xref: /freebsd/sys/dev/speaker/speaker.h (revision 0957b409)
1 /*
2  * speaker.h -- interface definitions for speaker ioctl()
3  *
4  * v1.4 by Eric S. Raymond (esr@snark.thyrsus.com) Aug 1993
5  *      modified for FreeBSD by Andrew A. Chernov <ache@astral.msk.su>
6  *
7  * $FreeBSD$
8  */
9 
10 #ifndef	_DEV_SPEAKER_SPEAKER_H_
11 #define	_DEV_SPEAKER_SPEAKER_H_
12 
13 #include <sys/ioccom.h>
14 
15 #define SPKRTONE        _IOW('S', 1, tone_t)    /* emit tone */
16 #define SPKRTUNE        _IO('S', 2)             /* emit tone sequence*/
17 
18 typedef struct
19 {
20     int	frequency;	/* in hertz */
21     int duration;	/* in 1/100ths of a second */
22 } tone_t;
23 
24 /*
25  * Strings written to the speaker device are interpreted as tunes and played;
26  * see the spkr(4) man page for details.
27  */
28 
29 #endif /* !_DEV_SPEAKER_SPEAKER_H_ */
30