1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 #ifndef __SOUND_SEQ_MIDI_EVENT_H 3 #define __SOUND_SEQ_MIDI_EVENT_H 4 5 /* 6 * MIDI byte <-> sequencer event coder 7 * 8 * Copyright (C) 1998,99 Takashi Iwai <tiwai@suse.de>, 9 * Jaroslav Kysela <perex@perex.cz> 10 */ 11 12 #include <sound/asequencer.h> 13 14 #define MAX_MIDI_EVENT_BUF 256 15 16 /* midi status */ 17 struct snd_midi_event { 18 int qlen; /* queue length */ 19 int read; /* chars read */ 20 int type; /* current event type */ 21 unsigned char lastcmd; /* last command (for MIDI state handling) */ 22 unsigned char nostat; /* no state flag */ 23 int bufsize; /* allocated buffer size */ 24 unsigned char *buf; /* input buffer */ 25 spinlock_t lock; 26 }; 27 28 int snd_midi_event_new(int bufsize, struct snd_midi_event **rdev); 29 void snd_midi_event_free(struct snd_midi_event *dev); 30 void snd_midi_event_reset_encode(struct snd_midi_event *dev); 31 void snd_midi_event_reset_decode(struct snd_midi_event *dev); 32 void snd_midi_event_no_status(struct snd_midi_event *dev, int on); 33 bool snd_midi_event_encode_byte(struct snd_midi_event *dev, unsigned char c, 34 struct snd_seq_event *ev); 35 /* decode from event to bytes - return number of written bytes if success */ 36 long snd_midi_event_decode(struct snd_midi_event *dev, unsigned char *buf, long count, 37 struct snd_seq_event *ev); 38 39 #endif /* __SOUND_SEQ_MIDI_EVENT_H */ 40