private unsafe void RefillMaster(ZwinderBuffer.StateInformation state)
{
var lengthHolder = 0;
var lengthHolderSpan = new Span <byte>(&lengthHolder, 4);
var zeldas = SpanStream.GetOrBuild(state.GetReadStream());
zeldas.Read(lengthHolderSpan);
_masterLength = lengthHolder;
fixed(byte *buffer_ = _master)
{
int *buffer = (int *)buffer_;
while (zeldas.Read(lengthHolderSpan) == 4)
{
if ((lengthHolder & IS_GAP) != 0)
{
buffer += lengthHolder & ~IS_GAP;
}
else
{
zeldas.Read(new Span <byte>(buffer, lengthHolder * 4));
buffer += lengthHolder;
}
}
}
_masterFrame = state.Frame;
}
private void AddToReserved(ZwinderBuffer.StateInformation state)
{
if (_reserved.ContainsKey(state.Frame))
{
return;
}
var bb = new byte[state.Size];
var ms = new MemoryStream(bb);
state.GetReadStream().CopyTo(ms);
_reserved.Add(state.Frame, bb);
AddStateCache(state.Frame);
}
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);
}
public StateInfo(ZwinderBuffer.StateInformation si)
{
Frame = si.Frame;
Read = si.GetReadStream;
}