1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * beep implementation for busybox
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4 | *
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5 | * Copyright (C) 2009 Bernhard Reutner-Fischer
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6 | *
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7 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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8 | *
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9 | */
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10 |
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11 | //usage:#define beep_trivial_usage
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12 | //usage: "-f FREQ -l LEN -d DELAY -r COUNT -n"
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13 | //usage:#define beep_full_usage "\n\n"
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14 | //usage: " -f Frequency in Hz"
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15 | //usage: "\n -l Length in ms"
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16 | //usage: "\n -d Delay in ms"
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17 | //usage: "\n -r Repetitions"
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18 | //usage: "\n -n Start new tone"
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19 |
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20 | #include "libbb.h"
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21 |
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22 | #include <linux/kd.h>
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23 | #ifndef CLOCK_TICK_RATE
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24 | # define CLOCK_TICK_RATE 1193180
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25 | #endif
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26 |
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27 | /* defaults */
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28 | #ifndef CONFIG_FEATURE_BEEP_FREQ
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29 | # define FREQ (4000)
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30 | #else
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31 | # define FREQ (CONFIG_FEATURE_BEEP_FREQ)
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32 | #endif
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33 | #ifndef CONFIG_FEATURE_BEEP_LENGTH_MS
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34 | # define LENGTH (30)
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35 | #else
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36 | # define LENGTH (CONFIG_FEATURE_BEEP_LENGTH_MS)
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37 | #endif
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38 | #define DELAY (0)
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39 | #define REPETITIONS (1)
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40 |
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41 | int beep_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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42 | int beep_main(int argc, char **argv)
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43 | {
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44 | int speaker = get_console_fd_or_die();
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45 | unsigned tickrate_div_freq = tickrate_div_freq; /* for compiler */
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46 | unsigned length = length;
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47 | unsigned delay = delay;
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48 | unsigned rep = rep;
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49 | int c;
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50 |
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51 | c = 'n';
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52 | while (c != -1) {
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53 | if (c == 'n') {
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54 | tickrate_div_freq = CLOCK_TICK_RATE / FREQ;
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55 | length = LENGTH;
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56 | delay = DELAY;
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57 | rep = REPETITIONS;
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58 | }
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59 | c = getopt(argc, argv, "f:l:d:r:n");
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60 | /* TODO: -s, -c:
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61 | * pipe stdin to stdout, but also beep after each line (-s) or char (-c)
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62 | */
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63 | switch (c) {
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64 | case 'f':
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65 | /* TODO: what "-f 0" should do? */
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66 | tickrate_div_freq = (unsigned)CLOCK_TICK_RATE / xatou(optarg);
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67 | continue;
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68 | case 'l':
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69 | length = xatou(optarg);
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70 | continue;
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71 | case 'd':
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72 | /* TODO:
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73 | * -d N, -D N
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74 | * specify a delay of N milliseconds between repetitions.
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75 | * -d specifies that this delay should only occur between beeps,
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76 | * that is, it should not occur after the last repetition.
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77 | * -D indicates that the delay should occur after every repetition
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78 | */
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79 | delay = xatou(optarg);
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80 | continue;
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81 | case 'r':
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82 | rep = xatou(optarg);
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83 | continue;
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84 | case 'n':
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85 | case -1:
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86 | break;
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87 | default:
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88 | bb_show_usage();
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89 | }
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90 | while (rep) {
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91 | //bb_info_msg("rep[%d] freq=%d, length=%d, delay=%d", rep, freq, length, delay);
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92 | xioctl(speaker, KIOCSOUND, (void*)(uintptr_t)tickrate_div_freq);
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93 | usleep(1000 * length);
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94 | ioctl(speaker, KIOCSOUND, (void*)0);
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95 | if (--rep)
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96 | usleep(1000 * delay);
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97 | }
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98 | }
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99 |
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100 | if (ENABLE_FEATURE_CLEAN_UP)
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101 | close(speaker);
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102 | return EXIT_SUCCESS;
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103 | }
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104 | /*
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105 | * so, e.g. Beethoven's 9th symphony "Ode an die Freude" would be
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106 | * something like:
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107 | a=$((220*3))
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108 | b=$((247*3))
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109 | c=$((262*3))
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110 | d=$((294*3))
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111 | e=$((329*3))
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112 | f=$((349*3))
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113 | g=$((392*3))
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114 | #./beep -f$d -l200 -r2 -n -f$e -l100 -d 10 -n -f$c -l400 -f$g -l200
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115 | ./beep -f$e -l200 -r2 \
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116 | -n -d 100 -f$f -l200 \
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117 | -n -f$g -l200 -r2 \
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118 | -n -f$f -l200 \
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119 | -n -f$e -l200 \
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120 | -n -f$d -l200 \
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121 | -n -f$c -l200 -r2 \
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122 | -n -f$d -l200 \
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123 | -n -f$e -l200 \
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124 | -n -f$e -l400 \
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125 | -n -f$d -l100 \
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126 | -n -f$d -l200 \
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127 | */
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