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* |
* |
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* XVID MPEG-4 VIDEO CODEC |
* XVID MPEG-4 VIDEO CODEC |
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* - fast disrete cosine transformation - integer C version |
* - Forward DCT - |
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* |
* |
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* These routines are from Independent JPEG Group's free JPEG software |
* These routines are from Independent JPEG Group's free JPEG software |
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* Copyright (C) 1991-1998, Thomas G. Lane (see the file README.IJG) |
* Copyright (C) 1991-1998, Thomas G. Lane (see the file README.IJG) |
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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 |
* 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 |
* 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 |
* the Free Software Foundation; either version 2 of the License, or |
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* along with this program; if not, write to the Free Software |
* 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 |
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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* |
* |
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*************************************************************************/ |
* $Id$ |
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* |
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****************************************************************************/ |
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/* Copyright (C) 1996, MPEG Software Simulation Group. All Rights Reserved. */ |
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/* |
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* Disclaimer of Warranty |
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* |
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* These software programs are available to the user without any license fee or |
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* royalty on an "as is" basis. The MPEG Software Simulation Group disclaims |
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* any and all warranties, whether express, implied, or statuary, including any |
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* implied warranties or merchantability or of fitness for a particular |
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* purpose. In no event shall the copyright-holder be liable for any |
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* incidental, punitive, or consequential damages of any kind whatsoever |
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* arising from the use of these programs. |
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* |
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* This disclaimer of warranty extends to the user of these programs and user's |
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* customers, employees, agents, transferees, successors, and assigns. |
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* |
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* The MPEG Software Simulation Group does not represent or warrant that the |
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* programs furnished hereunder are free of infringement of any third-party |
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* patents. |
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* |
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* Commercial implementations of MPEG-1 and MPEG-2 video, including shareware, |
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* are subject to royalty fees to patent holders. Many of these patents are |
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* general enough such that they are unavoidable regardless of implementation |
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* design. |
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* |
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*/ |
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/* This routine is a slow-but-accurate integer implementation of the |
/* This routine is a slow-but-accurate integer implementation of the |
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* forward DCT (Discrete Cosine Transform). Taken from the IJG software |
* forward DCT (Discrete Cosine Transform). Taken from the IJG software |
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#define FIX_2_562915447 ((int) 20995) /* FIX(2.562915447) */ |
#define FIX_2_562915447 ((int) 20995) /* FIX(2.562915447) */ |
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#define FIX_3_072711026 ((int) 25172) /* FIX(3.072711026) */ |
#define FIX_3_072711026 ((int) 25172) /* FIX(3.072711026) */ |
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// function pointer |
/* function pointer */ |
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fdctFuncPtr fdct; |
fdctFuncPtr fdct; |
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/* |
/* |