//Used for debugging.
// public static void ReadBytes(string Mp3Path, Encoding FileEncoding){
// Console.OutputEncoding = FileEncoding; //set the console output.
// byte[] MyMp3 = System.IO.File.ReadAllBytes(Mp3Path);
// string ByteFile = Hex.Dump(MyMp3); //Store Hex the Hex data from the Mp3 file.
// System.IO.File.WriteAllText("./Printouts/Mp3HexPrintout.txt", ByteFile); //Create a document containing Mp3 ByteFile (debugging).
// }
///Method ensures the mp3 file is encapsulated with the appropriate data.
///Does not alter existing meta data.
///Ensures the existence of an ApeTag item with the key: CloudCoinStack.
///Correct Apetag has a CloudCoinStack and StackName container.
public static TagLib.Ape.Tag CheckApeTag(TagLib.File Mp3File)
{
TagLib.Ape.Tag ApeTag;
bool hasCCS = false;
bool hasStackName = false;
// Pass a true parameter to the GetTag function in order to add one if the Mp3File doesn't already have a Mp3Tag.
// By passing a the parameter 'TagTypes.Ape' we ensure the type is of Ape.
try{
ApeTag = (TagLib.Ape.Tag)Mp3File.GetTag(TagLib.TagTypes.Ape, true);
hasCCS = ApeTag.HasItem("CloudCoinStack");
hasStackName = ApeTag.HasItem("StackName");
}
catch (Exception e)
{
Console.Out.WriteLine("The process failed: {0}", e.ToString());
ApeTag = (TagLib.Ape.Tag)Mp3File.GetTag(TagLib.TagTypes.Ape, false);
}
if (!hasCCS)
{
TagLib.Ape.Item item = new TagLib.Ape.Item("CloudCoinStack", "");
ApeTag.SetItem(item);
}
if (!hasStackName)
{
TagLib.Ape.Item itemName = new TagLib.Ape.Item("StackName", "");
ApeTag.SetItem(itemName);
}
return(ApeTag);
}
public Tag Read(Stream apeStream)
{
ApeTag tag = new ApeTag();
//Check wether the file contains an APE tag--------------------------------
apeStream.Seek( apeStream.Length - 32 , SeekOrigin.Begin);
byte[] b = new byte[8];
apeStream.Read(b, 0, b.Length);
string tagS = new string( System.Text.Encoding.ASCII.GetChars(b) );
if(tagS != "APETAGEX" ){
throw new CannotReadException("There is no APE Tag in this file");
}
//Parse the tag -)------------------------------------------------
//Version
b = new byte[4];
apeStream.Read( b , 0, b .Length);
int version = Utils.GetNumber(b, 0,3);
if(version != 2000) {
throw new CannotReadException("APE Tag other than version 2.0 are not supported");
}
//Size
b = new byte[4];
apeStream.Read( b , 0, b .Length);
long tagSize = Utils.GetLongNumber(b, 0,3);
//Number of items
b = new byte[4];
apeStream.Read( b , 0, b .Length);
int itemNumber = Utils.GetNumber(b, 0,3);
//Tag Flags
b = new byte[4];
apeStream.Read( b , 0, b .Length);
//TODO handle these
apeStream.Seek(apeStream.Length - tagSize, SeekOrigin.Begin);
for(int i = 0; i<itemNumber; i++) {
//Content length
b = new byte[4];
apeStream.Read( b , 0, b .Length);
int contentLength = Utils.GetNumber(b, 0,3);
if(contentLength > 500000)
throw new CannotReadException("Item size is much too large: "+contentLength+" bytes");
//Item flags
b = new byte[4];
apeStream.Read( b , 0, b .Length);
//TODO handle these
bool binary = ((b[0]&0x06) >> 1) == 1;
int j = 0;
while(apeStream.ReadByte() != 0)
j++;
apeStream.Seek(apeStream.Position - j -1, SeekOrigin.Begin);
int fieldSize = j;
//Read Item key
b = new byte[fieldSize];
apeStream.Read( b , 0, b .Length);
apeStream.Seek(1, SeekOrigin.Current);
string field = new string(System.Text.Encoding.GetEncoding("ISO-8859-1").GetChars(b));
//Read Item content
b = new byte[contentLength];
apeStream.Read( b , 0, b .Length);
if(!binary)
tag.Add(new ApeTagTextField(field, new string(System.Text.Encoding.UTF8.GetChars(b))));
else
tag.Add(new ApeTagBinaryField(field, b));
}
return tag;
}
