// /***************************************************************************
// The Disc Image Chef
// ----------------------------------------------------------------------------
//
// Filename       : CDRWin.cs
// Author(s)      : Natalia Portillo <claunia@claunia.com>
//
// Component      : Disc image plugins.
//
// --[ Description ] ----------------------------------------------------------
//
//     Manages CDRWin cuesheets (cue/bin).
//
// --[ 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 © 2011-2018 Natalia Portillo
// ****************************************************************************/

using System;
using System.Collections.Generic;
using System.IO;
using System.Text;
using System.Text.RegularExpressions;
using DiscImageChef.CommonTypes;
using DiscImageChef.Console;
using DiscImageChef.Filters;

namespace DiscImageChef.DiscImages
{
    // TODO: Implement track flags
    public class CdrWin : ImagePlugin
    {
        #region Internal structures
        struct CdrWinTrackFile
        {
            /// <summary>Track #</summary>
            public uint Sequence;
            /// <summary>Filter of file containing track</summary>
            public Filter Datafilter;
            /// <summary>Offset of track start in file</summary>
            public ulong Offset;
            /// <summary>Type of file</summary>
            public string Filetype;
        }

        struct CdrWinTrack
        {
            /// <summary>Track #</summary>
            public uint Sequence;
            /// <summary>Track title (from CD-Text)</summary>
            public string Title;
            /// <summary>Track genre (from CD-Text)</summary>
            public string Genre;
            /// <summary>Track arranger (from CD-Text)</summary>
            public string Arranger;
            /// <summary>Track composer (from CD-Text)</summary>
            public string Composer;
            /// <summary>Track performer (from CD-Text)</summary>
            public string Performer;
            /// <summary>Track song writer (from CD-Text)</summary>
            public string Songwriter;
            /// <summary>Track ISRC</summary>
            public string Isrc;
            /// <summary>File struct for this track</summary>
            public CdrWinTrackFile Trackfile;
            /// <summary>Indexes on this track</summary>
            public Dictionary<int, ulong> Indexes;
            /// <summary>Track pre-gap in sectors</summary>
            public ulong Pregap;
            /// <summary>Track post-gap in sectors</summary>
            public ulong Postgap;
            /// <summary>Digical Copy Permitted</summary>
            public bool FlagDcp;
            /// <summary>Track is quadraphonic</summary>
            public bool Flag4ch;
            /// <summary>Track has preemphasis</summary>
            public bool FlagPre;
            /// <summary>Track has SCMS</summary>
            public bool FlagScms;
            /// <summary>Bytes per sector</summary>
            public ushort Bps;
            /// <summary>Sectors in track</summary>
            public ulong Sectors;
            /// <summary>Track type</summary>
            public string Tracktype;
            /// <summary>Track session</summary>
            public ushort Session;
        }
        #endregion

        struct CdrWinDisc
        {
            /// <summary>Disk title (from CD-Text)</summary>
            public string Title;
            /// <summary>Disk genre (from CD-Text)</summary>
            public string Genre;
            /// <summary>Disk arranger (from CD-Text)</summary>
            public string Arranger;
            /// <summary>Disk composer (from CD-Text)</summary>
            public string Composer;
            /// <summary>Disk performer (from CD-Text)</summary>
            public string Performer;
            /// <summary>Disk song writer (from CD-Text)</summary>
            public string Songwriter;
            /// <summary>Media catalog number</summary>
            public string Mcn;
            /// <summary>Disk type</summary>
            public MediaType Disktype;
            /// <summary>Disk type string</summary>
            public string Disktypestr;
            /// <summary>Disk CDDB ID</summary>
            public string DiskId;
            /// <summary>Disk UPC/EAN</summary>
            public string Barcode;
            /// <summary>Sessions</summary>
            public List<Session> Sessions;
            /// <summary>Tracks</summary>
            public List<CdrWinTrack> Tracks;
            /// <summary>Disk comment</summary>
            public string Comment;
            /// <summary>File containing CD-Text</summary>
            public string Cdtextfile;
        }

        #region Internal consts
        // Type for FILE entity
        /// <summary>Data as-is in little-endian</summary>
        const string CDRWIN_DISK_TYPE_LITTLE_ENDIAN = "BINARY";
        /// <summary>Data as-is in big-endian</summary>
        const string CDRWIN_DISK_TYPE_BIG_ENDIAN = "MOTOROLA";
        /// <summary>Audio in Apple AIF file</summary>
        const string CDRWIN_DISK_TYPE_AIFF = "AIFF";
        /// <summary>Audio in Microsoft WAV file</summary>
        const string CDRWIN_DISK_TYPE_RIFF = "WAVE";
        /// <summary>Audio in MP3 file</summary>
        const string CDRWIN_DISK_TYPE_MP3 = "MP3";

        // Type for TRACK entity
        /// <summary>Audio track, 2352 bytes/sector</summary>
        const string CDRWIN_TRACK_TYPE_AUDIO = "AUDIO";
        /// <summary>CD+G track, 2448 bytes/sector (audio+subchannel)</summary>
        const string CDRWIN_TRACK_TYPE_CDG = "CDG";
        /// <summary>Mode 1 track, cooked, 2048 bytes/sector</summary>
        const string CDRWIN_TRACK_TYPE_MODE1 = "MODE1/2048";
        /// <summary>Mode 1 track, raw, 2352 bytes/sector</summary>
        const string CDRWIN_TRACK_TYPE_MODE1_RAW = "MODE1/2352";
        /// <summary>Mode 2 form 1 track, cooked, 2048 bytes/sector</summary>
        const string CDRWIN_TRACK_TYPE_MODE2_FORM1 = "MODE2/2048";
        /// <summary>Mode 2 form 2 track, cooked, 2324 bytes/sector</summary>
        const string CDRWIN_TRACK_TYPE_MODE2_FORM2 = "MODE2/2324";
        /// <summary>Mode 2 formless track, cooked, 2336 bytes/sector</summary>
        const string CDRWIN_TRACK_TYPE_MODE2_FORMLESS = "MODE2/2336";
        /// <summary>Mode 2 track, raw, 2352 bytes/sector</summary>
        const string CDRWIN_TRACK_TYPE_MODE2_RAW = "MODE2/2352";
        /// <summary>CD-i track, cooked, 2336 bytes/sector</summary>
        const string CDRWIN_TRACK_TYPE_CDI = "CDI/2336";
        /// <summary>CD-i track, raw, 2352 bytes/sector</summary>
        const string CDRWIN_TRACK_TYPE_CDI_RAW = "CDI/2352";

        // Type for REM ORIGINAL MEDIA-TYPE entity
        /// <summary>DiskType.CD</summary>
        const string CDRWIN_DISK_TYPE_CD = "CD";
        /// <summary>DiskType.CDRW</summary>
        const string CDRWIN_DISK_TYPE_CDRW = "CD-RW";
        /// <summary>DiskType.CDMRW</summary>
        const string CDRWIN_DISK_TYPE_CDMRW = "CD-MRW";
        /// <summary>DiskType.CDMRW</summary>
        const string CDRWIN_DISK_TYPE_CDMRW2 = "CD-(MRW)";
        /// <summary>DiskType.DVDROM</summary>
        const string CDRWIN_DISK_TYPE_DVD = "DVD";
        /// <summary>DiskType.DVDPRW</summary>
        const string CDRWIN_DISK_TYPE_DVDPMRW = "DVD+MRW";
        /// <summary>DiskType.DVDPRW</summary>
        const string CDRWIN_DISK_TYPE_DVDPMRW2 = "DVD+(MRW)";
        /// <summary>DiskType.DVDPRWDL</summary>
        const string CDRWIN_DISK_TYPE_DVDPMRWDL = "DVD+MRW DL";
        /// <summary>DiskType.DVDPRWDL</summary>
        const string CDRWIN_DISK_TYPE_DVDPMRWDL2 = "DVD+(MRW) DL";
        /// <summary>DiskType.DVDPR</summary>
        const string CDRWIN_DISK_TYPE_DVDPR = "DVD+R";
        /// <summary>DiskType.DVDPRDL</summary>
        const string CDRWIN_DISK_TYPE_DVDPRDL = "DVD+R DL";
        /// <summary>DiskType.DVDPRW</summary>
        const string CDRWIN_DISK_TYPE_DVDPRW = "DVD+RW";
        /// <summary>DiskType.DVDPRWDL</summary>
        const string CDRWIN_DISK_TYPE_DVDPRWDL = "DVD+RW DL";
        /// <summary>DiskType.DVDPR</summary>
        const string CDRWIN_DISK_TYPE_DVDPVR = "DVD+VR";
        /// <summary>DiskType.DVDRAM</summary>
        const string CDRWIN_DISK_TYPE_DVDRAM = "DVD-RAM";
        /// <summary>DiskType.DVDR</summary>
        const string CDRWIN_DISK_TYPE_DVDR = "DVD-R";
        /// <summary>DiskType.DVDRDL</summary>
        const string CDRWIN_DISK_TYPE_DVDRDL = "DVD-R DL";
        /// <summary>DiskType.DVDRW</summary>
        const string CDRWIN_DISK_TYPE_DVDRW = "DVD-RW";
        /// <summary>DiskType.DVDRWDL</summary>
        const string CDRWIN_DISK_TYPE_DVDRWDL = "DVD-RW DL";
        /// <summary>DiskType.DVDR</summary>
        const string CDRWIN_DISK_TYPE_DVDVR = "DVD-VR";
        /// <summary>DiskType.DVDRW</summary>
        const string CDRWIN_DISK_TYPE_DVDRW2 = "DVDRW";
        /// <summary>DiskType.HDDVDROM</summary>
        const string CDRWIN_DISK_TYPE_HDDVD = "HD DVD";
        /// <summary>DiskType.HDDVDRAM</summary>
        const string CDRWIN_DISK_TYPE_HDDVDRAM = "HD DVD-RAM";
        /// <summary>DiskType.HDDVDR</summary>
        const string CDRWIN_DISK_TYPE_HDDVDR = "HD DVD-R";
        /// <summary>DiskType.HDDVDR</summary>
        const string CDRWIN_DISK_TYPE_HDDVDRDL = "HD DVD-R DL";
        /// <summary>DiskType.HDDVDRW</summary>
        const string CDRWIN_DISK_TYPE_HDDVDRW = "HD DVD-RW";
        /// <summary>DiskType.HDDVDRW</summary>
        const string CDRWIN_DISK_TYPE_HDDVDRWDL = "HD DVD-RW DL";
        /// <summary>DiskType.BDROM</summary>
        const string CDRWIN_DISK_TYPE_BD = "BD";
        /// <summary>DiskType.BDR</summary>
        const string CDRWIN_DISK_TYPE_BDR = "BD-R";
        /// <summary>DiskType.BDRE</summary>
        const string CDRWIN_DISK_TYPE_BDRE = "BD-RE";
        /// <summary>DiskType.BDR</summary>
        const string CDRWIN_DISK_TYPE_BDRDL = "BD-R DL";
        /// <summary>DiskType.BDRE</summary>
        const string CDRWIN_DISK_TYPE_BDREDL = "BD-RE DL";
        #endregion

        #region Internal variables
        Filter imageFilter;
        StreamReader cueStream;
        Stream imageStream;
        /// <summary>Dictionary, index is track #, value is TrackFile</summary>
        Dictionary<uint, ulong> offsetmap;
        CdrWinDisc discimage;
        List<Partition> partitions;
        #endregion

        #region Parsing regexs
        const string SESSION_REGEX = "\\bREM\\s+SESSION\\s+(?<number>\\d+).*$";
        const string DISK_TYPE_REGEX = "\\bREM\\s+ORIGINAL MEDIA-TYPE:\\s+(?<mediatype>.+)$";
        const string LEAD_OUT_REGEX = "\\bREM\\s+LEAD-OUT\\s+(?<msf>[\\d]+:[\\d]+:[\\d]+)$";
        // Not checked
        const string LBA_REGEX = "\\bREM MSF:\\s+(?<msf>[\\d]+:[\\d]+:[\\d]+)\\s+=\\s+LBA:\\s+(?<lba>[\\d]+)$";
        const string DISK_ID_REGEX = "\\bDISC_ID\\s+(?<diskid>[\\da-f]{8})$";
        const string BAR_CODE_REGEX = "\\bUPC_EAN\\s+(?<barcode>[\\d]{12,13})$";
        const string COMMENT_REGEX = "\\bREM\\s+(?<comment>.+)$";
        const string CD_TEXT_REGEX = "\\bCDTEXTFILE\\s+(?<filename>.+)$";
        const string MCN_REGEX = "\\bCATALOG\\s+(?<catalog>\\d{13})$";
        const string TITLE_REGEX = "\\bTITLE\\s+(?<title>.+)$";
        const string GENRE_REGEX = "\\bGENRE\\s+(?<genre>.+)$";
        const string ARRANGER_REGEX = "\\bARRANGER\\s+(?<arranger>.+)$";
        const string COMPOSER_REGEX = "\\bCOMPOSER\\s+(?<composer>.+)$";
        const string PERFORMER_REGEX = "\\bPERFORMER\\s+(?<performer>.+)$";
        const string SONG_WRITER_REGEX = "\\bSONGWRITER\\s+(?<songwriter>.+)$";
        const string FILE_REGEX = "\\bFILE\\s+(?<filename>.+)\\s+(?<type>\\S+)$";
        const string TRACK_REGEX = "\\bTRACK\\s+(?<number>\\d+)\\s+(?<type>\\S+)$";
        const string ISRC_REGEX = "\\bISRC\\s+(?<isrc>\\w{12})$";
        const string INDEX_REGEX = "\\bINDEX\\s+(?<index>\\d+)\\s+(?<msf>[\\d]+:[\\d]+:[\\d]+)$";
        const string PREGAP_REGEX = "\\bPREGAP\\s+(?<msf>[\\d]+:[\\d]+:[\\d]+)$";
        const string POSTGAP_REGEX = "\\bPOSTGAP\\s+(?<msf>[\\d]+:[\\d]+:[\\d]+)$";
        const string FLAGS_REGEX = "\\bFLAGS\\s+(((?<dcp>DCP)|(?<quad>4CH)|(?<pre>PRE)|(?<scms>SCMS))\\s*)+$";
        #endregion

        #region Methods
        public CdrWin()
        {
            Name = "CDRWin cuesheet";
            PluginUuid = new Guid("664568B2-15D4-4E64-8A7A-20BDA8B8386F");
            ImageInfo = new ImageInfo();
            ImageInfo.ReadableSectorTags = new List<SectorTagType>();
            ImageInfo.ReadableMediaTags = new List<MediaTagType>();
            ImageInfo.ImageHasPartitions = true;
            ImageInfo.ImageHasSessions = true;
            ImageInfo.ImageVersion = null;
            ImageInfo.ImageApplicationVersion = null;
            ImageInfo.ImageName = null;
            ImageInfo.ImageCreator = null;
            ImageInfo.MediaManufacturer = null;
            ImageInfo.MediaModel = null;
            ImageInfo.MediaPartNumber = null;
            ImageInfo.MediaSequence = 0;
            ImageInfo.LastMediaSequence = 0;
            ImageInfo.DriveManufacturer = null;
            ImageInfo.DriveModel = null;
            ImageInfo.DriveSerialNumber = null;
            ImageInfo.DriveFirmwareRevision = null;
        }

        // Due to .cue format, this method must parse whole file, ignoring errors (those will be thrown by OpenImage()).
        public override bool IdentifyImage(Filter imageFilter)
        {
            this.imageFilter = imageFilter;

            try
            {
                imageFilter.GetDataForkStream().Seek(0, SeekOrigin.Begin);
                byte[] testArray = new byte[512];
                imageFilter.GetDataForkStream().Read(testArray, 0, 512);
                imageFilter.GetDataForkStream().Seek(0, SeekOrigin.Begin);
                // Check for unexpected control characters that shouldn't be present in a text file and can crash this plugin
                bool twoConsecutiveNulls = false;
                for(int i = 0; i < 512; i++)
                {
                    if(i >= imageFilter.GetDataForkStream().Length) break;

                    if(testArray[i] == 0)
                    {
                        if(twoConsecutiveNulls) return false;

                        twoConsecutiveNulls = true;
                    }
                    else twoConsecutiveNulls = false;

                    if(testArray[i] < 0x20 && testArray[i] != 0x0A && testArray[i] != 0x0D && testArray[i] != 0x00)
                        return false;
                }

                cueStream = new StreamReader(this.imageFilter.GetDataForkStream());
                int line = 0;

                while(cueStream.Peek() >= 0)
                {
                    line++;
                    string _line = cueStream.ReadLine();

                    Regex sr = new Regex(SESSION_REGEX);
                    Regex rr = new Regex(COMMENT_REGEX);
                    Regex cr = new Regex(MCN_REGEX);
                    Regex fr = new Regex(FILE_REGEX);
                    Regex tr = new Regex(CD_TEXT_REGEX);

                    Match sm;
                    Match rm;
                    Match cm;
                    Match fm;
                    Match tm;

                    // First line must be SESSION, REM, CATALOG,  FILE or CDTEXTFILE.
                    sm = sr.Match(_line);
                    rm = rr.Match(_line);
                    cm = cr.Match(_line);
                    fm = fr.Match(_line);
                    tm = tr.Match(_line);

                    if(!sm.Success && !rm.Success && !cm.Success && !fm.Success && !tm.Success) return false;

                    return true;
                }

                return false;
            }
            catch(Exception ex)
            {
                DicConsole.ErrorWriteLine("Exception trying to identify image file {0}", this.imageFilter);
                DicConsole.ErrorWriteLine("Exception: {0}", ex.Message);
                DicConsole.ErrorWriteLine("Stack trace: {0}", ex.StackTrace);
                return false;
            }
        }

        public override bool OpenImage(Filter imageFilter)
        {
            if(imageFilter == null) return false;

            this.imageFilter = imageFilter;

            try
            {
                imageFilter.GetDataForkStream().Seek(0, SeekOrigin.Begin);
                cueStream = new StreamReader(imageFilter.GetDataForkStream());
                int line = 0;
                bool intrack = false;
                byte currentsession = 1;

                // Initialize all RegExs
                Regex regexSession = new Regex(SESSION_REGEX);
                Regex regexDiskType = new Regex(DISK_TYPE_REGEX);
                Regex regexLeadOut = new Regex(LEAD_OUT_REGEX);
                Regex regexLba = new Regex(LBA_REGEX);
                Regex regexDiskId = new Regex(DISK_ID_REGEX);
                Regex regexBarCode = new Regex(BAR_CODE_REGEX);
                Regex regexComment = new Regex(COMMENT_REGEX);
                Regex regexCdText = new Regex(CD_TEXT_REGEX);
                Regex regexMcn = new Regex(MCN_REGEX);
                Regex regexTitle = new Regex(TITLE_REGEX);
                Regex regexGenre = new Regex(GENRE_REGEX);
                Regex regexArranger = new Regex(ARRANGER_REGEX);
                Regex regexComposer = new Regex(COMPOSER_REGEX);
                Regex regexPerformer = new Regex(PERFORMER_REGEX);
                Regex regexSongWriter = new Regex(SONG_WRITER_REGEX);
                Regex regexFile = new Regex(FILE_REGEX);
                Regex regexTrack = new Regex(TRACK_REGEX);
                Regex regexIsrc = new Regex(ISRC_REGEX);
                Regex regexIndex = new Regex(INDEX_REGEX);
                Regex regexPregap = new Regex(PREGAP_REGEX);
                Regex regexPostgap = new Regex(POSTGAP_REGEX);
                Regex regexFlags = new Regex(FLAGS_REGEX);

                // Initialize all RegEx matches
                Match matchSession;
                Match matchDiskType;
                Match matchLeadOut;
                Match matchLba;
                Match matchDiskId;
                Match matchBarCode;
                Match matchComment;
                Match matchCdText;
                Match matchMcn;
                Match matchTitle;
                Match matchGenre;
                Match matchArranger;
                Match matchComposer;
                Match matchPerformer;
                Match matchSongWriter;
                Match matchFile;
                Match matchTrack;
                Match matchIsrc;
                Match matchIndex;
                Match matchPregap;
                Match matchPostgap;
                Match matchFlags;

                // Initialize disc
                discimage = new CdrWinDisc();
                discimage.Sessions = new List<Session>();
                discimage.Tracks = new List<CdrWinTrack>();
                discimage.Comment = "";

                CdrWinTrack currenttrack = new CdrWinTrack();
                currenttrack.Indexes = new Dictionary<int, ulong>();
                CdrWinTrackFile currentfile = new CdrWinTrackFile();
                ulong currentfileoffsetsector = 0;

                CdrWinTrack[] cuetracks;
                int trackCount = 0;

                while(cueStream.Peek() >= 0)
                {
                    line++;
                    string _line = cueStream.ReadLine();

                    matchTrack = regexTrack.Match(_line);
                    if(matchTrack.Success)
                    {
                        uint trackSeq = uint.Parse(matchTrack.Groups[1].Value);
                        if(trackCount + 1 != trackSeq)
                            throw new
                                FeatureUnsupportedImageException(string
                                                                     .Format("Found TRACK {0} out of order in line {1}",
                                                                             trackSeq, line));

                        trackCount++;
                    }
                }

                if(trackCount == 0) throw new FeatureUnsupportedImageException("No tracks found");

                cuetracks = new CdrWinTrack[trackCount];

                line = 0;
                imageFilter.GetDataForkStream().Seek(0, SeekOrigin.Begin);
                cueStream = new StreamReader(imageFilter.GetDataForkStream());

                FiltersList filtersList = new FiltersList();

                while(cueStream.Peek() >= 0)
                {
                    line++;
                    string _line = cueStream.ReadLine();

                    matchSession = regexSession.Match(_line);
                    matchDiskType = regexDiskType.Match(_line);
                    matchComment = regexComment.Match(_line);
                    matchLba = regexLba.Match(_line); // Unhandled, just ignored
                    matchLeadOut = regexLeadOut.Match(_line); // Unhandled, just ignored

                    if(matchDiskType.Success && !intrack)
                    {
                        DicConsole.DebugWriteLine("CDRWin plugin", "Found REM ORIGINAL MEDIA TYPE at line {0}", line);
                        discimage.Disktypestr = matchDiskType.Groups[1].Value;
                    }
                    else if(matchDiskType.Success && intrack)
                    {
                        throw new
                            FeatureUnsupportedImageException(string
                                                                 .Format("Found REM ORIGINAL MEDIA TYPE field after a track in line {0}",
                                                                         line));
                    }
                    else if(matchSession.Success)
                    {
                        DicConsole.DebugWriteLine("CDRWin plugin", "Found REM SESSION at line {0}", line);
                        currentsession = byte.Parse(matchSession.Groups[1].Value);

                        // What happens between sessions
                    }
                    else if(matchLba.Success)
                    {
                        DicConsole.DebugWriteLine("CDRWin plugin", "Found REM MSF at line {0}", line);
                        // Just ignored
                    }
                    else if(matchLeadOut.Success)
                    {
                        DicConsole.DebugWriteLine("CDRWin plugin", "Found REM LEAD-OUT at line {0}", line);
                        // Just ignored
                    }
                    else if(matchComment.Success)
                    {
                        DicConsole.DebugWriteLine("CDRWin plugin", "Found REM at line {0}", line);
                        if(discimage.Comment == "") discimage.Comment = matchComment.Groups[1].Value; // First comment
                        else
                            discimage.Comment +=
                                Environment.NewLine + matchComment.Groups[1].Value; // Append new comments as new lines
                    }
                    else
                    {
                        matchTrack = regexTrack.Match(_line);
                        matchTitle = regexTitle.Match(_line);
                        matchSongWriter = regexSongWriter.Match(_line);
                        matchPregap = regexPregap.Match(_line);
                        matchPostgap = regexPostgap.Match(_line);
                        matchPerformer = regexPerformer.Match(_line);
                        matchMcn = regexMcn.Match(_line);
                        matchIsrc = regexIsrc.Match(_line);
                        matchIndex = regexIndex.Match(_line);
                        matchGenre = regexGenre.Match(_line);
                        matchFlags = regexFlags.Match(_line);
                        matchFile = regexFile.Match(_line);
                        matchDiskId = regexDiskId.Match(_line);
                        matchComposer = regexComposer.Match(_line);
                        matchCdText = regexCdText.Match(_line);
                        matchBarCode = regexBarCode.Match(_line);
                        matchArranger = regexArranger.Match(_line);

                        if(matchArranger.Success)
                        {
                            DicConsole.DebugWriteLine("CDRWin plugin", "Found ARRANGER at line {0}", line);
                            if(intrack) currenttrack.Arranger = matchArranger.Groups[1].Value;
                            else discimage.Arranger = matchArranger.Groups[1].Value;
                        }
                        else if(matchBarCode.Success)
                        {
                            DicConsole.DebugWriteLine("CDRWin plugin", "Found UPC_EAN at line {0}", line);
                            if(!intrack) discimage.Barcode = matchBarCode.Groups[1].Value;
                            else
                                throw new
                                    FeatureUnsupportedImageException(string
                                                                         .Format("Found barcode field in incorrect place at line {0}",
                                                                                 line));
                        }
                        else if(matchCdText.Success)
                        {
                            DicConsole.DebugWriteLine("CDRWin plugin", "Found CDTEXTFILE at line {0}", line);
                            if(!intrack) discimage.Cdtextfile = matchCdText.Groups[1].Value;
                            else
                                throw new
                                    FeatureUnsupportedImageException(string
                                                                         .Format("Found CD-Text file field in incorrect place at line {0}",
                                                                                 line));
                        }
                        else if(matchComposer.Success)
                        {
                            DicConsole.DebugWriteLine("CDRWin plugin", "Found COMPOSER at line {0}", line);
                            if(intrack) currenttrack.Composer = matchComposer.Groups[1].Value;
                            else discimage.Composer = matchComposer.Groups[1].Value;
                        }
                        else if(matchDiskId.Success)
                        {
                            DicConsole.DebugWriteLine("CDRWin plugin", "Found DISC_ID at line {0}", line);
                            if(!intrack) discimage.DiskId = matchDiskId.Groups[1].Value;
                            else
                                throw new
                                    FeatureUnsupportedImageException(string
                                                                         .Format("Found CDDB ID field in incorrect place at line {0}",
                                                                                 line));
                        }
                        else if(matchFile.Success)
                        {
                            DicConsole.DebugWriteLine("CDRWin plugin", "Found FILE at line {0}", line);

                            if(currenttrack.Sequence != 0)
                            {
                                currentfile.Sequence = currenttrack.Sequence;
                                currenttrack.Trackfile = currentfile;
                                currenttrack.Sectors =
                                    ((ulong)currentfile.Datafilter.GetLength() - currentfile.Offset) /
                                    CdrWinTrackTypeToBytesPerSector(currenttrack.Tracktype);
                                cuetracks[currenttrack.Sequence - 1] = currenttrack;
                                intrack = false;
                                currenttrack = new CdrWinTrack();
                                currentfile = new CdrWinTrackFile();
                                filtersList = new FiltersList();
                            }

                            //currentfile = new CDRWinTrackFile();
                            string datafile = matchFile.Groups[1].Value;
                            currentfile.Filetype = matchFile.Groups[2].Value;

                            // Check if file path is quoted
                            if(datafile[0] == '"' && datafile[datafile.Length - 1] == '"')
                            {
                                datafile = datafile.Substring(1, datafile.Length - 2); // Unquote it
                            }

                            currentfile.Datafilter = filtersList.GetFilter(datafile);

                            // Check if file exists
                            if(currentfile.Datafilter == null)
                            {
                                if(datafile[0] == '/' || (datafile[0] == '/' && datafile[1] == '.')
                                ) // UNIX absolute path
                                {
                                    Regex unixpath = new Regex("^(.+)/([^/]+)$");
                                    Match unixpathmatch = unixpath.Match(datafile);

                                    if(unixpathmatch.Success)
                                    {
                                        currentfile.Datafilter = filtersList.GetFilter(unixpathmatch.Groups[1].Value);

                                        if(currentfile.Datafilter == null)
                                        {
                                            string path = imageFilter.GetParentFolder() + Path.PathSeparator +
                                                          unixpathmatch.Groups[1].Value;
                                            currentfile.Datafilter = filtersList.GetFilter(path);

                                            if(currentfile.Datafilter == null)
                                                throw new
                                                    FeatureUnsupportedImageException(string
                                                                                         .Format("File \"{0}\" not found.",
                                                                                                 matchFile
                                                                                                     .Groups[1].Value));
                                        }
                                    }
                                    else
                                        throw new
                                            FeatureUnsupportedImageException(string.Format("File \"{0}\" not found.",
                                                                                           matchFile.Groups[1].Value));
                                }
                                else if((datafile[1] == ':' && datafile[2] == '\\') ||
                                        (datafile[0] == '\\' && datafile[1] == '\\') ||
                                        ((datafile[0] == '.' && datafile[1] == '\\'))) // Windows absolute path
                                {
                                    Regex winpath =
                                        new
                                            Regex("^(?:[a-zA-Z]\\:(\\\\|\\/)|file\\:\\/\\/|\\\\\\\\|\\.(\\/|\\\\))([^\\\\\\/\\:\\*\\?\\<\\>\\\"\\|]+(\\\\|\\/){0,1})+$");
                                    Match winpathmatch = winpath.Match(datafile);
                                    if(winpathmatch.Success)
                                    {
                                        currentfile.Datafilter = filtersList.GetFilter(winpathmatch.Groups[1].Value);

                                        if(currentfile.Datafilter == null)
                                        {
                                            string path = imageFilter.GetParentFolder() + Path.PathSeparator +
                                                          winpathmatch.Groups[1].Value;
                                            currentfile.Datafilter = filtersList.GetFilter(path);

                                            if(currentfile.Datafilter == null)
                                                throw new
                                                    FeatureUnsupportedImageException(string
                                                                                         .Format("File \"{0}\" not found.",
                                                                                                 matchFile
                                                                                                     .Groups[1].Value));
                                        }
                                    }
                                    else
                                        throw new
                                            FeatureUnsupportedImageException(string.Format("File \"{0}\" not found.",
                                                                                           matchFile.Groups[1].Value));
                                }
                                else
                                {
                                    string path = imageFilter.GetParentFolder() + Path.PathSeparator + datafile;
                                    currentfile.Datafilter = filtersList.GetFilter(path);

                                    if(currentfile.Datafilter == null)
                                        throw new
                                            FeatureUnsupportedImageException(string.Format("File \"{0}\" not found.",
                                                                                           matchFile.Groups[1].Value));
                                }
                            }

                            // File does exist, process it
                            DicConsole.DebugWriteLine("CDRWin plugin", "File \"{0}\" found",
                                                      currentfile.Datafilter.GetFilename());

                            switch(currentfile.Filetype)
                            {
                                case CDRWIN_DISK_TYPE_LITTLE_ENDIAN: break;
                                case CDRWIN_DISK_TYPE_BIG_ENDIAN:
                                case CDRWIN_DISK_TYPE_AIFF:
                                case CDRWIN_DISK_TYPE_RIFF:
                                case CDRWIN_DISK_TYPE_MP3:
                                    throw new
                                        FeatureSupportedButNotImplementedImageException(string
                                                                                            .Format("Unsupported file type {0}",
                                                                                                    currentfile
                                                                                                        .Filetype));
                                default:
                                    throw new FeatureUnsupportedImageException(string.Format("Unknown file type {0}",
                                                                                             currentfile.Filetype));
                            }

                            currentfile.Offset = 0;
                            currentfile.Sequence = 0;
                        }
                        else if(matchFlags.Success)
                        {
                            DicConsole.DebugWriteLine("CDRWin plugin", "Found FLAGS at line {0}", line);
                            if(!intrack)
                                throw new
                                    FeatureUnsupportedImageException(string
                                                                         .Format("Found FLAGS field in incorrect place at line {0}",
                                                                                 line));

                            currenttrack.FlagDcp |= matchFile.Groups["dcp"].Value == "DCP";
                            currenttrack.Flag4ch |= matchFile.Groups["quad"].Value == "4CH";
                            currenttrack.FlagPre |= matchFile.Groups["pre"].Value == "PRE";
                            currenttrack.FlagScms |= matchFile.Groups["scms"].Value == "SCMS";
                        }
                        else if(matchGenre.Success)
                        {
                            DicConsole.DebugWriteLine("CDRWin plugin", "Found GENRE at line {0}", line);
                            if(intrack) currenttrack.Genre = matchGenre.Groups[1].Value;
                            else discimage.Genre = matchGenre.Groups[1].Value;
                        }
                        else if(matchIndex.Success)
                        {
                            DicConsole.DebugWriteLine("CDRWin plugin", "Found INDEX at line {0}", line);
                            if(!intrack)
                                throw new
                                    FeatureUnsupportedImageException(string.Format("Found INDEX before a track {0}",
                                                                                   line));
                            else
                            {
                                int index = int.Parse(matchIndex.Groups[1].Value);
                                ulong offset = CdrWinMsftoLba(matchIndex.Groups[2].Value);

                                if((index != 0 && index != 1) && currenttrack.Indexes.Count == 0)
                                    throw new
                                        FeatureUnsupportedImageException(string
                                                                             .Format("Found INDEX {0} before INDEX 00 or INDEX 01",
                                                                                     index));

                                if((index == 0 || (index == 1 && !currenttrack.Indexes.ContainsKey(0))))
                                {
                                    if((int)(currenttrack.Sequence - 2) >= 0 && offset > 1)
                                    {
                                        cuetracks[currenttrack.Sequence - 2].Sectors = offset - currentfileoffsetsector;
                                        currentfile.Offset +=
                                            cuetracks[currenttrack.Sequence - 2].Sectors *
                                            cuetracks[currenttrack.Sequence - 2].Bps;
                                        DicConsole.DebugWriteLine("CDRWin plugin",
                                                                  "Sets currentfile.offset to {0} at line 553",
                                                                  currentfile.Offset);
                                        DicConsole.DebugWriteLine("CDRWin plugin",
                                                                  "cuetracks[currenttrack.sequence-2].sectors = {0}",
                                                                  cuetracks[currenttrack.Sequence - 2].Sectors);
                                        DicConsole.DebugWriteLine("CDRWin plugin",
                                                                  "cuetracks[currenttrack.sequence-2].bps = {0}",
                                                                  cuetracks[currenttrack.Sequence - 2].Bps);
                                    }
                                }

                                if((index == 0 || (index == 1 && !currenttrack.Indexes.ContainsKey(0))) &&
                                   currenttrack.Sequence == 1)
                                {
                                    DicConsole.DebugWriteLine("CDRWin plugin",
                                                              "Sets currentfile.offset to {0} at line 559",
                                                              offset * currenttrack.Bps);
                                    currentfile.Offset = offset * currenttrack.Bps;
                                }

                                currentfileoffsetsector = offset;
                                currenttrack.Indexes.Add(index, offset);
                            }
                        }
                        else if(matchIsrc.Success)
                        {
                            DicConsole.DebugWriteLine("CDRWin plugin", "Found ISRC at line {0}", line);
                            if(!intrack)
                                throw new
                                    FeatureUnsupportedImageException(string.Format("Found ISRC before a track {0}",
                                                                                   line));

                            currenttrack.Isrc = matchIsrc.Groups[1].Value;
                        }
                        else if(matchMcn.Success)
                        {
                            DicConsole.DebugWriteLine("CDRWin plugin", "Found CATALOG at line {0}", line);
                            if(!intrack) discimage.Mcn = matchMcn.Groups[1].Value;
                            else
                                throw new
                                    FeatureUnsupportedImageException(string
                                                                         .Format("Found CATALOG field in incorrect place at line {0}",
                                                                                 line));
                        }
                        else if(matchPerformer.Success)
                        {
                            DicConsole.DebugWriteLine("CDRWin plugin", "Found PERFORMER at line {0}", line);
                            if(intrack) currenttrack.Performer = matchPerformer.Groups[1].Value;
                            else discimage.Performer = matchPerformer.Groups[1].Value;
                        }
                        else if(matchPostgap.Success)
                        {
                            DicConsole.DebugWriteLine("CDRWin plugin", "Found POSTGAP at line {0}", line);
                            if(intrack) { currenttrack.Postgap = CdrWinMsftoLba(matchPostgap.Groups[1].Value); }
                            else
                                throw new
                                    FeatureUnsupportedImageException(string
                                                                         .Format("Found POSTGAP field before a track at line {0}",
                                                                                 line));
                        }
                        else if(matchPregap.Success)
                        {
                            DicConsole.DebugWriteLine("CDRWin plugin", "Found PREGAP at line {0}", line);
                            if(intrack) { currenttrack.Pregap = CdrWinMsftoLba(matchPregap.Groups[1].Value); }
                            else
                                throw new
                                    FeatureUnsupportedImageException(string
                                                                         .Format("Found PREGAP field before a track at line {0}",
                                                                                 line));
                        }
                        else if(matchSongWriter.Success)
                        {
                            DicConsole.DebugWriteLine("CDRWin plugin", "Found SONGWRITER at line {0}", line);
                            if(intrack) currenttrack.Songwriter = matchSongWriter.Groups[1].Value;
                            else discimage.Songwriter = matchSongWriter.Groups[1].Value;
                        }
                        else if(matchTitle.Success)
                        {
                            DicConsole.DebugWriteLine("CDRWin plugin", "Found TITLE at line {0}", line);
                            if(intrack) currenttrack.Title = matchTitle.Groups[1].Value;
                            else discimage.Title = matchTitle.Groups[1].Value;
                        }
                        else if(matchTrack.Success)
                        {
                            DicConsole.DebugWriteLine("CDRWin plugin", "Found TRACK at line {0}", line);
                            if(currentfile.Datafilter == null)
                                throw new
                                    FeatureUnsupportedImageException(string
                                                                         .Format("Found TRACK field before a file is defined at line {0}",
                                                                                 line));

                            if(intrack)
                            {
                                if(currenttrack.Indexes.ContainsKey(0) && currenttrack.Pregap == 0)
                                {
                                    currenttrack.Indexes.TryGetValue(0, out currenttrack.Pregap);
                                }
                                currentfile.Sequence = currenttrack.Sequence;
                                currenttrack.Trackfile = currentfile;
                                cuetracks[currenttrack.Sequence - 1] = currenttrack;
                            }
                            currenttrack = new CdrWinTrack();
                            currenttrack.Indexes = new Dictionary<int, ulong>();
                            currenttrack.Sequence = uint.Parse(matchTrack.Groups[1].Value);
                            DicConsole.DebugWriteLine("CDRWin plugin", "Setting currenttrack.sequence to {0}",
                                                      currenttrack.Sequence);
                            currentfile.Sequence = currenttrack.Sequence;
                            currenttrack.Bps = CdrWinTrackTypeToBytesPerSector(matchTrack.Groups[2].Value);
                            currenttrack.Tracktype = matchTrack.Groups[2].Value;
                            currenttrack.Session = currentsession;
                            intrack = true;
                        }
                        else if(_line == "") // Empty line, ignore it
                        { }
                        else // Non-empty unknown field
                        {
                            throw new
                                FeatureUnsupportedImageException(string
                                                                     .Format("Found unknown field defined at line {0}: \"{1}\"",
                                                                             line, _line));
                        }
                    }
                }

                if(currenttrack.Sequence != 0)
                {
                    currentfile.Sequence = currenttrack.Sequence;
                    currenttrack.Trackfile = currentfile;
                    currenttrack.Sectors = ((ulong)currentfile.Datafilter.GetLength() - currentfile.Offset) /
                                           CdrWinTrackTypeToBytesPerSector(currenttrack.Tracktype);
                    cuetracks[currenttrack.Sequence - 1] = currenttrack;
                }

                Session[] sessions = new Session[currentsession];
                for(int s = 1; s <= sessions.Length; s++)
                {
                    sessions[s - 1].SessionSequence = 1;

                    if(s > 1) sessions[s - 1].StartSector = sessions[s - 2].EndSector + 1;
                    else sessions[s - 1].StartSector = 0;

                    ulong sessionSectors = 0;
                    int lastSessionTrack = 0;

                    for(int i = 0; i < cuetracks.Length; i++)
                    {
                        if(cuetracks[i].Session == s)
                        {
                            sessionSectors += cuetracks[i].Sectors;
                            if(i > lastSessionTrack) lastSessionTrack = i;
                        }
                    }

                    sessions[s - 1].EndTrack = cuetracks[lastSessionTrack].Sequence;
                    sessions[s - 1].EndSector = sessionSectors - 1;
                }

                for(int s = 1; s <= sessions.Length; s++) discimage.Sessions.Add(sessions[s - 1]);

                for(int t = 1; t <= cuetracks.Length; t++) discimage.Tracks.Add(cuetracks[t - 1]);

                discimage.Disktype = CdrWinIsoBusterDiscTypeToMediaType(discimage.Disktypestr);

                if(discimage.Disktype == MediaType.Unknown || discimage.Disktype == MediaType.CD)
                {
                    bool data = false;
                    bool cdg = false;
                    bool cdi = false;
                    bool mode2 = false;
                    bool firstaudio = false;
                    bool firstdata = false;
                    bool audio = false;

                    for(int i = 0; i < discimage.Tracks.Count; i++)
                    {
                        // First track is audio
                        firstaudio |= i == 0 && discimage.Tracks[i].Tracktype == CDRWIN_TRACK_TYPE_AUDIO;

                        // First track is data
                        firstdata |= i == 0 && discimage.Tracks[i].Tracktype != CDRWIN_TRACK_TYPE_AUDIO;

                        // Any non first track is data
                        data |= i != 0 && discimage.Tracks[i].Tracktype != CDRWIN_TRACK_TYPE_AUDIO;

                        // Any non first track is audio
                        audio |= i != 0 && discimage.Tracks[i].Tracktype == CDRWIN_TRACK_TYPE_AUDIO;

                        switch(discimage.Tracks[i].Tracktype)
                        {
                            case CDRWIN_TRACK_TYPE_CDG:
                                cdg = true;
                                break;
                            case CDRWIN_TRACK_TYPE_CDI:
                            case CDRWIN_TRACK_TYPE_CDI_RAW:
                                cdi = true;
                                break;
                            case CDRWIN_TRACK_TYPE_MODE2_FORM1:
                            case CDRWIN_TRACK_TYPE_MODE2_FORM2:
                            case CDRWIN_TRACK_TYPE_MODE2_FORMLESS:
                            case CDRWIN_TRACK_TYPE_MODE2_RAW:
                                mode2 = true;
                                break;
                        }
                    }

                    if(!data && !firstdata) discimage.Disktype = MediaType.CDDA;
                    else if(cdg) discimage.Disktype = MediaType.CDG;
                    else if(cdi) discimage.Disktype = MediaType.CDI;
                    else if(firstaudio && data && discimage.Sessions.Count > 1 && mode2)
                        discimage.Disktype = MediaType.CDPLUS;
                    else if((firstdata && audio) || mode2) discimage.Disktype = MediaType.CDROMXA;
                    else if(!audio) discimage.Disktype = MediaType.CDROM;
                    else discimage.Disktype = MediaType.CD;
                }

                // DEBUG information
                DicConsole.DebugWriteLine("CDRWin plugin", "Disc image parsing results");
                DicConsole.DebugWriteLine("CDRWin plugin", "Disc CD-TEXT:");
                if(discimage.Arranger == null) DicConsole.DebugWriteLine("CDRWin plugin", "\tArranger is not set.");
                else DicConsole.DebugWriteLine("CDRWin plugin", "\tArranger: {0}", discimage.Arranger);
                if(discimage.Composer == null) DicConsole.DebugWriteLine("CDRWin plugin", "\tComposer is not set.");
                else DicConsole.DebugWriteLine("CDRWin plugin", "\tComposer: {0}", discimage.Composer);
                if(discimage.Genre == null) DicConsole.DebugWriteLine("CDRWin plugin", "\tGenre is not set.");
                else DicConsole.DebugWriteLine("CDRWin plugin", "\tGenre: {0}", discimage.Genre);
                if(discimage.Performer == null) DicConsole.DebugWriteLine("CDRWin plugin", "\tPerformer is not set.");
                else DicConsole.DebugWriteLine("CDRWin plugin", "\tPerformer: {0}", discimage.Performer);
                if(discimage.Songwriter == null) DicConsole.DebugWriteLine("CDRWin plugin", "\tSongwriter is not set.");
                else DicConsole.DebugWriteLine("CDRWin plugin", "\tSongwriter: {0}", discimage.Songwriter);
                if(discimage.Title == null) DicConsole.DebugWriteLine("CDRWin plugin", "\tTitle is not set.");
                else DicConsole.DebugWriteLine("CDRWin plugin", "\tTitle: {0}", discimage.Title);
                if(discimage.Cdtextfile == null)
                    DicConsole.DebugWriteLine("CDRWin plugin", "\tCD-TEXT binary file not set.");
                else DicConsole.DebugWriteLine("CDRWin plugin", "\tCD-TEXT binary file: {0}", discimage.Cdtextfile);
                DicConsole.DebugWriteLine("CDRWin plugin", "Disc information:");
                if(discimage.Disktypestr == null)
                    DicConsole.DebugWriteLine("CDRWin plugin", "\tISOBuster disc type not set.");
                else DicConsole.DebugWriteLine("CDRWin plugin", "\tISOBuster disc type: {0}", discimage.Disktypestr);
                DicConsole.DebugWriteLine("CDRWin plugin", "\tGuessed disk type: {0}", discimage.Disktype);
                if(discimage.Barcode == null) DicConsole.DebugWriteLine("CDRWin plugin", "\tBarcode not set.");
                else DicConsole.DebugWriteLine("CDRWin plugin", "\tBarcode: {0}", discimage.Barcode);
                if(discimage.DiskId == null) DicConsole.DebugWriteLine("CDRWin plugin", "\tDisc ID not set.");
                else DicConsole.DebugWriteLine("CDRWin plugin", "\tDisc ID: {0}", discimage.DiskId);
                if(discimage.Mcn == null) DicConsole.DebugWriteLine("CDRWin plugin", "\tMCN not set.");
                else DicConsole.DebugWriteLine("CDRWin plugin", "\tMCN: {0}", discimage.Mcn);
                if(discimage.Comment == null) DicConsole.DebugWriteLine("CDRWin plugin", "\tComment not set.");
                else DicConsole.DebugWriteLine("CDRWin plugin", "\tComment: \"{0}\"", discimage.Comment);
                DicConsole.DebugWriteLine("CDRWin plugin", "Session information:");
                DicConsole.DebugWriteLine("CDRWin plugin", "\tDisc contains {0} sessions", discimage.Sessions.Count);
                for(int i = 0; i < discimage.Sessions.Count; i++)
                {
                    DicConsole.DebugWriteLine("CDRWin plugin", "\tSession {0} information:", i + 1);
                    DicConsole.DebugWriteLine("CDRWin plugin", "\t\tStarting track: {0}",
                                              discimage.Sessions[i].StartTrack);
                    DicConsole.DebugWriteLine("CDRWin plugin", "\t\tStarting sector: {0}",
                                              discimage.Sessions[i].StartSector);
                    DicConsole.DebugWriteLine("CDRWin plugin", "\t\tEnding track: {0}", discimage.Sessions[i].EndTrack);
                    DicConsole.DebugWriteLine("CDRWin plugin", "\t\tEnding sector: {0}",
                                              discimage.Sessions[i].EndSector);
                }

                DicConsole.DebugWriteLine("CDRWin plugin", "Track information:");
                DicConsole.DebugWriteLine("CDRWin plugin", "\tDisc contains {0} tracks", discimage.Tracks.Count);
                for(int i = 0; i < discimage.Tracks.Count; i++)
                {
                    DicConsole.DebugWriteLine("CDRWin plugin", "\tTrack {0} information:",
                                              discimage.Tracks[i].Sequence);

                    DicConsole.DebugWriteLine("CDRWin plugin", "\t\t{0} bytes per sector", discimage.Tracks[i].Bps);
                    DicConsole.DebugWriteLine("CDRWin plugin", "\t\tPregap: {0} sectors", discimage.Tracks[i].Pregap);
                    DicConsole.DebugWriteLine("CDRWin plugin", "\t\tData: {0} sectors", discimage.Tracks[i].Sectors);
                    DicConsole.DebugWriteLine("CDRWin plugin", "\t\tPostgap: {0} sectors", discimage.Tracks[i].Postgap);

                    if(discimage.Tracks[i].Flag4ch)
                        DicConsole.DebugWriteLine("CDRWin plugin", "\t\tTrack is flagged as quadraphonic");
                    if(discimage.Tracks[i].FlagDcp)
                        DicConsole.DebugWriteLine("CDRWin plugin", "\t\tTrack allows digital copy");
                    if(discimage.Tracks[i].FlagPre)
                        DicConsole.DebugWriteLine("CDRWin plugin", "\t\tTrack has pre-emphasis applied");
                    if(discimage.Tracks[i].FlagScms) DicConsole.DebugWriteLine("CDRWin plugin", "\t\tTrack has SCMS");

                    DicConsole.DebugWriteLine("CDRWin plugin",
                                              "\t\tTrack resides in file {0}, type defined as {1}, starting at byte {2}",
                                              discimage.Tracks[i].Trackfile.Datafilter.GetFilename(),
                                              discimage.Tracks[i].Trackfile.Filetype,
                                              discimage.Tracks[i].Trackfile.Offset);

                    DicConsole.DebugWriteLine("CDRWin plugin", "\t\tIndexes:");
                    foreach(KeyValuePair<int, ulong> kvp in discimage.Tracks[i].Indexes)
                        DicConsole.DebugWriteLine("CDRWin plugin", "\t\t\tIndex {0} starts at sector {1}", kvp.Key,
                                                  kvp.Value);

                    if(discimage.Tracks[i].Isrc == null)
                        DicConsole.DebugWriteLine("CDRWin plugin", "\t\tISRC is not set.");
                    else DicConsole.DebugWriteLine("CDRWin plugin", "\t\tISRC: {0}", discimage.Tracks[i].Isrc);

                    if(discimage.Tracks[i].Arranger == null)
                        DicConsole.DebugWriteLine("CDRWin plugin", "\t\tArranger is not set.");
                    else DicConsole.DebugWriteLine("CDRWin plugin", "\t\tArranger: {0}", discimage.Tracks[i].Arranger);
                    if(discimage.Tracks[i].Composer == null)
                        DicConsole.DebugWriteLine("CDRWin plugin", "\t\tComposer is not set.");
                    else DicConsole.DebugWriteLine("CDRWin plugin", "\t\tComposer: {0}", discimage.Tracks[i].Composer);
                    if(discimage.Tracks[i].Genre == null)
                        DicConsole.DebugWriteLine("CDRWin plugin", "\t\tGenre is not set.");
                    else DicConsole.DebugWriteLine("CDRWin plugin", "\t\tGenre: {0}", discimage.Tracks[i].Genre);
                    if(discimage.Tracks[i].Performer == null)
                        DicConsole.DebugWriteLine("CDRWin plugin", "\t\tPerformer is not set.");
                    else
                        DicConsole.DebugWriteLine("CDRWin plugin", "\t\tPerformer: {0}", discimage.Tracks[i].Performer);
                    if(discimage.Tracks[i].Songwriter == null)
                        DicConsole.DebugWriteLine("CDRWin plugin", "\t\tSongwriter is not set.");
                    else
                        DicConsole.DebugWriteLine("CDRWin plugin", "\t\tSongwriter: {0}",
                                                  discimage.Tracks[i].Songwriter);
                    if(discimage.Tracks[i].Title == null)
                        DicConsole.DebugWriteLine("CDRWin plugin", "\t\tTitle is not set.");
                    else DicConsole.DebugWriteLine("CDRWin plugin", "\t\tTitle: {0}", discimage.Tracks[i].Title);
                }

                DicConsole.DebugWriteLine("CDRWin plugin", "Building offset map");

                partitions = new List<Partition>();

                ulong byteOffset = 0;
                ulong sectorOffset = 0;
                ulong partitionSequence = 0;
                ulong indexZeroOffset = 0;
                ulong indexOneOffset = 0;
                bool indexZero = false;

                offsetmap = new Dictionary<uint, ulong>();

                for(int i = 0; i < discimage.Tracks.Count; i++)
                {
                    ulong index0Len = 0;

                    if(discimage.Tracks[i].Sequence == 1 && i != 0)
                        throw new ImageNotSupportedException("Unordered tracks");

                    Partition partition = new Partition();

                    /*if(discimage.tracks[i].pregap > 0)
                    {
                        partition.PartitionDescription = string.Format("Track {0} pregap.", discimage.tracks[i].sequence);
                        partition.PartitionName = discimage.tracks[i].title;
                        partition.PartitionStartSector = sector_offset;
                        partition.PartitionLength = discimage.tracks[i].pregap * discimage.tracks[i].bps;
                        partition.PartitionSectors = discimage.tracks[i].pregap;
                        partition.PartitionSequence = partitionSequence;
                        partition.PartitionStart = byte_offset;
                        partition.PartitionType = discimage.tracks[i].tracktype;

                        sector_offset += partition.PartitionSectors;
                        byte_offset += partition.PartitionLength;
                        partitionSequence++;

                        if(!offsetmap.ContainsKey(discimage.tracks[i].sequence))
                            offsetmap.Add(discimage.tracks[i].sequence, partition.PartitionStartSector);
                        else
                        {
                            ulong old_start;
                            offsetmap.TryGetValue(discimage.tracks[i].sequence, out old_start);

                            if(partition.PartitionStartSector < old_start)
                            {
                                offsetmap.Remove(discimage.tracks[i].sequence);
                                offsetmap.Add(discimage.tracks[i].sequence, partition.PartitionStartSector);
                            }
                        }

                        partitions.Add(partition);
                        partition = new Partition();
                    }*/

                    indexZero |= discimage.Tracks[i].Indexes.TryGetValue(0, out indexZeroOffset);

                    if(!discimage.Tracks[i].Indexes.TryGetValue(1, out indexOneOffset))
                        throw new ImageNotSupportedException(string.Format("Track {0} lacks index 01",
                                                                           discimage.Tracks[i].Sequence));

                    /*if(index_zero && index_one_offset > index_zero_offset)
                    {
                        partition.PartitionDescription = string.Format("Track {0} index 00.", discimage.tracks[i].sequence);
                        partition.PartitionName = discimage.tracks[i].title;
                        partition.PartitionStartSector = sector_offset;
                        partition.PartitionLength = (index_one_offset - index_zero_offset) * discimage.tracks[i].bps;
                        partition.PartitionSectors = index_one_offset - index_zero_offset;
                        partition.PartitionSequence = partitionSequence;
                        partition.PartitionStart = byte_offset;
                        partition.PartitionType = discimage.tracks[i].tracktype;

                        sector_offset += partition.PartitionSectors;
                        byte_offset += partition.PartitionLength;
                        index0_len = partition.PartitionSectors;
                        partitionSequence++;

                        if(!offsetmap.ContainsKey(discimage.tracks[i].sequence))
                            offsetmap.Add(discimage.tracks[i].sequence, partition.PartitionStartSector);
                        else
                        {
                            ulong old_start;
                            offsetmap.TryGetValue(discimage.tracks[i].sequence, out old_start);

                            if(partition.PartitionStartSector < old_start)
                            {
                                offsetmap.Remove(discimage.tracks[i].sequence);
                                offsetmap.Add(discimage.tracks[i].sequence, partition.PartitionStartSector);
                            }
                        }

                        partitions.Add(partition);
                        partition = new Partition();
                    }*/

                    // Index 01
                    partition.Description = string.Format("Track {0}.", discimage.Tracks[i].Sequence);
                    partition.Name = discimage.Tracks[i].Title;
                    partition.Start = sectorOffset;
                    partition.Size = (discimage.Tracks[i].Sectors - index0Len) * discimage.Tracks[i].Bps;
                    partition.Length = (discimage.Tracks[i].Sectors - index0Len);
                    partition.Sequence = partitionSequence;
                    partition.Offset = byteOffset;
                    partition.Type = discimage.Tracks[i].Tracktype;

                    sectorOffset += partition.Length;
                    byteOffset += partition.Size;
                    partitionSequence++;

                    if(!offsetmap.ContainsKey(discimage.Tracks[i].Sequence))
                        offsetmap.Add(discimage.Tracks[i].Sequence, partition.Start);
                    else
                    {
                        ulong oldStart;
                        offsetmap.TryGetValue(discimage.Tracks[i].Sequence, out oldStart);

                        if(partition.Start < oldStart)
                        {
                            offsetmap.Remove(discimage.Tracks[i].Sequence);
                            offsetmap.Add(discimage.Tracks[i].Sequence, partition.Start);
                        }
                    }

                    partitions.Add(partition);
                    partition = new Partition();
                }

                // Print offset map
                DicConsole.DebugWriteLine("CDRWin plugin", "printing partition map");
                foreach(Partition partition in partitions)
                {
                    DicConsole.DebugWriteLine("CDRWin plugin", "Partition sequence: {0}", partition.Sequence);
                    DicConsole.DebugWriteLine("CDRWin plugin", "\tPartition name: {0}", partition.Name);
                    DicConsole.DebugWriteLine("CDRWin plugin", "\tPartition description: {0}", partition.Description);
                    DicConsole.DebugWriteLine("CDRWin plugin", "\tPartition type: {0}", partition.Type);
                    DicConsole.DebugWriteLine("CDRWin plugin", "\tPartition starting sector: {0}", partition.Start);
                    DicConsole.DebugWriteLine("CDRWin plugin", "\tPartition sectors: {0}", partition.Length);
                    DicConsole.DebugWriteLine("CDRWin plugin", "\tPartition starting offset: {0}", partition.Offset);
                    DicConsole.DebugWriteLine("CDRWin plugin", "\tPartition size in bytes: {0}", partition.Size);
                }

                foreach(CdrWinTrack track in discimage.Tracks) ImageInfo.ImageSize += track.Bps * track.Sectors;
                foreach(CdrWinTrack track in discimage.Tracks) ImageInfo.Sectors += track.Sectors;

                if(discimage.Disktype == MediaType.CDG || discimage.Disktype == MediaType.CDEG ||
                   discimage.Disktype == MediaType.CDMIDI)
                    ImageInfo.SectorSize = 2448; // CD+G subchannels ARE user data, as CD+G are useless without them
                else if(discimage.Disktype != MediaType.CDROMXA && discimage.Disktype != MediaType.CDDA &&
                        discimage.Disktype != MediaType.CDI &&
                        discimage.Disktype != MediaType.CDPLUS) ImageInfo.SectorSize = 2048; // Only data tracks
                else ImageInfo.SectorSize = 2352; // All others

                if(discimage.Mcn != null) ImageInfo.ReadableMediaTags.Add(MediaTagType.CD_MCN);
                if(discimage.Cdtextfile != null) ImageInfo.ReadableMediaTags.Add(MediaTagType.CD_TEXT);

                // Detect ISOBuster extensions
                if(discimage.Disktypestr != null || discimage.Comment.ToLower().Contains("isobuster") ||
                   discimage.Sessions.Count > 1) ImageInfo.ImageApplication = "ISOBuster";
                else ImageInfo.ImageApplication = "CDRWin";

                ImageInfo.ImageCreationTime = imageFilter.GetCreationTime();
                ImageInfo.ImageLastModificationTime = imageFilter.GetLastWriteTime();

                ImageInfo.ImageComments = discimage.Comment;
                ImageInfo.MediaSerialNumber = discimage.Mcn;
                ImageInfo.MediaBarcode = discimage.Barcode;
                ImageInfo.MediaType = discimage.Disktype;

                ImageInfo.ReadableSectorTags.Add(SectorTagType.CdTrackFlags);

                foreach(CdrWinTrack track in discimage.Tracks)
                {
                    switch(track.Tracktype)
                    {
                        case CDRWIN_TRACK_TYPE_AUDIO:
                        {
                            if(!ImageInfo.ReadableSectorTags.Contains(SectorTagType.CdTrackIsrc))
                                ImageInfo.ReadableSectorTags.Add(SectorTagType.CdTrackIsrc);
                            break;
                        }
                        case CDRWIN_TRACK_TYPE_CDG:
                        {
                            if(!ImageInfo.ReadableSectorTags.Contains(SectorTagType.CdTrackIsrc))
                                ImageInfo.ReadableSectorTags.Add(SectorTagType.CdTrackIsrc);
                            if(!ImageInfo.ReadableSectorTags.Contains(SectorTagType.CdSectorSubchannel))
                                ImageInfo.ReadableSectorTags.Add(SectorTagType.CdSectorSubchannel);
                            break;
                        }
                        case CDRWIN_TRACK_TYPE_MODE2_FORMLESS:
                        case CDRWIN_TRACK_TYPE_CDI:
                        {
                            if(!ImageInfo.ReadableSectorTags.Contains(SectorTagType.CdSectorSubHeader))
                                ImageInfo.ReadableSectorTags.Add(SectorTagType.CdSectorSubHeader);
                            if(!ImageInfo.ReadableSectorTags.Contains(SectorTagType.CdSectorEdc))
                                ImageInfo.ReadableSectorTags.Add(SectorTagType.CdSectorEdc);
                            break;
                        }
                        case CDRWIN_TRACK_TYPE_MODE2_RAW:
                        case CDRWIN_TRACK_TYPE_CDI_RAW:
                        {
                            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.CdSectorSubHeader))
                                ImageInfo.ReadableSectorTags.Add(SectorTagType.CdSectorSubHeader);
                            if(!ImageInfo.ReadableSectorTags.Contains(SectorTagType.CdSectorEdc))
                                ImageInfo.ReadableSectorTags.Add(SectorTagType.CdSectorEdc);
                            break;
                        }
                        case CDRWIN_TRACK_TYPE_MODE1_RAW:
                        {
                            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.CdSectorSubHeader))
                                ImageInfo.ReadableSectorTags.Add(SectorTagType.CdSectorSubHeader);
                            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;
                        }
                    }
                }

                ImageInfo.XmlMediaType = XmlMediaType.OpticalDisc;

                DicConsole.VerboseWriteLine("CDRWIN image describes a disc of type {0}", ImageInfo.MediaType);
                if(!string.IsNullOrEmpty(ImageInfo.ImageComments))
                    DicConsole.VerboseWriteLine("CDRWIN comments: {0}", ImageInfo.ImageComments);

                return true;
            }
            catch(Exception ex)
            {
                DicConsole.ErrorWriteLine("Exception trying to identify image file {0}", imageFilter.GetFilename());
                DicConsole.ErrorWriteLine("Exception: {0}", ex.Message);
                DicConsole.ErrorWriteLine("Stack trace: {0}", ex.StackTrace);
                return false;
            }
        }

        public override bool ImageHasPartitions()
        {
            return ImageInfo.ImageHasPartitions;
        }

        public override ulong GetImageSize()
        {
            return ImageInfo.ImageSize;
        }

        public override ulong GetSectors()
        {
            return ImageInfo.Sectors;
        }

        public override uint GetSectorSize()
        {
            return ImageInfo.SectorSize;
        }

        public override byte[] ReadDiskTag(MediaTagType tag)
        {
            switch(tag)
            {
                case MediaTagType.CD_MCN:
                {
                    if(discimage.Mcn != null) { return Encoding.ASCII.GetBytes(discimage.Mcn); }

                    throw new FeatureNotPresentImageException("Image does not contain MCN information.");
                }
                case MediaTagType.CD_TEXT:
                {
                    if(discimage.Cdtextfile != null)
                        // TODO: Check that binary text file exists, open it, read it, send it to caller.
                        throw new FeatureSupportedButNotImplementedImageException("Feature not yet implemented");

                    throw new FeatureNotPresentImageException("Image does not contain CD-TEXT information.");
                }
                default:
                    throw new FeatureSupportedButNotImplementedImageException("Feature not supported by image format");
            }
        }

        public override byte[] ReadSector(ulong sectorAddress)
        {
            return ReadSectors(sectorAddress, 1);
        }

        public override byte[] ReadSectorTag(ulong sectorAddress, SectorTagType tag)
        {
            return ReadSectorsTag(sectorAddress, 1, tag);
        }

        public override byte[] ReadSector(ulong sectorAddress, uint track)
        {
            return ReadSectors(sectorAddress, 1, track);
        }

        public override byte[] ReadSectorTag(ulong sectorAddress, uint track, SectorTagType tag)
        {
            return ReadSectorsTag(sectorAddress, 1, track, tag);
        }

        public override byte[] ReadSectors(ulong sectorAddress, uint length)
        {
            foreach(KeyValuePair<uint, ulong> kvp in offsetmap)
            {
                if(sectorAddress >= kvp.Value)
                {
                    foreach(CdrWinTrack cdrwinTrack in discimage.Tracks)
                    {
                        if(cdrwinTrack.Sequence == kvp.Key)
                        {
                            if((sectorAddress - kvp.Value) < cdrwinTrack.Sectors)
                                return ReadSectors((sectorAddress - kvp.Value), length, kvp.Key);
                        }
                    }
                }
            }

            throw new ArgumentOutOfRangeException(nameof(sectorAddress), "Sector address not found");
        }

        public override byte[] ReadSectorsTag(ulong sectorAddress, uint length, SectorTagType tag)
        {
            foreach(KeyValuePair<uint, ulong> kvp in offsetmap)
            {
                if(sectorAddress >= kvp.Value)
                {
                    foreach(CdrWinTrack cdrwinTrack in discimage.Tracks)
                    {
                        if(cdrwinTrack.Sequence == kvp.Key)
                        {
                            if((sectorAddress - kvp.Value) < cdrwinTrack.Sectors)
                                return ReadSectorsTag((sectorAddress - kvp.Value), length, kvp.Key, tag);
                        }
                    }
                }
            }

            throw new ArgumentOutOfRangeException(nameof(sectorAddress), "Sector address not found");
        }

        public override byte[] ReadSectors(ulong sectorAddress, uint length, uint track)
        {
            CdrWinTrack _track = new CdrWinTrack();

            _track.Sequence = 0;

            foreach(CdrWinTrack cdrwinTrack in discimage.Tracks)
            {
                if(cdrwinTrack.Sequence == track)
                {
                    _track = cdrwinTrack;
                    break;
                }
            }

            if(_track.Sequence == 0)
                throw new ArgumentOutOfRangeException(nameof(track), "Track does not exist in disc image");

            if(length > _track.Sectors)
                throw new ArgumentOutOfRangeException(nameof(length),
                                                      "Requested more sectors than present in track, won't cross tracks");

            uint sectorOffset;
            uint sectorSize;
            uint sectorSkip;

            switch(_track.Tracktype)
            {
                case CDRWIN_TRACK_TYPE_MODE1:
                case CDRWIN_TRACK_TYPE_MODE2_FORM1:
                {
                    sectorOffset = 0;
                    sectorSize = 2048;
                    sectorSkip = 0;
                    break;
                }
                case CDRWIN_TRACK_TYPE_MODE2_FORM2:
                {
                    sectorOffset = 0;
                    sectorSize = 2324;
                    sectorSkip = 0;
                    break;
                }
                case CDRWIN_TRACK_TYPE_MODE2_FORMLESS:
                case CDRWIN_TRACK_TYPE_CDI:
                {
                    sectorOffset = 0;
                    sectorSize = 2336;
                    sectorSkip = 0;
                    break;
                }
                case CDRWIN_TRACK_TYPE_AUDIO:
                {
                    sectorOffset = 0;
                    sectorSize = 2352;
                    sectorSkip = 0;
                    break;
                }
                case CDRWIN_TRACK_TYPE_MODE1_RAW:
                {
                    sectorOffset = 16;
                    sectorSize = 2048;
                    sectorSkip = 288;
                    break;
                }
                case CDRWIN_TRACK_TYPE_MODE2_RAW:
                {
                    sectorOffset = 16;
                    sectorSize = 2336;
                    sectorSkip = 0;
                    break;
                }
                case CDRWIN_TRACK_TYPE_CDI_RAW:
                {
                    sectorOffset = 16;
                    sectorSize = 2336;
                    sectorSkip = 0;
                    break;
                }
                case CDRWIN_TRACK_TYPE_CDG:
                {
                    sectorOffset = 0;
                    sectorSize = 2352;
                    sectorSkip = 96;
                    break;
                }
                default: throw new FeatureSupportedButNotImplementedImageException("Unsupported track type");
            }

            byte[] buffer = new byte[sectorSize * length];

            imageStream = _track.Trackfile.Datafilter.GetDataForkStream();
            BinaryReader br = new BinaryReader(imageStream);
            br.BaseStream
              .Seek((long)_track.Trackfile.Offset + (long)(sectorAddress * (sectorOffset + sectorSize + sectorSkip)),
                    SeekOrigin.Begin);
            if(sectorOffset == 0 && sectorSkip == 0) buffer = br.ReadBytes((int)(sectorSize * length));
            else
            {
                for(int i = 0; i < length; i++)
                {
                    byte[] sector;
                    br.BaseStream.Seek(sectorOffset, SeekOrigin.Current);
                    sector = br.ReadBytes((int)sectorSize);
                    br.BaseStream.Seek(sectorSkip, SeekOrigin.Current);
                    Array.Copy(sector, 0, buffer, i * sectorSize, sectorSize);
                }
            }

            return buffer;
        }

        public override byte[] ReadSectorsTag(ulong sectorAddress, uint length, uint track, SectorTagType tag)
        {
            CdrWinTrack _track = new CdrWinTrack();

            _track.Sequence = 0;

            foreach(CdrWinTrack cdrwinTrack in discimage.Tracks)
            {
                if(cdrwinTrack.Sequence == track)
                {
                    _track = cdrwinTrack;
                    break;
                }
            }

            if(_track.Sequence == 0)
                throw new ArgumentOutOfRangeException(nameof(track), "Track does not exist in disc image");

            if(length > _track.Sectors)
                throw new ArgumentOutOfRangeException(nameof(length),
                                                      "Requested more sectors than present in track, won't cross tracks");

            uint sectorOffset;
            uint sectorSize;
            uint sectorSkip;

            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:
                {
                    byte[] flags = new byte[1];

                    if(_track.Tracktype != CDRWIN_TRACK_TYPE_AUDIO && _track.Tracktype != CDRWIN_TRACK_TYPE_CDG)
                        flags[0] += 0x40;

                    if(_track.FlagDcp) flags[0] += 0x20;

                    if(_track.FlagPre) flags[0] += 0x10;

                    if(_track.Flag4ch) flags[0] += 0x80;

                    return flags;
                }
                case SectorTagType.CdTrackIsrc: return Encoding.UTF8.GetBytes(_track.Isrc);
                case SectorTagType.CdTrackText:
                    throw new FeatureSupportedButNotImplementedImageException("Feature not yet implemented");
                default: throw new ArgumentException("Unsupported tag requested", nameof(tag));
            }

            switch(_track.Tracktype)
            {
                case CDRWIN_TRACK_TYPE_MODE1:
                case CDRWIN_TRACK_TYPE_MODE2_FORM1:
                case CDRWIN_TRACK_TYPE_MODE2_FORM2:
                    throw new ArgumentException("No tags in image for requested track", nameof(tag));
                case CDRWIN_TRACK_TYPE_MODE2_FORMLESS:
                case CDRWIN_TRACK_TYPE_CDI:
                {
                    switch(tag)
                    {
                        case SectorTagType.CdSectorSync:
                        case SectorTagType.CdSectorHeader:
                        case SectorTagType.CdSectorSubchannel:
                        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;
                        }
                        default: throw new ArgumentException("Unsupported tag requested", nameof(tag));
                    }

                    break;
                }
                case CDRWIN_TRACK_TYPE_AUDIO:
                    throw new ArgumentException("There are no tags on audio tracks", nameof(tag));
                case CDRWIN_TRACK_TYPE_MODE1_RAW:
                {
                    switch(tag)
                    {
                        case SectorTagType.CdSectorSync:
                        {
                            sectorOffset = 0;
                            sectorSize = 12;
                            sectorSkip = 2340;
                            break;
                        }
                        case SectorTagType.CdSectorHeader:
                        {
                            sectorOffset = 12;
                            sectorSize = 4;
                            sectorSkip = 2336;
                            break;
                        }
                        case SectorTagType.CdSectorSubchannel:
                        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;
                        }
                        default: throw new ArgumentException("Unsupported tag requested", nameof(tag));
                    }

                    break;
                }
                case CDRWIN_TRACK_TYPE_MODE2_RAW: // Requires reading sector
                case CDRWIN_TRACK_TYPE_CDI_RAW:
                    throw new FeatureSupportedButNotImplementedImageException("Feature not yet implemented");
                case CDRWIN_TRACK_TYPE_CDG:
                {
                    if(tag != SectorTagType.CdSectorSubchannel)
                        throw new ArgumentException("Unsupported tag requested for this track", nameof(tag));

                    sectorOffset = 2352;
                    sectorSize = 96;
                    sectorSkip = 0;
                    break;
                }
                default: throw new FeatureSupportedButNotImplementedImageException("Unsupported track type");
            }

            byte[] buffer = new byte[sectorSize * length];

            imageStream = _track.Trackfile.Datafilter.GetDataForkStream();
            BinaryReader br = new BinaryReader(imageStream);
            br.BaseStream
              .Seek((long)_track.Trackfile.Offset + (long)(sectorAddress * (sectorOffset + sectorSize + sectorSkip)),
                    SeekOrigin.Begin);
            if(sectorOffset == 0 && sectorSkip == 0) buffer = br.ReadBytes((int)(sectorSize * length));
            else
            {
                for(int i = 0; i < length; i++)
                {
                    byte[] sector;
                    br.BaseStream.Seek(sectorOffset, SeekOrigin.Current);
                    sector = br.ReadBytes((int)sectorSize);
                    br.BaseStream.Seek(sectorSkip, SeekOrigin.Current);
                    Array.Copy(sector, 0, buffer, i * sectorSize, sectorSize);
                }
            }

            return buffer;
        }

        public override byte[] ReadSectorLong(ulong sectorAddress)
        {
            return ReadSectorsLong(sectorAddress, 1);
        }

        public override byte[] ReadSectorLong(ulong sectorAddress, uint track)
        {
            return ReadSectorsLong(sectorAddress, 1, track);
        }

        public override byte[] ReadSectorsLong(ulong sectorAddress, uint length)
        {
            foreach(KeyValuePair<uint, ulong> kvp in offsetmap)
            {
                if(sectorAddress >= kvp.Value)
                {
                    foreach(CdrWinTrack cdrwinTrack in discimage.Tracks)
                    {
                        if(cdrwinTrack.Sequence == kvp.Key)
                        {
                            if((sectorAddress - kvp.Value) < cdrwinTrack.Sectors)
                                return ReadSectorsLong((sectorAddress - kvp.Value), length, kvp.Key);
                        }
                    }
                }
            }

            throw new ArgumentOutOfRangeException(nameof(sectorAddress), "Sector address not found");
        }

        public override byte[] ReadSectorsLong(ulong sectorAddress, uint length, uint track)
        {
            CdrWinTrack _track = new CdrWinTrack();

            _track.Sequence = 0;

            foreach(CdrWinTrack cdrwinTrack in discimage.Tracks)
            {
                if(cdrwinTrack.Sequence == track)
                {
                    _track = cdrwinTrack;
                    break;
                }
            }

            if(_track.Sequence == 0)
                throw new ArgumentOutOfRangeException(nameof(track), "Track does not exist in disc image");

            if(length > _track.Sectors)
                throw new ArgumentOutOfRangeException(nameof(length),
                                                      "Requested more sectors than present in track, won't cross tracks");

            uint sectorOffset;
            uint sectorSize;
            uint sectorSkip;

            switch(_track.Tracktype)
            {
                case CDRWIN_TRACK_TYPE_MODE1:
                case CDRWIN_TRACK_TYPE_MODE2_FORM1:
                {
                    sectorOffset = 0;
                    sectorSize = 2048;
                    sectorSkip = 0;
                    break;
                }
                case CDRWIN_TRACK_TYPE_MODE2_FORM2:
                {
                    sectorOffset = 0;
                    sectorSize = 2324;
                    sectorSkip = 0;
                    break;
                }
                case CDRWIN_TRACK_TYPE_MODE2_FORMLESS:
                case CDRWIN_TRACK_TYPE_CDI:
                {
                    sectorOffset = 0;
                    sectorSize = 2336;
                    sectorSkip = 0;
                    break;
                }
                case CDRWIN_TRACK_TYPE_MODE1_RAW:
                case CDRWIN_TRACK_TYPE_MODE2_RAW:
                case CDRWIN_TRACK_TYPE_CDI_RAW:
                case CDRWIN_TRACK_TYPE_AUDIO:
                {
                    sectorOffset = 0;
                    sectorSize = 2352;
                    sectorSkip = 0;
                    break;
                }
                case CDRWIN_TRACK_TYPE_CDG:
                {
                    sectorOffset = 0;
                    sectorSize = 2448;
                    sectorSkip = 0;
                    break;
                }
                default: throw new FeatureSupportedButNotImplementedImageException("Unsupported track type");
            }

            byte[] buffer = new byte[sectorSize * length];

            imageStream = _track.Trackfile.Datafilter.GetDataForkStream();
            BinaryReader br = new BinaryReader(imageStream);

            br.BaseStream
              .Seek((long)_track.Trackfile.Offset + (long)(sectorAddress * (sectorOffset + sectorSize + sectorSkip)),
                    SeekOrigin.Begin);

            if(sectorOffset == 0 && sectorSkip == 0) buffer = br.ReadBytes((int)(sectorSize * length));
            else
            {
                for(int i = 0; i < length; i++)
                {
                    byte[] sector;
                    br.BaseStream.Seek(sectorOffset, SeekOrigin.Current);
                    sector = br.ReadBytes((int)sectorSize);
                    br.BaseStream.Seek(sectorSkip, SeekOrigin.Current);

                    Array.Copy(sector, 0, buffer, i * sectorSize, sectorSize);
                }
            }

            return buffer;
        }

        public override string GetImageFormat()
        {
            return "CDRWin CUESheet";
        }

        public override string GetImageVersion()
        {
            return ImageInfo.ImageVersion;
        }

        public override string GetImageApplication()
        {
            return ImageInfo.ImageApplication;
        }

        public override string GetImageApplicationVersion()
        {
            return ImageInfo.ImageApplicationVersion;
        }

        public override DateTime GetImageCreationTime()
        {
            return ImageInfo.ImageCreationTime;
        }

        public override DateTime GetImageLastModificationTime()
        {
            return ImageInfo.ImageLastModificationTime;
        }

        public override string GetImageComments()
        {
            return ImageInfo.ImageComments;
        }

        public override string GetMediaSerialNumber()
        {
            return ImageInfo.MediaSerialNumber;
        }

        public override string GetMediaBarcode()
        {
            return ImageInfo.MediaBarcode;
        }

        public override MediaType GetMediaType()
        {
            return ImageInfo.MediaType;
        }

        public override List<Partition> GetPartitions()
        {
            return partitions;
        }

        public override List<Track> GetTracks()
        {
            List<Track> tracks = new List<Track>();

            ulong previousStartSector = 0;

            foreach(CdrWinTrack cdrTrack in discimage.Tracks)
            {
                Track _track = new Track();

                _track.Indexes = cdrTrack.Indexes;
                _track.TrackDescription = cdrTrack.Title;
                if(!cdrTrack.Indexes.TryGetValue(0, out _track.TrackStartSector))
                    cdrTrack.Indexes.TryGetValue(1, out _track.TrackStartSector);
                _track.TrackStartSector = previousStartSector;
                _track.TrackEndSector = _track.TrackStartSector + cdrTrack.Sectors - 1;
                _track.TrackPregap = cdrTrack.Pregap;
                _track.TrackSession = cdrTrack.Session;
                _track.TrackSequence = cdrTrack.Sequence;
                _track.TrackType = CdrWinTrackTypeToTrackType(cdrTrack.Tracktype);
                _track.TrackFile = cdrTrack.Trackfile.Datafilter.GetFilename();
                _track.TrackFilter = cdrTrack.Trackfile.Datafilter;
                _track.TrackFileOffset = cdrTrack.Trackfile.Offset;
                _track.TrackFileType = cdrTrack.Trackfile.Filetype;
                _track.TrackRawBytesPerSector = cdrTrack.Bps;
                _track.TrackBytesPerSector = CdrWinTrackTypeToCookedBytesPerSector(cdrTrack.Tracktype);
                if(cdrTrack.Bps == 2448)
                {
                    _track.TrackSubchannelFilter = cdrTrack.Trackfile.Datafilter;
                    _track.TrackSubchannelFile = cdrTrack.Trackfile.Datafilter.GetFilename();
                    _track.TrackSubchannelOffset = cdrTrack.Trackfile.Offset;
                    _track.TrackSubchannelType = TrackSubchannelType.RawInterleaved;
                }
                else _track.TrackSubchannelType = TrackSubchannelType.None;

                tracks.Add(_track);
                previousStartSector = _track.TrackEndSector + 1;
            }

            return tracks;
        }

        public override List<Track> GetSessionTracks(Session session)
        {
            if(discimage.Sessions.Contains(session)) { return GetSessionTracks(session.SessionSequence); }

            throw new ImageNotSupportedException("Session does not exist in disc image");
        }

        public override List<Track> GetSessionTracks(ushort session)
        {
            List<Track> tracks = new List<Track>();

            foreach(CdrWinTrack cdrTrack in discimage.Tracks)
            {
                if(cdrTrack.Session == session)
                {
                    Track _track = new Track();

                    _track.Indexes = cdrTrack.Indexes;
                    _track.TrackDescription = cdrTrack.Title;
                    if(!cdrTrack.Indexes.TryGetValue(0, out _track.TrackStartSector))
                        cdrTrack.Indexes.TryGetValue(1, out _track.TrackStartSector);
                    _track.TrackEndSector = _track.TrackStartSector + cdrTrack.Sectors - 1;
                    _track.TrackPregap = cdrTrack.Pregap;
                    _track.TrackSession = cdrTrack.Session;
                    _track.TrackSequence = cdrTrack.Sequence;
                    _track.TrackType = CdrWinTrackTypeToTrackType(cdrTrack.Tracktype);
                    _track.TrackFile = cdrTrack.Trackfile.Datafilter.GetFilename();
                    _track.TrackFilter = cdrTrack.Trackfile.Datafilter;
                    _track.TrackFileOffset = cdrTrack.Trackfile.Offset;
                    _track.TrackFileType = cdrTrack.Trackfile.Filetype;
                    _track.TrackRawBytesPerSector = cdrTrack.Bps;
                    _track.TrackBytesPerSector = CdrWinTrackTypeToCookedBytesPerSector(cdrTrack.Tracktype);
                    if(cdrTrack.Bps == 2448)
                    {
                        _track.TrackSubchannelFilter = cdrTrack.Trackfile.Datafilter;
                        _track.TrackSubchannelFile = cdrTrack.Trackfile.Datafilter.GetFilename();
                        _track.TrackSubchannelOffset = cdrTrack.Trackfile.Offset;
                        _track.TrackSubchannelType = TrackSubchannelType.RawInterleaved;
                    }
                    else _track.TrackSubchannelType = TrackSubchannelType.None;

                    tracks.Add(_track);
                }
            }

            return tracks;
        }

        public override List<Session> GetSessions()
        {
            return discimage.Sessions;
        }

        public override bool? VerifySector(ulong sectorAddress)
        {
            byte[] buffer = ReadSectorLong(sectorAddress);
            return Checksums.CdChecksums.CheckCdSector(buffer);
        }

        public override bool? VerifySector(ulong sectorAddress, uint track)
        {
            byte[] buffer = ReadSectorLong(sectorAddress, track);
            return Checksums.CdChecksums.CheckCdSector(buffer);
        }

        public override bool? VerifySectors(ulong sectorAddress, uint length, out List<ulong> failingLbas,
                                            out List<ulong> unknownLbas)
        {
            byte[] buffer = ReadSectorsLong(sectorAddress, length);
            int bps = (int)(buffer.Length / length);
            byte[] sector = new byte[bps];
            failingLbas = new List<ulong>();
            unknownLbas = new List<ulong>();

            for(int i = 0; i < length; i++)
            {
                Array.Copy(buffer, i * bps, sector, 0, bps);
                bool? sectorStatus = Checksums.CdChecksums.CheckCdSector(sector);

                switch(sectorStatus)
                {
                    case null:
                        unknownLbas.Add((ulong)i + sectorAddress);
                        break;
                    case false:
                        failingLbas.Add((ulong)i + sectorAddress);
                        break;
                }
            }

            if(unknownLbas.Count > 0) return null;
            if(failingLbas.Count > 0) return false;

            return true;
        }

        public override bool? VerifySectors(ulong sectorAddress, uint length, uint track, out List<ulong> failingLbas,
                                            out List<ulong> unknownLbas)
        {
            byte[] buffer = ReadSectorsLong(sectorAddress, length, track);
            int bps = (int)(buffer.Length / length);
            byte[] sector = new byte[bps];
            failingLbas = new List<ulong>();
            unknownLbas = new List<ulong>();

            for(int i = 0; i < length; i++)
            {
                Array.Copy(buffer, i * bps, sector, 0, bps);
                bool? sectorStatus = Checksums.CdChecksums.CheckCdSector(sector);

                switch(sectorStatus)
                {
                    case null:
                        unknownLbas.Add((ulong)i + sectorAddress);
                        break;
                    case false:
                        failingLbas.Add((ulong)i + sectorAddress);
                        break;
                }
            }

            if(unknownLbas.Count > 0) return null;
            if(failingLbas.Count > 0) return false;

            return true;
        }

        public override bool? VerifyMediaImage()
        {
            return null;
        }
        #endregion

        #region Private methods
        static ulong CdrWinMsftoLba(string msf)
        {
            string[] msfElements;
            ulong minute, second, frame, sectors;

            msfElements = msf.Split(':');
            minute = ulong.Parse(msfElements[0]);
            second = ulong.Parse(msfElements[1]);
            frame = ulong.Parse(msfElements[2]);

            sectors = (minute * 60 * 75) + (second * 75) + frame;

            return sectors;
        }

        static ushort CdrWinTrackTypeToBytesPerSector(string trackType)
        {
            switch(trackType)
            {
                case CDRWIN_TRACK_TYPE_MODE1:
                case CDRWIN_TRACK_TYPE_MODE2_FORM1: return 2048;
                case CDRWIN_TRACK_TYPE_MODE2_FORM2: return 2324;
                case CDRWIN_TRACK_TYPE_MODE2_FORMLESS:
                case CDRWIN_TRACK_TYPE_CDI: return 2336;
                case CDRWIN_TRACK_TYPE_AUDIO:
                case CDRWIN_TRACK_TYPE_MODE1_RAW:
                case CDRWIN_TRACK_TYPE_MODE2_RAW:
                case CDRWIN_TRACK_TYPE_CDI_RAW: return 2352;
                case CDRWIN_TRACK_TYPE_CDG: return 2448;
                default: return 0;
            }
        }

        static ushort CdrWinTrackTypeToCookedBytesPerSector(string trackType)
        {
            switch(trackType)
            {
                case CDRWIN_TRACK_TYPE_MODE1:
                case CDRWIN_TRACK_TYPE_MODE2_FORM1:
                case CDRWIN_TRACK_TYPE_MODE1_RAW: return 2048;
                case CDRWIN_TRACK_TYPE_MODE2_FORM2: return 2324;
                case CDRWIN_TRACK_TYPE_MODE2_FORMLESS:
                case CDRWIN_TRACK_TYPE_CDI:
                case CDRWIN_TRACK_TYPE_MODE2_RAW:
                case CDRWIN_TRACK_TYPE_CDI_RAW: return 2336;
                case CDRWIN_TRACK_TYPE_AUDIO: return 2352;
                case CDRWIN_TRACK_TYPE_CDG: return 2448;
                default: return 0;
            }
        }

        static TrackType CdrWinTrackTypeToTrackType(string trackType)
        {
            switch(trackType)
            {
                case CDRWIN_TRACK_TYPE_MODE1:
                case CDRWIN_TRACK_TYPE_MODE1_RAW: return TrackType.CdMode1;
                case CDRWIN_TRACK_TYPE_MODE2_FORM1: return TrackType.CdMode2Form1;
                case CDRWIN_TRACK_TYPE_MODE2_FORM2: return TrackType.CdMode2Form2;
                case CDRWIN_TRACK_TYPE_CDI_RAW:
                case CDRWIN_TRACK_TYPE_CDI:
                case CDRWIN_TRACK_TYPE_MODE2_RAW:
                case CDRWIN_TRACK_TYPE_MODE2_FORMLESS: return TrackType.CdMode2Formless;
                case CDRWIN_TRACK_TYPE_AUDIO:
                case CDRWIN_TRACK_TYPE_CDG: return TrackType.Audio;
                default: return TrackType.Data;
            }
        }

        static MediaType CdrWinIsoBusterDiscTypeToMediaType(string discType)
        {
            switch(discType)
            {
                case CDRWIN_DISK_TYPE_CD: return MediaType.CD;
                case CDRWIN_DISK_TYPE_CDRW:
                case CDRWIN_DISK_TYPE_CDMRW:
                case CDRWIN_DISK_TYPE_CDMRW2: return MediaType.CDRW;
                case CDRWIN_DISK_TYPE_DVD: return MediaType.DVDROM;
                case CDRWIN_DISK_TYPE_DVDPRW:
                case CDRWIN_DISK_TYPE_DVDPMRW:
                case CDRWIN_DISK_TYPE_DVDPMRW2: return MediaType.DVDPRW;
                case CDRWIN_DISK_TYPE_DVDPRWDL:
                case CDRWIN_DISK_TYPE_DVDPMRWDL:
                case CDRWIN_DISK_TYPE_DVDPMRWDL2: return MediaType.DVDPRWDL;
                case CDRWIN_DISK_TYPE_DVDPR:
                case CDRWIN_DISK_TYPE_DVDPVR: return MediaType.DVDPR;
                case CDRWIN_DISK_TYPE_DVDPRDL: return MediaType.DVDPRDL;
                case CDRWIN_DISK_TYPE_DVDRAM: return MediaType.DVDRAM;
                case CDRWIN_DISK_TYPE_DVDVR:
                case CDRWIN_DISK_TYPE_DVDR: return MediaType.DVDR;
                case CDRWIN_DISK_TYPE_DVDRDL: return MediaType.DVDRDL;
                case CDRWIN_DISK_TYPE_DVDRW:
                case CDRWIN_DISK_TYPE_DVDRWDL:
                case CDRWIN_DISK_TYPE_DVDRW2: return MediaType.DVDRW;
                case CDRWIN_DISK_TYPE_HDDVD: return MediaType.HDDVDROM;
                case CDRWIN_DISK_TYPE_HDDVDRAM: return MediaType.HDDVDRAM;
                case CDRWIN_DISK_TYPE_HDDVDR:
                case CDRWIN_DISK_TYPE_HDDVDRDL: return MediaType.HDDVDR;
                case CDRWIN_DISK_TYPE_HDDVDRW:
                case CDRWIN_DISK_TYPE_HDDVDRWDL: return MediaType.HDDVDRW;
                case CDRWIN_DISK_TYPE_BD: return MediaType.BDROM;
                case CDRWIN_DISK_TYPE_BDR:
                case CDRWIN_DISK_TYPE_BDRDL: return MediaType.BDR;
                case CDRWIN_DISK_TYPE_BDRE:
                case CDRWIN_DISK_TYPE_BDREDL: return MediaType.BDRE;
                default: return MediaType.Unknown;
            }
        }
        #endregion

        #region Unsupported features
        public override int GetMediaSequence()
        {
            return ImageInfo.MediaSequence;
        }

        public override int GetLastDiskSequence()
        {
            return ImageInfo.LastMediaSequence;
        }

        public override string GetDriveManufacturer()
        {
            return ImageInfo.DriveManufacturer;
        }

        public override string GetDriveModel()
        {
            return ImageInfo.DriveModel;
        }

        public override string GetDriveSerialNumber()
        {
            return ImageInfo.DriveSerialNumber;
        }

        public override string GetMediaPartNumber()
        {
            return ImageInfo.MediaPartNumber;
        }

        public override string GetMediaManufacturer()
        {
            return ImageInfo.MediaManufacturer;
        }

        public override string GetMediaModel()
        {
            return ImageInfo.MediaModel;
        }

        public override string GetImageName()
        {
            return ImageInfo.ImageName;
        }

        public override string GetImageCreator()
        {
            return ImageInfo.ImageCreator;
        }
        #endregion
    }
}