/*

SDL - Simple DirectMedia Layer

This library is free software; you can redistribute it and/or

modify it under the terms of the GNU Library General Public

License as published by the Free Software Foundation; either

version 2 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

Library General Public License for more details.

You should have received a copy of the GNU Library General Public

License along with this library; if not, write to the Free

Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

Sam Lantinga

*/

#ifdef SAVE_RCSID

static char rcsid =

"@(#) $Id$";

#endif

/* Functions for system-level CD-ROM audio control */

#include <sys/types.h>

#include <stdlib.h>

#include <sys/stat.h>

#include <sys/ioctl.h>

#include <fcntl.h>

#include <stdio.h>

#include <errno.h>

#include <unistd.h>

#include <sys/cdrom.h>

#include <sys/dcmd_cam.h>

#include "SDL_error.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];

/* 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 */

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] = (char *)malloc(strlen(drive)+1);

if (SDL_cdlist[i] == NULL)

{

SDL_OutOfMemory();

return;

}

strcpy(SDL_cdlist[i], drive);

SDL_cdmode[i] = stbuf->st_rdev;

++SDL_numcds;

}

}

/* 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 = getenv("SDL_CDROM"); /* ':' separated list of devices */

if ( SDLcdrom != NULL )

{

char *cdpath, *delim;

cdpath = malloc(strlen(SDLcdrom)+1);

if (cdpath != NULL)

{

strcpy(cdpath, SDLcdrom);

SDLcdrom = cdpath;

do {

delim = strchr(SDLcdrom, ':');

if (delim)

{

*delim++ = '\0';

}

if (CheckDrive(SDLcdrom, &stbuf) > 0)

{

AddDrive(SDLcdrom, &stbuf);

}

if (delim)

{

SDLcdrom = delim;

}

else

{

SDLcdrom = NULL;

}

} while (SDLcdrom);

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 )

{

sprintf(drive, "/dev/%s", &checklist[i][3]);

insert = 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

{

sprintf(drive, "/dev/%s", checklist[i]);

if (CheckDrive(drive, &stbuf) > 0)

{

AddDrive(drive, &stbuf);

}

}

}

return(0);

}

static const char *SDL_SYS_CDName(int 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 */

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)

{

free(SDL_cdlist[i]);

}

SDL_numcds = 0;

}