/// <summary>
/// Creates a new instance of a RomMetadataBlock by inflating it from a BinaryReader.
/// </summary>
/// <param name="reader">The binary reader containing the data to deserialize to create the object.</param>
/// <returns>A new instance of a RomMetadataBlock.</returns>
/// <remarks>It is assumed that the reader is currently positioned at the beginning of a serialized ROM metadata block.</remarks>
public static RomMetadataBlock Inflate(INTV.Core.Utility.BinaryReader reader)
{
RomMetadataBlock metadataBlock = null;
int additionalBytesInPayloadLength;
var payloadLength = DecodeLength(reader, out additionalBytesInPayloadLength);
var metadataBlockType = (RomMetadataIdTag)reader.ReadByte();
switch (metadataBlockType)
{
case RomMetadataIdTag.Title:
case RomMetadataIdTag.ShortTitle:
case RomMetadataIdTag.License:
case RomMetadataIdTag.Description:
case RomMetadataIdTag.Version:
case RomMetadataIdTag.UrlContactInfo:
metadataBlock = new RomMetadataString(payloadLength, metadataBlockType);
break;
case RomMetadataIdTag.ReleaseDate:
case RomMetadataIdTag.BuildDate:
metadataBlock = new RomMetadataDate(payloadLength, metadataBlockType);
break;
case RomMetadataIdTag.Features:
metadataBlock = new RomMetadataFeatures(payloadLength);
break;
case RomMetadataIdTag.Publisher:
metadataBlock = new RomMetadataPublisher(payloadLength);
break;
case RomMetadataIdTag.Credits:
metadataBlock = new RomMetadataCredits(payloadLength);
break;
case RomMetadataIdTag.ControllerBindings:
metadataBlock = new RomMetadataControllerBindings(payloadLength);
break;
default:
metadataBlock = new RomMetadataBlock(payloadLength, metadataBlockType);
break;
}
metadataBlock._deserializeByteCount = (int)payloadLength + additionalBytesInPayloadLength + 1 + CrcByteCount + sizeof(RomMetadataIdTag);
metadataBlock.Deserialize(reader);
// Re-reading the block is more expensive than having a running CRC16 but it's easier to implement. :P
var numBytesInForCrc = metadataBlock._deserializeByteCount - CrcByteCount;
reader.BaseStream.Seek(-numBytesInForCrc, System.IO.SeekOrigin.Current);
var payload = reader.ReadBytes(numBytesInForCrc);
metadataBlock.Crc = (ushort)(((int)reader.ReadByte() << 8) | reader.ReadByte());
metadataBlock.ValidatePayloadCrc(payload);
return(metadataBlock);
}
/// <summary>
/// Creates a new instance of a RomMetadataBlock by inflating it from a Stream.
/// </summary>
/// <param name="stream">The stream containing the data to deserialize to create the object.</param>
/// <returns>A new instance of a RomMetadataBlock.</returns>
public static RomMetadataBlock Inflate(System.IO.Stream stream)
{
RomMetadataBlock metadataBlock = null;
using (var reader = new INTV.Core.Utility.BinaryReader(stream))
{
metadataBlock = Inflate(reader);
}
return(metadataBlock);
}
