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annotate src/audio/mint/SDL_mintaudio_stfa.h @ 4355:9b464226e541 SDL-1.2

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Fixed bug #855 Ludwig Nussel 2009-10-18 06:31:52 PDT an mprotect call was added to fix bug 528. However that results in a buffer that allows writing and code execution. Ie the no-execute security features of modern operating systems are defeated this way. Two mprotect calls are needed. One to make the buffer executable but not writeable when done and another one to make the buffer writeable again if the content needs to be changed.
author Sam Lantinga <slouken@libsdl.org>
date Sun, 18 Oct 2009 17:31:37 +0000
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2009 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 */