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annotate src/audio/mint/SDL_mintaudio.c @ 753:b14fdadd8311

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Date: Thu, 4 Dec 2003 07:48:40 +0200 From: "Mike Gorchak" Subject: SDL/QNX6 new patch Here in attachment my patch for the SDL/QNX6 again :) It contain non-crtitical/cosmetic fixes: 1. Fixed window centering at other than the first consoles. 2. Fixed window centering algorithm in case when window height or width are greater than the desktop resolution. 3. Fixed window positioning on other than the first consoles. 4. Fixed occasional input focus lost when switching to fullscreen. 5. Removed the Photon's default chroma color for the overlays, added RGB(12, 6, 12) color instead (very dark pink). 6. Added more checks to the YUV overlay code (fixed crashes during resolution mode switches). 7. Added support for Enter/Backspace keys in unicode mode (used by Maelstrom and by other games). 8. Fixed window restore/maximize function. It works, finally.
author Sam Lantinga <slouken@libsdl.org>
date Wed, 10 Dec 2003 12:35:56 +0000
parents c4803992e09c
children b8d311d90021
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 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 Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 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 Library 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 Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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
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23 /*
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24 Audio interrupt variables and callback function
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25
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26 Patrice Mandin
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27 */
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28
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29 #include <string.h>
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30
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31 #include "SDL_types.h"
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32 #include "SDL_audio.h"
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33
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34 #include "SDL_mintaudio.h"
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35 #include "SDL_mintaudio_stfa.h"
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36
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37 /* The audio device */
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38
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39 SDL_AudioDevice *SDL_MintAudio_device;
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40 Uint8 *SDL_MintAudio_audiobuf[2]; /* Pointers to buffers */
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41 unsigned long SDL_MintAudio_audiosize; /* Length of audio buffer=spec->size */
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42 unsigned short SDL_MintAudio_numbuf; /* Buffer to play */
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43 unsigned short SDL_MintAudio_mutex;
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44 cookie_stfa_t *SDL_MintAudio_stfa;
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45
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46 /* The callback function, called by each driver whenever needed */
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47
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48 void SDL_MintAudio_Callback(void)
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49 {
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50 Uint8 *buffer;
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51
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52 buffer = SDL_MintAudio_audiobuf[SDL_MintAudio_numbuf];
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53 memset(buffer, SDL_MintAudio_device->spec.silence, SDL_MintAudio_device->spec.size);
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54
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55 if ( ! SDL_MintAudio_device->paused ) {
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56 if ( SDL_MintAudio_device->convert.needed ) {
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57 SDL_MintAudio_device->spec.callback(SDL_MintAudio_device->spec.userdata,
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58 (Uint8 *)SDL_MintAudio_device->convert.buf,SDL_MintAudio_device->convert.len);
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59 SDL_ConvertAudio(&SDL_MintAudio_device->convert);
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60 memcpy(buffer, SDL_MintAudio_device->convert.buf, SDL_MintAudio_device->convert.len_cvt);
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61 } else {
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62 SDL_MintAudio_device->spec.callback(SDL_MintAudio_device->spec.userdata, buffer, SDL_MintAudio_device->spec.size);
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63 }
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64 }
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65 }
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66
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67 /* Simple function to search for the nearest frequency */
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68 int SDL_MintAudio_SearchFrequency(_THIS, int falcon_codec, int desired_freq)
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69 {
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70 int i;
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71
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72 /* Only 1 freq ? */
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73 if (MINTAUDIO_nfreq==1) {
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74 return(MINTAUDIO_sfreq);
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75 }
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77 /* Check the array */
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78 for (i=MINTAUDIO_sfreq; i<MINTAUDIO_nfreq-1; i++) {
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79 /* Remove unusable falcon codec frequencies */
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80 if (falcon_codec) {
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81 if ((i==6) || (i==8) || (i==10)) {
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82 continue;
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83 }
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84 }
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86 if (desired_freq >= ((MINTAUDIO_hardfreq[i]+MINTAUDIO_hardfreq[i+1])>>1)) {
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87 return i;
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88 }
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89 }
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91 /* Not in the array, give the latest */
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92 return MINTAUDIO_nfreq-1;
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93 }