include/SDL_cdrom.h
author Sam Lantinga <slouken@libsdl.org>
Sat, 29 Dec 2007 06:08:17 +0000
branchSDL-1.2
changeset 4113 82dab719502e
parent 1358 c71e05b4dc2e
child 1662 782fd950bd46
child 1895 c121d94672cb
child 4159 a1b03ba2fcd0
permissions -rw-r--r--
Fixed bug #464
Added X1/X2 button constants
     1 /*
     2     SDL - Simple DirectMedia Layer
     3     Copyright (C) 1997-2006 Sam Lantinga
     4 
     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.
     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
    13     Lesser General Public License for more details.
    14 
    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
    18 
    19     Sam Lantinga
    20     slouken@libsdl.org
    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 
    28 #include "SDL_stdinc.h"
    29 #include "SDL_error.h"
    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 */
    59 #define CD_INDRIVE(status)	((int)(status) > 0)
    60 
    61 typedef struct SDL_CDtrack {
    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  */
    98 extern DECLSPEC int SDLCALL SDL_CDNumDrives(void);
    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 */
   106 extern DECLSPEC const char * SDLCALL SDL_CDName(int drive);
   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 */
   114 extern DECLSPEC SDL_CD * SDLCALL SDL_CDOpen(int drive);
   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 */
   120 extern DECLSPEC CDstatus SDLCALL SDL_CDStatus(SDL_CD *cdrom);
   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 */
   141 extern DECLSPEC int SDLCALL SDL_CDPlayTracks(SDL_CD *cdrom,
   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 */
   147 extern DECLSPEC int SDLCALL SDL_CDPlay(SDL_CD *cdrom, int start, int length);
   148 
   149 /* Pause play -- returns 0, or -1 on error */
   150 extern DECLSPEC int SDLCALL SDL_CDPause(SDL_CD *cdrom);
   151 
   152 /* Resume play -- returns 0, or -1 on error */
   153 extern DECLSPEC int SDLCALL SDL_CDResume(SDL_CD *cdrom);
   154 
   155 /* Stop play -- returns 0, or -1 on error */
   156 extern DECLSPEC int SDLCALL SDL_CDStop(SDL_CD *cdrom);
   157 
   158 /* Eject CD-ROM -- returns 0, or -1 on error */
   159 extern DECLSPEC int SDLCALL SDL_CDEject(SDL_CD *cdrom);
   160 
   161 /* Closes the handle for the CD-ROM drive */
   162 extern DECLSPEC void SDLCALL SDL_CDClose(SDL_CD *cdrom);
   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 */