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annotate src/audio/dummy/SDL_dummyaudio.c @ 3798:c8b3d3d13ed1 SDL-ryan-multiple-audio-device

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Audio bootstraps can now specify that a driver is only to be used if explicitly requested (for things like the "disk" driver that is always available but you would never want to default to using). Trimmed out code that can be handled by stubs in the core. The "dummy" driver is pretty damned small now. :)
author Ryan C. Gordon <icculus@icculus.org>
date Wed, 04 Oct 2006 21:27:53 +0000
parents b19680c84cdf
children 7852b5b78af5
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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60620d71e324 Corrected dummy audio callback firing to be realistic, cleaned up tabs.
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22 This file written by Ryan C. Gordon (icculus@icculus.org)
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23 */
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24 #include "SDL_config.h"
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25
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38c1eb6b0083 By default all the real targets have dummy audio/video and disk audio.
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26 /* Output audio to nowhere... */
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27
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28 #include "SDL_rwops.h"
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29 #include "SDL_timer.h"
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30 #include "SDL_audio.h"
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31 #include "../SDL_audiomem.h"
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32 #include "../SDL_audio_c.h"
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33 #include "../SDL_audiodev_c.h"
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34 #include "SDL_dummyaudio.h"
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35
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36 /* The tag name used by DUMMY audio */
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37 #define DUMMYAUD_DRIVER_NAME "dummy"
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38
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39 /* Audio driver functions */
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40 static int DUMMYAUD_OpenDevice(_THIS, const char *devname, int iscapture);
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41 static void DUMMYAUD_WaitDevice(_THIS);
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42 static void DUMMYAUD_PlayDevice(_THIS);
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43 static Uint8 *DUMMYAUD_GetDeviceBuf(_THIS);
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44 static void DUMMYAUD_CloseDevice(_THIS);
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45
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46 /* Audio driver bootstrap functions */
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47 static int
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48 DUMMYAUD_Available(void)
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49 {
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50 return 1; /* always available. */
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51 }
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52
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53 static int
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54 DUMMYAUD_Init(SDL_AudioDriverImpl *impl)
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55 {
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56 /* Set the function pointers */
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57 impl->OpenDevice = DUMMYAUD_OpenDevice;
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58 impl->OnlyHasDefaultOutputDevice = 1;
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59
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60 return 1;
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61 }
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62
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63 AudioBootStrap DUMMYAUD_bootstrap = {
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64 DUMMYAUD_DRIVER_NAME, "SDL dummy audio driver",
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65 DUMMYAUD_Available, DUMMYAUD_Init, 1
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66 };
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67
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68 static int
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69 DUMMYAUD_OpenDevice(_THIS, const char *devname, int iscapture)
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70 {
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71 return 1; /* always succeeds. */
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72 }
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73
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74 /* vi: set ts=4 sw=4 expandtab: */