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Annotation of /xvidcore/src/utils/emms.c

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1 : edgomez 1.3 /*****************************************************************************
2 :     *
3 :     * XVID MPEG-4 VIDEO CODEC
4 :     * - emms C wrapper -
5 :     *
6 : edgomez 1.6 * Copyright(C) 2002 Michael Militzer <isibaar@xvid.org>
7 : edgomez 1.5 *
8 : edgomez 1.7 * This file is part of XviD, a free MPEG-4 video encoder/decoder
9 :     *
10 :     * XviD is free software; you can redistribute it and/or modify it
11 :     * under the terms of the GNU General Public License as published by
12 :     * the Free Software Foundation; either version 2 of the License, or
13 : edgomez 1.3 * (at your option) any later version.
14 :     *
15 :     * This program is distributed in the hope that it will be useful,
16 : edgomez 1.7 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 : edgomez 1.3 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 :     * GNU General Public License for more details.
19 :     *
20 :     * You should have received a copy of the GNU General Public License
21 : edgomez 1.7 * along with this program; if not, write to the Free Software
22 : edgomez 1.3 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 : edgomez 1.7 *
24 :     * Under section 8 of the GNU General Public License, the copyright
25 :     * holders of XVID explicitly forbid distribution in the following
26 :     * countries:
27 :     *
28 :     * - Japan
29 :     * - United States of America
30 :     *
31 :     * Linking XviD statically or dynamically with other modules is making a
32 :     * combined work based on XviD. Thus, the terms and conditions of the
33 :     * GNU General Public License cover the whole combination.
34 :     *
35 :     * As a special exception, the copyright holders of XviD give you
36 :     * permission to link XviD with independent modules that communicate with
37 :     * XviD solely through the VFW1.1 and DShow interfaces, regardless of the
38 :     * license terms of these independent modules, and to copy and distribute
39 :     * the resulting combined work under terms of your choice, provided that
40 :     * every copy of the combined work is accompanied by a complete copy of
41 :     * the source code of XviD (the version of XviD used to produce the
42 :     * combined work), being distributed under the terms of the GNU General
43 :     * Public License plus this exception. An independent module is a module
44 :     * which is not derived from or based on XviD.
45 :     *
46 :     * Note that people who make modified versions of XviD are not obligated
47 :     * to grant this special exception for their modified versions; it is
48 :     * their choice whether to do so. The GNU General Public License gives
49 :     * permission to release a modified version without this exception; this
50 :     * exception also makes it possible to release a modified version which
51 :     * carries forward this exception.
52 :     *
53 :     * $Id$
54 : edgomez 1.3 *
55 :     ****************************************************************************/
56 :    
57 : Isibaar 1.1 #include "emms.h"
58 :     #include "../portab.h"
59 :    
60 : edgomez 1.3 /*****************************************************************************
61 :     * Library data, declared here
62 :     ****************************************************************************/
63 :    
64 : Isibaar 1.1 emmsFuncPtr emms;
65 : edgomez 1.3
66 :    
67 :     /*****************************************************************************
68 :     * emms functions
69 :     *
70 :     * emms functions are used to restored the fpu context after mmx operations
71 :     * because mmx and fpu share their registers/context (??? need to be confirmed)
72 :     *
73 :     ****************************************************************************/
74 :    
75 :     /* The no op wrapper for non MMX platforms */
76 : edgomez 1.2 void
77 :     emms_c()
78 :     {
79 :     }
80 :    
81 : edgomez 1.3 /* The real mmx emms wrapper */
82 : edgomez 1.2 void
83 :     emms_mmx()
84 :     {
85 : edgomez 1.3 /* the EMMS macro is defined according to the compiler in portab.h */
86 : edgomez 1.2 EMMS();
87 : edgomez 1.3
88 : edgomez 1.2 }

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