annotate src/audio/dart/SDL_dart.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 d910939febfa
children 782fd950bd46 a1b03ba2fcd0
rev   line source
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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
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24 #ifndef _SDL_lowaudio_h
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25 #define _SDL_lowaudio_h
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26
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27 #define INCL_TYPES
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28 #define INCL_DOSSEMAPHORES
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29 #define INCL_DOSRESOURCES
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30 #define INCL_DOSMISC
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31 #define INCL_DOSERRORS
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32
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33 #define INCL_OS2MM
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34 #define INCL_MMIOOS2
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35 #define INCL_MCIOS2
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36 #include <os2.h>
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37 #include <os2me.h> // DART stuff and MMIO stuff
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38
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39 #include "../SDL_sysaudio.h"
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40
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41 /* Hidden "this" pointer for the audio functions */
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42 #define _THIS SDL_AudioDevice *_this
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43
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44 /* The DirectSound objects */
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45 struct SDL_PrivateAudioData
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46 {
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47 int iCurrDeviceOrd;
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48 int iCurrFreq;
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49 int iCurrBits;
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50 int iCurrChannels;
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51 int iCurrNumBufs;
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52 int iCurrBufSize;
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53
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54 int iLastPlayedBuf;
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55 int iNextFreeBuffer;
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56
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57 MCI_BUFFER_PARMS BufferParms; // Sound buffer parameters
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58 MCI_MIX_BUFFER *pMixBuffers; // Sound buffers
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59 MCI_MIXSETUP_PARMS MixSetupParms; // Mixer setup parameters
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60 HEV hevAudioBufferPlayed; // Event semaphore to indicate that an audio buffer has been played by DART
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61 };
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62
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63 #endif /* _SDL_lowaudio_h */