113 lines
4.0 KiB
C
113 lines
4.0 KiB
C
/*
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* Copyright (c) 1991-1993 Regents of the University of California.
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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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* 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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the Computer Systems
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* Engineering Group at Lawrence Berkeley Laboratory.
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* 4. Neither the name of the University nor of the Laboratory may be used
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* to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#ifndef _BSD_AUDIOIO_H_
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#define _BSD_AUDIOIO_H_
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/*
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* Audio device
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*/
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struct audio_prinfo {
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u_int sample_rate;
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u_int channels;
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u_int precision;
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u_int encoding;
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u_int gain;
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u_int port;
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u_long seek; /* BSD extension */
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u_int ispare[3];
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/* Current state of device: */
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u_int samples; /* number of samples */
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u_int eof; /* End Of File (zero-size writes) counter */
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u_char pause; /* non-zero if paused, zero to resume */
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u_char error; /* non-zero if underflow/overflow ocurred */
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u_char waiting; /* non-zero if another process hangs in open */
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u_char cspare[3];
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u_char open; /* non-zero if currently open */
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u_char active; /* non-zero if I/O is currently active */
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};
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typedef struct audio_prinfo audio_prinfo_t;
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struct audio_info {
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struct audio_prinfo play; /* Info for play (output) side */
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struct audio_prinfo record; /* Info for record (input) side */
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u_int monitor_gain;
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/* BSD extensions */
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u_int blocksize; /* input blocking threshold */
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u_int hiwat; /* output high water mark */
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u_int lowat; /* output low water mark */
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u_int backlog; /* samples of output backlog to gen. */
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u_int mode;
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#define AUMODE_PLAY 0
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#define AUMODE_RECORD 1
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#define AUMODE_PLAY_ALL 0x04 /* play all samples--no real-time correction */
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};
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typedef struct audio_info audio_info_t;
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#ifdef _KERNEL
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#define AUDIO_INITINFO(p)\
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{ register int n = sizeof(struct audio_info); \
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register u_char *q = (u_char *) p; \
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while (n-- > 0) *q++ = 0xff; }
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#else
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#define AUDIO_INITINFO(p)\
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(void)memset((void *)(p), 0xff, sizeof(struct audio_info))
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#endif
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/*
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* /dev/audio ioctls. needs comments!
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*/
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#define AUDIO_MIN_GAIN (0)
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#define AUDIO_MAX_GAIN (255)
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#define AUDIO_ENCODING_ULAW (1)
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#define AUDIO_ENCODING_ALAW (2)
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#define AUDIO_ENCODING_LINEAR (3)
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#define AUDIO_ENCODING_ADPCM (4)
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#define AUDIO_GETINFO _IOR('A', 21, struct audio_info)
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#define AUDIO_SETINFO _IOWR('A', 22, struct audio_info)
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#define AUDIO_DRAIN _IO('A', 23)
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#define AUDIO_FLUSH _IO('A', 24)
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#define AUDIO_WSEEK _IOR('A', 25, u_long)
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#define AUDIO_RERROR _IOR('A', 26, int)
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#define AUDIO_GETMAP _IOR('A', 27, struct mapreg)
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#define AUDIO_SETMAP _IOW('A', 28, struct mapreg)
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#define AUDIO_SPEAKER 1
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#define AUDIO_HEADPHONE 2
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#endif /* _BSD_AUDIOIO_H_ */
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