/* 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 */