public static INeuralNetworkImage Restore(FileStream stream)
{
if (stream == null)
{
throw new ArgumentNullException(nameof(stream));
}
// 1: read version: 2-bytes
var buffer = new byte[2];
stream.Read(buffer, 0, buffer.Length);
var signal = BitConverter.ToUInt16(buffer, 0);
if (signal != SectionType.SECTION_START_SIGNAL)
{
throw new Exception($"Invalid section start signal ({signal}).");
}
stream.Read(buffer, 0, 1);
stream.Seek(-3, SeekOrigin.Current);
return(buffer[0] switch
{
NeuralNetworkSerializer.SECTION_TYPE => NeuralNetworkSerializer.Restore(stream),
NeuralNetworkLineSerializer.SECTION_TYPE => NeuralNetworkLineSerializer.Restore(stream),
_ => throw new Exception($"Invalid neural network section type ({buffer[0]}).")
});
public static object Restore(string path, out byte[] extra)
{
if (path == null)
{
throw new ArgumentNullException(nameof(path));
}
using var stream = File.OpenRead(path);
// read file signature
var file_type_signature = SectionType.ReadSigniture(stream, Encoding.ASCII);
object result;
switch (file_type_signature)
{
case LearningProcessSerializer.FILE_TYPE_SIGNATURE_STRING:
result = LearningProcessSerializer.Restore(stream);
extra = ReadExtra(stream);
return(result);
case NeuralNetworkSerializer.FILE_TYPE_SIGNATURE_STRING:
result = NeuralNetworkSerializer.Restore(stream);
extra = ReadExtra(stream);
return(result);
case NeuralNetworkLineSerializer.FILE_TYPE_SIGNATURE_STRING:
result = NeuralNetworkLineSerializer.Restore(stream);
extra = ReadExtra(stream);
return(result);
default:
throw new Exception($"Invalid file type ({file_type_signature}).");
}
}