Source for gnu.javax.sound.sampled.gstreamer.GStreamerMixer

   1: /* GStreamerMixer.java -- Mixer implementation.
   2:  Copyright (C) 2007, 2012 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;
  39: 
  40: import gnu.javax.sound.sampled.gstreamer.lines.GstSourceDataLine;
  41: 
  42: import javax.sound.sampled.AudioFormat;
  43: import javax.sound.sampled.Control;
  44: import javax.sound.sampled.DataLine;
  45: import javax.sound.sampled.Line;
  46: import javax.sound.sampled.LineListener;
  47: import javax.sound.sampled.LineUnavailableException;
  48: import javax.sound.sampled.Mixer;
  49: import javax.sound.sampled.SourceDataLine;
  50: import javax.sound.sampled.Control.Type;
  51: 
  52: /**
  53:  * @author Mario Torre <neugens@limasoftware.net>
  54:  */
  55: public class GStreamerMixer
  56:     implements Mixer
  57: {
  58:   public static class GstInfo extends Info
  59:   {
  60:     /* Mixer Properties */
  61: 
  62:     /** Name */
  63:     private static final String name = "Classpath GStreamer Sound Audio Engine";
  64: 
  65:     /** Vendor */
  66:     private static final String vendor = "GNU Classpath";
  67: 
  68:     /** Description */
  69:     private static final String desc = "GStreamer-based software mixer";
  70: 
  71:     /** Version */
  72:     private static final String vers = "0.0.1";
  73: 
  74:     protected GstInfo()
  75:     {
  76:       super(name, vendor, desc, vers);
  77:     }
  78:   }
  79: 
  80:   public static final String GST_BACKEND = GstInfo.name;
  81:   public static final String GST_DECODER = "decoder";
  82:   public static final String GST_TYPE_NAME = "type";
  83:   public static final String GST_FILE_EXTENSION = "ext";
  84: 
  85:   /** Mixer Info */
  86:   private static final Mixer.Info INFO = new GStreamerMixer.GstInfo();
  87: 
  88:   public Line getLine(Line.Info info)
  89:       throws LineUnavailableException
  90:   {
  91:     // get all the lines formats supported by this mixer and
  92:     // and see if there is one matching the given line
  93:     // if the format comes from the gstreamer backend
  94:     // gstreamer will be able to deal with it
  95:     Class<?> clazz = info.getLineClass();
  96:     DataLine.Info _info = (DataLine.Info) info;
  97: 
  98:     if (clazz == SourceDataLine.class)
  99:       {
 100:         for (AudioFormat format : _info.getFormats())
 101:           {
 102:             // see if we are a gstreamer child :)
 103:             if (format.properties().containsKey(GST_BACKEND));
 104:               {
 105:                 // we got it
 106:                 return new GstSourceDataLine(format);
 107:               }
 108:           }
 109:       }
 110: 
 111:     // TODO: we also support basic PCM
 112: 
 113:     throw new LineUnavailableException("Cannot open a line");
 114:   }
 115: 
 116:   public int getMaxLines(Line.Info info)
 117:   {
 118:     // TODO
 119:     return 1;
 120:   }
 121: 
 122:   public Info getMixerInfo()
 123:   {
 124:     return INFO;
 125:   }
 126: 
 127:   public javax.sound.sampled.Line.Info[] getSourceLineInfo()
 128:   {
 129:     // TODO Auto-generated method stub
 130:     return null;
 131:   }
 132: 
 133:   public Line.Info[] getSourceLineInfo(Line.Info info)
 134:   {
 135:     // TODO Auto-generated method stub
 136:     return null;
 137:   }
 138: 
 139:   public Line[] getSourceLines()
 140:   {
 141:     // TODO Auto-generated method stub
 142:     return null;
 143:   }
 144: 
 145:   public javax.sound.sampled.Line.Info[] getTargetLineInfo()
 146:   {
 147:     // TODO Auto-generated method stub
 148:     return null;
 149:   }
 150: 
 151:   public Line.Info[] getTargetLineInfo(Line.Info info)
 152:   {
 153:     // TODO Auto-generated method stub
 154:     return null;
 155:   }
 156: 
 157:   public Line[] getTargetLines()
 158:   {
 159:     // TODO Auto-generated method stub
 160:     return null;
 161:   }
 162: 
 163:   public boolean isLineSupported(Line.Info info)
 164:   {
 165:     // We support any kind of mixer that comes
 166:     // from our gstreamer backend.
 167:     // In addition, we support PCM based audio streams for
 168:     // direct playback.
 169:     if (info instanceof DataLine.Info)
 170:       {
 171:         DataLine.Info _dinfo = (DataLine.Info) info;
 172:         _dinfo.getFormats();
 173:       }
 174: 
 175:     return true;
 176:   }
 177: 
 178:   public boolean isSynchronizationSupported(Line[] lines, boolean sync)
 179:   {
 180:     // TODO Auto-generated method stub
 181:     return false;
 182:   }
 183: 
 184:   public void synchronize(Line[] lines, boolean sync)
 185:   {
 186:     // TODO Auto-generated method stub
 187: 
 188:   }
 189: 
 190:   public void unsynchronize(Line[] lines)
 191:   {
 192:     // TODO Auto-generated method stub
 193: 
 194:   }
 195: 
 196:   public void addLineListener(LineListener listener)
 197:   {
 198:     // TODO Auto-generated method stub
 199: 
 200:   }
 201: 
 202:   public void close()
 203:   {
 204:     // TODO Auto-generated method stub
 205: 
 206:   }
 207: 
 208:   public Control getControl(Type what)
 209:   {
 210:     // TODO Auto-generated method stub
 211:     return null;
 212:   }
 213: 
 214:   public Control[] getControls()
 215:   {
 216:     // TODO Auto-generated method stub
 217:     return null;
 218:   }
 219: 
 220:   public javax.sound.sampled.Line.Info getLineInfo()
 221:   {
 222:     // TODO Auto-generated method stub
 223:     return null;
 224:   }
 225: 
 226:   public boolean isControlSupported(Type what)
 227:   {
 228:     // TODO Auto-generated method stub
 229:     return false;
 230:   }
 231: 
 232:   public boolean isOpen()
 233:   {
 234:     // TODO Auto-generated method stub
 235:     return false;
 236:   }
 237: 
 238:   public void open() throws LineUnavailableException
 239:   {
 240:     // TODO Auto-generated method stub
 241: 
 242:   }
 243: 
 244:   public void removeLineListener(LineListener listener)
 245:   {
 246:     // TODO Auto-generated method stub
 247:   }
 248: }