001 package com.croftsoft.apps.midi;
002
003 import java.applet.*;
004 import java.awt.*;
005 import java.awt.event.*;
006 import java.awt.geom.*;
007 import java.io.*;
008 import java.net.URL;
009 import java.util.*;
010 import javax.sound.midi.*;
011 import javax.swing.*;
012 import javax.swing.event.*;
013
014 import com.croftsoft.core.animation.*;
015 import com.croftsoft.core.animation.animator.*;
016 import com.croftsoft.core.animation.painter.*;
017 import com.croftsoft.core.io.SerializableLib;
018 import com.croftsoft.core.jnlp.JnlpLib;
019 import com.croftsoft.core.lang.lifecycle.*;
020
021 /*********************************************************************
022 * MIDI demo.
023 *
024 * @version
025 * 2003-04-12
026 * @since
027 * 2003-04-12
028 * @author
029 * <a href="https://www.croftsoft.com/">David Wallace Croft</a>
030 *********************************************************************/
031
032 public final class Main
033 extends AnimatedApplet
034 //////////////////////////////////////////////////////////////////////
035 //////////////////////////////////////////////////////////////////////
036 {
037
038 private static final String VERSION
039 = "2003-04-12";
040
041 private static final String TITLE
042 = "CroftSoft MIDI";
043
044 private static final String APPLET_INFO
045 = "\n" + TITLE + "\n"
046 + "Copyright 2003 CroftSoft Inc\n"
047 + "https://www.croftsoft.com/\n"
048 + "Version " + VERSION + "\n"
049 + "Licensed under the Academic Free License version 1.2\n";
050
051 //////////////////////////////////////////////////////////////////////
052 // frame constants
053 //////////////////////////////////////////////////////////////////////
054
055 private static final String FRAME_TITLE
056 = TITLE;
057
058 private static final String FRAME_ICON_FILENAME
059 = "/images/croftsoft.png";
060
061 private static final Dimension FRAME_SIZE
062 = null;
063
064 private static final String SHUTDOWN_CONFIRMATION_PROMPT
065 = "Close " + TITLE + "?";
066
067 //////////////////////////////////////////////////////////////////////
068 // animation constants
069 //////////////////////////////////////////////////////////////////////
070
071 /** frames per second */
072 private static final double FRAME_RATE = 30.0;
073
074 private static final Color BACKGROUND_COLOR
075 = Color.BLACK;
076
077 private static final Color FOREGROUND_COLOR
078 = Color.BLUE;
079
080 private static final Font FONT
081 = new Font ( "Arioso", Font.BOLD, 20 );
082
083 private static final Cursor CURSOR
084 = new Cursor ( Cursor.CROSSHAIR_CURSOR );
085
086 private static final long DELAY = 2000;
087
088 private static int DELTA_X = 1;
089
090 private static int DELTA_Y = 1;
091
092 private static String SOUNDBANK_URL_NAME
093 = "http://java.sun.com/products/java-media/sound/soundbanks.html";
094
095 //////////////////////////////////////////////////////////////////////
096 // persistence constants
097 //////////////////////////////////////////////////////////////////////
098
099
100 //////////////////////////////////////////////////////////////////////
101 // instance variables
102 //////////////////////////////////////////////////////////////////////
103
104 private Sequencer sequencer;
105
106 private Synthesizer synthesizer;
107
108 private Instrument [ ] instruments;
109
110 private MidiChannel [ ] midiChannels;
111
112 private int noteNumber;
113
114 private long previousTime;
115
116 private boolean noteOn;
117
118 private TextAnimator textAnimator;
119
120 private Random random;
121
122 private boolean started;
123
124 //////////////////////////////////////////////////////////////////////
125 //////////////////////////////////////////////////////////////////////
126
127 public static void main ( String [ ] args )
128 //////////////////////////////////////////////////////////////////////
129 {
130 if ( args.length < 1 )
131 {
132 launch ( new Main ( ) );
133
134 return;
135 }
136
137 // Test of playing a MIDI file using AudioClip
138
139 AudioClip audioClip = Applet.newAudioClip (
140 Main.class.getClassLoader ( ).getResource ( args [ 0 ] ) );
141
142 audioClip.loop ( );
143 }
144
145 private static AnimationInit createAnimationInit ( )
146 //////////////////////////////////////////////////////////////////////
147 {
148 AnimationInit animationInit = new AnimationInit ( );
149
150 animationInit.setAppletInfo ( APPLET_INFO );
151
152 animationInit.setForegroundColor ( BACKGROUND_COLOR );
153
154 animationInit.setCursor ( CURSOR );
155
156 animationInit.setFont ( FONT );
157
158 animationInit.setForegroundColor ( FOREGROUND_COLOR );
159
160 animationInit.setFrameIconFilename ( FRAME_ICON_FILENAME );
161
162 animationInit.setFrameSize ( FRAME_SIZE );
163
164 animationInit.setFrameTitle ( FRAME_TITLE );
165
166 animationInit.setShutdownConfirmationPrompt (
167 SHUTDOWN_CONFIRMATION_PROMPT );
168
169 return animationInit;
170 }
171
172 //////////////////////////////////////////////////////////////////////
173 //////////////////////////////////////////////////////////////////////
174
175 public Main ( )
176 //////////////////////////////////////////////////////////////////////
177 {
178 super ( createAnimationInit ( ) );
179 }
180
181 //////////////////////////////////////////////////////////////////////
182 // interface Lifecycle methods
183 //////////////////////////////////////////////////////////////////////
184
185 public void init ( )
186 //////////////////////////////////////////////////////////////////////
187 {
188 super.init ( );
189
190 // persistent data
191
192 /*
193 try
194 {
195 userData = ( UserData ) SerializableLib.load (
196 LATEST_FILENAME,
197 BACKUP_FILENAME,
198 FILE_CONTENTS_SPEC,
199 ( Applet ) this,
200 PERSISTENCE_KEY,
201 getClass ( ).getClassLoader ( ),
202 RESOURCE_PATH_FILENAME );
203 }
204 catch ( Exception ex )
205 {
206 ex.printStackTrace ( );
207 }
208
209 if ( userData == null )
210 {
211 userData = new UserData ( );
212 }
213 */
214 addComponentPainter ( new ColorPainter ( BACKGROUND_COLOR ) );
215
216 textAnimator = new TextAnimator ( );
217
218 textAnimator.setText ( TITLE );
219
220 textAnimator.setDeltaX ( DELTA_X );
221
222 textAnimator.setDeltaY ( DELTA_Y );
223
224 addComponentAnimator ( textAnimator );
225
226 random = new Random ( );
227
228 try
229 {
230 sequencer = MidiSystem.getSequencer ( );
231
232 synthesizer = MidiSystem.getSynthesizer ( );
233
234 synthesizer.open ( );
235
236 Soundbank soundbank = synthesizer.getDefaultSoundbank ( );
237
238 if ( soundbank != null )
239 {
240 System.out.println ( "Using soundbank instruments..." );
241
242 instruments = soundbank.getInstruments ( );
243 }
244 else
245 {
246 System.out.println ( "Using synthesizer instruments..." );
247
248 instruments = synthesizer.getAvailableInstruments ( );
249 }
250
251 midiChannels = synthesizer.getChannels ( );
252
253 if ( instruments.length < 1 )
254 {
255 textAnimator.setText ( SOUNDBANK_URL_NAME );
256
257 URL soundbankURL = new URL ( SOUNDBANK_URL_NAME );
258
259 try
260 {
261 getAppletContext ( ).showDocument ( soundbankURL, "_blank" );
262 }
263 catch ( Exception ex )
264 {
265 try
266 {
267 JnlpLib.showDocument ( soundbankURL );
268 }
269 catch ( Exception ex2 )
270 {
271 }
272 }
273 }
274 }
275 catch ( Exception ex )
276 {
277 ex.printStackTrace ( );
278
279 throw new InitializationException ( ex );
280 }
281 }
282
283 public void update ( JComponent component )
284 //////////////////////////////////////////////////////////////////////
285 {
286 super.update ( component );
287
288 if ( !started
289 || instruments.length < 1 )
290 {
291 return;
292 }
293
294 if ( noteOn )
295 {
296 long currentTime = System.currentTimeMillis ( );
297
298 if ( previousTime + DELAY >= currentTime )
299 {
300 return;
301 }
302
303 previousTime = currentTime;
304
305 midiChannels [ 0 ].noteOff ( noteNumber );
306
307 noteOn = false;
308 }
309 else
310 {
311 noteNumber = random.nextInt ( 128 );
312
313 int instrumentIndex = random.nextInt ( instruments.length );
314
315 Instrument instrument = instruments [ instrumentIndex ];
316
317 textAnimator.setText (
318 instrument.getName ( ) + " " + noteNumber );
319
320 synthesizer.loadInstrument ( instrument );
321
322 midiChannels [ 0 ].programChange ( instrumentIndex );
323
324 int velocity = 64;
325
326 midiChannels [ 0 ].noteOn ( noteNumber, velocity );
327
328 noteOn = true;
329 }
330 }
331
332 public void start ( )
333 //////////////////////////////////////////////////////////////////////
334 {
335 started = true;
336
337 super.start ( );
338 }
339
340 public void stop ( )
341 //////////////////////////////////////////////////////////////////////
342 {
343 started = false;
344
345 if ( noteOn )
346 {
347 midiChannels [ 0 ].noteOff ( noteNumber );
348
349 noteOn = false;
350 }
351
352 super.stop ( );
353 }
354
355 public void destroy ( )
356 //////////////////////////////////////////////////////////////////////
357 {
358 synthesizer.close ( );
359
360 sequencer.close ( );
361
362 /*
363 try
364 {
365 SerializableLib.save (
366 userData,
367 LATEST_FILENAME,
368 BACKUP_FILENAME,
369 FILE_CONTENTS_SPEC,
370 ( Applet ) this,
371 PERSISTENCE_KEY );
372 }
373 catch ( Exception ex )
374 {
375 ex.printStackTrace ( );
376 }
377 */
378
379 super.destroy ( );
380 }
381
382 //////////////////////////////////////////////////////////////////////
383 //////////////////////////////////////////////////////////////////////
384 }