1 files changed, 133 insertions, 0 deletions
diff --git a/grub-core/term/morse.c b/grub-core/term/morse.c
new file mode 100644
index 0000000..13b8e86
--- /dev/null
+++ b/grub-core/term/morse.c
@@ -0,0 +1,133 @@
+/*
+ *  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);
+}