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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 : | edgomez | 655 | * This file is part of XviD, a free MPEG-4 video encoder/decoder |
9 : | edgomez | 470 | * |
10 : | edgomez | 655 | * 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 : | edgomez | 470 | * (at your option) any later version. |
14 : | * | ||
15 : | * This program is distributed in the hope that it will be useful, | ||
16 : | edgomez | 655 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
17 : | edgomez | 470 | * 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 : | edgomez | 655 | * along with this program; if not, write to the Free Software |
22 : | edgomez | 470 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
23 : | * | ||
24 : | edgomez | 655 | * Under section 8 of the GNU General Public License, the copyright |
25 : | * holders of XVID explicitly forbid distribution in the following | ||
26 : | * countries: | ||
27 : | edgomez | 470 | * |
28 : | edgomez | 655 | * - 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 : | edgomez | 470 | ****************************************************************************/ |
56 : | |||
57 : | Isibaar | 3 | #ifndef _ZIGZAG_H_ |
58 : | #define _ZIGZAG_H_ | ||
59 : | |||
60 : | edgomez | 195 | static const uint16_t scan_tables[3][64] = { |
61 : | { // zig_zag_scan | ||
62 : | 0, 1, 8, 16, 9, 2, 3, 10, | ||
63 : | 17, 24, 32, 25, 18, 11, 4, 5, | ||
64 : | 12, 19, 26, 33, 40, 48, 41, 34, | ||
65 : | 27, 20, 13, 6, 7, 14, 21, 28, | ||
66 : | 35, 42, 49, 56, 57, 50, 43, 36, | ||
67 : | 29, 22, 15, 23, 30, 37, 44, 51, | ||
68 : | 58, 59, 52, 45, 38, 31, 39, 46, | ||
69 : | 53, 60, 61, 54, 47, 55, 62, 63}, | ||
70 : | Isibaar | 3 | |
71 : | edgomez | 195 | { // horizontal_scan |
72 : | 0, 1, 2, 3, 8, 9, 16, 17, | ||
73 : | 10, 11, 4, 5, 6, 7, 15, 14, | ||
74 : | 13, 12, 19, 18, 24, 25, 32, 33, | ||
75 : | 26, 27, 20, 21, 22, 23, 28, 29, | ||
76 : | 30, 31, 34, 35, 40, 41, 48, 49, | ||
77 : | 42, 43, 36, 37, 38, 39, 44, 45, | ||
78 : | 46, 47, 50, 51, 56, 57, 58, 59, | ||
79 : | 52, 53, 54, 55, 60, 61, 62, 63}, | ||
80 : | Isibaar | 3 | |
81 : | edgomez | 195 | { // vertical_scan |
82 : | 0, 8, 16, 24, 1, 9, 2, 10, | ||
83 : | 17, 25, 32, 40, 48, 56, 57, 49, | ||
84 : | 41, 33, 26, 18, 3, 11, 4, 12, | ||
85 : | 19, 27, 34, 42, 50, 58, 35, 43, | ||
86 : | 51, 59, 20, 28, 5, 13, 6, 14, | ||
87 : | 21, 29, 36, 44, 52, 60, 37, 45, | ||
88 : | 53, 61, 22, 30, 7, 15, 23, 31, | ||
89 : | 38, 46, 54, 62, 39, 47, 55, 63} | ||
90 : | Isibaar | 3 | }; |
91 : | |||
92 : | edgomez | 195 | #endif /* _ZIGZAG_H_ */ |
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