dockapps/ascd/libworkman/plat_openbsd.c

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/*
* $Id: plat_openbsd.c,v 1.7 1999/03/07 08:36:40 dirk Exp $
*
* This file is part of WorkMan, the civilized CD player library
* (c) 1991-1997 by Steven Grimm (original author)
* (c) by Dirk F<EFBFBD>rsterling (current 'author' = maintainer)
* The maintainer can be contacted by his e-mail address:
* milliByte@DeathsDoor.com
*
* 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
*
*
* OpenBSD-specific drive control routines. (Based on plat_freebsd.c)
*
* Michael Shalayeff, 7/24/96
* Todd Pfaff, 3/20/94
*
*/
#if defined(__OpenBSD__)
static char plat_openbsd[] = "$Id: plat_openbsd.c,v 1.7 1999/03/07 08:36:40 dirk Exp $";
#include <errno.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/param.h>
#include <sys/mount.h>
#include <fcntl.h>
#include <sys/param.h>
#include <sys/stat.h>
#include "include/wm_config.h"
/* this is for glibc 2.x which defines the ust structure in ustat.h not stat.h */
#ifdef __GLIBC__
#include <sys/ustat.h>
#endif
#include <sys/time.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/cdio.h>
#include <sys/scsiio.h>
#include <scsi/scsi_all.h>
#include <scsi/scsi_cd.h>
#include "include/wm_struct.h"
#define WM_MSG_CLASS WM_MSG_CLASS_PLATFORM
void *malloc();
int min_volume = 10;
int max_volume = 255;
extern char *cd_device;
/*
* Initialize the drive. A no-op for the generic driver.
*/
int
gen_init(struct wm_drive *d)
{
return (0);
}
/*
* Get the number of tracks on the CD.
*/
int
gen_get_trackcount(struct wm_drive *d, int tracks)
{
struct ioc_toc_header hdr;
if (ioctl(d->fd, CDIOREADTOCHEADER, &hdr) == -1)
return (-1);
*tracks = hdr.ending_track - hdr.starting_track + 1;
return (0);
}
/*
* Get the start time and mode (data or audio) of a track.
*
* XXX - this should get cached, but that means keeping track of ejects.
*/
int
gen_get_trackinfo(struct wm_drive *d, int track, int *data, int *startframe)
{
struct ioc_read_toc_entry toc;
struct cd_toc_entry toc_buffer;
bzero((char *)&toc_buffer, sizeof(toc_buffer));
toc.address_format = CD_MSF_FORMAT;
toc.starting_track = track;
toc.data_len = sizeof(toc_buffer);
toc.data = &toc_buffer;
if (ioctl(d->fd, CDIOREADTOCENTRYS, &toc))
return (-1);
*data = ((toc_buffer.control & 0x4) != 0);
*startframe = toc_buffer.addr.msf.minute*60*75 +
toc_buffer.addr.msf.second * 75 +
toc_buffer.addr.msf.frame;
return (0);
}
/*
* Get the number of frames on the CD.
*/
int
gen_get_cdlen(struct wm_drive *d, int *frames)
{
int tmp;
struct ioc_toc_header hdr;
int status;
#define LEADOUT 0xaa /* see scsi.c. what a hack! */
return gen_get_trackinfo(d, LEADOUT, &tmp, frames);
}
/*
* Get the current status of the drive: the current play mode, the absolute
* position from start of disc (in frames), and the current track and index
* numbers if the CD is playing or paused.
*/
int
gen_get_drive_status(struct wm_drive *d, enum wm_cd_modes oldmode,
enum wm_cd_modes *mode, int *pos, int *track, int *index)
{
struct ioc_read_subchannel sc;
struct cd_sub_channel_info scd;
/* If we can't get status, the CD is ejected, so default to that. */
*mode = WM_CDM_EJECTED;
sc.address_format = CD_MSF_FORMAT;
sc.data_format = CD_CURRENT_POSITION;
sc.track = 0;
sc.data_len = sizeof(scd);
sc.data = (struct cd_sub_channel_info *)&scd;
/* Is the device open? */
if (d->fd < 0)
{
switch (wmcd_open(d)) {
case -1: /* error */
return (-1);
case 1: /* retry */
return (0);
}
}
if (ioctl(d->fd, CDIOCREADSUBCHANNEL, &sc)) {
/* we need to release the device so the kernel will notice
reloaded media */
(void) close(d->fd);
d->fd = -1;
return (0); /* ejected */
}
switch (scd.header.audio_status) {
case CD_AS_PLAY_IN_PROGRESS:
*mode = WM_CDM_PLAYING;
dopos:
*pos = scd.what.position.absaddr.msf.minute * 60 * 75 +
scd.what.position.absaddr.msf.second * 75 +
scd.what.position.absaddr.msf.frame;
*track = scd.what.position.track_number;
*index = scd.what.position.index_number;
break;
case CD_AS_PLAY_PAUSED:
if (oldmode == WM_CDM_PLAYING || oldmode == WM_CDM_PAUSED)
{
*mode = WM_CDM_PAUSED;
goto dopos;
}
else
*mode = WM_CDM_STOPPED;
break;
case CD_AS_PLAY_COMPLETED:
*mode = WM_CDM_TRACK_DONE; /* waiting for next track. */
break;
case CD_AS_NO_STATUS:
case 0:
*mode = WM_CDM_STOPPED;
break;
}
return (0);
}
/*
* scale_volume(vol, max)
*
* Return a volume value suitable for passing to the CD-ROM drive. "vol"
* is a volume slider setting; "max" is the slider's maximum value.
*
* On Sun and DEC CD-ROM drives, the amount of sound coming out the jack
* increases much faster toward the top end of the volume scale than it
* does at the bottom. To make up for this, we make the volume scale look
* sort of logarithmic (actually an upside-down inverse square curve) so
* that the volume value passed to the drive changes less and less as you
* approach the maximum slider setting. The actual formula looks like
*
* (max^2 - (max - vol)^2) * (max_volume - min_volume)
* v = --------------------------------------------------- + min_volume
* max^2
*
* If your system's volume settings aren't broken in this way, something
* like the following should work:
*
* return ((vol * (max_volume - min_volume)) / max + min_volume);
*/
static int
scale_volume(int vol, int max)
{
return ((vol * (max_volume - min_volume)) / max + min_volume);
}
/*
* Set the volume level for the left and right channels. Their values
* range from 0 to 100.
*/
int
gen_set_volume(struct wm_drive *d, int left, int right)
{
struct ioc_vol vol;
if (left < 0) /* don't laugh, I saw this happen once! */
left = 0;
if (right < 0)
right = 0;
left = scale_volume(left, 100);
right = scale_volume(right, 100);
bzero((char *)&vol, sizeof(vol));
vol.vol[LEFT_PORT] = left;
vol.vol[RIGHT_PORT] = right;
if (ioctl(d->fd, CDIOCSETVOL, &vol))
return (-1);
return (0);
}
/*
* Pause the CD.
*/
int
gen_pause(struct wm_drive *d)
{
return (ioctl(d->fd, CDIOCPAUSE));
}
/*
* Resume playing the CD (assuming it was paused.)
*/
int
gen_resume(struct wm_drive *d)
{
return (ioctl(d->fd, CDIOCRESUME));
}
/*
* Stop the CD.
*/
int
gen_stop(struct wm_drive *d)
{
return (ioctl(d->fd, CDIOCSTOP));
}
/*
* Play the CD from one position to another (both in frames.)
*/
int
gen_play(struct wm_drive *d, int start, int end)
{
struct ioc_play_msf msf;
msf.start_m = start / (60*75);
msf.start_s = (start % (60*75)) / 75;
msf.start_f = start % 75;
msf.end_m = end / (60*75);
msf.end_s = (end % (60*75)) / 75;
msf.end_f = end % 75;
if (ioctl(d->fd, CDIOCSTART))
return (-1);
if (ioctl(d->fd, CDIOCPLAYMSF, &msf))
return (-2);
return (0);
}
/*
* Eject the current CD, if there is one.
*/
int
gen_eject(struct wm_drive *d)
{
/* On some systems, we can check to see if the CD is mounted. */
struct stat stbuf;
struct statfs buf;
int rval;
if (fstat(d->fd, &stbuf) != 0)
return (-2);
/* Is this a mounted filesystem? */
if (fstatfs(stbuf.st_rdev, &buf) == 0)
return (-3);
rval = ioctl(d->fd, CDIOCALLOW);
if (rval == 0)
rval = ioctl(d->fd, CDIOCEJECT);
if (rval == 0)
rval = ioctl(d->fd, CDIOCPREVENT);
if (rval == 0)
rval = close(d->fd);
if (rval == 0)
d->fd = -1;
return rval;
} /* gen_eject() */
/*----------------------------------------*
* Close the CD tray
*
* Please edit and send changes to
* milliByte@DeathsDoor.com
*----------------------------------------*/
int gen_closetray(struct wm_drive *d)
{
#ifdef CAN_CLOSE
if(!close(d->fd))
{
d->fd=-1;
return(wmcd_reopen(d));
} else {
return(-1);
}
#else
/* Always succeed if the drive can't close */
return(0);
#endif /* CAN_CLOSE */
} /* gen_closetray() */
/*
* unscale_volume(cd_vol, max)
*
* Given a value between min_volume and max_volume, return the volume slider
* value needed to achieve that value.
*
* Rather than perform floating-point calculations to reverse the above
* formula, we simply do a binary search of scale_volume()'s return values.
*/
static int
unscale_volume(int cd_vol, int max)
{
int vol = 0, top = max, bot = 0, scaled;
while (bot <= top)
{
vol = (top + bot) / 2;
scaled = scale_volume(vol, max);
if (cd_vol == scaled)
break;
if (cd_vol < scaled)
top = vol - 1;
else
bot = vol + 1;
}
if (vol < 0)
vol = 0;
else if (vol > max)
vol = max;
return (vol);
}
/*
* Read the initial volume from the drive, if available. Each channel
* ranges from 0 to 100, with -1 indicating data not available.
*/
int
gen_get_volume(struct wm_drive *d, int *left, int *right)
{
struct ioc_vol vol;
if (d->fd >= 0)
{
bzero((char *)&vol, sizeof(vol));
if (ioctl(d->fd, CDIOCGETVOL, &vol))
*left = *right = -1;
else
{
*left = unscale_volume(vol.vol[LEFT_PORT], 100);
*right = unscale_volume(vol.vol[RIGHT_PORT], 100);
}
}
else
*left = *right = -1;
return (0);
}
/*
* Send an arbitrary SCSI command to a device.
*
*/
int
wm_scsi(struct wm_drive *d, unsigned char *cdb,
int cdblen, void *retbuf, int retbuflen, int getreply)
{
return (-1);
}
/*
* Open the CD device and figure out what kind of drive is attached.
*/
int
wmcd_open(struct wm_drive *d)
{
int fd;
static int warned = 0;
char vendor[32] = WM_STR_GENVENDOR;
char model[32] = WM_STR_GENMODEL;
char rev[32] = WM_STR_GENREV;
if (d->fd >= 0) /* Device already open? */
return (0);
if (cd_device == NULL)
cd_device = DEFAULT_CD_DEVICE;
d->fd = open(cd_device, 0);
if (d->fd < 0)
{
if (errno == EACCES)
{
if (!warned)
{
fprintf(stderr,
"As root, please run\n\nchmod 666 %s\n\n%s\n", cd_device,
"to give yourself permission to access the CD-ROM device.");
warned++;
}
}
/* No CD in drive. */
return (1);
}
if (warned)
{
warned = 0;
fprintf(stderr, "Thank you.\n");
}
/* Now fill in the relevant parts of the wm_drive structure. */
fd = d->fd;
*d = *(find_drive_struct(vendor, model, rev));
wm_drive_settype(vendor, model, rev);
(d->init)(d);
d->fd = fd;
return (0);
} /* wmcd_open() */
/*
* Re-Open the device if it is open.
*/
int
wmcd_reopen( struct wm_drive *d )
{
int status;
do {
wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "wmcd_reopen ");
if (d->fd >= 0) /* Device really open? */
{
wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "closes the device and ");
status = close( d->fd ); /* close it! */
/* we know, that the file is closed, do we? */
d->fd = -1;
}
wm_susleep( 1000 );
wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "calls wmcd_open()\n");
status = wmcd_open( d ); /* open it as usual */
wm_susleep( 1000 );
} while ( status != 0 );
return status;
} /* wmcd_reopen() */
#endif