sdl_syscdrom.h

网络MPEG4IP流媒体开发源代码

/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002  Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; either
    version 2 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
    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public
    License along with this library; if not, write to the Free
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    Sam Lantinga
    [e-mail]
*/

#ifdef SAVE_RCSID
static char rcsid =
 "@(#) $Id$";
#endif

/* This is the system specific header for the SDL CD-ROM API */

/* Structure of CD audio control functions */
extern struct CDcaps {
	/* Get the name of the specified drive */
	const char *(*Name)(int drive);

	/* Open the specified drive, returning a drive id, or -1 on error */
	int (*Open)(int drive);

	/* Get table-of-contents (number of tracks + track info) for disk.
	   The TOC information should be stored in the cdrom structure.
	   This function should return 0 on success, or -1 on error.
	 */
	int (*GetTOC)(SDL_CD *cdrom);

	/* Return the current status and play position, in frames, of the
	   drive.  'position' may be NULL, and if so, should be ignored.
	 */
	CDstatus (*Status)(SDL_CD *cdrom, int *position);

	/* Play from frame 'start' to 'start+len' */
	int (*Play)(SDL_CD *cdrom, int start, int len); 

	/* Pause play */
	int (*Pause)(SDL_CD *cdrom);

	/* Resume play */
	int (*Resume)(SDL_CD *cdrom);

	/* Stop play */
	int (*Stop)(SDL_CD *cdrom);

	/* Eject the current disk */
	int (*Eject)(SDL_CD *cdrom);

	/* Close the specified drive */
	void (*Close)(SDL_CD *cdrom);
} SDL_CDcaps;

/* The number of available CD-ROM drives on the system */
extern int SDL_numcds;

/* Function to scan the system for CD-ROM drives and fill SDL_CDcaps.
 * This function should set SDL_numcds to the number of available CD
 * drives.  Drive 0 should be the system default CD-ROM.
 * It should return 0, or -1 on an unrecoverable fatal error.
*/
extern int  SDL_SYS_CDInit(void);

/* Function to perform any system-specific CD-ROM related cleanup */
extern void SDL_SYS_CDQuit(void);