189 lines
5.1 KiB
C
189 lines
5.1 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (c) 2006, Tilghman Lesher. All rights reserved.
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*
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* Tilghman Lesher <app_morsecode__v001@the-tilghman.com>
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*
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* This code is released by the author with no restrictions on usage.
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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*/
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/*! \file
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*
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* \brief Morsecode application
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*
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* \author Tilghman Lesher <app_morsecode__v001@the-tilghman.com>
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*
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* \ingroup applications
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*/
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/*** MODULEINFO
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<support_level>extended</support_level>
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***/
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#include "asterisk.h"
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ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
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#include "asterisk/file.h"
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#include "asterisk/channel.h"
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#include "asterisk/pbx.h"
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#include "asterisk/module.h"
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#include "asterisk/indications.h"
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/*** DOCUMENTATION
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<application name="Morsecode" language="en_US">
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<synopsis>
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Plays morse code.
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</synopsis>
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<syntax>
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<parameter name="string" required="true">
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<para>String to playback as morse code to channel</para>
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</parameter>
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</syntax>
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<description>
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<para>Plays the Morse code equivalent of the passed string.</para>
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<para>This application uses the following variables:</para>
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<variablelist>
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<variable name="MORSEDITLEN">
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<para>Use this value in (ms) for length of dit</para>
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</variable>
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<variable name="MORSETONE">
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<para>The pitch of the tone in (Hz), default is 800</para>
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</variable>
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</variablelist>
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</description>
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<see-also>
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<ref type="application">SayAlpha</ref>
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<ref type="application">SayPhonetic</ref>
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</see-also>
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</application>
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***/
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static const char app_morsecode[] = "Morsecode";
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static const char * const morsecode[] = {
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"", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", /* 0-15 */
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"", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", /* 16-31 */
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" ", /* 32 - <space> */
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".-.-.-", /* 33 - ! */
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".-..-.", /* 34 - " */
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"", /* 35 - # */
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"", /* 36 - $ */
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"", /* 37 - % */
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"", /* 38 - & */
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".----.", /* 39 - ' */
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"-.--.-", /* 40 - ( */
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"-.--.-", /* 41 - ) */
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"", /* 42 - * */
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"", /* 43 - + */
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"--..--", /* 44 - , */
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"-....-", /* 45 - - */
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".-.-.-", /* 46 - . */
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"-..-.", /* 47 - / */
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"-----", ".----", "..---", "...--", "....-", ".....", "-....", "--...", "---..", "----.", /* 48-57 - 0-9 */
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"---...", /* 58 - : */
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"-.-.-.", /* 59 - ; */
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"", /* 60 - < */
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"-...-", /* 61 - = */
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"", /* 62 - > */
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"..--..", /* 63 - ? */
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".--.-.", /* 64 - @ */
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".-", "-...", "-.-.", "-..", ".", "..-.", "--.", "....", "..", ".---", "-.-", ".-..", "--",
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"-.", "---", ".--.", "--.-", ".-.", "...", "-", "..-", "...-", ".--", "-..-", "-.--", "--..",
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"-.--.-", /* 91 - [ (really '(') */
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"-..-.", /* 92 - \ (really '/') */
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"-.--.-", /* 93 - ] (really ')') */
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"", /* 94 - ^ */
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"..--.-", /* 95 - _ */
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".----.", /* 96 - ` */
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".-", "-...", "-.-.", "-..", ".", "..-.", "--.", "....", "..", ".---", "-.-", ".-..", "--",
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"-.", "---", ".--.", "--.-", ".-.", "...", "-", "..-", "...-", ".--", "-..-", "-.--", "--..",
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"-.--.-", /* 123 - { (really '(') */
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"", /* 124 - | */
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"-.--.-", /* 125 - } (really ')') */
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"-..-.", /* 126 - ~ (really bar) */
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". . .", /* 127 - <del> (error) */
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};
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static void playtone(struct ast_channel *chan, int tone, int len)
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{
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char dtmf[20];
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snprintf(dtmf, sizeof(dtmf), "%d/%d", tone, len);
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ast_playtones_start(chan, 0, dtmf, 0);
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ast_safe_sleep(chan, len);
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ast_playtones_stop(chan);
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}
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static int morsecode_exec(struct ast_channel *chan, const char *data)
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{
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int res=0, ditlen, tone;
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const char *digit;
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const char *ditlenc, *tonec;
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if (ast_strlen_zero(data)) {
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ast_log(LOG_WARNING, "Syntax: Morsecode(<string>) - no argument found\n");
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return 0;
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}
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/* Use variable MORESEDITLEN, if set (else 80) */
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ast_channel_lock(chan);
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ditlenc = pbx_builtin_getvar_helper(chan, "MORSEDITLEN");
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if (ast_strlen_zero(ditlenc) || (sscanf(ditlenc, "%30d", &ditlen) != 1)) {
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ditlen = 80;
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}
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ast_channel_unlock(chan);
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/* Use variable MORSETONE, if set (else 800) */
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ast_channel_lock(chan);
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tonec = pbx_builtin_getvar_helper(chan, "MORSETONE");
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if (ast_strlen_zero(tonec) || (sscanf(tonec, "%30d", &tone) != 1)) {
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tone = 800;
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}
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ast_channel_unlock(chan);
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for (digit = data; *digit; digit++) {
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int digit2 = *digit;
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const char *dahdit;
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if (digit2 < 0) {
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continue;
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}
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for (dahdit = morsecode[digit2]; *dahdit; dahdit++) {
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if (*dahdit == '-') {
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playtone(chan, tone, 3 * ditlen);
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} else if (*dahdit == '.') {
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playtone(chan, tone, 1 * ditlen);
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} else {
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/* Account for ditlen of silence immediately following */
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playtone(chan, 0, 2 * ditlen);
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}
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/* Pause slightly between each dit and dah */
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playtone(chan, 0, 1 * ditlen);
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}
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/* Pause between characters */
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playtone(chan, 0, 2 * ditlen);
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}
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return res;
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}
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static int unload_module(void)
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{
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return ast_unregister_application(app_morsecode);
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}
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static int load_module(void)
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{
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return ast_register_application_xml(app_morsecode, morsecode_exec);
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}
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AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Morse code");
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