src/cdrom/mint/SDL_syscdrom.c - third_party/sdl - Git at Google

 /*
     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 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
     slouken@libsdl.org
 */
 #include "SDL_config.h"

 #ifdef SDL_CDROM_MINT

 /*
 	Atari MetaDOS CD-ROM functions

 	Patrice Mandin
 */

 #include <errno.h>

 #include <cdromio.h>
 #include <metados.h>

 #include "SDL_cdrom.h"
 #include "../SDL_syscdrom.h"

 /* 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))

 /* The maximum number of CD-ROM drives we'll detect */
 #define MAX_DRIVES	32

 typedef struct
 {
     unsigned char device[3];    /* Physical device letter + ':' + '\0' */
     metaopen_t metaopen;        /* Infos on opened drive */
 } metados_drive_t;

 static metados_drive_t metados_drives[MAX_DRIVES];

 /* The system-dependent CD control functions */
 static const char *SDL_SYS_CDName(int drive);
 static int SDL_SYS_CDOpen(int drive);
 static void SDL_SYS_CDClose(SDL_CD * cdrom);
 static int SDL_SYS_CDioctl(int id, int command, void *arg);
 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);

 int
 SDL_SYS_CDInit(void)
 {
     metainit_t metainit = { 0, 0, 0, 0 };
     metaopen_t metaopen;
     int i, handle;
     struct cdrom_subchnl info;

     Metainit(&metainit);
     if (metainit.version == NULL) {
 #ifdef DEBUG_CDROM
         fprintf(stderr, "MetaDOS not installed\n");
 #endif
         return -1;
     }

     if (metainit.drives_map == 0) {
 #ifdef DEBUG_CDROM
         fprintf(stderr, "No MetaDOS devices present\n");
 #endif
         return -1;
     }

     SDL_numcds = 0;

     for (i = 'A'; i <= 'Z'; i++) {
         metados_drives[SDL_numcds].device[0] = 0;
         metados_drives[SDL_numcds].device[1] = ':';
         metados_drives[SDL_numcds].device[2] = 0;

         if (metainit.drives_map & (1 << (i - 'A'))) {
             handle = Metaopen(i, &metaopen);
             if (handle == 0) {

                 info.cdsc_format = CDROM_MSF;
                 if ((Metaioctl
                      (i, METADOS_IOCTL_MAGIC, CDROMSUBCHNL, &info) == 0)
                     || ERRNO_TRAYEMPTY(errno)) {
                     metados_drives[SDL_numcds].device[0] = i;
                     ++SDL_numcds;
                 }

                 Metaclose(i);
             }
         }
     }

     /* Fill in our driver capabilities */
     SDL_CDcaps.Name = SDL_SYS_CDName;
     SDL_CDcaps.Open = SDL_SYS_CDOpen;
     SDL_CDcaps.Close = SDL_SYS_CDClose;

     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;

     return 0;
 }

 void
 SDL_SYS_CDQuit(void)
 {
     SDL_numcds = 0;
 }

 static const char *
 SDL_SYS_CDName(int drive)
 {
     return (metados_drives[drive].device);
 }

 static int
 SDL_SYS_CDOpen(int drive)
 {
     int handle;

     handle =
         Metaopen(metados_drives[drive].device[0],
                  &(metados_drives[drive].metaopen));
     if (handle == 0) {
         return drive;
     }

     return -1;
 }

 static void
 SDL_SYS_CDClose(SDL_CD * cdrom)
 {
     Metaclose(metados_drives[cdrom->id].device[0]);
 }

 static int
 SDL_SYS_CDioctl(int id, int command, void *arg)
 {
     int retval;

     retval =
         Metaioctl(metados_drives[id].device[0], METADOS_IOCTL_MAGIC, command,
                   arg);
     if (retval < 0) {
         SDL_SetError("ioctl() error: %s", strerror(errno));
     }
     return (retval);
 }

 static int
 SDL_SYS_CDGetTOC(SDL_CD * cdrom)
 {
     int i, okay;
     struct cdrom_tochdr toc;
     struct cdrom_tocentry entry;

     /* Use standard ioctl() */
     if (SDL_SYS_CDioctl(cdrom->id, CDROMREADTOCHDR, &toc) < 0) {
         return -1;
     }

     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 */
     okay = 1;
     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) {
             okay = 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;
             }
         }
     }

     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 (SDL_SYS_CDioctl(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 (SDL_SYS_CDioctl(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);
 }

 #endif /* SDL_CDROM_MINT */
 /* vi: set ts=4 sw=4 expandtab: */
	/*
	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 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
	slouken@libsdl.org
	*/
	#include "SDL_config.h"

	#ifdef SDL_CDROM_MINT

	/*
	Atari MetaDOS CD-ROM functions

	Patrice Mandin
	*/

	#include <errno.h>

	#include <cdromio.h>
	#include <metados.h>

	#include "SDL_cdrom.h"
	#include "../SDL_syscdrom.h"

	/* 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))

	/* The maximum number of CD-ROM drives we'll detect */
	#define MAX_DRIVES 32

	typedef struct
	{
	unsigned char device[3]; /* Physical device letter + ':' + '\0' */
	metaopen_t metaopen; /* Infos on opened drive */
	} metados_drive_t;

	static metados_drive_t metados_drives[MAX_DRIVES];

	/* The system-dependent CD control functions */
	static const char *SDL_SYS_CDName(int drive);
	static int SDL_SYS_CDOpen(int drive);
	static void SDL_SYS_CDClose(SDL_CD * cdrom);
	static int SDL_SYS_CDioctl(int id, int command, void *arg);
	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);

	int
	SDL_SYS_CDInit(void)
	{
	metainit_t metainit = { 0, 0, 0, 0 };
	metaopen_t metaopen;
	int i, handle;
	struct cdrom_subchnl info;

	Metainit(&metainit);
	if (metainit.version == NULL) {
	#ifdef DEBUG_CDROM
	fprintf(stderr, "MetaDOS not installed\n");
	#endif
	return -1;
	}

	if (metainit.drives_map == 0) {
	#ifdef DEBUG_CDROM
	fprintf(stderr, "No MetaDOS devices present\n");
	#endif
	return -1;
	}

	SDL_numcds = 0;

	for (i = 'A'; i <= 'Z'; i++) {
	metados_drives[SDL_numcds].device[0] = 0;
	metados_drives[SDL_numcds].device[1] = ':';
	metados_drives[SDL_numcds].device[2] = 0;

	if (metainit.drives_map & (1 << (i - 'A'))) {
	handle = Metaopen(i, &metaopen);
	if (handle == 0) {

	info.cdsc_format = CDROM_MSF;
	if ((Metaioctl
	(i, METADOS_IOCTL_MAGIC, CDROMSUBCHNL, &info) == 0)
	\|\| ERRNO_TRAYEMPTY(errno)) {
	metados_drives[SDL_numcds].device[0] = i;
	++SDL_numcds;
	}

	Metaclose(i);
	}
	}
	}

	/* Fill in our driver capabilities */
	SDL_CDcaps.Name = SDL_SYS_CDName;
	SDL_CDcaps.Open = SDL_SYS_CDOpen;
	SDL_CDcaps.Close = SDL_SYS_CDClose;

	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;

	return 0;
	}

	void
	SDL_SYS_CDQuit(void)
	{
	SDL_numcds = 0;
	}

	static const char *
	SDL_SYS_CDName(int drive)
	{
	return (metados_drives[drive].device);
	}

	static int
	SDL_SYS_CDOpen(int drive)
	{
	int handle;

	handle =
	Metaopen(metados_drives[drive].device[0],
	&(metados_drives[drive].metaopen));
	if (handle == 0) {
	return drive;
	}

	return -1;
	}

	static void
	SDL_SYS_CDClose(SDL_CD * cdrom)
	{
	Metaclose(metados_drives[cdrom->id].device[0]);
	}

	static int
	SDL_SYS_CDioctl(int id, int command, void *arg)
	{
	int retval;

	retval =
	Metaioctl(metados_drives[id].device[0], METADOS_IOCTL_MAGIC, command,
	arg);
	if (retval < 0) {
	SDL_SetError("ioctl() error: %s", strerror(errno));
	}
	return (retval);
	}

	static int
	SDL_SYS_CDGetTOC(SDL_CD * cdrom)
	{
	int i, okay;
	struct cdrom_tochdr toc;
	struct cdrom_tocentry entry;

	/* Use standard ioctl() */
	if (SDL_SYS_CDioctl(cdrom->id, CDROMREADTOCHDR, &toc) < 0) {
	return -1;
	}

	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 */
	okay = 1;
	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) {
	okay = 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;
	}
	}
	}

	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 (SDL_SYS_CDioctl(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 (SDL_SYS_CDioctl(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);
	}

	#endif /* SDL_CDROM_MINT */
	/* vi: set ts=4 sw=4 expandtab: */