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48 lines
1.1 KiB
C++
48 lines
1.1 KiB
C++
#pragma once
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#include <IO/WriteBuffer.h>
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#include <Compression/ICompressionCodec.h>
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#include <IO/BufferWithOwnMemory.h>
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#include <Parsers/StringRange.h>
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#include <Compression/LZ4_decompress_faster.h>
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namespace DB
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{
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class CompressionCodecLZ4 : public ICompressionCodec
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{
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public:
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UInt8 getMethodByte() const override;
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String getCodecDesc() const override;
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UInt32 getAdditionalSizeAtTheEndOfBuffer() const override { return LZ4::ADDITIONAL_BYTES_AT_END_OF_BUFFER; }
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protected:
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UInt32 doCompressData(const char * source, UInt32 source_size, char * dest) const override;
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private:
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void doDecompressData(const char * source, UInt32 source_size, char * dest, UInt32 uncompressed_size) const override;
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UInt32 getMaxCompressedDataSize(UInt32 uncompressed_size) const override;
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mutable LZ4::PerformanceStatistics lz4_stat;
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};
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class CompressionCodecLZ4HC : public CompressionCodecLZ4
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{
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public:
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CompressionCodecLZ4HC(int level_);
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String getCodecDesc() const override;
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protected:
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UInt32 doCompressData(const char * source, UInt32 source_size, char * dest) const override;
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private:
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const int level;
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};
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}
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