grub/grub-core/term/morse.c

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/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2011,2012,2013 Free Software Foundation, Inc.
*
* GRUB is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GRUB is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <grub/term.h>
#include <grub/misc.h>
#include <grub/types.h>
#include <grub/err.h>
#include <grub/dl.h>
#include <grub/time.h>
#include <grub/speaker.h>
GRUB_MOD_LICENSE ("GPLv3+");
#define BASE_TIME 250
#define DIH 1
#define DAH 3
#define END 0
static const char codes[0x80][6] =
{
['0'] = { DAH, DAH, DAH, DAH, DAH, END },
['1'] = { DIH, DAH, DAH, DAH, DAH, END },
['2'] = { DIH, DIH, DAH, DAH, DAH, END },
['3'] = { DIH, DIH, DIH, DAH, DAH, END },
['4'] = { DIH, DIH, DIH, DIH, DAH, END },
['5'] = { DIH, DIH, DIH, DIH, DIH, END },
['6'] = { DAH, DIH, DIH, DIH, DIH, END },
['7'] = { DAH, DAH, DIH, DIH, DIH, END },
['8'] = { DAH, DAH, DAH, DIH, DIH, END },
['9'] = { DAH, DAH, DAH, DAH, DIH, END },
['a'] = { DIH, DAH, END },
['b'] = { DAH, DIH, DIH, DIH, END },
['c'] = { DAH, DIH, DAH, DIH, END },
['d'] = { DAH, DIH, DIH, END },
['e'] = { DIH, END },
['f'] = { DIH, DIH, DAH, DIH, END },
['g'] = { DAH, DAH, DIH, END },
['h'] = { DIH, DIH, DIH, DIH, END },
['i'] = { DIH, DIH, END },
['j'] = { DIH, DAH, DAH, DAH, END },
['k'] = { DAH, DIH, DAH, END },
['l'] = { DIH, DAH, DIH, DIH, END },
['m'] = { DAH, DAH, END },
['n'] = { DAH, DIH, END },
['o'] = { DAH, DAH, DAH, END },
['p'] = { DIH, DAH, DAH, DIH, END },
['q'] = { DAH, DAH, DIH, DAH, END },
['r'] = { DIH, DAH, DIH, END },
['s'] = { DIH, DIH, DIH, END },
['t'] = { DAH, END },
['u'] = { DIH, DIH, DAH, END },
['v'] = { DIH, DIH, DIH, DAH, END },
['w'] = { DIH, DAH, DAH, END },
['x'] = { DAH, DIH, DIH, DAH, END },
['y'] = { DAH, DIH, DAH, DAH, END },
['z'] = { DAH, DAH, DIH, DIH, END }
};
static void
grub_audio_tone (int length)
{
grub_speaker_beep_on (1000);
grub_millisleep (length);
grub_speaker_beep_off ();
}
static void
grub_audio_putchar (struct grub_term_output *term __attribute__ ((unused)),
const struct grub_unicode_glyph *c_in)
{
grub_uint8_t c;
int i;
/* For now, do not try to use a surrogate pair. */
if (c_in->base > 0x7f)
c = '?';
else
c = grub_tolower (c_in->base);
for (i = 0; codes[c][i]; i++)
{
grub_audio_tone (codes[c][i] * BASE_TIME);
grub_millisleep (BASE_TIME);
}
grub_millisleep (2 * BASE_TIME);
}
static int
dummy (void)
{
return 0;
}
static struct grub_term_output grub_audio_term_output =
{
.name = "morse",
.init = (void *) dummy,
.fini = (void *) dummy,
.putchar = grub_audio_putchar,
.getwh = (void *) dummy,
.getxy = (void *) dummy,
.gotoxy = (void *) dummy,
.cls = (void *) dummy,
.setcolorstate = (void *) dummy,
.setcursor = (void *) dummy,
.flags = GRUB_TERM_CODE_TYPE_ASCII | GRUB_TERM_DUMB,
.progress_update_divisor = GRUB_PROGRESS_NO_UPDATE
};
GRUB_MOD_INIT (morse)
{
grub_term_register_output ("audio", &grub_audio_term_output);
}
GRUB_MOD_FINI (morse)
{
grub_term_unregister_output (&grub_audio_term_output);
}