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neaten up and improve FARC loading and saving

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This commit is contained in:
Michael Becker 2020-05-04 02:09:35 -04:00
parent bb0f3bcf26
commit 36f13363aa
No known key found for this signature in database
GPG Key ID: 506F54899E2BFED7
1 changed files with 55 additions and 84 deletions
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139
Plugins/UniversalEditor.Plugins.Sega/DataFormats/FileSystem/Sega/FARC/FARCDataFormat.cs
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@ -95,95 +95,65 @@ namespace UniversalEditor.Plugins.Sega.DataFormats.FileSystem.Sega.FARC
string FArC = reader.ReadFixedLengthString(4);
int directorySize = reader.ReadInt32();
int dummy = reader.ReadInt32();
uint flags = reader.ReadUInt32();
switch (FArC)
// so there is no way to determine whether the file header is encrypted or not by looking at unencrypted flags...
if (FArC == "FArC" || FArC == "FArc" || FArC == "FARC")
{
case "FArC":
Compressed = (FArC == "FArC" || FArC == "FARC");
Encrypted = (FArC == "FARC");
if (Encrypted)
{
Compressed = true;
Encrypted = false;
while (reader.Accessor.Position < directorySize)
{
string FileName = reader.ReadNullTerminatedString();
int offset = reader.ReadInt32();
int compressedSize = reader.ReadInt32();
int decompressedSize = reader.ReadInt32();
File file = fsom.AddFile(FileName);
if (decompressedSize == 0)
{
decompressedSize = compressedSize;
}
file.Size = decompressedSize;
file.Properties.Add("reader", reader);
file.Properties.Add("offset", offset);
file.Properties.Add("CompressedSize", compressedSize);
file.Properties.Add("DecompressedSize", compressedSize);
file.DataRequest += file_DataRequest;
}
break;
}
case "FArc":
{
Compressed = false;
Encrypted = false;
// uncompressed, unencrypted
while (reader.Accessor.Position - 12 < directorySize - 4)
{
string FileName = reader.ReadNullTerminatedString();
int offset = reader.ReadInt32();
int length = reader.ReadInt32();
File file = fsom.AddFile(FileName);
file.Size = length;
file.Properties.Add("reader", reader);
file.Properties.Add("offset", offset);
file.Properties.Add("length", length);
file.DataRequest += file_DataRequest;
}
break;
}
case "FARC":
{
Compressed = true;
Encrypted = true;
// Encrypted, compressed
uint flag0 = reader.ReadUInt32();
uint flag1 = reader.ReadUInt32();
uint flag2 = reader.ReadUInt32();
uint flag3 = reader.ReadUInt32();
while (reader.Accessor.Position < directorySize + 8)
{
string FileName = reader.ReadNullTerminatedString();
int offset = reader.ReadInt32();
int compressedSize = reader.ReadInt32();
int decompressedSize = reader.ReadInt32();
File file = fsom.AddFile(FileName);
file.Size = compressedSize;
file.Properties.Add("reader", reader);
file.Properties.Add("compressedLength", compressedSize);
file.Properties.Add("decompressedLength", decompressedSize);
file.Properties.Add("offset", offset);
file.DataRequest += file_DataRequest;
}
break;
uint flag4 = reader.ReadUInt32();
}
default:
while (reader.Accessor.Position < directorySize)
{
throw new InvalidDataFormatException("Unrecognized FARC signature: \"" + FArC + "\"");
string FileName = reader.ReadNullTerminatedString();
int offset = reader.ReadInt32();
int compressedSize = reader.ReadInt32();
int decompressedSize = compressedSize;
if (Compressed)
{
decompressedSize = reader.ReadInt32();
}
if (Encrypted)
{
int flag = reader.ReadInt32();
}
File file = fsom.AddFile(FileName);
if (decompressedSize == 0)
{
decompressedSize = compressedSize;
}
file.Size = decompressedSize;
file.Properties.Add("reader", reader);
file.Properties.Add("offset", offset);
if (Compressed)
{
file.Properties.Add("compressedLength", compressedSize);
file.Properties.Add("decompressedLength", compressedSize);
}
else
{
file.Properties.Add("length", compressedSize);
}
file.DataRequest += file_DataRequest;
}
}
else
{
throw new InvalidDataFormatException("Unrecognized FARC signature: \"" + FArC + "\"");
}
}
private void file_DataRequest(object sender, DataRequestEventArgs e)
@ -200,6 +170,7 @@ namespace UniversalEditor.Plugins.Sega.DataFormats.FileSystem.Sega.FARC
int decompressedLength = (int)file.Properties["decompressedLength"];
byte[] compressedData = reader.ReadBytes(compressedLength);
e.Data = compressedData;
// data encrypted? we have to decrypt it
byte[][] keys =
@ -239,7 +210,6 @@ namespace UniversalEditor.Plugins.Sega.DataFormats.FileSystem.Sega.FARC
// FIXME: Project DIVA F key seems to work (without throwing an invalid padding error) but is not in a known compression
// method...
System.IO.File.WriteAllBytes(@"C:\Temp\test.dat", encryptedData);
e.Data = Compression.CompressionModule.FromKnownCompressionMethod(Compression.CompressionMethod.Gzip).Decompress(encryptedData);
}
else if (Compressed && !Encrypted)
@ -311,15 +281,17 @@ namespace UniversalEditor.Plugins.Sega.DataFormats.FileSystem.Sega.FARC
Writer writer = base.Accessor.Writer;
writer.Endianness = Endianness.BigEndian;
writer.WriteFixedLengthString("FA");
writer.WriteFixedLengthString(Encrypted ? "R" : "r");
writer.WriteFixedLengthString(Compressed ? "C" : "c");
if (Compressed && Encrypted)
{
writer.WriteFixedLengthString("FARC");
Console.WriteLine("ue: Sega.FARC: Compressed AND encrypted FARC not supported yet");
}
else if (Compressed && !Encrypted)
{
writer.WriteFixedLengthString("FArC");
int directorySize = 0;
int directorySize = 4;
int dummy = 32;
int offset = 8;
@ -354,7 +326,6 @@ namespace UniversalEditor.Plugins.Sega.DataFormats.FileSystem.Sega.FARC
}
else if (!Compressed && !Encrypted)
{
writer.WriteFixedLengthString("FArc");
int directorySize = 4;
int dummy = 32;
foreach (File file in files)