Filters/FilterMusic.cs

   1 //
   2 // FilterMusic.cs : This is the parent class of every audio tag-reading class
   3 //                  It will retreive the tag from the subclass, then fill the
   4 //                  beagle property as needed.
   5 //
   6 // Author:
   7 //              Raphaël Slinckx <raf.raf@wol.be>
   8 //
   9 // Copyright 2004 (C) Raphaël Slinckx
  10 //
  11
  12 //
  13 // Permission is hereby granted, free of charge, to any person obtaining a
  14 // copy of this software and associated documentation files (the "Software"),
  15 // to deal in the Software without restriction, including without limitation
  16 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
  17 // and/or sell copies of the Software, and to permit persons to whom the
  18 // Software is furnished to do so, subject to the following conditions:
  19 //
  20 // The above copyright notice and this permission notice shall be included in
  21 // all copies or substantial portions of the Software.
  22 //
  23 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  24 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  25 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  26 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  27 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  28 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  29 // DEALINGS IN THE SOFTWARE.
  30 //
  31
  32 using System;
  33 using System.IO;
  34 using Beagle.Util.AudioUtil;
  35
  36 namespace Beagle.Filters {
  37
  38         public abstract class FilterMusic : Beagle.Daemon.Filter {
  39
  40                 private static Beagle.Util.Logger log = Beagle.Util.Logger.Get ("FilterMusic");
  41
  42                 public FilterMusic ()
  43                 {
  44                         RegisterSupportedTypes ();
  45                 }
  46
  47                 protected abstract Tag GetTag (Stream s);
  48
  49                 protected abstract void RegisterSupportedTypes ();
  50
  51                 protected override void DoPullProperties ()
  52                 {
  53                         Tag tag = null;
  54                         try {
  55                                 tag = GetTag (Stream);
  56                         } catch (Exception e) {
  57                                 log.Debug ("Exception filtering music {0}: {1}", this.GetType (), e.Message);
  58                                 Finished();
  59                                 return;
  60                         }
  61
  62                         log.Debug ("{0}", tag);
  63
  64                         //FIXME: Do we need to check for non-null empty values ?
  65                         //This should be done in Beagle.Property.New I think..
  66
  67                         if (tag.Artist.Length > 0)
  68                                 AddProperty (Beagle.Property.New ("fixme:artist",  tag.Artist));
  69
  70                         if (tag.Album.Length > 0)
  71                                 AddProperty (Beagle.Property.New ("fixme:album",   tag.Album));
  72
  73                         if (tag.Title.Length > 0)
  74                                 AddProperty (Beagle.Property.New ("fixme:title",    tag.Title));
  75
  76                         if (tag.Comment.Length > 0)
  77                                 AddProperty (Beagle.Property.New ("fixme:comment", tag.Comment));
  78
  79                         if (tag.Track.Length > 0)
  80                                 AddProperty (Beagle.Property.NewKeyword ("fixme:tracknumber", tag.Track));
  81
  82                         if (tag.Year.Length > 0)
  83                                 AddProperty (Beagle.Property.NewKeyword ("fixme:year",  tag.Year));
  84
  85                         if (tag.Genre.Length > 0)
  86                                 AddProperty (Beagle.Property.NewKeyword ("fixme:genre", tag.Genre));
  87
  88                         /* TBA
  89                         if (info.HasPicture)
  90 -                               AddProperty (Beagle.Property.NewBool ("fixme:haspicture", true));
  91                         */
  92
  93                         Finished ();
  94                 }
  95         }
  96 }