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revision 1.5, Sat Apr 13 16:30:01 2002 UTC revision 1.18, Sun Dec 15 01:21:12 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     * $Id$
54     *
55     ****************************************************************************/
56    
57  #ifndef _GLOBAL_H_  #ifndef _GLOBAL_H_
58  #define _GLOBAL_H_  #define _GLOBAL_H_
59    
# Line 20  Line 76 
76  #define MODE_INTERPOLATE        1  #define MODE_INTERPOLATE        1
77  #define MODE_BACKWARD           2  #define MODE_BACKWARD           2
78  #define MODE_FORWARD            3  #define MODE_FORWARD            3
79    #define MODE_DIRECT_NONE_MV     4
80    
81    
82  typedef struct  typedef struct
# Line 40  Line 97 
97    
98  typedef struct  typedef struct
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];
105    
106          int mode;          int mode;
107          int quant;              // absolute quant          int quant;                                      /* absolute quant */
108    
109          int field_dct;          int field_dct;
110          int field_pred;          int field_pred;
111          int field_for_top;          int field_for_top;
112          int field_for_bot;          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          // bframe stuff          /* bframe stuff */
126    
127          VECTOR b_mvs[4];          VECTOR b_mvs[4];
128          VECTOR b_pmvs[4];          VECTOR b_pmvs[4];
129    
130  } MACROBLOCK;          /* bframe direct mode */
131    
132  static __inline int8_t get_dc_scaler(int32_t quant, uint32_t lum)          VECTOR directmv[4];
133  {          VECTOR deltamv;
     int8_t dc_scaler;  
134    
135          if(quant > 0 && quant < 5) {          int mb_type;
136          dc_scaler = 8;          int dbquant;
                 return dc_scaler;  
         }  
137    
138          if(quant < 25 && !lum) {          /* stuff for block based ME (needed for Qpel ME) */
139          dc_scaler = (quant + 13) >> 1;          /* backup of last integer ME vectors/sad */
                 return dc_scaler;  
         }  
140    
141          if(quant < 9) {          VECTOR i_mv16;
142          dc_scaler = quant << 1;          VECTOR i_mvs[4];
143                  return dc_scaler;  
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 (int8_t)((quant + 13) / 2);
159    
160            if (quant < 9)
161                    return (int8_t)(2 * quant);
162    
163            if (quant < 25)
164                    return (int8_t)(quant + 8);
165    
166          if(lum)          if(lum)
167                  dc_scaler = (quant << 1) - 16;                  return (int8_t)(2 * quant - 16);
168          else          else
169          dc_scaler = quant - 6;                  return (int8_t)(quant - 6);
   
     return dc_scaler;  
170  }  }
171    
172    /* useful macros */
 // useful macros  
173    
174  #define MIN(X, Y) ((X)<(Y)?(X):(Y))  #define MIN(X, Y) ((X)<(Y)?(X):(Y))
175  #define MAX(X, Y) ((X)>(Y)?(X):(Y))  #define MAX(X, Y) ((X)>(Y)?(X):(Y))

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