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/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2009 Sam Lantinga
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Sam Lantinga
slouken@libsdl.org
*/
/**
* @file SDL_cdrom.h
* This is the CD-audio control API for Simple DirectMedia Layer
*/
#ifndef _SDL_cdrom_h
#define _SDL_cdrom_h
#include "SDL_stdinc.h"
#include "SDL_error.h"
#include "begin_code.h"
/* Set up for C function definitions, even when using C++ */
#ifdef __cplusplus
extern "C" {
#endif
/**
* @file SDL_cdrom.h
* In order to use these functions, SDL_Init() must have been called
* with the SDL_INIT_CDROM flag. This causes SDL to scan the system
* for CD-ROM drives, and load appropriate drivers.
*/
/** The maximum number of CD-ROM tracks on a disk */
#define SDL_MAX_TRACKS 99
/** @name Track Types
* The types of CD-ROM track possible
*/
/*@{*/
#define SDL_AUDIO_TRACK 0x00
#define SDL_DATA_TRACK 0x04
/*@}*/
/** The possible states which a CD-ROM drive can be in. */
typedef enum {
CD_TRAYEMPTY,
CD_STOPPED,
CD_PLAYING,
CD_PAUSED,
CD_ERROR = -1
} CDstatus;
/** Given a status, returns true if there's a disk in the drive */
#define CD_INDRIVE(status) ((int)(status) > 0)
typedef struct SDL_CDtrack {
Uint8 id; /**< Track number */
Uint8 type; /**< Data or audio track */
Uint16 unused;
Uint32 length; /**< Length, in frames, of this track */
Uint32 offset; /**< Offset, in frames, from start of disk */
} SDL_CDtrack;
/** This structure is only current as of the last call to SDL_CDStatus() */
typedef struct SDL_CD {
int id; /**< Private drive identifier */
CDstatus status; /**< Current drive status */
/** The rest of this structure is only valid if there's a CD in drive */
/*@{*/
int numtracks; /**< Number of tracks on disk */
int cur_track; /**< Current track position */
int cur_frame; /**< Current frame offset within current track */
SDL_CDtrack track[SDL_MAX_TRACKS+1];
/*@}*/
} SDL_CD;
/** @name Frames / MSF Conversion Functions
* Conversion functions from frames to Minute/Second/Frames and vice versa
*/
/*@{*/
#define CD_FPS 75
#define FRAMES_TO_MSF(f, M,S,F) { \
int value = f; \
*(F) = value%CD_FPS; \
value /= CD_FPS; \
*(S) = value%60; \
value /= 60; \
*(M) = value; \
}
#define MSF_TO_FRAMES(M, S, F) ((M)*60*CD_FPS+(S)*CD_FPS+(F))
/*@}*/
/* CD-audio API functions: */
/**
* Returns the number of CD-ROM drives on the system, or -1 if
* SDL_Init() has not been called with the SDL_INIT_CDROM flag.
*/
extern DECLSPEC int SDLCALL SDL_CDNumDrives(void);
/**
* Returns a human-readable, system-dependent identifier for the CD-ROM.
* Example:
* - "/dev/cdrom"
* - "E:"
* - "/dev/disk/ide/1/master"
*/
extern DECLSPEC const char * SDLCALL SDL_CDName(int drive);
/**
* Opens a CD-ROM drive for access. It returns a drive handle on success,
* or NULL if the drive was invalid or busy. This newly opened CD-ROM
* becomes the default CD used when other CD functions are passed a NULL
* CD-ROM handle.
* Drives are numbered starting with 0. Drive 0 is the system default CD-ROM.
*/
extern DECLSPEC SDL_CD * SDLCALL SDL_CDOpen(int drive);
/**
* This function returns the current status of the given drive.
* If the drive has a CD in it, the table of contents of the CD and current
* play position of the CD will be stored in the SDL_CD structure.
*/
extern DECLSPEC CDstatus SDLCALL SDL_CDStatus(SDL_CD *cdrom);
/**
* Play the given CD starting at 'start_track' and 'start_frame' for 'ntracks'
* tracks and 'nframes' frames. If both 'ntrack' and 'nframe' are 0, play
* until the end of the CD. This function will skip data tracks.
* This function should only be called after calling SDL_CDStatus() to
* get track information about the CD.
* For example:
* @code
* // Play entire CD:
* if ( CD_INDRIVE(SDL_CDStatus(cdrom)) )
* SDL_CDPlayTracks(cdrom, 0, 0, 0, 0);
* // Play last track:
* if ( CD_INDRIVE(SDL_CDStatus(cdrom)) ) {
* SDL_CDPlayTracks(cdrom, cdrom->numtracks-1, 0, 0, 0);
* }
* // Play first and second track and 10 seconds of third track:
* if ( CD_INDRIVE(SDL_CDStatus(cdrom)) )
* SDL_CDPlayTracks(cdrom, 0, 0, 2, 10);
* @endcode
*
* @return This function returns 0, or -1 if there was an error.
*/
extern DECLSPEC int SDLCALL SDL_CDPlayTracks(SDL_CD *cdrom,
int start_track, int start_frame, int ntracks, int nframes);
/**
* Play the given CD starting at 'start' frame for 'length' frames.
* @return It returns 0, or -1 if there was an error.
*/
extern DECLSPEC int SDLCALL SDL_CDPlay(SDL_CD *cdrom, int start, int length);
/** Pause play
* @return returns 0, or -1 on error
*/
extern DECLSPEC int SDLCALL SDL_CDPause(SDL_CD *cdrom);
/** Resume play
* @return returns 0, or -1 on error
*/
extern DECLSPEC int SDLCALL SDL_CDResume(SDL_CD *cdrom);
/** Stop play
* @return returns 0, or -1 on error
*/
extern DECLSPEC int SDLCALL SDL_CDStop(SDL_CD *cdrom);
/** Eject CD-ROM
* @return returns 0, or -1 on error
*/
extern DECLSPEC int SDLCALL SDL_CDEject(SDL_CD *cdrom);
/** Closes the handle for the CD-ROM drive */
extern DECLSPEC void SDLCALL SDL_CDClose(SDL_CD *cdrom);
/* Ends C function definitions when using C++ */
#ifdef __cplusplus
}
#endif
#include "close_code.h"
#endif /* _SDL_video_h */
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