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546 lines
12 KiB
546 lines
12 KiB
/*
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* $Id$
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*
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* This file is part of WorkMan, the civilized CD player library
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* (c) 1991-1997 by Steven Grimm (original author)
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* (c) by Dirk Försterling (current 'author' = maintainer)
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* The maintainer can be contacted by his e-mail address:
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* milliByte@DeathsDoor.com
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the Free
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*
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* OpenBSD-specific drive control routines. (Based on plat_freebsd.c)
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*
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* Michael Shalayeff, 7/24/96
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* Todd Pfaff, 3/20/94
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*
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*/
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#if defined(__OpenBSD__) || defined(__OpenBSD)
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#include <errno.h>
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#include <stdio.h>
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/mount.h>
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#include <fcntl.h>
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#include <sys/param.h>
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#include <sys/stat.h>
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#include "include/wm_config.h"
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#include "include/wm_cdrom.h"
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#include "include/wm_helpers.h"
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/* this is for glibc 2.x which defines the ust structure in ustat.h not stat.h */
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#ifdef __GLIBC__
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#include <sys/ustat.h>
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#endif
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#include <sys/time.h>
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#include <string.h>
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#include <sys/ioctl.h>
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#include <sys/cdio.h>
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#include <sys/scsiio.h>
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#include <scsi/scsi_all.h>
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#include <scsi/cd.h>
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#include <scsi/scsi_cd.h>
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#include "include/wm_struct.h"
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#include "include/wm_cdtext.h"
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#define WM_MSG_CLASS WM_MSG_CLASS_PLATFORM
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void *malloc();
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int min_volume = 10;
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int max_volume = 255;
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/*
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* Initialize the drive. A no-op for the generic driver.
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*/
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int
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gen_init(struct wm_drive *d)
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{
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return (0);
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} /* gen_init() */
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char *cds[] = {"/dev/rcd0c", "/dev/rcd1c", "/dev/acd0c", NULL};
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/*
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* Open the CD device and figure out what kind of drive is attached.
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*/
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int
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wmcd_open(struct wm_drive *d)
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{
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int fd;
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static int warned = 0;
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char vendor[32] = WM_STR_GENVENDOR;
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char model[32] = WM_STR_GENMODEL;
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char rev[32] = WM_STR_GENREV;
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int i;
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if (d->fd >= 0) /* Device already open? */
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{
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wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "wmcd_open(): [device is open (fd=%d)]\n", d->fd);
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return (0);
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}
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if (d->cd_device == NULL)
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{
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for (i = 0; cds[i] != NULL; i++)
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{
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d->cd_device = cds[i];
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d->fd = open(d->cd_device, O_RDONLY);
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if (d->fd >= 0)
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break;
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}
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}
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else
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d->fd = open(d->cd_device, O_RDONLY);
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if (d->fd < 0)
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{
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if (errno == EIO)
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/* No CD in drive. */
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return 1;
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else
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return -errno;
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}
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/* Now fill in the relevant parts of the wm_drive structure. */
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fd = d->fd;
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find_drive_struct(vendor, model, rev);
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(d->init)(d);
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d->fd = fd;
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return (0);
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} /* wmcd_open() */
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/*
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* Re-Open the device if it is open.
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*/
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int
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wmcd_reopen( struct wm_drive *d )
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{
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int status;
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do {
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wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "wmcd_reopen\n");
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status = gen_close( d );
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wm_susleep( 1000 );
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wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "calling wmcd_open()\n");
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status = wmcd_open( d ); /* open it as usual */
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wm_susleep( 1000 );
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} while ( status != 0 );
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return status;
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} /* wmcd_reopen() */
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/*
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* Send an arbitrary SCSI command to a device.
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*
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*/
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int
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wm_scsi(struct wm_drive *d, unsigned char *cdb,
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int cdblen, void *retbuf, int retbuflen, int getreply)
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{
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return (-1);
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} /* wm_scsi() */
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int
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gen_close( struct wm_drive *d )
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{
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if(d->fd != -1) {
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wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "closing the device\n");
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close(d->fd);
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}
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d->fd = -1;
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return 0;
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}
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/*
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* Get the current status of the drive: the current play mode, the absolute
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* position from start of disc (in frames), and the current track and index
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* numbers if the CD is playing or paused.
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*/
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int
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gen_get_drive_status(struct wm_drive *d, int oldmode,
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int *mode, int *pos, int *track, int *index)
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{
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struct ioc_read_subchannel sc;
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struct cd_sub_channel_info scd;
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/* If we can't get status, the CD is ejected, so default to that. */
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*mode = WM_CDM_EJECTED;
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sc.address_format = CD_MSF_FORMAT;
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sc.data_format = CD_CURRENT_POSITION;
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sc.track = 0;
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sc.data_len = sizeof(scd);
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sc.data = (struct cd_sub_channel_info *)&scd;
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/* Is the device open? */
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if (d->fd < 0)
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{
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switch (wmcd_open(d)) {
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case -1: /* error */
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return (-1);
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case 1: /* retry */
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return (0);
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}
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}
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if (ioctl(d->fd, CDIOCREADSUBCHANNEL, &sc))
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{
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/* we need to release the device so the kernel will notice
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reloaded media */
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(void) close(d->fd);
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d->fd = -1;
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return (0); /* ejected */
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}
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switch (scd.header.audio_status)
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{
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case CD_AS_PLAY_IN_PROGRESS:
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*mode = WM_CDM_PLAYING;
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dopos:
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*pos = scd.what.position.absaddr.msf.minute * 60 * 75 +
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scd.what.position.absaddr.msf.second * 75 +
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scd.what.position.absaddr.msf.frame;
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*track = scd.what.position.track_number;
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*index = scd.what.position.index_number;
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break;
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case CD_AS_PLAY_PAUSED:
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if (oldmode == WM_CDM_PLAYING || oldmode == WM_CDM_PAUSED)
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{
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*mode = WM_CDM_PAUSED;
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goto dopos;
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}
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else
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*mode = WM_CDM_STOPPED;
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break;
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case CD_AS_PLAY_COMPLETED:
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*mode = WM_CDM_TRACK_DONE; /* waiting for next track. */
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break;
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case CD_AS_NO_STATUS:
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case 0:
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*mode = WM_CDM_STOPPED;
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break;
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}
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return (0);
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} /* gen_get_drive_status() */
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/*
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* Get the number of tracks on the CD.
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*/
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int
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gen_get_trackcount(struct wm_drive *d, int *tracks)
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{
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struct ioc_toc_header hdr;
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if (ioctl(d->fd, CDIOREADTOCHEADER, &hdr) == -1)
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return (-1);
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*tracks = hdr.ending_track - hdr.starting_track + 1;
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return (0);
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} /* gen_get_trackcount() */
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/*
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* Get the start time and mode (data or audio) of a track.
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*
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* XXX - this should get cached, but that means keeping track of ejects.
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*/
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int
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gen_get_trackinfo(struct wm_drive *d, int track, int *data, int *startframe)
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{
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struct ioc_read_toc_entry toc;
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struct cd_toc_entry toc_buffer;
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bzero((char *)&toc_buffer, sizeof(toc_buffer));
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toc.address_format = CD_MSF_FORMAT;
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toc.starting_track = track;
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toc.data_len = sizeof(toc_buffer);
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toc.data = &toc_buffer;
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if (ioctl(d->fd, CDIOREADTOCENTRYS, &toc))
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return (-1);
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*data = ((toc_buffer.control & 0x4) != 0);
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*startframe = toc_buffer.addr.msf.minute*60*75 +
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toc_buffer.addr.msf.second * 75 +
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toc_buffer.addr.msf.frame;
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return (0);
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} /* gen_get_trackinfo() */
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/*
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* Get the number of frames on the CD.
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*/
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int
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gen_get_cdlen(struct wm_drive *d, int *frames)
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{
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int tmp;
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struct ioc_toc_header hdr;
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int status;
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#define LEADOUT 0xaa /* see scsi.c. what a hack! */
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return gen_get_trackinfo(d, LEADOUT, &tmp, frames);
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} /* gen_get_cdlen() */
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/*
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* Play the CD from one position to another (both in frames.)
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*/
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int
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gen_play(struct wm_drive *d, int start, int end)
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{
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struct ioc_play_msf msf;
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msf.start_m = start / (60*75);
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msf.start_s = (start % (60*75)) / 75;
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msf.start_f = start % 75;
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msf.end_m = end / (60*75);
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msf.end_s = (end % (60*75)) / 75;
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msf.end_f = end % 75;
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if (ioctl(d->fd, CDIOCSTART))
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return (-1);
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if (ioctl(d->fd, CDIOCPLAYMSF, &msf))
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return (-2);
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return (0);
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} /* gen_play() */
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/*
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* Pause the CD.
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*/
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int
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gen_pause(struct wm_drive *d)
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{
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return (ioctl(d->fd, CDIOCPAUSE));
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} /* gen_pause() */
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/*
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* Resume playing the CD (assuming it was paused.)
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*/
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int
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gen_resume(struct wm_drive *d)
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{
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return (ioctl(d->fd, CDIOCRESUME));
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} /* gen_resume() */
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/*
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* Stop the CD.
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*/
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int
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gen_stop(struct wm_drive *d)
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{
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return (ioctl(d->fd, CDIOCSTOP));
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} /* gen_stop() */
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/*
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* Eject the current CD, if there is one.
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*/
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int
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gen_eject(struct wm_drive *d)
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{
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/* On some systems, we can check to see if the CD is mounted. */
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struct stat stbuf;
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struct statfs buf;
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int rval;
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if (fstat(d->fd, &stbuf) != 0)
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return (-2);
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/* Is this a mounted filesystem? */
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if (fstatfs(stbuf.st_rdev, &buf) == 0)
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return (-3);
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rval = ioctl(d->fd, CDIOCALLOW);
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if (rval == 0)
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rval = ioctl(d->fd, CDIOCEJECT);
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if (rval == 0)
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rval = ioctl(d->fd, CDIOCPREVENT);
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if (rval == 0)
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rval = close(d->fd);
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if (rval == 0)
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d->fd = -1;
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return rval;
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} /* gen_eject() */
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/*----------------------------------------*
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* Close the CD tray
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*
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* Please edit and send changes to
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* milliByte@DeathsDoor.com
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*----------------------------------------*/
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int
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gen_closetray(struct wm_drive *d)
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{
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#ifdef CAN_CLOSE
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if(!close(d->fd))
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{
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d->fd=-1;
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return(wmcd_reopen(d));
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} else {
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return(-1);
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}
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#else
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/* Always succeed if the drive can't close */
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return(0);
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#endif /* CAN_CLOSE */
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} /* gen_closetray() */
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/*
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* scale_volume(vol, max)
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*
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* Return a volume value suitable for passing to the CD-ROM drive. "vol"
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* is a volume slider setting; "max" is the slider's maximum value.
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*
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* On Sun and DEC CD-ROM drives, the amount of sound coming out the jack
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* increases much faster toward the top end of the volume scale than it
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* does at the bottom. To make up for this, we make the volume scale look
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* sort of logarithmic (actually an upside-down inverse square curve) so
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* that the volume value passed to the drive changes less and less as you
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* approach the maximum slider setting. The actual formula looks like
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*
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* (max^2 - (max - vol)^2) * (max_volume - min_volume)
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* v = --------------------------------------------------- + min_volume
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* max^2
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*
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* If your system's volume settings aren't broken in this way, something
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* like the following should work:
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*
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* return ((vol * (max_volume - min_volume)) / max + min_volume);
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*/
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static int
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scale_volume(int vol, int max)
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{
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return ((vol * (max_volume - min_volume)) / max + min_volume);
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} /* scale_volume() */
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/*
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* unscale_volume(cd_vol, max)
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*
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* Given a value between min_volume and max_volume, return the volume slider
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* value needed to achieve that value.
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*
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* Rather than perform floating-point calculations to reverse the above
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* formula, we simply do a binary search of scale_volume()'s return values.
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*/
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static int
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unscale_volume(int cd_vol, int max)
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{
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int vol = 0, top = max, bot = 0, scaled;
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while (bot <= top)
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{
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vol = (top + bot) / 2;
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scaled = scale_volume(vol, max);
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if (cd_vol == scaled)
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break;
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if (cd_vol < scaled)
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top = vol - 1;
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else
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bot = vol + 1;
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}
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if (vol < 0)
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vol = 0;
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else if (vol > max)
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vol = max;
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return (vol);
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} /* unscale_volume() */
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/*
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* Set the volume level for the left and right channels. Their values
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* range from 0 to 100.
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*/
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int
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gen_set_volume(struct wm_drive *d, int left, int right)
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{
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struct ioc_vol vol;
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if (left < 0) /* don't laugh, I saw this happen once! */
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left = 0;
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if (right < 0)
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right = 0;
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left = scale_volume(left, 100);
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right = scale_volume(right, 100);
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bzero((char *)&vol, sizeof(vol));
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vol.vol[LEFT_PORT] = left;
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vol.vol[RIGHT_PORT] = right;
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if (ioctl(d->fd, CDIOCSETVOL, &vol))
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return (-1);
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return (0);
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} /* gen_set_volume() */
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/*
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* Read the initial volume from the drive, if available. Each channel
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* ranges from 0 to 100, with -1 indicating data not available.
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*/
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int
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gen_get_volume(struct wm_drive *d, int *left, int *right)
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{
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struct ioc_vol vol;
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if (d->fd >= 0)
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{
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bzero((char *)&vol, sizeof(vol));
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if (ioctl(d->fd, CDIOCGETVOL, &vol))
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*left = *right = -1;
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else
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{
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*left = unscale_volume(vol.vol[LEFT_PORT], 100);
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*right = unscale_volume(vol.vol[RIGHT_PORT], 100);
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}
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}
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else
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*left = *right = -1;
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return (0);
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} /* gen_get_volume() */
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/*------------------------------------------------------------------------*
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* gen_get_cdtext(drive, buffer, lenght)
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*------------------------------------------------------------------------*/
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int
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gen_get_cdtext(struct wm_drive *d, unsigned char **pp_buffer, int *p_buffer_lenght)
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{
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return -1; /* no SCSI, no CDTEXT */
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} /* gen_get_cdtext() */
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#endif
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