app_morsecode.c File Reference

Morsecode application. More...

#include "asterisk.h"
#include "asterisk/file.h"
#include "asterisk/channel.h"
#include "asterisk/pbx.h"
#include "asterisk/module.h"
#include "asterisk/indications.h"

Include dependency graph for app_morsecode.c:

Go to the source code of this file.

Functions
	AST_MODULE_INFO_STANDARD_EXTENDED (ASTERISK_GPL_KEY, "Morse code")
static int	load_module (void)
static int	morsecode_exec (struct ast_channel *chan, const char *data)
static int	playtone (struct ast_channel *chan, int tone, int len)
static int	unload_module (void)

Variables
static const char *const	americanmorsecode []
static const char	app_morsecode [] = "Morsecode"
static const char *const	internationalcode []

Detailed Description

Morsecode application.

Author

Tilghman Lesher app_m.nosp@m.orse.nosp@m.code_.nosp@m._v00.nosp@m.1@the.nosp@m.-til.nosp@m.ghman.nosp@m..com

Naveen Albert aster.nosp@m.isk@.nosp@m.phrea.nosp@m.knet.nosp@m..org

Definition in file app_morsecode.c.

Function Documentation

AST_MODULE_INFO_STANDARD_EXTENDED()

AST_MODULE_INFO_STANDARD_EXTENDED	(	ASTERISK_GPL_KEY	,
		"Morse code"
	)

Referenced by load_module().

load_module()

static int load_module ( void  )

static

Definition at line 295 of file app_morsecode.c.

References app_morsecode, AST_MODULE_INFO_STANDARD_EXTENDED(), ast_register_application_xml, ASTERISK_GPL_KEY, and morsecode_exec().

{
   return ast_register_application_xml(app_morsecode, morsecode_exec);
}

morsecode_exec()

static int morsecode_exec ( struct ast_channel *  chan, const char *  data  )

static

Definition at line 181 of file app_morsecode.c.

References americanmorsecode, ast_channel_lock, ast_channel_unlock, ast_log, ast_strlen_zero, digit, internationalcode, LOG_WARNING, pbx_builtin_getvar_helper(), and playtone().

Referenced by load_module().

{
   int res = 0, ditlen, tone, toneoff, digit2;
   const char *digit;
   const char *ditlenc, *tonec, *toneb, *codetype;

   if (ast_strlen_zero(data)) {
      ast_log(LOG_WARNING, "Syntax: Morsecode(<string>) - no argument found\n");
      return 0;
   }

   /* Use variable MORESEDITLEN, if set (else 80) */
   ast_channel_lock(chan);
   ditlenc = pbx_builtin_getvar_helper(chan, "MORSEDITLEN");
   if (ast_strlen_zero(ditlenc) || (sscanf(ditlenc, "%30d", &ditlen) != 1)) {
      ditlen = 80;
   }
   ast_channel_unlock(chan);

   /* Use variable MORSETONE, if set (else 800) */
   ast_channel_lock(chan);
   tonec = pbx_builtin_getvar_helper(chan, "MORSETONE");
   if (ast_strlen_zero(tonec) || (sscanf(tonec, "%30d", &tone) != 1)) {
      tone = 800;
   }
   ast_channel_unlock(chan);

   /* Use variable MORSEOFF, if set (else 0) */
   ast_channel_lock(chan);
   toneb = pbx_builtin_getvar_helper(chan, "MORSEOFF");
   if (ast_strlen_zero(toneb) || (sscanf(toneb, "%30d", &toneoff) != 1)) {
      toneoff = 0;
   }
   ast_channel_unlock(chan);

   /* Use variable MORSETYPE, if set (else INTERNATIONAL) */
   ast_channel_lock(chan);
   codetype = pbx_builtin_getvar_helper(chan, "MORSETYPE");
   if (!codetype || strcmp(codetype, "AMERICAN")) {
      codetype = "INTERNATIONAL";
   }
   ast_channel_unlock(chan);

   if (!strcmp(codetype, "AMERICAN")) {
      for (digit = data; *digit; digit++) {
         const char *dahdit;
         digit2 = *digit;
         if (digit2 < 0 || digit2 > 127) {
            continue;
         }
         for (dahdit = americanmorsecode[digit2]; *dahdit; dahdit++) {
            if (*dahdit == '-') {
               res = playtone(chan, tone, 3 * ditlen);
            } else if (*dahdit == '.') {
               res = playtone(chan, tone, 1 * ditlen);
            } else if (*dahdit == 'L') {
               res = playtone(chan, tone, 6 * ditlen); /* long dash */
            } else if (*dahdit == '0') {
               res = playtone(chan, tone, 9 * ditlen); /* extra long dash */
            } else if (*dahdit == ' ') { /* space char (x20) = 6 dot lengths */
               /* Intra-char pauses, specific to American Morse */
               res = playtone(chan, toneoff, 3 * ditlen);
            } else {
               /* Account for ditlen of silence immediately following */
               res = playtone(chan, toneoff, 2 * ditlen);
            }

            /* Pause slightly between each dit and dah */
            res = playtone(chan, toneoff, 1 * ditlen);
            if (res)
               break;
         }
         /* Pause between characters */
         res = playtone(chan, toneoff, 3 * ditlen);
         if (res)
            break;
      }
   } else { /* International */
      for (digit = data; *digit; digit++) {
         const char *dahdit;
         digit2 = *digit;
         if (digit2 < 0 || digit2 > 127) {
            continue;
         }
         for (dahdit = internationalcode[digit2]; *dahdit; dahdit++) {
            if (*dahdit == '-') {
               res = playtone(chan, tone, 3 * ditlen);
            } else if (*dahdit == '.') {
               res = playtone(chan, tone, 1 * ditlen);
            } else {
               /* Account for ditlen of silence immediately following */
               res = playtone(chan, toneoff, 2 * ditlen);
            }

            /* Pause slightly between each dit and dah */
            res = playtone(chan, toneoff, 1 * ditlen);
            if (res)
               break;
         }
         /* Pause between characters */
         res = playtone(chan, toneoff, 2 * ditlen);
         if (res)
            break;
      }
   }

   return res;
}

playtone()

static int playtone ( struct ast_channel *  chan, int  tone, int  len  )

static

Definition at line 170 of file app_morsecode.c.

References ast_playtones_start(), ast_playtones_stop(), and ast_safe_sleep().

Referenced by action_bridge(), and morsecode_exec().

{
   int res;
   char dtmf[20];
   snprintf(dtmf, sizeof(dtmf), "%d/%d", tone, len);
   ast_playtones_start(chan, 0, dtmf, 0);
   res = ast_safe_sleep(chan, len);
   ast_playtones_stop(chan);
   return res;
}

unload_module()

static int unload_module ( void  )

static

Definition at line 290 of file app_morsecode.c.

References app_morsecode, and ast_unregister_application().

{
   return ast_unregister_application(app_morsecode);
}

Variable Documentation

americanmorsecode

const char* const americanmorsecode[]

static

Definition at line 126 of file app_morsecode.c.

Referenced by morsecode_exec().

app_morsecode

const char app_morsecode[] = "Morsecode"

static

Definition at line 80 of file app_morsecode.c.

Referenced by load_module(), and unload_module().

internationalcode

const char* const internationalcode[]

static

Definition at line 82 of file app_morsecode.c.

Referenced by morsecode_exec().