Mercurial > sdl-ios-xcode
annotate src/audio/SDL_mixer_MMX_VC.h @ 4001:6831b8723a85 SDL-1.2
Don't initialize the audio buffer passed to the application's audio callback,
since they are expected to entirely fill it with data or silence.
For legacy apps that might expect the buffer to already have silence and thus
may not fill the buffer in the callback, there's an environment variable to
expose the old behaviour.
Fixes Bugzilla #416.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Thu, 05 Jul 2007 02:24:36 +0000 |
| parents | dc6b59e925a2 |
| children | 782fd950bd46 c121d94672cb a1b03ba2fcd0 |
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1 /* |
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2 SDL - Simple DirectMedia Layer |
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3 Copyright (C) 1997-2006 Sam Lantinga |
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4 |
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5 This library is free software; you can redistribute it and/or |
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6 modify it under the terms of the GNU Lesser General Public |
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7 License as published by the Free Software Foundation; either |
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8 version 2.1 of the License, or (at your option) any later version. |
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9 |
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10 This library is distributed in the hope that it will be useful, |
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 Lesser General Public License for more details. |
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14 |
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15 You should have received a copy of the GNU Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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18 |
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19 Sam Lantinga |
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20 slouken@libsdl.org |
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21 */ |
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22 #include "SDL_config.h" |
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23 |
| 1444 | 24 |
| 25 #if ((defined(_MSC_VER) && defined(_M_IX86)) || defined(__WATCOMC__)) && defined(SDL_ASSEMBLY_ROUTINES) | |
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26 /* headers for MMX assembler version of SDL_MixAudio |
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27 Copyright 2002 Stephane Marchesin (stephane.marchesin@wanadoo.fr) |
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28 Converted to Intel ASM notation by Cth |
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29 This code is licensed under the LGPL (see COPYING for details) |
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30 |
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31 Assumes buffer size in bytes is a multiple of 16 |
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32 Assumes SDL_MIX_MAXVOLUME = 128 |
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Sam Lantinga <slouken@libsdl.org>
parents:
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33 */ |
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Cth converted the MMX audio mixing routines to VC++ syntax
Sam Lantinga <slouken@libsdl.org>
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34 void SDL_MixAudio_MMX_S16_VC(char* ,char* ,unsigned int ,int ); |
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64fe373be3dc
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Sam Lantinga <slouken@libsdl.org>
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35 void SDL_MixAudio_MMX_S8_VC(char* ,char* ,unsigned int ,int ); |
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Sam Lantinga <slouken@libsdl.org>
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36 #endif |