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Diffstat (limited to 'distrib/sdl-1.2.12/src/cdrom/linux/SDL_syscdrom.c')
-rw-r--r--distrib/sdl-1.2.12/src/cdrom/linux/SDL_syscdrom.c564
1 files changed, 564 insertions, 0 deletions
diff --git a/distrib/sdl-1.2.12/src/cdrom/linux/SDL_syscdrom.c b/distrib/sdl-1.2.12/src/cdrom/linux/SDL_syscdrom.c
new file mode 100644
index 0000000..2535b28
--- /dev/null
+++ b/distrib/sdl-1.2.12/src/cdrom/linux/SDL_syscdrom.c
@@ -0,0 +1,564 @@
+/*
+ SDL - Simple DirectMedia Layer
+ Copyright (C) 1997-2006 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_LINUX
+
+/* Functions for system-level CD-ROM audio control */
+
+#include <string.h> /* For strerror() */
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <unistd.h>
+#ifdef __LINUX__
+#ifdef HAVE_LINUX_VERSION_H
+/* linux 2.6.9 workaround */
+#include <linux/version.h>
+#if LINUX_VERSION_CODE == KERNEL_VERSION(2,6,9)
+#include <asm/types.h>
+#define __le64 __u64
+#define __le32 __u32
+#define __le16 __u16
+#define __be64 __u64
+#define __be32 __u32
+#define __be16 __u16
+#endif /* linux 2.6.9 workaround */
+#endif /* HAVE_LINUX_VERSION_H */
+#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_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 */
+#ifndef ENOMEDIUM
+#define ENOMEDIUM ENOENT
+#endif
+#define ERRNO_TRAYEMPTY(errno) \
+ ((errno == EIO) || (errno == ENOENT) || \
+ (errno == EINVAL) || (errno == ENOMEDIUM))
+
+/* 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_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 && (SDL_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] = 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
+ }
+}
+
+#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;
+ char *mnt_type;
+ size_t mnt_type_len;
+ char *mnt_dev;
+ size_t mnt_dev_len;
+
+ while ( (mntent=getmntent(mntfp)) != NULL ) {
+ mnt_type_len = SDL_strlen(mntent->mnt_type) + 1;
+ mnt_type = SDL_stack_alloc(char, mnt_type_len);
+ if (mnt_type == NULL)
+ continue; /* maybe you'll get lucky next time. */
+
+ mnt_dev_len = SDL_strlen(mntent->mnt_fsname) + 1;
+ mnt_dev = SDL_stack_alloc(char, mnt_dev_len);
+ if (mnt_dev == NULL) {
+ SDL_stack_free(mnt_type);
+ continue;
+ }
+
+ SDL_strlcpy(mnt_type, mntent->mnt_type, mnt_type_len);
+ SDL_strlcpy(mnt_dev, mntent->mnt_fsname, mnt_dev_len);
+
+ /* Handle "supermount" filesystem mounts */
+ if ( SDL_strcmp(mnt_type, MNTTYPE_SUPER) == 0 ) {
+ tmp = SDL_strstr(mntent->mnt_opts, "fs=");
+ if ( tmp ) {
+ SDL_stack_free(mnt_type);
+ mnt_type = SDL_strdup(tmp + SDL_strlen("fs="));
+ if ( mnt_type ) {
+ tmp = SDL_strchr(mnt_type, ',');
+ if ( tmp ) {
+ *tmp = '\0';
+ }
+ }
+ }
+ tmp = SDL_strstr(mntent->mnt_opts, "dev=");
+ if ( tmp ) {
+ SDL_stack_free(mnt_dev);
+ mnt_dev = SDL_strdup(tmp + SDL_strlen("dev="));
+ if ( mnt_dev ) {
+ tmp = SDL_strchr(mnt_dev, ',');
+ if ( tmp ) {
+ *tmp = '\0';
+ }
+ }
+ }
+ }
+ if ( SDL_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);
+ }
+ }
+ SDL_stack_free(mnt_dev);
+ SDL_stack_free(mnt_type);
+ }
+ 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 = 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';
+ }
+#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 );
+ SDL_stack_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 ) {
+ SDL_snprintf(drive, SDL_arraysize(drive), "/dev/%s", &checklist[i][3]);
+ insert = SDL_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 {
+ SDL_snprintf(drive, SDL_arraysize(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_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 ) {
+ SDL_free(SDL_cdlist[i]);
+ }
+ SDL_numcds = 0;
+ }
+}
+
+#endif /* SDL_CDROM_LINUX */
generated by cgit v1.1 at 2024-12-22 17:16:39 +0000