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revision 3, Fri Mar 8 02:46:11 2002 UTC revision 648, Sat Nov 16 23:38:16 2002 UTC
# Line 1  Line 1 
1    /*****************************************************************************
2     *
3     *  XVID MPEG-4 VIDEO CODEC
4     *  - Global structures, constants -
5     *
6     *  Copyright(C) 2002 Michael Militzer <isibaar@xvid.org>
7     *
8     *  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     *  (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     *  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     * $Id: global.h,v 1.16 2002-11-16 23:38:16 edgomez Exp $
54     *
55     ****************************************************************************/
56    
57  #ifndef _GLOBAL_H_  #ifndef _GLOBAL_H_
58  #define _GLOBAL_H_  #define _GLOBAL_H_
59    
60    #include "xvid.h"
61  #include "portab.h"  #include "portab.h"
62    
63  /* --- macroblock stuff --- */  /* --- macroblock modes --- */
64    
65  #define MODE_INTER              0  #define MODE_INTER              0
66  #define MODE_INTER_Q    1  #define MODE_INTER_Q    1
# Line 13  Line 70 
70  #define MODE_STUFFING   7  #define MODE_STUFFING   7
71  #define MODE_NOT_CODED  16  #define MODE_NOT_CODED  16
72    
73    /* --- bframe specific --- */
74    
75    #define MODE_DIRECT                     0
76    #define MODE_INTERPOLATE        1
77    #define MODE_BACKWARD           2
78    #define MODE_FORWARD            3
79    #define MODE_DIRECT_NONE_MV     4
80    
81    
82  typedef struct  typedef struct
83  {  {
84          int x;          uint32_t bufa;
85          int y;          uint32_t bufb;
86  } VECTOR;          uint32_t buf;
87            uint32_t pos;
88            uint32_t *tail;
89            uint32_t *start;
90            uint32_t length;
91    }
92    Bitstream;
93    
94    
95  #define MBPRED_SIZE  15  #define MBPRED_SIZE  15
# Line 27  Line 99 
99  {  {
100          // decoder/encoder          // decoder/encoder
101          VECTOR mvs[4];          VECTOR mvs[4];
         uint32_t sad8[4];               // SAD values for inter4v-VECTORs  
         uint32_t sad16;                 // SAD value for inter-VECTOR  
102    
103      short int pred_values[6][MBPRED_SIZE];      short int pred_values[6][MBPRED_SIZE];
104      int acpred_directions[6];      int acpred_directions[6];
# Line 36  Line 106 
106          int mode;          int mode;
107          int quant;              // absolute quant          int quant;              // absolute quant
108    
109            int field_dct;
110            int field_pred;
111            int field_for_top;
112            int field_for_bot;
113    
114          // encoder specific          // encoder specific
115    
116            VECTOR mv16;
117          VECTOR pmvs[4];          VECTOR pmvs[4];
118    
119            int32_t sad8[4];                        // SAD values for inter4v-VECTORs
120            int32_t sad16;                          // SAD value for inter-VECTOR
121    
122          int dquant;          int dquant;
123          int cbp;          int cbp;
124    
125  } MACROBLOCK;          // bframe stuff
126    
127  static __inline int8_t get_dc_scaler(int32_t quant, uint32_t lum)          VECTOR b_mvs[4];
128  {          VECTOR b_pmvs[4];
     int8_t dc_scaler;  
129    
130          if(quant > 0 && quant < 5) {          // bframe direct mode
         dc_scaler = 8;  
                 return dc_scaler;  
         }  
131    
132          if(quant < 25 && !lum) {          VECTOR directmv[4];
133          dc_scaler = (quant + 13) >> 1;          VECTOR deltamv;
                 return dc_scaler;  
         }  
134    
135          if(quant < 9) {          int mb_type;
136          dc_scaler = quant << 1;          int dbquant;
137                  return dc_scaler;  
138          }          // stuff for block based ME (needed for Qpel ME)
139            // backup of last integer ME vectors/sad
140    
141            VECTOR i_mv16;
142            VECTOR i_mvs[4];
143    
144            int32_t i_sad8[4];      // SAD values for inter4v-VECTORs
145            int32_t i_sad16;        // SAD value for inter-VECTOR
146    
     if(quant < 25) {  
         dc_scaler = quant + 8;  
                 return dc_scaler;  
147          }          }
148    MACROBLOCK;
149    
150    static __inline int8_t
151    get_dc_scaler(uint32_t quant,
152                              uint32_t lum)
153    {
154            if (quant < 5)
155                    return 8;
156    
157            if (quant < 25 && !lum)
158                    return (quant + 13) / 2;
159    
160            if (quant < 9)
161                    return 2 * quant;
162    
163            if (quant < 25)
164                    return quant + 8;
165    
166          if(lum)          if(lum)
167                  dc_scaler = (quant << 1) - 16;                  return 2 * quant - 16;
168          else          else
169          dc_scaler = quant - 6;                  return quant - 6;
   
     return dc_scaler;  
170  }  }
171    
172    // 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  #endif /* _GLOBAL_H_ */  #endif /* _GLOBAL_H_ */

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