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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
/**
* @class vtkLZ4DataCompressor
* @brief Data compression using LZ4.
*
* vtkLZ4DataCompressor provides a concrete vtkDataCompressor class
* using LZ4 for compressing and uncompressing data.
*/
#ifndef vtkLZ4DataCompressor_h
#define vtkLZ4DataCompressor_h
#include "vtkDataCompressor.h"
#include "vtkIOCoreModule.h" // For export macro
VTK_ABI_NAMESPACE_BEGIN
class VTKIOCORE_EXPORT vtkLZ4DataCompressor : public vtkDataCompressor
{
public:
vtkTypeMacro(vtkLZ4DataCompressor, vtkDataCompressor);
void PrintSelf(ostream& os, vtkIndent indent) override;
static vtkLZ4DataCompressor* New();
/**
* Get the maximum space that may be needed to store data of the
* given uncompressed size after compression. This is the minimum
* size of the output buffer that can be passed to the four-argument
* Compress method.
*/
size_t GetMaximumCompressionSpace(size_t size) override;
/**
* Get/Set the compression level.
*/
// Compression level getter required by vtkDataCompressor.
int GetCompressionLevel() override;
// Compression level setter required by vtkDataCompresor.
void SetCompressionLevel(int compressionLevel) override;
// Direct setting of AccelerationLevel allows more direct
// control over LZ4 compressor
vtkSetClampMacro(AccelerationLevel, int, 1, VTK_INT_MAX);
vtkGetMacro(AccelerationLevel, int);
protected:
vtkLZ4DataCompressor();
~vtkLZ4DataCompressor() override;
int AccelerationLevel;
// Compression method required by vtkDataCompressor.
size_t CompressBuffer(unsigned char const* uncompressedData, size_t uncompressedSize,
unsigned char* compressedData, size_t compressionSpace) override;
// Decompression method required by vtkDataCompressor.
size_t UncompressBuffer(unsigned char const* compressedData, size_t compressedSize,
unsigned char* uncompressedData, size_t uncompressedSize) override;
private:
vtkLZ4DataCompressor(const vtkLZ4DataCompressor&) = delete;
void operator=(const vtkLZ4DataCompressor&) = delete;
};
VTK_ABI_NAMESPACE_END
#endif
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