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1 : edgomez 406 /*****************************************************************************
2 :     *
3 :     * XVID MPEG-4 VIDEO CODEC
4 :     * - Global structures, constants -
5 :     *
6 : edgomez 603 * Copyright(C) 2002 Michael Militzer <isibaar@xvid.org>
7 : edgomez 406 *
8 : edgomez 648 * This file is part of XviD, a free MPEG-4 video encoder/decoder
9 : edgomez 406 *
10 : edgomez 648 * XviD is free software; you can redistribute it and/or modify it
11 :     * 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 : edgomez 406 * (at your option) any later version.
14 :     *
15 :     * This program is distributed in the hope that it will be useful,
16 : edgomez 648 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 : edgomez 406 * 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 : edgomez 648 * along with this program; if not, write to the Free Software
22 : edgomez 406 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 :     *
24 : edgomez 648 * Under section 8 of the GNU General Public License, the copyright
25 :     * holders of XVID explicitly forbid distribution in the following
26 :     * countries:
27 : edgomez 406 *
28 : edgomez 648 * - Japan
29 :     * - United States of America
30 :     *
31 :     * Linking XviD statically or dynamically with other modules is making a
32 :     * combined work based on XviD. Thus, the terms and conditions of the
33 :     * GNU General Public License cover the whole combination.
34 :     *
35 :     * As a special exception, the copyright holders of XviD give you
36 :     * permission to link XviD with independent modules that communicate with
37 :     * XviD solely through the VFW1.1 and DShow interfaces, regardless of the
38 :     * license terms of these independent modules, and to copy and distribute
39 :     * the resulting combined work under terms of your choice, provided that
40 :     * every copy of the combined work is accompanied by a complete copy of
41 :     * the source code of XviD (the version of XviD used to produce the
42 :     * combined work), being distributed under the terms of the GNU General
43 :     * Public License plus this exception. An independent module is a module
44 :     * which is not derived from or based on XviD.
45 :     *
46 :     * Note that people who make modified versions of XviD are not obligated
47 :     * to grant this special exception for their modified versions; it is
48 :     * their choice whether to do so. The GNU General Public License gives
49 :     * permission to release a modified version without this exception; this
50 :     * exception also makes it possible to release a modified version which
51 :     * carries forward this exception.
52 :     *
53 :     * $Id: global.h,v 1.16 2002-11-16 23:38:16 edgomez Exp $
54 :     *
55 : edgomez 406 ****************************************************************************/
56 :    
57 : Isibaar 3 #ifndef _GLOBAL_H_
58 :     #define _GLOBAL_H_
59 :    
60 : h 101 #include "xvid.h"
61 : Isibaar 3 #include "portab.h"
62 :    
63 : suxen_drol 118 /* --- macroblock modes --- */
64 : Isibaar 3
65 :     #define MODE_INTER 0
66 :     #define MODE_INTER_Q 1
67 :     #define MODE_INTER4V 2
68 :     #define MODE_INTRA 3
69 :     #define MODE_INTRA_Q 4
70 :     #define MODE_STUFFING 7
71 :     #define MODE_NOT_CODED 16
72 :    
73 : suxen_drol 118 /* --- bframe specific --- */
74 :    
75 :     #define MODE_DIRECT 0
76 :     #define MODE_INTERPOLATE 1
77 :     #define MODE_BACKWARD 2
78 :     #define MODE_FORWARD 3
79 : chenm001 156 #define MODE_DIRECT_NONE_MV 4
80 : suxen_drol 118
81 :    
82 : Isibaar 3 typedef struct
83 :     {
84 : h 101 uint32_t bufa;
85 :     uint32_t bufb;
86 :     uint32_t buf;
87 :     uint32_t pos;
88 :     uint32_t *tail;
89 :     uint32_t *start;
90 :     uint32_t length;
91 : edgomez 195 }
92 : h 101 Bitstream;
93 : Isibaar 3
94 :    
95 :     #define MBPRED_SIZE 15
96 :    
97 :    
98 :     typedef struct
99 :     {
100 :     // decoder/encoder
101 :     VECTOR mvs[4];
102 :    
103 : chl 172 short int pred_values[6][MBPRED_SIZE];
104 :     int acpred_directions[6];
105 : edgomez 195
106 : Isibaar 3 int mode;
107 : edgomez 195 int quant; // absolute quant
108 : Isibaar 3
109 : h 69 int field_dct;
110 :     int field_pred;
111 :     int field_for_top;
112 :     int field_for_bot;
113 :    
114 : Isibaar 3 // encoder specific
115 :    
116 : chl 172 VECTOR mv16;
117 : Isibaar 3 VECTOR pmvs[4];
118 : chl 172
119 : edgomez 195 int32_t sad8[4]; // SAD values for inter4v-VECTORs
120 :     int32_t sad16; // SAD value for inter-VECTOR
121 : chl 172
122 : Isibaar 3 int dquant;
123 :     int cbp;
124 :    
125 : suxen_drol 118 // bframe stuff
126 :    
127 :     VECTOR b_mvs[4];
128 :     VECTOR b_pmvs[4];
129 :    
130 : chl 338 // bframe direct mode
131 :    
132 :     VECTOR directmv[4];
133 :     VECTOR deltamv;
134 :    
135 : chenm001 156 int mb_type;
136 :     int dbquant;
137 :    
138 : chl 277 // stuff for block based ME (needed for Qpel ME)
139 :     // backup of last integer ME vectors/sad
140 :    
141 :     VECTOR i_mv16;
142 : chl 287 VECTOR i_mvs[4];
143 : chl 277
144 : chl 287 int32_t i_sad8[4]; // SAD values for inter4v-VECTORs
145 :     int32_t i_sad16; // SAD value for inter-VECTOR
146 : chl 277
147 : edgomez 195 }
148 :     MACROBLOCK;
149 : Isibaar 3
150 : edgomez 195 static __inline int8_t
151 :     get_dc_scaler(uint32_t quant,
152 :     uint32_t lum)
153 : Isibaar 3 {
154 : edgomez 195 if (quant < 5)
155 :     return 8;
156 : Isibaar 3
157 : edgomez 195 if (quant < 25 && !lum)
158 :     return (quant + 13) / 2;
159 : Isibaar 3
160 : edgomez 195 if (quant < 9)
161 :     return 2 * quant;
162 : Isibaar 3
163 : edgomez 195 if (quant < 25)
164 :     return quant + 8;
165 : Isibaar 3
166 : edgomez 195 if (lum)
167 : Isibaar 157 return 2 * quant - 16;
168 : Isibaar 3 else
169 : edgomez 195 return quant - 6;
170 : Isibaar 3 }
171 :    
172 : suxen_drol 118 // useful macros
173 :    
174 :     #define MIN(X, Y) ((X)<(Y)?(X):(Y))
175 :     #define MAX(X, Y) ((X)>(Y)?(X):(Y))
176 :     #define ABS(X) (((X)>0)?(X):-(X))
177 :     #define SIGN(X) (((X)>0)?1:-1)
178 :    
179 :    
180 : edgomez 406 #endif /* _GLOBAL_H_ */

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