From 9682c8870b8ff5e4ac2e4c70b759f791c6f38c1f Mon Sep 17 00:00:00 2001 From: Jesse Hall Date: Mon, 9 Jul 2012 11:27:07 -0700 Subject: Import SDL release-1.2.15 Change-Id: I505c4aea24325cad475f217db5589814b4c75dbf --- distrib/sdl-1.2.15/src/cdrom/linux/SDL_syscdrom.c | 564 ++++++++++++++++++++++ 1 file changed, 564 insertions(+) create mode 100644 distrib/sdl-1.2.15/src/cdrom/linux/SDL_syscdrom.c (limited to 'distrib/sdl-1.2.15/src/cdrom/linux/SDL_syscdrom.c') diff --git a/distrib/sdl-1.2.15/src/cdrom/linux/SDL_syscdrom.c b/distrib/sdl-1.2.15/src/cdrom/linux/SDL_syscdrom.c new file mode 100644 index 0000000..6804057 --- /dev/null +++ b/distrib/sdl-1.2.15/src/cdrom/linux/SDL_syscdrom.c @@ -0,0 +1,564 @@ +/* + SDL - Simple DirectMedia Layer + Copyright (C) 1997-2012 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 /* For strerror() */ +#include +#include +#include +#include +#include +#include +#ifdef __LINUX__ +#ifdef HAVE_LINUX_VERSION_H +/* linux 2.6.9 workaround */ +#include +#if LINUX_VERSION_CODE == KERNEL_VERSION(2,6,9) +#include +#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 +#endif +#ifdef __SVR4 +#include +#endif + +/* Define this to use the alternative getmntent() code */ +#ifndef __SVR4 +#define USE_MNTENT +#endif + +#ifdef USE_MNTENT +#if defined(__USLC__) +#include +#else +#include +#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; ist_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