| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 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 */ |