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8a9597e32e
The constant DESIRED_BUFFER_SIZE was determined by multiplying the old hardcoded value 32 with the default GCZ block size 16 KiB. Not sure if it actually is the best value, but it seems fine.
88 lines
2.0 KiB
C++
88 lines
2.0 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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#pragma once
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#include <memory>
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#include <string>
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#include <vector>
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#include "Common/CommonTypes.h"
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#include "Common/File.h"
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#include "DiscIO/Blob.h"
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namespace DiscIO
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{
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static constexpr u32 WBFS_MAGIC = 0x53464257; // "WBFS" (byteswapped to little endian)
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class WbfsFileReader : public BlobReader
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{
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public:
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~WbfsFileReader();
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static std::unique_ptr<WbfsFileReader> Create(File::IOFile file, const std::string& path);
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BlobType GetBlobType() const override { return BlobType::WBFS; }
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u64 GetRawSize() const override { return m_size; }
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// The WBFS format does not save the original file size.
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// This function returns a constant upper bound
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// (the size of a double-layer Wii disc).
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u64 GetDataSize() const override;
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bool IsDataSizeAccurate() const override { return false; }
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u64 GetBlockSize() const override { return m_wbfs_sector_size; }
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bool Read(u64 offset, u64 nbytes, u8* out_ptr) override;
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private:
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WbfsFileReader(File::IOFile file, const std::string& path);
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void OpenAdditionalFiles(const std::string& path);
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bool AddFileToList(File::IOFile file);
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bool ReadHeader();
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File::IOFile& SeekToCluster(u64 offset, u64* available);
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bool IsGood() { return m_good; }
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struct FileEntry
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{
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FileEntry(File::IOFile file_, u64 base_address_, u64 size_)
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: file(std::move(file_)), base_address(base_address_), size(size_)
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{
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}
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File::IOFile file;
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u64 base_address;
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u64 size;
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};
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std::vector<FileEntry> m_files;
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u64 m_size;
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u64 m_hd_sector_size;
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u64 m_wbfs_sector_size;
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u64 m_wbfs_sector_count;
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u64 m_disc_info_size;
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#pragma pack(1)
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struct WbfsHeader
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{
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u32 magic;
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u32 hd_sector_count;
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u8 hd_sector_shift;
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u8 wbfs_sector_shift;
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u8 padding[2];
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u8 disc_table[500];
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} m_header;
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#pragma pack()
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std::vector<u16> m_wlba_table;
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u64 m_blocks_per_disc;
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bool m_good;
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};
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} // namespace DiscIO
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