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@suse.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 "asequencer.h"
  26
  27 #define MAX_MIDI_EVENT_BUF      256
  28
  29 typedef struct snd_midi_event_t snd_midi_event_t;
  30
  31 /* midi status */
  32 struct snd_midi_event_t {
  33         int qlen;               /* queue length */
  34         int read;               /* chars read */
  35         int type;               /* current event type */
  36         unsigned char lastcmd;  /* last command (for MIDI state handling) */
  37         unsigned char nostat;   /* no state flag */
  38         int bufsize;            /* allocated buffer size */
  39         unsigned char *buf;     /* input buffer */
  40         spinlock_t lock;
  41 };
  42
  43 int snd_midi_event_new(int bufsize, snd_midi_event_t **rdev);
  44 int snd_midi_event_resize_buffer(snd_midi_event_t *dev, int bufsize);
  45 void snd_midi_event_free(snd_midi_event_t *dev);
  46 void snd_midi_event_init(snd_midi_event_t *dev);
  47 void snd_midi_event_reset_encode(snd_midi_event_t *dev);
  48 void snd_midi_event_reset_decode(snd_midi_event_t *dev);
  49 void snd_midi_event_no_status(snd_midi_event_t *dev, int on);
  50 /* encode from byte stream - return number of written bytes if success */
  51 long snd_midi_event_encode(snd_midi_event_t *dev, unsigned char *buf, long count, snd_seq_event_t *ev);
  52 int snd_midi_event_encode_byte(snd_midi_event_t *dev, int c, snd_seq_event_t *ev);
  53 /* decode from event to bytes - return number of written bytes if success */
  54 long snd_midi_event_decode(snd_midi_event_t *dev, unsigned char *buf, long count, snd_seq_event_t *ev);
  55
  56 #endif /* __SOUND_SEQ_MIDI_EVENT_H */