| /* |
| 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_QNX |
| |
| /* Functions for system-level CD-ROM audio control */ |
| |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #include <sys/ioctl.h> |
| #include <fcntl.h> |
| #include <errno.h> |
| #include <unistd.h> |
| #include <sys/cdrom.h> |
| #include <sys/dcmd_cam.h> |
| |
| #include "SDL_timer.h" |
| #include "SDL_cdrom.h" |
| #include "../SDL_syscdrom.h" |
| |
| /* The maximum number of CD-ROM drives we'll detect */ |
| #define MAX_DRIVES 16 |
| |
| #define QNX_CD_OPENMODE O_RDONLY | O_EXCL |
| |
| /* A list of available CD-ROM drives */ |
| static char *SDL_cdlist[MAX_DRIVES]; |
| static dev_t SDL_cdmode[MAX_DRIVES]; |
| static int SDL_cdopen[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); |
| |
| /* Check a drive to see if it is a CD-ROM */ |
| static int CheckDrive(char *drive, struct stat *stbuf) |
| { |
| int is_cd, cdfd; |
| cam_devinfo_t dinfo; |
| int devctlret=0; |
| |
| int atapi; |
| int removable; |
| int cdb10; |
| |
| /* 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, QNX_CD_OPENMODE); |
| if ( cdfd >= 0 ) |
| { |
| devctlret=devctl(cdfd, DCMD_CAM_DEVINFO, &dinfo, sizeof(cam_devinfo_t), NULL); |
| |
| if (devctlret==EOK) |
| { |
| atapi=dinfo.flags & DEV_ATAPI; |
| removable=dinfo.flags & DEV_REMOVABLE; |
| cdb10=dinfo.flags & DEV_CDB_10; /* I'm not sure about that flag */ |
| |
| /* in the near future need to add more checks for splitting cdroms from other devices */ |
| if ((atapi)&&(removable)) |
| { |
| 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]) |
| { |
| 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; |
| } |
| } |
| |
| int SDL_SYS_CDInit(void) |
| { |
| /* checklist: /dev/cdrom, /dev/cd?, /dev/scd? */ |
| static char *checklist[]={"cdrom", "?0 cd?", "?1 cd?", "?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; |
| |
| /* clearing device open status */ |
| for (i=0; i<MAX_DRIVES; i++) |
| { |
| SDL_cdopen[i]=0; |
| } |
| |
| /* 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/%s", &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); |
| } |
| |
| static const char *SDL_SYS_CDName(int drive) |
| { |
| return(SDL_cdlist[drive]); |
| } |
| |
| static int SDL_SYS_CDOpen(int drive) |
| { |
| int handle; |
| |
| handle=open(SDL_cdlist[drive], QNX_CD_OPENMODE); |
| |
| if (handle>0) |
| { |
| SDL_cdopen[drive]=handle; |
| } |
| |
| return (handle); |
| } |
| |
| static int SDL_SYS_CDGetTOC(SDL_CD *cdrom) |
| { |
| cdrom_read_toc_t toc; |
| int i, okay; |
| |
| okay = 0; |
| if (devctl(cdrom->id, DCMD_CAM_CDROMREADTOC, &toc, sizeof(toc), NULL) == 0) |
| { |
| cdrom->numtracks = toc.last_track - toc.first_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 = CDROM_LEADOUT; |
| } |
| else |
| { |
| cdrom->track[i].id = toc.first_track+i; |
| } |
| |
| cdrom->track[i].type = toc.toc_entry[i].control_adr & 0x0F; |
| cdrom->track[i].offset = toc.toc_entry[i].addr.lba; |
| 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; |
| |
| cdrom_read_toc_t toc; |
| cdrom_subch_data_t info; |
| cam_devinfo_t dinfo; |
| |
| int devctlret=0; |
| int drive=-1; |
| int i; |
| int eagaincnt=0; |
| |
| /* check media presence before read subchannel call, some cdroms can lockups */ |
| /* if no media, while calling read subchannel functions. */ |
| devctlret=devctl(cdrom->id, DCMD_CAM_DEVINFO, &dinfo, sizeof(cam_devinfo_t), NULL); |
| |
| if (devctlret==EOK) |
| { |
| if ((dinfo.flags & DEV_NO_MEDIA)!=0) |
| { |
| status = CD_TRAYEMPTY; |
| if (position) |
| { |
| *position = 0; |
| } |
| return (status); |
| } |
| } |
| |
| /* if media exists, then do other stuff */ |
| |
| SDL_memset(&info, 0x00, sizeof(info)); |
| info.subch_command.data_format = CDROM_SUBCH_CURRENT_POSITION; |
| |
| do { |
| devctlret=devctl(cdrom->id, DCMD_CAM_CDROMSUBCHNL, &info, sizeof(info), NULL); |
| if (devctlret==EIO) |
| { |
| /* big workaround for media change, handle is unusable after that, |
| that bug was found in QNX 6.2, 6.2.1 is not released yet. */ |
| |
| for (i=0; i<MAX_DRIVES; i++) |
| { |
| if (SDL_cdopen[i]==cdrom->id) |
| { |
| drive=i; |
| break; |
| } |
| } |
| if (drive==-1) |
| { |
| /* that cannot happen, but ... */ |
| break; |
| } |
| close(cdrom->id); |
| cdrom->id=open(SDL_cdlist[drive], QNX_CD_OPENMODE); |
| devctlret=EAGAIN; |
| } |
| if (devctlret==EAGAIN) |
| { |
| eagaincnt++; |
| } |
| if (eagaincnt==2) |
| { |
| /* workaround for broken cdroms, which can return always EAGAIN when its not ready, */ |
| /* that mean errornous media or just no media avail */ |
| devctlret=ENXIO; |
| break; |
| } |
| } while ((devctlret==EAGAIN)||(devctlret==ESTALE)); |
| |
| if (devctlret != 0) |
| { |
| if (devctlret==ENXIO) |
| { |
| status = CD_TRAYEMPTY; |
| } |
| else |
| { |
| status = CD_ERROR; |
| } |
| } |
| else |
| { |
| switch (info.current_position.header.audio_status) |
| { |
| case CDROM_AUDIO_INVALID: |
| case CDROM_AUDIO_NO_STATUS: |
| /* Try to determine if there's a CD available */ |
| if (devctl(cdrom->id, DCMD_CAM_CDROMREADTOC, &toc, sizeof(toc), NULL)==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.current_position.data_format == 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.current_position.addr.msf.minute, |
| info.current_position.addr.msf.second, |
| info.current_position.addr.msf.frame); |
| } |
| else |
| { |
| *position = 0; |
| } |
| } |
| |
| return (status); |
| } |
| |
| /* Start play */ |
| static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length) |
| { |
| cdrom_playmsf_t playtime; |
| |
| FRAMES_TO_MSF(start, &playtime.start_minute, &playtime.start_second, &playtime.start_frame); |
| FRAMES_TO_MSF(start+length, &playtime.end_minute, &playtime.end_second, &playtime.end_frame); |
| |
| if (devctl(cdrom->id, DCMD_CAM_CDROMPLAYMSF, &playtime, sizeof(playtime), NULL) != 0) |
| { |
| return -1; |
| } |
| else |
| { |
| return 0; |
| } |
| } |
| |
| /* Pause play */ |
| static int SDL_SYS_CDPause(SDL_CD *cdrom) |
| { |
| if (devctl(cdrom->id, DCMD_CAM_CDROMPAUSE, NULL, 0, NULL)!=0) |
| { |
| return -1; |
| } |
| else |
| { |
| return 0; |
| } |
| } |
| |
| /* Resume play */ |
| static int SDL_SYS_CDResume(SDL_CD *cdrom) |
| { |
| if (devctl(cdrom->id, DCMD_CAM_CDROMRESUME, NULL, 0, NULL)!=0) |
| { |
| return -1; |
| } |
| else |
| { |
| return 0; |
| } |
| } |
| |
| /* Stop play */ |
| static int SDL_SYS_CDStop(SDL_CD *cdrom) |
| { |
| if (devctl(cdrom->id, DCMD_CAM_CDROMSTOP, NULL, 0, NULL)!=0) |
| { |
| return -1; |
| } |
| else |
| { |
| return 0; |
| } |
| } |
| |
| /* Eject the CD-ROM */ |
| static int SDL_SYS_CDEject(SDL_CD *cdrom) |
| { |
| if (devctl(cdrom->id, DCMD_CAM_EJECT_MEDIA, NULL, 0, NULL)!=0) |
| { |
| return -1; |
| } |
| else |
| { |
| return 0; |
| } |
| } |
| |
| /* Close the CD-ROM handle */ |
| static void SDL_SYS_CDClose(SDL_CD *cdrom) |
| { |
| int i; |
| |
| for (i=0; i<MAX_DRIVES; i++) |
| { |
| if (SDL_cdopen[i]==cdrom->id) |
| { |
| SDL_cdopen[i]=0; |
| break; |
| } |
| } |
| |
| 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_QNX */ |
