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 the GPL v2 or later, see the file LICENSE in this tarball.
8 *
9 */
10#include "libbb.h"
11
12#include <linux/kd.h>
13#ifndef CLOCK_TICK_RATE
14# define CLOCK_TICK_RATE 1193180
15#endif
16
17/* defaults */
18#ifndef CONFIG_FEATURE_BEEP_FREQ
19# define FREQ (4000)
20#else
21# define FREQ (CONFIG_FEATURE_BEEP_FREQ)
22#endif
23#ifndef CONFIG_FEATURE_BEEP_LENGTH_MS
24# define LENGTH (30)
25#else
26# define LENGTH (CONFIG_FEATURE_BEEP_LENGTH_MS)
27#endif
28#define DELAY (0)
29#define REPETITIONS (1)
30
31int beep_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
32int beep_main(int argc, char **argv)
33{
34	int speaker = get_console_fd_or_die();
35	unsigned tickrate_div_freq = tickrate_div_freq; /* for compiler */
36	unsigned length = length;
37	unsigned delay = delay;
38	unsigned rep = rep;
39	int c;
40
41	c = 'n';
42	while (c != -1) {
43		if (c == 'n') {
44			tickrate_div_freq = CLOCK_TICK_RATE / FREQ;
45			length = LENGTH;
46			delay = DELAY;
47			rep = REPETITIONS;
48		}
49		c = getopt(argc, argv, "f:l:d:r:n");
50/* TODO: -s, -c:
51 * pipe stdin to stdout, but also beep after each line (-s) or char (-c)
52 */
53		switch (c) {
54		case 'f':
55/* TODO: what "-f 0" should do? */
56			tickrate_div_freq = (unsigned)CLOCK_TICK_RATE / xatou(optarg);
57			continue;
58		case 'l':
59			length = xatou(optarg);
60			continue;
61		case 'd':
62/* TODO:
63 * -d N, -D N
64 * specify a delay of N milliseconds between repetitions.
65 * -d specifies that this delay should only occur between beeps,
66 * that is, it should not occur after the last repetition.
67 * -D indicates that the delay should occur after every repetition
68 */
69			delay = xatou(optarg);
70			continue;
71		case 'r':
72			rep = xatou(optarg);
73			continue;
74		case 'n':
75		case -1:
76			break;
77		default:
78			bb_show_usage();
79		}
80		while (rep) {
81//bb_info_msg("rep[%d] freq=%d, length=%d, delay=%d", rep, freq, length, delay);
82			xioctl(speaker, KIOCSOUND, (void*)(uintptr_t)tickrate_div_freq);
83			usleep(1000 * length);
84			ioctl(speaker, KIOCSOUND, (void*)0);
85			if (--rep)
86				usleep(1000 * delay);
87		}
88	}
89
90	if (ENABLE_FEATURE_CLEAN_UP)
91		close(speaker);
92	return EXIT_SUCCESS;
93}
94/*
95 * so, e.g. Beethoven's 9th symphony "Ode an die Freude" would be
96 * something like:
97a=$((220*3))
98b=$((247*3))
99c=$((262*3))
100d=$((294*3))
101e=$((329*3))
102f=$((349*3))
103g=$((392*3))
104#./beep -f$d -l200 -r2 -n -f$e -l100 -d 10 -n -f$c -l400 -f$g -l200
105./beep -f$e -l200 -r2 \
106        -n -d 100 -f$f -l200 \
107        -n -f$g -l200 -r2 \
108        -n -f$f -l200 \
109        -n -f$e -l200 \
110        -n -f$d -l200 \
111        -n -f$c -l200 -r2 \
112        -n -f$d -l200 \
113        -n -f$e -l200 \
114        -n -f$e -l400 \
115        -n -f$d -l100 \
116        -n -f$d -l200 \
117*/
118