private static Id3Frame DecodePicture(byte[] data)
{
var frame = new PictureFrame {
EncodingType = (Id3TextEncoding)data[0]
};
byte[] mimeType = ByteArrayHelper.GetBytesUptoSequence(data, 1, new byte[] { 0x00 });
if (mimeType == null)
{
frame.MimeType = "image/";
return(frame);
}
frame.MimeType = TextEncodingHelper.GetDefaultString(mimeType, 0, mimeType.Length);
int currentPos = mimeType.Length + 2;
frame.PictureType = (PictureType)data[currentPos];
currentPos++;
byte[] description = ByteArrayHelper.GetBytesUptoSequence(data, currentPos,
TextEncodingHelper.GetSplitterBytes(frame.EncodingType));
if (description == null)
{
return(frame);
}
frame.Description = TextEncodingHelper.GetString(description, 0, description.Length, frame.EncodingType);
currentPos += description.Length + TextEncodingHelper.GetSplitterBytes(frame.EncodingType).Length;
frame.PictureData = new byte[data.Length - currentPos];
Array.Copy(data, currentPos, frame.PictureData, 0, frame.PictureData.Length);
return(frame);
}
private static Id3Frame DecodePrivate(byte[] data)
{
var frame = new PrivateFrame();
byte[] splitterSequence = TextEncodingHelper.GetSplitterBytes(Id3TextEncoding.Iso8859_1);
byte[] ownerIdBytes = ByteArrayHelper.GetBytesUptoSequence(data, 0, splitterSequence);
frame.OwnerId = TextEncodingHelper.GetString(ownerIdBytes, 0, ownerIdBytes.Length, Id3TextEncoding.Iso8859_1);
frame.Data = new byte[data.Length - ownerIdBytes.Length - splitterSequence.Length];
Array.Copy(data, ownerIdBytes.Length + splitterSequence.Length, frame.Data, 0, frame.Data.Length);
return(frame);
}
public void GetBytesUptoSequenceTests(byte[] source, byte[] sequence, byte[] expectedResult)
{
Assert.True(ByteArrayHelper.AreEqual(ByteArrayHelper.GetBytesUptoSequence(source, 0, sequence), expectedResult));
}
