18c2ecf20Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0-or-later */ 28c2ecf20Sopenharmony_ci#ifndef __SOUND_SEQ_MIDI_EVENT_H 38c2ecf20Sopenharmony_ci#define __SOUND_SEQ_MIDI_EVENT_H 48c2ecf20Sopenharmony_ci 58c2ecf20Sopenharmony_ci/* 68c2ecf20Sopenharmony_ci * MIDI byte <-> sequencer event coder 78c2ecf20Sopenharmony_ci * 88c2ecf20Sopenharmony_ci * Copyright (C) 1998,99 Takashi Iwai <tiwai@suse.de>, 98c2ecf20Sopenharmony_ci * Jaroslav Kysela <perex@perex.cz> 108c2ecf20Sopenharmony_ci */ 118c2ecf20Sopenharmony_ci 128c2ecf20Sopenharmony_ci#include <sound/asequencer.h> 138c2ecf20Sopenharmony_ci 148c2ecf20Sopenharmony_ci#define MAX_MIDI_EVENT_BUF 256 158c2ecf20Sopenharmony_ci 168c2ecf20Sopenharmony_ci/* midi status */ 178c2ecf20Sopenharmony_cistruct snd_midi_event { 188c2ecf20Sopenharmony_ci int qlen; /* queue length */ 198c2ecf20Sopenharmony_ci int read; /* chars read */ 208c2ecf20Sopenharmony_ci int type; /* current event type */ 218c2ecf20Sopenharmony_ci unsigned char lastcmd; /* last command (for MIDI state handling) */ 228c2ecf20Sopenharmony_ci unsigned char nostat; /* no state flag */ 238c2ecf20Sopenharmony_ci int bufsize; /* allocated buffer size */ 248c2ecf20Sopenharmony_ci unsigned char *buf; /* input buffer */ 258c2ecf20Sopenharmony_ci spinlock_t lock; 268c2ecf20Sopenharmony_ci}; 278c2ecf20Sopenharmony_ci 288c2ecf20Sopenharmony_ciint snd_midi_event_new(int bufsize, struct snd_midi_event **rdev); 298c2ecf20Sopenharmony_civoid snd_midi_event_free(struct snd_midi_event *dev); 308c2ecf20Sopenharmony_civoid snd_midi_event_reset_encode(struct snd_midi_event *dev); 318c2ecf20Sopenharmony_civoid snd_midi_event_reset_decode(struct snd_midi_event *dev); 328c2ecf20Sopenharmony_civoid snd_midi_event_no_status(struct snd_midi_event *dev, int on); 338c2ecf20Sopenharmony_cibool snd_midi_event_encode_byte(struct snd_midi_event *dev, unsigned char c, 348c2ecf20Sopenharmony_ci struct snd_seq_event *ev); 358c2ecf20Sopenharmony_ci/* decode from event to bytes - return number of written bytes if success */ 368c2ecf20Sopenharmony_cilong snd_midi_event_decode(struct snd_midi_event *dev, unsigned char *buf, long count, 378c2ecf20Sopenharmony_ci struct snd_seq_event *ev); 388c2ecf20Sopenharmony_ci 398c2ecf20Sopenharmony_ci#endif /* __SOUND_SEQ_MIDI_EVENT_H */ 40