sound/core/seq/oss/seq_oss_timer.h

   1 /*
   2  * OSS compatible sequencer driver
   3  * timer handling routines
   4  *
   5  * Copyright (C) 1998,99 Takashi Iwai <tiwai@suse.de>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  20  */
  21
  22 #ifndef __SEQ_OSS_TIMER_H
  23 #define __SEQ_OSS_TIMER_H
  24
  25 #include "seq_oss_device.h"
  26
  27 /*
  28  * timer information definition
  29  */
  30 struct seq_oss_timer_t {
  31         seq_oss_devinfo_t *dp;
  32         reltime_t cur_tick;
  33         int realtime;
  34         int running;
  35         int tempo, ppq; /* ALSA queue */
  36         int oss_tempo, oss_timebase;
  37 };
  38
  39
  40 seq_oss_timer_t *snd_seq_oss_timer_new(seq_oss_devinfo_t *dp);
  41 void snd_seq_oss_timer_delete(seq_oss_timer_t *dp);
  42
  43 int snd_seq_oss_timer_start(seq_oss_timer_t *timer);
  44 int snd_seq_oss_timer_stop(seq_oss_timer_t *timer);
  45 int snd_seq_oss_timer_continue(seq_oss_timer_t *timer);
  46 int snd_seq_oss_timer_tempo(seq_oss_timer_t *timer, int value);
  47 #define snd_seq_oss_timer_reset  snd_seq_oss_timer_start
  48
  49 int snd_seq_oss_timer_ioctl(seq_oss_timer_t *timer, unsigned int cmd, int __user *arg);
  50
  51 /*
  52  * get current processed time
  53  */
  54 static inline abstime_t
  55 snd_seq_oss_timer_cur_tick(seq_oss_timer_t *timer)
  56 {
  57         return timer->cur_tick;
  58 }
  59
  60
  61 /*
  62  * is realtime event?
  63  */
  64 static inline int
  65 snd_seq_oss_timer_is_realtime(seq_oss_timer_t *timer)
  66 {
  67         return timer->realtime;
  68 }
  69
  70 #endif