103 lines
2.7 KiB
C
103 lines
2.7 KiB
C
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// Copyright 2018 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 <array>
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#include <memory>
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#include "Common/CommonTypes.h"
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#include "Common/File.h"
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#include "Common/Swap.h"
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#include "DiscIO/Blob.h"
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namespace DiscIO
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{
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constexpr u32 WIA_MAGIC = 0x01414957; // "WIA\x1" (byteswapped to little endian)
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class WIAFileReader : public BlobReader
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{
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public:
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~WIAFileReader();
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static std::unique_ptr<WIAFileReader> Create(File::IOFile file, const std::string& path);
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BlobType GetBlobType() const override { return BlobType::WIA; }
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u64 GetRawSize() const override { return Common::swap64(m_header_1.wia_file_size); }
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u64 GetDataSize() const override { return Common::swap64(m_header_1.iso_file_size); }
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bool IsDataSizeAccurate() const override { return true; }
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u64 GetBlockSize() const override { return Common::swap32(m_header_2.chunk_size); }
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bool HasFastRandomAccessInBlock() const override { return false; }
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bool Read(u64 offset, u64 size, u8* out_ptr) override;
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private:
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explicit WIAFileReader(File::IOFile file, const std::string& path);
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bool Initialize(const std::string& path);
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static std::string VersionToString(u32 version);
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using SHA1 = std::array<u8, 20>;
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#pragma pack(push, 1)
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struct WIAHeader1
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{
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u32 magic;
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u32 version;
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u32 version_compatible;
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u32 header_2_size;
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SHA1 header_2_hash;
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u64 iso_file_size;
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u64 wia_file_size;
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SHA1 header_1_hash;
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};
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#pragma pack(pop)
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static_assert(sizeof(WIAHeader1) == 0x48, "Wrong size for WIA header 1");
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#pragma pack(push, 1)
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struct WIAHeader2
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{
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u32 disc_type;
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u32 compression_type;
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u32 compression_level; // Informative only
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u32 chunk_size;
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std::array<u8, 0x80> disc_header;
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u32 number_of_partitions_entries;
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u32 partition_entry_size;
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u64 partition_entries_offset;
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SHA1 partition_entries_hash;
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u32 number_of_raw_data_entries;
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u64 raw_data_entries_offset;
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u32 raw_data_entries_size;
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u32 number_of_group_entries;
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u64 group_entries_offset;
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u32 group_entries_size;
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};
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#pragma pack(pop)
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static_assert(sizeof(WIAHeader2) == 0xd4, "Wrong size for WIA header 2");
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bool m_valid;
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File::IOFile m_file;
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WIAHeader1 m_header_1;
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WIAHeader2 m_header_2;
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static constexpr u32 WIA_VERSION = 0x01000000;
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static constexpr u32 WIA_VERSION_WRITE_COMPATIBLE = 0x01000000;
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static constexpr u32 WIA_VERSION_READ_COMPATIBLE = 0x00080000;
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// Perhaps we could set WIA_VERSION_WRITE_COMPATIBLE to 0.9, but WIA version 0.9 was never in
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// any official release of wit, and interim versions (either source or binaries) are hard to find.
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// Since we've been unable to check if we're write compatible with 0.9, we set it 1.0 to be safe.
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};
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} // namespace DiscIO
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