speaker.h

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    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 _MACHINE_SPEAKER_H_
   11 #define _MACHINE_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 }
   23 tone_t;
   24 
   25 /*
   26  * Strings written to the speaker device are interpreted as tunes and played;
   27  * see the spkr(4) man page for details.
   28  */
   29 
   30 #endif /* !_MACHINE_SPEAKER_H_ */

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FreeBSD/Linux Kernel Cross Reference sys/i386/include/speaker.h

FreeBSD/Linux Kernel Cross Reference
sys/i386/include/speaker.h