include/sound/seq_midi_event.h

   1 #ifndef __SOUND_SEQ_MIDI_EVENT_H
   2 #define __SOUND_SEQ_MIDI_EVENT_H
   3
   4 /*
   5  *  MIDI byte <-> sequencer event coder
   6  *
   7  *  Copyright (C) 1998,99 Takashi Iwai <tiwai@suse.de>,
   8  *                        Jaroslav Kysela <perex@perex.cz>
   9  *
  10  *   This program is free software; you can redistribute it and/or modify
  11  *   it under the terms of the GNU General Public License as published by
  12  *   the Free Software Foundation; either version 2 of the License, or
  13  *   (at your option) any later version.
  14  *
  15  *   This program is distributed in the hope that it will be useful,
  16  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  *   GNU General Public License for more details.
  19  *
  20  *   You should have received a copy of the GNU General Public License
  21  *   along with this program; if not, write to the Free Software
  22  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  23  */
  24
  25 #include <sound/asequencer.h>
  26
  27 #define MAX_MIDI_EVENT_BUF      256
  28
  29 /* midi status */
  30 struct snd_midi_event {
  31         int qlen;               /* queue length */
  32         int read;               /* chars read */
  33         int type;               /* current event type */
  34         unsigned char lastcmd;  /* last command (for MIDI state handling) */
  35         unsigned char nostat;   /* no state flag */
  36         int bufsize;            /* allocated buffer size */
  37         unsigned char *buf;     /* input buffer */
  38         spinlock_t lock;
  39 };
  40
  41 int snd_midi_event_new(int bufsize, struct snd_midi_event **rdev);
  42 void snd_midi_event_free(struct snd_midi_event *dev);
  43 void snd_midi_event_reset_encode(struct snd_midi_event *dev);
  44 void snd_midi_event_reset_decode(struct snd_midi_event *dev);
  45 void snd_midi_event_no_status(struct snd_midi_event *dev, int on);
  46 bool snd_midi_event_encode_byte(struct snd_midi_event *dev, unsigned char c,
  47                                 struct snd_seq_event *ev);
  48 /* decode from event to bytes - return number of written bytes if success */
  49 long snd_midi_event_decode(struct snd_midi_event *dev, unsigned char *buf, long count,
  50                            struct snd_seq_event *ev);
  51
  52 #endif /* __SOUND_SEQ_MIDI_EVENT_H */