SDL_syscdrom.c
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/*
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 */
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/* #define DEBUG_CDROM 1 */
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#include <sys/types.h>
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#include <dirent.h>
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#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"
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#include "../SDL_syscdrom.h"
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/* 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)
{
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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));
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/* If it doesn't exist, return -1 */
if ( stat(drive, stbuf) < 0 ) {
return(-1);
}
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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;
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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;
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}
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.
*
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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;
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SDL_cdlist[i] = (char *)SDL_malloc(SDL_strlen(drive)+1);
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if ( SDL_cdlist[i] == NULL ) {
SDL_OutOfMemory();
return;
}
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SDL_strcpy(SDL_cdlist[i], drive);
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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)
{
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/* checklist:
*
* Tru64 5.X (/dev/rdisk/cdrom?c)
* dir: /dev/rdisk, name: cdrom
*
* Digital UNIX 4.0X (/dev/rrz?c)
* dir: /dev, name: rrz
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struct {
char *dir;
char *name;
} checklist[] = {
{"/dev/rdisk", "cdrom"},
{"/dev", "rrz"},
{NULL, NULL}};
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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 */
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SDLcdrom = SDL_getenv("SDL_CDROM"); /* ':' separated list of devices */
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if ( SDLcdrom != NULL ) {
char *cdpath, *delim;
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cdpath = SDL_malloc(SDL_strlen(SDLcdrom)+1);
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if ( cdpath != NULL ) {
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SDL_strcpy(cdpath, SDLcdrom);
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SDLcdrom = cdpath;
do {
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delim = SDL_strchr(SDLcdrom, ':');
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if ( delim ) {
*delim++ = '\0';
}
if ( CheckDrive(SDLcdrom, &stbuf) > 0 ) {
AddDrive(SDLcdrom, &stbuf);
}
if ( delim ) {
SDLcdrom = delim;
} else {
SDLcdrom = NULL;
}
} while ( SDLcdrom );
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SDL_free(cdpath);
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}
/* If we found our drives, there's nothing left to do */
if ( SDL_numcds > 0 ) {
return(0);
}
}
/* Scan the system for CD-ROM drives */
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for ( i = 0; checklist[i].dir; ++i) {
DIR *devdir;
struct dirent *devent;
int name_len;
devdir = opendir(checklist[i].dir);
if (devdir) {
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name_len = SDL_strlen(checklist[i].name);
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while (devent = readdir(devdir))
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if (SDL_memcmp(checklist[i].name, devent->d_name, name_len) == 0)
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if (devent->d_name[devent->d_namlen-1] == 'c') {
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SDL_snprintf(drive, SDL_arraysize(drive), "%s/%s", checklist[i].dir, devent->d_name);
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#ifdef DEBUG_CDROM
fprintf(stderr, "Try to add drive: %s\n", drive);
#endif
if ( CheckDrive(drive, &stbuf) > 0 )
AddDrive(drive, &stbuf);
}
closedir(devdir);
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#ifdef DEBUG_CDROM
fprintf(stderr, "cannot open dir: %s\n", checklist[i].dir);
#endif
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SDLcdrom=SDL_malloc(sizeof(char) * 32);
SDL_strcpy(SDLcdrom,"/dev/rdisk/cdrom0c");
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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;
}
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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;
}
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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;
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#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)
{
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/*
* Play MSF
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*/
struct cd_play_audio_msf msf;
int end;
bzero(&msf, sizeof(msf));
end = start +length;
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FRAMES_TO_MSF(start + 150, /* LBA = 4500*M + 75*S + F - 150 */
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&msf.msf_starting_M_unit,
&msf.msf_starting_S_unit,
&msf.msf_starting_F_unit);
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FRAMES_TO_MSF(end + 150, /* LBA = 4500*M + 75*S + F - 150 */
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&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 ) {
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SDL_free(SDL_cdlist[i]);
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}
SDL_numcds = 0;
}
}