Source for gnu.javax.sound.sampled.gstreamer.lines.GstSourceDataLine

   1: /* GstSourceDataLine.java -- SourceDataLine implementation.
   2:  Copyright (C) 2007 Free Software Foundation, Inc.
   3: 
   4: This file is part of GNU Classpath.
   5: 
   6: GNU Classpath is free software; you can redistribute it and/or modify
   7: it under the terms of the GNU General Public License as published by
   8: the Free Software Foundation; either version 2, or (at your option)
   9: any later version.
  10: 
  11: GNU Classpath is distributed in the hope that it will be useful, but
  12: WITHOUT ANY WARRANTY; without even the implied warranty of
  13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14: General Public License for more details.
  15: 
  16: You should have received a copy of the GNU General Public License
  17: along with GNU Classpath; see the file COPYING.  If not, write to the
  18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19: 02110-1301 USA.
  20: 
  21: Linking this library statically or dynamically with other modules is
  22: making a combined work based on this library.  Thus, the terms and
  23: conditions of the GNU General Public License cover the whole
  24: combination.
  25: 
  26: As a special exception, the copyright holders of this library give you
  27: permission to link this library with independent modules to produce an
  28: executable, regardless of the license terms of these independent
  29: modules, and to copy and distribute the resulting executable under
  30: terms of your choice, provided that you also meet, for each linked
  31: independent module, the terms and conditions of the license of that
  32: module.  An independent module is a module which is not derived from
  33: or based on this library.  If you modify this library, you may extend
  34: this exception to your version of the library, but you are not
  35: obligated to do so.  If you do not wish to do so, delete this
  36: exception statement from your version. */
  37: 
  38: package gnu.javax.sound.sampled.gstreamer.lines;
  39: 
  40: import gnu.javax.sound.AudioSecurityManager;
  41: import gnu.javax.sound.sampled.gstreamer.lines.GstPipeline.State;
  42: 
  43: import javax.sound.sampled.AudioFormat;
  44: import javax.sound.sampled.LineUnavailableException;
  45: import javax.sound.sampled.SourceDataLine;
  46: 
  47: import static gnu.javax.sound.AudioSecurityManager.Permission;
  48: 
  49: public class GstSourceDataLine
  50:     extends GstDataLine implements SourceDataLine
  51: {
  52:   private GstPipeline pipeline = null;
  53:   private boolean open = false;
  54: 
  55:   public GstSourceDataLine(AudioFormat format)
  56:   {
  57:     super(format);
  58:   }
  59: 
  60:   public void open() throws LineUnavailableException
  61:   {
  62:     AudioSecurityManager.checkPermissions(Permission.PLAY);
  63: 
  64:     if (open)
  65:       throw new IllegalStateException("Line already opened");
  66: 
  67:     // create the pipeline
  68:     pipeline = GstNativeDataLine.createSourcePipeline(getBufferSize());
  69: 
  70:     this.open = true;
  71:   }
  72: 
  73:   public void open(AudioFormat fmt) throws LineUnavailableException
  74:   {
  75:     AudioSecurityManager.checkPermissions(Permission.PLAY);
  76: 
  77:     setFormat(fmt);
  78:     this.open();
  79:   }
  80: 
  81:   public void open(AudioFormat fmt, int size) throws LineUnavailableException
  82:   {
  83:     AudioSecurityManager.checkPermissions(Permission.PLAY);
  84: 
  85:     setBufferSize(size);
  86:     this.open(fmt);
  87:   }
  88: 
  89:   public int write(byte[] buf, int offset, int length)
  90:   {
  91:     return this.pipeline.write(buf, offset, length);
  92:   }
  93: 
  94:   public int available()
  95:   {
  96:     return this.pipeline.available();
  97:   }
  98: 
  99:   public void drain()
 100:   {
 101:     this.pipeline.drain();
 102:   }
 103: 
 104:   public void flush()
 105:   {
 106:     this.pipeline.flush();
 107:   }
 108: 
 109:   public int getFramePosition()
 110:   {
 111:     System.out.println("getFramePosition -: IMPLEMENT ME!!");
 112:     return 0;
 113:   }
 114: 
 115:   public long getLongFramePosition()
 116:   {
 117:     System.out.println("getLongFramePosition -: IMPLEMENT ME!!");
 118:     return 0;
 119:   }
 120: 
 121:   public long getMicrosecondPosition()
 122:   {
 123:     System.out.println("getMicrosecondPosition -: IMPLEMENT ME!!");
 124:     return 0;
 125:   }
 126: 
 127:   public boolean isActive()
 128:   {
 129:     State state = pipeline.getState();
 130:     return (state == State.PLAY || state == State.PAUSE);
 131:   }
 132: 
 133:   public void start()
 134:   {
 135:     pipeline.setState(State.PLAY);
 136:   }
 137: 
 138:   public void stop()
 139:   {
 140:     pipeline.setState(State.PAUSE);
 141:   }
 142: 
 143:   public void close()
 144:   {
 145:     pipeline.close();
 146:     this.open = false;
 147:   }
 148: 
 149:   public boolean isRunning()
 150:   {
 151:     return (pipeline.getState() == State.PLAY);
 152:   }
 153: }