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edbbf493f8
Rather than rely on the developer to do the right thing, just make the default behavior safely deallocate resources. If shared semantics are ever needed in the future, the constructor that takes a unique_ptr for shared_ptr can be used.
72 lines
1.8 KiB
C++
72 lines
1.8 KiB
C++
// Copyright 2008 Dolphin Emulator Project
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// Licensed under GPLv2+
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// Refer to the license.txt file included.
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// WARNING Code not big-endian safe.
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// To create new compressed BLOBs, use CompressFileToBlob.
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// File format
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// * Header
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// * [Block Pointers interleaved with block hashes (hash of decompressed data)]
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// * [Data]
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#pragma once
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#include <memory>
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#include <string>
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#include "Common/CommonTypes.h"
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#include "Common/FileUtil.h"
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#include "DiscIO/Blob.h"
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namespace DiscIO
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{
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bool IsGCZBlob(const std::string& filename);
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const u32 kBlobCookie = 0xB10BC001;
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// GCZ file structure:
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// BlobHeader
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// u64 offsetsToBlocks[n], top bit specifies whether the block is compressed, or not.
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// compressed data
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// Blocks that won't compress to less than 97% of the original size are stored as-is.
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struct CompressedBlobHeader // 32 bytes
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{
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u32 magic_cookie; //0xB10BB10B
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u32 sub_type; // GC image, whatever
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u64 compressed_data_size;
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u64 data_size;
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u32 block_size;
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u32 num_blocks;
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};
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class CompressedBlobReader : public SectorReader
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{
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public:
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static std::unique_ptr<CompressedBlobReader> Create(const std::string& filename);
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~CompressedBlobReader();
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const CompressedBlobHeader &GetHeader() const { return m_header; }
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BlobType GetBlobType() const override { return BlobType::GCZ; }
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u64 GetDataSize() const override { return m_header.data_size; }
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u64 GetRawSize() const override { return m_file_size; }
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u64 GetBlockCompressedSize(u64 block_num) const;
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void GetBlock(u64 block_num, u8* out_ptr) override;
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private:
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CompressedBlobReader(const std::string& filename);
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CompressedBlobHeader m_header;
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u64* m_block_pointers;
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u32* m_hashes;
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int m_data_offset;
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File::IOFile m_file;
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u64 m_file_size;
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u8* m_zlib_buffer;
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int m_zlib_buffer_size;
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std::string m_file_name;
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};
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} // namespace
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