hekeus@6: #include "melodyTriangle.h"
hekeus@6: #include <GLUT/GLUT.h> 
hekeus@6: 
samer@23: #define BUFFER_ZONE 64 // have to drag this far to snap out of triange.
samer@32: #define NUM_TEMPI 9
samer@22: 
samer@32: static int tempi[]={20,30,45,60,90,120,150,180,240};
samer@32: 
samer@37: static ofxOscBundle& operator<<(ofxOscBundle &bundle, ofxOscMessage msg) { 
samer@37: 	bundle.addMessage(msg); return bundle; 
samer@37: }
samer@37: 
samer@37: static ofxOscSender& operator<<(ofxOscSender &sender, ofxOscMessage msg) { 
samer@37: 	sender.sendMessage(msg);
samer@37: 	return sender;
samer@37: }
samer@37: 
samer@37: static ofxOscSender& operator<<(ofxOscSender &sender, ofxOscBundle bundle) { 
samer@37: 	sender.sendBundle(bundle);
samer@37: 	return sender;
samer@37: }
samer@37: 	
samer@25: 
samer@22: melodyTriangle::melodyTriangle(const char *host, int port, int numVoices, 
samer@22: 							   bool enableKeys,int voiceIdOffset,int receivePort): 
samer@31: 	numVoices(numVoices), receivePort(receivePort), snapTruePos(enableKeys),
samer@37: 	enableKeys(enableKeys), randInit(false),allowExit(true), ratio(2), tempoIndex(4),
samer@30: 	display_msg(""), display_frames(0)
samer@22: {
samer@22: 	for (int i=0;i<numVoices;i++) voices[i]=new Voice(i+1+voiceIdOffset);
samer@22: 	
hekeus@6: 	sender.setup( host,port );
hekeus@8: 	receiver.setup( receivePort );
samer@29: 	display_font.loadFont("/System/Library/Fonts/LucidaGrande.ttc",24);
hekeus@6: }
hekeus@6: 
samer@22: melodyTriangle::~melodyTriangle() {
samer@22: 	printf("Deleting voice objects...\n");
samer@22: 	for (int i=0;i<numVoices;i++) delete voices[i];
samer@22: }
samer@22: 	
hekeus@6: //--------------------------------------------------------------
hekeus@6: void melodyTriangle::setup(){
samer@22: 	ofSetCircleResolution(64);
hekeus@6: 	ofBackground(0,0,0);
hekeus@6: 	ofSetWindowTitle("Melody Triangle");
samer@23: 	ofSetFrameRate(40); // caps framerate if vertical sync is off.
samer@18: 	ofEnableSmoothing();
samer@18: 
samer@18: 	// Set up triange coordinates. 
samer@18: 	// NB. whatever happens here, the triangle must be
samer@18: 	// isosceles and left-right symmetric around x=x1.
samer@18: 	// Otherwise the clipping won't work
samer@22: 	fitTriangleIn(ofGetWidth(),ofGetHeight());
samer@37: 	
samer@37: 	ofxOscBundle bundle;
samer@37: 	sender << ( bundle 
samer@37: 				<< msg("/tempo",tempi[tempoIndex])
samer@37: 				<< msgCalibrate()
samer@37: 			    << msgReplyTo());
hekeus@6: 	
samer@25: 	voiceGrabbed=NULL;
samer@12: }
samer@12: 
hekeus@6: //--------------------------------------------------------------
hekeus@6: void melodyTriangle::update(){
samer@22: 	bool sendStart=false;
samer@22: 
samer@22: 	while( receiver.hasWaitingMessages() ) {
hekeus@8: 		// get the next message
hekeus@8: 		ofxOscMessage m;
hekeus@8: 		receiver.getNextMessage( &m );
samer@22: 		handleMessage(m);
hekeus@8: 	}
samer@15: 	
samer@22: 	constrained=false;
samer@25: 	if (voiceGrabbed!=NULL){
samer@25: 		Voice *vg=voiceGrabbed;
samer@14: 		if (mouseX!=vg->posx || mouseY!=vg->posy){
samer@15: 			int clipx=mouseX, clipy=mouseY;
samer@15: 			bool clipped=clipToTriangle(&clipx,&clipy);
samer@37: 			ofxOscBundle bundle;
samer@15: 			
samer@15: 			if (vg->inTriangle) {
hekeus@6: 				
samer@15: 				if (clipped) {
samer@15: 					// check how far we clipped
samer@30: 					if (ofDist(clipx, clipy, mouseX, mouseY)>BUFFER_ZONE && allowExit) { 
samer@15: 						// if far enough, we pop out of triangle and send
samer@37: 						bundle << msg("/death",vg->id);
samer@37: 						sender << bundle;
samer@15: 						vg->posx=mouseX;
samer@15: 						vg->posy=mouseY;
samer@15: 						vg->inTriangle=false;
samer@23: 						vg->status=Voice::pending;
samer@15: 					} else {
samer@15: 						// otherwise, we move to clipped point
samer@15: 						constrained=true;
samer@15: 						vg->posx=clipx;
samer@15: 						vg->posy=clipy;
samer@15: 					}
samer@15: 				} else { // not clipped; normal move
samer@15: 					vg->posx=mouseX;
samer@15: 					vg->posy=mouseY;
samer@15: 				}
samer@15: 			} else { // token was outside triangle
samer@15: 				vg->posx=mouseX;
samer@15: 				vg->posy=mouseY;
samer@15: 				if (!clipped){ // ie mouse now in triangle
samer@37: 					bundle << msg("/birth",vg->id)
samer@37: 						   << msgAmplitude(vg->id,vg->amplitude)
samer@37: 					       << ( randInit
samer@37: 					          ?	msg("/randinit",vg->id)
samer@37: 							  : msgOctave(vg->id,vg->octave)
samer@37: 							  );
samer@15: 					sendStart=true;
samer@15: 					vg->inTriangle=true;
samer@25: 					vg->truex=vg->truey=-1; // ie not known yet.
hekeus@6: 				}
hekeus@6: 			}
hekeus@6: 			
samer@14: 			if (vg->inTriangle){
samer@37: 				bundle << msgPosition(vg);
samer@18: 				vg->status=Voice::moved;
samer@37: 				if (sendStart && vg->isActive) bundle << msg("/start",vg->id);
samer@37: 				sender << bundle;
hekeus@6: 			}
hekeus@6: 		}
hekeus@6: 	};
samer@22: }
samer@10: 
samer@22: 
samer@22: 
samer@22: //--------------------------------------------------------------
samer@22: void melodyTriangle::draw(){
samer@11: 	ofSetLineWidth(2);
samer@23: 	ofSetColor(60,60,60);
samer@10: 	ofFill();		
samer@10: 	ofTriangle(x1, y1, x2, y2, x3, y3);
samer@10: 
samer@10: 	// draw smooth edge, brighter if a token is constrained
samer@23: 	if (constrained) ofSetColor(255,96,96);
samer@10: 	ofNoFill();		
samer@10: 	ofTriangle(x1, y1, x2, y2, x3, y3);
samer@10: 	
samer@25: 	for (int i=numVoices-1; i>=0; i--){
samer@32: 		voices[i]->draw(enableKeys && voices[i]->isInVoice(mouseX,mouseY));
hekeus@6: 	}
hekeus@6: 	
samer@22: 	// display message if any
samer@23: 	if (display_frames!=0) {
samer@23: 		ofRectangle bbox=display_font.getStringBoundingBox(display_msg,0,0);
samer@22: 		ofSetColor(220,220,220);
samer@23: 		display_font.drawString(display_msg,
samer@23: 			(ofGetWidth()-bbox.width)/2, (ofGetHeight()-bbox.height)/2);
samer@23: 		if (display_frames>0) display_frames--;
samer@22: 	}
samer@25: 	if (ratio!=2) {
samer@25: 		ofSetColor(160,160,160);
samer@25: 		display_font.drawString(ofToString(ratio),16,ofGetHeight()-16);
samer@25: 	}
hekeus@6: }
hekeus@6: 
samer@22: bool melodyTriangle::clipToTriangle(int *x, int *y) {
samer@22: 	bool clipped;
samer@22: 	
samer@22: 	if (*y>y2) { // off the bottom
samer@22: 		clipped=true;
samer@22: 		*y=y2;
samer@22: 		if (*x<x2) *x=x2; 
samer@22: 		else if (*x>x3) *x=x3;
samer@22: 	} else { // have to be a bit cleverer
samer@22: 		bool reflect=false;
samer@22: 		if (*x<x1) { // work in reflected coordinates
samer@22: 			reflect=true;
samer@22: 			*x=2*x1-*x;
samer@22: 		}
samer@22: 		
samer@22: 		int dx=(*x-x1), dy=(*y-y1); // deltas from top
samer@22: 		if (dx*DY13 > dy*DX13) {
samer@22: 			// (x,y) must be somewhere right of triangle now
samer@22: 			clipped=true;
samer@22: 			int dp=dx*DX13 + dy*DY13;
samer@22: 			if (dp<0) { *x=x1; *y=y1; } // off the top
samer@22: 			else if (dp>SQLEN13) { *x=x3; *y=y3; } // off the bottom right
samer@22: 			else { // project onto right edge
samer@22: 				*x=x1+dp*DX13/SQLEN13;
samer@22: 				*y=y1+dp*DY13/SQLEN13;
samer@22: 			}
samer@22: 		} else {
samer@22: 			clipped=false;
samer@22: 		}
samer@22: 		
samer@22: 		if (reflect) *x=2*x1 - *x; // reflect back if necessary
samer@22: 	}
samer@22: 	return clipped;
samer@22: }
samer@22: 
samer@22: 
samer@22: 
samer@22: //- Keyboard ----------------------------------------------------------
samer@22: 
samer@25: void melodyTriangle::keyReleased(int key){
samer@25: 	if (enableKeys && key>='2' && key<='9') {
samer@25: 		ratio=2;
samer@25: 	}
samer@25: }
samer@23: void melodyTriangle::keyPressed(int key){
hekeus@6: 	if (enableKeys){
samer@25: 		if (key>='2' && key<='9') {
samer@25: 			ratio=key-'0';
samer@25: 		} else {
samer@25: 			printf("got key: %d.\n",key);
samer@25: 			switch (key) {
samer@25: 					
samer@25: 				case '{': 
samer@25: 					if (tempoIndex>0) tempoIndex--; 
samer@37: 					sender << msg("/tempo",tempi[tempoIndex]); 
samer@25: 					break;
samer@25: 				case '}': 
samer@32: 					if (tempoIndex<NUM_TEMPI-1) tempoIndex++;
samer@37: 					sender << msg("/tempo",tempi[tempoIndex]); 
samer@25: 					break;
samer@25: 					
samer@37: 				case ' ': sender << msg("/marker"); break;
samer@37: 				case 'S': sender << msg("/save"); break;
samer@37: 				case 'r': sender << msg("/report"); break;
samer@37: 				case 'i': 
samer@37: 					randInit ^= true; 
samer@37: 					display_msg = (randInit?"randomise on birth":"no randomise on birth");
samer@37: 					display_frames = 40;
samer@37: 					break;
samer@37: 				case 'C': {
samer@37: 					ofxOscBundle bundle;
samer@37: 					sender << (bundle << msgReplyTo() << msgCalibrate()); 
samer@37: 					break;
samer@37: 				}
samer@25: 				case 'F': ofToggleFullscreen(); break;
samer@25: 				case 'R': reset(); break;
samer@25: 				case 'Q': ofAppGlutWindow::exitApp();
samer@30: 				case OF_KEY_ESC: setKeyboardEnable(false); break;
samer@25: 
samer@25: 				default: // otherwise, send key to all voices under mouse
samer@25: 					for (int i=0; i<numVoices; i++)
samer@25: 						if (voices[i]->isInVoice(mouseX,mouseY)) 
samer@25: 							voiceKeypress(voices[i],key);
samer@12: 			}
hekeus@6: 		}
samer@30: 	} else {
samer@30: 		if (key==OF_KEY_ESC) setKeyboardEnable(true);
samer@37: 		else sender << msg("/key",key);
samer@30: 	}
samer@23: }
samer@23: 
samer@23: void melodyTriangle::voiceKeypress(Voice *v, int key) {
samer@23: 	switch (key) {
samer@25: 		case 'a':
samer@32: 			if (v->inTriangle) {
samer@37: 				sender << msg(v->isActive ? "/stop" : "/start", v->id);
samer@32: 			}
samer@23: 			v->isActive=!v->isActive;
samer@23: 			break;
samer@37: 		case OF_KEY_LEFT:  sender << msgShift(v->id,-1,ratio); break;
samer@37: 		case OF_KEY_RIGHT: sender << msgShift(v->id,1,ratio); break;
samer@37: 		case OF_KEY_UP:    sender << msgPeriod(v->id,1,ratio); break;
samer@37: 		case OF_KEY_DOWN:  sender << msgPeriod(v->id,ratio,1); break;
samer@37: 		case ']': sender << msgOctave(v->id, ++v->octave); break;
samer@37: 		case '[': sender << msgOctave(v->id, --v->octave); break;
samer@37: 		case '*': sender << msgAmplitude(v->id, v->louder()); break;
samer@37: 		case '/': sender << msgAmplitude(v->id, v->quieter()); break;
samer@37: 		case 'c': sender << msg("/change",v->id); v->status=Voice::pending; break;
samer@23: 		default:  printf("unrecognised key: %d.\n",key);
hekeus@6: 	}
hekeus@6: }
hekeus@6: 
samer@22: //- Mouse ------------------------------------------------------
hekeus@6: 
samer@22: void melodyTriangle::mouseDragged(int x, int y, int button){}
samer@23: void melodyTriangle::mouseMoved(int x, int y ){}
samer@23: void melodyTriangle::mousePressed(int x, int y, int button){
samer@25: 	// pick up first token under mouse
hekeus@6: 	for (int i=0; i<numVoices;i++){
samer@25: 		if (voices[i]->isInVoice(x,y)) {
samer@25: 			voiceGrabbed=voices[i];
samer@25: 			break;
samer@25: 		}
hekeus@6: 	}
hekeus@6: }
hekeus@6: 
samer@22: void melodyTriangle::mouseReleased(int x, int y, int button){ 
samer@25: 	if (voiceGrabbed!=NULL) {
samer@25: 		Voice *v=voiceGrabbed;
samer@31: 		if (v->status==Voice::clear && v->truex>=0) {
samer@25: 			v->posx=v->truex;
samer@25: 			v->posy=v->truey;
samer@25: 			v->truex=v->truey=-1;
samer@25: 		}
samer@25: 		voiceGrabbed=NULL; 
samer@25: 	}
hekeus@6: }
hekeus@6: 
hekeus@6: //--------------------------------------------------------------
samer@22: 
hekeus@6: void melodyTriangle::windowResized(int w, int h){
samer@22: 	fitTriangleIn(w,h);
samer@37: 	sender << msgCalibrate();
samer@23: 	reset();
samer@22: }
hekeus@6: 
samer@23: void melodyTriangle::reset() {
samer@25: 	voiceGrabbed=NULL;
samer@23: 	for (int i=0;i<numVoices;i++) {
samer@23: 		Voice *v=voices[i];
samer@23: 		v->posx=x2+RADIUS+(numVoices-1-i)*36;
samer@23: 		v->posy=48;
samer@23: 		v->status=Voice::pending;
samer@25: 		v->isActive=true;
samer@23: 		if (v->inTriangle) {
samer@37: 			sender << msg("/death",v->id);
samer@23: 			v->inTriangle=false;
samer@23: 		}
samer@23: 	}
samer@23: }
samer@22: 
samer@22: // OSC Message handling -----------------------------------------
samer@22: 
samer@23: Voice *melodyTriangle::get_voice(int id) throw(bad_voice_id) {
samer@30: 	for (int i=0; i<numVoices; i++) {
samer@30: 		if (voices[i]->id==id) return voices[i];
samer@30: 	}
samer@30: 	throw bad_voice_id(id);
samer@23: }
samer@23: 
samer@22: void melodyTriangle::handleMessage(ofxOscMessage &m) {
samer@22: 	string msg_path=m.getAddress();
samer@23: 
samer@23: 	try {
samer@23: 		if (msg_path.compare(0,8,"/notify/")==0) {
samer@25: 			string msg=msg_path.substr(8);
samer@23: 			Voice *v=get_voice(m.getArgAsInt32(0));
samer@25: 			
samer@32: 			cout << "Received " << msg_path << "\n";
samer@25: 			if (msg=="requested") 	 v->status=Voice::waiting;
samer@25: 			else if (msg=="pending") v->status=Voice::pending;
samer@25: 			else if (msg=="received") {
samer@25: 				float x=m.getArgAsFloat(1);
samer@25: 				float y=m.getArgAsFloat(2);
samer@25: 				v->status=Voice::clear;
samer@31: 				if (snapTruePos) {
samer@31: 					if (voiceGrabbed==v) {
samer@31: 						v->truex=x;
samer@31: 						v->truey=y;
samer@31: 					} else {
samer@31: 						v->posx=x;
samer@31: 						v->posy=y;
samer@31: 						v->truex=v->truey=-1;
samer@31: 					}
samer@25: 				}
samer@31: 				printf("True position of %d: %4.1f, %4.1f\n",v->id,x,y);
samer@25: 			} else if (msg=="position") {
samer@23: 				int x=(int)m.getArgAsFloat(1);
samer@23: 				int y=(int)m.getArgAsFloat(2);
samer@23: 				v->posx=x;
samer@23: 				v->posy=y;
samer@23: 				v->inTriangle=!clipToTriangle(&x,&y);
samer@31: 				v->status=Voice::clear;
samer@25: 				if (voiceGrabbed==v) voiceGrabbed=NULL;
samer@25: 			} else if (msg=="running") {
samer@23: 				v->isActive  = m.getArgAsInt32(1) ? true : false;
samer@25: 			} else if (msg=="params") {
samer@23: 				v->octave    = m.getArgAsInt32(1);
samer@23: 				v->amplitude = m.getArgAsFloat(2);
samer@32: 			} else if (msg=="visible") {
samer@32: 				v->isVisible = m.getArgAsInt32(1);
samer@32: 				if (voiceGrabbed==v && !v->isVisible) 
samer@32: 					voiceGrabbed=NULL;
samer@23: 			}
samer@23: 		} else if (msg_path=="/display") {
samer@23: 			display_msg=m.getArgAsString(0);
samer@23: 			display_frames=m.getArgAsInt32(1);
samer@23: 		} else if (msg_path=="/font") {
samer@23: 			display_font.loadFont(m.getArgAsString(0),m.getArgAsInt32(1));
samer@30: 		} else if (msg_path=="/keyboard") { setKeyboardEnable(m.getArgAsInt32(0)); }
samer@23: 		else if (msg_path=="/reset")	  { reset(); } 
samer@23: 		else if (msg_path=="/fullscreen") { ofSetFullscreen(m.getArgAsInt32(0)); }
samer@23: 		else if (msg_path=="/quit")		  { ofAppGlutWindow::exitApp(); } 
samer@30: 		else if (msg_path=="/allowExit")  { allowExit=m.getArgAsInt32(0); }
samer@23: 		else {
samer@23: 			cout << m.getAddress();
samer@23: 			for (int i=0; i<m.getNumArgs(); i++) {
samer@23: 				cout << " " << m.getArgTypeName(i) << ":";
samer@23: 				switch (m.getArgType(i)) {
samer@23: 					case OFXOSC_TYPE_INT32:  cout << m.getArgAsInt32(i);
samer@23: 					case OFXOSC_TYPE_FLOAT:  cout << m.getArgAsFloat(i);
samer@23: 					case OFXOSC_TYPE_STRING: cout << m.getArgAsString(i);
samer@23: 					default: cout << "unknown";
samer@23: 				}
samer@23: 			}
samer@23: 			cout<< "\n";
samer@22: 		}
samer@23: 	} catch (std::exception &ex) {
samer@23: 		cout << "** Error processing OSC message: " << ex.what() << "\n";
samer@22: 	}
hekeus@6: }
samer@22: 
samer@30: void melodyTriangle::setKeyboardEnable(bool en) {
samer@30: 	enableKeys=en;
samer@31: 	snapTruePos=en;
samer@30: 	display_msg=en ? "Keyboard enabled" : "Keybard disabled";
samer@30: 	display_frames=40;
samer@30: }
samer@30: 
samer@22: // OSC Message sending -----------------------------------------
samer@22: 
samer@37: ofxOscMessage melodyTriangle::msgPosition(Voice *v){
samer@22: 	
samer@22: 	ofxOscMessage m;
samer@22: 	///track id x y left right top bottom area  
samer@22: 	m.setAddress( "/track2d" );
samer@23: 	m.addIntArg( v->id );
samer@23: 	m.addIntArg( v->posx );
samer@23: 	m.addIntArg( v->posy );
samer@37: 	// printf("/track2d %i %i %i\n",v->id,v->posx,v->posy);
samer@37: 	return m;
samer@22: }
samer@37: 
samer@37: ofxOscMessage melodyTriangle::msgCalibrate(){
samer@22: 	ofxOscMessage m;
samer@22: 	m.setAddress( "/calibrate" );
samer@22: 	m.addIntArg( x1 );
samer@22: 	m.addIntArg( y1 );
samer@22: 	m.addIntArg( x2 );
samer@22: 	m.addIntArg( y2 );
samer@22: 	m.addIntArg( x3 );
samer@22: 	m.addIntArg( y3 );
samer@37: 	printf("/calibrate %i %i %i %i %i %i\n",x1,y1,x2,y2,x3,y3);
samer@37: 	return m;
samer@22: }
samer@22: 
samer@37: ofxOscMessage melodyTriangle::msgReplyTo(){	
samer@22: 	ofxOscMessage m;
samer@22: 	m.setAddress( "/reply_to" );
samer@22: 	m.addIntArg( receivePort );
samer@22: 	printf("sent /reply_to %i\n",receivePort);
samer@37: 	return m;
samer@22: }
samer@22: 
samer@37: ofxOscMessage melodyTriangle::msgPeriod(int id, int num, int den) { return msg("/period",id,num,den); }
samer@37: ofxOscMessage melodyTriangle::msgShift(int id, int num, int den) { return msg("/shift",id,num,den); }
samer@37: ofxOscMessage melodyTriangle::msgOctave(int id, int oct) { return msg("/octave",id,oct); }
samer@22: 
samer@37: ofxOscMessage melodyTriangle::msgAmplitude(int id, float amp){
samer@22: 	ofxOscMessage m;
samer@22: 	m.setAddress("/amplitude");
samer@22: 	m.addIntArg(id);
samer@22: 	m.addFloatArg(amp);
samer@37: 	printf("/amplitude %i %1.3f\n",id,amp);
samer@37: 	return m;
samer@22: }
samer@22: 
samer@37: ofxOscMessage melodyTriangle::msg(const char *addr, int a, int b, int c) {
samer@32: 	ofxOscMessage m;
samer@32: 	m.setAddress(addr);
samer@32: 	m.addIntArg(a);
samer@32: 	m.addIntArg(b);
samer@32: 	m.addIntArg(c);
samer@37: 	printf("%s %i %i %i\n",addr,a,b,c);
samer@37: 	return m;
samer@32: }
samer@32: 
samer@37: ofxOscMessage melodyTriangle::msg(const char *addr, int a, int b) {
samer@32: 	ofxOscMessage m;
samer@32: 	m.setAddress(addr);
samer@32: 	m.addIntArg(a);
samer@32: 	m.addIntArg(b);
samer@37: 	printf("%s %i %i\n",addr,a,b);
samer@37: 	return m;
samer@32: }
samer@32: 
samer@37: ofxOscMessage melodyTriangle::msg(const char *addr, int a) {
samer@25: 	ofxOscMessage m;
samer@25: 	m.setAddress(addr);
samer@25: 	m.addIntArg(a);
samer@37: 	printf("%s %i\n",addr,a);
samer@37: 	return m;
samer@25: }
samer@25: 
samer@37: ofxOscMessage melodyTriangle::msg(const char *addr) {
samer@25: 	ofxOscMessage m;
samer@25: 	m.setAddress(addr);
samer@37: 	printf("%s\n",addr);
samer@37: 	return m;
samer@25: }
samer@22: 
samer@22: void melodyTriangle::fitTriangleIn(int width, int height) {
samer@22: 	int triHeight    = height*0.75;
samer@22: 	int triHalfWidth = triHeight/sqrt(3);
samer@22: 	
samer@22: 	x1=width/2;
samer@22: 	x2=x1-triHalfWidth;
samer@22: 	x3=x1+triHalfWidth;
samer@22: 	y1=(height-triHeight)/2;
samer@22: 	y2=y3=height - (height-triHeight)/2;
samer@22: 	
samer@22: 	// used for clipping
samer@22: 	DX13=x3-x1; DY13=y3-y1;
samer@22: 	SQLEN13=DX13*DX13+DY13*DY13;
samer@22: }
samer@23: 
samer@23: const char *melodyTriangle::bad_voice_id::what() const throw() { 
samer@23: 	std::stringstream out;
samer@23: 	printf("bad_voice_id(%d).\n",id);
samer@30: 	out << "Voice id " << id <<" not present.";
samer@23: 	return out.str().c_str();
samer@23: }