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/***************************************************************************
copyright : (C) 2005 by Brian Nickel
email : brian.nickel@gmail.com
***************************************************************************/
/***************************************************************************
* This library is free software; you can redistribute it and/or modify *
* it under the terms of the GNU Lesser General Public License version *
* 2.1 as published by the Free Software Foundation. *
* *
* This library is distributed in the hope that it will be useful, but *
* WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
* Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public *
* License along with this library; if not, write to the Free Software *
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 *
* USA *
***************************************************************************/
using System;
using System.Collections;
namespace TagLib.Asf
{
public class Tag : TagLib.Tag
{
//////////////////////////////////////////////////////////////////////////
// private properties
//////////////////////////////////////////////////////////////////////////
private ContentDescriptionObject description;
private ExtendedContentDescriptionObject ext_description;
//////////////////////////////////////////////////////////////////////////
// public methods
//////////////////////////////////////////////////////////////////////////
public Tag (HeaderObject header) : base ()
{
description = new ContentDescriptionObject ();
ext_description = new ExtendedContentDescriptionObject ();
foreach (Object child in header.Children)
{
if (child is ContentDescriptionObject)
description = (ContentDescriptionObject) child;
if (child is ExtendedContentDescriptionObject)
ext_description = (ExtendedContentDescriptionObject) child;
}
}
public void RemoveDescriptors (string name)
{
ext_description.RemoveDescriptors (name);
}
public ContentDescriptor [] GetDescriptors (string name)
{
return ext_description.GetDescriptors (name);
}
public void SetDescriptors (string name, params ContentDescriptor [] descriptors)
{
ext_description.SetDescriptors (name, descriptors);
}
public void AddDescriptor (ContentDescriptor descriptor)
{
ext_description.AddDescriptor (descriptor);
}
//////////////////////////////////////////////////////////////////////////
// public properties
//////////////////////////////////////////////////////////////////////////
public override string Title
{
get {return description.Title;}
set {description.Title = value;}
}
// This may seem unintuitive, but the artists field is actually
// performers. This makes sense as Artists should descibe the album
// artist and Performers should describe who is in the song.
// Because this may not be set, we'll return performers if we can't get
// an artist.
public override string [] Artists
{
get
{
string value = GetDescriptorString ("WM/AlbumArtist", "AlbumArtist");
return (value != null) ? SplitAndClean (value) : Performers;
}
set {SetDescriptorString (String.Join ("; ", value), "WM/AlbumArtist", "AlbumArtist");}
}
public override string [] Performers
{
get {return SplitAndClean (description.Author);}
set {description.Author = String.Join ("; ", value);}
}
public override string [] Composers
{
get {return SplitAndClean (GetDescriptorString ("WM/Composer", "Composer"));}
set {SetDescriptorString (String.Join ("; ", value), "WM/Composer", "Composer");}
}
public override string Album
{
get {return GetDescriptorString ("WM/AlbumTitle", "Album");}
set {SetDescriptorString (value, "WM/AlbumTitle", "Album");}
}
public override string Comment
{
get {return description.Description;}
set {description.Description = value;}
}
public override string [] Genres
{
get
{
string value = GetDescriptorString ("WM/Genre", "Genre");
return (value != null) ? SplitAndClean (value) : new string [] {};
}
set
{
SetDescriptorString (String.Join ("; ", value), "WM/Genre", "Genre");
}
}
public override uint Year
{
get
{
string value = GetDescriptorString ("WM/Year");
if (value != null)
try
{
return System.UInt32.Parse (value.Substring (0, 4));
}
catch {}
return 0;
}
set
{
SetDescriptorString (value.ToString (), "WM/Year");
}
}
public override uint Track
{
get
{
foreach (ContentDescriptor desc in GetDescriptors ("WM/TrackNumber"))
if (desc.ToDWord () != 0)
return desc.ToDWord ();
return 0;
}
set
{
SetDescriptors ("WM/TrackNumber", new ContentDescriptor ("WM/TrackNumber", value));
}
}
// This is not defined in the spec. If correct methods come along, correct.
public override uint TrackCount
{
get
{
foreach (ContentDescriptor desc in GetDescriptors ("TrackTotal"))
if (desc.ToDWord () != 0)
return desc.ToDWord ();
return 0;
}
set
{
SetDescriptors ("TrackTotal", new ContentDescriptor ("TrackTotal", value));
}
}
public override uint Disc
{
get
{
string value = GetDescriptorString ("WM/PartOfSet");
if (value != null)
try
{
return UInt32.Parse (value.Split (new char [] {'/'}) [0]);
}
catch {}
return 0;
}
set
{
uint count = DiscCount;
if (count != 0)
SetDescriptorString (value.ToString () + "/" + count.ToString (), "WM/PartOfSet");
else
SetDescriptorString (value.ToString (), "WM/PartOfSet");
}
}
public override uint DiscCount
{
get
{
string value = GetDescriptorString ("WM/PartOfSet");
if (value != null && value.IndexOf ('/') != -1)
try
{
return UInt32.Parse (value.Split (new char [] {'/'}) [1]);
}
catch {}
return 0;
}
set
{
SetDescriptorString (Disc.ToString () + "/" + value.ToString (), "WM/PartOfSet");
}
}
public ContentDescriptionObject ContentDescriptionObject {get {return description;}}
public ExtendedContentDescriptionObject ExtendedContentDescriptionObject {get {return ext_description;}}
public string GetDescriptorString (params string [] names)
{
foreach (string name in names)
{
foreach (ContentDescriptor desc in GetDescriptors (name))
if (desc != null && desc.Type == DataType.Unicode && desc.ToString () != null)
return desc.ToString ();
}
return null;
}
public void SetDescriptorString (string value, params string [] names)
{
int i = (value != null && value.Trim () != "") ? 1 : 0;
if (i == 1)
SetDescriptors (names [0], new ContentDescriptor (names [0], value));
for (; i < names.Length; i ++)
RemoveDescriptors (names [i]);
}
public override IPicture [] Pictures
{
get
{
ArrayList l = new ArrayList ();
foreach (ContentDescriptor descriptor in GetDescriptors ("WM/Picture"))
{
ByteVector data = descriptor.ToByteVector ();
Picture p = new Picture ();
if (data.Count < 9)
continue;
int offset = 0;
p.Type = (PictureType) data [0];
offset += 1;
int size = (int) data.Mid (offset, 4).ToUInt (false);
offset += 4;
int found = data.Find ("\0\0", offset, 2);
if (found == -1)
continue;
p.MimeType = data.Mid (offset, found - offset).ToString (StringType.UTF16LE);
offset = found + 2;
found = data.Find ("\0\0", offset, 2);
if (found == -1)
continue;
p.Description = data.Mid (offset, found - offset).ToString (StringType.UTF16LE);
offset = found + 2;
p.Data = data.Mid (offset, size);
l.Add (p);
}
return (Picture []) l.ToArray (typeof (Picture));
}
set
{
if (value == null || value.Length == 0)
{
RemoveDescriptors ("WM/Picture");
return;
}
ContentDescriptor [] descriptors = new ContentDescriptor [value.Length];
for (int i = 0; i < value.Length; i ++)
{
ByteVector v = new ByteVector ();
v.Add ((byte) value [i].Type);
v.Add (Object.RenderDWord ((uint) value [i].Data.Count));
v.Add (Object.RenderUnicode (value [i].MimeType));
v.Add (Object.RenderUnicode (value [i].Description));
v.Add (value [i].Data);
descriptors [i] = new ContentDescriptor ("WM/Picture", v);
}
SetDescriptors ("WM/Picture", descriptors);
}
}
//////////////////////////////////////////////////////////////////////////
// private methods
//////////////////////////////////////////////////////////////////////////
private string [] SplitAndClean (string s)
{
if (s == null || s.Trim () == "")
return new string [] {};
StringList l = StringList.Split (s, ";");
for (int i = 0; i < l.Count; i ++)
l [i] = l [i].Trim ();
return l.ToArray ();
}
}
}
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