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annotate include/SDL_cdrom.h @ 1650:ee4f2d77206f
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| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sat, 22 Apr 2006 19:50:23 +0000 |
| parents | c71e05b4dc2e |
| children | 782fd950bd46 c121d94672cb a1b03ba2fcd0 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
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3 Copyright (C) 1997-2006 Sam Lantinga |
| 0 | 4 |
| 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 |
| 0 | 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. |
| 0 | 9 |
| 10 This library is distributed in the hope that it will be useful, | |
| 11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
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13 Lesser General Public License for more details. |
| 0 | 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 |
| 0 | 18 |
| 19 Sam Lantinga | |
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20 slouken@libsdl.org |
| 0 | 21 */ |
| 22 | |
| 23 /* This is the CD-audio control API for Simple DirectMedia Layer */ | |
| 24 | |
| 25 #ifndef _SDL_cdrom_h | |
| 26 #define _SDL_cdrom_h | |
| 27 | |
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28 #include "SDL_stdinc.h" |
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29 #include "SDL_error.h" |
| 0 | 30 |
| 31 #include "begin_code.h" | |
| 32 /* Set up for C function definitions, even when using C++ */ | |
| 33 #ifdef __cplusplus | |
| 34 extern "C" { | |
| 35 #endif | |
| 36 | |
| 37 /* In order to use these functions, SDL_Init() must have been called | |
| 38 with the SDL_INIT_CDROM flag. This causes SDL to scan the system | |
| 39 for CD-ROM drives, and load appropriate drivers. | |
| 40 */ | |
| 41 | |
| 42 /* The maximum number of CD-ROM tracks on a disk */ | |
| 43 #define SDL_MAX_TRACKS 99 | |
| 44 | |
| 45 /* The types of CD-ROM track possible */ | |
| 46 #define SDL_AUDIO_TRACK 0x00 | |
| 47 #define SDL_DATA_TRACK 0x04 | |
| 48 | |
| 49 /* The possible states which a CD-ROM drive can be in. */ | |
| 50 typedef enum { | |
| 51 CD_TRAYEMPTY, | |
| 52 CD_STOPPED, | |
| 53 CD_PLAYING, | |
| 54 CD_PAUSED, | |
| 55 CD_ERROR = -1 | |
| 56 } CDstatus; | |
| 57 | |
| 58 /* Given a status, returns true if there's a disk in the drive */ | |
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59 #define CD_INDRIVE(status) ((int)(status) > 0) |
| 0 | 60 |
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61 typedef struct SDL_CDtrack { |
| 0 | 62 Uint8 id; /* Track number */ |
| 63 Uint8 type; /* Data or audio track */ | |
| 64 Uint16 unused; | |
| 65 Uint32 length; /* Length, in frames, of this track */ | |
| 66 Uint32 offset; /* Offset, in frames, from start of disk */ | |
| 67 } SDL_CDtrack; | |
| 68 | |
| 69 /* This structure is only current as of the last call to SDL_CDStatus() */ | |
| 70 typedef struct SDL_CD { | |
| 71 int id; /* Private drive identifier */ | |
| 72 CDstatus status; /* Current drive status */ | |
| 73 | |
| 74 /* The rest of this structure is only valid if there's a CD in drive */ | |
| 75 int numtracks; /* Number of tracks on disk */ | |
| 76 int cur_track; /* Current track position */ | |
| 77 int cur_frame; /* Current frame offset within current track */ | |
| 78 SDL_CDtrack track[SDL_MAX_TRACKS+1]; | |
| 79 } SDL_CD; | |
| 80 | |
| 81 /* Conversion functions from frames to Minute/Second/Frames and vice versa */ | |
| 82 #define CD_FPS 75 | |
| 83 #define FRAMES_TO_MSF(f, M,S,F) { \ | |
| 84 int value = f; \ | |
| 85 *(F) = value%CD_FPS; \ | |
| 86 value /= CD_FPS; \ | |
| 87 *(S) = value%60; \ | |
| 88 value /= 60; \ | |
| 89 *(M) = value; \ | |
| 90 } | |
| 91 #define MSF_TO_FRAMES(M, S, F) ((M)*60*CD_FPS+(S)*CD_FPS+(F)) | |
| 92 | |
| 93 /* CD-audio API functions: */ | |
| 94 | |
| 95 /* Returns the number of CD-ROM drives on the system, or -1 if | |
| 96 SDL_Init() has not been called with the SDL_INIT_CDROM flag. | |
| 97 */ | |
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98 extern DECLSPEC int SDLCALL SDL_CDNumDrives(void); |
| 0 | 99 |
| 100 /* Returns a human-readable, system-dependent identifier for the CD-ROM. | |
| 101 Example: | |
| 102 "/dev/cdrom" | |
| 103 "E:" | |
| 104 "/dev/disk/ide/1/master" | |
| 105 */ | |
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106 extern DECLSPEC const char * SDLCALL SDL_CDName(int drive); |
| 0 | 107 |
| 108 /* Opens a CD-ROM drive for access. It returns a drive handle on success, | |
| 109 or NULL if the drive was invalid or busy. This newly opened CD-ROM | |
| 110 becomes the default CD used when other CD functions are passed a NULL | |
| 111 CD-ROM handle. | |
| 112 Drives are numbered starting with 0. Drive 0 is the system default CD-ROM. | |
| 113 */ | |
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114 extern DECLSPEC SDL_CD * SDLCALL SDL_CDOpen(int drive); |
| 0 | 115 |
| 116 /* This function returns the current status of the given drive. | |
| 117 If the drive has a CD in it, the table of contents of the CD and current | |
| 118 play position of the CD will be stored in the SDL_CD structure. | |
| 119 */ | |
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120 extern DECLSPEC CDstatus SDLCALL SDL_CDStatus(SDL_CD *cdrom); |
| 0 | 121 |
| 122 /* Play the given CD starting at 'start_track' and 'start_frame' for 'ntracks' | |
| 123 tracks and 'nframes' frames. If both 'ntrack' and 'nframe' are 0, play | |
| 124 until the end of the CD. This function will skip data tracks. | |
| 125 This function should only be called after calling SDL_CDStatus() to | |
| 126 get track information about the CD. | |
| 127 For example: | |
| 128 // Play entire CD: | |
| 129 if ( CD_INDRIVE(SDL_CDStatus(cdrom)) ) | |
| 130 SDL_CDPlayTracks(cdrom, 0, 0, 0, 0); | |
| 131 // Play last track: | |
| 132 if ( CD_INDRIVE(SDL_CDStatus(cdrom)) ) { | |
| 133 SDL_CDPlayTracks(cdrom, cdrom->numtracks-1, 0, 0, 0); | |
| 134 } | |
| 135 // Play first and second track and 10 seconds of third track: | |
| 136 if ( CD_INDRIVE(SDL_CDStatus(cdrom)) ) | |
| 137 SDL_CDPlayTracks(cdrom, 0, 0, 2, 10); | |
| 138 | |
| 139 This function returns 0, or -1 if there was an error. | |
| 140 */ | |
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141 extern DECLSPEC int SDLCALL SDL_CDPlayTracks(SDL_CD *cdrom, |
| 0 | 142 int start_track, int start_frame, int ntracks, int nframes); |
| 143 | |
| 144 /* Play the given CD starting at 'start' frame for 'length' frames. | |
| 145 It returns 0, or -1 if there was an error. | |
| 146 */ | |
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147 extern DECLSPEC int SDLCALL SDL_CDPlay(SDL_CD *cdrom, int start, int length); |
| 0 | 148 |
| 149 /* Pause play -- returns 0, or -1 on error */ | |
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150 extern DECLSPEC int SDLCALL SDL_CDPause(SDL_CD *cdrom); |
| 0 | 151 |
| 152 /* Resume play -- returns 0, or -1 on error */ | |
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153 extern DECLSPEC int SDLCALL SDL_CDResume(SDL_CD *cdrom); |
| 0 | 154 |
| 155 /* Stop play -- returns 0, or -1 on error */ | |
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156 extern DECLSPEC int SDLCALL SDL_CDStop(SDL_CD *cdrom); |
| 0 | 157 |
| 158 /* Eject CD-ROM -- returns 0, or -1 on error */ | |
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159 extern DECLSPEC int SDLCALL SDL_CDEject(SDL_CD *cdrom); |
| 0 | 160 |
| 161 /* Closes the handle for the CD-ROM drive */ | |
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162 extern DECLSPEC void SDLCALL SDL_CDClose(SDL_CD *cdrom); |
| 0 | 163 |
| 164 | |
| 165 /* Ends C function definitions when using C++ */ | |
| 166 #ifdef __cplusplus | |
| 167 } | |
| 168 #endif | |
| 169 #include "close_code.h" | |
| 170 | |
| 171 #endif /* _SDL_video_h */ |