protected override Block ReadBlock(int index, [NotNull] PipelineInfo pipelineInfo)
{
var uncompressedStream = MemoryStreamManager.GetStream("Uncompressed");
SourceStream.CopyBlockTo(uncompressedStream, pipelineInfo.BlockSize);
uncompressedStream.Position = 0;
return(new Block(index, uncompressedStream));
}
protected override Block ReadBlock(int index, PipelineInfo pipelineInfo)
{
var position = ReadInt32();
if (position < 0 || position >= pipelineInfo.BlockCount)
{
throw new PipelineException("Source file corrupted.");
}
var compressedLength = ReadInt32();
if (compressedLength <= 0)
{
throw new PipelineException("Source file corrupted.");
}
var compressedStream = MemoryStreamManager.GetStream("Compressed");
SourceStream.CopyBlockTo(compressedStream, compressedLength);
compressedStream.Position = 0;
return(new Block(position, compressedStream));
}
protected abstract void BeforeBlockWrite([NotNull] Block block, [NotNull] PipelineInfo pipelineInfo);
protected abstract void PrepareForWrite([NotNull] PipelineInfo pipelineInfo);
protected abstract Block ReadBlock(int index, [NotNull] PipelineInfo pipelineInfo);
protected override void BeforeBlockWrite(Block block, PipelineInfo pipelineInfo)
{
// Write block header
Write(block.Position);
Write((int)block.Data.Length);
}
protected override void PrepareForWrite(PipelineInfo pipelineInfo)
{
// Write file header
Write(pipelineInfo.UncompressedSize);
Write(pipelineInfo.BlockSize);
}
protected override void BeforeBlockWrite([NotNull] Block block, [NotNull] PipelineInfo pipelineInfo)
{
var offset = (long)block.Position * pipelineInfo.BlockSize;
DestinationStream.Seek(offset, SeekOrigin.Begin);
}
protected override void PrepareForWrite([NotNull] PipelineInfo pipelineInfo)
{
DestinationStream.SetLength(pipelineInfo.UncompressedSize);
}