private static ContentsDescriptionObject ReadContentsDescriptionObject(Stream strm, int offset = 0)
{
byte[] buf = new byte[18];
strm.Read(buf, offset, 18);
ContentsDescriptionObject cd = new ContentsDescriptionObject();
cd.size = BitConverter.ToUInt64(buf, 0);
cd.title_length = BitConverter.ToUInt16(buf, 8);
cd.artist_length = BitConverter.ToUInt16(buf, 8 + 2);
cd.copy_length = BitConverter.ToUInt16(buf, 8 + 2 + 2);
cd.description_length = BitConverter.ToUInt16(buf, 8 + 2 + 2 + 2);
cd.rating_length = BitConverter.ToUInt16(buf, 8 + 2 + 2 + 2 + 2);
byte[] buf_body = new byte[cd.size - 18 - 16];
strm.Read(buf_body, offset, buf_body.Length);
if (cd.title_length > 0)
{
cd.title = Encoding.Unicode.GetString(buf_body, 0, cd.title_length - 2);
}
if (cd.artist_length > 0)
{
cd.artist = Encoding.Unicode.GetString(buf_body, cd.title_length, cd.artist_length - 2);
}
if (cd.copy_length > 0)
{
cd.copyright = Encoding.Unicode.GetString(buf_body, cd.title_length + cd.artist_length, cd.copy_length - 2);
}
if (cd.description_length > 0)
{
cd.description = Encoding.Unicode.GetString(buf_body, cd.title_length + cd.artist_length + cd.copy_length, cd.description_length - 2);
}
if (cd.rating_length > 0)
{
cd.rating = Encoding.Unicode.GetString(buf_body, cd.title_length + cd.artist_length + cd.copy_length + cd.description_length, cd.rating_length - 2);
}
return(cd);
}
public static List <KeyValuePair <string, object> > Read(Stream stream, bool createImageObject)
{
var header = new HeaderObject();
Guid guid = ReadGuid(stream);
if (!guid.Equals(GUID_HEADER_OBJECT))
{
return(null);
}
var buf = new byte[14];
stream.Read(buf, 0, 14);
header.size = BitConverter.ToUInt64(buf, 0);
header.count = BitConverter.ToUInt32(buf, 8);
List <KeyValuePair <string, object> > ecd = null;
List <KeyValuePair <string, object> > heo = null;
ContentsDescriptionObject cd = default(ContentsDescriptionObject);
for (int i = 0; i < header.count; i++)
{
var guid_sub = ReadGuid(stream, 0);
Logger.Debug(guid_sub.ToString() + " , " + stream.Position);
if (guid_sub.Equals(GUID_CONTENTS_DESCRIPTION_OBJECT))
{
cd = ReadContentsDescriptionObject(stream, 0);
}
else if (guid_sub.Equals(GUID_EXTENDED_CONTENTS_DESCRIPTION_OBJECT))
{
ecd = ReadExtendedContentsDescriptionObject(stream, 0);
}
else if (guid_sub.Equals(GUID_HEADER_EXTENSION_OBJECT))
{
heo = ReadHeaderExtensionObject(stream, 0);
}
else
{
byte[] buf_size = new byte[8];
stream.Read(buf_size, 0, 8);
stream.Seek((long)BitConverter.ToUInt64(buf_size, 0) - 16 - 8, SeekOrigin.Current);
}
}
if (ecd != null)
{
if (ecd.Find((e) => e.Key == "TITLE").Key == null && !String.IsNullOrEmpty(cd.title))
{
ecd.Add(new KeyValuePair <string, object>("TITLE", cd.title));
}
if (ecd.Find((e) => e.Key == "ARTIST").Key == null && !String.IsNullOrEmpty(cd.artist))
{
ecd.Add(new KeyValuePair <string, object>("ARTIST", cd.artist));
}
if (ecd.Find((e) => e.Key == "COMMENT").Key == null && !String.IsNullOrEmpty(cd.description))
{
ecd.Add(new KeyValuePair <string, object>("COMMENT", cd.description));
}
if (heo != null)
{
ecd.AddRange(heo);
}
return(ecd);
}
else
{
var tag = new List <KeyValuePair <string, object> >();
if (cd.title != null)
{
tag.Add(new KeyValuePair <string, object>("TITLE", cd.title));
}
if (cd.artist != null)
{
tag.Add(new KeyValuePair <string, object>("ARTIST", cd.artist));
}
if (cd.description != null)
{
tag.Add(new KeyValuePair <string, object>("COMMENT", cd.description));
}
return(tag);
}
}
