1/*-
2 * Copyright (c) 1994 S��ren Schmidt
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer
10 *    in this position and unchanged.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 *    derived from this software without specific prior written permission
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * $FreeBSD$
29 */
30
31#ifndef	_MACHINE_PCAUDIOIO_H_
32#define	_MACHINE_PCAUDIOIO_H_
33
34#include <sys/ioccom.h>
35
36typedef struct audio_prinfo {
37	unsigned	sample_rate;	/* samples per second */
38	unsigned	channels;	/* # of channels (interleaved) */
39	unsigned	precision;	/* sample size in bits */
40	unsigned	encoding;	/* encoding method used */
41
42	unsigned	gain;		/* volume level: 0 - 255 */
43	unsigned	port;		/* input/output device */
44	unsigned	_fill1[4];
45
46	unsigned	samples;	/* samples played */
47	unsigned	eof;		/* ?!? */
48	unsigned char	pause;		/* !=0 pause, ==0 continue */
49	unsigned char	error;		/* !=0 if overflow/underflow */
50	unsigned char	waiting;	/* !=0 if others wants access */
51	unsigned char	_fill2[3];
52
53	unsigned char	open; 		/* is device open */
54	unsigned char	active;		/* !=0 if sound hardware is active */
55} audio_prinfo_t;
56
57typedef struct audio_info {
58	audio_prinfo_t	play;
59	audio_prinfo_t	record;
60	unsigned	monitor_gain;
61	unsigned	_fill[4];
62} audio_info_t;
63
64#define	AUDIO_ENCODING_ULAW	(1)	/* u-law encoding */
65#define	AUDIO_ENCODING_ALAW	(2)	/* A-law encoding */
66#define	AUDIO_ENCODING_RAW	(3)	/* linear encoding */
67
68#define	AUDIO_MIN_GAIN		(0)	/* minimum volume value */
69#define	AUDIO_MAX_GAIN		(255)	/* maximum volume value */
70
71#define	AUDIO_INITINFO(i)	memset((void*)i, 0xff, sizeof(audio_info_t))
72
73#define	AUDIO_GETINFO		_IOR('A', 1, audio_info_t)
74#define	AUDIO_SETINFO		_IOWR('A', 2, audio_info_t)
75#define	AUDIO_DRAIN		_IO('A', 3)
76#define	AUDIO_FLUSH		_IO('A', 4)
77
78/* compatibility to /dev/audio */
79#define AUDIO_COMPAT_DRAIN	_IO('P', 1)
80#define AUDIO_COMPAT_FLUSH	_IO('P', 0)
81
82#endif /* !_MACHINE_PCAUDIOIO_H_ */
83