2 SDL - Simple DirectMedia Layer
3 Copyright (C) 1997-2009 Sam Lantinga
5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
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
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with this library; if not, write to the Free Software
17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
25 * This is the CD-audio control API for Simple DirectMedia Layer
31 #include "SDL_stdinc.h"
32 #include "SDL_error.h"
34 #include "begin_code.h"
35 /* Set up for C function definitions, even when using C++ */
42 * In order to use these functions, SDL_Init() must have been called
43 * with the SDL_INIT_CDROM flag. This causes SDL to scan the system
44 * for CD-ROM drives, and load appropriate drivers.
47 /** The maximum number of CD-ROM tracks on a disk */
48 #define SDL_MAX_TRACKS 99
51 * The types of CD-ROM track possible
54 #define SDL_AUDIO_TRACK 0x00
55 #define SDL_DATA_TRACK 0x04
58 /** The possible states which a CD-ROM drive can be in. */
67 /** Given a status, returns true if there's a disk in the drive */
68 #define CD_INDRIVE(status) ((int)(status) > 0)
70 typedef struct SDL_CDtrack {
71 Uint8 id; /**< Track number */
72 Uint8 type; /**< Data or audio track */
74 Uint32 length; /**< Length, in frames, of this track */
75 Uint32 offset; /**< Offset, in frames, from start of disk */
78 /** This structure is only current as of the last call to SDL_CDStatus() */
79 typedef struct SDL_CD {
80 int id; /**< Private drive identifier */
81 CDstatus status; /**< Current drive status */
83 /** The rest of this structure is only valid if there's a CD in drive */
85 int numtracks; /**< Number of tracks on disk */
86 int cur_track; /**< Current track position */
87 int cur_frame; /**< Current frame offset within current track */
88 SDL_CDtrack track[SDL_MAX_TRACKS+1];
92 /** @name Frames / MSF Conversion Functions
93 * Conversion functions from frames to Minute/Second/Frames and vice versa
97 #define FRAMES_TO_MSF(f, M,S,F) { \
99 *(F) = value%CD_FPS; \
105 #define MSF_TO_FRAMES(M, S, F) ((M)*60*CD_FPS+(S)*CD_FPS+(F))
108 /* CD-audio API functions: */
111 * Returns the number of CD-ROM drives on the system, or -1 if
112 * SDL_Init() has not been called with the SDL_INIT_CDROM flag.
114 extern DECLSPEC int SDLCALL SDL_CDNumDrives(void);
117 * Returns a human-readable, system-dependent identifier for the CD-ROM.
121 * - "/dev/disk/ide/1/master"
123 extern DECLSPEC const char * SDLCALL SDL_CDName(int drive);
126 * Opens a CD-ROM drive for access. It returns a drive handle on success,
127 * or NULL if the drive was invalid or busy. This newly opened CD-ROM
128 * becomes the default CD used when other CD functions are passed a NULL
130 * Drives are numbered starting with 0. Drive 0 is the system default CD-ROM.
132 extern DECLSPEC SDL_CD * SDLCALL SDL_CDOpen(int drive);
135 * This function returns the current status of the given drive.
136 * If the drive has a CD in it, the table of contents of the CD and current
137 * play position of the CD will be stored in the SDL_CD structure.
139 extern DECLSPEC CDstatus SDLCALL SDL_CDStatus(SDL_CD *cdrom);
142 * Play the given CD starting at 'start_track' and 'start_frame' for 'ntracks'
143 * tracks and 'nframes' frames. If both 'ntrack' and 'nframe' are 0, play
144 * until the end of the CD. This function will skip data tracks.
145 * This function should only be called after calling SDL_CDStatus() to
146 * get track information about the CD.
150 * if ( CD_INDRIVE(SDL_CDStatus(cdrom)) )
151 * SDL_CDPlayTracks(cdrom, 0, 0, 0, 0);
152 * // Play last track:
153 * if ( CD_INDRIVE(SDL_CDStatus(cdrom)) ) {
154 * SDL_CDPlayTracks(cdrom, cdrom->numtracks-1, 0, 0, 0);
156 * // Play first and second track and 10 seconds of third track:
157 * if ( CD_INDRIVE(SDL_CDStatus(cdrom)) )
158 * SDL_CDPlayTracks(cdrom, 0, 0, 2, 10);
161 * @return This function returns 0, or -1 if there was an error.
163 extern DECLSPEC int SDLCALL SDL_CDPlayTracks(SDL_CD *cdrom,
164 int start_track, int start_frame, int ntracks, int nframes);
167 * Play the given CD starting at 'start' frame for 'length' frames.
168 * @return It returns 0, or -1 if there was an error.
170 extern DECLSPEC int SDLCALL SDL_CDPlay(SDL_CD *cdrom, int start, int length);
173 * @return returns 0, or -1 on error
175 extern DECLSPEC int SDLCALL SDL_CDPause(SDL_CD *cdrom);
178 * @return returns 0, or -1 on error
180 extern DECLSPEC int SDLCALL SDL_CDResume(SDL_CD *cdrom);
183 * @return returns 0, or -1 on error
185 extern DECLSPEC int SDLCALL SDL_CDStop(SDL_CD *cdrom);
188 * @return returns 0, or -1 on error
190 extern DECLSPEC int SDLCALL SDL_CDEject(SDL_CD *cdrom);
192 /** Closes the handle for the CD-ROM drive */
193 extern DECLSPEC void SDLCALL SDL_CDClose(SDL_CD *cdrom);
196 /* Ends C function definitions when using C++ */
200 #include "close_code.h"
202 #endif /* _SDL_video_h */