diff options
Diffstat (limited to 'distrib/sdl-1.2.15/src/cdrom/qnx/SDL_syscdrom.c')
| -rw-r--r-- | distrib/sdl-1.2.15/src/cdrom/qnx/SDL_syscdrom.c | 551 |
1 files changed, 551 insertions, 0 deletions
diff --git a/distrib/sdl-1.2.15/src/cdrom/qnx/SDL_syscdrom.c b/distrib/sdl-1.2.15/src/cdrom/qnx/SDL_syscdrom.c new file mode 100644 index 0000000..0e38b79 --- /dev/null +++ b/distrib/sdl-1.2.15/src/cdrom/qnx/SDL_syscdrom.c @@ -0,0 +1,551 @@ +/* + 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_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 */ |