/*

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

slouken@libsdl.org

*/

/*

Atari MetaDOS CD-ROM functions

Patrice Mandin

*/

#include <errno.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <cdromio.h>

#include <metados.h>

#include "SDL_error.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;

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)

{

}

/* Resume play */

static int SDL_SYS_CDResume(SDL_CD *cdrom)

{

}

/* Stop play */

static int SDL_SYS_CDStop(SDL_CD *cdrom)

{

}

/* Eject the CD-ROM */

static int SDL_SYS_CDEject(SDL_CD *cdrom)

{