blob: 910e03e1b4dfbf638d71f549b035f5d6c7747fc6
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * beep implementation for busybox |
4 | * |
5 | * Copyright (C) 2009 Bernhard Reutner-Fischer |
6 | * |
7 | * Licensed under GPLv2 or later, see file LICENSE in this source tree. |
8 | * |
9 | */ |
10 | |
11 | //usage:#define beep_trivial_usage |
12 | //usage: "-f FREQ -l LEN -d DELAY -r COUNT -n" |
13 | //usage:#define beep_full_usage "\n\n" |
14 | //usage: " -f Frequency in Hz" |
15 | //usage: "\n -l Length in ms" |
16 | //usage: "\n -d Delay in ms" |
17 | //usage: "\n -r Repetitions" |
18 | //usage: "\n -n Start new tone" |
19 | |
20 | #include "libbb.h" |
21 | |
22 | #include <linux/kd.h> |
23 | #ifndef CLOCK_TICK_RATE |
24 | # define CLOCK_TICK_RATE 1193180 |
25 | #endif |
26 | |
27 | /* defaults */ |
28 | #ifndef CONFIG_FEATURE_BEEP_FREQ |
29 | # define FREQ (4000) |
30 | #else |
31 | # define FREQ (CONFIG_FEATURE_BEEP_FREQ) |
32 | #endif |
33 | #ifndef CONFIG_FEATURE_BEEP_LENGTH_MS |
34 | # define LENGTH (30) |
35 | #else |
36 | # define LENGTH (CONFIG_FEATURE_BEEP_LENGTH_MS) |
37 | #endif |
38 | #define DELAY (0) |
39 | #define REPETITIONS (1) |
40 | |
41 | int beep_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
42 | int beep_main(int argc, char **argv) |
43 | { |
44 | int speaker = get_console_fd_or_die(); |
45 | unsigned tickrate_div_freq = tickrate_div_freq; /* for compiler */ |
46 | unsigned length = length; |
47 | unsigned delay = delay; |
48 | unsigned rep = rep; |
49 | int c; |
50 | |
51 | c = 'n'; |
52 | while (c != -1) { |
53 | if (c == 'n') { |
54 | tickrate_div_freq = CLOCK_TICK_RATE / FREQ; |
55 | length = LENGTH; |
56 | delay = DELAY; |
57 | rep = REPETITIONS; |
58 | } |
59 | c = getopt(argc, argv, "f:l:d:r:n"); |
60 | /* TODO: -s, -c: |
61 | * pipe stdin to stdout, but also beep after each line (-s) or char (-c) |
62 | */ |
63 | switch (c) { |
64 | case 'f': |
65 | /* TODO: what "-f 0" should do? */ |
66 | tickrate_div_freq = (unsigned)CLOCK_TICK_RATE / xatou(optarg); |
67 | continue; |
68 | case 'l': |
69 | length = xatou(optarg); |
70 | continue; |
71 | case 'd': |
72 | /* TODO: |
73 | * -d N, -D N |
74 | * specify a delay of N milliseconds between repetitions. |
75 | * -d specifies that this delay should only occur between beeps, |
76 | * that is, it should not occur after the last repetition. |
77 | * -D indicates that the delay should occur after every repetition |
78 | */ |
79 | delay = xatou(optarg); |
80 | continue; |
81 | case 'r': |
82 | rep = xatou(optarg); |
83 | continue; |
84 | case 'n': |
85 | case -1: |
86 | break; |
87 | default: |
88 | bb_show_usage(); |
89 | } |
90 | while (rep) { |
91 | //bb_info_msg("rep[%d] freq=%d, length=%d, delay=%d", rep, freq, length, delay); |
92 | xioctl(speaker, KIOCSOUND, (void*)(uintptr_t)tickrate_div_freq); |
93 | usleep(1000 * length); |
94 | ioctl(speaker, KIOCSOUND, (void*)0); |
95 | if (--rep) |
96 | usleep(1000 * delay); |
97 | } |
98 | } |
99 | |
100 | if (ENABLE_FEATURE_CLEAN_UP) |
101 | close(speaker); |
102 | return EXIT_SUCCESS; |
103 | } |
104 | /* |
105 | * so, e.g. Beethoven's 9th symphony "Ode an die Freude" would be |
106 | * something like: |
107 | a=$((220*3)) |
108 | b=$((247*3)) |
109 | c=$((262*3)) |
110 | d=$((294*3)) |
111 | e=$((329*3)) |
112 | f=$((349*3)) |
113 | g=$((392*3)) |
114 | #./beep -f$d -l200 -r2 -n -f$e -l100 -d 10 -n -f$c -l400 -f$g -l200 |
115 | ./beep -f$e -l200 -r2 \ |
116 | -n -d 100 -f$f -l200 \ |
117 | -n -f$g -l200 -r2 \ |
118 | -n -f$f -l200 \ |
119 | -n -f$e -l200 \ |
120 | -n -f$d -l200 \ |
121 | -n -f$c -l200 -r2 \ |
122 | -n -f$d -l200 \ |
123 | -n -f$e -l200 \ |
124 | -n -f$e -l400 \ |
125 | -n -f$d -l100 \ |
126 | -n -f$d -l200 \ |
127 | */ |
128 |