/// <exception cref="InvalidOperationException">first track of <see cref="TOCRaw"/> is not <c>1</c></exception>
public void Run()
{
var dsr = new DiscSectorReader(IN_Disc)
{
Policy = { DeterministicClearBuffer = false }
};
Result = new DiscStructure();
var session = new DiscStructure.Session();
Result.Sessions.Add(null); //placeholder session for reindexing
Result.Sessions.Add(session);
session.Number = 1;
if (TOCRaw.FirstRecordedTrackNumber != 1)
{
throw new InvalidOperationException($"Unsupported: {nameof(TOCRaw.FirstRecordedTrackNumber)} != 1");
}
//add a lead-in track
session.Tracks.Add(new DiscStructure.Track
{
Number = 0,
Control = EControlQ.None, //we'll set this later
LBA = -new Timestamp(99, 99, 99).Sector //obvious garbage
});
int ntracks = TOCRaw.LastRecordedTrackNumber - TOCRaw.FirstRecordedTrackNumber + 1;
for (int i = 0; i < ntracks; i++)
{
var item = TOCRaw.TOCItems[i + 1];
var track = new DiscStructure.Track
{
Number = i + 1,
Control = item.Control,
LBA = item.LBA
};
session.Tracks.Add(track);
if (!item.IsData)
{
track.Mode = 0;
}
else
{
//determine the mode by a hardcoded heuristic: check mode of first sector
track.Mode = dsr.ReadLBA_Mode(track.LBA);
}
//determine track length according to... how? It isn't clear.
//Let's not do this until it's needed.
//if (i == ntracks - 1)
// track.Length = TOCRaw.LeadoutLBA.Sector - track.LBA;
//else track.Length = (TOCRaw.TOCItems[i + 2].LBATimestamp.Sector - track.LBA);
}
//add lead-out track
session.Tracks.Add(new DiscStructure.Track
{
Number = 0xA0, //right?
//kind of a guess, but not completely
Control = session.Tracks[session.Tracks.Count - 1].Control,
Mode = session.Tracks[session.Tracks.Count - 1].Mode,
LBA = TOCRaw.LeadoutLBA
});
//link track list
for (int i = 0; i < session.Tracks.Count - 1; i++)
{
session.Tracks[i].NextTrack = session.Tracks[i + 1];
}
//fix lead-in track type
//guesses:
session.Tracks[0].Control = session.Tracks[1].Control;
session.Tracks[0].Mode = session.Tracks[1].Mode;
}
void FromCueInternal(Cue cue, string cueDir, CueBinPrefs prefs)
{
//TODO - add cue directory to CueBinPrefs???? could make things cleaner...
Structure = new DiscStructure();
var session = new DiscStructure.Session {
num = 1
};
Structure.Sessions.Add(session);
var pregap_sector = new Sector_Zero();
int curr_track = 1;
foreach (var cue_file in cue.Files)
{
//structural validation
if (cue_file.Tracks.Count < 1)
{
throw new Cue.CueBrokenException("`You must specify at least one track per file.`");
}
string blobPath = Path.Combine(cueDir, cue_file.Path);
if (CueFileResolver.ContainsKey(cue_file.Path))
{
blobPath = CueFileResolver[cue_file.Path];
}
int blob_sectorsize = Cue.BINSectorSizeForTrackType(cue_file.Tracks[0].TrackType);
int blob_length_aba;
long blob_length_bytes;
IBlob cue_blob;
//try any way we can to acquire a file
if (!File.Exists(blobPath) && prefs.ExtensionAware)
{
blobPath = FindAlternateExtensionFile(blobPath, prefs.CaseSensitive, cueDir);
}
if (!File.Exists(blobPath))
{
throw new DiscReferenceException(blobPath, "");
}
//some simple rules to mutate the file type if we received something fishy
string blobPathExt = Path.GetExtension(blobPath).ToLower();
if (blobPathExt == ".ape")
{
cue_file.FileType = Cue.CueFileType.Wave;
}
if (blobPathExt == ".mp3")
{
cue_file.FileType = Cue.CueFileType.Wave;
}
if (blobPathExt == ".mpc")
{
cue_file.FileType = Cue.CueFileType.Wave;
}
if (blobPathExt == ".flac")
{
cue_file.FileType = Cue.CueFileType.Wave;
}
if (blobPathExt == ".ecm")
{
cue_file.FileType = Cue.CueFileType.ECM;
}
if (cue_file.FileType == Cue.CueFileType.Binary || cue_file.FileType == Cue.CueFileType.Unspecified)
{
//make a blob for the file
Blob_RawFile blob = new Blob_RawFile {
PhysicalPath = blobPath
};
Blobs.Add(blob);
blob_length_aba = (int)(blob.Length / blob_sectorsize);
blob_length_bytes = blob.Length;
cue_blob = blob;
}
else if (cue_file.FileType == Cue.CueFileType.ECM)
{
if (!Blob_ECM.IsECM(blobPath))
{
throw new DiscReferenceException(blobPath, "an ECM file was specified or detected, but it isn't a valid ECM file. You've got issues. Consult your iso vendor.");
}
Blob_ECM blob = new Blob_ECM();
Blobs.Add(blob);
blob.Parse(blobPath);
cue_blob = blob;
blob_length_aba = (int)(blob.Length / blob_sectorsize);
blob_length_bytes = blob.Length;
}
else if (cue_file.FileType == Cue.CueFileType.Wave)
{
Blob_WaveFile blob = new Blob_WaveFile();
Blobs.Add(blob);
try
{
//check whether we can load the wav directly
bool loaded = false;
if (File.Exists(blobPath) && Path.GetExtension(blobPath).ToUpper() == ".WAV")
{
try
{
blob.Load(blobPath);
loaded = true;
}
catch
{
}
}
//if that didnt work or wasnt possible, try loading it through ffmpeg
if (!loaded)
{
FFMpeg ffmpeg = new FFMpeg();
if (!ffmpeg.QueryServiceAvailable())
{
throw new DiscReferenceException(blobPath, "No decoding service was available (make sure ffmpeg.exe is available. even though this may be a wav, ffmpeg is used to load oddly formatted wave files. If you object to this, please send us a note and we'll see what we can do. It shouldn't be too hard.)");
}
AudioDecoder dec = new AudioDecoder();
byte[] buf = dec.AcquireWaveData(blobPath);
blob.Load(new MemoryStream(buf));
WasSlowLoad = true;
}
}
catch (Exception ex)
{
throw new DiscReferenceException(blobPath, ex);
}
blob_length_aba = (int)(blob.Length / blob_sectorsize);
blob_length_bytes = blob.Length;
cue_blob = blob;
}
else
{
throw new Exception("Internal error - Unhandled cue blob type");
}
//TODO - make CueTimestamp better, and also make it a struct, and also just make it DiscTimestamp
//start timekeeping for the blob. every time we hit an index, this will advance
int blob_timestamp = 0;
//because we can have different size sectors in a blob, we need to keep a file cursor within the blob
long blob_cursor = 0;
//the aba that this cue blob starts on
int blob_disc_aba_start = Sectors.Count;
//this is a bit dodgy.. lets fixup the indices so we have something for index 0
//TODO - I WISH WE DIDNT HAVE TO DO THIS. WE SHOULDNT PAY SO MUCH ATTENTION TO THE INTEGRITY OF THE INDEXES
Timestamp blob_ts = new Timestamp(0);
for (int t = 0; t < cue_file.Tracks.Count; t++)
{
var cue_track = cue_file.Tracks[t];
if (!cue_track.Indexes.ContainsKey(1))
{
throw new Cue.CueBrokenException("Track was missing an index 01");
}
for (int i = 0; i <= 99; i++)
{
if (cue_track.Indexes.ContainsKey(i))
{
blob_ts = cue_track.Indexes[i].Timestamp;
}
else if (i == 0)
{
var cti = new Cue.CueTrackIndex(0);
cue_track.Indexes[0] = cti;
cti.Timestamp = blob_ts;
}
}
}
//validate that the first index in the file is 00:00:00
//"The first index of a file must start at 00:00:00"
//zero 20-dec-2014 - NOTE - index 0 is OK. we've seen files that 'start' at non-zero but thats only with index 1 -- an index 0 was explicitly listed at time 0
if (cue_file.Tracks[0].Indexes[0].Timestamp.Sector != 0)
{
throw new Cue.CueBrokenException("`The first index of a blob must start at 00:00:00.`");
}
//for each track within the file:
for (int t = 0; t < cue_file.Tracks.Count; t++)
{
var cue_track = cue_file.Tracks[t];
//record the disc ABA that this track started on
int track_disc_aba_start = Sectors.Count;
//record the pregap location. it will default to the start of the track unless we supplied a pregap command
int track_disc_pregap_aba = track_disc_aba_start;
int blob_track_start = blob_timestamp;
//once upon a time we had a check here to prevent a single blob from containing variant sector sizes. but we support that now.
//check integrity of track sequence and setup data structures
//TODO - check for skipped tracks in cue parser instead
if (cue_track.TrackNum != curr_track)
{
throw new Cue.CueBrokenException("Found a cue with skipped tracks");
}
var toc_track = new DiscStructure.Track();
session.Tracks.Add(toc_track);
toc_track.Number = curr_track;
toc_track.TrackType = cue_track.TrackType;
toc_track.ADR = 1; //safe assumption. CUE can't store this.
//choose a Control value based on track type and other flags from cue
//TODO - this might need to be controlled by cue loading prefs
toc_track.Control = cue_track.Control;
if (toc_track.TrackType == ETrackType.Audio)
{
toc_track.Control |= EControlQ.StereoNoPreEmph;
}
else
{
toc_track.Control |= EControlQ.DataUninterrupted;
}
if (curr_track == 1)
{
if (cue_track.PreGap.Sector != 0)
{
throw new InvalidOperationException("not supported (yet): cue files with track 1 pregaps");
}
//but now we add one anyway, because every existing cue+bin seems to implicitly specify this
cue_track.PreGap = new Timestamp(150);
}
//check whether a pregap is requested.
//this causes empty sectors to get generated without consuming data from the blob
if (cue_track.PreGap.Sector > 0)
{
for (int i = 0; i < cue_track.PreGap.Sector; i++)
{
Sectors.Add(new SectorEntry(pregap_sector));
}
}
//look ahead to the next track's index 1 so we can see how long this track's last index is
//or, for the last track, use the length of the file
int track_length_aba;
if (t == cue_file.Tracks.Count - 1)
{
track_length_aba = blob_length_aba - blob_timestamp;
}
else
{
track_length_aba = cue_file.Tracks[t + 1].Indexes[1].Timestamp.Sector - blob_timestamp;
}
//toc_track.length_aba = track_length_aba; //xxx
//find out how many indexes we have
int num_indexes = 0;
for (num_indexes = 0; num_indexes <= 99; num_indexes++)
{
if (!cue_track.Indexes.ContainsKey(num_indexes))
{
break;
}
}
//for each index, calculate length of index and then emit it
for (int index = 0; index < num_indexes; index++)
{
bool is_last_index = index == num_indexes - 1;
//install index into hierarchy
var toc_index = new DiscStructure.Index {
Number = index
};
toc_track.Indexes.Add(toc_index);
if (index == 0)
{
//zero 18-dec-2014 - uhhhh cant make sense of this.
//toc_index.aba = track_disc_pregap_aba - (cue_track.Indexes[1].Timestamp.Sector - cue_track.Indexes[0].Timestamp.Sector);
toc_index.aba = track_disc_pregap_aba;
}
else
{
toc_index.aba = Sectors.Count;
}
//calculate length of the index
//if it is the last index then we use our calculation from before, otherwise we check the next index
int index_length_aba;
if (is_last_index)
{
index_length_aba = track_length_aba - (blob_timestamp - blob_track_start);
}
else
{
index_length_aba = cue_track.Indexes[index + 1].Timestamp.Sector - blob_timestamp;
}
//emit sectors
for (int aba = 0; aba < index_length_aba; aba++)
{
bool is_last_aba_in_index = (aba == index_length_aba - 1);
bool is_last_aba_in_track = is_last_aba_in_index && is_last_index;
switch (cue_track.TrackType)
{
case ETrackType.Audio: //all 2352 bytes are present
case ETrackType.Mode1_2352: //2352 bytes are present, containing 2048 bytes of user data as well as ECM
case ETrackType.Mode2_2352: //2352 bytes are present, containing the entirety of a mode2 sector (could be form0,1,2)
{
//these cases are all 2352 bytes
//in all these cases, either no ECM is present or ECM is provided.
//so we just emit a Sector_Raw
Sector_RawBlob sector_rawblob = new Sector_RawBlob
{
Blob = cue_blob,
Offset = blob_cursor
};
blob_cursor += 2352;
Sector_Mode1_or_Mode2_2352 sector_raw;
if (cue_track.TrackType == ETrackType.Mode1_2352)
{
sector_raw = new Sector_Mode1_2352();
}
else if (cue_track.TrackType == ETrackType.Audio)
{
sector_raw = new Sector_Mode1_2352(); //TODO should probably make a new sector adapter which errors if 2048B are requested
}
else if (cue_track.TrackType == ETrackType.Mode2_2352)
{
sector_raw = new Sector_Mode2_2352();
}
else
{
throw new InvalidOperationException();
}
sector_raw.BaseSector = sector_rawblob;
Sectors.Add(new SectorEntry(sector_raw));
break;
}
case ETrackType.Mode1_2048:
//2048 bytes are present. ECM needs to be generated to create a full sector
{
//ECM needs to know the sector number so we have to record that here
int curr_disc_aba = Sectors.Count;
var sector_2048 = new Sector_Mode1_2048(curr_disc_aba + 150)
{
Blob = new ECMCacheBlob(cue_blob),
Offset = blob_cursor
};
blob_cursor += 2048;
Sectors.Add(new SectorEntry(sector_2048));
break;
}
} //switch(TrackType)
//we've emitted an ABA, so consume it from the blob
blob_timestamp++;
} //aba emit loop
} //index loop
//check whether a postgap is requested. if it is, we need to generate silent sectors
for (int i = 0; i < cue_track.PostGap.Sector; i++)
{
Sectors.Add(new SectorEntry(pregap_sector));
}
//we're done with the track now.
//record its length:
toc_track.LengthInSectors = Sectors.Count - toc_track.Indexes[1].aba;
curr_track++;
//if we ran off the end of the blob, pad it with zeroes, I guess
if (blob_cursor > blob_length_bytes)
{
//mutate the blob to an encapsulating Blob_ZeroPadAdapter
Blobs[Blobs.Count - 1] = new Blob_ZeroPadAdapter(Blobs[Blobs.Count - 1], blob_length_bytes, blob_cursor - blob_length_bytes);
}
} //track loop
} //file loop
//finally, analyze the length of the sessions and the entire disc by summing the lengths of the tracks
//this is a little more complex than it looks, because the length of a thing is not determined by summing it
//but rather by the difference in abas between start and end
//EDIT - or is the above nonsense? it should be the amount of data present, full stop.
Structure.LengthInSectors = 0;
foreach (var toc_session in Structure.Sessions)
{
var firstTrack = toc_session.Tracks[0];
//track 0, index 0 is actually -150. but cue sheets will never say that
//firstTrack.Indexes[0].aba -= 150;
var lastTrack = toc_session.Tracks[toc_session.Tracks.Count - 1];
session.length_aba = lastTrack.Indexes[1].aba + lastTrack.LengthInSectors - firstTrack.Indexes[0].aba;
Structure.LengthInSectors += toc_session.length_aba;
}
}
public void Run()
{
var dsr = new DiscSectorReader(IN_Disc);
dsr.Policy.DeterministicClearBuffer = false;
Result = new DiscStructure();
var session = new DiscStructure.Session();
Result.Sessions.Add(null); //placeholder session for reindexing
Result.Sessions.Add(session);
session.Number = 1;
if (TOCRaw.FirstRecordedTrackNumber != 1)
throw new InvalidOperationException("Unsupported: FirstRecordedTrackNumber != 1");
//add a lead-in track
session.Tracks.Add(new DiscStructure.Track()
{
Number = 0,
Control = EControlQ.None, //we'll set this later
LBA = -new Timestamp(99,99,99).Sector //obvious garbage
});
int ntracks = TOCRaw.LastRecordedTrackNumber - TOCRaw.FirstRecordedTrackNumber + 1;
for (int i = 0; i < ntracks; i++)
{
var item = TOCRaw.TOCItems[i + 1];
var track = new DiscStructure.Track()
{
Number = i + 1,
Control = item.Control,
LBA = item.LBA
};
session.Tracks.Add(track);
if (!item.IsData)
track.Mode = 0;
else
{
//determine the mode by a hardcoded heuristic: check mode of first sector
track.Mode = dsr.ReadLBA_Mode(track.LBA);
}
//determine track length according to... how? It isn't clear.
//Let's not do this until it's needed.
//if (i == ntracks - 1)
// track.Length = TOCRaw.LeadoutLBA.Sector - track.LBA;
//else track.Length = (TOCRaw.TOCItems[i + 2].LBATimestamp.Sector - track.LBA);
}
//add lead-out track
session.Tracks.Add(new DiscStructure.Track()
{
Number = 0xA0, //right?
//kind of a guess, but not completely
Control = session.Tracks[session.Tracks.Count -1 ].Control,
Mode = session.Tracks[session.Tracks.Count - 1].Mode,
LBA = TOCRaw.LeadoutLBA
});
//link track list
for (int i = 0; i < session.Tracks.Count - 1; i++)
{
session.Tracks[i].NextTrack = session.Tracks[i + 1];
}
//fix lead-in track type
//guesses:
session.Tracks[0].Control = session.Tracks[1].Control;
session.Tracks[0].Mode = session.Tracks[1].Mode;
}
void FromCueInternal(Cue cue, string cueDir, CueBinPrefs prefs)
{
//TODO - add cue directory to CueBinPrefs???? could make things cleaner...
Structure = new DiscStructure();
var session = new DiscStructure.Session {num = 1};
Structure.Sessions.Add(session);
var pregap_sector = new Sector_Zero();
int curr_track = 1;
foreach (var cue_file in cue.Files)
{
//structural validation
if (cue_file.Tracks.Count < 1) throw new Cue.CueBrokenException("`You must specify at least one track per file.`");
string blobPath = Path.Combine(cueDir, cue_file.Path);
if (CueFileResolver.ContainsKey(cue_file.Path))
blobPath = CueFileResolver[cue_file.Path];
int blob_sectorsize = Cue.BINSectorSizeForTrackType(cue_file.Tracks[0].TrackType);
int blob_length_aba;
long blob_length_bytes;
IBlob cue_blob;
//try any way we can to acquire a file
if (!File.Exists(blobPath) && prefs.ExtensionAware)
{
blobPath = FindAlternateExtensionFile(blobPath, prefs.CaseSensitive, cueDir);
}
if (!File.Exists(blobPath))
throw new DiscReferenceException(blobPath, "");
//some simple rules to mutate the file type if we received something fishy
string blobPathExt = Path.GetExtension(blobPath).ToLower();
if (blobPathExt == ".ape") cue_file.FileType = Cue.CueFileType.Wave;
if (blobPathExt == ".mp3") cue_file.FileType = Cue.CueFileType.Wave;
if (blobPathExt == ".mpc") cue_file.FileType = Cue.CueFileType.Wave;
if (blobPathExt == ".flac") cue_file.FileType = Cue.CueFileType.Wave;
if (blobPathExt == ".ecm") cue_file.FileType = Cue.CueFileType.ECM;
if (cue_file.FileType == Cue.CueFileType.Binary || cue_file.FileType == Cue.CueFileType.Unspecified)
{
//make a blob for the file
Blob_RawFile blob = new Blob_RawFile {PhysicalPath = blobPath};
Blobs.Add(blob);
blob_length_aba = (int)(blob.Length / blob_sectorsize);
blob_length_bytes = blob.Length;
cue_blob = blob;
}
else if (cue_file.FileType == Cue.CueFileType.ECM)
{
if (!Blob_ECM.IsECM(blobPath))
{
throw new DiscReferenceException(blobPath, "an ECM file was specified or detected, but it isn't a valid ECM file. You've got issues. Consult your iso vendor.");
}
Blob_ECM blob = new Blob_ECM();
Blobs.Add(blob);
blob.Parse(blobPath);
cue_blob = blob;
blob_length_aba = (int)(blob.Length / blob_sectorsize);
blob_length_bytes = blob.Length;
}
else if (cue_file.FileType == Cue.CueFileType.Wave)
{
Blob_WaveFile blob = new Blob_WaveFile();
Blobs.Add(blob);
try
{
//check whether we can load the wav directly
bool loaded = false;
if (File.Exists(blobPath) && Path.GetExtension(blobPath).ToUpper() == ".WAV")
{
try
{
blob.Load(blobPath);
loaded = true;
}
catch
{
}
}
//if that didnt work or wasnt possible, try loading it through ffmpeg
if (!loaded)
{
FFMpeg ffmpeg = new FFMpeg();
if (!ffmpeg.QueryServiceAvailable())
{
throw new DiscReferenceException(blobPath, "No decoding service was available (make sure ffmpeg.exe is available. even though this may be a wav, ffmpeg is used to load oddly formatted wave files. If you object to this, please send us a note and we'll see what we can do. It shouldn't be too hard.)");
}
AudioDecoder dec = new AudioDecoder();
byte[] buf = dec.AcquireWaveData(blobPath);
blob.Load(new MemoryStream(buf));
WasSlowLoad = true;
}
}
catch (Exception ex)
{
throw new DiscReferenceException(blobPath, ex);
}
blob_length_aba = (int)(blob.Length / blob_sectorsize);
blob_length_bytes = blob.Length;
cue_blob = blob;
}
else throw new Exception("Internal error - Unhandled cue blob type");
//TODO - make CueTimestamp better, and also make it a struct, and also just make it DiscTimestamp
//start timekeeping for the blob. every time we hit an index, this will advance
int blob_timestamp = 0;
//because we can have different size sectors in a blob, we need to keep a file cursor within the blob
long blob_cursor = 0;
//the aba that this cue blob starts on
int blob_disc_aba_start = Sectors.Count;
//this is a bit dodgy.. lets fixup the indices so we have something for index 0
//TODO - I WISH WE DIDNT HAVE TO DO THIS. WE SHOULDNT PAY SO MUCH ATTENTION TO THE INTEGRITY OF THE INDEXES
Timestamp blob_ts = new Timestamp(0);
for (int t = 0; t < cue_file.Tracks.Count; t++)
{
var cue_track = cue_file.Tracks[t];
if (!cue_track.Indexes.ContainsKey(1))
throw new Cue.CueBrokenException("Track was missing an index 01");
for (int i = 0; i <= 99; i++)
{
if (cue_track.Indexes.ContainsKey(i))
{
blob_ts = cue_track.Indexes[i].Timestamp;
}
else if (i == 0)
{
var cti = new Cue.CueTrackIndex(0);
cue_track.Indexes[0] = cti;
cti.Timestamp = blob_ts;
}
}
}
//validate that the first index in the file is 00:00:00
//"The first index of a file must start at 00:00:00"
//zero 20-dec-2014 - NOTE - index 0 is OK. we've seen files that 'start' at non-zero but thats only with index 1 -- an index 0 was explicitly listed at time 0
if (cue_file.Tracks[0].Indexes[0].Timestamp.Sector != 0) throw new Cue.CueBrokenException("`The first index of a blob must start at 00:00:00.`");
//for each track within the file:
for (int t = 0; t < cue_file.Tracks.Count; t++)
{
var cue_track = cue_file.Tracks[t];
//record the disc ABA that this track started on
int track_disc_aba_start = Sectors.Count;
//record the pregap location. it will default to the start of the track unless we supplied a pregap command
int track_disc_pregap_aba = track_disc_aba_start;
int blob_track_start = blob_timestamp;
//once upon a time we had a check here to prevent a single blob from containing variant sector sizes. but we support that now.
//check integrity of track sequence and setup data structures
//TODO - check for skipped tracks in cue parser instead
if (cue_track.TrackNum != curr_track) throw new Cue.CueBrokenException("Found a cue with skipped tracks");
var toc_track = new DiscStructure.Track();
session.Tracks.Add(toc_track);
toc_track.Number = curr_track;
toc_track.TrackType = cue_track.TrackType;
toc_track.ADR = 1; //safe assumption. CUE can't store this.
//choose a Control value based on track type and other flags from cue
//TODO - this might need to be controlled by cue loading prefs
toc_track.Control = cue_track.Control;
if (toc_track.TrackType == ETrackType.Audio)
toc_track.Control |= EControlQ.StereoNoPreEmph;
else toc_track.Control |= EControlQ.DataUninterrupted;
if (curr_track == 1)
{
if (cue_track.PreGap.Sector != 0)
throw new InvalidOperationException("not supported (yet): cue files with track 1 pregaps");
//but now we add one anyway, because every existing cue+bin seems to implicitly specify this
cue_track.PreGap = new Timestamp(150);
}
//check whether a pregap is requested.
//this causes empty sectors to get generated without consuming data from the blob
if (cue_track.PreGap.Sector > 0)
{
for (int i = 0; i < cue_track.PreGap.Sector; i++)
{
Sectors.Add(new SectorEntry(pregap_sector));
}
}
//look ahead to the next track's index 1 so we can see how long this track's last index is
//or, for the last track, use the length of the file
int track_length_aba;
if (t == cue_file.Tracks.Count - 1)
track_length_aba = blob_length_aba - blob_timestamp;
else track_length_aba = cue_file.Tracks[t + 1].Indexes[1].Timestamp.Sector - blob_timestamp;
//toc_track.length_aba = track_length_aba; //xxx
//find out how many indexes we have
int num_indexes = 0;
for (num_indexes = 0; num_indexes <= 99; num_indexes++)
if (!cue_track.Indexes.ContainsKey(num_indexes)) break;
//for each index, calculate length of index and then emit it
for (int index = 0; index < num_indexes; index++)
{
bool is_last_index = index == num_indexes - 1;
//install index into hierarchy
var toc_index = new DiscStructure.Index {Number = index};
toc_track.Indexes.Add(toc_index);
if (index == 0)
{
//zero 18-dec-2014 - uhhhh cant make sense of this.
//toc_index.aba = track_disc_pregap_aba - (cue_track.Indexes[1].Timestamp.Sector - cue_track.Indexes[0].Timestamp.Sector);
toc_index.aba = track_disc_pregap_aba;
}
else toc_index.aba = Sectors.Count;
//calculate length of the index
//if it is the last index then we use our calculation from before, otherwise we check the next index
int index_length_aba;
if (is_last_index)
index_length_aba = track_length_aba - (blob_timestamp - blob_track_start);
else index_length_aba = cue_track.Indexes[index + 1].Timestamp.Sector - blob_timestamp;
//emit sectors
for (int aba = 0; aba < index_length_aba; aba++)
{
bool is_last_aba_in_index = (aba == index_length_aba - 1);
bool is_last_aba_in_track = is_last_aba_in_index && is_last_index;
switch (cue_track.TrackType)
{
case ETrackType.Audio: //all 2352 bytes are present
case ETrackType.Mode1_2352: //2352 bytes are present, containing 2048 bytes of user data as well as ECM
case ETrackType.Mode2_2352: //2352 bytes are present, containing the entirety of a mode2 sector (could be form0,1,2)
{
//these cases are all 2352 bytes
//in all these cases, either no ECM is present or ECM is provided.
//so we just emit a Sector_Raw
Sector_RawBlob sector_rawblob = new Sector_RawBlob
{
Blob = cue_blob,
Offset = blob_cursor
};
blob_cursor += 2352;
Sector_Mode1_or_Mode2_2352 sector_raw;
if(cue_track.TrackType == ETrackType.Mode1_2352)
sector_raw = new Sector_Mode1_2352();
else if (cue_track.TrackType == ETrackType.Audio)
sector_raw = new Sector_Mode1_2352(); //TODO should probably make a new sector adapter which errors if 2048B are requested
else if (cue_track.TrackType == ETrackType.Mode2_2352)
sector_raw = new Sector_Mode2_2352();
else throw new InvalidOperationException();
sector_raw.BaseSector = sector_rawblob;
Sectors.Add(new SectorEntry(sector_raw));
break;
}
case ETrackType.Mode1_2048:
//2048 bytes are present. ECM needs to be generated to create a full sector
{
//ECM needs to know the sector number so we have to record that here
int curr_disc_aba = Sectors.Count;
var sector_2048 = new Sector_Mode1_2048(curr_disc_aba + 150)
{
Blob = new ECMCacheBlob(cue_blob),
Offset = blob_cursor
};
blob_cursor += 2048;
Sectors.Add(new SectorEntry(sector_2048));
break;
}
} //switch(TrackType)
//we've emitted an ABA, so consume it from the blob
blob_timestamp++;
} //aba emit loop
} //index loop
//check whether a postgap is requested. if it is, we need to generate silent sectors
for (int i = 0; i < cue_track.PostGap.Sector; i++)
{
Sectors.Add(new SectorEntry(pregap_sector));
}
//we're done with the track now.
//record its length:
toc_track.LengthInSectors = Sectors.Count - toc_track.Indexes[1].aba;
curr_track++;
//if we ran off the end of the blob, pad it with zeroes, I guess
if (blob_cursor > blob_length_bytes)
{
//mutate the blob to an encapsulating Blob_ZeroPadAdapter
Blobs[Blobs.Count - 1] = new Blob_ZeroPadAdapter(Blobs[Blobs.Count - 1], blob_length_bytes, blob_cursor - blob_length_bytes);
}
} //track loop
} //file loop
//finally, analyze the length of the sessions and the entire disc by summing the lengths of the tracks
//this is a little more complex than it looks, because the length of a thing is not determined by summing it
//but rather by the difference in abas between start and end
//EDIT - or is the above nonsense? it should be the amount of data present, full stop.
Structure.LengthInSectors = 0;
foreach (var toc_session in Structure.Sessions)
{
var firstTrack = toc_session.Tracks[0];
//track 0, index 0 is actually -150. but cue sheets will never say that
//firstTrack.Indexes[0].aba -= 150;
var lastTrack = toc_session.Tracks[toc_session.Tracks.Count - 1];
session.length_aba = lastTrack.Indexes[1].aba + lastTrack.LengthInSectors - firstTrack.Indexes[0].aba;
Structure.LengthInSectors += toc_session.length_aba;
}
}