internal static string GetString(byte[] bytes, int start, int count, Id3TextEncoding encodingType)
{
Encoding encoding = GetEncoding(encodingType);
string str = encoding.GetString(bytes, start, count);
if (encodingType == Id3TextEncoding.Iso8859_1 && ShiftJisDetector.Detect(bytes, start, count))
{
var shiftJis = Encoding.GetEncoding(932);
str = shiftJis.GetString(bytes, start, count);
}
else
{
str = encoding.GetString(bytes, start, count);
}
if (encodingType == Id3TextEncoding.Unicode && str.Length > 0)
{
if (str[0] == '\xFFFE' || str[0] == '\xFEFF')
{
str = str.Remove(0, 1);
}
}
return(str);
}
internal static Encoding GetEncoding(Id3TextEncoding encodingType)
{
if (encodingType == Id3TextEncoding.Iso8859_1)
{
return(Encoding.GetEncoding("iso-8859-1"));
}
if (encodingType == Id3TextEncoding.Unicode)
{
return(Encoding.Unicode);
}
Debug.Assert(false, "Invalid Encoding type specified");
return(null);
}
private static int GetSplitterLength(Id3TextEncoding encodingType)
{
if (encodingType == Id3TextEncoding.Iso8859_1)
{
return(1);
}
if (encodingType == Id3TextEncoding.Unicode)
{
return(2);
}
Debug.Assert(false, "Invalid encoding type specified");
return(-1);
}
internal static string GetString(byte[] bytes, int start, int count, Id3TextEncoding encodingType)
{
Encoding encoding = GetEncoding(encodingType);
string str = encoding.GetString(bytes, start, count);
if (encodingType == Id3TextEncoding.Unicode)
{
if (str[0] == '\xFFFE' || str[0] == '\xFEFF')
{
str = str.Remove(0, 1);
}
}
return(str);
}
internal static string[] GetSplitStrings(byte[] bytes, int start, int count, Id3TextEncoding encodingType)
{
byte[][] splitBytes = ByteArrayHelper.SplitBySequence(bytes, start, count, GetSplitterBytes(encodingType));
if (splitBytes.Length == 0)
{
return new[] { string.Empty }
}
;
var strings = new string[splitBytes.Length];
for (int splitByteIdx = 0; splitByteIdx < splitBytes.Length; splitByteIdx++)
{
strings[splitByteIdx] = GetString(splitBytes[splitByteIdx], 0, splitBytes[splitByteIdx].Length, encodingType);
}
return(strings);
}
internal static byte[] GetSplitterBytes(Id3TextEncoding encodingType)
{
var splitterBytes = new byte[GetSplitterLength(encodingType)];
return(splitterBytes);
}
private static string ConvertEncoding(string convertedStr, byte[] input, Id3TextEncoding type)
{
switch (type)
{
case Id3TextEncoding.Unicode:
{
return convertedStr;
}
case Id3TextEncoding.Iso8859_1:
{
return Encoding.GetEncoding("windows-1251").GetString(input).Replace("\0", "");
}
}
return convertedStr;
}
