/* 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. * */ //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_info_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 \ */