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revision 1.1, Wed Sep 10 22:19:00 2003 UTC revision 1.1.2.3, Mon Sep 29 16:58:37 2003 UTC
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1    /*****************************************************************************
2     *
3     *  XVID MPEG-4 VIDEO CODEC
4     *  - Motion Estimation shared functions -
5     *
6     *  Copyright(C) 2002 Christoph Lampert <gruel@web.de>
7     *               2002 Michael Militzer <michael@xvid.org>
8     *               2002-2003 Radoslaw Czyz <xvid@syskin.cjb.net>
9     *
10     *  This program is free software ; you can redistribute it and/or modify
11     *  it under the terms of the GNU General Public License as published by
12     *  the Free Software Foundation ; either version 2 of the License, or
13     *  (at your option) any later version.
14     *
15     *  This program is distributed in the hope that it will be useful,
16     *  but WITHOUT ANY WARRANTY ; without even the implied warranty of
17     *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18     *  GNU General Public License for more details.
19     *
20     *  You should have received a copy of the GNU General Public License
21     *  along with this program ; if not, write to the Free Software
22     *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
23     *
24     * $Id$
25     *
26     ****************************************************************************/
27    
28    #ifndef _MOTION_INLINES_
29    #define _MOTION_INLINES_
30    
31    #include <stdlib.h>
32    
33    /*
34     * Calculate the min/max range
35     * relative to the _MACROBLOCK_ position
36     */
37    static void __inline
38    get_range(int32_t * const min_dx,
39                      int32_t * const max_dx,
40                      int32_t * const min_dy,
41                      int32_t * const max_dy,
42                      const uint32_t x,
43                      const uint32_t y,
44                      uint32_t block_sz, /* block dimension, 3(8) or 4(16) */
45                      const uint32_t width,
46                      const uint32_t height,
47                      const uint32_t fcode,
48                      const int precision, /* 2 for qpel, 1 for halfpel */
49                      const int rrv)
50    {
51            int k;
52            const int search_range = 16 << fcode;
53            int high = search_range - 1;
54            int low = -search_range;
55    
56            if (rrv) {
57                    high = RRV_MV_SCALEUP(high);
58                    low = RRV_MV_SCALEUP(low);
59                    block_sz++;
60            }
61    
62            k = (int)(width - (x<<block_sz))<<precision;
63            *max_dx = MIN(high, k);
64            k = (int)(height -  (y<<block_sz))<<precision;
65            *max_dy = MIN(high, k);
66    
67            k = (-(int)((x+1)<<block_sz))<<precision;
68            *min_dx = MAX(low, k);
69            k = (-(int)((y+1)<<block_sz))<<precision;
70            *min_dy = MAX(low, k);
71    }
72    
73    /* mv.length table */
74    static const int mvtab[64] = {
75            1, 2, 3, 4, 6, 7, 7, 7,
76            9, 9, 9, 10, 10, 10, 10, 10,
77            10, 10, 10, 10, 10, 10, 10, 10,
78            10, 11, 11, 11, 11, 11, 11, 12,
79            12, 12, 12, 12, 12, 12, 12, 12,
80            12, 12, 12, 12, 12, 12, 12, 12,
81            12, 12, 12, 12, 12, 12, 12, 12
82    };
83    
84    static __inline uint32_t
85    d_mv_bits(int x, int y, const VECTOR pred, const uint32_t iFcode, const int qpel, const int rrv)
86    {
87            int bits;
88            const int q = (1 << (iFcode - 1)) - 1;
89    
90            x <<= qpel;
91            y <<= qpel;
92            if (rrv) { x = RRV_MV_SCALEDOWN(x); y = RRV_MV_SCALEDOWN(y); }
93    
94            x -= pred.x;
95            bits = (x != 0 ? iFcode:0);
96            x = abs(x);
97            x += q;
98            x >>= (iFcode - 1);
99            bits += mvtab[x];
100    
101            y -= pred.y;
102            bits += (y != 0 ? iFcode:0);
103            y = abs(y);
104            y += q;
105            y >>= (iFcode - 1);
106            bits += mvtab[y];
107    
108            return bits;
109    }
110    
111    static __inline const uint8_t *
112    GetReference(const int x, const int y, const SearchData * const data)
113    {
114            const int picture = ((x&1)<<1) | (y&1);
115            const int offset = (x>>1) + (y>>1)*data->iEdgedWidth;
116            return data->RefP[picture] + offset;
117    }
118    
119    static __inline const uint8_t *
120    GetReferenceB(const int x, const int y, const uint32_t dir, const SearchData * const data)
121    {
122            /* dir : 0 = forward, 1 = backward */
123            const uint8_t *const *const direction = ( dir == 0 ? data->RefP : data->b_RefP );
124            const int picture = ((x&1)<<1) | (y&1);
125            const int offset = (x>>1) + (y>>1)*data->iEdgedWidth;
126            return direction[picture] + offset;
127    }
128    
129    static __inline void
130    ZeroMacroblockP(MACROBLOCK *pMB, const int32_t sad)
131    {
132            pMB->mode = MODE_INTER;
133            pMB->mvs[0] = pMB->mvs[1] = pMB->mvs[2] = pMB->mvs[3] = zeroMV;
134            pMB->qmvs[0] = pMB->qmvs[1] = pMB->qmvs[2] = pMB->qmvs[3] = zeroMV;
135            pMB->sad16 = pMB->sad8[0] = pMB->sad8[1] = pMB->sad8[2] = pMB->sad8[3] = sad;
136            pMB->mcsel = 0;
137    }
138    
139    /* check if given vector is equal to any vector checked before */
140    static __inline int
141    vector_repeats(const VECTOR * const pmv, const unsigned int i)
142    {
143            unsigned int j;
144            for (j = 0; j < i; j++)
145                    if (MVequal(pmv[i], pmv[j])) return 1; /* same vector has been checked already */
146            return 0;
147    }
148    
149    /*      make a binary mask that prevents diamonds/squares
150            from checking a vector which has been checked as a prediction */
151    static __inline int
152    make_mask(const VECTOR * const pmv, const unsigned int i, const unsigned int current)
153    {
154            unsigned int mask = 255, j;
155            for (j = 0; j < i; j++) {
156                    if (pmv[current].x == pmv[j].x) {
157                            if (pmv[current].y == pmv[j].y + iDiamondSize) mask &= ~4;
158                            else if (pmv[current].y == pmv[j].y - iDiamondSize) mask &= ~8;
159                    } else
160                            if (pmv[current].y == pmv[j].y) {
161                                    if (pmv[current].x == pmv[j].x + iDiamondSize) mask &= ~1;
162                                    else if (pmv[current].x == pmv[j].x - iDiamondSize) mask &= ~2;
163                            }
164            }
165            return mask;
166    }
167    
168    #endif /* _MOTION_INLINES_ */
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