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804 lines
21 KiB
804 lines
21 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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* Linux-specific drive control routines. Very similar to the Sun module.
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*/
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#if defined(__linux__)
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <sys/wait.h>
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/* Try to get around bug #29274 */
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#include <linux/version.h>
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#if 0
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/* this breaks the build on ia64 and s390 for example.
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sys/types.h is already included and should provide __u64.
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please tell where we really need this and let's try to find
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a working #if case for everyone ... adrian@suse.de */
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#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,50)) || (LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,21) && LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
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#undef __GNUC__
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typedef unsigned long long __u64;
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#endif
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#endif
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#include "include/wm_config.h"
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#include "include/wm_struct.h"
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#include "include/wm_cdtext.h"
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#if defined(BSD_MOUNTTEST)
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#include <mntent.h>
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#else
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/*
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* this is for glibc 2.x which defines ust structure in
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* ustat.h not stat.h
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*/
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#ifdef __GLIBC__
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#include <sys/ustat.h>
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#endif
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#endif
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#include <sys/time.h>
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#include <sys/ioctl.h>
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#ifndef __GNUC__
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#define __GNUC__ 1
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#endif
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/* needed for vanilla kernel headers, which do provide __u64 only
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for ansi */
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#undef __STRICT_ANSI__
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/* needed for non-ansi kernel headers */
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#define asm __asm__
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#define inline __inline__
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#include <asm/types.h>
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#include <linux/cdrom.h>
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#undef asm
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#undef inline
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#include "include/wm_cdda.h"
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#include "include/wm_struct.h"
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#include "include/wm_platform.h"
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#include "include/wm_cdrom.h"
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#include "include/wm_scsi.h"
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#include "include/wm_helpers.h"
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#ifdef OSS_SUPPORT
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#include <linux/soundcard.h>
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#define CD_CHANNEL SOUND_MIXER_CD
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#endif
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#define WM_MSG_CLASS WM_MSG_CLASS_PLATFORM
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#define max(a,b) ((a) > (b) ? (a) : (b))
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#ifdef LINUX_SCSI_PASSTHROUGH
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/* this is from <scsi/scsi_ioctl.h> */
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# define SCSI_IOCTL_SEND_COMMAND 1
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#endif
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#ifdef BUILD_CDDA
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int gen_cdda_init( struct wm_drive *d );
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#endif
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int min_volume = 0;
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int max_volume = 255;
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#ifdef OSS_SUPPORT
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int mixer;
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char mixer_dev_name[20] = "/dev/mixer";
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#endif
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/*-------------------------------------------------------*
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*
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*
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* CD-ROM drive functions.
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*
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*
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*-------------------------------------------------------*/
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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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/*---------------------------------------------------------------------------*
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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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char vendor[32], model[32], rev[32];
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if (d->cd_device == NULL)
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d->cd_device = DEFAULT_CD_DEVICE;
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if (d->fd >= 0) { /* Device already open? */
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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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fd = open(d->cd_device, O_RDONLY | O_NONBLOCK);
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wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "wmcd_open(): device=%s fd=%d\n", d->cd_device, fd);
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if (fd < 0)
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return -errno;
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/* Now fill in the relevant parts of the wm_drive structure. */
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d->fd = fd;
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/*
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* See if we can do digital audio.
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*/
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#if defined(BUILD_CDDA)
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if(d->cdda && gen_cdda_init(d)) {
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wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "wmcd_open(): failed in gen_cdda_init\n");
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gen_close(d);
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return -1;
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}
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#endif
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/* Can we figure out the drive type? */
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if (wm_scsi_get_drive_type(d, vendor, model, rev)) {
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wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "wmcd_open(): inquiry failed\n");
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strcpy(vendor, "Generic");
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strcpy(model, "drive type");
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strcpy(rev, "");
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}
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if(find_drive_struct(vendor, model, rev) < 0) {
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gen_close(d);
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return -1;
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}
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if(d->proto->gen_init)
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return (d->proto->gen_init)(d);
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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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int tries = 0;
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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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gen_close(d);
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wm_susleep( 1000 );
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wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "calls 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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tries++;
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} while ( (status != 0) && (tries < 10) );
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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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int
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wm_scsi( struct wm_drive *d, unsigned char *cdb, int cdblen,
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void *retbuf, int retbuflen, int getreply )
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{
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#ifdef LINUX_SCSI_PASSTHROUGH
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char *cmd;
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int cmdsize;
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cmdsize = 2 * sizeof(int);
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if (retbuf)
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{
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if (getreply) cmdsize += max(cdblen, retbuflen);
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else cmdsize += (cdblen + retbuflen);
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}
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else cmdsize += cdblen;
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cmd = malloc(cmdsize);
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if (cmd == NULL)
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return (-1);
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((int*)cmd)[0] = cdblen + ((retbuf && !getreply) ? retbuflen : 0);
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((int*)cmd)[1] = ((retbuf && getreply) ? retbuflen : 0);
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memcpy(cmd + 2*sizeof(int), cdb, cdblen);
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if (retbuf && !getreply)
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memcpy(cmd + 2*sizeof(int) + cdblen, retbuf, retbuflen);
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if (ioctl(d->fd, SCSI_IOCTL_SEND_COMMAND, cmd))
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{
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wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "%s: ioctl() failure\n", __FILE__);
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wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "command buffer is:\n");
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wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "%02x %02x %02x %02x %02x %02x\n",
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cmd[0], cmd[1], cmd[2], cmd[3], cmd[4], cmd[5]);
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free(cmd);
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return (-1);
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}
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if (retbuf && getreply)
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memcpy(retbuf, cmd + 2*sizeof(int), retbuflen);
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free(cmd);
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return 0;
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#else /* Linux SCSI passthrough*/
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/*----------------------------------------*
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* send packet over cdrom interface
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* kernel >= 2.2.16
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*----------------------------------------*/
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#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,2,15))
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struct cdrom_generic_command cdc;
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struct request_sense sense;
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int capability;
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wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "wm_scsi over CDROM_SEND_PACKET entered\n");
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capability = ioctl(d->fd, CDROM_GET_CAPABILITY);
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if(!(capability & CDC_GENERIC_PACKET))
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{
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wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "your CDROM or/and kernel don't support CDC_GENERIC_PACKET ...\n");
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return -1;
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}
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memset(&cdc, 0, sizeof(struct cdrom_generic_command));
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memset(&sense, 0, sizeof(struct request_sense));
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memcpy(cdc.cmd, cdb, cdblen);
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cdc.buffer = retbuf;
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cdc.buflen = retbuflen;
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cdc.stat = 0;
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cdc.sense = &sense;
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cdc.data_direction = getreply?CGC_DATA_READ:CGC_DATA_WRITE;
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/* sendpacket_over_cdrom_interface() */
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return ioctl(d->fd, CDROM_SEND_PACKET, &cdc);
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#endif /* CDROM_SEND_PACKET */
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printf("ERROR: this binary was compiled without CDROM GENERIC PACKET SUPPORT. kernel version < 2.2.16?\n");
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printf("ERROR: if you have a SCSI CDROM, rebuild it with a #define LINUX_SCSI_PASSTHROUGH\n");
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return (-1);
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#endif
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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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d->fd = -1;
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}
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return 0;
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}
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/*--------------------------------*
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* Keep the CD open all the time.
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* disabled, analogous to 1.4b3
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*--------------------------------*
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void
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keep_cd_open( void )
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{
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int fd;
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struct flock fl;
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extern end;
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for (fd = 0; fd < 256; fd++)
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close(fd);
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if (fork())
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exit(0);
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#if defined(O_NOFOLLOW)
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if ((fd = open("/tmp/cd.lock", O_RDWR | O_CREAT | O_NOFOLLOW, 0666)) < 0)
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#else
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if ((fd = open("/tmp/cd.lock", O_RDWR | O_CREAT, 0666)) < 0)
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#endif
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exit(0);
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fl.l_type = F_WRLCK;
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fl.l_whence = 0;
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fl.l_start = 0;
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fl.l_len = 0;
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if (fcntl(fd, F_SETLK, &fl) < 0)
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exit(0);
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if (open(cd_device, 0) >= 0)
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{
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brk(&end);
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pause();
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}
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exit(0);
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}
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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 *ind )
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{
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struct cdrom_subchnl sc;
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int ret;
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#ifdef SBPCD_HACK
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static int prevpos = 0;
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#endif
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/* Is the device open? */
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if (d->fd < 0) {
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ret = wmcd_open(d);
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if(ret < 0) /* error */
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return ret;
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if(ret == 1) {
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/* retry */
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*mode = WM_CDM_UNKNOWN;
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return 0;
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}
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}
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/* Try to get rid of the door locking */
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/* Don't care about return value. If it */
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/* works - fine. If not - ... */
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ioctl(d->fd, CDROM_LOCKDOOR, 0);
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*mode = WM_CDM_UNKNOWN;
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sc.cdsc_format = CDROM_MSF;
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#if defined(BUILD_CDDA)
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IFCDDA(d) {
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if(!cdda_get_drive_status(d, oldmode, mode, pos, track, ind)) {
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if(*mode == WM_CDM_STOPPED)
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*mode = WM_CDM_UNKNOWN; /* dont believe */
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}
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} else
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#endif
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if(!ioctl(d->fd, CDROMSUBCHNL, &sc)) {
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switch (sc.cdsc_audiostatus) {
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case CDROM_AUDIO_PLAY:
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*mode = WM_CDM_PLAYING;
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*track = sc.cdsc_trk;
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*ind = sc.cdsc_ind;
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*pos = sc.cdsc_absaddr.msf.minute * 60 * 75 +
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sc.cdsc_absaddr.msf.second * 75 +
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sc.cdsc_absaddr.msf.frame;
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#ifdef SBPCD_HACK
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if( *pos < prevpos ) {
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if( (prevpos - *pos) < 75 ) {
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*mode = WM_CDM_TRACK_DONE;
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}
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}
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prevpos = *pos;
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#endif
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break;
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case CDROM_AUDIO_PAUSED:
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if (oldmode == WM_CDM_PLAYING || oldmode == WM_CDM_PAUSED) {
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*mode = WM_CDM_PAUSED;
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*track = sc.cdsc_trk;
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*ind = sc.cdsc_ind;
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*pos = sc.cdsc_absaddr.msf.minute * 60 * 75 +
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sc.cdsc_absaddr.msf.second * 75 +
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sc.cdsc_absaddr.msf.frame;
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} else
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*mode = WM_CDM_STOPPED;
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break;
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case CDROM_AUDIO_NO_STATUS:
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*mode = WM_CDM_STOPPED;
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break;
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case CDROM_AUDIO_COMPLETED:
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*mode = WM_CDM_TRACK_DONE; /* waiting for next track. */
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break;
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case CDROM_AUDIO_INVALID: /**/
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default:
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*mode = WM_CDM_UNKNOWN;
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break;
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}
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}
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if(WM_CDS_NO_DISC(*mode)) {
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/* verify status of drive */
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ret = ioctl(d->fd, CDROM_DRIVE_STATUS, 0/* slot */);
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if(ret == CDS_DISC_OK)
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ret = ioctl(d->fd, CDROM_DISC_STATUS, 0);
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switch(ret) {
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case CDS_NO_DISC:
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*mode = WM_CDM_NO_DISC;
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break;
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case CDS_TRAY_OPEN:
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*mode = WM_CDM_EJECTED;
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break;
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case CDS_AUDIO:
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case CDS_MIXED:
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*mode = WM_CDM_STOPPED;
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break;
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case CDS_DRIVE_NOT_READY:
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case CDS_NO_INFO:
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case CDS_DATA_1:
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case CDS_DATA_2:
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case CDS_XA_2_1:
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case CDS_XA_2_2:
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default:
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*mode = WM_CDM_UNKNOWN;
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}
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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 cdrom_tochdr hdr;
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if (ioctl(d->fd, CDROMREADTOCHDR, &hdr))
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return (-1);
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*tracks = hdr.cdth_trk1;
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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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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 cdrom_tocentry entry;
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entry.cdte_track = track;
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entry.cdte_format = CDROM_MSF;
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if (ioctl(d->fd, CDROMREADTOCENTRY, &entry))
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return (-1);
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*startframe = entry.cdte_addr.msf.minute * 60 * 75 +
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entry.cdte_addr.msf.second * 75 +
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entry.cdte_addr.msf.frame;
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*data = entry.cdte_ctrl & CDROM_DATA_TRACK ? 1 : 0;
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return (0);
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}
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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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{
|
|
int tmp;
|
|
|
|
return gen_get_trackinfo( d, CDROM_LEADOUT, &tmp, frames);
|
|
} /* gen_get_cdlen() */
|
|
|
|
|
|
/*------------------------------------------------------------*
|
|
* Play the CD from one position to another (both in frames.)
|
|
*------------------------------------------------------------*/
|
|
int
|
|
gen_play(struct wm_drive *d, int start, int end, int realstart)
|
|
{
|
|
struct cdrom_msf msf;
|
|
|
|
CDDARETURN(d) cdda_play(d, start, end, realstart);
|
|
|
|
msf.cdmsf_min0 = start / (60*75);
|
|
msf.cdmsf_sec0 = (start % (60*75)) / 75;
|
|
msf.cdmsf_frame0 = start % 75;
|
|
msf.cdmsf_min1 = end / (60*75);
|
|
msf.cdmsf_sec1 = (end % (60*75)) / 75;
|
|
msf.cdmsf_frame1 = end % 75;
|
|
|
|
if (ioctl(d->fd, CDROMPLAYMSF, &msf)) {
|
|
if (ioctl(d->fd, CDROMSTART))
|
|
return (-1);
|
|
if (ioctl(d->fd, CDROMPLAYMSF, &msf))
|
|
return (-2);
|
|
}
|
|
|
|
/*
|
|
* I hope no drive gets really confused after CDROMSTART
|
|
* If so, I need to make this run-time configurable.
|
|
*
|
|
#ifndef FAST_IDE
|
|
if (ioctl( d->fd, CDROMSTART))
|
|
return (-1);
|
|
#endif
|
|
if (ioctl( d->fd, CDROMPLAYMSF, &msf ))
|
|
return (-2);
|
|
*/
|
|
|
|
return (0);
|
|
} /* gen_play() */
|
|
|
|
/*---------------*
|
|
* Pause the CD.
|
|
*---------------*/
|
|
int
|
|
gen_pause(struct wm_drive *d)
|
|
{
|
|
CDDARETURN(d) cdda_pause(d);
|
|
return (ioctl(d->fd, CDROMPAUSE));
|
|
}
|
|
|
|
/*-------------------------------------------------*
|
|
* Resume playing the CD (assuming it was paused.)
|
|
*-------------------------------------------------*/
|
|
int
|
|
gen_resume(struct wm_drive *d)
|
|
{
|
|
CDDARETURN(d) cdda_pause(d);
|
|
return (ioctl(d->fd, CDROMRESUME));
|
|
}
|
|
|
|
/*--------------*
|
|
* Stop the CD.
|
|
*--------------*/
|
|
int
|
|
gen_stop(struct wm_drive *d)
|
|
{
|
|
CDDARETURN(d) cdda_stop(d);
|
|
return (ioctl(d->fd, CDROMSTOP));
|
|
}
|
|
|
|
|
|
/*----------------------------------------*
|
|
* Eject the current CD, if there is one.
|
|
*----------------------------------------*/
|
|
int
|
|
gen_eject(struct wm_drive *d)
|
|
{
|
|
struct stat stbuf;
|
|
#if !defined(BSD_MOUNTTEST)
|
|
struct ustat ust;
|
|
#else
|
|
struct mntent *mnt;
|
|
FILE *fp;
|
|
#endif
|
|
|
|
wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "ejecting?\n");
|
|
|
|
if (fstat(d->fd, &stbuf) != 0) {
|
|
wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "that weird fstat() thingy\n");
|
|
return (-2);
|
|
}
|
|
|
|
/* Is this a mounted filesystem? */
|
|
#if !defined(BSD_MOUNTTEST)
|
|
if (ustat(stbuf.st_rdev, &ust) == 0)
|
|
return (-3);
|
|
#else
|
|
/*
|
|
* This is the same test as in the WorkBone interface.
|
|
* I should eliminate it there, because there is no need
|
|
* for it in the UI
|
|
*/
|
|
/* check if drive is mounted (from Mark Buckaway's cdplayer code) */
|
|
/* Changed it again (look at XPLAYCD from ???? */
|
|
/* It's better to check the device name rather than one device is */
|
|
/* mounted as iso9660. That prevents "no playing" if you have more*/
|
|
/* than one CD-ROM, and one of them is mounted, but it's not the */
|
|
/* audio CD -dirk */
|
|
if ((fp = setmntent (MOUNTED, "r")) == NULL)
|
|
{
|
|
wm_lib_message(WM_MSG_LEVEL_ERROR|WM_MSG_CLASS, "Could not open %s: %s\n", MOUNTED, strerror (errno));
|
|
return(-3);
|
|
}
|
|
while ((mnt = getmntent (fp)) != NULL)
|
|
{
|
|
if (strcmp (mnt->mnt_fsname, d->cd_device) == 0)
|
|
{
|
|
wm_lib_message(WM_MSG_LEVEL_ERROR|WM_MSG_CLASS, "CDROM already mounted (according to mtab). Operation aborted.\n");
|
|
endmntent (fp);
|
|
return(-3);
|
|
}
|
|
}
|
|
endmntent (fp);
|
|
#endif /* BSD_MOUNTTEST */
|
|
|
|
IFCDDA(d) {
|
|
cdda_eject(d);
|
|
}
|
|
|
|
ioctl( d->fd, CDROM_LOCKDOOR, 0 );
|
|
|
|
if (ioctl(d->fd, CDROMEJECT))
|
|
{
|
|
wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "eject failed (%s).\n", strerror(errno));
|
|
return (-1);
|
|
}
|
|
|
|
/*------------------
|
|
* Things in "foobar_one" are left over from 1.4b3
|
|
* I put them here for further observation. In 1.4b3, however,
|
|
* that workaround didn't help at least for /dev/sbpcd
|
|
* (The tray closed just after ejecting because re-opening the
|
|
* device causes the tray to close)
|
|
*------------------*/
|
|
#ifdef foobar_one
|
|
extern int intermittent_dev
|
|
/*
|
|
* Some drives (drivers?) won't recognize a new CD if we leave the
|
|
* device open.
|
|
*/
|
|
if (intermittent_dev)
|
|
gen_close(d);
|
|
#endif
|
|
|
|
return (0);
|
|
} /* gen_eject() */
|
|
|
|
/*----------------------------------------*
|
|
* Close the CD tray
|
|
*----------------------------------------*/
|
|
|
|
int
|
|
gen_closetray(struct wm_drive *d)
|
|
{
|
|
#ifdef CAN_CLOSE
|
|
#ifdef CDROMCLOSETRAY
|
|
wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "CDROMCLOSETRAY closing tray...\n");
|
|
if (ioctl(d->fd, CDROMCLOSETRAY))
|
|
return (-1);
|
|
#else
|
|
wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "wmcd_reopen() closing tray...\n");
|
|
if(!gen_close(d))
|
|
{
|
|
return(wmcd_reopen(d));
|
|
} else {
|
|
return(-1);
|
|
}
|
|
#endif /* CDROMCLOSETRAY */
|
|
#endif /* CAN_CLOSE */
|
|
/* Always succeed if the drive can't close. */
|
|
return(0);
|
|
} /* gen_closetray() */
|
|
|
|
|
|
/*------------------------------------------------------------------------*
|
|
* 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.
|
|
* This is not used if sound card support is enabled.
|
|
*
|
|
*------------------------------------------------------------------------*/
|
|
static int
|
|
scale_volume( int vol, int max )
|
|
{
|
|
#ifdef CURVED_VOLUME
|
|
return ((max * max - (max - vol) * (max - vol)) *
|
|
(max_volume - min_volume) / (max * max) + min_volume);
|
|
#else
|
|
return ((vol * (max_volume - min_volume)) / max + min_volume);
|
|
#endif
|
|
} /* scale_volume() */
|
|
|
|
static int
|
|
unscale_volume( int vol, int max )
|
|
{
|
|
#ifdef CURVED_VOLUME
|
|
/* FIXME do it simpler */
|
|
int tmp = (((max_volume - min_volume - vol) * max * max) - (vol + min_volume));
|
|
return max - sqrt((tmp/(max_volume - min_volume)));
|
|
#else
|
|
return (((vol - min_volume) * max) / (max_volume - min_volume));
|
|
#endif
|
|
} /* unscale_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 cdrom_volctrl v;
|
|
|
|
CDDARETURN(d) cdda_set_volume(d, left, right);
|
|
|
|
/* Adjust the volume to make up for the CD-ROM drive's weirdness. */
|
|
left = scale_volume(left, 100);
|
|
right = scale_volume(right, 100);
|
|
|
|
v.channel0 = v.channel2 = left < 0 ? 0 : left > 255 ? 255 : left;
|
|
v.channel1 = v.channel3 = right < 0 ? 0 : right > 255 ? 255 : right;
|
|
|
|
return (ioctl(d->fd, CDROMVOLCTRL, &v));
|
|
} /* gen_set_volume() */
|
|
|
|
/*---------------------------------------------------------------------*
|
|
* Read the 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 cdrom_volctrl v;
|
|
|
|
CDDARETURN(d) cdda_get_volume(d, left, right);
|
|
|
|
#if defined(CDROMVOLREAD)
|
|
if(!ioctl(d->fd, CDROMVOLREAD, &v)) {
|
|
*left = unscale_volume((v.channel0 + v.channel2)/2, 100);
|
|
*right = unscale_volume((v.channel1 + v.channel3)/2, 100);
|
|
} else
|
|
#endif
|
|
/* Suns, HPs, Linux, NEWS can't read the volume; oh well */
|
|
*left = *right = -1;
|
|
|
|
return 0;
|
|
} /* gen_get_volume() */
|
|
|
|
/*------------------------------------------------------------------------*
|
|
* gen_get_cdtext(drive, buffer, lenght)
|
|
*
|
|
* Return a buffer with cdtext-stream. buffer will be allocated and filled
|
|
*
|
|
* needs send packet interface -> for IDE, linux at 2.2.16
|
|
* depends on scsi.c which depends on wm_scsi defined in here
|
|
* (which also takes care of IDE drives)
|
|
*------------------------------------------------------------------------*/
|
|
|
|
int
|
|
gen_get_cdtext(struct wm_drive *d, unsigned char **pp_buffer, int *p_buffer_lenght)
|
|
{
|
|
return wm_scsi_get_cdtext(d, pp_buffer, p_buffer_lenght);
|
|
} /* gen_get_cdtext() */
|
|
|
|
#endif /* __linux__ */
|