public static void CompressMMFiles()
{
/// Re-Compressing the files back into a compressed rom is the most expensive job during seed creation.
/// To speed up, we compress files in parallel with a sorted list to reduce idle threads at the end.
var startTime = DateTime.Now;
// sorting the list with .Where().ToList() => OrderByDescending().ToList only takes (~ 0.400 miliseconds) on Isghj's computer
var sortedCompressibleFiles = RomData.MMFileList.Where(file => file.IsCompressed && file.WasEdited).ToList();
sortedCompressibleFiles = sortedCompressibleFiles.OrderByDescending(file => file.Data.Length).ToList();
// Debug.WriteLine($" sort the list with Sort() : [{(DateTime.Now).Subtract(startTime).TotalMilliseconds} (ms)]");
// lower priority so that the rando can't lock a badly scheduled CPU by using 100%
var previousThreadPriority = Thread.CurrentThread.Priority;
Thread.CurrentThread.Priority = ThreadPriority.Lowest;
// yaz0 encode all of the files for the rom
Parallel.ForEach(sortedCompressibleFiles.AsParallel().AsOrdered(), file =>
{
//var yazTime = DateTime.Now;
file.Data = Yaz.EncodeAndCopy(file.Data);
//Debug.WriteLine($" size: [{file.Data.Length}] time to complete compression : [{(DateTime.Now).Subtract(yazTime).TotalMilliseconds} (ms)]");
});
// this thread is borrowed, we don't want it to always be the lowest priority, return to previous state
Thread.CurrentThread.Priority = previousThreadPriority;
Debug.WriteLine($" compress all files time : [{(DateTime.Now).Subtract(startTime).TotalMilliseconds} (ms)]");
}
public static byte[] BuildROM()
{
// yaz0 encode all of the files for the rom
Parallel.ForEach(RomData.MMFileList, file =>
{
if (file.IsCompressed && file.WasEdited)
{
// lower priority so that the rando can't lock a badly scheduled CPU by using 100%
var previousThreadPriority = Thread.CurrentThread.Priority;
Thread.CurrentThread.Priority = ThreadPriority.Lowest;
file.Data = Yaz.EncodeAndCopy(file.Data);
// this thread is borrowed, we don't want it to always be the lowest priority, return to previous state
Thread.CurrentThread.Priority = previousThreadPriority;
}
});
byte[] ROM = new byte[0x2000000];
int ROMAddr = 0;
// write all files to rom
for (int i = 0; i < RomData.MMFileList.Count; i++)
{
if (RomData.MMFileList[i].Cmp_Addr == -1)
{
continue;
}
RomData.MMFileList[i].Cmp_Addr = ROMAddr;
int fileLength = RomData.MMFileList[i].Data.Length;
if (RomData.MMFileList[i].IsCompressed)
{
RomData.MMFileList[i].Cmp_End = ROMAddr + fileLength;
}
if (ROMAddr + fileLength > ROM.Length) // rom too small
{
// assuming the largest file isn't the last one, we still want some extra space for further files
// padding will reduce the requirements for further resizes
int expansionIncrementSize = 0x40000; // 1mb might be too large, not sure if there is a hardware compatiblity issue here
int expansionLength = (((ROMAddr + fileLength - ROM.Length) / expansionIncrementSize) + 1) * expansionIncrementSize;
byte[] newROM = new byte[ROM.Length + expansionLength];
Buffer.BlockCopy(ROM, 0, newROM, 0, ROM.Length);
Buffer.BlockCopy(new byte[expansionLength], 0, newROM, ROM.Length, expansionLength);
ROM = newROM;
Debug.WriteLine("*** Expanding rom to size 0x" + ROM.Length.ToString("X2") + "***");
}
ReadWriteUtils.Arr_Insert(RomData.MMFileList[i].Data, 0, fileLength, ROM, ROMAddr);
ROMAddr += fileLength;
}
SequenceUtils.UpdateBankInstrumentPointers(ROM);
UpdateFileTable(ROM);
SignROM(ROM);
FixCRC(ROM);
return(ROM);
}