466 lines
12 KiB
C
466 lines
12 KiB
C
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/*
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SDL - Simple DirectMedia Layer
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Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not, write to the Free
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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Sam Lantinga
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slouken@libsdl.org
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*/
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#ifdef SAVE_RCSID
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static char rcsid =
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"@(#) $Id$";
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#endif
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/*
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Atari MetaDOS CD-ROM functions
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Patrice Mandin
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*/
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <cdromio.h>
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#include <metados.h>
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#include "SDL_error.h"
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#include "SDL_cdrom.h"
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#include "SDL_syscdrom.h"
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/* The maximum number of CD-ROM drives we'll detect */
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#define MAX_DRIVES 32
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/* Type of CD-ROM drive */
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#define DRIVE_TYPE_NOCD -1
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#define DRIVE_TYPE_STANDARD 0
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#define DRIVE_TYPE_CDAR 1
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typedef struct {
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int type; /* Standard, or old CDAR-type CD drive ? */
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unsigned char device[3]; /* Physical device letter + ':' + '\0' */
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metaopen_t metaopen; /* Infos on opened drive */
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} metados_drive_t;
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static metados_drive_t metados_drives[MAX_DRIVES];
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/* The system-dependent CD control functions */
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static const char *SDL_SYS_CDName(int drive);
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static int SDL_SYS_CDOpen(int drive);
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static void SDL_SYS_CDClose(SDL_CD *cdrom);
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static int SDL_SYS_CDioctl(int id, int command, void *arg);
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/* Commands using ioctl() */
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static int SDL_SYS_CDGetTOC(SDL_CD *cdrom);
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static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position);
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static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length);
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static int SDL_SYS_CDPause(SDL_CD *cdrom);
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static int SDL_SYS_CDResume(SDL_CD *cdrom);
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static int SDL_SYS_CDStop(SDL_CD *cdrom);
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static int SDL_SYS_CDEject(SDL_CD *cdrom);
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/* Commands using Meta*() CDAR functions */
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static int SDL_SYS_CD_BcdToBinary(int value);
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static int SDL_SYS_CDGetTOC_CDAR(SDL_CD *cdrom);
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static CDstatus SDL_SYS_CDStatus_CDAR(SDL_CD *cdrom, int *position);
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int SDL_SYS_CDInit(void)
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{
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metainit_t metainit={0,0,0,0};
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metaopen_t metaopen;
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int i, handle;
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Metainit(&metainit);
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if (metainit.version == NULL) {
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#ifdef DEBUG_CDROM
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fprintf(stderr, "MetaDOS not installed\n");
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#endif
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return -1;
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}
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if (metainit.drives_map == 0) {
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#ifdef DEBUG_CDROM
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fprintf(stderr, "No MetaDOS devices present\n");
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#endif
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return -1;
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}
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SDL_numcds = 0;
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for (i='A'; i<='Z'; i++) {
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metados_drives[SDL_numcds].type = DRIVE_TYPE_NOCD;
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metados_drives[SDL_numcds].device[0] = 0;
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metados_drives[SDL_numcds].device[1] = ':';
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metados_drives[SDL_numcds].device[2] = 0;
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if (metainit.drives_map & (1<<(i-'A'))) {
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handle = Metaopen(i, &metaopen);
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if (handle == 0) {
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if ( (metaopen.name[0]=='C') && (metaopen.name[1]=='D') &&
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(metaopen.name[2]=='A') && (metaopen.name[3]=='R')) {
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/* Drive compatible with CDAR */
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metados_drives[SDL_numcds].type = DRIVE_TYPE_CDAR;
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metados_drives[SDL_numcds].device[0] = i;
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++SDL_numcds;
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} else {
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/* Check for a CD-ROM device */
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if ((Metastatus(i, NULL) & 0x7fff) >= 0) {
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/* Drive compatible with new ioctl functions */
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metados_drives[SDL_numcds].type = DRIVE_TYPE_STANDARD;
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metados_drives[SDL_numcds].device[0] = i;
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++SDL_numcds;
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}
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}
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Metaclose(i);
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}
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}
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}
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/* Fill in our driver capabilities */
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SDL_CDcaps.Name = SDL_SYS_CDName;
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SDL_CDcaps.Open = SDL_SYS_CDOpen;
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SDL_CDcaps.Close = SDL_SYS_CDClose;
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SDL_CDcaps.GetTOC = SDL_SYS_CDGetTOC;
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SDL_CDcaps.Status = SDL_SYS_CDStatus;
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SDL_CDcaps.Play = SDL_SYS_CDPlay;
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SDL_CDcaps.Pause = SDL_SYS_CDPause;
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SDL_CDcaps.Resume = SDL_SYS_CDResume;
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SDL_CDcaps.Stop = SDL_SYS_CDStop;
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SDL_CDcaps.Eject = SDL_SYS_CDEject;
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return 0;
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}
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void SDL_SYS_CDQuit(void)
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{
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SDL_numcds = 0;
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}
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static const char *SDL_SYS_CDName(int drive)
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{
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return(metados_drives[drive].device);
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}
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static int SDL_SYS_CDOpen(int drive)
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{
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int handle;
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handle = Metaopen(metados_drives[drive].device[0], &(metados_drives[drive].metaopen));
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if (handle == 0) {
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return drive;
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}
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return -1;
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}
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static void SDL_SYS_CDClose(SDL_CD *cdrom)
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{
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Metaclose(metados_drives[cdrom->id].device[0]);
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}
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static int SDL_SYS_CDioctl(int id, int command, void *arg)
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{
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int retval;
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retval = Metaioctl(metados_drives[id].device[0], METADOS_IOCTL_MAGIC, command, arg);
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if ( retval < 0 ) {
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SDL_SetError("ioctl() error: %s", strerror(errno));
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}
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return(retval);
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}
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static int SDL_SYS_CD_BcdToBinary(int value)
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{
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int tmp;
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tmp = (value>>4) & 0xf;
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return (tmp*10)+(value & 0xf);
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}
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static int SDL_SYS_CDGetTOC_CDAR(SDL_CD *cdrom)
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{
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int errorcode, i, minute, second, frame;
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metatocentry_t *toc_entries;
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metadiscinfo_t disc_info;
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/* First, read disc info */
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errorcode = Metadiscinfo(metados_drives[cdrom->id].device[0], &disc_info);
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if (errorcode<0) {
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#ifdef DEBUG_CDROM
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fprintf(stderr, "Can not read disc info\n");
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#endif
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return -1;
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}
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cdrom->numtracks = disc_info.last - disc_info.first + 1;
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/* Then read toc entries for tracks */
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toc_entries = (metatocentry_t *)malloc(100*sizeof(metatocentry_t));
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if (toc_entries == NULL) {
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#ifdef DEBUG_CDROM
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fprintf(stderr, "Can not allocate memory for TOC entries\n");
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#endif
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return -1;
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}
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errorcode = Metagettoc(metados_drives[cdrom->id].device[0], 0, toc_entries);
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if (errorcode<0) {
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#ifdef DEBUG_CDROM
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fprintf(stderr, "Can not read TOC\n");
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#endif
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free(toc_entries);
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return -1;
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}
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i=0;
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for (;;) {
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if ((toc_entries[i].track==0) && (toc_entries[i].minute==0) &&
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(toc_entries[i].second==0) && (toc_entries[i].frame==0)
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) {
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break;
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}
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if (toc_entries[i].track == CDROM_LEADOUT_CDAR) {
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cdrom->track[i].id = CDROM_LEADOUT;
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} else {
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cdrom->track[i].id = toc_entries[i].track;
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}
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if (disc_info.disctype == 0) {
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cdrom->track[i].type = SDL_AUDIO_TRACK;
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} else {
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cdrom->track[i].type = SDL_DATA_TRACK;
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}
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minute = SDL_SYS_CD_BcdToBinary(toc_entries[i].minute);
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second = SDL_SYS_CD_BcdToBinary(toc_entries[i].second);
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frame = SDL_SYS_CD_BcdToBinary(toc_entries[i].frame);
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cdrom->track[i].offset = MSF_TO_FRAMES(minute, second, frame);
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if ( i > 0 ) {
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cdrom->track[i-1].length = cdrom->track[i].offset - cdrom->track[i-1].offset;
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}
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++i;
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}
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free(toc_entries);
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return 0;
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}
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static int SDL_SYS_CDGetTOC(SDL_CD *cdrom)
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{
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int i,okay;
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struct cdrom_tochdr toc;
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struct cdrom_tocentry entry;
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/* CDAR compatible drive ? */
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if (metados_drives[cdrom->id].type == DRIVE_TYPE_CDAR) {
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return SDL_SYS_CDGetTOC_CDAR(cdrom);
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}
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/* Use standard ioctl() */
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if (SDL_SYS_CDioctl(cdrom->id, CDROMREADTOCHDR, &toc)<0) {
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return -1;
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}
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cdrom->numtracks = toc.cdth_trk1-toc.cdth_trk0+1;
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if ( cdrom->numtracks > SDL_MAX_TRACKS ) {
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cdrom->numtracks = SDL_MAX_TRACKS;
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}
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/* Read all the track TOC entries */
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okay=1;
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for ( i=0; i<=cdrom->numtracks; ++i ) {
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if ( i == cdrom->numtracks ) {
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cdrom->track[i].id = CDROM_LEADOUT;
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} else {
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cdrom->track[i].id = toc.cdth_trk0+i;
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}
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entry.cdte_track = cdrom->track[i].id;
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entry.cdte_format = CDROM_MSF;
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if ( SDL_SYS_CDioctl(cdrom->id, CDROMREADTOCENTRY, &entry) < 0 ) {
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okay=0;
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break;
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} else {
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if ( entry.cdte_ctrl & CDROM_DATA_TRACK ) {
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cdrom->track[i].type = SDL_DATA_TRACK;
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} else {
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cdrom->track[i].type = SDL_AUDIO_TRACK;
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}
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cdrom->track[i].offset = MSF_TO_FRAMES(
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entry.cdte_addr.msf.minute,
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entry.cdte_addr.msf.second,
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entry.cdte_addr.msf.frame);
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cdrom->track[i].length = 0;
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if ( i > 0 ) {
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cdrom->track[i-1].length = cdrom->track[i].offset-cdrom->track[i-1].offset;
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}
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}
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}
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return(okay ? 0 : -1);
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}
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/* Get CD-ROM status */
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static CDstatus SDL_SYS_CDStatus_CDAR(SDL_CD *cdrom, int *position)
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{
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return CD_ERROR;
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}
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static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position)
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{
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CDstatus status;
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struct cdrom_tochdr toc;
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struct cdrom_subchnl info;
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/* CDAR compatible drive ? */
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if (metados_drives[cdrom->id].type == DRIVE_TYPE_CDAR) {
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return SDL_SYS_CDStatus_CDAR(cdrom, position);
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}
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/* Standard ioctl */
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info.cdsc_format = CDROM_MSF;
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if ( SDL_SYS_CDioctl(cdrom->id, CDROMSUBCHNL, &info) < 0 ) {
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status = CD_TRAYEMPTY;
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} else {
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switch (info.cdsc_audiostatus) {
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case CDROM_AUDIO_INVALID:
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case CDROM_AUDIO_NO_STATUS:
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/* Try to determine if there's a CD available */
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if (SDL_SYS_CDioctl(cdrom->id, CDROMREADTOCHDR, &toc)==0) {
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status = CD_STOPPED;
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} else {
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status = CD_TRAYEMPTY;
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}
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break;
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case CDROM_AUDIO_COMPLETED:
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status = CD_STOPPED;
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break;
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case CDROM_AUDIO_PLAY:
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status = CD_PLAYING;
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break;
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case CDROM_AUDIO_PAUSED:
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/* Workaround buggy CD-ROM drive */
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if ( info.cdsc_trk == CDROM_LEADOUT ) {
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status = CD_STOPPED;
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} else {
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status = CD_PAUSED;
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}
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break;
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default:
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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_CDAR(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);
|
||
|
|
|
||
|
|
return Metasetsongtime(metados_drives[cdrom->id].device[0], 0,
|
||
|
|
(playtime.cdmsf_min0<<16)|(playtime.cdmsf_sec0<<8)|(playtime.cdmsf_frame0),
|
||
|
|
(playtime.cdmsf_min1<<16)|(playtime.cdmsf_sec1<<8)|(playtime.cdmsf_frame1)
|
||
|
|
);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length)
|
||
|
|
{
|
||
|
|
struct cdrom_msf playtime;
|
||
|
|
|
||
|
|
/* CDAR compatible drive ? */
|
||
|
|
if (metados_drives[cdrom->id].type == DRIVE_TYPE_CDAR) {
|
||
|
|
return SDL_SYS_CDPlay_CDAR(cdrom, start, length);
|
||
|
|
}
|
||
|
|
|
||
|
|
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)
|
||
|
|
{
|
||
|
|
/* CDAR compatible drive ? */
|
||
|
|
if (metados_drives[cdrom->id].type == DRIVE_TYPE_CDAR) {
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
return(SDL_SYS_CDioctl(cdrom->id, CDROMPAUSE, 0));
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Resume play */
|
||
|
|
static int SDL_SYS_CDResume(SDL_CD *cdrom)
|
||
|
|
{
|
||
|
|
/* CDAR compatible drive ? */
|
||
|
|
if (metados_drives[cdrom->id].type == DRIVE_TYPE_CDAR) {
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
return(SDL_SYS_CDioctl(cdrom->id, CDROMRESUME, 0));
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Stop play */
|
||
|
|
static int SDL_SYS_CDStop(SDL_CD *cdrom)
|
||
|
|
{
|
||
|
|
/* CDAR compatible drive ? */
|
||
|
|
if (metados_drives[cdrom->id].type == DRIVE_TYPE_CDAR) {
|
||
|
|
return Metastopaudio(metados_drives[cdrom->id].device[0]);
|
||
|
|
}
|
||
|
|
|
||
|
|
return(SDL_SYS_CDioctl(cdrom->id, CDROMSTOP, 0));
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Eject the CD-ROM */
|
||
|
|
static int SDL_SYS_CDEject(SDL_CD *cdrom)
|
||
|
|
{
|
||
|
|
/* CDAR compatible drive ? */
|
||
|
|
if (metados_drives[cdrom->id].type == DRIVE_TYPE_CDAR) {
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
return(SDL_SYS_CDioctl(cdrom->id, CDROMEJECT, 0));
|
||
|
|
}
|