1 |
/***************************************************************************** |
/***************************************************************************** |
2 |
* |
* |
3 |
* XVID MPEG-4 VIDEO CODEC |
* XVID MPEG-4 VIDEO CODEC |
4 |
* - fast disrete cosine transformation - integer C version |
* - Forward DCT - |
5 |
* |
* |
6 |
* These routines are from Independent JPEG Group's free JPEG software |
* These routines are from Independent JPEG Group's free JPEG software |
7 |
* Copyright (C) 1991-1998, Thomas G. Lane (see the file README.IJG) |
* Copyright (C) 1991-1998, Thomas G. Lane (see the file README.IJG) |
8 |
* |
* |
9 |
* This file is part of XviD, a free MPEG-4 video encoder/decoder |
* This program is free software ; you can redistribute it and/or modify |
10 |
* |
* it under the terms of the GNU General Public License as published by |
|
* XviD is free software; you can redistribute it and/or modify it |
|
|
* under the terms of the GNU General Public License as published by |
|
11 |
* the Free Software Foundation; either version 2 of the License, or |
* the Free Software Foundation; either version 2 of the License, or |
12 |
* (at your option) any later version. |
* (at your option) any later version. |
13 |
* |
* |
20 |
* along with this program; if not, write to the Free Software |
* along with this program; if not, write to the Free Software |
21 |
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
22 |
* |
* |
|
* Under section 8 of the GNU General Public License, the copyright |
|
|
* holders of XVID explicitly forbid distribution in the following |
|
|
* countries: |
|
|
* |
|
|
* - Japan |
|
|
* - United States of America |
|
|
* |
|
|
* Linking XviD statically or dynamically with other modules is making a |
|
|
* combined work based on XviD. Thus, the terms and conditions of the |
|
|
* GNU General Public License cover the whole combination. |
|
|
* |
|
|
* As a special exception, the copyright holders of XviD give you |
|
|
* permission to link XviD with independent modules that communicate with |
|
|
* XviD solely through the VFW1.1 and DShow interfaces, regardless of the |
|
|
* license terms of these independent modules, and to copy and distribute |
|
|
* the resulting combined work under terms of your choice, provided that |
|
|
* every copy of the combined work is accompanied by a complete copy of |
|
|
* the source code of XviD (the version of XviD used to produce the |
|
|
* combined work), being distributed under the terms of the GNU General |
|
|
* Public License plus this exception. An independent module is a module |
|
|
* which is not derived from or based on XviD. |
|
|
* |
|
|
* Note that people who make modified versions of XviD are not obligated |
|
|
* to grant this special exception for their modified versions; it is |
|
|
* their choice whether to do so. The GNU General Public License gives |
|
|
* permission to release a modified version without this exception; this |
|
|
* exception also makes it possible to release a modified version which |
|
|
* carries forward this exception. |
|
|
* |
|
23 |
* $Id$ |
* $Id$ |
24 |
* |
* |
25 |
*************************************************************************/ |
****************************************************************************/ |
26 |
|
|
27 |
|
/* Copyright (C) 1996, MPEG Software Simulation Group. All Rights Reserved. */ |
28 |
|
|
29 |
|
/* |
30 |
|
* Disclaimer of Warranty |
31 |
|
* |
32 |
|
* These software programs are available to the user without any license fee or |
33 |
|
* royalty on an "as is" basis. The MPEG Software Simulation Group disclaims |
34 |
|
* any and all warranties, whether express, implied, or statuary, including any |
35 |
|
* implied warranties or merchantability or of fitness for a particular |
36 |
|
* purpose. In no event shall the copyright-holder be liable for any |
37 |
|
* incidental, punitive, or consequential damages of any kind whatsoever |
38 |
|
* arising from the use of these programs. |
39 |
|
* |
40 |
|
* This disclaimer of warranty extends to the user of these programs and user's |
41 |
|
* customers, employees, agents, transferees, successors, and assigns. |
42 |
|
* |
43 |
|
* The MPEG Software Simulation Group does not represent or warrant that the |
44 |
|
* programs furnished hereunder are free of infringement of any third-party |
45 |
|
* patents. |
46 |
|
* |
47 |
|
* Commercial implementations of MPEG-1 and MPEG-2 video, including shareware, |
48 |
|
* are subject to royalty fees to patent holders. Many of these patents are |
49 |
|
* general enough such that they are unavoidable regardless of implementation |
50 |
|
* design. |
51 |
|
* |
52 |
|
*/ |
53 |
|
|
54 |
/* This routine is a slow-but-accurate integer implementation of the |
/* This routine is a slow-but-accurate integer implementation of the |
55 |
* forward DCT (Discrete Cosine Transform). Taken from the IJG software |
* forward DCT (Discrete Cosine Transform). Taken from the IJG software |
134 |
#define FIX_2_562915447 ((int) 20995) /* FIX(2.562915447) */ |
#define FIX_2_562915447 ((int) 20995) /* FIX(2.562915447) */ |
135 |
#define FIX_3_072711026 ((int) 25172) /* FIX(3.072711026) */ |
#define FIX_3_072711026 ((int) 25172) /* FIX(3.072711026) */ |
136 |
|
|
137 |
// function pointer |
/* function pointer */ |
138 |
fdctFuncPtr fdct; |
fdctFuncPtr fdct; |
139 |
|
|
140 |
/* |
/* |