77 lines
2.9 KiB
C
77 lines
2.9 KiB
C
/*-
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* Copyright (c) 1994 Søren Schmidt
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer
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* in this position and unchanged.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $Id: pcaudioio.h,v 1.4 1995/05/30 08:00:44 rgrimes Exp $
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*/
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#ifndef _PCAUDIOIO_H_
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#define _PCAUDIOIO_H_
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typedef struct audio_prinfo {
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unsigned sample_rate; /* samples per second */
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unsigned channels; /* # of channels (interleaved) */
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unsigned precision; /* sample size in bits */
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unsigned encoding; /* encoding method used */
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unsigned gain; /* volume level: 0 - 255 */
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unsigned port; /* input/output device */
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unsigned _fill1[4];
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unsigned samples; /* samples played */
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unsigned eof; /* ?!? */
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unsigned char pause; /* !=0 pause, ==0 continue */
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unsigned char error; /* !=0 if overflow/underflow */
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unsigned char waiting; /* !=0 if others wants access */
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unsigned char _fill2[3];
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unsigned char open; /* is device open */
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unsigned char active; /* !=0 if sound hardware is active */
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} audio_prinfo_t;
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typedef struct audio_info {
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audio_prinfo_t play;
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audio_prinfo_t record;
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unsigned monitor_gain;
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unsigned _fill[4];
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} audio_info_t;
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#define AUDIO_ENCODING_ULAW (1) /* u-law encoding */
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#define AUDIO_ENCODING_ALAW (2) /* A-law encoding */
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#define AUDIO_ENCODING_RAW (3) /* linear encoding */
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#define AUDIO_MIN_GAIN (0) /* minimum volume value */
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#define AUDIO_MAX_GAIN (255) /* maximum volume value */
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#define AUDIO_INITINFO(i) memset((void*)i, 0xff, sizeof(audio_info_t))
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#define AUDIO_GETINFO _IOR('A', 1, audio_info_t)
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#define AUDIO_SETINFO _IOWR('A', 2, audio_info_t)
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#define AUDIO_DRAIN _IO('A', 3)
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#define AUDIO_FLUSH _IO('A', 4)
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#endif /*!_PCAUDIOIO_H*/
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