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1 : edgomez 1.14 /*****************************************************************************
2 :     *
3 :     * XVID MPEG-4 VIDEO CODEC
4 :     * - Global structures, constants -
5 :     *
6 : edgomez 1.15 * Copyright(C) 2002 Michael Militzer <isibaar@xvid.org>
7 : edgomez 1.14 *
8 : edgomez 1.16 * This file is part of XviD, a free MPEG-4 video encoder/decoder
9 :     *
10 :     * 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 1.14 * (at your option) any later version.
14 :     *
15 :     * This program is distributed in the hope that it will be useful,
16 : edgomez 1.16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 : edgomez 1.14 * 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 1.16 * along with this program; if not, write to the Free Software
22 : edgomez 1.14 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 :     *
24 : edgomez 1.16 * Under section 8 of the GNU General Public License, the copyright
25 :     * holders of XVID explicitly forbid distribution in the following
26 :     * countries:
27 :     *
28 :     * - 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 : edgomez 1.18.2.1 * $Id: global.h,v 1.18 2002/12/15 01:21:12 edgomez Exp $
54 : edgomez 1.14 *
55 :     ****************************************************************************/
56 :    
57 : Isibaar 1.1 #ifndef _GLOBAL_H_
58 :     #define _GLOBAL_H_
59 :    
60 : h 1.4 #include "xvid.h"
61 : Isibaar 1.1 #include "portab.h"
62 :    
63 : suxen_drol 1.5 /* --- macroblock modes --- */
64 : Isibaar 1.1
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 1.5 /* --- 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 1.6 #define MODE_DIRECT_NONE_MV 4
80 : suxen_drol 1.5
81 :    
82 : Isibaar 1.1 typedef struct
83 :     {
84 : h 1.4 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 1.18.2.1 uint32_t initpos;
92 : edgomez 1.10 }
93 : h 1.4 Bitstream;
94 : Isibaar 1.1
95 :    
96 :     #define MBPRED_SIZE 15
97 :    
98 :    
99 :     typedef struct
100 :     {
101 : edgomez 1.17 /* decoder/encoder */
102 : Isibaar 1.1 VECTOR mvs[4];
103 :    
104 : chl 1.9 short int pred_values[6][MBPRED_SIZE];
105 :     int acpred_directions[6];
106 : edgomez 1.10
107 : Isibaar 1.1 int mode;
108 : edgomez 1.17 int quant; /* absolute quant */
109 : Isibaar 1.1
110 : h 1.2 int field_dct;
111 :     int field_pred;
112 :     int field_for_top;
113 :     int field_for_bot;
114 :    
115 : edgomez 1.17 /* encoder specific */
116 : Isibaar 1.1
117 : chl 1.9 VECTOR mv16;
118 : Isibaar 1.1 VECTOR pmvs[4];
119 : chl 1.9
120 : edgomez 1.17 int32_t sad8[4]; /* SAD values for inter4v-VECTORs */
121 :     int32_t sad16; /* SAD value for inter-VECTOR */
122 : chl 1.9
123 : Isibaar 1.1 int dquant;
124 :     int cbp;
125 :    
126 : edgomez 1.17 /* bframe stuff */
127 : suxen_drol 1.5
128 :     VECTOR b_mvs[4];
129 :     VECTOR b_pmvs[4];
130 : chenm001 1.6
131 : edgomez 1.17 /* bframe direct mode */
132 : chl 1.13
133 :     VECTOR directmv[4];
134 :     VECTOR deltamv;
135 :    
136 : chenm001 1.6 int mb_type;
137 :     int dbquant;
138 : suxen_drol 1.5
139 : edgomez 1.17 /* stuff for block based ME (needed for Qpel ME) */
140 :     /* backup of last integer ME vectors/sad */
141 : chl 1.11
142 :     VECTOR i_mv16;
143 : chl 1.12 VECTOR i_mvs[4];
144 : chl 1.11
145 : edgomez 1.17 int32_t i_sad8[4]; /* SAD values for inter4v-VECTORs */
146 :     int32_t i_sad16; /* SAD value for inter-VECTOR */
147 : chl 1.11
148 : edgomez 1.10 }
149 :     MACROBLOCK;
150 : Isibaar 1.1
151 : edgomez 1.10 static __inline int8_t
152 :     get_dc_scaler(uint32_t quant,
153 :     uint32_t lum)
154 : Isibaar 1.1 {
155 : edgomez 1.10 if (quant < 5)
156 :     return 8;
157 : Isibaar 1.1
158 : edgomez 1.10 if (quant < 25 && !lum)
159 : edgomez 1.18 return (int8_t)((quant + 13) / 2);
160 : Isibaar 1.1
161 : edgomez 1.10 if (quant < 9)
162 : edgomez 1.18 return (int8_t)(2 * quant);
163 : Isibaar 1.1
164 : edgomez 1.10 if (quant < 25)
165 : edgomez 1.18 return (int8_t)(quant + 8);
166 : Isibaar 1.1
167 : edgomez 1.10 if (lum)
168 : edgomez 1.18 return (int8_t)(2 * quant - 16);
169 : Isibaar 1.1 else
170 : edgomez 1.18 return (int8_t)(quant - 6);
171 : Isibaar 1.1 }
172 : suxen_drol 1.5
173 : edgomez 1.17 /* useful macros */
174 : suxen_drol 1.5
175 :     #define MIN(X, Y) ((X)<(Y)?(X):(Y))
176 :     #define MAX(X, Y) ((X)>(Y)?(X):(Y))
177 :     #define ABS(X) (((X)>0)?(X):-(X))
178 :     #define SIGN(X) (((X)>0)?1:-1)
179 :    
180 : Isibaar 1.1
181 : edgomez 1.14 #endif /* _GLOBAL_H_ */

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