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annotate src/audio/mint/SDL_mintaudio_stfa.h @ 4001:6831b8723a85 SDL-1.2

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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
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1 /*
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2 SDL - Simple DirectMedia Layer
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b8d311d90021 Updated copyright information for 2004 (Happy New Year!)
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3 Copyright (C) 1997-2004 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 #include "SDL_config.h"
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23
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24 /*
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25 STFA control structure
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26
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27 Patrice Mandin
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28 */
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29
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30 #ifndef _SDL_mintaudio_stfa_h
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31 #define _SDL_mintaudio_stfa_h
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32
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33 /*--- Defines ---*/
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34
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35 #define C_STFA 0x53544641L /* Sound treiber für atari (seb/The removers) */
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36
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37 #define STFA_PLAY_ENABLE (1<<0)
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38 #define STFA_PLAY_DISABLE (0<<0)
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39 #define STFA_PLAY_REPEAT (1<<1)
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40 #define STFA_PLAY_SINGLE (0<<1)
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41
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42 #define STFA_FORMAT_SIGNED (1<<15)
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43 #define STFA_FORMAT_UNSIGNED (0<<15)
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44 #define STFA_FORMAT_STEREO (1<<14)
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45 #define STFA_FORMAT_MONO (0<<14)
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46 #define STFA_FORMAT_16BIT (1<<13)
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47 #define STFA_FORMAT_8BIT (0<<13)
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48 #define STFA_FORMAT_LITENDIAN (1<<9)
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49 #define STFA_FORMAT_BIGENDIAN (0<<9)
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50 #define STFA_FORMAT_FREQ_MASK 0x0f
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51 enum {
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52 STFA_FORMAT_F4995=0,
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53 STFA_FORMAT_F6269,
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54 STFA_FORMAT_F7493,
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55 STFA_FORMAT_F8192,
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56
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57 STFA_FORMAT_F9830,
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58 STFA_FORMAT_F10971,
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59 STFA_FORMAT_F12538,
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60 STFA_FORMAT_F14985,
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61
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62 STFA_FORMAT_F16384,
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63 STFA_FORMAT_F19819,
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64 STFA_FORMAT_F21943,
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65 STFA_FORMAT_F24576,
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66
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67 STFA_FORMAT_F30720,
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68 STFA_FORMAT_F32336,
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69 STFA_FORMAT_F43885,
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70 STFA_FORMAT_F49152
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71 };
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72
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73 /*--- Types ---*/
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74
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75 typedef struct {
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76 unsigned short sound_enable;
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77 unsigned short sound_control;
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78 unsigned short sound_output;
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79 unsigned long sound_start;
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80 unsigned long sound_current;
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81 unsigned long sound_end;
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82 unsigned short version;
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83 void *old_vbl;
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84 void *old_timera;
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85 unsigned long old_mfp_status;
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86 void *new_vbl;
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87 void *drivers_list;
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88 void *play_stop;
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89 unsigned short frequency;
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90 void *set_frequency;
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91
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92 unsigned short frequency_threshold;
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93 unsigned short *custom_freq_table;
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94 unsigned short stfa_on_off;
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95 void *new_drivers_list;
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96 unsigned long old_bit_2_of_cookie_snd;
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97 void (*stfa_it)(void);
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98 } cookie_stfa_t __attribute__((packed));
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99
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100 #endif /* _SDL_mintaudio_stfa_h */