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vt(4): Connect to teken's TP_SETBELLPD

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Add the glue needed to listen to TP_SETBELLPD which teken uses to
inform its client drivers about the results of parsing
\e[=<pitch>;<duration>B. It converts these to a Hz value for the
tone/pitch of the bell and a duration in ms. There's some loss of
precision because <pitch> in the escape seuquence is defined to be
(1193182 / pitch) Hz and <duration> is in 10ms units. Also note that
kbdcontrol also parses 'off' but then doesn't send the proper escape
sequence, leading me to wonder if that's another bug since teken
appears to parse that sequence properly and I've added code here to
treat that as the same as quiet or disabled.

In general, Hz from 100 to 2000 is good. Outside that range is possible,
but even at 100Hz the square wave is starting to sound bad and above
2000Hz the speaker may not respond.

Reviewed by:	mav
Differential Revision:	https://reviews.freebsd.org/D32620
This commit is contained in:
Warner Losh 2021-11-03 15:55:42 -06:00
parent 072d5b98c4
commit 2533eca1c2
2 changed files with 14 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
sys/dev/vt/vt.h
View file

@ -308,6 +308,8 @@ struct vt_window {
struct vt_mode vw_smode; /* switch mode */
struct callout vw_proc_dead_timer;
struct vt_window *vw_switch_to;
int vw_bell_pitch; /* (?) Bell pitch */
sbintime_t vw_bell_duration; /* (?) Bell duration */
};
#define VT_AUTO 0 /* switching is automatic */

13
sys/dev/vt/vt_core.c
View file

@ -257,6 +257,8 @@ static struct vt_window vt_conswindow = {
.vw_terminal = &vt_consterm,
.vw_kbdmode = K_XLATE,
.vw_grabbed = 0,
.vw_bell_pitch = VT_BELLPITCH,
.vw_bell_duration = VT_BELLDURATION,
};
struct terminal vt_consterm = {
.tm_class = &vt_termclass,
@ -1100,7 +1102,11 @@ vtterm_bell(struct terminal *tm)
if (vd->vd_flags & VDF_QUIET_BELL)
return;
sysbeep(VT_BELLPITCH, VT_BELLDURATION);
if (vw->vw_bell_pitch == 0 ||
vw->vw_bell_duration == 0)
return;
sysbeep(vw->vw_bell_pitch, vw->vw_bell_duration);
}
static void
@ -1177,6 +1183,11 @@ vtterm_param(struct terminal *tm, int cmd, unsigned int arg)
case TP_MOUSE:
vw->vw_mouse_level = arg;
break;
case TP_SETBELLPD:
vw->vw_bell_pitch = TP_SETBELLPD_PITCH(arg);
vw->vw_bell_duration =
TICKS_2_MSEC(TP_SETBELLPD_DURATION(arg)) * SBT_1MS;
break;
}
}