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| 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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