23 lines
577 B
C
23 lines
577 B
C
/* $NetBSD: spkrio.h,v 1.3 2017/06/11 03:33:48 nat Exp $ */
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/*
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* spkrio.h -- interface definitions for speaker ioctl()
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*/
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#ifndef _DEV_SPKRIO_H_
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#define _DEV_SPKRIO_H_
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#include <sys/ioccom.h>
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#define SPKRTONE _IOW('S', 1, tone_t) /* emit tone */
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#define SPKRTUNE _IO('S', 2) /* emit tone sequence */
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#define SPKRGETVOL _IOR('S', 3, u_int) /* get volume */
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#define SPKRSETVOL _IOW('S', 4, u_int) /* set volume */
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typedef struct {
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int frequency; /* in hertz */
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int duration; /* in 1/100ths of a second */
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} tone_t;
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#endif
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