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/***************************************************************************
copyright : (C) 2005 by Brian Nickel
email : brian.nickel@gmail.com
based on : id3v2frame.cpp from TagLib
***************************************************************************/
/***************************************************************************
* 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;
namespace TagLib.Asf
{
public enum DataType
{
Unicode = 0,
Bytes = 1,
Bool = 2,
DWord = 3,
QWord = 4,
Word = 5
}
public class ContentDescriptor
{
//////////////////////////////////////////////////////////////////////////
// private properties
//////////////////////////////////////////////////////////////////////////
private DataType type;
private string name;
private string sValue;
private ByteVector bvValue;
private long lValue;
//////////////////////////////////////////////////////////////////////////
// public methods
//////////////////////////////////////////////////////////////////////////
public ContentDescriptor (string name, string value) : this ()
{
this.name = name;
this.type = DataType.Unicode;
this.sValue = value;
}
public ContentDescriptor (string name, ByteVector value) : this ()
{
this.name = name;
this.type = DataType.Bytes;
this.bvValue = new ByteVector (value);
}
public ContentDescriptor (string name, uint value) : this ()
{
this.name = name;
this.type = DataType.DWord;
this.lValue = value;
}
public ContentDescriptor (string name, long value) : this ()
{
this.name = name;
this.type = DataType.QWord;
this.lValue = value;
}
public ContentDescriptor (string name, short value) : this ()
{
this.name = name;
this.type = DataType.Word;
this.lValue = value;
}
public ContentDescriptor (string name, bool value) : this ()
{
this.name = name;
this.type = DataType.Bool;
this.lValue = value ? 1 : 0;
}
public string Name {get {return name;}}
public DataType Type {get {return type;}}
public override string ToString ()
{
return sValue;
}
public ByteVector ToByteVector ()
{
return bvValue;
}
public bool ToBool ()
{
return lValue != 0;
}
public uint ToDWord ()
{
if (type == DataType.Unicode && sValue != null)
try
{
return System.UInt32.Parse (sValue);
}
catch {}
return (uint) lValue;
}
public long ToQWord ()
{
if (type == DataType.Unicode && sValue != null)
try
{
return System.Int64.Parse (sValue);
}
catch {}
return (long) lValue;
}
public short ToWord ()
{
if (type == DataType.Unicode && sValue != null)
try
{
return System.Int16.Parse (sValue);
}
catch {}
return (short) lValue;
}
public ByteVector Render ()
{
ByteVector v = Object.RenderUnicode (name);
ByteVector data = Object.RenderWord ((short) v.Count) + v + Object.RenderWord ((short) type);
switch (type)
{
case DataType.Unicode:
v = Object.RenderUnicode (sValue);
data += Object.RenderWord ((short) v.Count) + v;
break;
case DataType.Bytes:
data.Add (Object.RenderWord ((short) bvValue.Count));
data.Add (bvValue);
break;
case DataType.Bool:
data.Add (Object.RenderWord (4));
data.Add (Object.RenderDWord ((uint) lValue));
break;
case DataType.DWord:
data.Add (Object.RenderWord (4));
data.Add (Object.RenderDWord ((uint) lValue));
break;
case DataType.QWord:
data.Add (Object.RenderWord (8));
data.Add (Object.RenderQWord (lValue));
break;
case DataType.Word:
data.Add (Object.RenderWord (2));
data.Add (Object.RenderWord ((short) lValue));
break;
default:
return null;
}
return data;
}
//////////////////////////////////////////////////////////////////////////
// protected methods
//////////////////////////////////////////////////////////////////////////
protected ContentDescriptor ()
{
type = DataType.Unicode;
name = null;
sValue = null;
bvValue = null;
lValue = 0;
}
protected internal ContentDescriptor (Asf.File file) : this ()
{
Parse (file);
}
protected bool Parse (Asf.File file)
{
int size = file.ReadWord ();
name = file.ReadUnicode (size);
type = (DataType) file.ReadWord ();
size = file.ReadWord ();
switch (type)
{
case DataType.Word:
lValue = file.ReadWord ();
break;
case DataType.Bool:
lValue = file.ReadDWord ();
break;
case DataType.DWord:
lValue = file.ReadDWord ();
break;
case DataType.QWord:
lValue = file.ReadQWord ();
break;
case DataType.Unicode:
sValue = file.ReadUnicode (size);
break;
case DataType.Bytes:
bvValue = file.ReadBlock (size);
break;
default:
return false;
}
return true;
}
}
}
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