK * const pMBs, |
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const uint32_t x, |
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const uint32_t y, |
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const uint32_t x_dim, |
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const uint32_t block) |
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{ |
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int xin1, xin2, xin3; |
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int yin1, yin2, yin3; |
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int vec1, vec2, vec3; |
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VECTOR lneigh, tneigh, trneigh; /* left neighbour, top neighbour, topright neighbour */ |
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VECTOR median; |
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static VECTOR zeroMV = { 0, 0 }; |
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uint32_t index = x + y * x_dim; |
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/* first row (special case) */ |
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if (y == 0 && (block == 0 || block == 1)) { |
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if ((x == 0) && (block == 0)) // first column, first block |
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{ |
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return zeroMV; |
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} |
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if (block == 1) // second block; has only a left neighbour |
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{ |
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return pMBs[index].mvs[0]; |
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} else { /* block==0, but x!=0, so again, there is a left neighbour */ |
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return pMBs[index - 1].mvs[1]; |
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} |
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} |
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/* |
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* MODE_INTER, vm18 page 48 |
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* MODE_INTER4V vm18 page 51 |
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* |
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* (x,y-1) (x+1,y-1) |
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* [ | ] [ | ] |
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* [ 2 | 3 ] [ 2 | ] |
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* |
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* (x-1,y) (x,y) (x+1,y) |
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* [ | 1 ] [ 0 | 1 ] [ 0 | ] |
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* [ | 3 ] [ 2 | 3 ] [ | ] |
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*/ |
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switch (block) { |
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case 0: |
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xin1 = x - 1; |
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yin1 = y; |
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vec1 = 1; /* left */ |
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xin2 = x; |
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yin2 = y - 1; |
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vec2 = 2; /* top */ |
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xin3 = x + 1; |
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yin3 = y - 1; |
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vec3 = 2; /* top right */ |
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break; |
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case 1: |
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xin1 = x; |
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yin1 = y; |
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vec1 = 0; |
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xin2 = x; |
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yin2 = y - 1; |
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vec2 = 3; |
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xin3 = x + 1; |
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yin3 = y - 1; |
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vec3 = 2; |
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break; |
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case 2: |
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xin1 = x - 1; |
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yin1 = y; |
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vec1 = 3; |
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xin2 = x; |
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yin2 = y; |
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vec2 = 0; |
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xin3 = x; |
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yin3 = y; |
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vec3 = 1; |
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break; |
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default: |
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xin1 = x; |
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yin1 = y; |
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vec1 = 2; |
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xin2 = x; |
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yin2 = y; |
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vec2 = 0; |
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xin3 = x; |
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yin3 = y; |
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vec3 = 1; |
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} |
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if (xin1 < 0 || /* yin1 < 0 || */ xin1 >= (int32_t) x_dim) { |
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lneigh = zeroMV; |
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} else { |
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lneigh = pMBs[xin1 + yin1 * x_dim].mvs[vec1]; |
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} |
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if (xin2 < 0 || /* yin2 < 0 || */ xin2 >= (int32_t) x_dim) { |
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tneigh = zeroMV; |
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} else { |
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tneigh = pMBs[xin2 + yin2 * x_dim].mvs[vec2]; |
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} |
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if (xin3 < 0 || /* yin3 < 0 || */ xin3 >= (int32_t) x_dim) { |
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trneigh = zeroMV; |
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} else { |
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trneigh = pMBs[xin3 + yin3 * x_dim].mvs[vec3]; |
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} |
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/* median,minimum */ |
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median.x = |
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MIN(MAX(lneigh.x, tneigh.x), |
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MIN(MAX(tneigh.x, trneigh.x), MAX(lneigh.x, trneigh.x))); |
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median.y = |
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MIN(MAX(lneigh.y, tneigh.y), |
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MIN(MAX(tneigh.y, trneigh.y), MAX(lneigh.y, trneigh.y))); |
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return median; |
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} |
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/* This is somehow a copy of get_pmv, but returning all MVs and Minimum SAD |
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instead of only Median MV */ |
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static __inline int |
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get_pmvdata(const MACROBLOCK * const pMBs, |
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const uint32_t x, |
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const uint32_t y, |
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const uint32_t x_dim, |
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const uint32_t block, |
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VECTOR * const pmv, |
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int32_t * const psad) |
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{ |
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/* |
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* pmv are filled with: |
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* [0]: Median (or whatever is correct in a special case) |
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* [1]: left neighbour |
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* [2]: top neighbour |
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* [3]: topright neighbour |
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* psad are filled with: |
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* [0]: minimum of [1] to [3] |
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* [1]: left neighbour's SAD (NB:[1] to [3] are actually not needed) |
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* [2]: top neighbour's SAD |
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* [3]: topright neighbour's SAD |
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*/ |
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int xin1, xin2, xin3; |
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int yin1, yin2, yin3; |
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int vec1, vec2, vec3; |
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uint32_t index = x + y * x_dim; |
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const VECTOR zeroMV = { 0, 0 }; |
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// first row of blocks (special case) |
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if (y == 0 && (block == 0 || block == 1)) { |
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if ((x == 0) && (block == 0)) // first column, first block |
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{ |
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pmv[0] = pmv[1] = pmv[2] = pmv[3] = zeroMV; |
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psad[0] = 0; |
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psad[1] = psad[2] = psad[3] = MV_MAX_ERROR; |
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return 0; |
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} |
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if (block == 1) // second block; has only a left neighbour |
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{ |
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pmv[0] = pmv[1] = pMBs[index].mvs[0]; |
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pmv[2] = pmv[3] = zeroMV; |
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psad[0] = psad[1] = pMBs[index].sad8[0]; |
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psad[2] = psad[3] = MV_MAX_ERROR; |
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return 0; |
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} else { /* block==0, but x!=0, so again, there is a left neighbour */ |
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pmv[0] = pmv[1] = pMBs[index - 1].mvs[1]; |
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pmv[2] = pmv[3] = zeroMV; |
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psad[0] = psad[1] = pMBs[index - 1].sad8[1]; |
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psad[2] = psad[3] = MV_MAX_ERROR; |
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return 0; |
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} |
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} |
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/* |
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* MODE_INTER, vm18 page 48 |
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* MODE_INTER4V vm18 page 51 |
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* |
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* (x,y-1) (x+1,y-1) |
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* [ | ] [ | ] |
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* [ 2 | 3 ] [ 2 | ] |
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* |
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* (x-1,y) (x,y) (x+1,y) |
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* [ | 1 ] [ 0 | 1 ] [ 0 | ] |
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* [ | 3 ] [ 2 | 3 ] [ | ] |
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*/ |
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switch (block) { |
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case 0: |
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xin1 = x - 1; |
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yin1 = y; |
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vec1 = 1; /* left */ |
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xin2 = x; |
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yin2 = y - 1; |
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vec2 = 2; /* top */ |
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xin3 = x + 1; |
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yin3 = y - 1; |
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vec3 = 2; /* top right */ |
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break; |
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case 1: |
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xin1 = x; |
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yin1 = y; |
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vec1 = 0; |
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xin2 = x; |
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yin2 = y - 1; |
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vec2 = 3; |
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xin3 = x + 1; |
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yin3 = y - 1; |
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vec3 = 2; |
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break; |
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case 2: |
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xin1 = x - 1; |
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yin1 = y; |
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vec1 = 3; |
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xin2 = x; |
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yin2 = y; |
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vec2 = 0; |
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xin3 = x; |
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yin3 = y; |
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vec3 = 1; |
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break; |
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default: |
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xin1 = x; |
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yin1 = y; |
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vec1 = 2; |
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xin2 = x; |
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yin2 = y; |
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vec2 = 0; |
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xin3 = x; |
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yin3 = y; |
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vec3 = 1; |
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} |
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if (xin1 < 0 || xin1 >= (int32_t) x_dim) { |
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pmv[1] = zeroMV; |
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psad[1] = MV_MAX_ERROR; |
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} else { |
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pmv[1] = pMBs[xin1 + yin1 * x_dim].mvs[vec1]; |
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psad[1] = pMBs[xin1 + yin1 * x_dim].sad8[vec1]; |
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} |
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if (xin2 < 0 || xin2 >= (int32_t) x_dim) { |
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pmv[2] = zeroMV; |
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psad[2] = MV_MAX_ERROR; |
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} else { |
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pmv[2] = pMBs[xin2 + yin2 * x_dim].mvs[vec2]; |
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psad[2] = pMBs[xin2 + yin2 * x_dim].sad8[vec2]; |
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} |
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if (xin3 < 0 || xin3 >= (int32_t) x_dim) { |
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pmv[3] = zeroMV; |
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psad[3] = MV_MAX_ERROR; |
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} else { |
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pmv[3] = pMBs[xin3 + yin3 * x_dim].mvs[vec3]; |
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psad[3] = pMBs[xin3 + yin3 * x_dim].sad8[vec3]; |
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} |
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if ((MVequal(pmv[1], pmv[2])) && (MVequal(pmv[1], pmv[3]))) { |
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pmv[0] = pmv[1]; |
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psad[0] = MIN(MIN(psad[1], psad[2]), psad[3]); |
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return 1; |
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} |
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/* median,minimum */ |
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pmv[0].x = |
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MIN(MAX(pmv[1].x, pmv[2].x), |
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MIN(MAX(pmv[2].x, pmv[3].x), MAX(pmv[1].x, pmv[3].x))); |
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pmv[0].y = |
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MIN(MAX(pmv[1].y, pmv[2].y), |
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MIN(MAX(pmv[2].y, pmv[3].y), MAX(pmv[1].y, pmv[3].y))); |
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psad[0] = MIN(MIN(psad[1], psad[2]), psad[3]); |
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return 0; |
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} |
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#endif |
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/* |
/* |
89 |
* MODE_INTER, vm18 page 48 |
* MODE_INTER, vm18 page 48 |
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lpos = lx + ly * mb_width; |
lpos = lx + ly * mb_width; |
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rpos = rx + ry * mb_width; |
rpos = rx + ry * mb_width; |
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tpos = tx + ty * mb_width; |
tpos = tx + ty * mb_width; |
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num_cand = 0; |
last_cand = num_cand = 0; |
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if (lpos >= bound && lx >= 0) { |
if (lpos >= bound && lx >= 0) { |
147 |
num_cand++; |
num_cand++; |
167 |
pmv[3] = zeroMV; |
pmv[3] = zeroMV; |
168 |
} |
} |
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/* if only one valid candidate predictor, the invalid candiates are set to the canidate */ |
/* |
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* If there're more than one candidate, we return the median vector |
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* edgomez : the special case "no candidates" is handled the same way |
173 |
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* because all vectors are set to zero. So the median vector |
174 |
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* is {0,0}, and this is exactly the vector we must return |
175 |
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* according to the mpeg4 specs. |
176 |
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*/ |
177 |
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178 |
if (num_cand != 1) { |
if (num_cand != 1) { |
179 |
/* set median */ |
/* set median */ |
180 |
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248 |
lpos = lx + ly * mb_width; |
lpos = lx + ly * mb_width; |
249 |
rpos = rx + ry * mb_width; |
rpos = rx + ry * mb_width; |
250 |
tpos = tx + ty * mb_width; |
tpos = tx + ty * mb_width; |
251 |
num_cand = 0; |
last_cand = num_cand = 0; |
252 |
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253 |
if (lpos >= bound && lx >= 0) { |
if (lpos >= bound && lx >= 0) { |
254 |
num_cand++; |
num_cand++; |
366 |
lpos = lx + ly * mb_width; |
lpos = lx + ly * mb_width; |
367 |
rpos = rx + ry * mb_width; |
rpos = rx + ry * mb_width; |
368 |
tpos = tx + ty * mb_width; |
tpos = tx + ty * mb_width; |
369 |
num_cand = 0; |
last_cand = num_cand = 0; |
370 |
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371 |
if (lpos >= bound && lx >= 0) { |
if (lpos >= bound && lx >= 0) { |
372 |
num_cand++; |
num_cand++; |
451 |
lpos = lx + ly * mb_width; |
lpos = lx + ly * mb_width; |
452 |
rpos = rx + ry * mb_width; |
rpos = rx + ry * mb_width; |
453 |
tpos = tx + ty * mb_width; |
tpos = tx + ty * mb_width; |
454 |
num_cand = 0; |
last_cand = num_cand = 0; |
455 |
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456 |
if (lpos >= bound && lx >= 0) { |
if (lpos >= bound && lx >= 0) { |
457 |
num_cand++; |
num_cand++; |