1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0-or-later */ 2*4882a593Smuzhiyun #ifndef __SOUND_SEQ_MIDI_EVENT_H 3*4882a593Smuzhiyun #define __SOUND_SEQ_MIDI_EVENT_H 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun /* 6*4882a593Smuzhiyun * MIDI byte <-> sequencer event coder 7*4882a593Smuzhiyun * 8*4882a593Smuzhiyun * Copyright (C) 1998,99 Takashi Iwai <tiwai@suse.de>, 9*4882a593Smuzhiyun * Jaroslav Kysela <perex@perex.cz> 10*4882a593Smuzhiyun */ 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun #include <sound/asequencer.h> 13*4882a593Smuzhiyun 14*4882a593Smuzhiyun #define MAX_MIDI_EVENT_BUF 256 15*4882a593Smuzhiyun 16*4882a593Smuzhiyun /* midi status */ 17*4882a593Smuzhiyun struct snd_midi_event { 18*4882a593Smuzhiyun int qlen; /* queue length */ 19*4882a593Smuzhiyun int read; /* chars read */ 20*4882a593Smuzhiyun int type; /* current event type */ 21*4882a593Smuzhiyun unsigned char lastcmd; /* last command (for MIDI state handling) */ 22*4882a593Smuzhiyun unsigned char nostat; /* no state flag */ 23*4882a593Smuzhiyun int bufsize; /* allocated buffer size */ 24*4882a593Smuzhiyun unsigned char *buf; /* input buffer */ 25*4882a593Smuzhiyun spinlock_t lock; 26*4882a593Smuzhiyun }; 27*4882a593Smuzhiyun 28*4882a593Smuzhiyun int snd_midi_event_new(int bufsize, struct snd_midi_event **rdev); 29*4882a593Smuzhiyun void snd_midi_event_free(struct snd_midi_event *dev); 30*4882a593Smuzhiyun void snd_midi_event_reset_encode(struct snd_midi_event *dev); 31*4882a593Smuzhiyun void snd_midi_event_reset_decode(struct snd_midi_event *dev); 32*4882a593Smuzhiyun void snd_midi_event_no_status(struct snd_midi_event *dev, int on); 33*4882a593Smuzhiyun bool snd_midi_event_encode_byte(struct snd_midi_event *dev, unsigned char c, 34*4882a593Smuzhiyun struct snd_seq_event *ev); 35*4882a593Smuzhiyun /* decode from event to bytes - return number of written bytes if success */ 36*4882a593Smuzhiyun long snd_midi_event_decode(struct snd_midi_event *dev, unsigned char *buf, long count, 37*4882a593Smuzhiyun struct snd_seq_event *ev); 38*4882a593Smuzhiyun 39*4882a593Smuzhiyun #endif /* __SOUND_SEQ_MIDI_EVENT_H */ 40