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Revision 470 - (view) (download)
Original Path: trunk/xvidcore/src/bitstream/zigzag.h

1 : edgomez 470 /*****************************************************************************
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 program is an implementation of a part of one or more MPEG-4
9 :     * Video tools as specified in ISO/IEC 14496-2 standard. Those intending
10 :     * to use this software module in hardware or software products are
11 :     * advised that its use may infringe existing patents or copyrights, and
12 :     * any such use would be at such party's own risk. The original
13 :     * developer of this software module and his/her company, and subsequent
14 :     * editors and their companies, will have no liability for use of this
15 :     * software or modifications or derivatives thereof.
16 :     *
17 :     * This program is free software ; you can redistribute it and/or modify
18 :     * it under the terms of the GNU General Public License as published by
19 :     * the Free Software Foundation ; either version 2 of the License, or
20 :     * (at your option) any later version.
21 :     *
22 :     * This program is distributed in the hope that it will be useful,
23 :     * but WITHOUT ANY WARRANTY ; without even the implied warranty of
24 :     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25 :     * GNU General Public License for more details.
26 :     *
27 :     * You should have received a copy of the GNU General Public License
28 :     * along with this program ; if not, write to the Free Software
29 :     * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
30 :     *
31 :     * $Id: zigzag.h,v 1.3 2002-09-10 22:54:23 edgomez Exp $
32 :     *
33 :     ****************************************************************************/
34 :    
35 : Isibaar 3 #ifndef _ZIGZAG_H_
36 :     #define _ZIGZAG_H_
37 :    
38 : edgomez 195 static const uint16_t scan_tables[3][64] = {
39 :     { // zig_zag_scan
40 :     0, 1, 8, 16, 9, 2, 3, 10,
41 :     17, 24, 32, 25, 18, 11, 4, 5,
42 :     12, 19, 26, 33, 40, 48, 41, 34,
43 :     27, 20, 13, 6, 7, 14, 21, 28,
44 :     35, 42, 49, 56, 57, 50, 43, 36,
45 :     29, 22, 15, 23, 30, 37, 44, 51,
46 :     58, 59, 52, 45, 38, 31, 39, 46,
47 :     53, 60, 61, 54, 47, 55, 62, 63},
48 : Isibaar 3
49 : edgomez 195 { // horizontal_scan
50 :     0, 1, 2, 3, 8, 9, 16, 17,
51 :     10, 11, 4, 5, 6, 7, 15, 14,
52 :     13, 12, 19, 18, 24, 25, 32, 33,
53 :     26, 27, 20, 21, 22, 23, 28, 29,
54 :     30, 31, 34, 35, 40, 41, 48, 49,
55 :     42, 43, 36, 37, 38, 39, 44, 45,
56 :     46, 47, 50, 51, 56, 57, 58, 59,
57 :     52, 53, 54, 55, 60, 61, 62, 63},
58 : Isibaar 3
59 : edgomez 195 { // vertical_scan
60 :     0, 8, 16, 24, 1, 9, 2, 10,
61 :     17, 25, 32, 40, 48, 56, 57, 49,
62 :     41, 33, 26, 18, 3, 11, 4, 12,
63 :     19, 27, 34, 42, 50, 58, 35, 43,
64 :     51, 59, 20, 28, 5, 13, 6, 14,
65 :     21, 29, 36, 44, 52, 60, 37, 45,
66 :     53, 61, 22, 30, 7, 15, 23, 31,
67 :     38, 46, 54, 62, 39, 47, 55, 63}
68 : Isibaar 3 };
69 :    
70 : edgomez 195 #endif /* _ZIGZAG_H_ */

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