More work on morse code ...

src/Main/main.cxx

@@ -117,6 +117,7 @@ int objc=0;
 #include "fg_io.hxx"
 #include "globals.hxx"
 #include "keyboard.hxx"
+#include "morse.hxx"
 #include "splash.hxx"
 
 #ifdef ENABLE_AUDIO_SUPPORT
@@ -1191,8 +1192,11 @@ static void fgIdleFunction ( void ) {
 		    << "  Bps = " << s1->get_sample()->getBps()
 		    << "  Stereo = " << s1->get_sample()->getStereo() );
 
-	    s2 = new FGSimpleSound( "Sounds/corflaps.wav" );
-	    s2->set_volume( 2.0 );
+	    // s2 = new FGSimpleSound( "Sounds/corflaps.wav" );
+	    // s2->set_volume( 2.0 );
+	    FGMorse mmm;
+	    mmm.init();
+	    s2 = mmm.make_ident( "JLI" );
 	    globals->get_soundmgr()->add( s2, "flaps" );
 	}
 #endif

src/Main/morse.cxx

@@ -38,7 +38,6 @@ bool FGMorse::init() {
     int i, j;
 
     // Make DIT
-    unsigned char dit[ DIT_SIZE ] ;
     for ( i = 0; i < TRANSITION_BYTES; ++i ) {
 	float level = ( sin( (double) i * 2.0 * M_PI / (8000.0 / FREQUENCY)) )
 	    * ((double)i / TRANSITION_BYTES) / 2.0 + 0.5;
@@ -71,7 +70,6 @@ bool FGMorse::init() {
     }
 
     // Make DAH
-    unsigned char dah[ DAH_SIZE ] ;
     for ( i = 0; i < TRANSITION_BYTES; ++i ) {
 	float level = ( sin( (double) i * 2.0 * M_PI / (8000.0 / FREQUENCY) ) )
 	    * ((double)i / TRANSITION_BYTES) / 2.0 + 0.5;
@@ -114,5 +112,56 @@ bool FGMorse::init() {
 
 
 // make a FGSimpleSound morse code transmission for the specified string
-FGSimpleSound FGMorse::make_ident( const string& id ) {
+FGSimpleSound *FGMorse::make_ident( const string& id ) {
+    char *idptr = (char *)id.c_str();
+
+    int length = 0;
+    int i, j;
+
+    // 1. Determine byte length of message
+    for ( i = 0; i < (int)id.length(); ++i ) {
+	if ( idptr[i] >= 'A' && idptr[i] <= 'Z' ) {
+	    char c = idptr[i] - 'A';
+	    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 += DAH_SIZE;
+		}
+	    }
+	    length += SPACE_SIZE;
+	} else {
+	    // skip unknown character
+	}
+    }
+
+    // 2. Allocate space for the message
+    unsigned char *buffer = new unsigned char[length];
+
+    // 3. Assemble the message;
+    unsigned char *bufptr = buffer;
+
+    for ( i = 0; i < (int)id.length(); ++i ) {
+	if ( idptr[i] >= 'A' && idptr[i] <= 'Z' ) {
+	    char c = idptr[i] - 'A';
+	    for ( j = 0; j < 4 || alphabet[c][j] == end; ++j ) {
+		if ( alphabet[c][j] == DIT ) {
+		    memcpy( bufptr, dit, DIT_SIZE );
+		    bufptr += DIT_SIZE;
+		} else if ( alphabet[c][j] == DAH ) {
+		    memcpy( bufptr, dah, DAH_SIZE );
+		    bufptr += DAH_SIZE;
+		}
+	    }
+	    memcpy( bufptr, space, SPACE_SIZE );
+	    bufptr += SPACE_SIZE;
+	} else {
+	    // skip unknown character
+	}
+    }
+
+    // 4. create the simple sound and return
+    FGSimpleSound *sample = new FGSimpleSound( buffer, length );
+
+    return sample;
 }

src/Main/morse.hxx

@@ -91,7 +91,7 @@ static const char end = '0';
 
 static const int BYTES_PER_SECOND = 8000;
 static const int BEAT_LENGTH = 240; // milleseconds (5 wpm)
-static const int TRANSITION_BYTES = 40;
+static const int TRANSITION_BYTES = (int)(0.005 * BYTES_PER_SECOND);
 static const int COUNT_SIZE = BYTES_PER_SECOND * BEAT_LENGTH / 1000;
 static const int DIT_SIZE = 2 * COUNT_SIZE;   // 2 counts
 static const int DAH_SIZE = 4 * COUNT_SIZE;   // 4 counts
@@ -143,7 +143,7 @@ public:
     bool init();
 
     // make a FGSimpleSound morse code transmission for the specified string
-    FGSimpleSound make_ident( const string& id );
+    FGSimpleSound *make_ident( const string& id );
 };
 
 

src/Main/soundmgr.cxx

@@ -24,6 +24,7 @@
 // $Id$
 
 
+#include <simgear/debug/logstream.hxx>
 #include <simgear/misc/fgpath.hxx>
 
 #include "globals.hxx"
@@ -61,6 +62,11 @@ FGSimpleSound::~FGSimpleSound() {
 FGSoundMgr::FGSoundMgr() {
     audio_sched = new slScheduler( 8000 );
     audio_mixer = new smMixer;
+
+    FG_LOG( FG_GENERAL, FG_INFO,
+	    "Rate = " << audio_sched->getRate()
+	    << "  Bps = " << audio_sched->getBps()
+	    << "  Stereo = " << audio_sched->getStereo() );
 }
 
 // destructor