private TagData getID3Tags(FileInfo fi)
{
ContainerFactory fac = new ContainerFactory();
var stream = fi.OpenRead();
MP3Data data;
try
{
data = fac.Create(stream);
if (data == null) return null;
var outStream = new MemoryStream();
var writer = new ID3V23TagWriter(outStream);
writer.WriteFrame(data.Frames);
TagData tags = new TagData();
tags.ContentLength = stream.Length - 128 - outStream.Length;
outStream.Seek(0, SeekOrigin.Begin);
tags.Begin = outStream.ToArray();
return tags;
}
catch (Exception e)
{
return null;
}
}
public TagFakeStream(TagData data)
{
_data = data;
// create memoryStream from Begin
DataAtBegin = new MemoryStream(_data.Begin);
DataAtEnd = new MemoryStream(_data.End);
_length = DataAtBegin.Length + DataAtEnd.Length + _data.ContentLength;
}
public void ShouldReadAsOne()
{
var data = new TagData();
data.ContentLength = 1;
data.Begin = arrayByLength(1, 1);
data.End = arrayByLength(3, 1);
var stream = new TagFakeStream(data);
byte[] result = new byte[3];
stream.Read(result, 0, 3);
compareStreams(result, 1, 0, 3);
}
public void MultipleSeekShouldNotChangeResult()
{
var data = new TagData();
data.ContentLength = 1;
data.Begin = arrayByValue(0,1,2,3,4);
data.End = arrayByValue(5,6,7,8,9);
var stream = new TagFakeStream(data);
// lies erst 3
// seek in den nächsten bereich
// lies
// lies nochmal
var result = new byte[2];
stream.Seek(3, SeekOrigin.Begin);
stream.Read(result, 0, 2);
compareStreams(result, 3, 4);
result = new byte[3];
stream.Seek(3, SeekOrigin.Begin);
stream.Read(result, 0, 3);
compareStreams(result, 3, 4, 0);
}