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https://github.com/aaru-dps/Aaru.git
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Separated CD offset calculation from dump.
This commit is contained in:
236
DiscImageChef.Core/Media/Info/CompactDisc.cs
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236
DiscImageChef.Core/Media/Info/CompactDisc.cs
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using System;
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using System.Linq;
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using DiscImageChef.CommonTypes;
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using DiscImageChef.CommonTypes.Enums;
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using DiscImageChef.CommonTypes.Structs;
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using DiscImageChef.Core.Logging;
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using DiscImageChef.Core.Media.Detection;
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using DiscImageChef.Database.Models;
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using DiscImageChef.Devices;
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using Device = DiscImageChef.Database.Models.Device;
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namespace DiscImageChef.Core.Media.Info
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{
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public static class CompactDisc
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{
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/// <summary>Gets the offset bytes from a Compact Disc</summary>
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/// <param name="cdOffset">Offset entry from database</param>
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/// <param name="dbDev">Device entry from database</param>
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/// <param name="debug">Debug</param>
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/// <param name="dev">Opened device</param>
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/// <param name="dskType">Detected disk type</param>
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/// <param name="dumpLog">Dump log if applicable</param>
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/// <param name="offsetBytes">Set to combined offset, in bytes</param>
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/// <param name="readcd">If device supports READ CD command</param>
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/// <param name="sectorsForOffset">Sectors needed to fix offset</param>
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/// <param name="tracks">Disc track list</param>
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/// <param name="updateStatus">UpdateStatus event</param>
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/// <returns><c>true</c> if offset could be found, <c>false</c> otherwise</returns>
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public static bool GetOffset(CdOffset cdOffset, Device dbDev, bool debug, DiscImageChef.Devices.Device dev,
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MediaType dskType, DumpLog dumpLog, out int offsetBytes, bool readcd,
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out int sectorsForOffset, Track[] tracks, UpdateStatusHandler updateStatus)
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{
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byte[] cmdBuf;
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bool sense;
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bool offsetFound = false;
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const uint sectorSize = 2352;
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offsetBytes = 0;
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sectorsForOffset = 0;
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if(dskType != MediaType.VideoNowColor)
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{
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if(tracks.All(t => t.TrackType != TrackType.Audio))
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{
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// No audio tracks so no need to fix offset
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dumpLog?.WriteLine("No audio tracks, disabling offset fix.");
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updateStatus?.Invoke("No audio tracks, disabling offset fix.");
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return false;
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}
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if(!readcd)
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{
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dumpLog.WriteLine("READ CD command is not supported, disabling offset fix. Dump may not be correct.");
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updateStatus?.
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Invoke("READ CD command is not supported, disabling offset fix. Dump may not be correct.");
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return false;
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}
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if(tracks.Any(t => t.TrackType != TrackType.Audio))
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{
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Track dataTrack = tracks.FirstOrDefault(t => t.TrackType != TrackType.Audio);
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if(dataTrack.TrackSequence != 0)
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{
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dataTrack.TrackStartSector += 151;
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// Calculate MSF
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ulong minute = dataTrack.TrackStartSector / 4500;
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ulong second = (dataTrack.TrackStartSector - (minute * 4500)) / 75;
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ulong frame = dataTrack.TrackStartSector - (minute * 4500) - (second * 75);
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dataTrack.TrackStartSector -= 151;
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// Convert to BCD
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ulong remainder = minute % 10;
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minute = ((minute / 10) * 16) + remainder;
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remainder = second % 10;
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second = ((second / 10) * 16) + remainder;
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remainder = frame % 10;
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frame = ((frame / 10) * 16) + remainder;
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// Scramble M and S
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minute ^= 0x01;
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second ^= 0x80;
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// Build sync
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byte[] sectorSync =
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{
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0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, (byte)minute,
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(byte)second, (byte)frame
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};
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byte[] tmpBuf = new byte[sectorSync.Length];
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// Plextor READ CDDA
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if(dbDev?.ATAPI?.RemovableMedias?.Any(d => d.SupportsPlextorReadCDDA == true) == true ||
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dbDev?.SCSI?.RemovableMedias?.Any(d => d.SupportsPlextorReadCDDA == true) == true ||
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dev.Manufacturer.ToLowerInvariant() == "plextor")
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{
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sense = dev.PlextorReadCdDa(out cmdBuf, out _, (uint)dataTrack.TrackStartSector, sectorSize,
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3, PlextorSubchannel.None, dev.Timeout, out _);
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if(!sense &&
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!dev.Error)
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{
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for(int i = 0; i < cmdBuf.Length - sectorSync.Length; i++)
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{
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Array.Copy(cmdBuf, i, tmpBuf, 0, sectorSync.Length);
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if(!tmpBuf.SequenceEqual(sectorSync))
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continue;
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offsetBytes = i - 2352;
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offsetFound = true;
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break;
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}
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}
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}
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if(debug ||
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dbDev?.ATAPI?.RemovableMedias?.Any(d => d.CanReadCdScrambled == true) == true ||
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dbDev?.SCSI?.RemovableMedias?.Any(d => d.CanReadCdScrambled == true) == true ||
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dev.Manufacturer.ToLowerInvariant() == "hl-dt-st")
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{
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sense = dev.ReadCd(out cmdBuf, out _, (uint)dataTrack.TrackStartSector, sectorSize, 3,
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MmcSectorTypes.Cdda, false, false, false, MmcHeaderCodes.None, true,
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false, MmcErrorField.None, MmcSubchannel.None, dev.Timeout, out _);
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if(!sense &&
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!dev.Error)
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{
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for(int i = 0; i < cmdBuf.Length - sectorSync.Length; i++)
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{
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Array.Copy(cmdBuf, i, tmpBuf, 0, sectorSync.Length);
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if(!tmpBuf.SequenceEqual(sectorSync))
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continue;
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offsetBytes = i - 2352;
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offsetFound = true;
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break;
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}
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}
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}
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}
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}
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if(cdOffset is null)
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{
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if(offsetFound)
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{
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dumpLog?.WriteLine($"Combined disc and drive offsets are {offsetBytes} bytes");
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updateStatus?.Invoke($"Combined disc and drive offsets are {offsetBytes} bytes");
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}
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else
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{
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dumpLog.
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WriteLine("Drive read offset is unknown, disabling offset fix. Dump may not be correct.");
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updateStatus?.
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Invoke("Drive read offset is unknown, disabling offset fix. Dump may not be correct.");
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return false;
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}
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}
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else
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{
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if(offsetFound)
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{
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dumpLog.
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WriteLine($"Disc offsets is {offsetBytes - (cdOffset.Offset * 4)} bytes ({(offsetBytes / 4) - cdOffset.Offset} samples)");
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updateStatus?.
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Invoke($"Disc offsets is {offsetBytes - (cdOffset.Offset * 4)} bytes ({(offsetBytes / 4) - cdOffset.Offset} samples)");
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}
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else
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{
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dumpLog?.WriteLine("Disc write offset is unknown, dump may not be correct.");
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updateStatus?.Invoke("Disc write offset is unknown, dump may not be correct.");
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offsetBytes = cdOffset.Offset * 4;
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}
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dumpLog?.WriteLine($"Offset is {offsetBytes} bytes.");
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updateStatus?.Invoke($"Offset is {offsetBytes} bytes.");
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}
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}
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else
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{
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byte[] videoNowColorFrame = new byte[9 * sectorSize];
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sense = dev.ReadCd(out cmdBuf, out _, 0, sectorSize, 9, MmcSectorTypes.AllTypes, false, false, true,
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MmcHeaderCodes.AllHeaders, true, true, MmcErrorField.None, MmcSubchannel.None,
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dev.Timeout, out _);
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if(sense || dev.Error)
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{
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sense = dev.ReadCd(out cmdBuf, out _, 0, sectorSize, 9, MmcSectorTypes.Cdda, false, false, true,
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MmcHeaderCodes.None, true, true, MmcErrorField.None, MmcSubchannel.None,
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dev.Timeout, out _);
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if(sense || dev.Error)
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{
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videoNowColorFrame = null;
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}
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}
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if(videoNowColorFrame is null)
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{
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dumpLog?.WriteLine("Could not find VideoNow Color frame offset, dump may not be correct.");
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updateStatus?.Invoke("Could not find VideoNow Color frame offset, dump may not be correct.");
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}
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else
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{
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offsetBytes = MMC.GetVideoNowColorOffset(videoNowColorFrame);
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dumpLog?.WriteLine($"VideoNow Color frame is offset {offsetBytes} bytes.");
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updateStatus?.Invoke($"VideoNow Color frame is offset {offsetBytes} bytes.");
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}
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}
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sectorsForOffset = offsetBytes / (int)sectorSize;
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if(sectorsForOffset < 0)
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sectorsForOffset *= -1;
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if(offsetBytes % sectorSize != 0)
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sectorsForOffset++;
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return offsetFound;
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}
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}
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}
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