How to have control on audio (wave file ), like pause, resume, forward, rewind

Hi all,

I’m developing audio mixer to play audio (wave files) and to have control on it.
I'm able to play and stop the audio with AudioInputStream and SourceDataLine. But unable to pause and resume the playing/running audio file. Sad

Can any on help me how to get the control on audio file like pause, resume and forward/rewind (5sec, 10sec,....). Embarrassed

.

I'm attaching the code, which I’m using for my application.

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179

/*
 * Created on Aug 5, 2005
 */
package Samples.audio;

import java.io.File;
import java.io.IOException;

import java.net.URL;

import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.SourceDataLine;
import javax.sound.sampled.UnsupportedAudioFileException;
import javax.sound.sampled.FloatControl;
/**
 * @author vinesh
 */
public class FoundationAudioStream 
   implements   Runnable{
      // better size
      private static final int   EXTERNAL_BUFFER_SIZE = 4000 * 4;

      private Thread            m_thread = null;
      private Object            m_dataSource;
      private AudioInputStream   m_audioInputStream;
      private SourceDataLine      m_sourceDataLine;
      public static long          lastMicrosecondPosition=0;
      public static long          currentMicrosecondPosition=0;
      
      private boolean          pauseFlag=false;
      private int             pauseCount;
      private int             bufferSize;
      private int             audioLength;            // Length of the sound.
      public static   int       audioPosition = 0;      // Current position within the sound
      /**   This variable is used to distinguish stopped state from paused state. */
      private boolean         m_bRunning;

      protected FoundationAudioStream()
      {
         m_dataSource = null;
         m_audioInputStream = null;
         m_sourceDataLine = null;
         m_gainControl = null;
         m_panControl = null;
      }

      protected void setDataSource(File file)
         throws   UnsupportedAudioFileException, LineUnavailableException, IOException
      {
         m_dataSource = file;
         initAudioInputStream();
      }

      private void initAudioInputStream()
         throws   UnsupportedAudioFileException, LineUnavailableException, IOException{
         if (m_dataSource instanceof File)initAudioInputStream((File) m_dataSource);
      }

      private void initAudioInputStream(File file)
         throws   UnsupportedAudioFileException, IOException{
            m_audioInputStream = AudioSystem.getAudioInputStream(file);
            bufferSize = (int)file.length();
      }

      protected void initLine()
         throws   LineUnavailableException{
         if (m_sourceDataLine == null){
            createLine();
            openLine();
         }else{
            AudioFormat   lineAudioFormat = m_sourceDataLine.getFormat();
            AudioFormat   audioInputStreamFormat = m_audioInputStream == null ? null : m_audioInputStream.getFormat();
            if (!lineAudioFormat.equals(audioInputStreamFormat)){
               m_sourceDataLine.close();
               openLine();
            }
         }
      }

      private void createLine()
         throws   LineUnavailableException{
         if (m_sourceDataLine != null)return;
         AudioFormat   audioFormat = m_audioInputStream.getFormat();
         DataLine.Info   info = 
            new DataLine.Info(SourceDataLine.class, audioFormat, AudioSystem.NOT_SPECIFIED);
         m_sourceDataLine = (SourceDataLine) AudioSystem.getLine(info);
         
         /** reseting the lastMicrosecondPosition for progress bar. */
         lastMicrosecondPosition=0;
      }

      private void openLine()
         throws   LineUnavailableException{
         if (m_sourceDataLine == null)return;
         AudioFormat   audioFormat = m_audioInputStream.getFormat();
         m_sourceDataLine.open(audioFormat, m_sourceDataLine.getBufferSize());
      }

      /** Start the audio */
      public void start()
      {
         if (!(m_thread == null || !m_thread.isAlive()))
               out("WARNING: old thread still running!!");
         m_thread = new Thread(this);
         m_thread.start();
         m_sourceDataLine.start();
      }

      /** Stop the audio. */
      protected void stop()
      {
         if (m_bRunning)
         {
            if (m_sourceDataLine != null)
            {
               lastMicrosecondPosition=m_sourceDataLine.getMicrosecondPosition();
               m_sourceDataLine.stop();
               m_sourceDataLine.flush();
            }
            m_bRunning = false;
            /**   We re-initialize the AudioInputStream. */
            try{
               initAudioInputStream();
            }catch (UnsupportedAudioFileException e){}
             catch (LineUnavailableException e){}
             catch (IOException e){}
         }
      }

      /** Pause the audio */
      public void pause(){
         m_sourceDataLine.stop();}

      /** Continue playing audio after pause */
      public void resume(){
         m_sourceDataLine.start();}

       /** Stop playing the audio and reset the position to 0 on progress bar */
       public void resetAudio( ) {
           stop( );
           audioPosition = 0; 
           TestAudioPlayer.songPerMillisecond.setValue(0);
       }
       
      public void run()
      {
         int   nBytesRead = 0;
         m_bRunning = true;
         byte[]   abData = new byte[EXTERNAL_BUFFER_SIZE];
         int currentCount=0;
         while (nBytesRead != -1 && m_bRunning)
         {
            try{
               nBytesRead = m_audioInputStream.read(abData, 0, abData.length);
            }catch (IOException e){
               e.printStackTrace();}
            if (nBytesRead >= 0 )
               int   nBytesWritten = m_sourceDataLine.write(abData, 0, nBytesRead);
         }
         /** for pause to lock the song played */
         if(pauseFlag)pauseCount=currentCount;
         m_sourceDataLine.drain();
         stop();

         /** Reset the progress bar position after audio is completed. */
         lastMicrosecondPosition=m_sourceDataLine.getMicrosecondPosition();
         if(!TestAudioPlayer.start.isEnabled())TestAudioPlayer.start.setEnabled(true);
         if(!TestAudioPlayer.select.isEnabled())TestAudioPlayer.select.setEnabled(true);
      }

      private static void out(String strMessage){
         System.out.println(strMessage);
      }

}

When I call pause method the audio will stop playing, but when I call resume method the audio will drain and stop playing. Sad

-vinesh