public static PsnPacketChunk FromByteArray(byte[] data)
{
try
{
using (var ms = new MemoryStream(data))
using (var reader = new PsnBinaryReader(ms))
{
var chunkHeader = reader.ReadChunkHeader();
switch ((PsnPacketChunkId)chunkHeader.ChunkId)
{
case PsnPacketChunkId.PsnDataPacket:
return(PsnDataPacketChunk.Deserialize(chunkHeader, reader));
case PsnPacketChunkId.PsnInfoPacket:
return(PsnInfoPacketChunk.Deserialize(chunkHeader, reader));
default:
return(PsnUnknownPacketChunk.Deserialize(chunkHeader, reader));
}
}
}
catch (EndOfStreamException)
{
// Received a bad packet
return(null);
}
}
/// <summary>
/// Searches the binary stream for the positions of sub-chunk headers
/// </summary>
/// <exception cref="IOException">An I/O error occurs. </exception>
/// <exception cref="NotSupportedException">The stream does not support seeking. </exception>
internal static IEnumerable <Tuple <PsnChunkHeader, long> > FindSubChunkHeaders(PsnBinaryReader reader,
int chunkDataLength)
{
var chunkHeaders = new List <Tuple <PsnChunkHeader, long> >();
long startPos = reader.BaseStream.Position;
while (reader.BaseStream.Position - startPos < chunkDataLength)
{
var chunkHeader = reader.ReadChunkHeader();
chunkHeaders.Add(Tuple.Create(chunkHeader, reader.BaseStream.Position));
reader.Seek(chunkHeader.DataLength, SeekOrigin.Current);
Debug.Assert(reader.BaseStream.Position - startPos <= chunkDataLength);
}
reader.Seek(startPos, SeekOrigin.Begin);
return(chunkHeaders);
}