diff options
Diffstat (limited to 'distrib/sdl-1.2.15/src/cdrom/openbsd/SDL_syscdrom.c')
| -rw-r--r-- | distrib/sdl-1.2.15/src/cdrom/openbsd/SDL_syscdrom.c | 416 |
1 files changed, 416 insertions, 0 deletions
diff --git a/distrib/sdl-1.2.15/src/cdrom/openbsd/SDL_syscdrom.c b/distrib/sdl-1.2.15/src/cdrom/openbsd/SDL_syscdrom.c new file mode 100644 index 0000000..e4d03a6 --- /dev/null +++ b/distrib/sdl-1.2.15/src/cdrom/openbsd/SDL_syscdrom.c @@ -0,0 +1,416 @@ +/* + 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_OPENBSD + +/* Functions for system-level CD-ROM audio control */ + +#include <sys/types.h> +#include <sys/ioctl.h> +#include <sys/stat.h> +#include <fcntl.h> +#include <errno.h> +#include <unistd.h> +#include <sys/ioctl.h> +#include <sys/cdio.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) || \ + (errno == ENODEV)) + +/* Check a drive to see if it is a CD-ROM */ +static int CheckDrive(char *drive, struct stat *stbuf) +{ + int is_cd, cdfd; + struct ioc_read_subchannel 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.address_format = CD_MSF_FORMAT; + info.data_format = CD_CURRENT_POSITION; + info.data_len = 0; + info.data = NULL; + /* Under Linux, EIO occurs when a disk is not present. + This isn't 100% reliable, so we use the USE_MNTENT + code above instead. + */ + if ( (ioctl(cdfd, CDIOCREADSUBCHANNEL, &info) == 0) || + ERRNO_TRAYEMPTY(errno) ) { + is_cd = 1; + } + close(cdfd); + } + else if (ERRNO_TRAYEMPTY(errno)) + is_cd = 1; + } + 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 + } +} + +int SDL_SYS_CDInit(void) +{ + static char *checklist[] = { +#if defined(__OPENBSD__) + "?0 cd?c", "cdrom", NULL +#elif defined(__NETBSD__) + "?0 cd?d", "?0 cd?c", "cdrom", NULL +#else + "?0 cd?c", "?0 acd?c", "cdrom", NULL +#endif + }; + 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'; + } + 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); +} + +/* 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 ioc_toc_header toc; + int i, okay; + struct ioc_read_toc_entry entry; + struct cd_toc_entry data; + + okay = 0; + if ( SDL_SYS_CDioctl(cdrom->id, CDIOREADTOCHEADER, &toc) == 0 ) { + cdrom->numtracks = toc.ending_track-toc.starting_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 = 0xAA; /* CDROM_LEADOUT */ + } else { + cdrom->track[i].id = toc.starting_track+i; + } + entry.starting_track = cdrom->track[i].id; + entry.address_format = CD_MSF_FORMAT; + entry.data_len = sizeof(data); + entry.data = &data; + if ( SDL_SYS_CDioctl(cdrom->id, CDIOREADTOCENTRYS, + &entry) < 0 ) { + break; + } else { + cdrom->track[i].type = data.control; + cdrom->track[i].offset = MSF_TO_FRAMES( + data.addr.msf.minute, + data.addr.msf.second, + data.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 ioc_toc_header toc; + struct ioc_read_subchannel info; + struct cd_sub_channel_info data; + + info.address_format = CD_MSF_FORMAT; + info.data_format = CD_CURRENT_POSITION; + info.track = 0; + info.data_len = sizeof(data); + info.data = &data; + if ( ioctl(cdrom->id, CDIOCREADSUBCHANNEL, &info) < 0 ) { + if ( ERRNO_TRAYEMPTY(errno) ) { + status = CD_TRAYEMPTY; + } else { + status = CD_ERROR; + } + } else { + switch (data.header.audio_status) { + case CD_AS_AUDIO_INVALID: + case CD_AS_NO_STATUS: + /* Try to determine if there's a CD available */ + if (ioctl(cdrom->id,CDIOREADTOCHEADER,&toc)==0) + status = CD_STOPPED; + else + status = CD_TRAYEMPTY; + break; + case CD_AS_PLAY_COMPLETED: + status = CD_STOPPED; + break; + case CD_AS_PLAY_IN_PROGRESS: + status = CD_PLAYING; + break; + case CD_AS_PLAY_PAUSED: + status = CD_PAUSED; + break; + default: + status = CD_ERROR; + break; + } + } + if ( position ) { + if ( status == CD_PLAYING || (status == CD_PAUSED) ) { + *position = MSF_TO_FRAMES( + data.what.position.absaddr.msf.minute, + data.what.position.absaddr.msf.second, + data.what.position.absaddr.msf.frame); + } else { + *position = 0; + } + } + return(status); +} + +/* Start play */ +static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length) +{ + struct ioc_play_msf playtime; + + FRAMES_TO_MSF(start, + &playtime.start_m, &playtime.start_s, &playtime.start_f); + FRAMES_TO_MSF(start+length, + &playtime.end_m, &playtime.end_s, &playtime.end_f); +#ifdef DEBUG_CDROM + fprintf(stderr, "Trying to play from %d:%d:%d to %d:%d:%d\n", + playtime.start_m, playtime.start_s, playtime.start_f, + playtime.end_m, playtime.end_s, playtime.end_f); +#endif + ioctl(cdrom->id, CDIOCSTART, 0); + return(SDL_SYS_CDioctl(cdrom->id, CDIOCPLAYMSF, &playtime)); +} + +/* Pause play */ +static int SDL_SYS_CDPause(SDL_CD *cdrom) +{ + return(SDL_SYS_CDioctl(cdrom->id, CDIOCPAUSE, 0)); +} + +/* Resume play */ +static int SDL_SYS_CDResume(SDL_CD *cdrom) +{ + return(SDL_SYS_CDioctl(cdrom->id, CDIOCRESUME, 0)); +} + +/* Stop play */ +static int SDL_SYS_CDStop(SDL_CD *cdrom) +{ + return(SDL_SYS_CDioctl(cdrom->id, CDIOCSTOP, 0)); +} + +/* Eject the CD-ROM */ +static int SDL_SYS_CDEject(SDL_CD *cdrom) +{ + SDL_SYS_CDioctl(cdrom->id, CDIOCALLOW, 0); + return(SDL_SYS_CDioctl(cdrom->id, CDIOCEJECT, 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_OPENBSD */ |