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/***************************************************************************** |
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* |
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* XVID MPEG-4 VIDEO CODEC |
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* - zigzag dct block scanning - |
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* |
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* Copyright(C) 2001-2002 Michael Militzer <isibaar@xvid.org> |
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* |
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* This program is an implementation of a part of one or more MPEG-4 |
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* Video tools as specified in ISO/IEC 14496-2 standard. Those intending |
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* to use this software module in hardware or software products are |
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* advised that its use may infringe existing patents or copyrights, and |
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* any such use would be at such party's own risk. The original |
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* developer of this software module and his/her company, and subsequent |
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* editors and their companies, will have no liability for use of this |
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* software or modifications or derivatives thereof. |
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* |
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* This program is free software ; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation ; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY ; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program ; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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* |
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* $Id: zigzag.h,v 1.3 2002-09-10 22:54:23 edgomez Exp $ |
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* |
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****************************************************************************/ |
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#ifndef _ZIGZAG_H_ |
#ifndef _ZIGZAG_H_ |
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#define _ZIGZAG_H_ |
#define _ZIGZAG_H_ |
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static const uint16_t scan_tables[3][64] = |
static const uint16_t scan_tables[3][64] = { |
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{ |
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{ // zig_zag_scan |
{ // zig_zag_scan |
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0, 1, 8, 16, 9, 2, 3, 10, |
0, 1, 8, 16, 9, 2, 3, 10, |
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17, 24, 32, 25, 18, 11, 4, 5, |
17, 24, 32, 25, 18, 11, 4, 5, |
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35, 42, 49, 56, 57, 50, 43, 36, |
35, 42, 49, 56, 57, 50, 43, 36, |
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29, 22, 15, 23, 30, 37, 44, 51, |
29, 22, 15, 23, 30, 37, 44, 51, |
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58, 59, 52, 45, 38, 31, 39, 46, |
58, 59, 52, 45, 38, 31, 39, 46, |
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53, 60, 61, 54, 47, 55, 62, 63 |
53, 60, 61, 54, 47, 55, 62, 63}, |
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}, |
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{ // horizontal_scan |
{ // horizontal_scan |
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0, 1, 2, 3, 8, 9, 16, 17, |
0, 1, 2, 3, 8, 9, 16, 17, |
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30, 31, 34, 35, 40, 41, 48, 49, |
30, 31, 34, 35, 40, 41, 48, 49, |
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42, 43, 36, 37, 38, 39, 44, 45, |
42, 43, 36, 37, 38, 39, 44, 45, |
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46, 47, 50, 51, 56, 57, 58, 59, |
46, 47, 50, 51, 56, 57, 58, 59, |
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52, 53, 54, 55, 60, 61, 62, 63 |
52, 53, 54, 55, 60, 61, 62, 63}, |
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}, |
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{ // vertical_scan |
{ // vertical_scan |
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0, 8, 16, 24, 1, 9, 2, 10, |
0, 8, 16, 24, 1, 9, 2, 10, |
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51, 59, 20, 28, 5, 13, 6, 14, |
51, 59, 20, 28, 5, 13, 6, 14, |
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21, 29, 36, 44, 52, 60, 37, 45, |
21, 29, 36, 44, 52, 60, 37, 45, |
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53, 61, 22, 30, 7, 15, 23, 31, |
53, 61, 22, 30, 7, 15, 23, 31, |
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38, 46, 54, 62, 39, 47, 55, 63 |
38, 46, 54, 62, 39, 47, 55, 63} |
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} |
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}; |
}; |
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#endif /* _ZIGZAG_H_ */ |
#endif /* _ZIGZAG_H_ */ |