/*

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 <dirent.h>

#include <sys/stat.h>

#include <fcntl.h>

#include <io/cam/cdrom.h>

#include <io/cam/rzdisk.h>

#include <io/common/devgetinfo.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);

/* Check a drive to see if it is a CD-ROM */

/* Caution!! Not tested. */

static int CheckDrive(char *drive, struct stat *stbuf)

{

int cdfd, is_cd = 0;

struct mode_sel_sns_params msp;

struct inquiry_info inq;

#ifdef DEBUG_CDROM

char *devtype[] = {"Disk", "Tape", "Printer", "Processor", "WORM",

"CD-ROM", "Scanner", "Optical", "Changer", "Comm", "Unknown"};

#endif

bzero(&msp, sizeof(msp));

bzero(&inq, sizeof(inq));

/* If it doesn't exist, return -1 */

if ( stat(drive, stbuf) < 0 ) {

return(-1);

}

if ( (cdfd = open(drive, (O_RDWR|O_NDELAY), 0)) >= 0 ) {

msp.msp_addr = (caddr_t) &inq;

msp.msp_pgcode = 0;

msp.msp_pgctrl = 0;

msp.msp_length = sizeof(inq);

msp.msp_setps = 0;

if ( ioctl(cdfd, SCSI_GET_INQUIRY_DATA, &msp) )

return (0);

#ifdef DEBUG_CDROM

fprintf(stderr, "Device Type: %s\n", devtype[inq.perfdt]);

fprintf(stderr, "Vendor: %.8s\n", inq.vndrid);

fprintf(stderr, "Product: %.8s\n", inq.prodid);

fprintf(stderr, "Revision: %.8s\n", inq.revlvl);

#endif

if ( inq.perfdt == DTYPE_RODIRECT )

is_cd = 1;

}

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 *)SDL_malloc(SDL_strlen(drive)+1);

if ( SDL_cdlist[i] == NULL ) {

SDL_OutOfMemory();

return;

}

SDL_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:

*

* Tru64 5.X (/dev/rdisk/cdrom?c)

* dir: /dev/rdisk, name: cdrom

*

* Digital UNIX 4.0X (/dev/rrz?c)

* dir: /dev, name: rrz

*

*/

struct {

char *dir;

char *name;

} checklist[] = {

{"/dev/rdisk", "cdrom"},

{"/dev", "rrz"},

{NULL, 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 = SDL_getenv("SDL_CDROM"); /* ':' separated list of devices */

if ( SDLcdrom != NULL ) {

char *cdpath, *delim;

cdpath = SDL_malloc(SDL_strlen(SDLcdrom)+1);

if ( cdpath != NULL ) {

SDL_strcpy(cdpath, SDLcdrom);

SDLcdrom = cdpath;

do {

delim = SDL_strchr(SDLcdrom, ':');

if ( delim ) {

*delim++ = '\0';

}

if ( CheckDrive(SDLcdrom, &stbuf) > 0 ) {

AddDrive(SDLcdrom, &stbuf);

}

if ( delim ) {

SDLcdrom = delim;

} else {

SDLcdrom = NULL;

}

} while ( SDLcdrom );

SDL_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].dir; ++i) {

DIR *devdir;

struct dirent *devent;

int name_len;

devdir = opendir(checklist[i].dir);

if (devdir) {

name_len = SDL_strlen(checklist[i].name);

while (devent = readdir(devdir))

if (SDL_memcmp(checklist[i].name, devent->d_name, name_len) == 0)

if (devent->d_name[devent->d_namlen-1] == 'c') {

SDL_snprintf(drive, SDL_arraysize(drive), "%s/%s", checklist[i].dir, devent->d_name);

#ifdef DEBUG_CDROM

fprintf(stderr, "Try to add drive: %s\n", drive);

#endif

if ( CheckDrive(drive, &stbuf) > 0 )

AddDrive(drive, &stbuf);

}

closedir(devdir);

} else {

#ifdef DEBUG_CDROM

fprintf(stderr, "cannot open dir: %s\n", checklist[i].dir);

#endif

}

}

/*

SDLcdrom=SDL_malloc(sizeof(char) * 32);

SDL_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;

}

cdte =(struct cd_toc_entry *) ((char *) 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 + 150, /* LBA = 4500*M + 75*S + F - 150 */

&msf.msf_starting_M_unit,

&msf.msf_starting_S_unit,

&msf.msf_starting_F_unit);

FRAMES_TO_MSF(end + 150, /* LBA = 4500*M + 75*S + F - 150 */

&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 ) {

SDL_free(SDL_cdlist[i]);

}

SDL_numcds = 0;

}

}