/*
 * OSS compatible sequencer driver
 *
 * seq_oss_event.h - OSS event queue record
 *
 * Copyright (C) 1998,99 Takashi Iwai <iwai@ww.uni-erlangen.de>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#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) */
typedef struct evrec_short_t {
	unsigned char code;
	unsigned char parm1;
	unsigned char dev;
	unsigned char parm2;
} evrec_short_t;
	
/* short note events (4bytes) */
typedef struct evrec_note_t {
	unsigned char code;
	unsigned char chn;
	unsigned char note;
	unsigned char vel;
} evrec_note_t;
	
/* long timer events (8bytes) */
typedef struct evrec_timer_t {
	unsigned char code;
	unsigned char cmd;
	unsigned char dummy1, dummy2;
	unsigned int time;
} evrec_timer_t;

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

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

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

/* event record */
union evrec_t {
	evrec_short_t s;
	evrec_note_t n;
	evrec_long_t l;
	evrec_voice_t v;
	evrec_timer_t t;
	evrec_extended_t e;
	evrec_sysex_t 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_insert_queue(seq_oss_devinfo_t *dp, evrec_t *rec);
int snd_seq_oss_play_event(seq_oss_devinfo_t *dp, evrec_t *q, int atomic);
int snd_seq_oss_process_timer_event(seq_oss_timer_t *rec, evrec_t *ev);


#endif /* __SEQ_OSS_EVENT_H */
