--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/cdrom/linux/SDL_syscdrom.c	Thu Apr 26 16:45:43 2001 +0000
@@ -0,0 +1,528 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997, 1998, 1999, 2000, 2001  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
+    slouken@devolution.com
+*/
+
+#ifdef SAVE_RCSID
+static char rcsid =
+ "@(#) $Id$";
+#endif
+
+/* Functions for system-level CD-ROM audio control */
+
+#include <sys/types.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <unistd.h>
+#ifdef __linux__
+#include <linux/cdrom.h>
+#endif
+#ifdef __SVR4
+#include <sys/cdio.h>
+#endif
+
+/* Define this to use the alternative getmntent() code */
+#ifndef __SVR4
+#define USE_MNTENT
+#endif
+
+#ifdef USE_MNTENT
+#if defined(__USLC__)
+#include <sys/mntent.h>
+#else
+#include <mntent.h>
+#endif
+
+#ifndef _PATH_MNTTAB
+#ifdef MNTTAB
+#define _PATH_MNTTAB	MNTTAB
+#else
+#define _PATH_MNTTAB	"/etc/fstab"
+#endif
+#endif /* !_PATH_MNTTAB */
+
+#ifndef _PATH_MOUNTED
+#define _PATH_MOUNTED	"/etc/mtab"
+#endif /* !_PATH_MOUNTED */
+
+#ifndef MNTTYPE_CDROM
+#define MNTTYPE_CDROM	"iso9660"
+#endif
+#ifndef MNTTYPE_SUPER
+#define MNTTYPE_SUPER	"supermount"
+#endif
+#endif /* USE_MNTENT */
+
+#include "SDL_error.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, char *mnttype, struct stat *stbuf)
+{
+	int is_cd, cdfd;
+	struct cdrom_subchnl 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.cdsc_format = CDROM_MSF;
+			/* Under Linux, EIO occurs when a disk is not present.
+			 */
+			if ( (ioctl(cdfd, CDROMSUBCHNL, &info) == 0) ||
+						ERRNO_TRAYEMPTY(errno) ) {
+				is_cd = 1;
+			}
+			close(cdfd);
+		}
+#ifdef USE_MNTENT
+		/* Even if we can't read it, it might be mounted */
+		else if ( mnttype && (strcmp(mnttype, MNTTYPE_CDROM) == 0) ) {
+			is_cd = 1;
+		}
+#endif
+	}
+	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] = (char *)malloc(strlen(drive)+1);
+		if ( SDL_cdlist[i] == NULL ) {
+			SDL_OutOfMemory();
+			return;
+		}
+		strcpy(SDL_cdlist[i], drive);
+		SDL_cdmode[i] = stbuf->st_rdev;
+		++SDL_numcds;
+#ifdef DEBUG_CDROM
+  fprintf(stderr, "Added CD-ROM drive: %s\n", drive);
+#endif
+	}
+}
+
+#ifdef USE_MNTENT
+static void CheckMounts(const char *mtab)
+{
+	FILE *mntfp;
+	struct mntent *mntent;
+	struct stat stbuf;
+
+	mntfp = setmntent(mtab, "r");
+	if ( mntfp != NULL ) {
+		char *tmp, mnt_type[32], mnt_dev[1024];
+
+		while ( (mntent=getmntent(mntfp)) != NULL ) {
+			/* Warning, possible buffer overflow.. */
+			strcpy(mnt_type, mntent->mnt_type);
+			strcpy(mnt_dev, mntent->mnt_fsname);
+
+			/* Handle "supermount" filesystem mounts */
+			if ( strcmp(mnt_type, MNTTYPE_SUPER) == 0 ) {
+				tmp = strstr(mntent->mnt_opts, "fs=");
+				if ( tmp ) {
+					strcpy(mnt_type, tmp+strlen("fs="));
+					tmp = strchr(mnt_type, ',');
+					if ( tmp ) {
+						*tmp = '\0';
+					}
+				}
+				tmp = strstr(mntent->mnt_opts, "dev=");
+				if ( tmp ) {
+					strcpy(mnt_dev, tmp+strlen("dev="));
+					tmp = strchr(mnt_dev, ',');
+					if ( tmp ) {
+						*tmp = '\0';
+					}
+				}
+			}
+			if ( strcmp(mnt_type, MNTTYPE_CDROM) == 0 ) {
+#ifdef DEBUG_CDROM
+  fprintf(stderr, "Checking mount path from %s: %s mounted on %s of %s\n",
+	mtab, mnt_dev, mntent->mnt_dir, mnt_type);
+#endif
+				if (CheckDrive(mnt_dev, mnt_type, &stbuf) > 0) {
+					AddDrive(mnt_dev, &stbuf);
+				}
+			}
+		}
+		endmntent(mntfp);
+	}
+}
+#endif /* USE_MNTENT */
+
+int  SDL_SYS_CDInit(void)
+{
+	/* checklist: /dev/cdrom, /dev/hd?, /dev/scd? /dev/sr? */
+	static char *checklist[] = {
+		"cdrom", "?a hd?", "?0 scd?", "?0 sr?", 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 = getenv("SDL_CDROM");	/* ':' separated list of devices */
+	if ( SDLcdrom != NULL ) {
+		char *cdpath, *delim;
+		cdpath = malloc(strlen(SDLcdrom)+1);
+		if ( cdpath != NULL ) {
+			strcpy(cdpath, SDLcdrom);
+			SDLcdrom = cdpath;
+			do {
+				delim = strchr(SDLcdrom, ':');
+				if ( delim ) {
+					*delim++ = '\0';
+				}
+#ifdef DEBUG_CDROM
+  fprintf(stderr, "Checking CD-ROM drive from SDL_CDROM: %s\n", SDLcdrom);
+#endif
+				if ( CheckDrive(SDLcdrom, NULL, &stbuf) > 0 ) {
+					AddDrive(SDLcdrom, &stbuf);
+				}
+				if ( delim ) {
+					SDLcdrom = delim;
+				} else {
+					SDLcdrom = NULL;
+				}
+			} while ( SDLcdrom );
+			free(cdpath);
+		}
+
+		/* If we found our drives, there's nothing left to do */
+		if ( SDL_numcds > 0 ) {
+			return(0);
+		}
+	}
+
+#ifdef USE_MNTENT
+	/* Check /dev/cdrom first :-) */
+	if (CheckDrive("/dev/cdrom", NULL, &stbuf) > 0) {
+		AddDrive("/dev/cdrom", &stbuf);
+	}
+
+	/* Now check the currently mounted CD drives */
+	CheckMounts(_PATH_MOUNTED);
+
+	/* Finally check possible mountable drives in /etc/fstab */
+	CheckMounts(_PATH_MNTTAB);
+
+	/* If we found our drives, there's nothing left to do */
+	if ( SDL_numcds > 0 ) {
+		return(0);
+	}
+#endif /* USE_MNTENT */
+
+	/* Scan the system for CD-ROM drives.
+	   Not always 100% reliable, so use the USE_MNTENT code above first.
+	 */
+	for ( i=0; checklist[i]; ++i ) {
+		if ( checklist[i][0] == '?' ) {
+			char *insert;
+			exists = 1;
+			for ( j=checklist[i][1]; exists; ++j ) {
+				sprintf(drive, "/dev/%s", &checklist[i][3]);
+				insert = strchr(drive, '?');
+				if ( insert != NULL ) {
+					*insert = j;
+				}
+#ifdef DEBUG_CDROM
+  fprintf(stderr, "Checking possible CD-ROM drive: %s\n", drive);
+#endif
+				switch (CheckDrive(drive, NULL, &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 {
+			sprintf(drive, "/dev/%s", checklist[i]);
+#ifdef DEBUG_CDROM
+  fprintf(stderr, "Checking possible CD-ROM drive: %s\n", drive);
+#endif
+			if ( CheckDrive(drive, NULL, &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 cdrom_tochdr toc;
+	int i, okay;
+	struct cdrom_tocentry entry;
+
+	okay = 0;
+	if ( SDL_SYS_CDioctl(cdrom->id, CDROMREADTOCHDR, &toc) == 0 ) {
+		cdrom->numtracks = toc.cdth_trk1-toc.cdth_trk0+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 = CDROM_LEADOUT;
+			} else {
+				cdrom->track[i].id = toc.cdth_trk0+i;
+			}
+			entry.cdte_track = cdrom->track[i].id;
+			entry.cdte_format = CDROM_MSF;
+			if ( SDL_SYS_CDioctl(cdrom->id, CDROMREADTOCENTRY,
+								&entry) < 0 ) {
+				break;
+			} else {
+				if ( entry.cdte_ctrl & CDROM_DATA_TRACK ) {
+					cdrom->track[i].type = SDL_DATA_TRACK;
+				} else {
+					cdrom->track[i].type = SDL_AUDIO_TRACK;
+				}
+				cdrom->track[i].offset = MSF_TO_FRAMES(
+						entry.cdte_addr.msf.minute,
+						entry.cdte_addr.msf.second,
+						entry.cdte_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 cdrom_tochdr toc;
+	struct cdrom_subchnl info;
+
+	info.cdsc_format = CDROM_MSF;
+	if ( ioctl(cdrom->id, CDROMSUBCHNL, &info) < 0 ) {
+		if ( ERRNO_TRAYEMPTY(errno) ) {
+			status = CD_TRAYEMPTY;
+		} else {
+			status = CD_ERROR;
+		}
+	} else {
+		switch (info.cdsc_audiostatus) {
+			case CDROM_AUDIO_INVALID:
+			case CDROM_AUDIO_NO_STATUS:
+				/* Try to determine if there's a CD available */
+				if (ioctl(cdrom->id, CDROMREADTOCHDR, &toc)==0)
+					status = CD_STOPPED;
+				else
+					status = CD_TRAYEMPTY;
+				break;
+			case CDROM_AUDIO_COMPLETED:
+				status = CD_STOPPED;
+				break;
+			case CDROM_AUDIO_PLAY:
+				status = CD_PLAYING;
+				break;
+			case CDROM_AUDIO_PAUSED:
+				/* Workaround buggy CD-ROM drive */
+				if ( info.cdsc_trk == CDROM_LEADOUT ) {
+					status = CD_STOPPED;
+				} else {
+					status = CD_PAUSED;
+				}
+				break;
+			default:
+				status = CD_ERROR;
+				break;
+		}
+	}
+	if ( position ) {
+		if ( status == CD_PLAYING || (status == CD_PAUSED) ) {
+			*position = MSF_TO_FRAMES(
+					info.cdsc_absaddr.msf.minute,
+					info.cdsc_absaddr.msf.second,
+					info.cdsc_absaddr.msf.frame);
+		} else {
+			*position = 0;
+		}
+	}
+	return(status);
+}
+
+/* Start play */
+static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length)
+{
+	struct cdrom_msf playtime;
+
+	FRAMES_TO_MSF(start,
+	   &playtime.cdmsf_min0, &playtime.cdmsf_sec0, &playtime.cdmsf_frame0);
+	FRAMES_TO_MSF(start+length,
+	   &playtime.cdmsf_min1, &playtime.cdmsf_sec1, &playtime.cdmsf_frame1);
+#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
+	return(SDL_SYS_CDioctl(cdrom->id, CDROMPLAYMSF, &playtime));
+}
+
+/* Pause play */
+static int SDL_SYS_CDPause(SDL_CD *cdrom)
+{
+	return(SDL_SYS_CDioctl(cdrom->id, CDROMPAUSE, 0));
+}
+
+/* Resume play */
+static int SDL_SYS_CDResume(SDL_CD *cdrom)
+{
+	return(SDL_SYS_CDioctl(cdrom->id, CDROMRESUME, 0));
+}
+
+/* Stop play */
+static int SDL_SYS_CDStop(SDL_CD *cdrom)
+{
+	return(SDL_SYS_CDioctl(cdrom->id, CDROMSTOP, 0));
+}
+
+/* Eject the CD-ROM */
+static int SDL_SYS_CDEject(SDL_CD *cdrom)
+{
+	return(SDL_SYS_CDioctl(cdrom->id, CDROMEJECT, 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 ) {
+			free(SDL_cdlist[i]);
+		}
+		SDL_numcds = 0;
+	}
+}
+