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revision 3, Fri Mar 8 02:46:11 2002 UTC revision 655, Sun Nov 17 00:57:58 2002 UTC
# Line 1  Line 1 
1    /*****************************************************************************
2     *
3     *  XVID MPEG-4 VIDEO CODEC
4     *  - zigzag dct block scanning -
5     *
6     *  Copyright(C) 2001-2002 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: zigzag.h,v 1.4 2002-11-17 00:57:57 edgomez Exp $
54     *
55     ****************************************************************************/
56    
57  #ifndef _ZIGZAG_H_  #ifndef _ZIGZAG_H_
58  #define _ZIGZAG_H_  #define _ZIGZAG_H_
59    
60  static const uint16_t scan_tables[3][64] =  static const uint16_t scan_tables[3][64] = {
 {  
61          {       // zig_zag_scan          {       // zig_zag_scan
62              0,  1,      8,      16, 9,  2,      3,      10,              0,  1,      8,      16, 9,  2,      3,      10,
63                  17, 24, 32, 25, 18, 11, 4,      5,                  17, 24, 32, 25, 18, 11, 4,      5,
# Line 11  Line 66 
66                  35, 42, 49, 56, 57, 50, 43, 36,                  35, 42, 49, 56, 57, 50, 43, 36,
67                  29, 22, 15, 23, 30, 37, 44, 51,                  29, 22, 15, 23, 30, 37, 44, 51,
68                  58, 59, 52, 45, 38, 31, 39, 46,                  58, 59, 52, 45, 38, 31, 39, 46,
69                  53, 60, 61, 54, 47, 55, 62, 63           53, 60, 61, 54, 47, 55, 62, 63},
         },  
70    
71          {       // horizontal_scan          {       // horizontal_scan
72              0,  1,      2,      3,      8,      9,      16, 17,              0,  1,      2,      3,      8,      9,      16, 17,
# Line 22  Line 76 
76              30, 31, 34, 35, 40, 41, 48, 49,              30, 31, 34, 35, 40, 41, 48, 49,
77              42, 43, 36, 37, 38, 39, 44, 45,              42, 43, 36, 37, 38, 39, 44, 45,
78              46, 47, 50, 51, 56, 57, 58, 59,              46, 47, 50, 51, 56, 57, 58, 59,
79              52, 53, 54, 55, 60, 61, 62, 63           52, 53, 54, 55, 60, 61, 62, 63},
         },  
80    
81          {       // vertical_scan          {       // vertical_scan
82              0, 8, 16, 24, 1, 9, 2, 10,              0, 8, 16, 24, 1, 9, 2, 10,
# Line 33  Line 86 
86              51, 59, 20, 28, 5, 13, 6, 14,              51, 59, 20, 28, 5, 13, 6, 14,
87              21, 29, 36, 44, 52, 60, 37, 45,              21, 29, 36, 44, 52, 60, 37, 45,
88              53, 61, 22, 30, 7, 15, 23, 31,              53, 61, 22, 30, 7, 15, 23, 31,
89              38, 46, 54, 62, 39, 47, 55, 63           38, 46, 54, 62, 39, 47, 55, 63}
         }  
90  };  };
91    
92  #endif /* _ZIGZAG_H_ */  #endif /* _ZIGZAG_H_ */
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