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/* vi: set sw=4 ts=4: */
/*
* beep implementation for busybox
*
* Copyright (C) 2009 Bernhard Reutner-Fischer
*
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
//config:config BEEP
//config: bool "beep (2.4 kb)"
//config: default y
//config: help
//config: The beep applets beeps in a given freq/Hz.
//config:
//config:config FEATURE_BEEP_FREQ
//config: int "default frequency"
//config: range 20 50000 # allowing 0 here breaks the build
//config: default 4000
//config: depends on BEEP
//config: help
//config: Frequency for default beep.
//config:
//config:config FEATURE_BEEP_LENGTH_MS
//config: int "default length"
//config: range 0 2147483647
//config: default 30
//config: depends on BEEP
//config: help
//config: Length in ms for default beep.
//applet:IF_BEEP(APPLET(beep, BB_DIR_USR_BIN, BB_SUID_DROP))
//kbuild:lib-$(CONFIG_BEEP) += beep.o
//usage:#define beep_trivial_usage
//usage: "-f FREQ -l LEN -d DELAY -r COUNT -n"
//usage:#define beep_full_usage "\n\n"
//usage: " -f Frequency in Hz"
//usage: "\n -l Length in ms"
//usage: "\n -d Delay in ms"
//usage: "\n -r Repetitions"
//usage: "\n -n Start new tone"
#include "libbb.h"
#include <linux/kd.h>
#ifndef CLOCK_TICK_RATE
# define CLOCK_TICK_RATE 1193180
#endif
/* defaults */
#ifndef CONFIG_FEATURE_BEEP_FREQ
# define FREQ (4000)
#else
# define FREQ (CONFIG_FEATURE_BEEP_FREQ)
#endif
#ifndef CONFIG_FEATURE_BEEP_LENGTH_MS
# define LENGTH (30)
#else
# define LENGTH (CONFIG_FEATURE_BEEP_LENGTH_MS)
#endif
#define DELAY (0)
#define REPETITIONS (1)
int beep_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int beep_main(int argc, char **argv)
{
int speaker = get_console_fd_or_die();
unsigned tickrate_div_freq = tickrate_div_freq; /* for compiler */
unsigned length = length;
unsigned delay = delay;
unsigned rep = rep;
int c;
c = 'n';
while (c != -1) {
if (c == 'n') {
tickrate_div_freq = CLOCK_TICK_RATE / FREQ;
length = LENGTH;
delay = DELAY;
rep = REPETITIONS;
}
c = getopt(argc, argv, "f:l:d:r:n");
/* TODO: -s, -c:
* pipe stdin to stdout, but also beep after each line (-s) or char (-c)
*/
switch (c) {
case 'f':
/* TODO: what "-f 0" should do? */
tickrate_div_freq = (unsigned)CLOCK_TICK_RATE / xatou(optarg);
continue;
case 'l':
length = xatou(optarg);
continue;
case 'd':
/* TODO:
* -d N, -D N
* specify a delay of N milliseconds between repetitions.
* -d specifies that this delay should only occur between beeps,
* that is, it should not occur after the last repetition.
* -D indicates that the delay should occur after every repetition
*/
delay = xatou(optarg);
continue;
case 'r':
rep = xatou(optarg);
continue;
case 'n':
case -1:
break;
default:
bb_show_usage();
}
while (rep) {
//bb_error_msg("rep[%d] freq=%d, length=%d, delay=%d", rep, freq, length, delay);
xioctl(speaker, KIOCSOUND, (void*)(uintptr_t)tickrate_div_freq);
usleep(1000 * length);
ioctl(speaker, KIOCSOUND, (void*)0);
if (--rep)
usleep(1000 * delay);
}
}
if (ENABLE_FEATURE_CLEAN_UP)
close(speaker);
return EXIT_SUCCESS;
}
/*
* so, e.g. Beethoven's 9th symphony "Ode an die Freude" would be
* something like:
a=$((220*3))
b=$((247*3))
c=$((262*3))
d=$((294*3))
e=$((329*3))
f=$((349*3))
g=$((392*3))
#./beep -f$d -l200 -r2 -n -f$e -l100 -d 10 -n -f$c -l400 -f$g -l200
./beep -f$e -l200 -r2 \
-n -d 100 -f$f -l200 \
-n -f$g -l200 -r2 \
-n -f$f -l200 \
-n -f$e -l200 \
-n -f$d -l200 \
-n -f$c -l200 -r2 \
-n -f$d -l200 \
-n -f$e -l200 \
-n -f$e -l400 \
-n -f$d -l100 \
-n -f$d -l200 \
*/
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