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/*-
* Copyright (c) 1994 Søren Schmidt
* All rights reserved.
*
* 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
* in this position and unchanged.
* 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. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*
* $FreeBSD$
*/
#ifndef _MACHINE_PCAUDIOIO_H_
#define _MACHINE_PCAUDIOIO_H_
#include <sys/ioccom.h>
typedef struct audio_prinfo {
unsigned sample_rate; /* samples per second */
unsigned channels; /* # of channels (interleaved) */
unsigned precision; /* sample size in bits */
unsigned encoding; /* encoding method used */
unsigned gain; /* volume level: 0 - 255 */
unsigned port; /* input/output device */
unsigned _fill1[4];
unsigned samples; /* samples played */
unsigned eof; /* ?!? */
unsigned char pause; /* !=0 pause, ==0 continue */
unsigned char error; /* !=0 if overflow/underflow */
unsigned char waiting; /* !=0 if others wants access */
unsigned char _fill2[3];
unsigned char open; /* is device open */
unsigned char active; /* !=0 if sound hardware is active */
} audio_prinfo_t;
typedef struct audio_info {
audio_prinfo_t play;
audio_prinfo_t record;
unsigned monitor_gain;
unsigned _fill[4];
} audio_info_t;
#define AUDIO_ENCODING_ULAW (1) /* u-law encoding */
#define AUDIO_ENCODING_ALAW (2) /* A-law encoding */
#define AUDIO_ENCODING_RAW (3) /* linear encoding */
#define AUDIO_MIN_GAIN (0) /* minimum volume value */
#define AUDIO_MAX_GAIN (255) /* maximum volume value */
#define AUDIO_INITINFO(i) memset((void*)i, 0xff, sizeof(audio_info_t))
#define AUDIO_GETINFO _IOR('A', 1, audio_info_t)
#define AUDIO_SETINFO _IOWR('A', 2, audio_info_t)
#define AUDIO_DRAIN _IO('A', 3)
#define AUDIO_FLUSH _IO('A', 4)
/* compatibility to /dev/audio */
#define AUDIO_COMPAT_DRAIN _IO('P', 1)
#define AUDIO_COMPAT_FLUSH _IO('P', 0)
#endif /* !_MACHINE_PCAUDIOIO_H_ */
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