src/cdrom/osf/SDL_syscdrom.c
changeset 654 e92bcf2573cb
child 873 89666943c598
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/cdrom/osf/SDL_syscdrom.c	Tue Jul 22 14:01:21 2003 +0000
@@ -0,0 +1,453 @@
+/*
+    Tru64 audio module for SDL (Simple DirectMedia Layer)
+    Copyright (C) 2003
+
+    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
+
+
+*/
+
+
+/* Functions for system-level CD-ROM audio control */
+
+//#define DEBUG_CDROM 1
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <io/cam/cdrom.h>
+#include <io/cam/rzdisk.h>
+#include <io/common/devgetinfo.h>
+#include <alloca.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.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
+
+/* 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))
+
+/* Check a drive to see if it is a CD-ROM */
+/* Caution!! Not tested. */ 
+static int CheckDrive(char *drive, struct stat *stbuf)
+{
+    int is_cd, cdfd;
+    struct cd_sub_channel 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_RDWR|O_NDELAY), 0);
+	if ( cdfd >= 0 ) {
+	    info.sch_address_format = CDROM_MSF_FORMAT;
+	    info.sch_data_format = CDROM_CURRENT_POSITION;
+	    info.sch_alloc_length = 0;
+	    info.sch_track_number = 0;
+	    info.sch_buffer = 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, CDROM_READ_SUBCHANNEL, &info) == 0) ||
+		    ERRNO_TRAYEMPTY(errno) ) {
+		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] ) {
+#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] = (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;
+#ifdef DEBUG_CDROM
+  fprintf(stderr, "Added CD-ROM drive: %s\n", drive);
+#endif
+    }
+}
+
+int  SDL_SYS_CDInit(void)
+{
+    /* checklist: /dev/cdrom,/dev/cd?c /dev/acd?c
+     * /dev/matcd?c /dev/mcd?c /dev/scd?c
+     *
+     */
+    static char *checklist[] = {
+	"?0 rdisk/cdrom?",NULL};
+    char drive[32];
+    char *SDLcdrom;
+    int i, j, exists;
+    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 = 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/%sc", &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);
+	    }
+	}
+    }
+/*
+    SDLcdrom=malloc(sizeof(char) * 32);
+    strcpy(SDLcdrom,"/dev/rdisk/cdrom0c");
+    SDL_cdlist[0] = SDLcdrom;
+    stat(SDLcdrom, &stbuf);
+    SDL_cdmode[0] = stbuf.st_rdev;
+    SDL_numcds = 1;
+ */
+    return (0);
+}
+
+static const char *SDL_SYS_CDName(int drive)
+{
+    return(SDL_cdlist[drive]);
+}
+
+static int SDL_SYS_CDOpen(int drive)
+{
+    /* O_RDWR: To use ioctl(fd, SCSI_STOP_UNIT) */
+    return(open(SDL_cdlist[drive], (O_RDWR|O_NDELAY), 0));
+}
+
+static int SDL_SYS_CDGetTOC(SDL_CD *cdrom)
+{
+    struct cd_toc                  toc;
+    struct cd_toc_header           hdr;
+    struct cd_toc_entry          *cdte;
+    int i;
+    int okay = 0;
+    if ( ioctl(cdrom->id, CDROM_TOC_HEADER, &hdr) ) {
+	fprintf(stderr,"ioctl error CDROM_TOC_HEADER\n");
+	return -1;
+    }
+    cdrom->numtracks = hdr.th_ending_track - hdr.th_starting_track + 1;
+    if ( cdrom->numtracks > SDL_MAX_TRACKS ) {
+	cdrom->numtracks = SDL_MAX_TRACKS;
+    }
+#ifdef DEBUG_CDROM
+  fprintf(stderr,"hdr.th_data_len1 = %d\n", hdr.th_data_len1);
+  fprintf(stderr,"hdr.th_data_len0 = %d\n", hdr.th_data_len0);
+  fprintf(stderr,"hdr.th_starting_track = %d\n", hdr.th_starting_track);
+  fprintf(stderr,"hdr.th_ending_track = %d\n", hdr.th_ending_track);
+  fprintf(stderr,"cdrom->numtracks = %d\n", cdrom->numtracks);
+#endif
+    toc.toc_address_format = CDROM_LBA_FORMAT;
+    toc.toc_starting_track = 0;
+    toc.toc_alloc_length = (hdr.th_data_len1 << 8) +
+			    hdr.th_data_len0 + sizeof(hdr);
+    if ( (toc.toc_buffer = alloca(toc.toc_alloc_length)) == NULL) {
+	fprintf(stderr,"cannot allocate toc.toc_buffer\n");
+	return -1;
+    }
+
+    bzero (toc.toc_buffer, toc.toc_alloc_length);
+    if (ioctl(cdrom->id, CDROM_TOC_ENTRYS, &toc)) {
+	fprintf(stderr,"ioctl error CDROM_TOC_ENTRYS\n");
+	return -1;
+    }
+
+    (char *)cdte = toc.toc_buffer + sizeof(hdr);
+	for (i=0; i <= cdrom->numtracks; ++i) {
+	    if (i == cdrom->numtracks ) {
+		cdrom->track[i].id = 0xAA;;
+	    } else {
+		cdrom->track[i].id = hdr.th_starting_track + i;
+	    }
+
+	    cdrom->track[i].type =
+		cdte[i].te_control & CDROM_DATA_TRACK;
+	    cdrom->track[i].offset =
+		cdte[i].te_absaddr.lba.addr3 << 24 |
+		cdte[i].te_absaddr.lba.addr2 << 16 |
+		cdte[i].te_absaddr.lba.addr1 << 8  |
+		cdte[i].te_absaddr.lba.addr0;
+	    cdrom->track[i].length = 0;
+	    if ( i > 0 ) {
+		cdrom->track[i - 1].length =
+		    cdrom->track[i].offset -
+		    cdrom->track[i - 1].offset;
+	    }
+	}
+#ifdef DEBUG_CDROM
+  for (i = 0; i <= cdrom->numtracks; i++) {
+    fprintf(stderr,"toc_entry[%d].te_track_number = %d\n",
+	    i,cdte[i].te_track_number);
+    fprintf(stderr,"cdrom->track[%d].id = %d\n", i,cdrom->track[i].id);
+    fprintf(stderr,"cdrom->track[%d].type = %x\n", i,cdrom->track[i].type);
+    fprintf(stderr,"cdrom->track[%d].offset = %d\n", i,cdrom->track[i].offset);
+    fprintf(stderr,"cdrom->track[%d].length = %d\n", i,cdrom->track[i].length);
+  }
+#endif
+    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 cd_sub_channel            sc;
+    struct cd_subc_channel_data     scd;
+
+    sc.sch_address_format = CDROM_LBA_FORMAT;
+    sc.sch_data_format    = CDROM_CURRENT_POSITION;
+    sc.sch_track_number   = 0;
+    sc.sch_alloc_length   = sizeof(scd);
+    sc.sch_buffer         = (caddr_t)&scd;
+    if ( ioctl(cdrom->id, CDROM_READ_SUBCHANNEL, &sc) ) {
+	status = CD_ERROR;
+	fprintf(stderr,"ioctl error CDROM_READ_SUBCHANNEL \n");
+    } else {
+	switch (scd.scd_header.sh_audio_status) {
+	    case AS_AUDIO_INVALID:
+		status = CD_STOPPED;
+		break;
+	    case AS_PLAY_IN_PROGRESS:
+		status = CD_PLAYING;
+		break;
+	    case AS_PLAY_PAUSED:
+		status = CD_PAUSED;
+		break;
+	    case AS_PLAY_COMPLETED:
+		status = CD_STOPPED;
+		break;
+	    case AS_PLAY_ERROR:
+		status = CD_ERROR;
+		break;
+	    case AS_NO_STATUS:
+		status = CD_STOPPED;
+		break;
+	    default:
+		status = CD_ERROR;
+		break;
+	}
+#ifdef DEBUG_CDROM
+  fprintf(stderr,"scd.scd_header.sh_audio_status = %x\n",
+	scd.scd_header.sh_audio_status);
+#endif
+    }
+    if (position) {
+	if (status == CD_PLAYING || (status == CD_PAUSED) ) {
+	    *position =
+		scd.scd_position_data.scp_absaddr.lba.addr3 << 24 |
+		scd.scd_position_data.scp_absaddr.lba.addr2 << 16 |
+		scd.scd_position_data.scp_absaddr.lba.addr1 << 8  |
+		scd.scd_position_data.scp_absaddr.lba.addr0;
+	} else {
+	    *position = 0;
+	}
+    }
+
+    return status;
+}
+
+/* Start play */
+static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length)
+{
+/* Play MSF
+ *
+ */
+    struct cd_play_audio_msf msf;
+    int end;
+
+    bzero(&msf, sizeof(msf));
+    end = start +length;
+    FRAMES_TO_MSF(start,
+		  &msf.msf_starting_M_unit,
+		  &msf.msf_starting_S_unit,
+		  &msf.msf_starting_F_unit);
+    FRAMES_TO_MSF(end,
+		  &msf.msf_ending_M_unit,
+		  &msf.msf_ending_S_unit,
+		  &msf.msf_ending_F_unit);
+
+    return(ioctl(cdrom->id, CDROM_PLAY_AUDIO_MSF, &msf));
+}
+
+/* Pause play */
+static int SDL_SYS_CDPause(SDL_CD *cdrom)
+{
+    return(ioctl(cdrom->id, CDROM_PAUSE_PLAY));
+}
+
+/* Resume play */
+static int SDL_SYS_CDResume(SDL_CD *cdrom)
+{
+    return(ioctl(cdrom->id, CDROM_RESUME_PLAY));
+}
+
+/* Stop play */
+static int SDL_SYS_CDStop(SDL_CD *cdrom)
+{
+    return(ioctl(cdrom->id, SCSI_STOP_UNIT));
+}
+
+/* Eject the CD-ROM */
+static int SDL_SYS_CDEject(SDL_CD *cdrom)
+{
+    return(ioctl(cdrom->id, CDROM_EJECT_CADDY));
+}
+
+/* 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 ) {
+	    free(SDL_cdlist[i]);
+	}
+	SDL_numcds = 0;
+    }
+}
+
+