mirror of
https://github.com/aaru-dps/Aaru.git
synced 2025-12-16 19:24:25 +00:00
Natalia Portillo
828c1e3da0
Introduces constant fields for respective debug module names, replacing the hardcoded ones. This is done to standardize the naming convention, reduce redundancy and potentially avoid any typos or name mismatches across the project. This change makes the code more maintainable and easier to update in case module names need to be changed.
938 lines
34 KiB
C#
938 lines
34 KiB
C#
// /***************************************************************************
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// Aaru Data Preservation Suite
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// ----------------------------------------------------------------------------
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//
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// Filename : Read.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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// Reads Dreamcast GDI disc 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 © 2011-2023 Natalia Portillo
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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.Text.RegularExpressions;
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using Aaru.CommonTypes;
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using Aaru.CommonTypes.Enums;
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using Aaru.CommonTypes.Interfaces;
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using Aaru.CommonTypes.Structs;
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using Aaru.Console;
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using Aaru.Decoders.CD;
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using Session = Aaru.CommonTypes.Structs.Session;
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namespace Aaru.DiscImages;
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public sealed partial class Gdi
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{
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/// <inheritdoc />
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public ErrorNumber Open(IFilter imageFilter)
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{
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if(imageFilter == null)
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return ErrorNumber.NoSuchFile;
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try
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{
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imageFilter.GetDataForkStream().Seek(0, SeekOrigin.Begin);
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_gdiStream = new StreamReader(imageFilter.GetDataForkStream());
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int lineNumber = 0;
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bool highDensity = false;
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// Initialize all RegExs
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var regexTrack = new Regex(REGEX_TRACK);
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// Initialize all RegEx matches
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// Initialize disc
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_discImage = new GdiDisc
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{
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Sessions = new List<Session>(),
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Tracks = new List<GdiTrack>()
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};
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ulong currentStart = 0;
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_offsetMap = new Dictionary<uint, ulong>();
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_densitySeparationSectors = 0;
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while(_gdiStream.Peek() >= 0)
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{
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lineNumber++;
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string line = _gdiStream.ReadLine();
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if(lineNumber == 1)
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{
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if(int.TryParse(line, out _))
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continue;
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AaruConsole.ErrorWriteLine(Localization.Not_a_correct_Dreamcast_GDI_image);
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return ErrorNumber.InvalidArgument;
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}
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Match trackMatch = regexTrack.Match(line ?? "");
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if(!trackMatch.Success)
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{
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AaruConsole.ErrorWriteLine(string.Format(Localization.Unknown_line_0_at_line_1, line, lineNumber));
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return ErrorNumber.InvalidArgument;
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}
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AaruConsole.DebugWriteLine(MODULE_NAME,
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Localization.
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Found_track_0_starts_at_1_flags_2_type_3_file_4_offset_5_at_line_6,
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trackMatch.Groups["track"].Value, trackMatch.Groups["start"].Value,
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trackMatch.Groups["flags"].Value, trackMatch.Groups["type"].Value,
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trackMatch.Groups["filename"].Value, trackMatch.Groups["offset"].Value,
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lineNumber);
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var filtersList = new FiltersList();
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var currentTrack = new GdiTrack
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{
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Bps = ushort.Parse(trackMatch.Groups["type"].Value),
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Flags = byte.Parse(trackMatch.Groups["flags"].Value),
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Offset = long.Parse(trackMatch.Groups["offset"].Value),
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Sequence = uint.Parse(trackMatch.Groups["track"].Value),
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StartSector = ulong.Parse(trackMatch.Groups["start"].Value),
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TrackFilter = filtersList.GetFilter(Path.Combine(imageFilter.ParentFolder,
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trackMatch.Groups["filename"].Value.
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Replace("\\\"", "\"").Trim('"')))
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};
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currentTrack.TrackFile = currentTrack.TrackFilter.Filename;
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if(currentTrack.StartSector - currentStart > 0)
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if(currentTrack.StartSector == 45000)
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{
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highDensity = true;
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_offsetMap.Add(0, currentStart);
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_densitySeparationSectors = currentTrack.StartSector - currentStart;
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currentStart = currentTrack.StartSector;
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}
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else
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{
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currentTrack.Pregap = currentTrack.StartSector - currentStart;
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currentTrack.StartSector -= currentTrack.StartSector - currentStart;
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}
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if((currentTrack.TrackFilter.DataForkLength - currentTrack.Offset) % currentTrack.Bps != 0)
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{
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AaruConsole.ErrorWriteLine(Localization.Track_size_not_a_multiple_of_sector_size);
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return ErrorNumber.InvalidArgument;
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}
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currentTrack.Sectors = (ulong)((currentTrack.TrackFilter.DataForkLength - currentTrack.Offset) /
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currentTrack.Bps);
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currentTrack.Sectors += currentTrack.Pregap;
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currentStart += currentTrack.Sectors;
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currentTrack.HighDensity = highDensity;
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currentTrack.TrackType = (currentTrack.Flags & 0x4) == 0x4 ? TrackType.CdMode1 : TrackType.Audio;
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_discImage.Tracks.Add(currentTrack);
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}
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Session[] sessions = new Session[2];
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for(int s = 0; s < sessions.Length; s++)
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if(s == 0)
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{
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sessions[s].Sequence = 1;
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foreach(GdiTrack trk in _discImage.Tracks.Where(trk => !trk.HighDensity))
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{
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if(sessions[s].StartTrack == 0)
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sessions[s].StartTrack = trk.Sequence;
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else if(sessions[s].StartTrack > trk.Sequence)
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sessions[s].StartTrack = trk.Sequence;
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if(sessions[s].EndTrack < trk.Sequence)
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sessions[s].EndTrack = trk.Sequence;
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if(sessions[s].StartSector > trk.StartSector)
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sessions[s].StartSector = trk.StartSector;
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if(sessions[s].EndSector < trk.Sectors + trk.StartSector - 1)
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sessions[s].EndSector = trk.Sectors + trk.StartSector - 1;
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}
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}
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else
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{
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sessions[s].Sequence = 2;
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foreach(GdiTrack trk in _discImage.Tracks.Where(trk => trk.HighDensity))
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{
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if(sessions[s].StartTrack == 0)
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sessions[s].StartTrack = trk.Sequence;
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else if(sessions[s].StartTrack > trk.Sequence)
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sessions[s].StartTrack = trk.Sequence;
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if(sessions[s].EndTrack < trk.Sequence)
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sessions[s].EndTrack = trk.Sequence;
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if(sessions[s].StartSector > trk.StartSector)
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sessions[s].StartSector = trk.StartSector;
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if(sessions[s].EndSector < trk.Sectors + trk.StartSector - 1)
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sessions[s].EndSector = trk.Sectors + trk.StartSector - 1;
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}
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}
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_discImage.Sessions.Add(sessions[0]);
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_discImage.Sessions.Add(sessions[1]);
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_discImage.Disktype = MediaType.GDROM;
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// DEBUG information
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AaruConsole.DebugWriteLine(MODULE_NAME, Localization.Disc_image_parsing_results);
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AaruConsole.DebugWriteLine(MODULE_NAME, Localization.Session_information);
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AaruConsole.DebugWriteLine(MODULE_NAME, "\t" + Localization.Disc_contains_0_sessions,
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_discImage.Sessions.Count);
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for(int i = 0; i < _discImage.Sessions.Count; i++)
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{
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AaruConsole.DebugWriteLine(MODULE_NAME, "\t" + Localization.Session_0_information, i + 1);
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AaruConsole.DebugWriteLine(MODULE_NAME, "\t\t" + Localization.Starting_track_0,
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_discImage.Sessions[i].StartTrack);
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AaruConsole.DebugWriteLine(MODULE_NAME, "\t\t" + Localization.Starting_sector_0,
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_discImage.Sessions[i].StartSector);
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AaruConsole.DebugWriteLine(MODULE_NAME, "\t\t" + Localization.Ending_track_0,
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_discImage.Sessions[i].EndTrack);
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AaruConsole.DebugWriteLine(MODULE_NAME, "\t\t" + Localization.Ending_sector_0,
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_discImage.Sessions[i].EndSector);
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}
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AaruConsole.DebugWriteLine(MODULE_NAME, Localization.Track_information);
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AaruConsole.DebugWriteLine(MODULE_NAME, "\t" + Localization.Disc_contains_0_tracks,
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_discImage.Tracks.Count);
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for(int i = 0; i < _discImage.Tracks.Count; i++)
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{
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AaruConsole.DebugWriteLine(MODULE_NAME, "\t" + Localization.Track_0_information,
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_discImage.Tracks[i].Sequence);
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AaruConsole.DebugWriteLine(MODULE_NAME, "\t\t" + Localization._0_bytes_per_sector,
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_discImage.Tracks[i].Bps);
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AaruConsole.DebugWriteLine(MODULE_NAME, "\t\t" + Localization.Pregap_0_sectors,
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_discImage.Tracks[i].Pregap);
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if((_discImage.Tracks[i].Flags & 0x8) == 0x8)
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AaruConsole.DebugWriteLine(MODULE_NAME, "\t\t" + Localization.Track_is_flagged_as_quadraphonic);
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if((_discImage.Tracks[i].Flags & 0x4) == 0x4)
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AaruConsole.DebugWriteLine(MODULE_NAME, "\t\t" + Localization.Track_is_data);
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if((_discImage.Tracks[i].Flags & 0x2) == 0x2)
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AaruConsole.DebugWriteLine(MODULE_NAME, "\t\t" + Localization.Track_allows_digital_copy);
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if((_discImage.Tracks[i].Flags & 0x1) == 0x1)
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AaruConsole.DebugWriteLine(MODULE_NAME, "\t\t" + Localization.Track_has_pre_emphasis_applied);
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AaruConsole.DebugWriteLine(MODULE_NAME,
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"\t\t" + Localization.
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Track_resides_in_file_0_type_defined_as_1_starting_at_byte_2,
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_discImage.Tracks[i].TrackFilter, _discImage.Tracks[i].TrackType,
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_discImage.Tracks[i].Offset);
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}
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AaruConsole.DebugWriteLine(MODULE_NAME, Localization.Building_offset_map);
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Partitions = new List<Partition>();
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ulong byteOffset = 0;
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for(int i = 0; i < _discImage.Tracks.Count; i++)
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{
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if(_discImage.Tracks[i].Sequence == 1 &&
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i != 0)
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{
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AaruConsole.ErrorWriteLine(Localization.Unordered_tracks);
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return ErrorNumber.InvalidArgument;
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}
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// Index 01
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var partition = new Partition
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{
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Description = string.Format(Localization.Track_0, _discImage.Tracks[i].Sequence),
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Name = null,
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Start = _discImage.Tracks[i].StartSector,
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Size = _discImage.Tracks[i].Sectors * _discImage.Tracks[i].Bps,
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Length = _discImage.Tracks[i].Sectors,
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Sequence = _discImage.Tracks[i].Sequence,
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Offset = byteOffset,
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Type = _discImage.Tracks[i].TrackType.ToString()
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};
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byteOffset += partition.Size;
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_offsetMap.Add(_discImage.Tracks[i].Sequence, partition.Start);
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Partitions.Add(partition);
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}
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foreach(GdiTrack track in _discImage.Tracks)
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_imageInfo.ImageSize += track.Bps * track.Sectors;
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foreach(GdiTrack track in _discImage.Tracks)
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_imageInfo.Sectors += track.Sectors;
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_imageInfo.Sectors += _densitySeparationSectors;
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_imageInfo.SectorSize = 2352; // All others
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foreach(GdiTrack unused in
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_discImage.Tracks.Where(track => (track.Flags & 0x4) == 0x4 && track.Bps == 2352))
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{
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_imageInfo.ReadableSectorTags.Add(SectorTagType.CdSectorSync);
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_imageInfo.ReadableSectorTags.Add(SectorTagType.CdSectorHeader);
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_imageInfo.ReadableSectorTags.Add(SectorTagType.CdSectorSubHeader);
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_imageInfo.ReadableSectorTags.Add(SectorTagType.CdSectorEcc);
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_imageInfo.ReadableSectorTags.Add(SectorTagType.CdSectorEccP);
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_imageInfo.ReadableSectorTags.Add(SectorTagType.CdSectorEccQ);
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_imageInfo.ReadableSectorTags.Add(SectorTagType.CdSectorEdc);
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}
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_imageInfo.CreationTime = imageFilter.CreationTime;
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_imageInfo.LastModificationTime = imageFilter.LastWriteTime;
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_imageInfo.MediaType = _discImage.Disktype;
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_imageInfo.ReadableSectorTags.Add(SectorTagType.CdTrackFlags);
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_imageInfo.MetadataMediaType = MetadataMediaType.OpticalDisc;
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AaruConsole.VerboseWriteLine(Localization.GDI_image_describes_a_disc_of_type_0, _imageInfo.MediaType);
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_sectorBuilder = new SectorBuilder();
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return ErrorNumber.NoError;
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}
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catch(Exception ex)
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{
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AaruConsole.ErrorWriteLine(Localization.Exception_trying_to_identify_image_file_0, imageFilter.BasePath);
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AaruConsole.ErrorWriteLine(Localization.Exception_0, ex);
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return ErrorNumber.UnexpectedException;
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}
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}
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/// <inheritdoc />
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public ErrorNumber ReadSector(ulong sectorAddress, out byte[] buffer) => ReadSectors(sectorAddress, 1, out buffer);
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/// <inheritdoc />
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public ErrorNumber ReadSectorTag(ulong sectorAddress, SectorTagType tag, out byte[] buffer) =>
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ReadSectorsTag(sectorAddress, 1, tag, out buffer);
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/// <inheritdoc />
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public ErrorNumber ReadSector(ulong sectorAddress, uint track, out byte[] buffer) =>
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ReadSectors(sectorAddress, 1, track, out buffer);
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/// <inheritdoc />
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public ErrorNumber ReadSectorTag(ulong sectorAddress, uint track, SectorTagType tag, out byte[] buffer) =>
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ReadSectorsTag(sectorAddress, 1, track, tag, out buffer);
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/// <inheritdoc />
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public ErrorNumber ReadSectors(ulong sectorAddress, uint length, out byte[] buffer)
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{
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buffer = null;
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foreach(KeyValuePair<uint, ulong> kvp in from kvp in _offsetMap where sectorAddress >= kvp.Value
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from gdiTrack in _discImage.Tracks where gdiTrack.Sequence == kvp.Key
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where sectorAddress - kvp.Value < gdiTrack.Sectors select kvp)
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return ReadSectors(sectorAddress - kvp.Value, length, kvp.Key, out buffer);
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_offsetMap.TryGetValue(0, out ulong transitionStart);
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if(sectorAddress < transitionStart ||
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sectorAddress >= _densitySeparationSectors + transitionStart)
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return ErrorNumber.SectorNotFound;
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return ReadSectors(sectorAddress - transitionStart, length, 0, out buffer);
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}
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/// <inheritdoc />
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public ErrorNumber ReadSectorsTag(ulong sectorAddress, uint length, SectorTagType tag, out byte[] buffer)
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{
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buffer = null;
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foreach(KeyValuePair<uint, ulong> kvp in from kvp in _offsetMap where sectorAddress >= kvp.Value
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from gdiTrack in _discImage.Tracks where gdiTrack.Sequence == kvp.Key
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where sectorAddress - kvp.Value < gdiTrack.Sectors select kvp)
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return ReadSectorsTag(sectorAddress - kvp.Value, length, kvp.Key, tag, out buffer);
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_offsetMap.TryGetValue(0, out ulong transitionStart);
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if(sectorAddress < transitionStart ||
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sectorAddress >= _densitySeparationSectors + transitionStart)
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return ErrorNumber.SectorNotFound;
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return ReadSectorsTag(sectorAddress - transitionStart, length, 0, tag, out buffer);
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}
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/// <inheritdoc />
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public ErrorNumber ReadSectors(ulong sectorAddress, uint length, uint track, out byte[] buffer)
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{
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buffer = null;
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if(track == 0)
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{
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if(sectorAddress + length > _densitySeparationSectors)
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return ErrorNumber.OutOfRange;
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buffer = new byte[length * 2352];
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return ErrorNumber.NoError;
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}
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var aaruTrack = new GdiTrack
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{
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Sequence = 0
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};
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foreach(GdiTrack gdiTrack in _discImage.Tracks.Where(gdiTrack => gdiTrack.Sequence == track))
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{
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aaruTrack = gdiTrack;
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break;
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}
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if(aaruTrack.Sequence == 0)
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return ErrorNumber.SectorNotFound;
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if(sectorAddress + length > aaruTrack.Sectors)
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return ErrorNumber.OutOfRange;
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uint sectorOffset;
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uint sectorSize;
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uint sectorSkip;
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switch(aaruTrack.TrackType)
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{
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case TrackType.Audio:
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{
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sectorOffset = 0;
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sectorSize = 2352;
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sectorSkip = 0;
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break;
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}
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case TrackType.CdMode1:
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{
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if(aaruTrack.Bps == 2352)
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{
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sectorOffset = 16;
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sectorSize = 2048;
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sectorSkip = 288;
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}
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else
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{
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sectorOffset = 0;
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sectorSize = 2048;
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sectorSkip = 0;
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}
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break;
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}
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default: return ErrorNumber.NotSupported;
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}
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buffer = new byte[sectorSize * length];
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ulong remainingSectors = length;
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if(aaruTrack.Pregap > 0 &&
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sectorAddress < aaruTrack.Pregap)
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{
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ulong remainingPregap = aaruTrack.Pregap - sectorAddress;
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remainingSectors -= length > remainingPregap ? remainingPregap : length;
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}
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if(remainingSectors == 0)
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return ErrorNumber.NoError;
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_imageStream = aaruTrack.TrackFilter.GetDataForkStream();
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var br = new BinaryReader(_imageStream);
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long pos = aaruTrack.Offset + (long)((sectorAddress * (sectorOffset + sectorSize + sectorSkip)) -
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(aaruTrack.Pregap * aaruTrack.Bps));
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if(pos < 0)
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pos = 0;
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br.BaseStream.Seek(pos, SeekOrigin.Begin);
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switch(sectorOffset)
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|
{
|
|
case 0 when sectorSkip == 0 && remainingSectors == length:
|
|
buffer = br.ReadBytes((int)(sectorSize * remainingSectors));
|
|
|
|
break;
|
|
case 0 when sectorSkip == 0:
|
|
{
|
|
byte[] tmp = br.ReadBytes((int)(sectorSize * remainingSectors));
|
|
Array.Copy(tmp, 0, buffer, (int)((length - remainingSectors) * sectorSize), tmp.Length);
|
|
|
|
break;
|
|
}
|
|
default:
|
|
{
|
|
int bufferPos = (int)((length - remainingSectors) * sectorSize);
|
|
|
|
for(ulong i = 0; i < remainingSectors; i++)
|
|
{
|
|
br.BaseStream.Seek(sectorOffset, SeekOrigin.Current);
|
|
byte[] sector = br.ReadBytes((int)sectorSize);
|
|
br.BaseStream.Seek(sectorSkip, SeekOrigin.Current);
|
|
Array.Copy(sector, 0, buffer, bufferPos, sectorSize);
|
|
bufferPos += (int)sectorSize;
|
|
}
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
return ErrorNumber.NoError;
|
|
}
|
|
|
|
/// <inheritdoc />
|
|
public ErrorNumber ReadSectorsTag(ulong sectorAddress, uint length, uint track, SectorTagType tag,
|
|
out byte[] buffer)
|
|
{
|
|
buffer = null;
|
|
|
|
if(tag == SectorTagType.CdTrackFlags)
|
|
track = (uint)sectorAddress;
|
|
|
|
if(track == 0)
|
|
{
|
|
if(sectorAddress + length > _densitySeparationSectors)
|
|
return ErrorNumber.OutOfRange;
|
|
|
|
if(tag != SectorTagType.CdTrackFlags)
|
|
return ErrorNumber.NotSupported;
|
|
|
|
buffer = new byte[]
|
|
{
|
|
0x00
|
|
};
|
|
|
|
return ErrorNumber.NoError;
|
|
}
|
|
|
|
var aaruTrack = new GdiTrack
|
|
{
|
|
Sequence = 0
|
|
};
|
|
|
|
foreach(GdiTrack gdiTrack in _discImage.Tracks.Where(gdiTrack => gdiTrack.Sequence == track))
|
|
{
|
|
aaruTrack = gdiTrack;
|
|
|
|
break;
|
|
}
|
|
|
|
if(aaruTrack.Sequence == 0)
|
|
return ErrorNumber.SectorNotFound;
|
|
|
|
if(length > aaruTrack.Sectors)
|
|
return ErrorNumber.OutOfRange;
|
|
|
|
uint sectorOffset = 0;
|
|
uint sectorSize = 0;
|
|
uint sectorSkip = 0;
|
|
|
|
switch(tag)
|
|
{
|
|
case SectorTagType.CdSectorEcc:
|
|
case SectorTagType.CdSectorEccP:
|
|
case SectorTagType.CdSectorEccQ:
|
|
case SectorTagType.CdSectorEdc:
|
|
case SectorTagType.CdSectorHeader:
|
|
case SectorTagType.CdSectorSync: break;
|
|
case SectorTagType.CdTrackFlags:
|
|
{
|
|
buffer = new byte[1];
|
|
|
|
buffer[0] += aaruTrack.Flags;
|
|
|
|
return ErrorNumber.NoError;
|
|
}
|
|
default: return ErrorNumber.NotSupported;
|
|
}
|
|
|
|
switch(aaruTrack.TrackType)
|
|
{
|
|
case TrackType.Audio: return ErrorNumber.NoData;
|
|
case TrackType.CdMode1:
|
|
{
|
|
// TODO: Build
|
|
if(aaruTrack.Bps != 2352)
|
|
return ErrorNumber.NoData;
|
|
|
|
switch(tag)
|
|
{
|
|
case SectorTagType.CdSectorSync:
|
|
{
|
|
sectorOffset = 0;
|
|
sectorSize = 12;
|
|
sectorSkip = 2340;
|
|
|
|
break;
|
|
}
|
|
case SectorTagType.CdSectorHeader:
|
|
{
|
|
sectorOffset = 12;
|
|
sectorSize = 4;
|
|
sectorSkip = 2336;
|
|
|
|
break;
|
|
}
|
|
case SectorTagType.CdSectorEcc:
|
|
{
|
|
sectorOffset = 2076;
|
|
sectorSize = 276;
|
|
sectorSkip = 0;
|
|
|
|
break;
|
|
}
|
|
case SectorTagType.CdSectorEccP:
|
|
{
|
|
sectorOffset = 2076;
|
|
sectorSize = 172;
|
|
sectorSkip = 104;
|
|
|
|
break;
|
|
}
|
|
case SectorTagType.CdSectorEccQ:
|
|
{
|
|
sectorOffset = 2248;
|
|
sectorSize = 104;
|
|
sectorSkip = 0;
|
|
|
|
break;
|
|
}
|
|
case SectorTagType.CdSectorEdc:
|
|
{
|
|
sectorOffset = 2064;
|
|
sectorSize = 4;
|
|
sectorSkip = 284;
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
break;
|
|
}
|
|
default: return ErrorNumber.NotSupported;
|
|
}
|
|
|
|
buffer = new byte[sectorSize * length];
|
|
|
|
ulong remainingSectors = length;
|
|
|
|
if(aaruTrack.Pregap > 0 &&
|
|
sectorAddress < aaruTrack.Pregap)
|
|
{
|
|
ulong remainingPregap = aaruTrack.Pregap - sectorAddress;
|
|
|
|
remainingSectors -= length > remainingPregap ? remainingPregap : length;
|
|
}
|
|
|
|
if(remainingSectors == 0)
|
|
return ErrorNumber.NoError;
|
|
|
|
_imageStream = aaruTrack.TrackFilter.GetDataForkStream();
|
|
var br = new BinaryReader(_imageStream);
|
|
|
|
long pos = aaruTrack.Offset + (long)((sectorAddress * (sectorOffset + sectorSize + sectorSkip)) -
|
|
(aaruTrack.Pregap * aaruTrack.Bps));
|
|
|
|
if(pos < 0)
|
|
pos = 0;
|
|
|
|
br.BaseStream.Seek(pos, SeekOrigin.Begin);
|
|
|
|
switch(sectorOffset)
|
|
{
|
|
case 0 when sectorSkip == 0 && remainingSectors == length:
|
|
buffer = br.ReadBytes((int)(sectorSize * remainingSectors));
|
|
|
|
break;
|
|
case 0 when sectorSkip == 0:
|
|
{
|
|
byte[] tmp = br.ReadBytes((int)(sectorSize * remainingSectors));
|
|
Array.Copy(tmp, 0, buffer, (int)((length - remainingSectors) * sectorSize), tmp.Length);
|
|
|
|
break;
|
|
}
|
|
default:
|
|
{
|
|
int bufferPos = (int)((length - remainingSectors) * sectorSize);
|
|
|
|
for(ulong i = 0; i < remainingSectors; i++)
|
|
{
|
|
br.BaseStream.Seek(sectorOffset, SeekOrigin.Current);
|
|
byte[] sector = br.ReadBytes((int)sectorSize);
|
|
br.BaseStream.Seek(sectorSkip, SeekOrigin.Current);
|
|
Array.Copy(sector, 0, buffer, bufferPos, sectorSize);
|
|
bufferPos += (int)sectorSize;
|
|
}
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
return ErrorNumber.NoError;
|
|
}
|
|
|
|
/// <inheritdoc />
|
|
public ErrorNumber ReadSectorLong(ulong sectorAddress, out byte[] buffer) =>
|
|
ReadSectorsLong(sectorAddress, 1, out buffer);
|
|
|
|
/// <inheritdoc />
|
|
public ErrorNumber ReadSectorLong(ulong sectorAddress, uint track, out byte[] buffer) =>
|
|
ReadSectorsLong(sectorAddress, 1, track, out buffer);
|
|
|
|
/// <inheritdoc />
|
|
public ErrorNumber ReadSectorsLong(ulong sectorAddress, uint length, out byte[] buffer)
|
|
{
|
|
buffer = null;
|
|
|
|
foreach(KeyValuePair<uint, ulong> kvp in from kvp in _offsetMap where sectorAddress >= kvp.Value
|
|
from gdiTrack in _discImage.Tracks where gdiTrack.Sequence == kvp.Key
|
|
where sectorAddress - kvp.Value < gdiTrack.Sectors select kvp)
|
|
return ReadSectorsLong(sectorAddress - kvp.Value, length, kvp.Key, out buffer);
|
|
|
|
return ErrorNumber.SectorNotFound;
|
|
}
|
|
|
|
/// <inheritdoc />
|
|
public ErrorNumber ReadSectorsLong(ulong sectorAddress, uint length, uint track, out byte[] buffer)
|
|
{
|
|
buffer = null;
|
|
|
|
if(track == 0)
|
|
{
|
|
if(sectorAddress + length > _densitySeparationSectors)
|
|
return ErrorNumber.OutOfRange;
|
|
|
|
buffer = new byte[length * 2352];
|
|
|
|
return ErrorNumber.NoError;
|
|
}
|
|
|
|
var aaruTrack = new GdiTrack
|
|
{
|
|
Sequence = 0
|
|
};
|
|
|
|
foreach(GdiTrack gdiTrack in _discImage.Tracks.Where(gdiTrack => gdiTrack.Sequence == track))
|
|
{
|
|
aaruTrack = gdiTrack;
|
|
|
|
break;
|
|
}
|
|
|
|
if(aaruTrack.Sequence == 0)
|
|
return ErrorNumber.SectorNotFound;
|
|
|
|
if(sectorAddress + length > aaruTrack.Sectors)
|
|
return ErrorNumber.OutOfRange;
|
|
|
|
uint sectorOffset;
|
|
uint sectorSize;
|
|
uint sectorSkip;
|
|
|
|
switch(aaruTrack.TrackType)
|
|
{
|
|
case TrackType.Audio:
|
|
{
|
|
sectorOffset = 0;
|
|
sectorSize = 2352;
|
|
sectorSkip = 0;
|
|
|
|
break;
|
|
}
|
|
case TrackType.CdMode1:
|
|
{
|
|
if(aaruTrack.Bps == 2352)
|
|
{
|
|
sectorOffset = 0;
|
|
sectorSize = 2352;
|
|
sectorSkip = 0;
|
|
}
|
|
else
|
|
{
|
|
sectorOffset = 0;
|
|
sectorSize = 2048;
|
|
sectorSkip = 0;
|
|
}
|
|
|
|
break;
|
|
}
|
|
default: return ErrorNumber.NotSupported;
|
|
}
|
|
|
|
buffer = new byte[sectorSize * length];
|
|
|
|
ulong remainingSectors = length;
|
|
|
|
if(aaruTrack.Pregap > 0 &&
|
|
sectorAddress < aaruTrack.Pregap)
|
|
{
|
|
ulong remainingPregap = aaruTrack.Pregap - sectorAddress;
|
|
|
|
remainingSectors -= length > remainingPregap ? remainingPregap : length;
|
|
}
|
|
|
|
if(remainingSectors == 0)
|
|
return ErrorNumber.NoError;
|
|
|
|
_imageStream = aaruTrack.TrackFilter.GetDataForkStream();
|
|
var br = new BinaryReader(_imageStream);
|
|
|
|
long pos = aaruTrack.Offset + (long)((sectorAddress * (sectorOffset + sectorSize + sectorSkip)) -
|
|
(aaruTrack.Pregap * aaruTrack.Bps));
|
|
|
|
if(pos < 0)
|
|
pos = 0;
|
|
|
|
br.BaseStream.Seek(pos, SeekOrigin.Begin);
|
|
|
|
switch(sectorOffset)
|
|
{
|
|
case 0 when sectorSkip == 0 && remainingSectors == length:
|
|
buffer = br.ReadBytes((int)(sectorSize * remainingSectors));
|
|
|
|
break;
|
|
case 0 when sectorSkip == 0:
|
|
{
|
|
byte[] tmp = br.ReadBytes((int)(sectorSize * remainingSectors));
|
|
Array.Copy(tmp, 0, buffer, (int)((length - remainingSectors) * sectorSize), tmp.Length);
|
|
|
|
break;
|
|
}
|
|
default:
|
|
{
|
|
int bufferPos = (int)((length - remainingSectors) * sectorSize);
|
|
|
|
for(ulong i = 0; i < remainingSectors; i++)
|
|
{
|
|
br.BaseStream.Seek(sectorOffset, SeekOrigin.Current);
|
|
byte[] sector = br.ReadBytes((int)sectorSize);
|
|
br.BaseStream.Seek(sectorSkip, SeekOrigin.Current);
|
|
Array.Copy(sector, 0, buffer, bufferPos, sectorSize);
|
|
bufferPos += (int)sectorSize;
|
|
}
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
switch(aaruTrack.TrackType)
|
|
{
|
|
case TrackType.CdMode1 when aaruTrack.Bps == 2048:
|
|
{
|
|
byte[] fullSector = new byte[2352];
|
|
byte[] fullBuffer = new byte[2352 * length];
|
|
|
|
for(uint i = 0; i < length; i++)
|
|
{
|
|
Array.Copy(buffer, i * 2048, fullSector, 16, 2048);
|
|
_sectorBuilder.ReconstructPrefix(ref fullSector, TrackType.CdMode1, (long)(sectorAddress + i));
|
|
_sectorBuilder.ReconstructEcc(ref fullSector, TrackType.CdMode1);
|
|
Array.Copy(fullSector, 0, fullBuffer, i * 2352, 2352);
|
|
}
|
|
|
|
buffer = fullBuffer;
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
return ErrorNumber.NoError;
|
|
}
|
|
|
|
/// <inheritdoc />
|
|
public List<Track> GetSessionTracks(Session session) =>
|
|
_discImage.Sessions.Contains(session) ? GetSessionTracks(session.Sequence) : null;
|
|
|
|
/// <inheritdoc />
|
|
public List<Track> GetSessionTracks(ushort session)
|
|
{
|
|
List<Track> tracks = new();
|
|
bool expectedDensity;
|
|
|
|
switch(session)
|
|
{
|
|
case 1:
|
|
expectedDensity = false;
|
|
|
|
break;
|
|
case 2:
|
|
expectedDensity = true;
|
|
|
|
break;
|
|
default: return null;
|
|
}
|
|
|
|
foreach(GdiTrack gdiTrack in _discImage.Tracks)
|
|
if(gdiTrack.HighDensity == expectedDensity)
|
|
{
|
|
var track = new Track
|
|
{
|
|
Description = null,
|
|
StartSector = gdiTrack.StartSector,
|
|
Pregap = gdiTrack.Pregap,
|
|
Session = (ushort)(gdiTrack.HighDensity ? 2 : 1),
|
|
Sequence = gdiTrack.Sequence,
|
|
Type = gdiTrack.TrackType,
|
|
Filter = gdiTrack.TrackFilter,
|
|
File = gdiTrack.TrackFile,
|
|
FileOffset = (ulong)gdiTrack.Offset,
|
|
FileType = "BINARY",
|
|
RawBytesPerSector = gdiTrack.Bps,
|
|
BytesPerSector = gdiTrack.TrackType == TrackType.Data ? 2048 : 2352,
|
|
SubchannelType = TrackSubchannelType.None
|
|
};
|
|
|
|
track.EndSector = track.StartSector + gdiTrack.Sectors - 1;
|
|
|
|
tracks.Add(track);
|
|
}
|
|
|
|
return tracks;
|
|
}
|
|
} |