mirror of
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1077 lines
48 KiB
C#
1077 lines
48 KiB
C#
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// /***************************************************************************
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// The Disc Image Chef
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// ----------------------------------------------------------------------------
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//
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// Filename : DiscImageChef.cs
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// Author(s) : Natalia Portillo <claunia@claunia.com>
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//
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// Component : Disk image plugins.
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//
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// --[ Description ] ----------------------------------------------------------
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//
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// Manages DiscImageChef format disk images.
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//
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// --[ License ] --------------------------------------------------------------
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//
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// This library is free software; you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as
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// published by the Free Software Foundation; either version 2.1 of the
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// License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, see <http://www.gnu.org/licenses/>.
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//
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// ----------------------------------------------------------------------------
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// Copyright © 2011-2018 Natalia Portillo
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// ****************************************************************************/
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/*
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The idea of the format is being able to easily store, retrieve, and access any data that can be read from media.
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At the start of a file there's a header that contains a format version, application creator name, and a pointer to
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the index.
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The index points to one or several DeDuplication Tables, or media tag blocks.
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A deduplication table is a table of offsets to blocks and sectors inside blocks. Each entry equals to an LBA and points
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to a byte offset in the file shift left to the number of sectors contained in a block, plus the number of sector inside
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the block.
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Each block must contain sectors of equal size, but that size can be different between blocks.
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The deduplication table should be stored decompressed if its size is too big to be stored on-memory. This is chosen at
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creation time but it is a good idea to set the limit to 256MiB (this allows for a device of 33 million sectors,
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17Gb at 512 bps, 68Gb at 2048 bps and 137Gb at 4096 bps).
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Sector tags that are simply too small to be deduplicated are contained in a single block pointed by the index (e.g.
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Apple GCR sector tags).
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Optical disks contain a track block that describes the tracks.
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Streaming tapes contain a file block that describes the files and an optional partition block that describes the tape
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partitions.
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There are also blocks for image metadata, contents metadata and dump hardware information.
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A differencing image will have all the metadata and deduplication tables, but the entries in these ones will be set to
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0 if the block is stored in the parent image. This is not yet implemented.
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Also because the file becomes useless without the index and deduplication table, each can be stored twice. In case of
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the index it should just be searched for. In case of deduplication tables, both copies should be indexed.
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Finally, writing new data to an existing image is just Copy-On-Write. Create a new block with the modified data, change
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the pointer in the corresponding deduplication table.
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P.S.: Data Position Measurement is doable, as soon as I know how to do it.
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*/
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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Runtime.InteropServices;
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using System.Security.Cryptography;
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using DiscImageChef.Checksums;
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using DiscImageChef.CommonTypes;
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using DiscImageChef.Console;
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using DiscImageChef.Filters;
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using SharpCompress.Compressors.LZMA;
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namespace DiscImageChef.DiscImages
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{
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// TODO: Work in progress
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public class DiscImageChef : IWritableImage
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{
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const ulong DIC_MAGIC = 0x544D464444434944;
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MemoryStream blockStream;
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SHA256 checksumProvider;
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LzmaStream compressedBlockStream;
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Crc64Context crc64;
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BlockHeader currentBlockHeader;
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Dictionary<byte[], ulong> deduplicationTable;
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GeometryBlock geometryBlock;
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DicHeader header;
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Stream imageStream;
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List<IndexEntry> index;
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bool inMemoryDdt;
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Dictionary<MediaTagType, byte[]> mediaTags;
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long outMemoryDdtPosition;
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byte shift;
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byte[] structureBytes;
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IntPtr structurePointer;
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ulong[] userDataDdt;
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public DiscImageChef()
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{
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Info = new ImageInfo
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{
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ReadableSectorTags = new List<SectorTagType>(),
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ReadableMediaTags = new List<MediaTagType>(),
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HasPartitions = false,
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HasSessions = false,
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Version = null,
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Application = "DiscImageChef",
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ApplicationVersion = null,
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Creator = null,
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Comments = null,
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MediaManufacturer = null,
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MediaModel = null,
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MediaSerialNumber = null,
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MediaBarcode = null,
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MediaPartNumber = null,
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MediaSequence = 0,
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LastMediaSequence = 0,
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DriveManufacturer = null,
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DriveModel = null,
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DriveSerialNumber = null,
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DriveFirmwareRevision = null
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};
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}
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public ImageInfo Info { get; private set; }
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public string Name => "DiscImageChef format plugin";
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public Guid Id => new Guid("49360069-1784-4A2F-B723-0C844D610B0A");
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public string Format => "DiscImageChef";
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public List<Partition> Partitions { get; }
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public List<Track> Tracks { get; private set; }
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public List<Session> Sessions { get; }
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public bool Identify(IFilter imageFilter)
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{
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imageStream = imageFilter.GetDataForkStream();
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imageStream.Seek(0, SeekOrigin.Begin);
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if(imageStream.Length < 512) return false;
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header = new DicHeader();
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structureBytes = new byte[Marshal.SizeOf(header)];
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imageStream.Read(structureBytes, 0, structureBytes.Length);
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structurePointer = Marshal.AllocHGlobal(Marshal.SizeOf(header));
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Marshal.Copy(structureBytes, 0, structurePointer, Marshal.SizeOf(header));
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header = (DicHeader)Marshal.PtrToStructure(structurePointer, typeof(DicHeader));
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Marshal.FreeHGlobal(structurePointer);
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return header.identifier == DIC_MAGIC && header.imageMajorVersion == 0;
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}
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public bool Open(IFilter imageFilter)
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{
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throw new NotImplementedException();
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}
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public byte[] ReadDiskTag(MediaTagType tag)
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{
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if(mediaTags.TryGetValue(tag, out byte[] data)) return data;
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throw new FeatureNotPresentImageException("Requested tag is not present in image");
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}
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public byte[] ReadSector(ulong sectorAddress)
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{
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throw new NotImplementedException();
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}
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public byte[] ReadSectorTag(ulong sectorAddress, SectorTagType tag)
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{
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throw new NotImplementedException();
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}
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public byte[] ReadSector(ulong sectorAddress, uint track)
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{
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throw new NotImplementedException();
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}
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public byte[] ReadSectorTag(ulong sectorAddress, uint track, SectorTagType tag)
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{
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throw new NotImplementedException();
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}
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public byte[] ReadSectors(ulong sectorAddress, uint length)
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{
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throw new NotImplementedException();
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}
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public byte[] ReadSectorsTag(ulong sectorAddress, uint length, SectorTagType tag)
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{
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throw new NotImplementedException();
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}
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public byte[] ReadSectors(ulong sectorAddress, uint length, uint track)
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{
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throw new NotImplementedException();
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}
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public byte[] ReadSectorsTag(ulong sectorAddress, uint length, uint track, SectorTagType tag)
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{
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throw new NotImplementedException();
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}
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public byte[] ReadSectorLong(ulong sectorAddress)
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{
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throw new NotImplementedException();
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}
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public byte[] ReadSectorLong(ulong sectorAddress, uint track)
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{
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throw new NotImplementedException();
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}
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public byte[] ReadSectorsLong(ulong sectorAddress, uint length)
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{
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throw new NotImplementedException();
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}
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public byte[] ReadSectorsLong(ulong sectorAddress, uint length, uint track)
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{
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throw new NotImplementedException();
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}
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public List<Track> GetSessionTracks(Session session)
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{
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return Tracks.Where(t => t.TrackSequence == session.SessionSequence).ToList();
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}
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public List<Track> GetSessionTracks(ushort session)
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{
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return Tracks.Where(t => t.TrackSequence == session).ToList();
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}
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public bool? VerifySector(ulong sectorAddress)
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{
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throw new NotImplementedException();
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}
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public bool? VerifySector(ulong sectorAddress, uint track)
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{
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throw new NotImplementedException();
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}
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public bool? VerifySectors(ulong sectorAddress, uint length, out List<ulong> failingLbas,
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out List<ulong> unknownLbas)
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{
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throw new NotImplementedException();
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}
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public bool? VerifySectors(ulong sectorAddress, uint length, uint track, out List<ulong> failingLbas,
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out List<ulong> unknownLbas)
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{
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throw new NotImplementedException();
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}
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public bool? VerifyMediaImage()
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{
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throw new NotImplementedException();
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}
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public IEnumerable<MediaTagType> SupportedMediaTags => Enum.GetValues(typeof(MediaType)).Cast<MediaTagType>();
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public IEnumerable<SectorTagType> SupportedSectorTags =>
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Enum.GetValues(typeof(MediaType)).Cast<SectorTagType>();
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public IEnumerable<MediaType> SupportedMediaTypes =>
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Enum.GetValues(typeof(MediaType)).Cast<MediaType>();
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public IEnumerable<(string name, Type type, string description)> SupportedOptions =>
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new[]
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{
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("sectors_per_block", typeof(uint),
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"How many sectors to store per block (will be rounded to next power of two)")
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};
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public IEnumerable<string> KnownExtensions => new[] {".dicf"};
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public bool IsWriting { get; private set; }
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public string ErrorMessage { get; private set; }
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// TODO: Support resume
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public bool Create(string path, MediaType mediaType, Dictionary<string, string> options, ulong sectors,
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uint sectorSize)
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{
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uint sectorsPerBlock;
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if(options != null)
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if(options.TryGetValue("sectors_per_block", out string tmpValue))
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{
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if(!uint.TryParse(tmpValue, out sectorsPerBlock))
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{
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ErrorMessage = "Invalid value for sectors_per_block option";
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return false;
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}
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}
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else
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sectorsPerBlock = 4096;
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else sectorsPerBlock = 4096;
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if(!SupportedMediaTypes.Contains(mediaType))
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{
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ErrorMessage = $"Unsupport media format {mediaType}";
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return false;
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}
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shift = 0;
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uint oldSectorsPerBlock = sectorsPerBlock;
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while(sectorsPerBlock > 1)
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{
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sectorsPerBlock >>= 1;
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shift++;
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}
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DicConsole.DebugWriteLine("DiscImageChef format plugin", "Got a shift of {0} for {1} sectors per block",
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shift, oldSectorsPerBlock);
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Info = new ImageInfo {MediaType = mediaType, SectorSize = sectorSize, Sectors = sectors};
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try { imageStream = new FileStream(path, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.None); }
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catch(IOException e)
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{
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ErrorMessage = $"Could not create new image file, exception {e.Message}";
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return false;
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}
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index = new List<IndexEntry>();
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|
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|
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// TODO: Set correct version
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header = new DicHeader
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{
|
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identifier = DIC_MAGIC,
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application = "DiscImageChef",
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imageMajorVersion = 0,
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imageMinorVersion = 0,
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applicationMajorVersion = 4,
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|||
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applicationMinorVersion = 0,
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mediaType = mediaType
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};
|
|||
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|
|||
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// TODO: Settable
|
|||
|
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inMemoryDdt = sectors <= 256 * 1024 * 1024 / sizeof(ulong);
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|||
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|
|||
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DicConsole.DebugWriteLine("DiscImageChef format plugin", "In memory DDT?: {0}", inMemoryDdt);
|
|||
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|
|||
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imageStream.Write(new byte[Marshal.SizeOf(typeof(DicHeader))], 0, Marshal.SizeOf(typeof(DicHeader)));
|
|||
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|
|||
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if(inMemoryDdt) userDataDdt = new ulong[sectors];
|
|||
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else
|
|||
|
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{
|
|||
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outMemoryDdtPosition = imageStream.Position;
|
|||
|
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index.Add(new IndexEntry
|
|||
|
|
{
|
|||
|
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blockType = BlockType.DeDuplicationTable,
|
|||
|
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dataType = DataType.UserData,
|
|||
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offset = (ulong)outMemoryDdtPosition
|
|||
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});
|
|||
|
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|
|||
|
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// CRC64 will be calculated later
|
|||
|
|
DdtHeader ddtHeader = new DdtHeader
|
|||
|
|
{
|
|||
|
|
identifier = BlockType.DeDuplicationTable,
|
|||
|
|
type = DataType.UserData,
|
|||
|
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compression = CompressionType.None,
|
|||
|
|
shift = shift,
|
|||
|
|
entries = sectors,
|
|||
|
|
cmpLength = sectors * sizeof(ulong),
|
|||
|
|
length = sectors * sizeof(ulong)
|
|||
|
|
};
|
|||
|
|
|
|||
|
|
structurePointer = Marshal.AllocHGlobal(Marshal.SizeOf(ddtHeader));
|
|||
|
|
structureBytes = new byte[Marshal.SizeOf(ddtHeader)];
|
|||
|
|
Marshal.StructureToPtr(ddtHeader, structurePointer, true);
|
|||
|
|
Marshal.Copy(structurePointer, structureBytes, 0, structureBytes.Length);
|
|||
|
|
Marshal.FreeHGlobal(structurePointer);
|
|||
|
|
imageStream.Write(structureBytes, 0, structureBytes.Length);
|
|||
|
|
structureBytes = null;
|
|||
|
|
|
|||
|
|
// TODO: Can be changed to a seek?
|
|||
|
|
imageStream.Write(new byte[sectors * sizeof(ulong)], 0, (int)(sectors * sizeof(ulong)));
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
mediaTags = new Dictionary<MediaTagType, byte[]>();
|
|||
|
|
checksumProvider = SHA256.Create();
|
|||
|
|
deduplicationTable = new Dictionary<byte[], ulong>();
|
|||
|
|
|
|||
|
|
IsWriting = true;
|
|||
|
|
ErrorMessage = null;
|
|||
|
|
return true;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
public bool WriteMediaTag(byte[] data, MediaTagType tag)
|
|||
|
|
{
|
|||
|
|
if(!IsWriting)
|
|||
|
|
{
|
|||
|
|
ErrorMessage = "Tried to write on a non-writable image";
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if(mediaTags.ContainsKey(tag)) mediaTags.Remove(tag);
|
|||
|
|
|
|||
|
|
mediaTags.Add(tag, data);
|
|||
|
|
|
|||
|
|
ErrorMessage = "";
|
|||
|
|
return true;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// TODO: Resume
|
|||
|
|
public bool WriteSector(byte[] data, ulong sectorAddress)
|
|||
|
|
{
|
|||
|
|
if(!IsWriting)
|
|||
|
|
{
|
|||
|
|
ErrorMessage = "Tried to write on a non-writable image";
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if(sectorAddress >= Info.Sectors)
|
|||
|
|
{
|
|||
|
|
ErrorMessage = "Tried to write past image size";
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
byte[] hash = checksumProvider.ComputeHash(data);
|
|||
|
|
|
|||
|
|
if(deduplicationTable.TryGetValue(hash, out ulong pointer))
|
|||
|
|
{
|
|||
|
|
SetDdtEntry(sectorAddress, pointer);
|
|||
|
|
ErrorMessage = "";
|
|||
|
|
return true;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// Close current block first
|
|||
|
|
if(blockStream != null &&
|
|||
|
|
(currentBlockHeader.sectorSize != data.Length ||
|
|||
|
|
compressedBlockStream.Length / currentBlockHeader.sectorSize == 1 << shift))
|
|||
|
|
{
|
|||
|
|
currentBlockHeader.length = (uint)compressedBlockStream.Length;
|
|||
|
|
currentBlockHeader.crc64 = BitConverter.ToUInt64(crc64.Final(), 0);
|
|||
|
|
compressedBlockStream.Close();
|
|||
|
|
currentBlockHeader.cmpLength = (uint)blockStream.Length;
|
|||
|
|
Crc64Context.Data(blockStream.ToArray(), out byte[] cmpCrc64);
|
|||
|
|
currentBlockHeader.cmpCrc64 = BitConverter.ToUInt64(cmpCrc64, 0);
|
|||
|
|
|
|||
|
|
structurePointer = Marshal.AllocHGlobal(Marshal.SizeOf(currentBlockHeader));
|
|||
|
|
structureBytes = new byte[Marshal.SizeOf(currentBlockHeader)];
|
|||
|
|
Marshal.StructureToPtr(currentBlockHeader, structurePointer, true);
|
|||
|
|
Marshal.Copy(structurePointer, structureBytes, 0, structureBytes.Length);
|
|||
|
|
Marshal.FreeHGlobal(structurePointer);
|
|||
|
|
imageStream.Write(structureBytes, 0, structureBytes.Length);
|
|||
|
|
structureBytes = null;
|
|||
|
|
imageStream.Write(blockStream.ToArray(), 0, (int)blockStream.Length);
|
|||
|
|
blockStream = null;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// No block set
|
|||
|
|
if(blockStream == null)
|
|||
|
|
{
|
|||
|
|
blockStream = new MemoryStream();
|
|||
|
|
compressedBlockStream = new LzmaStream(new LzmaEncoderProperties(), false, blockStream);
|
|||
|
|
currentBlockHeader = new BlockHeader
|
|||
|
|
{
|
|||
|
|
identifier = BlockType.DataBlock,
|
|||
|
|
type = DataType.UserData,
|
|||
|
|
compression = CompressionType.Lzma,
|
|||
|
|
sectorSize = (uint)data.Length
|
|||
|
|
};
|
|||
|
|
crc64 = new Crc64Context();
|
|||
|
|
crc64.Init();
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
long blockOffset = compressedBlockStream.Position / currentBlockHeader.sectorSize;
|
|||
|
|
ulong ddtEntry = (ulong)((imageStream.Position << shift) + blockOffset);
|
|||
|
|
deduplicationTable.Add(hash, ddtEntry);
|
|||
|
|
compressedBlockStream.Write(data, 0, data.Length);
|
|||
|
|
SetDdtEntry(sectorAddress, ddtEntry);
|
|||
|
|
crc64.Update(data);
|
|||
|
|
|
|||
|
|
ErrorMessage = "";
|
|||
|
|
return true;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// TODO: Optimize this
|
|||
|
|
public bool WriteSectors(byte[] data, ulong sectorAddress, uint length)
|
|||
|
|
{
|
|||
|
|
if(!IsWriting)
|
|||
|
|
{
|
|||
|
|
ErrorMessage = "Tried to write on a non-writable image";
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if(sectorAddress + length > Info.Sectors)
|
|||
|
|
{
|
|||
|
|
ErrorMessage = "Tried to write past image size";
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
uint sectorSize = (uint)(data.Length / length);
|
|||
|
|
|
|||
|
|
for(uint i = 0; i < length; i++)
|
|||
|
|
{
|
|||
|
|
byte[] tmp = new byte[sectorSize];
|
|||
|
|
Array.Copy(data, i * sectorSize, tmp, 0, sectorSize);
|
|||
|
|
if(!WriteSector(tmp, sectorAddress + i)) return false;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
ErrorMessage = "";
|
|||
|
|
return true;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// TODO: Implement
|
|||
|
|
public bool WriteSectorLong(byte[] data, ulong sectorAddress)
|
|||
|
|
{
|
|||
|
|
ErrorMessage = "Writing sectors with tags is not yet implemented.";
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// TODO: Implement
|
|||
|
|
public bool WriteSectorsLong(byte[] data, ulong sectorAddress, uint length)
|
|||
|
|
{
|
|||
|
|
ErrorMessage = "Writing sectors with tags is not yet implemented.";
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
public bool SetTracks(List<Track> tracks)
|
|||
|
|
{
|
|||
|
|
if(!IsWriting)
|
|||
|
|
{
|
|||
|
|
ErrorMessage = "Tried to write on a non-writable image";
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
Tracks = tracks;
|
|||
|
|
ErrorMessage = "";
|
|||
|
|
return true;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
public bool Close()
|
|||
|
|
{
|
|||
|
|
if(!IsWriting)
|
|||
|
|
{
|
|||
|
|
ErrorMessage = "Image is not opened for writing";
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// Close current block first
|
|||
|
|
if(blockStream != null)
|
|||
|
|
{
|
|||
|
|
currentBlockHeader.length = (uint)compressedBlockStream.Length;
|
|||
|
|
currentBlockHeader.crc64 = BitConverter.ToUInt64(crc64.Final(), 0);
|
|||
|
|
compressedBlockStream.Close();
|
|||
|
|
currentBlockHeader.cmpLength = (uint)blockStream.Length;
|
|||
|
|
Crc64Context.Data(blockStream.ToArray(), out byte[] cmpCrc64);
|
|||
|
|
currentBlockHeader.cmpCrc64 = BitConverter.ToUInt64(cmpCrc64, 0);
|
|||
|
|
|
|||
|
|
structurePointer = Marshal.AllocHGlobal(Marshal.SizeOf(currentBlockHeader));
|
|||
|
|
structureBytes = new byte[Marshal.SizeOf(currentBlockHeader)];
|
|||
|
|
Marshal.StructureToPtr(currentBlockHeader, structurePointer, true);
|
|||
|
|
Marshal.Copy(structurePointer, structureBytes, 0, structureBytes.Length);
|
|||
|
|
Marshal.FreeHGlobal(structurePointer);
|
|||
|
|
imageStream.Write(structureBytes, 0, structureBytes.Length);
|
|||
|
|
structureBytes = null;
|
|||
|
|
imageStream.Write(blockStream.ToArray(), 0, (int)blockStream.Length);
|
|||
|
|
blockStream = null;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
IndexEntry idxEntry;
|
|||
|
|
|
|||
|
|
foreach(KeyValuePair<MediaTagType, byte[]> mediaTag in mediaTags)
|
|||
|
|
{
|
|||
|
|
DataType dataType = GetDataTypeForMediaTag(mediaTag.Key);
|
|||
|
|
idxEntry = new IndexEntry
|
|||
|
|
{
|
|||
|
|
blockType = BlockType.DataBlock,
|
|||
|
|
dataType = dataType,
|
|||
|
|
offset = (ulong)imageStream.Position
|
|||
|
|
};
|
|||
|
|
|
|||
|
|
DicConsole.DebugWriteLine("DiscImageChef format plugin", "Writing tag type {0} to position {1}",
|
|||
|
|
mediaTag.Key, idxEntry.offset);
|
|||
|
|
|
|||
|
|
Crc64Context.Data(mediaTag.Value, out byte[] tagCrc);
|
|||
|
|
|
|||
|
|
BlockHeader tagBlock = new BlockHeader
|
|||
|
|
{
|
|||
|
|
identifier = BlockType.DataBlock,
|
|||
|
|
type = dataType,
|
|||
|
|
length = (uint)mediaTag.Value.Length,
|
|||
|
|
crc64 = BitConverter.ToUInt64(tagCrc, 0)
|
|||
|
|
};
|
|||
|
|
|
|||
|
|
blockStream = new MemoryStream();
|
|||
|
|
compressedBlockStream = new LzmaStream(new LzmaEncoderProperties(), false, blockStream);
|
|||
|
|
compressedBlockStream.Write(mediaTag.Value, 0, mediaTag.Value.Length);
|
|||
|
|
compressedBlockStream.Close();
|
|||
|
|
byte[] tagData;
|
|||
|
|
|
|||
|
|
// Not compressible
|
|||
|
|
if(blockStream.Length >= mediaTag.Value.Length)
|
|||
|
|
{
|
|||
|
|
tagBlock.cmpLength = tagBlock.length;
|
|||
|
|
tagBlock.cmpCrc64 = tagBlock.crc64;
|
|||
|
|
tagData = mediaTag.Value;
|
|||
|
|
tagBlock.compression = CompressionType.None;
|
|||
|
|
}
|
|||
|
|
else
|
|||
|
|
{
|
|||
|
|
tagData = blockStream.ToArray();
|
|||
|
|
Crc64Context.Data(tagData, out tagCrc);
|
|||
|
|
tagBlock.cmpLength = (uint)tagData.Length;
|
|||
|
|
tagBlock.cmpCrc64 = BitConverter.ToUInt64(tagCrc, 0);
|
|||
|
|
tagBlock.compression = CompressionType.Lzma;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
compressedBlockStream = null;
|
|||
|
|
blockStream = null;
|
|||
|
|
|
|||
|
|
structurePointer = Marshal.AllocHGlobal(Marshal.SizeOf(tagBlock));
|
|||
|
|
structureBytes = new byte[Marshal.SizeOf(tagBlock)];
|
|||
|
|
Marshal.StructureToPtr(tagBlock, structurePointer, true);
|
|||
|
|
Marshal.Copy(structurePointer, structureBytes, 0, structureBytes.Length);
|
|||
|
|
Marshal.FreeHGlobal(structurePointer);
|
|||
|
|
imageStream.Write(structureBytes, 0, structureBytes.Length);
|
|||
|
|
imageStream.Write(tagData, 0, tagData.Length);
|
|||
|
|
|
|||
|
|
index.Add(idxEntry);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if(geometryBlock.identifier == BlockType.GeometryBlock)
|
|||
|
|
{
|
|||
|
|
idxEntry = new IndexEntry
|
|||
|
|
{
|
|||
|
|
blockType = BlockType.GeometryBlock,
|
|||
|
|
dataType = DataType.NoData,
|
|||
|
|
offset = (ulong)imageStream.Position
|
|||
|
|
};
|
|||
|
|
|
|||
|
|
DicConsole.DebugWriteLine("DiscImageChef format plugin", "Writing geometry block to position {0}",
|
|||
|
|
idxEntry.offset);
|
|||
|
|
|
|||
|
|
structurePointer = Marshal.AllocHGlobal(Marshal.SizeOf(geometryBlock));
|
|||
|
|
structureBytes = new byte[Marshal.SizeOf(geometryBlock)];
|
|||
|
|
Marshal.StructureToPtr(geometryBlock, structurePointer, true);
|
|||
|
|
Marshal.Copy(structurePointer, structureBytes, 0, structureBytes.Length);
|
|||
|
|
Marshal.FreeHGlobal(structurePointer);
|
|||
|
|
imageStream.Write(structureBytes, 0, structureBytes.Length);
|
|||
|
|
|
|||
|
|
index.Add(idxEntry);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if(inMemoryDdt)
|
|||
|
|
{
|
|||
|
|
idxEntry = new IndexEntry
|
|||
|
|
{
|
|||
|
|
blockType = BlockType.DeDuplicationTable,
|
|||
|
|
dataType = DataType.NoData,
|
|||
|
|
offset = (ulong)imageStream.Position
|
|||
|
|
};
|
|||
|
|
|
|||
|
|
DicConsole.DebugWriteLine("DiscImageChef format plugin", "Writing user data DDT to position {0}",
|
|||
|
|
idxEntry.offset);
|
|||
|
|
|
|||
|
|
DdtHeader ddtHeader = new DdtHeader
|
|||
|
|
{
|
|||
|
|
identifier = BlockType.DeDuplicationTable,
|
|||
|
|
type = DataType.UserData,
|
|||
|
|
compression = CompressionType.Lzma,
|
|||
|
|
shift = shift,
|
|||
|
|
entries = (ulong)userDataDdt.LongLength,
|
|||
|
|
length = (ulong)(userDataDdt.LongLength * sizeof(ulong))
|
|||
|
|
};
|
|||
|
|
|
|||
|
|
blockStream = new MemoryStream();
|
|||
|
|
compressedBlockStream = new LzmaStream(new LzmaEncoderProperties(), false, blockStream);
|
|||
|
|
crc64 = new Crc64Context();
|
|||
|
|
crc64.Init();
|
|||
|
|
for(ulong i = 0; i < (ulong)userDataDdt.LongLength; i++)
|
|||
|
|
{
|
|||
|
|
byte[] ddtEntry = BitConverter.GetBytes(userDataDdt[i]);
|
|||
|
|
crc64.Update(ddtEntry);
|
|||
|
|
compressedBlockStream.Write(ddtEntry, 0, ddtEntry.Length);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
compressedBlockStream.Close();
|
|||
|
|
ddtHeader.cmpLength = (uint)blockStream.Length;
|
|||
|
|
Crc64Context.Data(blockStream.ToArray(), out byte[] cmpCrc64);
|
|||
|
|
ddtHeader.cmpCrc64 = BitConverter.ToUInt64(cmpCrc64, 0);
|
|||
|
|
|
|||
|
|
structurePointer = Marshal.AllocHGlobal(Marshal.SizeOf(ddtHeader));
|
|||
|
|
structureBytes = new byte[Marshal.SizeOf(ddtHeader)];
|
|||
|
|
Marshal.StructureToPtr(ddtHeader, structurePointer, true);
|
|||
|
|
Marshal.Copy(structurePointer, structureBytes, 0, structureBytes.Length);
|
|||
|
|
Marshal.FreeHGlobal(structurePointer);
|
|||
|
|
imageStream.Write(structureBytes, 0, structureBytes.Length);
|
|||
|
|
structureBytes = null;
|
|||
|
|
imageStream.Write(blockStream.ToArray(), 0, (int)blockStream.Length);
|
|||
|
|
blockStream = null;
|
|||
|
|
compressedBlockStream = null;
|
|||
|
|
|
|||
|
|
index.Add(idxEntry);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
header.indexOffset = (ulong)imageStream.Position;
|
|||
|
|
DicConsole.DebugWriteLine("DiscImageChef format plugin", "Writing index to position {0}",
|
|||
|
|
header.indexOffset);
|
|||
|
|
|
|||
|
|
blockStream = new MemoryStream();
|
|||
|
|
|
|||
|
|
foreach(IndexEntry entry in index)
|
|||
|
|
{
|
|||
|
|
structurePointer = Marshal.AllocHGlobal(Marshal.SizeOf(entry));
|
|||
|
|
structureBytes = new byte[Marshal.SizeOf(entry)];
|
|||
|
|
Marshal.StructureToPtr(entry, structurePointer, true);
|
|||
|
|
Marshal.Copy(structurePointer, structureBytes, 0, structureBytes.Length);
|
|||
|
|
Marshal.FreeHGlobal(structurePointer);
|
|||
|
|
blockStream.Write(structureBytes, 0, structureBytes.Length);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
Crc64Context.Data(blockStream.ToArray(), out byte[] idxCrc);
|
|||
|
|
|
|||
|
|
IndexHeader idxHeader = new IndexHeader
|
|||
|
|
{
|
|||
|
|
identifier = BlockType.Index,
|
|||
|
|
entries = (ushort)index.Count,
|
|||
|
|
crc64 = BitConverter.ToUInt64(idxCrc, 0)
|
|||
|
|
};
|
|||
|
|
|
|||
|
|
structurePointer = Marshal.AllocHGlobal(Marshal.SizeOf(idxHeader));
|
|||
|
|
structureBytes = new byte[Marshal.SizeOf(idxHeader)];
|
|||
|
|
Marshal.StructureToPtr(idxHeader, structurePointer, true);
|
|||
|
|
Marshal.Copy(structurePointer, structureBytes, 0, structureBytes.Length);
|
|||
|
|
Marshal.FreeHGlobal(structurePointer);
|
|||
|
|
imageStream.Write(structureBytes, 0, structureBytes.Length);
|
|||
|
|
imageStream.Write(blockStream.ToArray(), 0, (int)blockStream.Length);
|
|||
|
|
|
|||
|
|
DicConsole.DebugWriteLine("DiscImageChef format plugin", "Writing header");
|
|||
|
|
imageStream.Position = 0;
|
|||
|
|
structurePointer = Marshal.AllocHGlobal(Marshal.SizeOf(header));
|
|||
|
|
structureBytes = new byte[Marshal.SizeOf(header)];
|
|||
|
|
Marshal.StructureToPtr(header, structurePointer, true);
|
|||
|
|
Marshal.Copy(structurePointer, structureBytes, 0, structureBytes.Length);
|
|||
|
|
Marshal.FreeHGlobal(structurePointer);
|
|||
|
|
imageStream.Write(structureBytes, 0, structureBytes.Length);
|
|||
|
|
|
|||
|
|
imageStream.Flush();
|
|||
|
|
imageStream.Close();
|
|||
|
|
|
|||
|
|
IsWriting = false;
|
|||
|
|
ErrorMessage = "";
|
|||
|
|
return true;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// TODO: Implement
|
|||
|
|
public bool SetMetadata(ImageInfo metadata)
|
|||
|
|
{
|
|||
|
|
return true;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
public bool SetGeometry(uint cylinders, uint heads, uint sectorsPerTrack)
|
|||
|
|
{
|
|||
|
|
if(!IsWriting)
|
|||
|
|
{
|
|||
|
|
ErrorMessage = "Tried to write on a non-writable image";
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
geometryBlock = new GeometryBlock
|
|||
|
|
{
|
|||
|
|
identifier = BlockType.GeometryBlock,
|
|||
|
|
cylinders = cylinders,
|
|||
|
|
heads = heads,
|
|||
|
|
sectorsPerTrack = sectorsPerTrack
|
|||
|
|
};
|
|||
|
|
|
|||
|
|
ErrorMessage = "";
|
|||
|
|
return true;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// TODO: Implement
|
|||
|
|
public bool WriteSectorTag(byte[] data, ulong sectorAddress, SectorTagType tag)
|
|||
|
|
{
|
|||
|
|
ErrorMessage = "Writing sectors with tags is not yet implemented.";
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// TODO: Implement
|
|||
|
|
public bool WriteSectorsTag(byte[] data, ulong sectorAddress, uint length, SectorTagType tag)
|
|||
|
|
{
|
|||
|
|
ErrorMessage = "Writing sectors with tags is not yet implemented.";
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
void SetDdtEntry(ulong sectorAddress, ulong pointer)
|
|||
|
|
{
|
|||
|
|
if(inMemoryDdt)
|
|||
|
|
{
|
|||
|
|
userDataDdt[sectorAddress] = pointer;
|
|||
|
|
return;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
long oldPosition = imageStream.Position;
|
|||
|
|
imageStream.Position = outMemoryDdtPosition;
|
|||
|
|
imageStream.Position += (long)(sectorAddress * sizeof(ulong));
|
|||
|
|
imageStream.Write(BitConverter.GetBytes(pointer), 0, sizeof(ulong));
|
|||
|
|
imageStream.Position = oldPosition;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
static DataType GetDataTypeForMediaTag(MediaTagType tag)
|
|||
|
|
{
|
|||
|
|
switch(tag)
|
|||
|
|
{
|
|||
|
|
case MediaTagType.CD_TOC: return DataType.CompactDiscPartialToc;
|
|||
|
|
case MediaTagType.CD_SessionInfo: return DataType.CompactDiscSessionInfo;
|
|||
|
|
case MediaTagType.CD_FullTOC: return DataType.CompactDiscToc;
|
|||
|
|
case MediaTagType.CD_PMA: return DataType.CompactDiscPma;
|
|||
|
|
case MediaTagType.CD_ATIP: return DataType.CompactDiscAtip;
|
|||
|
|
case MediaTagType.CD_TEXT: return DataType.CompactDiscLeadInCdText;
|
|||
|
|
case MediaTagType.DVD_PFI: return DataType.DvdPfi;
|
|||
|
|
case MediaTagType.DVD_CMI: return DataType.DvdLeadInCmi;
|
|||
|
|
case MediaTagType.DVD_DiscKey: return DataType.DvdDiscKey;
|
|||
|
|
case MediaTagType.DVD_BCA: return DataType.DvdBca;
|
|||
|
|
case MediaTagType.DVD_DMI: return DataType.DvdDmi;
|
|||
|
|
case MediaTagType.DVD_MediaIdentifier: return DataType.DvdMediaIdentifier;
|
|||
|
|
case MediaTagType.DVD_MKB: return DataType.DvdMediaKeyBlock;
|
|||
|
|
case MediaTagType.DVDRAM_DDS: return DataType.DvdRamDds;
|
|||
|
|
case MediaTagType.DVDRAM_MediumStatus: return DataType.DvdRamMediumStatus;
|
|||
|
|
case MediaTagType.DVDRAM_SpareArea: return DataType.DvdRamSpareArea;
|
|||
|
|
case MediaTagType.DVDR_RMD: return DataType.DvdRRmd;
|
|||
|
|
case MediaTagType.DVDR_PreRecordedInfo: return DataType.DvdRPrerecordedInfo;
|
|||
|
|
case MediaTagType.DVDR_MediaIdentifier: return DataType.DvdRMediaIdentifier;
|
|||
|
|
case MediaTagType.DVDR_PFI: return DataType.DvdRPfi;
|
|||
|
|
case MediaTagType.DVD_ADIP: return DataType.DvdAdip;
|
|||
|
|
case MediaTagType.HDDVD_CPI: return DataType.HdDvdCpi;
|
|||
|
|
case MediaTagType.HDDVD_MediumStatus: return DataType.HdDvdMediumStatus;
|
|||
|
|
case MediaTagType.DVDDL_LayerCapacity: return DataType.DvdDlLayerCapacity;
|
|||
|
|
case MediaTagType.DVDDL_MiddleZoneAddress: return DataType.DvdDlMiddleZoneAddress;
|
|||
|
|
case MediaTagType.DVDDL_JumpIntervalSize: return DataType.DvdDlJumpIntervalSize;
|
|||
|
|
case MediaTagType.DVDDL_ManualLayerJumpLBA: return DataType.DvdDlManualLayerJumpLba;
|
|||
|
|
case MediaTagType.BD_DI: return DataType.BlurayDi;
|
|||
|
|
case MediaTagType.BD_BCA: return DataType.BlurayBca;
|
|||
|
|
case MediaTagType.BD_DDS: return DataType.BlurayDds;
|
|||
|
|
case MediaTagType.BD_CartridgeStatus: return DataType.BlurayCartridgeStatus;
|
|||
|
|
case MediaTagType.BD_SpareArea: return DataType.BluraySpareArea;
|
|||
|
|
case MediaTagType.AACS_VolumeIdentifier: return DataType.AacsVolumeIdentifier;
|
|||
|
|
case MediaTagType.AACS_SerialNumber: return DataType.AacsSerialNumber;
|
|||
|
|
case MediaTagType.AACS_MediaIdentifier: return DataType.AacsMediaIdentifier;
|
|||
|
|
case MediaTagType.AACS_MKB: return DataType.AacsMediaKeyBlock;
|
|||
|
|
case MediaTagType.AACS_DataKeys: return DataType.AacsDataKeys;
|
|||
|
|
case MediaTagType.AACS_LBAExtents: return DataType.AacsLbaExtents;
|
|||
|
|
case MediaTagType.AACS_CPRM_MKB: return DataType.CprmMediaKeyBlock;
|
|||
|
|
case MediaTagType.Hybrid_RecognizedLayers: return DataType.HybridRecognizedLayers;
|
|||
|
|
case MediaTagType.MMC_WriteProtection: return DataType.ScsiMmcWriteProtection;
|
|||
|
|
case MediaTagType.MMC_DiscInformation: return DataType.ScsiMmcDiscInformation;
|
|||
|
|
case MediaTagType.MMC_TrackResourcesInformation: return DataType.ScsiMmcTrackResourcesInformation;
|
|||
|
|
case MediaTagType.MMC_POWResourcesInformation: return DataType.ScsiMmcPowResourcesInformation;
|
|||
|
|
case MediaTagType.SCSI_INQUIRY: return DataType.ScsiInquiry;
|
|||
|
|
case MediaTagType.SCSI_MODEPAGE_2A: return DataType.ScsiModePage2A;
|
|||
|
|
case MediaTagType.ATA_IDENTIFY: return DataType.AtaIdentify;
|
|||
|
|
case MediaTagType.ATAPI_IDENTIFY: return DataType.AtapiIdentify;
|
|||
|
|
case MediaTagType.PCMCIA_CIS: return DataType.PcmciaCis;
|
|||
|
|
case MediaTagType.SD_CID: return DataType.SecureDigitalCid;
|
|||
|
|
case MediaTagType.SD_CSD: return DataType.SecureDigitalCsd;
|
|||
|
|
case MediaTagType.SD_SCR: return DataType.SecureDigitalScr;
|
|||
|
|
case MediaTagType.SD_OCR: return DataType.SecureDigitalOcr;
|
|||
|
|
case MediaTagType.MMC_CID: return DataType.MultiMediaCardCid;
|
|||
|
|
case MediaTagType.MMC_CSD: return DataType.MultiMediaCardCsd;
|
|||
|
|
case MediaTagType.MMC_OCR: return DataType.MultiMediaCardOcr;
|
|||
|
|
case MediaTagType.MMC_ExtendedCSD: return DataType.MultiMediaCardExtendedCsd;
|
|||
|
|
case MediaTagType.Xbox_SecuritySector: return DataType.XboxSecuritySector;
|
|||
|
|
case MediaTagType.Floppy_LeadOut: return DataType.FloppyLeadOut;
|
|||
|
|
case MediaTagType.DCB: return DataType.DvdDiscControlBlock;
|
|||
|
|
case MediaTagType.CD_LeadIn: return DataType.CompactDiscLeadIn;
|
|||
|
|
case MediaTagType.CD_LeadOut: return DataType.CompactDiscLeadOut;
|
|||
|
|
case MediaTagType.SCSI_MODESENSE_6: return DataType.ScsiModeSense6;
|
|||
|
|
case MediaTagType.SCSI_MODESENSE_10: return DataType.ScsiModeSense10;
|
|||
|
|
case MediaTagType.USB_Descriptors: return DataType.UsbDescriptors;
|
|||
|
|
case MediaTagType.Xbox_DMI: return DataType.XboxDmi;
|
|||
|
|
case MediaTagType.Xbox_PFI: return DataType.XboxPfi;
|
|||
|
|
default:
|
|||
|
|
throw new ArgumentOutOfRangeException(nameof(tag), tag, null);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
enum CompressionType : ushort
|
|||
|
|
{
|
|||
|
|
None = 0,
|
|||
|
|
Lzma = 1
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
enum DataType : ushort
|
|||
|
|
{
|
|||
|
|
NoData = 0,
|
|||
|
|
UserData = 1,
|
|||
|
|
CompactDiscPartialToc = 2,
|
|||
|
|
CompactDiscSessionInfo = 3,
|
|||
|
|
CompactDiscToc = 4,
|
|||
|
|
CompactDiscPma = 5,
|
|||
|
|
CompactDiscAtip = 6,
|
|||
|
|
CompactDiscLeadInCdText = 7,
|
|||
|
|
DvdPfi = 8,
|
|||
|
|
DvdLeadInCmi = 9,
|
|||
|
|
DvdDiscKey = 10,
|
|||
|
|
DvdBca = 11,
|
|||
|
|
DvdDmi = 12,
|
|||
|
|
DvdMediaIdentifier = 13,
|
|||
|
|
DvdMediaKeyBlock = 14,
|
|||
|
|
DvdRamDds = 15,
|
|||
|
|
DvdRamMediumStatus = 16,
|
|||
|
|
DvdRamSpareArea = 17,
|
|||
|
|
DvdRRmd = 18,
|
|||
|
|
DvdRPrerecordedInfo = 19,
|
|||
|
|
DvdRMediaIdentifier = 20,
|
|||
|
|
DvdRPfi = 21,
|
|||
|
|
DvdAdip = 22,
|
|||
|
|
HdDvdCpi = 23,
|
|||
|
|
HdDvdMediumStatus = 24,
|
|||
|
|
DvdDlLayerCapacity = 25,
|
|||
|
|
DvdDlMiddleZoneAddress = 26,
|
|||
|
|
DvdDlJumpIntervalSize = 27,
|
|||
|
|
DvdDlManualLayerJumpLba = 28,
|
|||
|
|
BlurayDi = 29,
|
|||
|
|
BlurayBca = 30,
|
|||
|
|
BlurayDds = 31,
|
|||
|
|
BlurayCartridgeStatus = 32,
|
|||
|
|
BluraySpareArea = 33,
|
|||
|
|
AacsVolumeIdentifier = 34,
|
|||
|
|
AacsSerialNumber = 35,
|
|||
|
|
AacsMediaIdentifier = 36,
|
|||
|
|
AacsMediaKeyBlock = 37,
|
|||
|
|
AacsDataKeys = 38,
|
|||
|
|
AacsLbaExtents = 39,
|
|||
|
|
CprmMediaKeyBlock = 40,
|
|||
|
|
HybridRecognizedLayers = 41,
|
|||
|
|
ScsiMmcWriteProtection = 42,
|
|||
|
|
ScsiMmcDiscInformation = 43,
|
|||
|
|
ScsiMmcTrackResourcesInformation = 44,
|
|||
|
|
ScsiMmcPowResourcesInformation = 45,
|
|||
|
|
ScsiInquiry = 46,
|
|||
|
|
ScsiModePage2A = 47,
|
|||
|
|
AtaIdentify = 48,
|
|||
|
|
AtapiIdentify = 49,
|
|||
|
|
PcmciaCis = 50,
|
|||
|
|
SecureDigitalCid = 51,
|
|||
|
|
SecureDigitalCsd = 52,
|
|||
|
|
SecureDigitalScr = 53,
|
|||
|
|
SecureDigitalOcr = 54,
|
|||
|
|
MultiMediaCardCid = 55,
|
|||
|
|
MultiMediaCardCsd = 56,
|
|||
|
|
MultiMediaCardOcr = 57,
|
|||
|
|
MultiMediaCardExtendedCsd = 58,
|
|||
|
|
XboxSecuritySector = 59,
|
|||
|
|
FloppyLeadOut = 60,
|
|||
|
|
DvdDiscControlBlock = 61,
|
|||
|
|
CompactDiscLeadIn = 62,
|
|||
|
|
CompactDiscLeadOut = 63,
|
|||
|
|
ScsiModeSense6 = 64,
|
|||
|
|
ScsiModeSense10 = 65,
|
|||
|
|
UsbDescriptors = 66,
|
|||
|
|
XboxDmi = 67,
|
|||
|
|
XboxPfi = 68
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
enum BlockType : uint
|
|||
|
|
{
|
|||
|
|
DataBlock = 0x484B4C42,
|
|||
|
|
DeDuplicationTable = 0x48544444,
|
|||
|
|
Index = 0x48584449,
|
|||
|
|
GeometryBlock = 0x4D4F4547
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>Header, at start of file</summary>
|
|||
|
|
[StructLayout(LayoutKind.Sequential, Pack = 1, CharSet = CharSet.Unicode)]
|
|||
|
|
struct DicHeader
|
|||
|
|
{
|
|||
|
|
/// <summary>Header identifier, <see cref="DIC_MAGIC" /></summary>
|
|||
|
|
public ulong identifier;
|
|||
|
|
/// <summary>UTF-16 name of the application that created the image</summary>
|
|||
|
|
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)]
|
|||
|
|
public string application;
|
|||
|
|
/// <summary>Image format major version. A new major version means a possibly incompatible change of format</summary>
|
|||
|
|
public byte imageMajorVersion;
|
|||
|
|
/// <summary>Image format minor version. A new minor version indicates a compatible change of format</summary>
|
|||
|
|
public byte imageMinorVersion;
|
|||
|
|
/// <summary>Major version of the application that created the image</summary>
|
|||
|
|
public byte applicationMajorVersion;
|
|||
|
|
/// <summary>Minor version of the application that created the image</summary>
|
|||
|
|
public byte applicationMinorVersion;
|
|||
|
|
/// <summary>Type of media contained on image</summary>
|
|||
|
|
public MediaType mediaType;
|
|||
|
|
/// <summary>Offset to index</summary>
|
|||
|
|
public ulong indexOffset;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>Header for a deduplication table. Table follows it</summary>
|
|||
|
|
[StructLayout(LayoutKind.Sequential, Pack = 1)]
|
|||
|
|
struct DdtHeader
|
|||
|
|
{
|
|||
|
|
/// <summary>Identifier, <see cref="BlockType.DeDuplicationTable" /></summary>
|
|||
|
|
public BlockType identifier;
|
|||
|
|
/// <summary>Type of data pointed by this DDT</summary>
|
|||
|
|
public DataType type;
|
|||
|
|
/// <summary>Compression algorithm used to compress the DDT</summary>
|
|||
|
|
public CompressionType compression;
|
|||
|
|
/// <summary>Each entry is ((byte offset in file) << shift) + (sector offset in block)</summary>
|
|||
|
|
public byte shift;
|
|||
|
|
/// <summary>How many entries are in the table</summary>
|
|||
|
|
public ulong entries;
|
|||
|
|
/// <summary>Compressed length for the DDT</summary>
|
|||
|
|
public ulong cmpLength;
|
|||
|
|
/// <summary>Uncompressed length for the DDT</summary>
|
|||
|
|
public ulong length;
|
|||
|
|
/// <summary>CRC64-ECMA of the compressed DDT</summary>
|
|||
|
|
public ulong cmpCrc64;
|
|||
|
|
/// <summary>CRC64-ECMA of the uncompressed DDT</summary>
|
|||
|
|
public ulong crc64;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>Header for the index, followed by entries</summary>
|
|||
|
|
[StructLayout(LayoutKind.Sequential, Pack = 1)]
|
|||
|
|
struct IndexHeader
|
|||
|
|
{
|
|||
|
|
/// <summary>Identifier, <see cref="BlockType.Index" /></summary>
|
|||
|
|
public BlockType identifier;
|
|||
|
|
/// <summary>How many entries follow this header</summary>
|
|||
|
|
public ushort entries;
|
|||
|
|
/// <summary>CRC64-ECMA of the index</summary>
|
|||
|
|
public ulong crc64;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>Index entry</summary>
|
|||
|
|
[StructLayout(LayoutKind.Sequential, Pack = 1)]
|
|||
|
|
struct IndexEntry
|
|||
|
|
{
|
|||
|
|
/// <summary>Type of item pointed by this entry</summary>
|
|||
|
|
public BlockType blockType;
|
|||
|
|
/// <summary>Type of data contained by the block pointed by this entry</summary>
|
|||
|
|
public DataType dataType;
|
|||
|
|
/// <summary>Offset in file where item is stored</summary>
|
|||
|
|
public ulong offset;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>Block header, precedes block data</summary>
|
|||
|
|
[StructLayout(LayoutKind.Sequential, Pack = 1)]
|
|||
|
|
struct BlockHeader
|
|||
|
|
{
|
|||
|
|
/// <summary>Identifier, <see cref="BlockType.DataBlock" /></summary>
|
|||
|
|
public BlockType identifier;
|
|||
|
|
/// <summary>Type of data contained by this block</summary>
|
|||
|
|
public DataType type;
|
|||
|
|
/// <summary>Compression algorithm used to compress the block</summary>
|
|||
|
|
public CompressionType compression;
|
|||
|
|
/// <summary>Size in bytes of each sector contained in this block</summary>
|
|||
|
|
public uint sectorSize;
|
|||
|
|
/// <summary>Compressed length for the block</summary>
|
|||
|
|
public uint cmpLength;
|
|||
|
|
/// <summary>Uncompressed length for the block</summary>
|
|||
|
|
public uint length;
|
|||
|
|
/// <summary>CRC64-ECMA of the compressed block</summary>
|
|||
|
|
public ulong cmpCrc64;
|
|||
|
|
/// <summary>CRC64-ECMA of the uncompressed block</summary>
|
|||
|
|
public ulong crc64;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>Geometry block, contains physical geometry information</summary>
|
|||
|
|
[StructLayout(LayoutKind.Sequential, Pack = 1)]
|
|||
|
|
struct GeometryBlock
|
|||
|
|
{
|
|||
|
|
/// <summary>Identifier, <see cref="BlockType.GeometryBlock" /></summary>
|
|||
|
|
public BlockType identifier;
|
|||
|
|
public uint cylinders;
|
|||
|
|
public uint heads;
|
|||
|
|
public uint sectorsPerTrack;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|