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Aaru/Aaru.Images/DiscJuggler/Read.cs

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// /***************************************************************************
// Aaru Data Preservation Suite
// ----------------------------------------------------------------------------
//
// Filename : Read.cs
// Author(s) : Natalia Portillo <claunia@claunia.com>
//
// Component : Disk image plugins.
//
// --[ Description ] ----------------------------------------------------------
//
// Reads DiscJuggler disc images.
//
// --[ License ] --------------------------------------------------------------
//
// This library is free software; you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation; either version 2.1 of the
// License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, see <http://www.gnu.org/licenses/>.
//
// ----------------------------------------------------------------------------
// Copyright © 2011-2020 Natalia Portillo
// ****************************************************************************/
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using Aaru.CommonTypes;
using Aaru.CommonTypes.Enums;
using Aaru.CommonTypes.Exceptions;
using Aaru.CommonTypes.Interfaces;
using Aaru.CommonTypes.Structs;
using Aaru.Console;
using Aaru.Decoders.CD;
using Session = Aaru.CommonTypes.Structs.Session;
namespace Aaru.DiscImages
{
public partial class DiscJuggler
{
public bool Open(IFilter imageFilter)
{
imageStream = imageFilter.GetDataForkStream();
imageStream.Seek(-4, SeekOrigin.End);
byte[] dscLenB = new byte[4];
imageStream.Read(dscLenB, 0, 4);
int dscLen = BitConverter.ToInt32(dscLenB, 0);
if(dscLen >= imageStream.Length)
return false;
byte[] descriptor = new byte[dscLen];
imageStream.Seek(-dscLen, SeekOrigin.End);
imageStream.Read(descriptor, 0, dscLen);
// Sessions
if(descriptor[0] > 99 ||
descriptor[0] == 0)
return false;
int position = 1;
ushort sessionSequence = 0;
Sessions = new List<Session>();
Tracks = new List<Track>();
Partitions = new List<Partition>();
offsetmap = new Dictionary<uint, ulong>();
trackFlags = new Dictionary<uint, byte>();
ushort mediumType;
byte maxS = descriptor[0];
AaruConsole.DebugWriteLine("DiscJuggler plugin", "maxS = {0}", maxS);
uint lastSessionTrack = 0;
ulong currentOffset = 0;
// Read sessions
for(byte s = 0; s <= maxS; s++)
{
AaruConsole.DebugWriteLine("DiscJuggler plugin", "s = {0}", s);
// Seems all sessions start with this data
if(descriptor[position + 0] != 0x00 ||
descriptor[position + 2] != 0x00 ||
descriptor[position + 3] != 0x00 ||
descriptor[position + 4] != 0x00 ||
descriptor[position + 5] != 0x00 ||
descriptor[position + 6] != 0x00 ||
descriptor[position + 7] != 0x00 ||
descriptor[position + 8] != 0x00 ||
descriptor[position + 9] != 0x01 ||
descriptor[position + 10] != 0x00 ||
descriptor[position + 11] != 0x00 ||
descriptor[position + 12] != 0x00 ||
descriptor[position + 13] != 0xFF ||
descriptor[position + 14] != 0xFF)
return false;
// Too many tracks
if(descriptor[position + 1] > 99)
return false;
byte maxT = descriptor[position + 1];
AaruConsole.DebugWriteLine("DiscJuggler plugin", "maxT = {0}", maxT);
sessionSequence++;
var session = new Session
{
SessionSequence = sessionSequence, EndTrack = uint.MinValue, StartTrack = uint.MaxValue
};
position += 15;
bool addedATrack = false;
// Read track
for(byte t = 0; t < maxT; t++)
{
AaruConsole.DebugWriteLine("DiscJuggler plugin", "t = {0}", t);
var track = new Track();
// Skip unknown
position += 16;
byte[] trackFilenameB = new byte[descriptor[position]];
position++;
Array.Copy(descriptor, position, trackFilenameB, 0, trackFilenameB.Length);
position += trackFilenameB.Length;
track.TrackFile = Path.GetFileName(Encoding.Default.GetString(trackFilenameB));
AaruConsole.DebugWriteLine("DiscJuggler plugin", "\tfilename = {0}", track.TrackFile);
// Skip unknown
position += 29;
mediumType = BitConverter.ToUInt16(descriptor, position);
position += 2;
AaruConsole.DebugWriteLine("DiscJuggler plugin", "\tmediumType = {0}", mediumType);
// Read indices
ushort maxI = BitConverter.ToUInt16(descriptor, position);
position += 2;
AaruConsole.DebugWriteLine("DiscJuggler plugin", "\tmaxI = {0}", maxI);
// This is not really the index position, but, the index length, go figure
for(ushort i = 0; i < maxI; i++)
{
int index = BitConverter.ToInt32(descriptor, position);
track.Indexes.Add(i, index);
position += 4;
AaruConsole.DebugWriteLine("DiscJuggler plugin", "\tindex[{1}] = {0}", index, i);
}
// Read CD-Text
uint maxC = BitConverter.ToUInt32(descriptor, position);
position += 4;
AaruConsole.DebugWriteLine("DiscJuggler plugin", "\tmaxC = {0}", maxC);
for(uint c = 0; c < maxC; c++)
{
for(int cb = 0; cb < 18; cb++)
{
int bLen = descriptor[position];
position++;
AaruConsole.DebugWriteLine("DiscJuggler plugin", "\tc[{1}][{2}].Length = {0}", bLen, c, cb);
if(bLen <= 0)
continue;
byte[] textBlk = new byte[bLen];
Array.Copy(descriptor, position, textBlk, 0, bLen);
position += bLen;
// Track title
if(cb != 10)
continue;
track.TrackDescription = Encoding.Default.GetString(textBlk, 0, bLen);
AaruConsole.DebugWriteLine("DiscJuggler plugin", "\tTrack title = {0}",
track.TrackDescription);
}
}
position += 2;
uint trackMode = BitConverter.ToUInt32(descriptor, position);
AaruConsole.DebugWriteLine("DiscJuggler plugin", "\ttrackMode = {0}", trackMode);
position += 4;
// Skip unknown
position += 4;
session.SessionSequence = (ushort)(BitConverter.ToUInt32(descriptor, position) + 1);
track.TrackSession = session.SessionSequence;
AaruConsole.DebugWriteLine("DiscJuggler plugin", "\tsession = {0}", session.SessionSequence);
position += 4;
track.TrackSequence = BitConverter.ToUInt32(descriptor, position) + lastSessionTrack + 1;
AaruConsole.DebugWriteLine("DiscJuggler plugin", "\ttrack = {1} + {2} + 1 = {0}",
track.TrackSequence, BitConverter.ToUInt32(descriptor, position),
lastSessionTrack);
// There's always an index 0 in the image
track.TrackPregap = (ulong)track.Indexes[0];
if(track.TrackSequence == 1)
track.Indexes[0] = -150;
if(track.Indexes[0] == 0)
track.Indexes.Remove(0);
position += 4;
track.TrackStartSector = BitConverter.ToUInt32(descriptor, position);
AaruConsole.DebugWriteLine("DiscJuggler plugin", "\ttrackStart = {0}", track.TrackStartSector);
position += 4;
uint trackLen = BitConverter.ToUInt32(descriptor, position);
// DiscJuggler counts the first track pregap start as 0 instead of -150, we need to adjust appropriately
if(track.TrackStartSector == 0)
trackLen -= 150;
else
track.TrackStartSector -= 150;
int leftLen = (int)trackLen;
// Convert index length to index position
foreach(KeyValuePair<ushort, int> idx in track.Indexes.Reverse())
{
leftLen -= idx.Value;
if(idx.Key == 0 &&
track.TrackSequence == 1)
continue;
track.Indexes[idx.Key] = (int)track.TrackStartSector + leftLen;
}
track.TrackEndSector = (track.TrackStartSector + trackLen) - 1;
AaruConsole.DebugWriteLine("DiscJuggler plugin", "\ttrackEnd = {0}", track.TrackEndSector);
position += 4;
if(track.TrackSequence > session.EndTrack)
{
session.EndTrack = track.TrackSequence;
session.EndSector = track.TrackEndSector;
}
if(track.TrackSequence < session.StartTrack)
{
session.StartTrack = track.TrackSequence;
session.StartSector = track.TrackStartSector;
}
// Skip unknown
position += 16;
uint readMode = BitConverter.ToUInt32(descriptor, position);
AaruConsole.DebugWriteLine("DiscJuggler plugin", "\treadMode = {0}", readMode);
position += 4;
uint trackCtl = BitConverter.ToUInt32(descriptor, position);
AaruConsole.DebugWriteLine("DiscJuggler plugin", "\ttrackCtl = {0}", trackCtl);
position += 4;
// Skip unknown
position += 9;
byte[] isrc = new byte[12];
Array.Copy(descriptor, position, isrc, 0, 12);
AaruConsole.DebugWriteLine("DiscJuggler plugin", "\tisrc = {0}", StringHandlers.CToString(isrc));
position += 12;
uint isrcValid = BitConverter.ToUInt32(descriptor, position);
AaruConsole.DebugWriteLine("DiscJuggler plugin", "\tisrc_valid = {0}", isrcValid);
position += 4;
// Skip unknown
position += 87;
byte sessionType = descriptor[position];
AaruConsole.DebugWriteLine("DiscJuggler plugin", "\tsessionType = {0}", sessionType);
position++;
// Skip unknown
position += 5;
byte trackFollows = descriptor[position];
AaruConsole.DebugWriteLine("DiscJuggler plugin", "\ttrackFollows = {0}", trackFollows);
position += 2;
uint endAddress = BitConverter.ToUInt32(descriptor, position);
AaruConsole.DebugWriteLine("DiscJuggler plugin", "\tendAddress = {0}", endAddress);
position += 4;
// As to skip the lead-in
bool firstTrack = currentOffset == 0;
track.TrackSubchannelType = TrackSubchannelType.None;
switch(trackMode)
{
// Audio
case 0:
if(imageInfo.SectorSize < 2352)
imageInfo.SectorSize = 2352;
track.TrackType = TrackType.Audio;
track.TrackBytesPerSector = 2352;
track.TrackRawBytesPerSector = 2352;
switch(readMode)
{
case 2:
if(firstTrack)
currentOffset += 150 * (ulong)track.TrackRawBytesPerSector;
track.TrackFileOffset = currentOffset;
currentOffset += trackLen * (ulong)track.TrackRawBytesPerSector;
break;
case 3:
if(firstTrack)
currentOffset += 150 * (ulong)(track.TrackRawBytesPerSector + 16);
track.TrackFileOffset = currentOffset;
track.TrackSubchannelFile = track.TrackFile;
track.TrackSubchannelOffset = currentOffset;
track.TrackSubchannelType = TrackSubchannelType.Q16Interleaved;
currentOffset += trackLen * (ulong)(track.TrackRawBytesPerSector + 16);
break;
case 4:
if(firstTrack)
currentOffset += 150 * (ulong)(track.TrackRawBytesPerSector + 96);
track.TrackFileOffset = currentOffset;
track.TrackSubchannelFile = track.TrackFile;
track.TrackSubchannelOffset = currentOffset;
track.TrackSubchannelType = TrackSubchannelType.RawInterleaved;
currentOffset += trackLen * (ulong)(track.TrackRawBytesPerSector + 96);
break;
default: throw new ImageNotSupportedException($"Unknown read mode {readMode}");
}
break;
// Mode 1 or DVD
case 1:
if(imageInfo.SectorSize < 2048)
imageInfo.SectorSize = 2048;
track.TrackType = TrackType.CdMode1;
track.TrackBytesPerSector = 2048;
switch(readMode)
{
case 0:
track.TrackRawBytesPerSector = 2048;
if(firstTrack)
currentOffset += 150 * (ulong)track.TrackRawBytesPerSector;
track.TrackFileOffset = currentOffset;
currentOffset += trackLen * (ulong)track.TrackRawBytesPerSector;
break;
case 1:
throw
new ImageNotSupportedException($"Invalid read mode {readMode} for this track");
case 2:
track.TrackRawBytesPerSector = 2352;
currentOffset += trackLen * (ulong)track.TrackRawBytesPerSector;
if(!imageInfo.ReadableSectorTags.Contains(SectorTagType.CdSectorSync))
imageInfo.ReadableSectorTags.Add(SectorTagType.CdSectorSync);
if(!imageInfo.ReadableSectorTags.Contains(SectorTagType.CdSectorHeader))
imageInfo.ReadableSectorTags.Add(SectorTagType.CdSectorHeader);
if(!imageInfo.ReadableSectorTags.Contains(SectorTagType.CdSectorEcc))
imageInfo.ReadableSectorTags.Add(SectorTagType.CdSectorEcc);
if(!imageInfo.ReadableSectorTags.Contains(SectorTagType.CdSectorEccP))
imageInfo.ReadableSectorTags.Add(SectorTagType.CdSectorEccP);
if(!imageInfo.ReadableSectorTags.Contains(SectorTagType.CdSectorEccQ))
imageInfo.ReadableSectorTags.Add(SectorTagType.CdSectorEccQ);
if(!imageInfo.ReadableSectorTags.Contains(SectorTagType.CdSectorEdc))
imageInfo.ReadableSectorTags.Add(SectorTagType.CdSectorEdc);
break;
case 3:
track.TrackRawBytesPerSector = 2352;
if(firstTrack)
currentOffset += 150 * (ulong)(track.TrackRawBytesPerSector + 16);
track.TrackFileOffset = currentOffset;
track.TrackSubchannelFile = track.TrackFile;
track.TrackSubchannelOffset = currentOffset;
track.TrackSubchannelType = TrackSubchannelType.Q16Interleaved;
currentOffset += trackLen * (ulong)(track.TrackRawBytesPerSector + 16);
if(!imageInfo.ReadableSectorTags.Contains(SectorTagType.CdSectorSync))
imageInfo.ReadableSectorTags.Add(SectorTagType.CdSectorSync);
if(!imageInfo.ReadableSectorTags.Contains(SectorTagType.CdSectorHeader))
imageInfo.ReadableSectorTags.Add(SectorTagType.CdSectorHeader);
if(!imageInfo.ReadableSectorTags.Contains(SectorTagType.CdSectorEcc))
imageInfo.ReadableSectorTags.Add(SectorTagType.CdSectorEcc);
if(!imageInfo.ReadableSectorTags.Contains(SectorTagType.CdSectorEccP))
imageInfo.ReadableSectorTags.Add(SectorTagType.CdSectorEccP);
if(!imageInfo.ReadableSectorTags.Contains(SectorTagType.CdSectorEccQ))
imageInfo.ReadableSectorTags.Add(SectorTagType.CdSectorEccQ);
if(!imageInfo.ReadableSectorTags.Contains(SectorTagType.CdSectorEdc))
imageInfo.ReadableSectorTags.Add(SectorTagType.CdSectorEdc);
break;
case 4:
track.TrackRawBytesPerSector = 2352;
if(firstTrack)
currentOffset += 150 * (ulong)(track.TrackRawBytesPerSector + 96);
track.TrackFileOffset = currentOffset;
track.TrackSubchannelFile = track.TrackFile;
track.TrackSubchannelOffset = currentOffset;
track.TrackSubchannelType = TrackSubchannelType.RawInterleaved;
currentOffset += trackLen * (ulong)(track.TrackRawBytesPerSector + 96);
if(!imageInfo.ReadableSectorTags.Contains(SectorTagType.CdSectorSync))
imageInfo.ReadableSectorTags.Add(SectorTagType.CdSectorSync);
if(!imageInfo.ReadableSectorTags.Contains(SectorTagType.CdSectorHeader))
imageInfo.ReadableSectorTags.Add(SectorTagType.CdSectorHeader);
if(!imageInfo.ReadableSectorTags.Contains(SectorTagType.CdSectorEcc))
imageInfo.ReadableSectorTags.Add(SectorTagType.CdSectorEcc);
if(!imageInfo.ReadableSectorTags.Contains(SectorTagType.CdSectorEccP))
imageInfo.ReadableSectorTags.Add(SectorTagType.CdSectorEccP);
if(!imageInfo.ReadableSectorTags.Contains(SectorTagType.CdSectorEccQ))
imageInfo.ReadableSectorTags.Add(SectorTagType.CdSectorEccQ);
if(!imageInfo.ReadableSectorTags.Contains(SectorTagType.CdSectorEdc))
imageInfo.ReadableSectorTags.Add(SectorTagType.CdSectorEdc);
break;
default: throw new ImageNotSupportedException($"Unknown read mode {readMode}");
}
break;
// Mode 2
case 2:
if(imageInfo.SectorSize < 2336)
imageInfo.SectorSize = 2336;
track.TrackType = TrackType.CdMode2Formless;
track.TrackBytesPerSector = 2336;
switch(readMode)
{
case 0:
throw
new ImageNotSupportedException($"Invalid read mode {readMode} for this track");
case 1:
track.TrackRawBytesPerSector = 2336;
if(firstTrack)
currentOffset += 150 * (ulong)track.TrackRawBytesPerSector;
track.TrackFileOffset = currentOffset;
currentOffset += trackLen * (ulong)track.TrackRawBytesPerSector;
break;
case 2:
track.TrackRawBytesPerSector = 2352;
currentOffset += trackLen * (ulong)track.TrackRawBytesPerSector;
if(!imageInfo.ReadableSectorTags.Contains(SectorTagType.CdSectorSync))
imageInfo.ReadableSectorTags.Add(SectorTagType.CdSectorSync);
if(!imageInfo.ReadableSectorTags.Contains(SectorTagType.CdSectorHeader))
imageInfo.ReadableSectorTags.Add(SectorTagType.CdSectorHeader);
break;
case 3:
track.TrackRawBytesPerSector = 2352;
if(firstTrack)
currentOffset += 150 * (ulong)(track.TrackRawBytesPerSector + 16);
track.TrackFileOffset = currentOffset;
track.TrackSubchannelFile = track.TrackFile;
track.TrackSubchannelOffset = currentOffset;
track.TrackSubchannelType = TrackSubchannelType.Q16Interleaved;
currentOffset += trackLen * (ulong)(track.TrackRawBytesPerSector + 16);
if(!imageInfo.ReadableSectorTags.Contains(SectorTagType.CdSectorSync))
imageInfo.ReadableSectorTags.Add(SectorTagType.CdSectorSync);
if(!imageInfo.ReadableSectorTags.Contains(SectorTagType.CdSectorHeader))
imageInfo.ReadableSectorTags.Add(SectorTagType.CdSectorHeader);
break;
case 4:
track.TrackRawBytesPerSector = 2352;
if(firstTrack)
currentOffset += 150 * (ulong)(track.TrackRawBytesPerSector + 96);
track.TrackFileOffset = currentOffset;
track.TrackSubchannelFile = track.TrackFile;
track.TrackSubchannelOffset = currentOffset;
track.TrackSubchannelType = TrackSubchannelType.RawInterleaved;
currentOffset += trackLen * (ulong)(track.TrackRawBytesPerSector + 96);
if(!imageInfo.ReadableSectorTags.Contains(SectorTagType.CdSectorSync))
imageInfo.ReadableSectorTags.Add(SectorTagType.CdSectorSync);
if(!imageInfo.ReadableSectorTags.Contains(SectorTagType.CdSectorHeader))
imageInfo.ReadableSectorTags.Add(SectorTagType.CdSectorHeader);
break;
default: throw new ImageNotSupportedException($"Unknown read mode {readMode}");
}
break;
default: throw new ImageNotSupportedException($"Unknown track mode {trackMode}");
}
track.TrackFile = imageFilter.GetFilename();
track.TrackFilter = imageFilter;
if(track.TrackSubchannelType != TrackSubchannelType.None)
{
track.TrackSubchannelFile = imageFilter.GetFilename();
track.TrackSubchannelFilter = imageFilter;
if(!imageInfo.ReadableSectorTags.Contains(SectorTagType.CdSectorSubchannel))
imageInfo.ReadableSectorTags.Add(SectorTagType.CdSectorSubchannel);
}
var partition = new Partition
{
Description = track.TrackDescription, Length = trackLen, Sequence = track.TrackSequence,
Offset = track.TrackFileOffset, Start = track.TrackStartSector,
Type = track.TrackType.ToString()
};
if(track.TrackSequence > 1 &&
track.TrackPregap > 0)
{
partition.Start += track.TrackPregap;
partition.Length -= track.TrackPregap;
}
partition.Size = partition.Length * (ulong)track.TrackBytesPerSector;
imageInfo.Sectors += partition.Length;
Partitions.Add(partition);
offsetmap.Add(track.TrackSequence, track.TrackStartSector);
Tracks.Add(track);
trackFlags.Add(track.TrackSequence, (byte)(trackCtl & 0xFF));
addedATrack = true;
}
if(!addedATrack)
continue;
lastSessionTrack = session.EndTrack;
Sessions.Add(session);
AaruConsole.DebugWriteLine("DiscJuggler plugin", "session.StartTrack = {0}", session.StartTrack);
AaruConsole.DebugWriteLine("DiscJuggler plugin", "session.StartSector = {0}", session.StartSector);
AaruConsole.DebugWriteLine("DiscJuggler plugin", "session.EndTrack = {0}", session.EndTrack);
AaruConsole.DebugWriteLine("DiscJuggler plugin", "session.EndSector = {0}", session.EndSector);
AaruConsole.DebugWriteLine("DiscJuggler plugin", "session.SessionSequence = {0}",
session.SessionSequence);
}
// Skip unknown
position += 16;
AaruConsole.DebugWriteLine("DiscJuggler plugin", "Current position = {0}", position);
byte[] filenameB = new byte[descriptor[position]];
position++;
Array.Copy(descriptor, position, filenameB, 0, filenameB.Length);
position += filenameB.Length;
string filename = Path.GetFileName(Encoding.Default.GetString(filenameB));
AaruConsole.DebugWriteLine("DiscJuggler plugin", "filename = {0}", filename);
// Skip unknown
position += 29;
mediumType = BitConverter.ToUInt16(descriptor, position);
position += 2;
AaruConsole.DebugWriteLine("DiscJuggler plugin", "mediumType = {0}", mediumType);
uint discSize = BitConverter.ToUInt32(descriptor, position);
position += 4;
AaruConsole.DebugWriteLine("DiscJuggler plugin", "discSize = {0}", discSize);
byte[] volidB = new byte[descriptor[position]];
position++;
Array.Copy(descriptor, position, volidB, 0, volidB.Length);
position += volidB.Length;
string volid = Path.GetFileName(Encoding.Default.GetString(volidB));
AaruConsole.DebugWriteLine("DiscJuggler plugin", "volid = {0}", volid);
// Skip unknown
position += 9;
byte[] mcn = new byte[13];
Array.Copy(descriptor, position, mcn, 0, 13);
AaruConsole.DebugWriteLine("DiscJuggler plugin", "mcn = {0}", StringHandlers.CToString(mcn));
position += 13;
uint mcnValid = BitConverter.ToUInt32(descriptor, position);
AaruConsole.DebugWriteLine("DiscJuggler plugin", "mcn_valid = {0}", mcnValid);
position += 4;
uint cdtextLen = BitConverter.ToUInt32(descriptor, position);
AaruConsole.DebugWriteLine("DiscJuggler plugin", "cdtextLen = {0}", cdtextLen);
position += 4;
if(cdtextLen > 0)
{
cdtext = new byte[cdtextLen];
Array.Copy(descriptor, position, cdtext, 0, cdtextLen);
position += (int)cdtextLen;
imageInfo.ReadableMediaTags.Add(MediaTagType.CD_TEXT);
}
// Skip unknown
position += 12;
AaruConsole.DebugWriteLine("DiscJuggler plugin", "End position = {0}", position);
imageInfo.MediaType = DecodeCdiMediumType(mediumType);
if(imageInfo.MediaType == MediaType.CDROM)
{
bool data = false;
bool mode2 = false;
bool firstaudio = false;
bool firstdata = false;
bool audio = false;
for(int i = 0; i < Tracks.Count; i++)
{
// First track is audio
firstaudio |= i == 0 && Tracks[i].TrackType == TrackType.Audio;
// First track is data
firstdata |= i == 0 && Tracks[i].TrackType != TrackType.Audio;
// Any non first track is data
data |= i != 0 && Tracks[i].TrackType != TrackType.Audio;
// Any non first track is audio
audio |= i != 0 && Tracks[i].TrackType == TrackType.Audio;
switch(Tracks[i].TrackType)
{
case TrackType.CdMode2Form1:
case TrackType.CdMode2Form2:
case TrackType.CdMode2Formless:
mode2 = true;
break;
}
}
if(!data &&
!firstdata)
imageInfo.MediaType = MediaType.CDDA;
else if(firstaudio &&
data &&
Sessions.Count > 1 &&
mode2)
imageInfo.MediaType = MediaType.CDPLUS;
else if((firstdata && audio) || mode2)
imageInfo.MediaType = MediaType.CDROMXA;
else if(!audio)
imageInfo.MediaType = MediaType.CDROM;
else
imageInfo.MediaType = MediaType.CD;
}
imageInfo.Application = "DiscJuggler";
imageInfo.ImageSize = (ulong)imageFilter.GetDataForkLength();
imageInfo.CreationTime = imageFilter.GetCreationTime();
imageInfo.LastModificationTime = imageFilter.GetLastWriteTime();
imageInfo.XmlMediaType = XmlMediaType.OpticalDisc;
_sectorBuilder = new SectorBuilder();
if(mediumType != 152)
foreach(Track track in Tracks)
{
track.TrackPregap = 0;
track.Indexes?.Clear();
}
return true;
}
public byte[] ReadDiskTag(MediaTagType tag)
{
switch(tag)
{
case MediaTagType.CD_TEXT:
{
if(cdtext != null &&
cdtext.Length > 0)
return cdtext;
throw new FeatureNotPresentImageException("Image does not contain CD-TEXT information.");
}
default:
throw new FeatureSupportedButNotImplementedImageException("Feature not supported by image format");
}
}
public byte[] ReadSector(ulong sectorAddress) => ReadSectors(sectorAddress, 1);
public byte[] ReadSectorTag(ulong sectorAddress, SectorTagType tag) => ReadSectorsTag(sectorAddress, 1, tag);
public byte[] ReadSector(ulong sectorAddress, uint track) => ReadSectors(sectorAddress, 1, track);
public byte[] ReadSectorTag(ulong sectorAddress, uint track, SectorTagType tag) =>
ReadSectorsTag(sectorAddress, 1, track, tag);
public byte[] ReadSectors(ulong sectorAddress, uint length)
{
foreach(KeyValuePair<uint, ulong> kvp in from kvp in offsetmap where sectorAddress >= kvp.Value
from track in Tracks where track.TrackSequence == kvp.Key
where sectorAddress < track.TrackEndSector select kvp)
return ReadSectors(sectorAddress - kvp.Value, length, kvp.Key);
throw new ArgumentOutOfRangeException(nameof(sectorAddress), $"Sector address {sectorAddress} not found");
}
public byte[] ReadSectorsTag(ulong sectorAddress, uint length, SectorTagType tag)
{
foreach(KeyValuePair<uint, ulong> kvp in offsetmap.
Where(kvp => sectorAddress >= kvp.Value).
Where(kvp => Tracks.
Where(track => track.TrackSequence == kvp.Key).
Any(track => sectorAddress < track.TrackEndSector)))
return ReadSectorsTag(sectorAddress - kvp.Value, length, kvp.Key, tag);
throw new ArgumentOutOfRangeException(nameof(sectorAddress), $"Sector address {sectorAddress} not found");
}
public byte[] ReadSectors(ulong sectorAddress, uint length, uint track)
{
var aaruTrack = new Track
{
TrackSequence = 0
};
foreach(Track linqTrack in Tracks.Where(linqTrack => linqTrack.TrackSequence == track))
{
aaruTrack = linqTrack;
break;
}
if(aaruTrack is null)
throw new ArgumentOutOfRangeException(nameof(track), "Track does not exist in disc image");
if(length + sectorAddress > aaruTrack.TrackEndSector)
throw new ArgumentOutOfRangeException(nameof(length),
$"Requested more sectors ({length + sectorAddress}) than present in track ({aaruTrack.TrackEndSector}), won't cross tracks");
uint sectorOffset;
uint sectorSize;
uint sectorSkip;
bool mode2 = false;
switch(aaruTrack.TrackType)
{
case TrackType.Audio:
{
sectorOffset = 0;
sectorSize = 2352;
sectorSkip = 0;
break;
}
case TrackType.CdMode1:
if(aaruTrack.TrackRawBytesPerSector == 2352)
{
sectorOffset = 16;
sectorSize = 2048;
sectorSkip = 288;
}
else
{
sectorOffset = 0;
sectorSize = 2048;
sectorSkip = 0;
}
break;
case TrackType.CdMode2Formless:
{
mode2 = true;
sectorOffset = 0;
sectorSize = (uint)aaruTrack.TrackRawBytesPerSector;
sectorSkip = 0;
}
break;
default: throw new FeatureSupportedButNotImplementedImageException("Unsupported track type");
}
switch(aaruTrack.TrackSubchannelType)
{
case TrackSubchannelType.None:
sectorSkip += 0;
break;
case TrackSubchannelType.Q16Interleaved:
sectorSkip += 16;
break;
case TrackSubchannelType.PackedInterleaved:
sectorSkip += 96;
break;
default: throw new FeatureSupportedButNotImplementedImageException("Unsupported subchannel type");
}
byte[] buffer = new byte[sectorSize * length];
imageStream.
Seek((long)(aaruTrack.TrackFileOffset + (sectorAddress * (ulong)aaruTrack.TrackRawBytesPerSector)),
SeekOrigin.Begin);
if(mode2)
{
var mode2Ms = new MemoryStream((int)((sectorSize + sectorSkip) * length));
imageStream.Read(buffer, 0, buffer.Length);
for(int i = 0; i < length; i++)
{
byte[] sector = new byte[sectorSize];
Array.Copy(buffer, (sectorSize + sectorSkip) * i, sector, 0, sectorSize);
sector = Sector.GetUserDataFromMode2(sector);
mode2Ms.Write(sector, 0, sector.Length);
}
buffer = mode2Ms.ToArray();
}
else if(sectorOffset == 0 &&
sectorSkip == 0)
imageStream.Read(buffer, 0, buffer.Length);
else
for(int i = 0; i < length; i++)
{
byte[] sector = new byte[sectorSize];
imageStream.Seek(sectorOffset, SeekOrigin.Current);
imageStream.Read(sector, 0, sector.Length);
imageStream.Seek(sectorSkip, SeekOrigin.Current);
Array.Copy(sector, 0, buffer, i * sectorSize, sectorSize);
}
return buffer;
}
public byte[] ReadSectorsTag(ulong sectorAddress, uint length, uint track, SectorTagType tag)
{
if(tag == SectorTagType.CdTrackFlags)
track = (uint)sectorAddress;
var aaruTrack = new Track
{
TrackSequence = 0
};
foreach(Track linqTrack in Tracks.Where(linqTrack => linqTrack.TrackSequence == track))
{
aaruTrack = linqTrack;
break;
}
if(aaruTrack is null)
throw new ArgumentOutOfRangeException(nameof(track), "Track does not exist in disc image");
if(length + sectorAddress > aaruTrack.TrackEndSector)
throw new ArgumentOutOfRangeException(nameof(length),
$"Requested more sectors ({length + sectorAddress}) than present in track ({aaruTrack.TrackEndSector}), won't cross tracks");
if(aaruTrack.TrackType == TrackType.Data)
throw new ArgumentException("Unsupported tag requested", nameof(tag));
switch(tag)
{
case SectorTagType.CdSectorEcc:
case SectorTagType.CdSectorEccP:
case SectorTagType.CdSectorEccQ:
case SectorTagType.CdSectorEdc:
case SectorTagType.CdSectorHeader:
case SectorTagType.CdSectorSubchannel:
case SectorTagType.CdSectorSubHeader:
case SectorTagType.CdSectorSync: break;
case SectorTagType.CdTrackFlags:
if(trackFlags.TryGetValue(track, out byte flag))
return new[]
{
flag
};
throw new ArgumentException("Unsupported tag requested", nameof(tag));
default: throw new ArgumentException("Unsupported tag requested", nameof(tag));
}
uint sectorOffset;
uint sectorSize;
uint sectorSkip;
switch(aaruTrack.TrackType)
{
case TrackType.CdMode1:
if(aaruTrack.TrackRawBytesPerSector != 2352)
throw new ArgumentException("Unsupported tag requested for this track", nameof(tag));
switch(tag)
{
case SectorTagType.CdSectorSync:
{
sectorOffset = 0;
sectorSize = 12;
sectorSkip = 2340;
break;
}
case SectorTagType.CdSectorHeader:
{
sectorOffset = 12;
sectorSize = 4;
sectorSkip = 2336;
break;
}
case SectorTagType.CdSectorSubHeader:
throw new ArgumentException("Unsupported tag requested for this track", nameof(tag));
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;
}
case SectorTagType.CdSectorSubchannel:
switch(aaruTrack.TrackSubchannelType)
{
case TrackSubchannelType.None:
throw new ArgumentException("Unsupported tag requested for this track",
nameof(tag));
case TrackSubchannelType.Q16Interleaved:
sectorSize = 16;
break;
default:
sectorSize = 96;
break;
}
sectorOffset = 2352;
sectorSkip = 0;
break;
default: throw new ArgumentException("Unsupported tag requested", nameof(tag));
}
break;
case TrackType.CdMode2Formless:
if(aaruTrack.TrackRawBytesPerSector != 2352)
throw new ArgumentException("Unsupported tag requested for this track", nameof(tag));
{
switch(tag)
{
case SectorTagType.CdSectorSync:
case SectorTagType.CdSectorHeader:
case SectorTagType.CdSectorEcc:
case SectorTagType.CdSectorEccP:
case SectorTagType.CdSectorEccQ:
throw new ArgumentException("Unsupported tag requested for this track", nameof(tag));
case SectorTagType.CdSectorSubHeader:
{
sectorOffset = 0;
sectorSize = 8;
sectorSkip = 2328;
break;
}
case SectorTagType.CdSectorEdc:
{
sectorOffset = 2332;
sectorSize = 4;
sectorSkip = 0;
break;
}
case SectorTagType.CdSectorSubchannel:
switch(aaruTrack.TrackSubchannelType)
{
case TrackSubchannelType.None:
throw new ArgumentException("Unsupported tag requested for this track",
nameof(tag));
case TrackSubchannelType.Q16Interleaved:
sectorSize = 16;
break;
default:
sectorSize = 96;
break;
}
sectorOffset = 2352;
sectorSkip = 0;
break;
default: throw new ArgumentException("Unsupported tag requested", nameof(tag));
}
break;
}
case TrackType.Audio:
{
switch(tag)
{
case SectorTagType.CdSectorSubchannel:
switch(aaruTrack.TrackSubchannelType)
{
case TrackSubchannelType.None:
throw new ArgumentException("Unsupported tag requested for this track",
nameof(tag));
case TrackSubchannelType.Q16Interleaved:
sectorSize = 16;
break;
default:
sectorSize = 96;
break;
}
sectorOffset = 2352;
sectorSkip = 0;
break;
default: throw new ArgumentException("Unsupported tag requested", nameof(tag));
}
break;
}
default: throw new FeatureSupportedButNotImplementedImageException("Unsupported track type");
}
switch(aaruTrack.TrackSubchannelType)
{
case TrackSubchannelType.None:
sectorSkip += 0;
break;
case TrackSubchannelType.Q16Interleaved:
sectorSkip += 16;
break;
case TrackSubchannelType.PackedInterleaved:
sectorSkip += 96;
break;
default: throw new FeatureSupportedButNotImplementedImageException("Unsupported subchannel type");
}
byte[] buffer = new byte[sectorSize * length];
imageStream.
Seek((long)(aaruTrack.TrackFileOffset + (sectorAddress * (ulong)aaruTrack.TrackRawBytesPerSector)),
SeekOrigin.Begin);
if(sectorOffset == 0 &&
sectorSkip == 0)
imageStream.Read(buffer, 0, buffer.Length);
else
for(int i = 0; i < length; i++)
{
byte[] sector = new byte[sectorSize];
imageStream.Seek(sectorOffset, SeekOrigin.Current);
imageStream.Read(sector, 0, sector.Length);
imageStream.Seek(sectorSkip, SeekOrigin.Current);
Array.Copy(sector, 0, buffer, i * sectorSize, sectorSize);
}
if(aaruTrack.TrackSubchannelType == TrackSubchannelType.Q16Interleaved &&
tag == SectorTagType.CdSectorSubchannel)
return Subchannel.ConvertQToRaw(buffer);
return buffer;
}
public byte[] ReadSectorLong(ulong sectorAddress) => ReadSectorsLong(sectorAddress, 1);
public byte[] ReadSectorLong(ulong sectorAddress, uint track) => ReadSectorsLong(sectorAddress, 1, track);
public byte[] ReadSectorsLong(ulong sectorAddress, uint length)
{
foreach(KeyValuePair<uint, ulong> kvp in from kvp in offsetmap where sectorAddress >= kvp.Value
from track in Tracks where track.TrackSequence == kvp.Key
where sectorAddress - kvp.Value <
track.TrackEndSector - track.TrackStartSector select kvp)
return ReadSectorsLong(sectorAddress - kvp.Value, length, kvp.Key);
throw new ArgumentOutOfRangeException(nameof(sectorAddress), $"Sector address {sectorAddress} not found");
}
public byte[] ReadSectorsLong(ulong sectorAddress, uint length, uint track)
{
var aaruTrack = new Track
{
TrackSequence = 0
};
foreach(Track linqTrack in Tracks.Where(linqTrack => linqTrack.TrackSequence == track))
{
aaruTrack = linqTrack;
break;
}
if(aaruTrack is null)
throw new ArgumentOutOfRangeException(nameof(track), "Track does not exist in disc image");
if(length + sectorAddress > aaruTrack.TrackEndSector)
throw new ArgumentOutOfRangeException(nameof(length),
$"Requested more sectors ({length + sectorAddress}) than present in track ({aaruTrack.TrackEndSector}), won't cross tracks");
uint sectorSize = (uint)aaruTrack.TrackRawBytesPerSector;
uint sectorSkip = 0;
switch(aaruTrack.TrackSubchannelType)
{
case TrackSubchannelType.None:
sectorSkip += 0;
break;
case TrackSubchannelType.Q16Interleaved:
sectorSkip += 16;
break;
case TrackSubchannelType.PackedInterleaved:
sectorSkip += 96;
break;
default: throw new FeatureSupportedButNotImplementedImageException("Unsupported subchannel type");
}
byte[] buffer = new byte[sectorSize * length];
imageStream.
Seek((long)(aaruTrack.TrackFileOffset + (sectorAddress * (ulong)aaruTrack.TrackRawBytesPerSector)),
SeekOrigin.Begin);
if(sectorSkip == 0)
imageStream.Read(buffer, 0, buffer.Length);
else
for(int i = 0; i < length; i++)
{
byte[] sector = new byte[sectorSize];
imageStream.Read(sector, 0, sector.Length);
imageStream.Seek(sectorSkip, SeekOrigin.Current);
Array.Copy(sector, 0, buffer, i * sectorSize, sectorSize);
}
switch(aaruTrack.TrackType)
{
case TrackType.CdMode1 when aaruTrack.TrackRawBytesPerSector == 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;
}
case TrackType.CdMode2Formless when aaruTrack.TrackRawBytesPerSector == 2336:
{
byte[] fullSector = new byte[2352];
byte[] fullBuffer = new byte[2352 * length];
for(uint i = 0; i < length; i++)
{
_sectorBuilder.ReconstructPrefix(ref fullSector, TrackType.CdMode2Formless,
(long)(sectorAddress + i));
Array.Copy(buffer, i * 2336, fullSector, 16, 2336);
Array.Copy(fullSector, 0, fullBuffer, i * 2352, 2352);
}
buffer = fullBuffer;
break;
}
}
return buffer;
}
public List<Track> GetSessionTracks(Session session)
{
if(Sessions.Contains(session))
return GetSessionTracks(session.SessionSequence);
throw new ImageNotSupportedException("Session does not exist in disc image");
}
public List<Track> GetSessionTracks(ushort session) =>
Tracks.Where(track => track.TrackSession == session).ToList();
}
}
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