public SavedInfo InfoFromLastSavedFrame(int back_from_top = 1)
{
var state = _sync.GetLastSavedFrame(back_from_top);
var info = new SavedInfo
{
Frame = _sync.FrameCount,
Input = _last_input,
Size = state.Size,
Buffer = (byte *)UnsafeUtility.Malloc(state.Size,
UnsafeUtility.AlignOf <byte>(),
Allocator.Temp),
Checksum = state.Checksum,
};
UnsafeUtility.MemCpy(info.Buffer, state.Buffer, info.Size);
return(info);
}
public override void AdvanceFrame()
{
_sync.IncrementFrame();
_current_input.Clear();
Debug.Log($"End of frame({_sync.FrameCount})...");
if (_rollingback)
{
return;
}
int frame = _sync.FrameCount;
// Hold onto the current frame in our queue of saved states. We'll need
// the Checksum later to verify that our replay of the same frame got the
// same results.
var info = new SavedInfo {
Frame = frame,
Input = _last_input,
Size = _sync.GetLastSavedFrame().Size,
Buffer = (byte *)UnsafeUtility.Malloc(_sync.GetLastSavedFrame().Size,
UnsafeUtility.AlignOf <byte>(),
Allocator.Temp),
Checksum = _sync.GetLastSavedFrame().Checksum,
};
UnsafeUtility.MemCpy(info.Buffer, _sync.GetLastSavedFrame().Buffer, info.Size);
_saved_frames.Push(info);
if (frame - _last_verified == _check_distance)
{
// We've gone far enough ahead and should now start replaying frames.
// Load the last verified frame and set the rollback flag to true.
_sync.LoadFrame(_last_verified);
_rollingback = true;
while (!_saved_frames.IsEmpty)
{
_callbacks.AdvanceFrame();
// Verify that the Checksumn of this frame is the same as the one in our
// list.
info = _saved_frames.Peek();
_saved_frames.Pop();
if (info.Frame != _sync.FrameCount)
{
Debug.LogWarning($"SyncTest: Frame number {info.Frame} does not match saved frame number {frame}");
}
int Checksum = _sync.GetLastSavedFrame().Checksum;
if (info.Checksum != Checksum)
{
_callbacks.OnLogState?.Invoke($"Original f{_sync.FrameCount}:", (IntPtr)info.Buffer, info.Size);
_callbacks.OnLogState?.Invoke($"Replay f{_sync.FrameCount}:", (IntPtr)_sync.GetLastSavedFrame().Buffer,
_sync.GetLastSavedFrame().Size);
Debug.LogWarning($"SyncTest: Checksum for frame {frame} does not match saved ({info.Checksum} != {Checksum})");
Debug.Break();
}
else
{
Debug.Log($"Checksum {Checksum} for frame {info.Frame} matches.");
}
UnsafeUtility.Free(info.Buffer, Allocator.Temp);
}
_last_verified = frame;
_rollingback = false;
}
}