bsd_audioio.h

早期freebsd实现

/*
 * Copyright (c) 1991, 1992, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This software was developed by the Computer Systems Engineering group
 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
 * contributed to Berkeley.
 *
 * All advertising materials mentioning features or use of this software
 * must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Lawrence Berkeley Laboratory.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)bsd_audioio.h	8.1 (Berkeley) 6/11/93
 *
 * from: $Header: bsd_audioio.h,v 1.5 92/11/21 20:46:46 van Exp $ (LBL)
 */

#ifndef _BSD_AUDIOIO_H_
#define _BSD_AUDIOIO_H_

/*
 * /dev/audio ioctls.  needs comments!
 */
#define AUDIO_MIN_GAIN (0)
#define AUDIO_MAX_GAIN (255)

#define AUDIO_ENCODING_ULAW (1)
#define AUDIO_ENCODING_ALAW (2)

struct audio_prinfo {
	u_int	sample_rate;
	u_int	channels;
	u_int	precision;
	u_int	encoding;
	u_int	gain;
	u_int	port;
	u_long	seek;		/* BSD extension */
	u_int	ispare[3];
	u_int	samples;
	u_int	eof;

	u_char	pause;
	u_char	error;
	u_char	waiting;
	u_char	cspare[3];
	u_char	open;
	u_char	active;

};

struct audio_info {
	struct	audio_prinfo play;
	struct	audio_prinfo record;
	u_int	monitor_gain;
	/* BSD extensions */
	u_int	blocksize;	/* input blocking threshold */
	u_int	hiwat;		/* output high water mark */
	u_int	lowat;		/* output low water mark */
	u_int	backlog;	/* samples of output backlog to gen. */
};
typedef struct audio_info audio_info_t;

#define AUDIO_INITINFO(p)\
	(void)memset((void *)(p), 0xff, sizeof(struct audio_info))

#if (defined(sun) || defined(ibm032)) && !defined(__GNUC__)
#define AUDIO_GETINFO	_IOR(A, 21, struct audio_info)
#define AUDIO_SETINFO	_IOWR(A, 22, struct audio_info)
#define AUDIO_DRAIN	_IO(A, 23)
#define AUDIO_FLUSH	_IO(A, 24)
#define AUDIO_WSEEK	_IOR(A, 25, u_long)
#define AUDIO_RERROR	_IOR(A, 26, int)
#define AUDIO_GETMAP	_IOR(A, 27, struct mapreg)
#define	AUDIO_SETMAP	_IOW(A, 28, struct mapreg)
#else
#define AUDIO_GETINFO	_IOR('A', 21, struct audio_info)
#define AUDIO_SETINFO	_IOWR('A', 22, struct audio_info)
#define AUDIO_DRAIN	_IO('A', 23)
#define AUDIO_FLUSH	_IO('A', 24)
#define AUDIO_WSEEK	_IOR('A', 25, u_long)
#define AUDIO_RERROR	_IOR('A', 26, int)
#define AUDIO_GETMAP	_IOR('A', 27, struct mapreg)
#define	AUDIO_SETMAP	_IOW('A', 28, struct mapreg)
#endif

#define AUDIO_SPEAKER   	1
#define AUDIO_HEADPHONE		2

/*
 * Low level interface.
 */
struct mapreg {
	u_short	mr_x[8];
	u_short	mr_r[8];
	u_short	mr_gx;
	u_short	mr_gr;
	u_short	mr_ger;
	u_short	mr_stgr;
	u_short	mr_ftgr;
	u_short	mr_atgr;
	u_char	mr_mmr1;
	u_char	mr_mmr2;
};

#endif /* _BSD_AUDIOIO_H_ */