Refactor morse and beacon as singleton

[flightgear.git] / src / Sound / morse.cxx

diff --git a/src/Sound/morse.cxx b/src/Sound/morse.cxx
index 7ae7cac98871672cd553aaca2d2b6ac83e18682e..9ff603322b8452ddb4451f3fb25e900265ffe47b 100644 (file)
--- a/src/Sound/morse.cxx
+++ b/src/Sound/morse.cxx
@@ -18,7 +18,6 @@
 // along with this program; if not, write to the Free Software
 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 //
-// $Id$
 
 
 #include <simgear/constants.h>
@@ -79,44 +78,6 @@ FGMorse::~FGMorse() {
 }
 
 
-// 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 * SGD_2PI / (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 * SGD_2PI / (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 * SGD_2PI / (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
@@ -270,3 +231,14 @@ SGSoundSample *FGMorse::make_ident( const string& id, const int freq ) {
 
     return sample;
 }
+
+FGMorse * FGMorse::_instance = NULL;
+
+FGMorse * FGMorse::instance()
+{
+    if( _instance == NULL ) {
+        _instance = new FGMorse();
+        _instance->init();
+    }
+    return _instance;
+}