mirror of https://gitee.com/openkylin/linux.git
40 lines
1.3 KiB
C
40 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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#ifndef __SOUND_SEQ_MIDI_EVENT_H
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#define __SOUND_SEQ_MIDI_EVENT_H
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/*
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* MIDI byte <-> sequencer event coder
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*
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* Copyright (C) 1998,99 Takashi Iwai <tiwai@suse.de>,
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* Jaroslav Kysela <perex@perex.cz>
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*/
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#include <sound/asequencer.h>
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#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 */
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int read; /* chars read */
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int type; /* current event type */
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unsigned char lastcmd; /* last command (for MIDI state handling) */
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unsigned char nostat; /* no state flag */
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int bufsize; /* allocated buffer size */
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unsigned char *buf; /* input buffer */
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spinlock_t lock;
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};
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int snd_midi_event_new(int bufsize, struct snd_midi_event **rdev);
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void snd_midi_event_free(struct snd_midi_event *dev);
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void snd_midi_event_reset_encode(struct snd_midi_event *dev);
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void snd_midi_event_reset_decode(struct snd_midi_event *dev);
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void snd_midi_event_no_status(struct snd_midi_event *dev, int on);
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bool snd_midi_event_encode_byte(struct snd_midi_event *dev, unsigned char c,
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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,
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struct snd_seq_event *ev);
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#endif /* __SOUND_SEQ_MIDI_EVENT_H */
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