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include/sound/seq_midi_event.h 2.17 KB
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  #ifndef __SOUND_SEQ_MIDI_EVENT_H
  #define __SOUND_SEQ_MIDI_EVENT_H
  
  /*
   *  MIDI byte <-> sequencer event coder
   *
   *  Copyright (C) 1998,99 Takashi Iwai <tiwai@suse.de>,
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   *                        Jaroslav Kysela <perex@perex.cz>
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   *
   *   This program is free software; you can redistribute it and/or modify
   *   it under the terms of the GNU General Public License as published by
   *   the Free Software Foundation; either version 2 of the License, or
   *   (at your option) any later version.
   *
   *   This program is distributed in the hope that it will be useful,
   *   but WITHOUT ANY WARRANTY; without even the implied warranty of
   *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   *   GNU General Public License for more details.
   *
   *   You should have received a copy of the GNU General Public License
   *   along with this program; if not, write to the Free Software
   *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
   */
  
  #include "asequencer.h"
  
  #define MAX_MIDI_EVENT_BUF	256
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  /* midi status */
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  struct snd_midi_event {
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  	int qlen;		/* queue length */
  	int read;		/* chars read */
  	int type;		/* current event type */
  	unsigned char lastcmd;	/* last command (for MIDI state handling) */
  	unsigned char nostat;	/* no state flag */
  	int bufsize;		/* allocated buffer size */
  	unsigned char *buf;	/* input buffer */
  	spinlock_t lock;
  };
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  int snd_midi_event_new(int bufsize, struct snd_midi_event **rdev);
  void snd_midi_event_free(struct snd_midi_event *dev);
  void snd_midi_event_reset_encode(struct snd_midi_event *dev);
  void snd_midi_event_reset_decode(struct snd_midi_event *dev);
  void snd_midi_event_no_status(struct snd_midi_event *dev, int on);
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  /* encode from byte stream - return number of written bytes if success */
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  long snd_midi_event_encode(struct snd_midi_event *dev, unsigned char *buf, long count,
  			   struct snd_seq_event *ev);
  int snd_midi_event_encode_byte(struct snd_midi_event *dev, int c, struct snd_seq_event *ev);
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  /* decode from event to bytes - return number of written bytes if success */
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  long snd_midi_event_decode(struct snd_midi_event *dev, unsigned char *buf, long count,
  			   struct snd_seq_event *ev);
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  #endif /* __SOUND_SEQ_MIDI_EVENT_H */