mirror of
https://github.com/aaru-dps/Aaru.git
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801 lines
32 KiB
C#
801 lines
32 KiB
C#
// /***************************************************************************
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// Aaru Data Preservation Suite
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// ----------------------------------------------------------------------------
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//
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// Filename : Pregap.cs
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// Author(s) : Natalia Portillo <claunia@claunia.com>
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//
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// Component : CompactDisc dumping.
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//
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// --[ Description ] ----------------------------------------------------------
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//
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// Calculates CompactDisc track pregaps.
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//
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// --[ License ] --------------------------------------------------------------
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as
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// published by the Free Software Foundation, either version 3 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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//
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// ----------------------------------------------------------------------------
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// Copyright © 2011-2022 Natalia Portillo
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// ****************************************************************************/
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// ReSharper disable JoinDeclarationAndInitializer
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// ReSharper disable InlineOutVariableDeclaration
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// ReSharper disable TooWideLocalVariableScope
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namespace Aaru.Core.Devices.Dumping;
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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 Aaru.Checksums;
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using Aaru.CommonTypes;
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using Aaru.CommonTypes.Enums;
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using Aaru.CommonTypes.Structs;
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using Aaru.Console;
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using Aaru.Core.Logging;
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using Aaru.Devices;
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partial class Dump
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{
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// TODO: Fix offset
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/// <summary>Reads the first track pregap from a CompactDisc</summary>
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/// <param name="blockSize">Block size in bytes</param>
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/// <param name="currentSpeed">Current speed</param>
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/// <param name="mediaTags">List of media tags</param>
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/// <param name="supportedSubchannel">Subchannel the drive can read</param>
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/// <param name="totalDuration">Total time spent sending commands to a drive</param>
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void ReadCdFirstTrackPregap(uint blockSize, ref double currentSpeed, Dictionary<MediaTagType, byte[]> mediaTags,
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MmcSubchannel supportedSubchannel, ref double totalDuration)
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{
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bool sense; // Sense indicator
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byte[] cmdBuf; // Data buffer
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double cmdDuration; // Command execution time
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DateTime timeSpeedStart; // Time of start for speed calculation
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ulong sectorSpeedStart = 0; // Used to calculate correct speed
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var gotFirstTrackPregap = false;
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var firstTrackPregapSectorsGood = 0;
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var firstTrackPregapMs = new MemoryStream();
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_dumpLog.WriteLine("Reading first track pregap");
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UpdateStatus?.Invoke("Reading first track pregap");
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InitProgress?.Invoke();
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timeSpeedStart = DateTime.UtcNow;
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for(int firstTrackPregapBlock = -150; firstTrackPregapBlock < 0 && _resume.NextBlock == 0;
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firstTrackPregapBlock++)
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{
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if(_aborted)
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{
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_dumpLog.WriteLine("Aborted!");
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UpdateStatus?.Invoke("Aborted!");
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break;
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}
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PulseProgress?.
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Invoke($"Trying to read first track pregap sector {firstTrackPregapBlock} ({currentSpeed:F3} MiB/sec.)");
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// ReSharper disable IntVariableOverflowInUncheckedContext
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sense = _dev.ReadCd(out cmdBuf, out _, (uint)firstTrackPregapBlock, blockSize, 1, MmcSectorTypes.AllTypes,
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false, false, true, MmcHeaderCodes.AllHeaders, true, true, MmcErrorField.None,
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supportedSubchannel, _dev.Timeout, out cmdDuration);
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// ReSharper restore IntVariableOverflowInUncheckedContext
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if(!sense &&
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!_dev.Error)
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{
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firstTrackPregapMs.Write(cmdBuf, 0, (int)blockSize);
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gotFirstTrackPregap = true;
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firstTrackPregapSectorsGood++;
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totalDuration += cmdDuration;
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}
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else
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{
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// Write empty data
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if(gotFirstTrackPregap)
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firstTrackPregapMs.Write(new byte[blockSize], 0, (int)blockSize);
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}
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sectorSpeedStart++;
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double elapsed = (DateTime.UtcNow - timeSpeedStart).TotalSeconds;
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if(elapsed <= 0)
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continue;
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currentSpeed = sectorSpeedStart * blockSize / (1048576 * elapsed);
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sectorSpeedStart = 0;
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timeSpeedStart = DateTime.UtcNow;
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}
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if(firstTrackPregapSectorsGood > 0)
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mediaTags.Add(MediaTagType.CD_FirstTrackPregap, firstTrackPregapMs.ToArray());
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EndProgress?.Invoke();
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UpdateStatus?.Invoke($"Got {firstTrackPregapSectorsGood} first track pregap sectors.");
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_dumpLog.WriteLine("Got {0} first track pregap sectors.", firstTrackPregapSectorsGood);
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firstTrackPregapMs.Close();
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}
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/// <summary>Calculate track pregaps</summary>
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/// <param name="dev">Device</param>
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/// <param name="dumpLog">Dumping log</param>
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/// <param name="updateStatus">Progress update callback</param>
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/// <param name="tracks">List of tracks</param>
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/// <param name="supportsPqSubchannel">Set if drive supports reading PQ subchannel</param>
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/// <param name="supportsRwSubchannel">Set if drive supports reading RW subchannel</param>
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/// <param name="dbDev">Database entry for device</param>
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/// <param name="inexactPositioning">Set if we found the drive does not return the exact subchannel we requested</param>
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/// <param name="dumping">Set if dumping, otherwise media info</param>
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public static void SolveTrackPregaps(Device dev, DumpLog dumpLog, UpdateStatusHandler updateStatus, Track[] tracks,
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bool supportsPqSubchannel, bool supportsRwSubchannel,
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Database.Models.Device dbDev, out bool inexactPositioning, bool dumping)
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{
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var sense = true; // Sense indicator
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byte[] subBuf = null;
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int posQ;
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uint retries;
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bool? bcd = null;
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byte[] crc;
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var pregaps = new Dictionary<uint, int>();
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inexactPositioning = false;
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if(!supportsPqSubchannel &&
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!supportsRwSubchannel)
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return;
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// Check if subchannel is BCD
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for(retries = 0; retries < 10; retries++)
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{
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sense = supportsRwSubchannel ? GetSectorForPregapRaw(dev, 11, dbDev, out subBuf, false)
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: GetSectorForPregapQ16(dev, 11, out subBuf, false);
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if(sense)
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continue;
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bcd = (subBuf[9] & 0x10) > 0;
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break;
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}
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AaruConsole.DebugWriteLine("Pregap calculator", bcd == true
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? "Subchannel is BCD"
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: bcd == false
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? "Subchannel is not BCD"
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: "Could not detect drive subchannel BCD");
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if(bcd is null)
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{
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dumpLog?.WriteLine("Could not detect if drive subchannel is BCD or not, pregaps could not be calculated, dump may be incorrect...");
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updateStatus?.
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Invoke("Could not detect if drive subchannel is BCD or not, pregaps could not be calculated, dump may be incorrect...");
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return;
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}
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// Initialize the dictionary
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foreach(Track t in tracks)
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pregaps[t.Sequence] = 0;
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for(var t = 0; t < tracks.Length; t++)
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{
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Track track = tracks[t];
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var trackRetries = 0;
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// First track of each session has at least 150 sectors of pregap and is not always readable
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if(tracks.Where(trk => trk.Session == track.Session).OrderBy(trk => trk.Sequence).FirstOrDefault().
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Sequence == track.Sequence)
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{
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AaruConsole.DebugWriteLine("Pregap calculator", "Skipping track {0}", track.Sequence);
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if(track.Sequence > 1)
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pregaps[track.Sequence] = 150;
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continue;
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}
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if(t > 0 &&
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tracks[t - 1].Type == tracks[t].Type &&
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dumping)
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{
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AaruConsole.DebugWriteLine("Pregap calculator", "Skipping track {0}", track.Sequence);
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continue;
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}
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if(dumping && dev.Manufacturer.ToLowerInvariant().StartsWith("plextor", StringComparison.Ordinal))
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{
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AaruConsole.DebugWriteLine("Pregap calculator", "Skipping track {0} due to Plextor firmware bug",
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track.Sequence);
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continue;
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}
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AaruConsole.DebugWriteLine("Pregap calculator", "Track {0}", track.Sequence);
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int lba = (int)track.StartSector - 1;
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var pregapFound = false;
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Track previousTrack = tracks.FirstOrDefault(trk => trk.Sequence == track.Sequence - 1);
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var goneBack = false;
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var goFront = false;
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var forward = false;
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var crcOk = false;
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var previousPregapIsPreviousTrack = false;
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// Check if pregap is 0
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for(retries = 0; retries < 10 && !pregapFound; retries++)
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{
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sense = supportsRwSubchannel
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? GetSectorForPregapRaw(dev, (uint)lba, dbDev, out subBuf, track.Type == TrackType.Audio)
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: GetSectorForPregapQ16(dev, (uint)lba, out subBuf, track.Type == TrackType.Audio);
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if(sense)
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{
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AaruConsole.DebugWriteLine("Pregap calculator", "LBA: {0}, Try {1}, Sense {2}", lba, retries + 1,
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sense);
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continue;
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}
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if(bcd == false)
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BinaryToBcdQ(subBuf);
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CRC16CCITTContext.Data(subBuf, 10, out crc);
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AaruConsole.DebugWriteLine("Pregap calculator",
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"LBA: {0}, Try {1}, Sense {2}, Q: {3:X2} {4:X2} {5:X2} {6:X2} {7:X2} {8:X2} {9:X2} {10:X2} {11:X2} {12:X2} CRC 0x{13:X2}{14:X2}, Calculated CRC: 0x{15:X2}{16:X2}",
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lba, retries + 1, sense, subBuf[0], subBuf[1], subBuf[2], subBuf[3],
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subBuf[4], subBuf[5], subBuf[6], subBuf[7], subBuf[8], subBuf[9], subBuf[10],
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subBuf[11], crc[0], crc[1]);
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crcOk = crc[0] == subBuf[10] && crc[1] == subBuf[11];
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// Try to do a simple correction
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if(!crcOk)
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{
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// Data track cannot have 11xxb in CONTROL
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if((subBuf[0] & 0x40) > 0)
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subBuf[0] &= 0x7F;
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// ADR only uses two bits
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subBuf[0] &= 0xF3;
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// Don't care about other Q modes
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if((subBuf[0] & 0xF) == 1)
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{
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// ZERO only used in DDCD
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subBuf[6] = 0;
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// Fix BCD numbering
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for(var i = 1; i < 10; i++)
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{
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if((subBuf[i] & 0xF0) > 0xA0)
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subBuf[i] &= 0x7F;
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if((subBuf[i] & 0x0F) > 0x0A)
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subBuf[i] &= 0xF7;
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}
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}
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CRC16CCITTContext.Data(subBuf, 10, out crc);
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crcOk = crc[0] == subBuf[10] && crc[1] == subBuf[11];
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if(crcOk)
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AaruConsole.DebugWriteLine("Pregap calculator",
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"LBA: {0}, Try {1}, Sense {2}, Q (FIXED): {3:X2} {4:X2} {5:X2} {6:X2} {7:X2} {8:X2} {9:X2} {10:X2} {11:X2} {12:X2} CRC 0x{13:X2}{14:X2}, Calculated CRC: 0x{15:X2}{16:X2}",
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lba, retries + 1, sense, subBuf[0], subBuf[1], subBuf[2], subBuf[3],
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subBuf[4], subBuf[5], subBuf[6], subBuf[7], subBuf[8], subBuf[9],
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subBuf[10], subBuf[11], crc[0], crc[1]);
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else
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continue;
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}
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BcdToBinaryQ(subBuf);
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// Q position
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if((subBuf[0] & 0xF) != 1)
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continue;
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posQ = subBuf[7] * 60 * 75 + subBuf[8] * 75 + subBuf[9] - 150;
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if(subBuf[1] != track.Sequence - 1 ||
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subBuf[2] == 0 ||
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posQ != lba)
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break;
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pregaps[track.Sequence] = 0;
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pregapFound = true;
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}
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if(pregapFound)
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continue;
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// Calculate pregap
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lba = (int)track.StartSector - 150;
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while(lba > (int)previousTrack.StartSector &&
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lba <= (int)track.StartSector)
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{
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// Some drives crash if you try to read just before the previous read, so seek away first
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if(!forward)
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sense = supportsRwSubchannel
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? GetSectorForPregapRaw(dev, (uint)lba - 10, dbDev, out subBuf,
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track.Type == TrackType.Audio)
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: GetSectorForPregapQ16(dev, (uint)lba - 10, out subBuf, track.Type == TrackType.Audio);
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for(retries = 0; retries < 10; retries++)
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{
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sense = supportsRwSubchannel
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? GetSectorForPregapRaw(dev, (uint)lba, dbDev, out subBuf,
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track.Type == TrackType.Audio)
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: GetSectorForPregapQ16(dev, (uint)lba, out subBuf, track.Type == TrackType.Audio);
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if(sense)
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continue;
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if(bcd == false)
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BinaryToBcdQ(subBuf);
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CRC16CCITTContext.Data(subBuf, 10, out crc);
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AaruConsole.DebugWriteLine("Pregap calculator",
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"LBA: {0}, Try {1}, Sense {2}, Q: {3:X2} {4:X2} {5:X2} {6:X2} {7:X2} {8:X2} {9:X2} {10:X2} {11:X2} {12:X2} CRC 0x{13:X2}{14:X2}, Calculated CRC: 0x{15:X2}{16:X2}",
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lba, retries + 1, sense, subBuf[0], subBuf[1], subBuf[2], subBuf[3],
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subBuf[4], subBuf[5], subBuf[6], subBuf[7], subBuf[8], subBuf[9],
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subBuf[10], subBuf[11], crc[0], crc[1]);
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crcOk = crc[0] == subBuf[10] && crc[1] == subBuf[11];
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// Try to do a simple correction
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if(!crcOk)
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{
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// Data track cannot have 11xxb in CONTROL
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if((subBuf[0] & 0x40) > 0)
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subBuf[0] &= 0x7F;
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// ADR only uses two bits
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subBuf[0] &= 0xF3;
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// Don't care about other Q modes
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if((subBuf[0] & 0xF) == 1)
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{
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// ZERO only used in DDCD
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subBuf[6] = 0;
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// Fix BCD numbering
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for(var i = 1; i < 10; i++)
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{
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if((subBuf[i] & 0xF0) > 0xA0)
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subBuf[i] &= 0x7F;
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if((subBuf[i] & 0x0F) > 0x0A)
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subBuf[i] &= 0xF7;
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}
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}
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CRC16CCITTContext.Data(subBuf, 10, out crc);
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crcOk = crc[0] == subBuf[10] && crc[1] == subBuf[11];
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if(crcOk)
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{
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AaruConsole.DebugWriteLine("Pregap calculator",
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"LBA: {0}, Try {1}, Sense {2}, Q (FIXED): {3:X2} {4:X2} {5:X2} {6:X2} {7:X2} {8:X2} {9:X2} {10:X2} {11:X2} {12:X2} CRC 0x{13:X2}{14:X2}, Calculated CRC: 0x{15:X2}{16:X2}",
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lba, retries + 1, sense, subBuf[0], subBuf[1], subBuf[2],
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subBuf[3], subBuf[4], subBuf[5], subBuf[6], subBuf[7], subBuf[8],
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subBuf[9], subBuf[10], subBuf[11], crc[0], crc[1]);
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break;
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}
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}
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if(crcOk)
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break;
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}
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if(retries == 10)
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{
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if(sense)
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{
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trackRetries++;
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if(trackRetries >= 10)
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{
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if(pregaps[track.Sequence] == 0)
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{
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if(previousTrack.Type == TrackType.Audio && track.Type != TrackType.Audio ||
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previousTrack.Type != TrackType.Audio && track.Type == TrackType.Audio)
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{
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dumpLog?.
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WriteLine("Could not read subchannel for this track, supposing 150 sectors.");
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updateStatus?.
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Invoke("Could not read subchannel for this track, supposing 150 sectors.");
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}
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else
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{
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dumpLog?.
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WriteLine("Could not read subchannel for this track, supposing 0 sectors.");
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updateStatus?.
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Invoke("Could not read subchannel for this track, supposing 0 sectors.");
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}
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}
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else
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{
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dumpLog?.
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WriteLine($"Could not read subchannel for this track, supposing {pregaps[track.Sequence]} sectors.");
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updateStatus?.
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Invoke($"Could not read subchannel for this track, supposing {pregaps[track.Sequence]} sectors.");
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}
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break;
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}
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dumpLog?.WriteLine($"Could not read subchannel for sector {lba}");
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updateStatus?.Invoke($"Could not read subchannel for sector {lba}");
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lba++;
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forward = true;
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continue;
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}
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dumpLog?.WriteLine($"Could not get correct subchannel for sector {lba}");
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updateStatus?.Invoke($"Could not get correct subchannel for sector {lba}");
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}
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if(subBuf.All(b => b == 0))
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{
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inexactPositioning = true;
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AaruConsole.DebugWriteLine("Pregap calculator", "All Q empty for LBA {0}", lba);
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break;
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}
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BcdToBinaryQ(subBuf);
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// If it's not Q position
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if((subBuf[0] & 0xF) != 1)
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{
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// This means we already searched back, so search forward
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if(goFront)
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{
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lba++;
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forward = true;
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if(lba == (int)previousTrack.StartSector)
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break;
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continue;
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}
|
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|
|
// Search back
|
|
goneBack = true;
|
|
lba--;
|
|
forward = false;
|
|
|
|
continue;
|
|
}
|
|
|
|
// Previous track
|
|
if(subBuf[1] < track.Sequence)
|
|
{
|
|
lba++;
|
|
forward = true;
|
|
previousPregapIsPreviousTrack = true;
|
|
|
|
// Already gone back, so go forward
|
|
if(goneBack)
|
|
goFront = true;
|
|
|
|
continue;
|
|
}
|
|
|
|
// Same track, but not pregap
|
|
if(subBuf[1] == track.Sequence &&
|
|
subBuf[2] > 0)
|
|
{
|
|
lba--;
|
|
forward = false;
|
|
|
|
if(previousPregapIsPreviousTrack)
|
|
break;
|
|
|
|
continue;
|
|
}
|
|
|
|
previousPregapIsPreviousTrack = false;
|
|
|
|
// Pregap according to Q position
|
|
posQ = subBuf[7] * 60 * 75 + subBuf[8] * 75 + subBuf[9] - 150;
|
|
int diff = posQ - lba;
|
|
int pregapQ = (int)track.StartSector - lba;
|
|
|
|
if(diff != 0)
|
|
{
|
|
AaruConsole.DebugWriteLine("Pregap calculator", "Invalid Q position for LBA {0}, got {1}", lba,
|
|
posQ);
|
|
|
|
inexactPositioning = true;
|
|
}
|
|
|
|
// Received a Q post the LBA we wanted, just go back. If we are already going forward, break
|
|
if(posQ > lba)
|
|
{
|
|
if(forward)
|
|
break;
|
|
|
|
lba--;
|
|
|
|
continue;
|
|
}
|
|
|
|
// Bigger than known change, otherwise we found it
|
|
if(pregapQ > pregaps[track.Sequence])
|
|
{
|
|
// If CRC is not OK, only accept pregaps less than 10 sectors longer than previously now
|
|
if(crcOk || pregapQ - pregaps[track.Sequence] < 10)
|
|
{
|
|
AaruConsole.DebugWriteLine("Pregap calculator", "Pregap for track {0}: {1}", track.Sequence,
|
|
pregapQ);
|
|
|
|
pregaps[track.Sequence] = pregapQ;
|
|
}
|
|
|
|
// We are going forward, so we have already been in the previous track, so add 1 to pregap and get out of here
|
|
else if(forward)
|
|
{
|
|
pregaps[track.Sequence]++;
|
|
|
|
break;
|
|
}
|
|
}
|
|
else if(pregapQ == pregaps[track.Sequence])
|
|
break;
|
|
|
|
lba--;
|
|
forward = false;
|
|
}
|
|
}
|
|
|
|
foreach(Track trk in tracks)
|
|
{
|
|
trk.Pregap = (ulong)pregaps[trk.Sequence];
|
|
|
|
// Do not reduce pregap, or starting position of session's first track
|
|
if(tracks.Where(t => t.Session == trk.Session).OrderBy(t => t.Sequence).FirstOrDefault().Sequence ==
|
|
trk.Sequence)
|
|
continue;
|
|
|
|
if(dumping)
|
|
{
|
|
// Minus five, to ensure dumping will fix if there is a pregap LBA 0
|
|
var red = 5;
|
|
|
|
while(trk.Pregap > 0 &&
|
|
red > 0)
|
|
{
|
|
trk.Pregap--;
|
|
red--;
|
|
}
|
|
}
|
|
|
|
trk.StartSector -= trk.Pregap;
|
|
|
|
#if DEBUG
|
|
dumpLog?.WriteLine($"Track {trk.Sequence} pregap is {trk.Pregap} sectors");
|
|
updateStatus?.Invoke($"Track {trk.Sequence} pregap is {trk.Pregap} sectors");
|
|
#endif
|
|
}
|
|
}
|
|
|
|
/// <summary>Reads a RAW subchannel sector for pregap calculation</summary>
|
|
/// <param name="dev">Device</param>
|
|
/// <param name="lba">LBA</param>
|
|
/// <param name="dbDev">Database entry for device</param>
|
|
/// <param name="subBuf">Read subchannel</param>
|
|
/// <param name="audioTrack">Set if it is an audio track</param>
|
|
/// <returns><c>true</c> if read correctly, <c>false</c> otherwise</returns>
|
|
static bool GetSectorForPregapRaw(Device dev, uint lba, Database.Models.Device dbDev, out byte[] subBuf,
|
|
bool audioTrack)
|
|
{
|
|
byte[] cmdBuf;
|
|
bool sense;
|
|
subBuf = null;
|
|
|
|
if(audioTrack)
|
|
{
|
|
sense = dev.ReadCd(out cmdBuf, out _, lba, 2448, 1, MmcSectorTypes.Cdda, false, false, false,
|
|
MmcHeaderCodes.None, true, false, MmcErrorField.None, MmcSubchannel.Raw, dev.Timeout,
|
|
out _);
|
|
|
|
if(sense)
|
|
sense = dev.ReadCd(out cmdBuf, out _, lba, 2448, 1, MmcSectorTypes.AllTypes, false, false, true,
|
|
MmcHeaderCodes.AllHeaders, true, true, MmcErrorField.None, MmcSubchannel.Raw,
|
|
dev.Timeout, out _);
|
|
}
|
|
else
|
|
{
|
|
sense = dev.ReadCd(out cmdBuf, out _, lba, 2448, 1, MmcSectorTypes.AllTypes, false, false, true,
|
|
MmcHeaderCodes.AllHeaders, true, true, MmcErrorField.None, MmcSubchannel.Raw,
|
|
dev.Timeout, out _);
|
|
|
|
if(sense)
|
|
sense = dev.ReadCd(out cmdBuf, out _, lba, 2448, 1, MmcSectorTypes.Cdda, false, false, false,
|
|
MmcHeaderCodes.None, true, false, MmcErrorField.None, MmcSubchannel.Raw, dev.Timeout,
|
|
out _);
|
|
}
|
|
|
|
if(!sense)
|
|
{
|
|
var tmpBuf = new byte[96];
|
|
Array.Copy(cmdBuf, 2352, tmpBuf, 0, 96);
|
|
subBuf = DeinterleaveQ(tmpBuf);
|
|
}
|
|
else
|
|
{
|
|
sense = dev.ReadCd(out cmdBuf, out _, lba, 96, 1, MmcSectorTypes.AllTypes, false, false, false,
|
|
MmcHeaderCodes.None, false, false, MmcErrorField.None, MmcSubchannel.Raw, dev.Timeout,
|
|
out _);
|
|
|
|
if(sense)
|
|
sense = dev.ReadCd(out cmdBuf, out _, lba, 96, 1, MmcSectorTypes.Cdda, false, false, false,
|
|
MmcHeaderCodes.None, false, false, MmcErrorField.None, MmcSubchannel.Raw,
|
|
dev.Timeout, out _);
|
|
|
|
if(!sense)
|
|
subBuf = DeinterleaveQ(cmdBuf);
|
|
else if(dbDev?.ATAPI?.RemovableMedias?.Any(d => d.SupportsPlextorReadCDDA == true) == true ||
|
|
dbDev?.SCSI?.RemovableMedias?.Any(d => d.SupportsPlextorReadCDDA == true) == true ||
|
|
dev.Manufacturer.ToLowerInvariant() == "plextor")
|
|
sense = dev.PlextorReadCdDa(out cmdBuf, out _, lba, 96, 1, PlextorSubchannel.All, dev.Timeout, out _);
|
|
|
|
{
|
|
if(!sense)
|
|
subBuf = DeinterleaveQ(cmdBuf);
|
|
}
|
|
}
|
|
|
|
return sense;
|
|
}
|
|
|
|
/// <summary>Reads a Q16 subchannel sector for pregap calculation</summary>
|
|
/// <param name="dev">Device</param>
|
|
/// <param name="lba">LBA</param>
|
|
/// <param name="subBuf">Read subchannel</param>
|
|
/// <param name="audioTrack">Set if it is an audio track</param>
|
|
/// <returns><c>true</c> if read correctly, <c>false</c> otherwise</returns>
|
|
static bool GetSectorForPregapQ16(Device dev, uint lba, out byte[] subBuf, bool audioTrack)
|
|
{
|
|
byte[] cmdBuf;
|
|
bool sense;
|
|
subBuf = null;
|
|
|
|
if(audioTrack)
|
|
{
|
|
sense = dev.ReadCd(out cmdBuf, out _, lba, 2368, 1, MmcSectorTypes.Cdda, false, false, false,
|
|
MmcHeaderCodes.None, true, false, MmcErrorField.None, MmcSubchannel.Q16, dev.Timeout,
|
|
out _);
|
|
|
|
if(sense)
|
|
sense = dev.ReadCd(out cmdBuf, out _, lba, 2368, 1, MmcSectorTypes.AllTypes, false, false, true,
|
|
MmcHeaderCodes.AllHeaders, true, true, MmcErrorField.None, MmcSubchannel.Q16,
|
|
dev.Timeout, out _);
|
|
}
|
|
else
|
|
{
|
|
sense = dev.ReadCd(out cmdBuf, out _, lba, 2368, 1, MmcSectorTypes.AllTypes, false, false, true,
|
|
MmcHeaderCodes.AllHeaders, true, true, MmcErrorField.None, MmcSubchannel.Q16,
|
|
dev.Timeout, out _);
|
|
|
|
if(sense)
|
|
sense = dev.ReadCd(out cmdBuf, out _, lba, 2368, 1, MmcSectorTypes.Cdda, false, false, false,
|
|
MmcHeaderCodes.None, true, false, MmcErrorField.None, MmcSubchannel.Q16, dev.Timeout,
|
|
out _);
|
|
}
|
|
|
|
if(!sense)
|
|
{
|
|
subBuf = new byte[16];
|
|
Array.Copy(cmdBuf, 2352, subBuf, 0, 16);
|
|
}
|
|
else
|
|
{
|
|
sense = dev.ReadCd(out cmdBuf, out _, lba, 16, 1, MmcSectorTypes.AllTypes, false, false, false,
|
|
MmcHeaderCodes.None, false, false, MmcErrorField.None, MmcSubchannel.Q16, dev.Timeout,
|
|
out _);
|
|
|
|
if(sense)
|
|
sense = dev.ReadCd(out cmdBuf, out _, lba, 16, 1, MmcSectorTypes.Cdda, false, false, false,
|
|
MmcHeaderCodes.None, false, false, MmcErrorField.None, MmcSubchannel.Q16,
|
|
dev.Timeout, out _);
|
|
|
|
if(!sense)
|
|
subBuf = cmdBuf;
|
|
}
|
|
|
|
return sense;
|
|
}
|
|
|
|
/// <summary>De-interleaves Q subchannel</summary>
|
|
/// <param name="subchannel">Interleaved subchannel</param>
|
|
/// <returns>De-interleaved Q subchannel</returns>
|
|
static byte[] DeinterleaveQ(byte[] subchannel)
|
|
{
|
|
var q = new int[subchannel.Length / 8];
|
|
|
|
// De-interlace Q subchannel
|
|
for(var iq = 0; iq < subchannel.Length; iq += 8)
|
|
{
|
|
q[iq / 8] = (subchannel[iq] & 0x40) << 1;
|
|
q[iq / 8] += subchannel[iq + 1] & 0x40;
|
|
q[iq / 8] += (subchannel[iq + 2] & 0x40) >> 1;
|
|
q[iq / 8] += (subchannel[iq + 3] & 0x40) >> 2;
|
|
q[iq / 8] += (subchannel[iq + 4] & 0x40) >> 3;
|
|
q[iq / 8] += (subchannel[iq + 5] & 0x40) >> 4;
|
|
q[iq / 8] += (subchannel[iq + 6] & 0x40) >> 5;
|
|
q[iq / 8] += (subchannel[iq + 7] & 0x40) >> 6;
|
|
}
|
|
|
|
var deQ = new byte[q.Length];
|
|
|
|
for(var iq = 0; iq < q.Length; iq++)
|
|
deQ[iq] = (byte)q[iq];
|
|
|
|
return deQ;
|
|
}
|
|
|
|
/// <summary>In place converts Q subchannel from binary to BCD numbering</summary>
|
|
/// <param name="q">Q subchannel</param>
|
|
static void BinaryToBcdQ(byte[] q)
|
|
{
|
|
q[1] = (byte)(((q[1] / 10) << 4) + q[1] % 10);
|
|
q[2] = (byte)(((q[2] / 10) << 4) + q[2] % 10);
|
|
q[3] = (byte)(((q[3] / 10) << 4) + q[3] % 10);
|
|
q[4] = (byte)(((q[4] / 10) << 4) + q[4] % 10);
|
|
q[5] = (byte)(((q[5] / 10) << 4) + q[5] % 10);
|
|
q[6] = (byte)(((q[6] / 10) << 4) + q[6] % 10);
|
|
q[7] = (byte)(((q[7] / 10) << 4) + q[7] % 10);
|
|
q[8] = (byte)(((q[8] / 10) << 4) + q[8] % 10);
|
|
q[9] = (byte)(((q[9] / 10) << 4) + q[9] % 10);
|
|
}
|
|
|
|
/// <summary>In place converts Q subchannel from BCD to binary numbering</summary>
|
|
/// <param name="q">Q subchannel</param>
|
|
static void BcdToBinaryQ(byte[] q)
|
|
{
|
|
q[1] = (byte)(q[1] / 16 * 10 + (q[1] & 0x0F));
|
|
q[2] = (byte)(q[2] / 16 * 10 + (q[2] & 0x0F));
|
|
q[3] = (byte)(q[3] / 16 * 10 + (q[3] & 0x0F));
|
|
q[4] = (byte)(q[4] / 16 * 10 + (q[4] & 0x0F));
|
|
q[5] = (byte)(q[5] / 16 * 10 + (q[5] & 0x0F));
|
|
q[6] = (byte)(q[6] / 16 * 10 + (q[6] & 0x0F));
|
|
q[7] = (byte)(q[7] / 16 * 10 + (q[7] & 0x0F));
|
|
q[8] = (byte)(q[8] / 16 * 10 + (q[8] & 0x0F));
|
|
q[9] = (byte)(q[9] / 16 * 10 + (q[9] & 0x0F));
|
|
}
|
|
} |