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129 lines
3.3 KiB
C
129 lines
3.3 KiB
C
/* gstcdplay
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* Copyright (c) 2002 Charles Schmidt <cbschmid@uiuc.edu>
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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
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "gstcdplayer_ioctl.h"
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <sys/ioctl.h>
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#include <errno.h>
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/* private functions */
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static void cd_fix_track_range (struct cd *cd, gint * start_track,
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gint * end_track);
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static gint cddb_sum (gint n);
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#if defined(HAVE_LINUX_CDROM_H)
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#include <linux/cdrom.h>
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#elif defined(HAVE_SYS_CDIO_H)
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#include <sys/cdio.h>
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/*
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irix cdaudio works quite a bit differently than ioctl(), so its not ready
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#elif defined(HAVE_DMEDIA_CDAUDIO_H)
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#include <dmedia/cdaudio.h>
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*/
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#endif
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/* these headers define low level functions:
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gboolean cd_init(struct cd *cd,const gchar *device);
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gboolean cd_start(struct cd *cd,gint start_track,gint end_track);
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gboolean cd_pause(struct cd *cd);
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gboolean cd_resume(struct cd *cd);
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gboolean cd_stop(struct cd *cd);
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CDStatus cd_status(struct cd *cd);
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gint cd_current_track(struct cd *cd);
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gboolean cd_close(struct cd *cd);
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*/
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#if defined(HAVE_CDROM_SOLARIS)
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#include "gstcdplayer_ioctl_solaris.h"
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#elif defined(HAVE_CDROM_BSD)
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#include "gstcdplayer_ioctl_bsd.h"
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/*
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#elif defined(HAVE_CDROM_IRIX)
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#include "gstcdplayer_ioctl_irix.h"
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*/
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#endif
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static void
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cd_fix_track_range (struct cd *cd, gint * start_track, gint * end_track)
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{
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if (*start_track <= 0) {
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*start_track = 1;
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}
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if (*start_track > cd->num_tracks) {
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*start_track = cd->num_tracks;
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}
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if (*end_track < *start_track && *end_track != LEADOUT) {
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*end_track = *start_track;
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}
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if (*end_track > cd->num_tracks || *end_track + 1 > cd->num_tracks) {
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*end_track = LEADOUT;
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}
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return;
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}
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/* this cddb info is from
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http://www.freedb.org/modules.php?name=Sections&sop=viewarticle&artid=6
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this will probably be of interest to anyone wishing to actually use the discid
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http://www.freedb.org/modules.php?name=Sections&sop=viewarticle&artid=28
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*/
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static gint
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cddb_sum (gint n)
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{
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gint ret = 0;
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while (n > 0) {
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ret += n % 10;
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n /= 10;
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}
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return ret;
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}
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guint32
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cd_cddb_discid (struct cd * cd)
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{
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guint i;
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guint n = 0;
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guint t;
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for (i = 1; i <= cd->num_tracks; i++) {
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n += cddb_sum (cd->tracks[i].minute * 60 + cd->tracks[i].second);
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}
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t = (cd->tracks[LEADOUT].minute * 60 + cd->tracks[LEADOUT].second) -
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(cd->tracks[1].minute * 60 + cd->tracks[1].second);
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return ((n % 0xff) << 24 | t << 8 | (cd->num_tracks));
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}
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