VTK  9.0.3
vtkLZ4DataCompressor.h
Go to the documentation of this file.
1 /*=========================================================================
2 
3  Program: Visualization Toolkit
4  Module: vtkLZ4DataCompressor.h
5 
6  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
7  All rights reserved.
8  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
9 
10  This software is distributed WITHOUT ANY WARRANTY; without even
11  the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
12  PURPOSE. See the above copyright notice for more information.
13 
14 =========================================================================*/
23 #ifndef vtkLZ4DataCompressor_h
24 #define vtkLZ4DataCompressor_h
25 
26 #include "vtkDataCompressor.h"
27 #include "vtkIOCoreModule.h" // For export macro
28 
29 class VTKIOCORE_EXPORT vtkLZ4DataCompressor : public vtkDataCompressor
30 {
31 public:
33  void PrintSelf(ostream& os, vtkIndent indent) override;
35 
42  size_t GetMaximumCompressionSpace(size_t size) override;
46  // Compression level getter required by vtkDataCompressor.
47  int GetCompressionLevel() override;
48 
49  // Compression level setter required by vtkDataCompresor.
50  void SetCompressionLevel(int compressionLevel) override;
51 
52  // Direct setting of AccelerationLevel allows more direct
53  // control over LZ4 compressor
54  vtkSetClampMacro(AccelerationLevel, int, 1, VTK_INT_MAX);
55  vtkGetMacro(AccelerationLevel, int);
56 
57 protected:
60 
62 
63  // Compression method required by vtkDataCompressor.
64  size_t CompressBuffer(unsigned char const* uncompressedData, size_t uncompressedSize,
65  unsigned char* compressedData, size_t compressionSpace) override;
66  // Decompression method required by vtkDataCompressor.
67  size_t UncompressBuffer(unsigned char const* compressedData, size_t compressedSize,
68  unsigned char* uncompressedData, size_t uncompressedSize) override;
69 
70 private:
72  void operator=(const vtkLZ4DataCompressor&) = delete;
73 };
74 
75 #endif
Abstract interface for data compression classes.
a simple class to control print indentation
Definition: vtkIndent.h:34
Data compression using LZ4.
~vtkLZ4DataCompressor() override
void SetCompressionLevel(int compressionLevel) override
Compression performance varies greatly with compression level Require level setting from any vtkDataC...
void PrintSelf(ostream &os, vtkIndent indent) override
Methods invoked by print to print information about the object including superclasses.
static vtkLZ4DataCompressor * New()
int GetCompressionLevel() override
Get/Set the compression level.
size_t GetMaximumCompressionSpace(size_t size) override
Get the maximum space that may be needed to store data of the given uncompressed size after compressi...
size_t UncompressBuffer(unsigned char const *compressedData, size_t compressedSize, unsigned char *uncompressedData, size_t uncompressedSize) override
size_t CompressBuffer(unsigned char const *uncompressedData, size_t uncompressedSize, unsigned char *compressedData, size_t compressionSpace) override
@ size
Definition: vtkX3D.h:259
#define VTK_INT_MAX
Definition: vtkType.h:155