/*

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;

}

}