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https://github.com/dolphin-emu/dolphin.git
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d210fbac2c
Currently scrubbing will display a warning that it removes the garbage data PERMENENTLY from the original file (mainly for speed of scrubbing). It could be removed in the future if people agree with me, since it is indeed just garbage. Any tips for making scrubbing faster would be welcomed :) git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@3267 8ced0084-cf51-0410-be5f-012b33b47a6e
83 lines
2.2 KiB
C++
83 lines
2.2 KiB
C++
// Copyright (C) 2003-2009 Dolphin Project.
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, version 2.0.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official SVN repository and contact information can be found at
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// http://code.google.com/p/dolphin-emu/
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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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#ifndef COMPRESSED_BLOB_H_
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#define COMPRESSED_BLOB_H_
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#include <stdio.h>
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#include "Blob.h"
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namespace DiscIO
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{
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bool IsCompressedBlob(const char* filename);
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const u32 kBlobCookie = 0xB10BC001;
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// A blob 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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private:
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CompressedBlobHeader header;
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u64 *block_pointers;
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u32 *hashes;
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int data_offset;
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FILE *file;
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u64 file_size;
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u8 *zlib_buffer;
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int zlib_buffer_size;
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CompressedBlobReader(const char *filename);
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public:
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static CompressedBlobReader* Create(const char *filename);
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~CompressedBlobReader();
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const CompressedBlobHeader &GetHeader() const { return header; }
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u64 GetDataSize() const { return header.data_size; }
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u64 GetRawSize() const { return file_size; }
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u64 GetBlockCompressedSize(u64 block_num) const;
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void GetBlock(u64 block_num, u8 *out_ptr);
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};
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} // namespace
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#endif // COMPRESSED_BLOB_H_
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