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/*
* speaker.h -- interface definitions for speaker ioctl()
*
* v1.4 by Eric S. Raymond (esr@snark.thyrsus.com) Aug 1993
* modified for FreeBSD by Andrew A. Chernov <ache@astral.msk.su>
*
* $Id: speaker.h,v 1.2 1994/08/02 07:39:05 davidg Exp $
*/
#ifndef _MACHINE_SPEAKER_H_
#define _MACHINE_SPEAKER_H_
#include <sys/ioccom.h>
#define SPKRTONE _IOW('S', 1, tone_t) /* emit tone */
#define SPKRTUNE _IO('S', 2) /* emit tone sequence*/
typedef struct
{
int frequency; /* in hertz */
int duration; /* in 1/100ths of a second */
}
tone_t;
/*
* Strings written to the speaker device are interpreted as tunes and played;
* see the spkr(4) man page for details.
*/
#endif /* !_MACHINE_SPEAKER_H_ */
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