sound/core/seq/oss/seq_oss_event.h

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * OSS compatible sequencer driver
 *
 * seq_oss_event.h - OSS event queue record
 *
 * Copyright (C) 1998,99 Takashi Iwai <tiwai@suse.de>
 */

#ifndef __SEQ_OSS_EVENT_H
#define __SEQ_OSS_EVENT_H

#include "seq_oss_device.h"

#define SHORT_EVENT_SIZE	4
#define LONG_EVENT_SIZE		8

/* short event (4bytes) */
struct evrec_short {
	unsigned char code;
	unsigned char parm1;
	unsigned char dev;
	unsigned char parm2;
};
	
/* short note events (4bytes) */
struct evrec_note {
	unsigned char code;
	unsigned char chn;
	unsigned char note;
	unsigned char vel;
};
	
/* long timer events (8bytes) */
struct evrec_timer {
	unsigned char code;
	unsigned char cmd;
	unsigned char dummy1, dummy2;
	unsigned int time;
};

/* long extended events (8bytes) */
struct evrec_extended {
	unsigned char code;
	unsigned char cmd;
	unsigned char dev;
	unsigned char chn;
	unsigned char p1, p2, p3, p4;
};

/* long channel events (8bytes) */
struct evrec_long {
	unsigned char code;
	unsigned char dev;
	unsigned char cmd;
	unsigned char chn;
	unsigned char p1, p2;
	unsigned short val;
};
	
/* channel voice events (8bytes) */
struct evrec_voice {
	unsigned char code;
	unsigned char dev;
	unsigned char cmd;
	unsigned char chn;
	unsigned char note, parm;
	unsigned short dummy;
};

/* sysex events (8bytes) */
struct evrec_sysex {
	unsigned char code;
	unsigned char dev;
	unsigned char buf[6];
};

/* event record */
union evrec {
	struct evrec_short s;
	struct evrec_note n;
	struct evrec_long l;
	struct evrec_voice v;
	struct evrec_timer t;
	struct evrec_extended e;
	struct evrec_sysex x;
	unsigned int echo;
	unsigned char c[LONG_EVENT_SIZE];
};

#define ev_is_long(ev) ((ev)->s.code >= 128)
#define ev_length(ev) ((ev)->s.code >= 128 ? LONG_EVENT_SIZE : SHORT_EVENT_SIZE)

int snd_seq_oss_process_event(struct seq_oss_devinfo *dp, union evrec *q, struct snd_seq_event *ev);
int snd_seq_oss_process_timer_event(struct seq_oss_timer *rec, union evrec *q);
int snd_seq_oss_event_input(struct snd_seq_event *ev, int direct, void *private_data, int atomic, int hop);


#endif /* __SEQ_OSS_EVENT_H */