[cvs] / xvidcore / src / bitstream / zigzag.h Repository:
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revision 1.6, Sat Feb 15 15:22:18 2003 UTC revision 1.7, Mon Mar 22 22:36:23 2004 UTC
# Line 1  Line 1 
1    /*****************************************************************************
2     *
3     *  XVID MPEG-4 VIDEO CODEC
4     *  - ZigZag order matrices  -
5     *
6     *  Copyright(C) 2001-2002 Michael Militzer <isibaar@xvid.org>
7     *
8     *  This program is free software ; you can redistribute it and/or modify
9     *  it under the terms of the GNU General Public License as published by
10     *  the Free Software Foundation ; either version 2 of the License, or
11     *  (at your option) any later version.
12     *
13     *  This program is distributed in the hope that it will be useful,
14     *  but WITHOUT ANY WARRANTY ; without even the implied warranty of
15     *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16     *  GNU General Public License for more details.
17     *
18     *  You should have received a copy of the GNU General Public License
19     *  along with this program ; if not, write to the Free Software
20     *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
21     *
22     * $Id$
23     *
24     ****************************************************************************/
25    
26  #ifndef _ZIGZAG_H_  #ifndef _ZIGZAG_H_
27  #define _ZIGZAG_H_  #define _ZIGZAG_H_
28    
29  static const uint16_t scan_tables[3][64] = {  static const uint16_t scan_tables[3][64] = {
30          {                                                       // zig_zag_scan          /* zig_zag_scan */
31           0, 1, 8, 16, 9, 2, 3, 10,          { 0,  1,  8, 16,  9,  2,  3, 10,
32           17, 24, 32, 25, 18, 11, 4, 5,           17, 24, 32, 25, 18, 11, 4, 5,
33           12, 19, 26, 33, 40, 48, 41, 34,           12, 19, 26, 33, 40, 48, 41, 34,
34           27, 20, 13, 6, 7, 14, 21, 28,           27, 20, 13, 6, 7, 14, 21, 28,
# Line 12  Line 37 
37           58, 59, 52, 45, 38, 31, 39, 46,           58, 59, 52, 45, 38, 31, 39, 46,
38           53, 60, 61, 54, 47, 55, 62, 63},           53, 60, 61, 54, 47, 55, 62, 63},
39    
40          {                                                       // horizontal_scan          /* horizontal_scan */
41           0, 1, 2, 3, 8, 9, 16, 17,          { 0,  1,  2,  3,  8,  9, 16, 17,
42           10, 11, 4, 5, 6, 7, 15, 14,           10, 11, 4, 5, 6, 7, 15, 14,
43           13, 12, 19, 18, 24, 25, 32, 33,           13, 12, 19, 18, 24, 25, 32, 33,
44           26, 27, 20, 21, 22, 23, 28, 29,           26, 27, 20, 21, 22, 23, 28, 29,
# Line 22  Line 47 
47           46, 47, 50, 51, 56, 57, 58, 59,           46, 47, 50, 51, 56, 57, 58, 59,
48           52, 53, 54, 55, 60, 61, 62, 63},           52, 53, 54, 55, 60, 61, 62, 63},
49    
50          {                                                       // vertical_scan          /* vertical_scan */
51           0, 8, 16, 24, 1, 9, 2, 10,          { 0,  8, 16, 24,  1,  9,  2, 10,
52           17, 25, 32, 40, 48, 56, 57, 49,           17, 25, 32, 40, 48, 56, 57, 49,
53           41, 33, 26, 18, 3, 11, 4, 12,           41, 33, 26, 18, 3, 11, 4, 12,
54           19, 27, 34, 42, 50, 58, 35, 43,           19, 27, 34, 42, 50, 58, 35, 43,

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