LXR linux/sound/core/seq/oss/seq_oss

   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 */
  30struct seq_oss_timer {
  31        struct seq_oss_devinfo *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
  40struct seq_oss_timer *snd_seq_oss_timer_new(struct seq_oss_devinfo *dp);
  41void snd_seq_oss_timer_delete(struct seq_oss_timer *dp);
  42
  43int snd_seq_oss_timer_start(struct seq_oss_timer *timer);
  44int snd_seq_oss_timer_stop(struct seq_oss_timer *timer);
  45int snd_seq_oss_timer_continue(struct seq_oss_timer *timer);
  46int snd_seq_oss_timer_tempo(struct seq_oss_timer *timer, int value);
  47#define snd_seq_oss_timer_reset  snd_seq_oss_timer_start
  48
  49int snd_seq_oss_timer_ioctl(struct seq_oss_timer *timer, unsigned int cmd, int __user *arg);
  50
  51/*
  52 * get current processed time
  53 */
  54static inline abstime_t
  55snd_seq_oss_timer_cur_tick(struct seq_oss_timer *timer)
  56{
  57        return timer->cur_tick;
  58}
  59
  60
  61/*
  62 * is realtime event?
  63 */
  64static inline int
  65snd_seq_oss_timer_is_realtime(struct seq_oss_timer *timer)
  66{
  67        return timer->realtime;
  68}
  69
  70#endif
  71