public StreamReadDecompress(Stream p_StreamDataForReading)
{
_StreamDataForReading = p_StreamDataForReading;
_StreamCompressedData = new MemoryStream();
_BufferCompressedData = new byte[0];
_BufferDecompressedData = new byte[0];
_StreamReadModules = new StreamReadModules();
}
public StreamReadPredecompressedChunks(Stream p_StreamDataForReading, int p_PreparedChunks = 1)
{
_StreamDataForReading = p_StreamDataForReading;
_StreamReadModules = new StreamReadModules();
_Chunks = new List <ChunkDecompress>(p_PreparedChunks);
for (var i = 0; i < p_PreparedChunks; i++)
{
var chunk = new ChunkDecompress(new byte[0], new byte[0], new MemoryStream());
chunk.ReadDataAndStartDecompressingInTask(_StreamDataForReading, _StreamReadModules, 80 * 1024);
_Chunks.Add(chunk);
}
}
public void ReadDataAndStartDecompressingInTask(Stream p_StreamDataForReading, StreamReadModules p_StreamReadModules, int p_Count)
{
_ManualResetEvent.Set();
//Read new compressed chunk
//Read first 4 bytes - may be known headerIdentification - it means that stream is compressed
byte[] intBytes = new byte[4];
var headerIdentification = p_StreamDataForReading.Read(intBytes, 0, intBytes.Length);
if (headerIdentification == 0)
{
_BufferDecompressedDataLength = 0;
return;
}
var module = p_StreamReadModules.FindByHeaderIdentification(intBytes);
if (module == null)
{
//not compressed by known headerIdentification - only copy to output
if (_BufferDecompressedData.Length < p_Count)
{
Array.Resize(ref _BufferDecompressedData, p_Count);
}
Array.Copy(intBytes, _BufferDecompressedData, intBytes.Length);
int readedOriginal = p_StreamDataForReading.ReadMaybeMoreTimes(_BufferDecompressedData, intBytes.Length, p_Count);
_BufferDecompressedDataLength = readedOriginal;
_BufferDecompressedDataPosition = 0;
return;
}
// Chunk header - Uncompressed and Compressed size
var readedUncompressedChunkSize = p_StreamDataForReading.Read(intBytes, 0, intBytes.Length);
if (readedUncompressedChunkSize == 0)
{
_BufferDecompressedDataLength = 0;
return;
}
var uncompressedChunkSize = BitConverter.ToInt32(intBytes, 0);
var readedCompressedChunkSize = p_StreamDataForReading.Read(intBytes, 0, intBytes.Length);
if (readedCompressedChunkSize == 0)
{
_BufferDecompressedDataLength = 0;
return;
}
var compressedChunkSize = BitConverter.ToInt32(intBytes, 0);
//Read Chunk data to _BufferCompressedData
if (_BufferCompressedData.Length < compressedChunkSize)
{
Array.Resize(ref _BufferCompressedData, compressedChunkSize);
}
int readed = p_StreamDataForReading.ReadMaybeMoreTimes(_BufferCompressedData, 0, compressedChunkSize);
if (readed == 0)
{
_BufferDecompressedDataLength = 0;
return;
}
_ManualResetEvent.Reset();
Task.Factory.StartNew(() => DecompressData(readed, module, uncompressedChunkSize));
}
