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37 lines
1,009 B
C++
37 lines
1,009 B
C++
#pragma once
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#include <memory>
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#include "Types.h"
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#include "Stream.h"
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class CCsoImageStream : public Framework::CStream
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{
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public:
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CCsoImageStream(std::unique_ptr<Framework::CStream> baseStream);
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virtual ~CCsoImageStream();
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virtual void Seek(int64 pos, Framework::STREAM_SEEK_DIRECTION whence) override;
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virtual uint64 Tell() override;
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virtual bool IsEOF() override;
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virtual uint64 Read(void* dest, uint64 bytes) override;
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virtual uint64 Write(const void* src, uint64 bytes) override;
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private:
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void ReadFileHeader();
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void InitializeBuffers();
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uint64 GetTotalSize() const;
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uint32 ReadFromNextFrame(uint8* dest, uint64 maxBytes);
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uint64 ReadBaseAt(uint64 pos, uint8* dest, uint64 bytes);
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void DecompressFrame(uint32 frame, uint64 readBufferSize);
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std::unique_ptr<Framework::CStream> m_baseStream;
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uint32 m_frameSize;
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uint8 m_frameShift;
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uint8 m_indexShift;
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uint8* m_readBuffer;
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uint8* m_zlibBuffer;
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uint32 m_zlibBufferFrame;
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uint32* m_index;
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uint64 m_totalSize;
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uint64 m_position;
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};
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