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revision 1.14, Wed Sep 4 21:59:27 2002 UTC revision 1.18, Sun Dec 15 01:21:12 2002 UTC
# Line 3  Line 3 
3   *  XVID MPEG-4 VIDEO CODEC   *  XVID MPEG-4 VIDEO CODEC
4   *  - Global structures, constants -   *  - Global structures, constants -
5   *   *
6   *  Copyright(C) 2002 Michael Militzer   *  Copyright(C) 2002 Michael Militzer <isibaar@xvid.org>
7   *   *
8   *  This program is an implementation of a part of one or more MPEG-4   *  This file is part of XviD, a free MPEG-4 video encoder/decoder
  *  Video tools as specified in ISO/IEC 14496-2 standard.  Those intending  
  *  to use this software module in hardware or software products are  
  *  advised that its use may infringe existing patents or copyrights, and  
  *  any such use would be at such party's own risk.  The original  
  *  developer of this software module and his/her company, and subsequent  
  *  editors and their companies, will have no liability for use of this  
  *  software or modifications or derivatives thereof.  
9   *   *
10   *  This program is free software ; you can redistribute it and/or modify   *  XviD is free software; you can redistribute it and/or modify it
11   *  it under the terms of the GNU General Public License as published by   *  under the terms of the GNU General Public License as published by
12   *  the Free Software Foundation ; either version 2 of the License, or   *  the Free Software Foundation ; either version 2 of the License, or
13   *  (at your option) any later version.   *  (at your option) any later version.
14   *   *
# Line 28  Line 21 
21   *  along with this program ; if not, write to the Free Software   *  along with this program ; if not, write to the Free Software
22   *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA   *  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   * $Id$   * $Id$
54   *   *
55   ****************************************************************************/   ****************************************************************************/
# Line 75  Line 97 
97    
98  typedef struct  typedef struct
99  {  {
100          // decoder/encoder          /* decoder/encoder  */
101          VECTOR mvs[4];          VECTOR mvs[4];
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;          VECTOR mv16;
117          VECTOR pmvs[4];          VECTOR pmvs[4];
118    
119          int32_t sad8[4];                        // SAD values for inter4v-VECTORs          int32_t sad8[4];                        /* SAD values for inter4v-VECTORs */
120          int32_t sad16;                          // SAD value for inter-VECTOR          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          // bframe direct mode          /* bframe direct mode */
131    
132          VECTOR directmv[4];          VECTOR directmv[4];
133          VECTOR deltamv;          VECTOR deltamv;
# Line 113  Line 135 
135          int mb_type;          int mb_type;
136          int dbquant;          int dbquant;
137    
138          // stuff for block based ME (needed for Qpel ME)          /* stuff for block based ME (needed for Qpel ME) */
139          // backup of last integer ME vectors/sad          /* backup of last integer ME vectors/sad */
140    
141          VECTOR i_mv16;          VECTOR i_mv16;
142          VECTOR i_mvs[4];          VECTOR i_mvs[4];
143    
144          int32_t i_sad8[4];      // SAD values for inter4v-VECTORs          int32_t i_sad8[4];      /* SAD values for inter4v-VECTORs */
145          int32_t i_sad16;        // SAD value for inter-VECTOR          int32_t i_sad16;        /* SAD value for inter-VECTOR */
146    
147  }  }
148  MACROBLOCK;  MACROBLOCK;
# Line 133  Line 155 
155                  return 8;                  return 8;
156    
157          if (quant < 25 && !lum)          if (quant < 25 && !lum)
158                  return (quant + 13) / 2;                  return (int8_t)((quant + 13) / 2);
159    
160          if (quant < 9)          if (quant < 9)
161                  return 2 * quant;                  return (int8_t)(2 * quant);
162    
163          if (quant < 25)          if (quant < 25)
164                  return quant + 8;                  return (int8_t)(quant + 8);
165    
166          if (lum)          if (lum)
167                  return 2 * quant - 16;                  return (int8_t)(2 * quant - 16);
168          else          else
169                  return quant - 6;                  return (int8_t)(quant - 6);
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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