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if aucat is resumed (after suspend), kernel buffers are empty, thus write()
syscall succedes and consumes aucat buffers until kernel buffers are full.
If aucat buffers are smaller than kernel ones, they will underrun, and aucat
will terminate, since underruns are not handled yet.

This changes is an improvement until SIGCONT handler is implemented. The
correct approach is to add a handler for SIGCONT to: call dev_stop(), reset
all buffers, bring play and record in sync, fill play buffers and call
dev_start().

ok jakemsr

/*	$OpenBSD: conf.h,v 1.2 2008/05/28 07:36:23 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 ACONF_H
#define ACONF_H

/*
 * debug trace levels:
 *
 * 0 - traces are off
 * 1 - init, free, stuff that's done only once
 * 2 - rare real-time events: eof / hup, etc...
 * 3 - poll(), block / unblock state changes
 * 4 - read()/write()
 */
#ifdef DEBUG

/* defined in main.c */
void debug_printf(int, char *, char *, ...);
extern int debug_level;

#define DPRINTF(...) DPRINTFN(1, __VA_ARGS__)
#define DPRINTFN(n, ...)					\
	do {							\
		if (debug_level >= (n))				\
			fprintf(stderr, __VA_ARGS__);		\
	} while(0)
#else
#define DPRINTF(...) do {} while(0)
#define DPRINTFN(n, ...) do {} while(0)
#endif


#define MIDI_MAXCTL		127
#define MIDI_TO_ADATA(m)	((ADATA_UNIT * (m) + 64) / 127)

#define DEFAULT_NFR	0x400		/* buf size in frames */
#define DEFAULT_NBLK	0x2		/* blocks per buffer */
#define DEFAULT_DEVICE	"/dev/audio"	/* defaul device */

#endif /* !defined(CONF_H) */