--- idct.c 2002/06/12 20:38:40 1.2 +++ idct.c 2002/09/10 20:38:24 1.3 @@ -1,42 +1,35 @@ -/* idct.c, inverse fast discrete cosine transform */ - -/* Copyright (C) 1996, MPEG Software Simulation Group. All Rights Reserved. */ - -/* - * Disclaimer of Warranty +/***************************************************************************** * - * These software programs are available to the user without any license fee or - * royalty on an "as is" basis. The MPEG Software Simulation Group disclaims - * any and all warranties, whether express, implied, or statuary, including any - * implied warranties or merchantability or of fitness for a particular - * purpose. In no event shall the copyright-holder be liable for any - * incidental, punitive, or consequential damages of any kind whatsoever - * arising from the use of these programs. - * - * This disclaimer of warranty extends to the user of these programs and user's - * customers, employees, agents, transferees, successors, and assigns. - * - * The MPEG Software Simulation Group does not represent or warrant that the - * programs furnished hereunder are free of infringement of any third-party - * patents. - * - * Commercial implementations of MPEG-1 and MPEG-2 video, including shareware, - * are subject to royalty fees to patent holders. Many of these patents are - * general enough such that they are unavoidable regardless of implementation - * design. - * - * MPEG2AVI - * -------- - * v0.16B33 renamed the initialization function to init_idct_int32() - * v0.16B32 removed the unused idct_row() and idct_col() functions - * v0.16B3 changed var declarations to static, to enforce data align - * v0.16B22 idct_FAST() renamed to idct_int32() - * also merged idct_FAST() into a single function, to help VC++ - * optimize it. - * - * v0.14 changed int to long, to avoid confusion when compiling on x86 - * platform ( in VC++ "int" -> 32bits ) - */ + * XVID MPEG-4 VIDEO CODEC + * - inverse fast disrete cosine transformation - integer C version + * + * These routines are from Independent JPEG Group's free JPEG software + * Copyright (C) 1991-1998, Thomas G. Lane (see the file README.IJG) + * + * This program is an implementation of a part of one or more MPEG-4 + * Video tools as specified in ISO/IEC 14496-2 standard. Those intending + * to use this software module in hardware or software products are + * advised that its use may infringe existing patents or copyrights, and + * any such use would be at such party's own risk. The original + * developer of this software module and his/her company, and subsequent + * editors and their companies, will have no liability for use of this + * software or modifications or derivatives thereof. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + *************************************************************************/ /**********************************************************/ /* inverse two dimensional DCT, Chen-Wang algorithm */ @@ -52,7 +45,6 @@ /* this code assumes >> to be a two's-complement arithmetic */ /* right shift: (-2)>>1 == -1 , (-3)>>1 == -2 */ -//#include #include "idct.h" #define W1 2841 /* 2048*sqrt(2)*cos(1*pi/16) */