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28 lines
702 B
C
28 lines
702 B
C
/*
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* speaker.h -- interface definitions for speaker ioctl()
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*
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* v1.4 by Eric S. Raymond (esr@snark.thyrsus.com) Aug 1993
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* modified for FreeBSD by Andrew A. Chernov <ache@astral.msk.su>
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*/
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#ifndef _DEV_SPEAKER_SPEAKER_H_
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#define _DEV_SPEAKER_SPEAKER_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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typedef struct
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{
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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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/*
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* Strings written to the speaker device are interpreted as tunes and played;
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* see the spkr(4) man page for details.
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*/
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#endif /* !_DEV_SPEAKER_SPEAKER_H_ */
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