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