/// <summary>
/// Parses the ID3 Header Frames from an MP3
/// </summary>
/// <returns></returns>
public Song parseHeader(Stream fileStream)
{
int idHeaderSize;
Song song = new Song();
UTF8Encoding encoder = new UTF8Encoding();
byte[] idHeader = new byte[10];
fileStream.Read(idHeader, 0, 10);
//Parse to String and compare with expected magic:
if (encoder.GetString(idHeader).Substring(0, 3).Equals("ID3"))
{
byte[] idSize = new byte[4];
Array.Copy(idHeader, 6, idSize, 0, 4);
idHeaderSize = ReadSynchsafeInt32(idSize, 0)+10;
while (fileStream.Position < idHeaderSize)
{
//Store all frame data:
byte[] frameData = new byte[10];
fileStream.Read(frameData, 0, 10);
//Get the name:
byte[] bFrameID = new byte[4];
Array.Copy(frameData, 0, bFrameID, 0, bFrameID.Length);
string frameID = encoder.GetString(bFrameID);
byte[] bFrameSize = new byte[4];
Array.Copy(frameData, 4, bFrameSize, 0, bFrameSize.Length);
if (BitConverter.IsLittleEndian)
Array.Reverse(bFrameSize);
//Convert raw bytes to a uint for a size:
uint frameSize = BitConverter.ToUInt32(bFrameSize, 0);
byte[] bFrameContent = new byte[frameSize];
fileStream.Read(bFrameContent, 0, bFrameContent.Length);
//Now just check if we're caching it, and convert to relevent Object:
if (frameID.Equals("COMM"))
{
song.setAttribute("Comments", encoder.GetString(bFrameContent).Trim('\0'));
}
else if (frameID.Equals("TALB"))
{
song.setAttribute("Album", encoder.GetString(bFrameContent).Trim('\0'));
}
else if (frameID.Equals("TPE1") || frameID.Equals("TPE2"))
{
song.setAttribute("Artist", encoder.GetString(bFrameContent).Trim('\0'));
}
else if (frameID.Equals("TCON"))
{
var genre = ID3.Genres[BitConverter.ToInt32(bFrameContent, 0)];
}
Console.WriteLine("{0} - {1} bytes", frameID, frameSize);
}
}
return song;
}
