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Allow the audio device to be opened only while it's actually used.
This is necessary for uaudio devices, for instance to start aucat
before the device is plugged. Or to unplug a device whithout
having to restart aucat when another device is plugged.  This is
controlled with the new -a option.

Allow multiple audio devices to be used concurently, i.e.
multiple ``-f devname'' options to be used; -f options must follow
per-device options, which is what we do for other options.

/*	$OpenBSD: opt.h,v 1.8 2010/06/04 06:15:28 ratchov Exp $	*/
/*
 * Copyright (c) 2008 Alexandre Ratchov <alex@caoua.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
#ifndef OPT_H
#define OPT_H

#include <sys/queue.h>
#include "aparams.h"

struct dev;

struct opt {
	SLIST_ENTRY(opt) entry;
#define OPT_NAMEMAX 11
	char name[OPT_NAMEMAX + 1];
	int maxweight;		/* max dynamic range for clients */
	struct aparams wpar;	/* template for clients write params */
	struct aparams rpar;	/* template for clients read params */
	int mmc;		/* true if MMC control enabled */
	int join;		/* true if join/expand enabled */
#define MODE_PLAY	0x1	/* allowed to play */
#define MODE_REC	0x2	/* allowed to rec */
#define MODE_MIDIIN	0x4	/* allowed to read midi */
#define MODE_MIDIOUT	0x8	/* allowed to write midi */
#define MODE_MON	0x10	/* allowed to monitor */
#define MODE_LOOP	0x20	/* deviceless mode */
#define MODE_RECMASK	(MODE_REC | MODE_MON)
#define MODE_AUDIOMASK	(MODE_REC | MODE_MON | MODE_PLAY)
#define MODE_MIDIMASK	(MODE_MIDIIN | MODE_MIDIOUT)
	unsigned mode;		/* bitmap of above */
	struct dev *dev;	/* device to which we're attached */
};

SLIST_HEAD(optlist,opt);

void opt_new(char *, struct dev *, struct aparams *, struct aparams *,
    int, int, int, unsigned);
struct opt *opt_byname(char *);

#endif /* !defined(OPT_H) */