//
// Written by Curtis Olson, started March 2001.
//
-// Copyright (C) 2001 Curtis L. Olson - curt@flightgear.org
+// Copyright (C) 2001 Curtis L. Olson - http://www.flightgear.org/~curt
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License as
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
-// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
-// $Id$
#include <simgear/constants.h>
#include "morse.hxx"
+#include <cstring>
static const char alphabet[26][4] = {
- { DI, DAH, end, end }, /* A */
+ { DI, DAH, END, END }, /* A */
{ DA, DI, DI, DIT }, /* B */
{ DA, DI, DA, DIT }, /* C */
- { DA, DI, DIT, end }, /* D */
- { DIT, end, end, end }, /* E */
+ { DA, DI, DIT, END }, /* D */
+ { DIT, END, END, END }, /* E */
{ DI, DI, DA, DIT }, /* F */
- { DA, DA, DIT, end }, /* G */
+ { DA, DA, DIT, END }, /* G */
{ DI, DI, DI, DIT }, /* H */
- { DI, DIT, end, end }, /* I */
+ { DI, DIT, END, END }, /* I */
{ DI, DA, DA, DAH }, /* J */
- { DA, DI, DAH, end }, /* K */
+ { DA, DI, DAH, END }, /* K */
{ DI, DA, DI, DIT }, /* L */
- { DA, DAH, end, end }, /* M */
- { DA, DIT, end, end }, /* N */
- { DA, DA, DAH, end }, /* O */
+ { DA, DAH, END, END }, /* M */
+ { DA, DIT, END, END }, /* N */
+ { DA, DA, DAH, END }, /* O */
{ DI, DA, DA, DIT }, /* P */
{ DA, DA, DI, DAH }, /* Q */
- { DI, DA, DIT, end }, /* R */
- { DI, DI, DIT, end }, /* S */
- { DAH, end, end, end }, /* T */
- { DI, DI, DAH, end }, /* U */
+ { DI, DA, DIT, END }, /* R */
+ { DI, DI, DIT, END }, /* S */
+ { DAH, END, END, END }, /* T */
+ { DI, DI, DAH, END }, /* U */
{ DI, DI, DI, DAH }, /* V */
- { DI, DA, DAH, end }, /* W */
+ { DI, DA, DAH, END }, /* W */
{ DA, DI, DI, DAH }, /* X */
{ DA, DI, DA, DAH }, /* Y */
{ DA, DA, DI, DIT } /* Z */
}
-// Make a tone of specified freq and total_len with trans_len ramp in
-// and out and only the first len bytes with sound, the rest with
-// silence
-void make_tone( unsigned char *buf, int freq,
- int len, int total_len, int trans_len )
-{
- int i, j;
-
- for ( i = 0; i < trans_len; ++i ) {
- float level = ( sin( (double) i * 2.0 * SGD_PI / (BYTES_PER_SECOND / freq) ) )
- * ((double)i / trans_len) / 2.0 + 0.5;
-
- /* Convert to unsigned byte */
- buf[ i ] = (unsigned char) ( level * 255.0 ) ;
- }
-
- for ( i = trans_len; i < len - trans_len; ++i ) {
- float level = ( sin( (double) i * 2.0 * SGD_PI / (BYTES_PER_SECOND / freq) ) )
- / 2.0 + 0.5;
-
- /* Convert to unsigned byte */
- buf[ i ] = (unsigned char) ( level * 255.0 ) ;
- }
- j = trans_len;
- for ( i = len - trans_len; i < len; ++i ) {
- float level = ( sin( (double) i * 2.0 * SGD_PI / (BYTES_PER_SECOND / freq) ) )
- * ((double)j / trans_len) / 2.0 + 0.5;
- --j;
-
- /* Convert to unsigned byte */
- buf[ i ] = (unsigned char) ( level * 255.0 ) ;
- }
- for ( i = len; i < total_len; ++i ) {
- buf[ i ] = (unsigned char) ( 0.5 * 255.0 ) ;
- }
-}
-
-
// allocate and initialize sound samples
bool FGMorse::init() {
// Make Low DIT
// make a SGSoundSample morse code transmission for the specified string
SGSoundSample *FGMorse::make_ident( const string& id, const int freq ) {
+
char *idptr = (char *)id.c_str();
int length = 0;
for ( i = 0; i < (int)id.length(); ++i ) {
if ( idptr[i] >= 'A' && idptr[i] <= 'Z' ) {
int c = (int)(idptr[i] - 'A');
- for ( j = 0; j < 4 || alphabet[c][j] == end; ++j ) {
+ for ( j = 0; j < 4 && alphabet[c][j] != END; ++j ) {
if ( alphabet[c][j] == DIT ) {
length += DIT_SIZE;
} else if ( alphabet[c][j] == DAH ) {
length += 2 * SPACE_SIZE;
// 2. Allocate space for the message
- unsigned char *buffer = new unsigned char[length];
+ const unsigned char* buffer = (const unsigned char *)malloc(length);
// 3. Assemble the message;
- unsigned char *buf_ptr = buffer;
+ unsigned char *buf_ptr = (unsigned char*)buffer;
for ( i = 0; i < (int)id.length(); ++i ) {
if ( idptr[i] >= 'A' && idptr[i] <= 'Z' ) {
int c = (int)(idptr[i] - 'A');
- for ( j = 0; j < 4 || alphabet[c][j] == end; ++j ) {
+ for ( j = 0; j < 4 && alphabet[c][j] != END; ++j ) {
if ( alphabet[c][j] == DIT ) {
memcpy( buf_ptr, dit_ptr, DIT_SIZE );
buf_ptr += DIT_SIZE;
buf_ptr += SPACE_SIZE;
// 4. create the simple sound and return
- SGSoundSample *sample = new SGSoundSample( buffer, length,
+ SGSoundSample *sample = new SGSoundSample( &buffer, length,
BYTES_PER_SECOND );
+
sample->set_reference_dist( 10.0 );
sample->set_max_dist( 20.0 );
return sample;
}
+
+FGMorse * FGMorse::_instance = NULL;
+
+FGMorse * FGMorse::instance()
+{
+ if( _instance == NULL ) {
+ _instance = new FGMorse();
+ _instance->init();
+ }
+ return _instance;
+}
projects / flightgear.git / blobdiff