public void Initialize(IStatable statableCore, RewindConfig rewindConfig)
{
Uninitialize();
_statableCore = statableCore;
int stateSize = _statableCore.CloneSavestate().Length;
if (stateSize >= rewindConfig.LargeStateSize)
{
RewindEnabled = rewindConfig.EnabledLarge;
RewindFrequency = rewindConfig.FrequencyLarge;
}
else if (stateSize >= rewindConfig.MediumStateSize)
{
RewindEnabled = rewindConfig.EnabledMedium;
RewindFrequency = rewindConfig.FrequencyMedium;
}
else
{
RewindEnabled = rewindConfig.EnabledSmall;
RewindFrequency = rewindConfig.FrequencySmall;
}
_rewindDeltaEnable = rewindConfig.UseDelta;
if (RewindActive)
{
var capacity = rewindConfig.BufferSize * 1024L * 1024L;
_rewindBuffer = new StreamBlobDatabase(rewindConfig.OnDisk, capacity, BufferManage);
_rewindThread = new RewindThreader(CaptureInternal, RewindInternal, rewindConfig.IsThreaded);
}
}
public bool MatchesSettings(RewindConfig settings)
{
long targetSize = settings.BufferSize * 1024 * 1024;
long size = 1L << (int)Math.Floor(Math.Log(targetSize, 2));
return(Size == size &&
_useCompression == settings.UseCompression &&
_targetFrameLength == settings.TargetFrameLength);
}
public bool MatchesSettings(RewindConfig settings)
{
long targetSize = settings.BufferSize * 1024 * 1024;
long size = 1L << (int)Math.Floor(Math.Log(targetSize, 2));
return(Size == size &&
_useCompression == settings.UseCompression &&
_fixedRewindInterval == settings.UseFixedRewindInterval &&
(_fixedRewindInterval ? _targetRewindInterval == settings.TargetRewindInterval : _targetFrameLength == settings.TargetFrameLength) &&
_backingStoreType == settings.BackingStore);
}
public static ZwinderBuffer Create(BinaryReader reader, RewindConfig rewindConfig, bool hackyV0 = false)
{
ZwinderBuffer ret;
// Initial format had no version number, but I think it's a safe bet no valid file has buffer size 2^56 or more so this should work.
int version = hackyV0 ? 0 : reader.ReadByte();
if (version == 0)
{
byte[] sizeArr = new byte[8];
reader.Read(sizeArr, 1, 7);
var size = BitConverter.ToInt64(sizeArr, 0);
var sizeMask = reader.ReadInt64();
var targetFrameLength = reader.ReadInt32();
var useCompression = reader.ReadBoolean();
ret = new ZwinderBuffer(new RewindConfig
{
BufferSize = (int)(size >> 20),
UseFixedRewindInterval = false,
TargetFrameLength = targetFrameLength,
TargetRewindInterval = 5,
AllowOutOfOrderStates = false,
UseCompression = useCompression
});
if (ret.Size != size || ret._sizeMask != sizeMask)
{
throw new InvalidOperationException("Bad format");
}
}
else if (version == 1)
{
ret = new ZwinderBuffer(rewindConfig);
}
else
{
throw new InvalidOperationException("Bad format");
}
ret.LoadStateBodyBinary(reader);
return(ret);
}
private ZwinderBuffer UpdateBuffer(ZwinderBuffer buffer, RewindConfig newConfig, bool keepOldStates)
{
if (buffer == null) // just make a new one, plain and simple
{
buffer = new ZwinderBuffer(newConfig);
}
else if (!buffer.MatchesSettings(newConfig)) // no need to do anything if these settings are already in use
{
if (keepOldStates)
{
// force capture all the old states, let the buffer handle decay if they don't all fit
ZwinderBuffer old = buffer;
buffer = new ZwinderBuffer(newConfig);
for (int i = 0; i < old.Count; i++)
{
ZwinderBuffer.StateInformation si = old.GetState(i);
// don't allow states that should be reserved to decay here, where we don't attempt re-capture
if (_reserveCallback(si.Frame))
{
AddToReserved(si);
}
else
{
buffer.Capture(si.Frame, s => si.GetReadStream().CopyTo(s), null, true);
}
}
old.Dispose();
}
else
{
buffer.Dispose();
buffer = new ZwinderBuffer(newConfig);
}
}
return(buffer);
}