/// <summary>
/// Build a binary data frame form the frame object.
/// </summary>
/// <param name="frame">ID3 Frame</param>
/// <returns>binary frame representation</returns>
public byte[] Make(FrameBase frame, out ushort flags)
{
flags = GetFlags(frame);
var buffer = frame.Make();
var memoryStream = new MemoryStream();
var writer = new BinaryWriter(memoryStream);
if (frame.Group.HasValue == true)
{
writer.Write((byte)frame.Group);
}
if (frame.Compression == true)
{
switch (Version)
{
case 3:
{
writer.Write(Swap.Int32(buffer.Length));
break;
}
case 4:
{
writer.Write(Sync.UnsafeBigEndian(Swap.UInt32((uint)buffer.Length)));
break;
}
default:
{
throw new NotImplementedException("ID3v2 Version " + Version + " is not supported.");
}
}
var buf = new byte[2048];
var deflater = new Deflater(Deflater.BEST_COMPRESSION);
deflater.SetInput(buffer, 0, buffer.Length);
deflater.Finish();
while (!deflater.IsNeedingInput)
{
int len = deflater.Deflate(buf, 0, buf.Length);
if (len <= 0)
{
break;
}
memoryStream.Write(buf, 0, len);
}
if (!deflater.IsNeedingInput)
{
//TODO: Skip and remove invalid frames.
throw new InvalidFrameException("Can't decompress frame '" + frame.FrameId + "' missing data");
}
}
else
{
memoryStream.Write(buffer, 0, buffer.Length);
}
if (frame.Encryption == true)
{
//TODO: Encryption
throw new NotImplementedException("Encryption is not implemented, consequently it is not supported.");
}
if (frame.Unsynchronisation == true)
{
MemoryStream synchStream = new MemoryStream();
Sync.Unsafe(memoryStream, synchStream, (uint)memoryStream.Position);
memoryStream = synchStream;
}
return(memoryStream.ToArray());
}
internal byte[] Make([NotNull] FrameBase frame, out ushort flags)
{
flags = GetFlags(frame);
var buffer = frame.Make();
var memoryStream = new MemoryStream();
var streamsToClose = new List <Stream>(2)
{
memoryStream
};
try
{
using (var writer = new BinaryWriter(memoryStream, Encoding.UTF8, true))
{
if (frame.Group.HasValue)
{
writer.Write((byte)frame.Group);
}
if (frame.Compression)
{
switch (_version)
{
case 3:
writer.Write(Swap.Int32(buffer.Length));
break;
case 4:
writer.Write(Sync.UnsafeBigEndian(Swap.UInt32((uint)buffer.Length)));
break;
default:
throw new NotImplementedException($"ID3v2 Version {_version} is not supported.");
}
var buf = new byte[2048];
var deflater = new Deflater(Deflater.BEST_COMPRESSION);
deflater.SetInput(buffer, 0, buffer.Length);
deflater.Finish();
while (!deflater.IsNeedingInput)
{
var len = deflater.Deflate(buf, 0, buf.Length);
if (len <= 0)
{
break;
}
memoryStream.Write(buf, 0, len);
}
//TODO: Skip and remove invalid frames.
if (!deflater.IsNeedingInput)
{
throw new InvalidFrameException($"Can't decompress frame '{frame.FrameId}' missing data");
}
}
else
{
memoryStream.Write(buffer, 0, buffer.Length);
}
//TODO: Encryption
if (frame.Encryption)
{
throw new NotImplementedException(
"Encryption is not implemented, consequently it is not supported.");
}
if (frame.Unsynchronisation)
{
var synchStream = new MemoryStream();
streamsToClose.Add(synchStream);
Sync.Unsafe(memoryStream, synchStream, (uint)memoryStream.Position);
memoryStream = synchStream;
}
return(memoryStream.ToArray());
}
}
finally
{
foreach (var streamToClose in streamsToClose)
{
streamToClose.Close();
}
}
}
