1    package sound.audioDigitizer; 
2     
3    import gui.ClosableJFrame; 
4    import gui.run.RunSlider; 
5    import sound.OscopePanel; 
6    import sound.UlawCodec; 
7    import sound.Utils; 
8     
9    import javax.sound.sampled.AudioFileFormat; 
10   import javax.sound.sampled.AudioFormat; 
11   import javax.sound.sampled.AudioInputStream; 
12   import javax.sound.sampled.AudioSystem; 
13   import javax.sound.sampled.DataLine; 
14   import javax.sound.sampled.LineUnavailableException; 
15   import javax.sound.sampled.SourceDataLine; 
16   import javax.swing.BoxLayout; 
17   import javax.swing.JPanel; 
18   import java.awt.BorderLayout; 
19   import java.awt.Container; 
20   import java.awt.Dimension; 
21   import java.io.ByteArrayOutputStream; 
22   import java.io.IOException; 
23    
24   /** 
25    * DocJava, Inc. 
26    * http://www.docjava.com 
27    * Programmer: dlyon 
28    * Date: Dec 6, 2004 
29    * Time: 2:37:32 PM 
30    */ 
31   public class StreamingPlaybackThread 
32           extends Thread implements Runnable { 
33       SourceDataLine line; 
34       String errStr = null; 
35       AudioInputStream ais = null; 
36       private final int bufSize = 16384; 
37       CapturePlayBackPanel.FormatControls formatControls = null; 
38    
39       public StreamingPlaybackThread(AudioInputStream ais, 
40                                      CapturePlayBackPanel.FormatControls formatControls) { 
41           this.ais = ais; 
42           this.formatControls = formatControls; 
43           createControlPanel(); 
44       } 
45    
46       long delay = 100; 
47    
48       private void setDelay(long d) { 
49           delay = d; 
50       } 
51    
52       private long getDelay() { 
53           return delay; 
54       } 
55    
56       OscopePanel osp = new OscopePanel(); 
57    
58       private void createControlPanel() { 
59           System.out.println("createControlPanel was called"); 
60           ClosableJFrame cf = new ClosableJFrame(); 
61           Container c = cf.getContentPane(); 
62           JPanel jp = new JPanel() { 
63               public Dimension getPreferredSize() { 
64                   return new Dimension(100, 100); 
65               } 
66           }; 
67           jp.setLayout(new BoxLayout(jp, BoxLayout.PAGE_AXIS)); 
68           jp.add(new RunSlider() { 
69               public void run() { 
70                   setDelay(this.getValue() * 10000); 
71               } 
72           }); 
73           jp.add(new RunSlider() { 
74               public void run() { 
75                   setDelay(this.getValue() * 10000); 
76               } 
77           }); 
78           jp.add(new RunSlider() { 
79               public void run() { 
80                   setDelay(this.getValue() * 10000); 
81               } 
82           }); 
83           jp.add(new RunSlider() { 
84               public void run() { 
85                   setDelay(this.getValue() * 10000); 
86               } 
87           }); 
88           c.setLayout(new BorderLayout()); 
89           c.add(jp, BorderLayout.SOUTH); 
90           c.add(osp, BorderLayout.CENTER); 
91           cf.setSize(200, 200); 
92           cf.setVisible(true); 
93       } 
94    
95       private void shutDown(String message) { 
96           if ((errStr = message) != null) { 
97               System.err.println(errStr); 
98           } 
99       } 
100   
101      public static void printFormat(AudioFormat af) { 
102          System.out.println("--------"); 
103          System.out.println(af); 
104      } 
105   
106      public void run() { 
107          AudioFormat format = getAudioFormat(); 
108   
109          AudioInputStream playbackInputStream = AudioSystem.getAudioInputStream(format, ais); 
110          DataLine.Info info = new DataLine.Info(SourceDataLine.class, format); 
111          printFormat(format); 
112          try { 
113              line = (SourceDataLine) AudioSystem.getLine(info); 
114              line.open(format, bufSize); 
115          } catch (LineUnavailableException ex) { 
116              shutDown("Unable to open the line: " + ex); 
117          } 
118          // play back the captured audio data 
119   
120          int frameSizeInBytes = format.getFrameSize(); 
121          int bufferLengthInFrames = line.getBufferSize() / 8; 
122          int bufferLengthInBytes = bufferLengthInFrames * frameSizeInBytes; 
123          int numBytesRead = 0; 
124   
125          // start the source data line 
126          line.start(); 
127          while (true) { 
128              int n = (int) getDelay(); 
129              byte[] data = new byte[n]; 
130              try { 
131                  if ((numBytesRead = playbackInputStream.read(data)) == -1) { 
132                      // Thread.sleep(100); 
133                  } 
134                  int numBytesRemaining = numBytesRead; 
135                  processData(format, data, numBytesRemaining); 
136              } catch (Exception e) { 
137                  shutDown("Error during playback: " + e); 
138                  break; 
139              } 
140          } 
141          cleanUp(); 
142      } 
143   
144      private void processData(AudioFormat af, byte[] data, int numBytesRemaining) { 
145              final double[] doubleData = Utils.getDoubleData(af,data); 
146              osp.setData(doubleData); 
147              Utils.echo(1,1,doubleData); 
148      } 
149   
150      public static double[] getDoubleData(byte b[]) { 
151          UlawCodec ulc = new UlawCodec(b); 
152          return ulc.getDoubleArray(); 
153      } 
154   
155      private void cleanUp 
156              () { 
157          // we reached the end of the stream.  let the data play out, then 
158          // stop and close the line. 
159   
160          line.drain(); 
161          line.stop(); 
162          line.close(); 
163          line = null; 
164          shutDown(null); 
165      } 
166   
167      private AudioFormat getAudioFormat 
168              () { 
169          // make sure we have something to play 
170          if (ais == null) 
171              shutDown("No loaded audio to play back"); 
172   
173          // get an AudioInputStream of the desired format for playback 
174          AudioFormat format = formatControls.getFormat(); 
175          return format; 
176      } 
177  } 
178   
179