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zwinder rewinder - fix all sorts of funsies when the state count cap is reached

This commit is contained in:
nattthebear 2020-08-22 14:58:35 -04:00
parent 7423a00fbf
commit 1f84dcdeb2
2 changed files with 27 additions and 0 deletions
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6
src/BizHawk.Client.Common/rewind/ZwinderBuffer.cs
View File

@ -136,6 +136,12 @@ namespace BizHawk.Client.Common
if (!force && !ShouldCapture(frame))
return;
if (Count == STATEMASK)
{
indexInvalidated?.Invoke(0);
_firstStateIndex = (_firstStateIndex + 1) & STATEMASK;
}
var start = (_states[HeadStateIndex].Start + _states[HeadStateIndex].Size) & _sizeMask;
var initialMaxSize = Count > 0
? (_states[_firstStateIndex].Start - start) & _sizeMask

21
src/BizHawk.Tests/Client.Common/Movie/ZwinderStateManagerTests.cs
View File

@ -25,6 +25,27 @@ namespace BizHawk.Tests.Client.Common.Movie
Assert.AreEqual(zw.Settings.RecentBufferSize, zw2.Settings.RecentBufferSize);
}
[TestMethod]
public void CountEvictWorks()
{
using var zb = new ZwinderBuffer(new RewindConfig
{
BufferSize = 1,
TargetFrameLength = 1
});
var ss = new StateSource
{
PaddingData = new byte[10]
};
var stateCount = 0;
for (int i = 0; i < 1000000; i++)
{
zb.Capture(i, s => ss.SaveStateBinary(new BinaryWriter(s)), j => stateCount--, true);
stateCount++;
}
Assert.AreEqual(zb.Count, stateCount);
}
[TestMethod]
public void SaveCreateBufferRoundTrip()
{