src/cdrom/freebsd/SDL_syscdrom.c - third_party/sdl - Git at Google

 /*
     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
 */
 #include "SDL_config.h"

 #ifdef SDL_CDROM_FREEBSD

 /* Functions for system-level CD-ROM audio control */

 #include <sys/types.h>
 #include <sys/stat.h>
 #include <fcntl.h>
 #include <errno.h>
 #include <unistd.h>
 #include <sys/cdio.h>

 #include "SDL_cdrom.h"
 #include "../SDL_syscdrom.h"


 /* The maximum number of CD-ROM drives we'll detect */
 #define MAX_DRIVES	16

 /* A list of available CD-ROM drives */
 static char *SDL_cdlist[MAX_DRIVES];
 static dev_t SDL_cdmode[MAX_DRIVES];

 /* The system-dependent CD control functions */
 static const char *SDL_SYS_CDName(int drive);
 static int SDL_SYS_CDOpen(int drive);
 static int SDL_SYS_CDGetTOC(SDL_CD *cdrom);
 static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position);
 static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length);
 static int SDL_SYS_CDPause(SDL_CD *cdrom);
 static int SDL_SYS_CDResume(SDL_CD *cdrom);
 static int SDL_SYS_CDStop(SDL_CD *cdrom);
 static int SDL_SYS_CDEject(SDL_CD *cdrom);
 static void SDL_SYS_CDClose(SDL_CD *cdrom);

 /* Some ioctl() errno values which occur when the tray is empty */
 #define ERRNO_TRAYEMPTY(errno)	\
 	((errno == EIO) || (errno == ENOENT) || (errno == EINVAL))

 /* Check a drive to see if it is a CD-ROM */
 static int CheckDrive(char *drive, struct stat *stbuf)
 {
 	int is_cd, cdfd;
 	struct ioc_read_subchannel info;

 	/* If it doesn't exist, return -1 */
 	if ( stat(drive, stbuf) < 0 ) {
 		return(-1);
 	}

 	/* If it does exist, verify that it's an available CD-ROM */
 	is_cd = 0;
 	if ( S_ISCHR(stbuf->st_mode) || S_ISBLK(stbuf->st_mode) ) {
 		cdfd = open(drive, (O_RDONLY|O_EXCL|O_NONBLOCK), 0);
 		if ( cdfd >= 0 ) {
 			info.address_format = CD_MSF_FORMAT;
 			info.data_format = CD_CURRENT_POSITION;
 			info.data_len = 0;
 			info.data = NULL;
 			/* Under Linux, EIO occurs when a disk is not present.
 			   This isn't 100% reliable, so we use the USE_MNTENT
 			   code above instead.
 			 */
 			if ( (ioctl(cdfd, CDIOCREADSUBCHANNEL, &info) == 0) ||
 						ERRNO_TRAYEMPTY(errno) ) {
 				is_cd = 1;
 			}
 			close(cdfd);
 		}
 	}
 	return(is_cd);
 }

 /* Add a CD-ROM drive to our list of valid drives */
 static void AddDrive(char *drive, struct stat *stbuf)
 {
 	int i;

 	if ( SDL_numcds < MAX_DRIVES ) {
 		/* Check to make sure it's not already in our list.
 	 	   This can happen when we see a drive via symbolic link.
 		 */
 		for ( i=0; i<SDL_numcds; ++i ) {
 			if ( stbuf->st_rdev == SDL_cdmode[i] ) {
 #ifdef DEBUG_CDROM
   fprintf(stderr, "Duplicate drive detected: %s == %s\n", drive, SDL_cdlist[i]);
 #endif
 				return;
 			}
 		}

 		/* Add this drive to our list */
 		i = SDL_numcds;
 		SDL_cdlist[i] = SDL_strdup(drive);
 		if ( SDL_cdlist[i] == NULL ) {
 			SDL_OutOfMemory();
 			return;
 		}
 		SDL_cdmode[i] = stbuf->st_rdev;
 		++SDL_numcds;
 #ifdef DEBUG_CDROM
   fprintf(stderr, "Added CD-ROM drive: %s\n", drive);
 #endif
 	}
 }

 int  SDL_SYS_CDInit(void)
 {
 	/* checklist: /dev/cdrom,/dev/cd?c /dev/acd?c
 			/dev/matcd?c /dev/mcd?c /dev/scd?c */
 	static char *checklist[] = {
 	"cdrom", "?0 cd?", "?0 acd?", "?0 matcd?", "?0 mcd?", "?0 scd?",NULL
 	};
 	char *SDLcdrom;
 	int i, j, exists;
 	char drive[32];
 	struct stat stbuf;

 	/* Fill in our driver capabilities */
 	SDL_CDcaps.Name = SDL_SYS_CDName;
 	SDL_CDcaps.Open = SDL_SYS_CDOpen;
 	SDL_CDcaps.GetTOC = SDL_SYS_CDGetTOC;
 	SDL_CDcaps.Status = SDL_SYS_CDStatus;
 	SDL_CDcaps.Play = SDL_SYS_CDPlay;
 	SDL_CDcaps.Pause = SDL_SYS_CDPause;
 	SDL_CDcaps.Resume = SDL_SYS_CDResume;
 	SDL_CDcaps.Stop = SDL_SYS_CDStop;
 	SDL_CDcaps.Eject = SDL_SYS_CDEject;
 	SDL_CDcaps.Close = SDL_SYS_CDClose;

 	/* Look in the environment for our CD-ROM drive list */
 	SDLcdrom = SDL_getenv("SDL_CDROM");	/* ':' separated list of devices */
 	if ( SDLcdrom != NULL ) {
 		char *cdpath, *delim;
 		size_t len = SDL_strlen(SDLcdrom)+1;
 		cdpath = SDL_stack_alloc(char, len);
 		if ( cdpath != NULL ) {
 			SDL_strlcpy(cdpath, SDLcdrom, len);
 			SDLcdrom = cdpath;
 			do {
 				delim = SDL_strchr(SDLcdrom, ':');
 				if ( delim ) {
 					*delim++ = '\0';
 				}
 				if ( CheckDrive(SDLcdrom, &stbuf) > 0 ) {
 					AddDrive(SDLcdrom, &stbuf);
 				}
 				if ( delim ) {
 					SDLcdrom = delim;
 				} else {
 					SDLcdrom = NULL;
 				}
 			} while ( SDLcdrom );
 			SDL_stack_free(cdpath);
 		}

 		/* If we found our drives, there's nothing left to do */
 		if ( SDL_numcds > 0 ) {
 			return(0);
 		}
 	}

 	/* Scan the system for CD-ROM drives */
 	for ( i=0; checklist[i]; ++i ) {
 		if ( checklist[i][0] == '?' ) {
 			char *insert;
 			exists = 1;
 			for ( j=checklist[i][1]; exists; ++j ) {
 				SDL_snprintf(drive, SDL_arraysize(drive), "/dev/%sc", &checklist[i][3]);
 				insert = SDL_strchr(drive, '?');
 				if ( insert != NULL ) {
 					*insert = j;
 				}
 				switch (CheckDrive(drive, &stbuf)) {
 					/* Drive exists and is a CD-ROM */
 					case 1:
 						AddDrive(drive, &stbuf);
 						break;
 					/* Drive exists, but isn't a CD-ROM */
 					case 0:
 						break;
 					/* Drive doesn't exist */
 					case -1:
 						exists = 0;
 						break;
 				}
 			}
 		} else {
 			SDL_snprintf(drive, SDL_arraysize(drive), "/dev/%s", checklist[i]);
 			if ( CheckDrive(drive, &stbuf) > 0 ) {
 				AddDrive(drive, &stbuf);
 			}
 		}
 	}
 	return(0);
 }

 /* General ioctl() CD-ROM command function */
 static int SDL_SYS_CDioctl(int id, int command, void *arg)
 {
 	int retval;

 	retval = ioctl(id, command, arg);
 	if ( retval < 0 ) {
 		SDL_SetError("ioctl() error: %s", strerror(errno));
 	}
 	return(retval);
 }

 static const char *SDL_SYS_CDName(int drive)
 {
 	return(SDL_cdlist[drive]);
 }

 static int SDL_SYS_CDOpen(int drive)
 {
 	return(open(SDL_cdlist[drive], (O_RDONLY|O_EXCL|O_NONBLOCK), 0));
 }

 static int SDL_SYS_CDGetTOC(SDL_CD *cdrom)
 {
 	struct ioc_toc_header toc;
 	int i, okay;
 	struct ioc_read_toc_entry entry;
 	struct cd_toc_entry data;

 	okay = 0;
 	if ( SDL_SYS_CDioctl(cdrom->id, CDIOREADTOCHEADER, &toc) == 0 ) {
 		cdrom->numtracks = toc.ending_track-toc.starting_track+1;
 		if ( cdrom->numtracks > SDL_MAX_TRACKS ) {
 			cdrom->numtracks = SDL_MAX_TRACKS;
 		}
 		/* Read all the track TOC entries */
 		for ( i=0; i<=cdrom->numtracks; ++i ) {
 			if ( i == cdrom->numtracks ) {
 				cdrom->track[i].id = 0xAA; /* CDROM_LEADOUT */
 			} else {
 				cdrom->track[i].id = toc.starting_track+i;
 			}
 			entry.starting_track = cdrom->track[i].id;
 			entry.address_format = CD_MSF_FORMAT;
 			entry.data_len = sizeof(data);
 			entry.data = &data;
 			if ( SDL_SYS_CDioctl(cdrom->id, CDIOREADTOCENTRYS,
 								&entry) < 0 ) {
 				break;
 			} else {
 				cdrom->track[i].type = data.control;
 				cdrom->track[i].offset = MSF_TO_FRAMES(
 						data.addr.msf.minute,
 						data.addr.msf.second,
 						data.addr.msf.frame);
 				cdrom->track[i].length = 0;
 				if ( i > 0 ) {
 					cdrom->track[i-1].length =
 						cdrom->track[i].offset-
 						cdrom->track[i-1].offset;
 				}
 			}
 		}
 		if ( i == (cdrom->numtracks+1) ) {
 			okay = 1;
 		}
 	}
 	return(okay ? 0 : -1);
 }

 /* Get CD-ROM status */
 static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position)
 {
 	CDstatus status;
 	struct ioc_toc_header toc;
 	struct ioc_read_subchannel info;
 	struct cd_sub_channel_info data;

 	info.address_format = CD_MSF_FORMAT;
 	info.data_format = CD_CURRENT_POSITION;
 	info.track = 0;
 	info.data_len = sizeof(data);
 	info.data = &data;
 	if ( ioctl(cdrom->id, CDIOCREADSUBCHANNEL, &info) < 0 ) {
 		if ( ERRNO_TRAYEMPTY(errno) ) {
 			status = CD_TRAYEMPTY;
 		} else {
 			status = CD_ERROR;
 		}
 	} else {
 		switch (data.header.audio_status) {
 			case CD_AS_AUDIO_INVALID:
 			case CD_AS_NO_STATUS:
 				/* Try to determine if there's a CD available */
 				if (ioctl(cdrom->id,CDIOREADTOCHEADER,&toc)==0)
 					status = CD_STOPPED;
 				else
 					status = CD_TRAYEMPTY;
 				break;
 			case CD_AS_PLAY_COMPLETED:
 				status = CD_STOPPED;
 				break;
 			case CD_AS_PLAY_IN_PROGRESS:
 				status = CD_PLAYING;
 				break;
 			case CD_AS_PLAY_PAUSED:
 				status = CD_PAUSED;
 				break;
 			default:
 				status = CD_ERROR;
 				break;
 		}
 	}
 	if ( position ) {
 		if ( status == CD_PLAYING || (status == CD_PAUSED) ) {
 			*position = MSF_TO_FRAMES(
 					data.what.position.absaddr.msf.minute,
 					data.what.position.absaddr.msf.second,
 					data.what.position.absaddr.msf.frame);
 		} else {
 			*position = 0;
 		}
 	}
 	return(status);
 }

 /* Start play */
 static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length)
 {
 	struct ioc_play_msf playtime;

 	FRAMES_TO_MSF(start,
 		&playtime.start_m, &playtime.start_s, &playtime.start_f);
 	FRAMES_TO_MSF(start+length,
 		&playtime.end_m, &playtime.end_s, &playtime.end_f);
 #ifdef DEBUG_CDROM
   fprintf(stderr, "Trying to play from %d:%d:%d to %d:%d:%d\n",
 	playtime.cdmsf_min0, playtime.cdmsf_sec0, playtime.cdmsf_frame0,
 	playtime.cdmsf_min1, playtime.cdmsf_sec1, playtime.cdmsf_frame1);
 #endif
 	ioctl(cdrom->id, CDIOCSTART, 0);
 	return(SDL_SYS_CDioctl(cdrom->id, CDIOCPLAYMSF, &playtime));
 }

 /* Pause play */
 static int SDL_SYS_CDPause(SDL_CD *cdrom)
 {
 	return(SDL_SYS_CDioctl(cdrom->id, CDIOCPAUSE, 0));
 }

 /* Resume play */
 static int SDL_SYS_CDResume(SDL_CD *cdrom)
 {
 	return(SDL_SYS_CDioctl(cdrom->id, CDIOCRESUME, 0));
 }

 /* Stop play */
 static int SDL_SYS_CDStop(SDL_CD *cdrom)
 {
 	return(SDL_SYS_CDioctl(cdrom->id, CDIOCSTOP, 0));
 }

 /* Eject the CD-ROM */
 static int SDL_SYS_CDEject(SDL_CD *cdrom)
 {
 	return(SDL_SYS_CDioctl(cdrom->id, CDIOCEJECT, 0));
 }

 /* Close the CD-ROM handle */
 static void SDL_SYS_CDClose(SDL_CD *cdrom)
 {
 	close(cdrom->id);
 }

 void SDL_SYS_CDQuit(void)
 {
 	int i;

 	if ( SDL_numcds > 0 ) {
 		for ( i=0; i<SDL_numcds; ++i ) {
 			SDL_free(SDL_cdlist[i]);
 		}
 		SDL_numcds = 0;
 	}
 }

 #endif /* SDL_CDROM_FREEBSD */
	/*
	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
	*/
	#include "SDL_config.h"

	#ifdef SDL_CDROM_FREEBSD

	/* Functions for system-level CD-ROM audio control */

	#include <sys/types.h>
	#include <sys/stat.h>
	#include <fcntl.h>
	#include <errno.h>
	#include <unistd.h>
	#include <sys/cdio.h>

	#include "SDL_cdrom.h"
	#include "../SDL_syscdrom.h"


	/* The maximum number of CD-ROM drives we'll detect */
	#define MAX_DRIVES 16

	/* A list of available CD-ROM drives */
	static char *SDL_cdlist[MAX_DRIVES];
	static dev_t SDL_cdmode[MAX_DRIVES];

	/* The system-dependent CD control functions */
	static const char *SDL_SYS_CDName(int drive);
	static int SDL_SYS_CDOpen(int drive);
	static int SDL_SYS_CDGetTOC(SDL_CD *cdrom);
	static CDstatus SDL_SYS_CDStatus(SDL_CD cdrom, int position);
	static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length);
	static int SDL_SYS_CDPause(SDL_CD *cdrom);
	static int SDL_SYS_CDResume(SDL_CD *cdrom);
	static int SDL_SYS_CDStop(SDL_CD *cdrom);
	static int SDL_SYS_CDEject(SDL_CD *cdrom);
	static void SDL_SYS_CDClose(SDL_CD *cdrom);

	/* Some ioctl() errno values which occur when the tray is empty */
	#define ERRNO_TRAYEMPTY(errno) \
	((errno == EIO) \|\| (errno == ENOENT) \|\| (errno == EINVAL))

	/* Check a drive to see if it is a CD-ROM */
	static int CheckDrive(char drive, struct stat stbuf)
	{
	int is_cd, cdfd;
	struct ioc_read_subchannel info;

	/* If it doesn't exist, return -1 */
	if ( stat(drive, stbuf) < 0 ) {
	return(-1);
	}

	/* If it does exist, verify that it's an available CD-ROM */
	is_cd = 0;
	if ( S_ISCHR(stbuf->st_mode) \|\| S_ISBLK(stbuf->st_mode) ) {
	cdfd = open(drive, (O_RDONLY\|O_EXCL\|O_NONBLOCK), 0);
	if ( cdfd >= 0 ) {
	info.address_format = CD_MSF_FORMAT;
	info.data_format = CD_CURRENT_POSITION;
	info.data_len = 0;
	info.data = NULL;
	/* Under Linux, EIO occurs when a disk is not present.
	This isn't 100% reliable, so we use the USE_MNTENT
	code above instead.
	*/
	if ( (ioctl(cdfd, CDIOCREADSUBCHANNEL, &info) == 0) \|\|
	ERRNO_TRAYEMPTY(errno) ) {
	is_cd = 1;
	}
	close(cdfd);
	}
	}
	return(is_cd);
	}

	/* Add a CD-ROM drive to our list of valid drives */
	static void AddDrive(char drive, struct stat stbuf)
	{
	int i;

	if ( SDL_numcds < MAX_DRIVES ) {
	/* Check to make sure it's not already in our list.
	This can happen when we see a drive via symbolic link.
	*/
	for ( i=0; i<SDL_numcds; ++i ) {
	if ( stbuf->st_rdev == SDL_cdmode[i] ) {
	#ifdef DEBUG_CDROM
	fprintf(stderr, "Duplicate drive detected: %s == %s\n", drive, SDL_cdlist[i]);
	#endif
	return;
	}
	}

	/* Add this drive to our list */
	i = SDL_numcds;
	SDL_cdlist[i] = SDL_strdup(drive);
	if ( SDL_cdlist[i] == NULL ) {
	SDL_OutOfMemory();
	return;
	}
	SDL_cdmode[i] = stbuf->st_rdev;
	++SDL_numcds;
	#ifdef DEBUG_CDROM
	fprintf(stderr, "Added CD-ROM drive: %s\n", drive);
	#endif
	}
	}

	int SDL_SYS_CDInit(void)
	{
	/* checklist: /dev/cdrom,/dev/cd?c /dev/acd?c
	/dev/matcd?c /dev/mcd?c /dev/scd?c */
	static char *checklist[] = {
	"cdrom", "?0 cd?", "?0 acd?", "?0 matcd?", "?0 mcd?", "?0 scd?",NULL
	};
	char *SDLcdrom;
	int i, j, exists;
	char drive[32];
	struct stat stbuf;

	/* Fill in our driver capabilities */
	SDL_CDcaps.Name = SDL_SYS_CDName;
	SDL_CDcaps.Open = SDL_SYS_CDOpen;
	SDL_CDcaps.GetTOC = SDL_SYS_CDGetTOC;
	SDL_CDcaps.Status = SDL_SYS_CDStatus;
	SDL_CDcaps.Play = SDL_SYS_CDPlay;
	SDL_CDcaps.Pause = SDL_SYS_CDPause;
	SDL_CDcaps.Resume = SDL_SYS_CDResume;
	SDL_CDcaps.Stop = SDL_SYS_CDStop;
	SDL_CDcaps.Eject = SDL_SYS_CDEject;
	SDL_CDcaps.Close = SDL_SYS_CDClose;

	/* Look in the environment for our CD-ROM drive list */
	SDLcdrom = SDL_getenv("SDL_CDROM"); /* ':' separated list of devices */
	if ( SDLcdrom != NULL ) {
	char cdpath, delim;
	size_t len = SDL_strlen(SDLcdrom)+1;
	cdpath = SDL_stack_alloc(char, len);
	if ( cdpath != NULL ) {
	SDL_strlcpy(cdpath, SDLcdrom, len);
	SDLcdrom = cdpath;
	do {
	delim = SDL_strchr(SDLcdrom, ':');
	if ( delim ) {
	*delim++ = '\0';
	}
	if ( CheckDrive(SDLcdrom, &stbuf) > 0 ) {
	AddDrive(SDLcdrom, &stbuf);
	}
	if ( delim ) {
	SDLcdrom = delim;
	} else {
	SDLcdrom = NULL;
	}
	} while ( SDLcdrom );
	SDL_stack_free(cdpath);
	}

	/* If we found our drives, there's nothing left to do */
	if ( SDL_numcds > 0 ) {
	return(0);
	}
	}

	/* Scan the system for CD-ROM drives */
	for ( i=0; checklist[i]; ++i ) {
	if ( checklist[i][0] == '?' ) {
	char *insert;
	exists = 1;
	for ( j=checklist[i][1]; exists; ++j ) {
	SDL_snprintf(drive, SDL_arraysize(drive), "/dev/%sc", &checklist[i][3]);
	insert = SDL_strchr(drive, '?');
	if ( insert != NULL ) {
	*insert = j;
	}
	switch (CheckDrive(drive, &stbuf)) {
	/* Drive exists and is a CD-ROM */
	case 1:
	AddDrive(drive, &stbuf);
	break;
	/* Drive exists, but isn't a CD-ROM */
	case 0:
	break;
	/* Drive doesn't exist */
	case -1:
	exists = 0;
	break;
	}
	}
	} else {
	SDL_snprintf(drive, SDL_arraysize(drive), "/dev/%s", checklist[i]);
	if ( CheckDrive(drive, &stbuf) > 0 ) {
	AddDrive(drive, &stbuf);
	}
	}
	}
	return(0);
	}

	/* General ioctl() CD-ROM command function */
	static int SDL_SYS_CDioctl(int id, int command, void *arg)
	{
	int retval;

	retval = ioctl(id, command, arg);
	if ( retval < 0 ) {
	SDL_SetError("ioctl() error: %s", strerror(errno));
	}
	return(retval);
	}

	static const char *SDL_SYS_CDName(int drive)
	{
	return(SDL_cdlist[drive]);
	}

	static int SDL_SYS_CDOpen(int drive)
	{
	return(open(SDL_cdlist[drive], (O_RDONLY\|O_EXCL\|O_NONBLOCK), 0));
	}

	static int SDL_SYS_CDGetTOC(SDL_CD *cdrom)
	{
	struct ioc_toc_header toc;
	int i, okay;
	struct ioc_read_toc_entry entry;
	struct cd_toc_entry data;

	okay = 0;
	if ( SDL_SYS_CDioctl(cdrom->id, CDIOREADTOCHEADER, &toc) == 0 ) {
	cdrom->numtracks = toc.ending_track-toc.starting_track+1;
	if ( cdrom->numtracks > SDL_MAX_TRACKS ) {
	cdrom->numtracks = SDL_MAX_TRACKS;
	}
	/* Read all the track TOC entries */
	for ( i=0; i<=cdrom->numtracks; ++i ) {
	if ( i == cdrom->numtracks ) {
	cdrom->track[i].id = 0xAA; /* CDROM_LEADOUT */
	} else {
	cdrom->track[i].id = toc.starting_track+i;
	}
	entry.starting_track = cdrom->track[i].id;
	entry.address_format = CD_MSF_FORMAT;
	entry.data_len = sizeof(data);
	entry.data = &data;
	if ( SDL_SYS_CDioctl(cdrom->id, CDIOREADTOCENTRYS,
	&entry) < 0 ) {
	break;
	} else {
	cdrom->track[i].type = data.control;
	cdrom->track[i].offset = MSF_TO_FRAMES(
	data.addr.msf.minute,
	data.addr.msf.second,
	data.addr.msf.frame);
	cdrom->track[i].length = 0;
	if ( i > 0 ) {
	cdrom->track[i-1].length =
	cdrom->track[i].offset-
	cdrom->track[i-1].offset;
	}
	}
	}
	if ( i == (cdrom->numtracks+1) ) {
	okay = 1;
	}
	}
	return(okay ? 0 : -1);
	}

	/* Get CD-ROM status */
	static CDstatus SDL_SYS_CDStatus(SDL_CD cdrom, int position)
	{
	CDstatus status;
	struct ioc_toc_header toc;
	struct ioc_read_subchannel info;
	struct cd_sub_channel_info data;

	info.address_format = CD_MSF_FORMAT;
	info.data_format = CD_CURRENT_POSITION;
	info.track = 0;
	info.data_len = sizeof(data);
	info.data = &data;
	if ( ioctl(cdrom->id, CDIOCREADSUBCHANNEL, &info) < 0 ) {
	if ( ERRNO_TRAYEMPTY(errno) ) {
	status = CD_TRAYEMPTY;
	} else {
	status = CD_ERROR;
	}
	} else {
	switch (data.header.audio_status) {
	case CD_AS_AUDIO_INVALID:
	case CD_AS_NO_STATUS:
	/* Try to determine if there's a CD available */
	if (ioctl(cdrom->id,CDIOREADTOCHEADER,&toc)==0)
	status = CD_STOPPED;
	else
	status = CD_TRAYEMPTY;
	break;
	case CD_AS_PLAY_COMPLETED:
	status = CD_STOPPED;
	break;
	case CD_AS_PLAY_IN_PROGRESS:
	status = CD_PLAYING;
	break;
	case CD_AS_PLAY_PAUSED:
	status = CD_PAUSED;
	break;
	default:
	status = CD_ERROR;
	break;
	}
	}
	if ( position ) {
	if ( status == CD_PLAYING \|\| (status == CD_PAUSED) ) {
	*position = MSF_TO_FRAMES(
	data.what.position.absaddr.msf.minute,
	data.what.position.absaddr.msf.second,
	data.what.position.absaddr.msf.frame);
	} else {
	*position = 0;
	}
	}
	return(status);
	}

	/* Start play */
	static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length)
	{
	struct ioc_play_msf playtime;

	FRAMES_TO_MSF(start,
	&playtime.start_m, &playtime.start_s, &playtime.start_f);
	FRAMES_TO_MSF(start+length,
	&playtime.end_m, &playtime.end_s, &playtime.end_f);
	#ifdef DEBUG_CDROM
	fprintf(stderr, "Trying to play from %d:%d:%d to %d:%d:%d\n",
	playtime.cdmsf_min0, playtime.cdmsf_sec0, playtime.cdmsf_frame0,
	playtime.cdmsf_min1, playtime.cdmsf_sec1, playtime.cdmsf_frame1);
	#endif
	ioctl(cdrom->id, CDIOCSTART, 0);
	return(SDL_SYS_CDioctl(cdrom->id, CDIOCPLAYMSF, &playtime));
	}

	/* Pause play */
	static int SDL_SYS_CDPause(SDL_CD *cdrom)
	{
	return(SDL_SYS_CDioctl(cdrom->id, CDIOCPAUSE, 0));
	}

	/* Resume play */
	static int SDL_SYS_CDResume(SDL_CD *cdrom)
	{
	return(SDL_SYS_CDioctl(cdrom->id, CDIOCRESUME, 0));
	}

	/* Stop play */
	static int SDL_SYS_CDStop(SDL_CD *cdrom)
	{
	return(SDL_SYS_CDioctl(cdrom->id, CDIOCSTOP, 0));
	}

	/* Eject the CD-ROM */
	static int SDL_SYS_CDEject(SDL_CD *cdrom)
	{
	return(SDL_SYS_CDioctl(cdrom->id, CDIOCEJECT, 0));
	}

	/* Close the CD-ROM handle */
	static void SDL_SYS_CDClose(SDL_CD *cdrom)
	{
	close(cdrom->id);
	}

	void SDL_SYS_CDQuit(void)
	{
	int i;

	if ( SDL_numcds > 0 ) {
	for ( i=0; i<SDL_numcds; ++i ) {
	SDL_free(SDL_cdlist[i]);
	}
	SDL_numcds = 0;
	}
	}

	#endif /* SDL_CDROM_FREEBSD */