public static ZwinderStateManager Create(BinaryReader br, ZwinderStateManagerSettings settings, Func <int, bool> reserveCallback)
{
// 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 = br.ReadByte();
var current = ZwinderBuffer.Create(br, settings.Current(), version == 0);
var recent = ZwinderBuffer.Create(br, settings.Recent());
var gaps = ZwinderBuffer.Create(br, settings.GapFiller());
if (version == 0)
{
settings.AncientStateInterval = br.ReadInt32();
}
var ret = new ZwinderStateManager(current, recent, gaps, reserveCallback, settings);
var ancientCount = br.ReadInt32();
for (var i = 0; i < ancientCount; i++)
{
var key = br.ReadInt32();
var length = br.ReadInt32();
var data = br.ReadBytes(length);
ret._reserved.Add(key, data);
}
ret.RebuildStateCache();
return(ret);
}
public static ZwinderStateManager Create(BinaryReader br, ZwinderStateManagerSettings settings, Func <int, bool> reserveCallback)
{
var current = ZwinderBuffer.Create(br);
var recent = ZwinderBuffer.Create(br);
var gaps = ZwinderBuffer.Create(br);
var ancientInterval = br.ReadInt32();
var ret = new ZwinderStateManager(current, recent, gaps, ancientInterval, reserveCallback)
{
Settings = settings
};
var ancientCount = br.ReadInt32();
for (var i = 0; i < ancientCount; i++)
{
var key = br.ReadInt32();
var length = br.ReadInt32();
var data = br.ReadBytes(length);
ret._reserved.Add(key, data);
}
ret.RebuildStateCache();
return(ret);
}
public static ZwinderStateManager Create(BinaryReader br, ZwinderStateManagerSettings settings)
{
var current = ZwinderBuffer.Create(br);
var recent = ZwinderBuffer.Create(br);
var highPriority = ZwinderBuffer.Create(br);
var original = br.ReadBytes(br.ReadInt32());
var ancientInterval = br.ReadInt32();
var ret = new ZwinderStateManager(current, recent, highPriority, original, ancientInterval)
{
Settings = settings
};
var ancientCount = br.ReadInt32();
for (var i = 0; i < ancientCount; i++)
{
var key = br.ReadInt32();
var length = br.ReadInt32();
var data = br.ReadBytes(length);
ret._ancient.Add(new KeyValuePair <int, byte[]>(key, data));
}
return(ret);
}
public ZwinderStateManager(ZwinderStateManagerSettings settings)
{
Settings = settings;
_current = new ZwinderBuffer(new RewindConfig
{
UseCompression = settings.CurrentUseCompression,
BufferSize = settings.CurrentBufferSize,
TargetFrameLength = settings.CurrentTargetFrameLength
});
_recent = new ZwinderBuffer(new RewindConfig
{
UseCompression = settings.RecentUseCompression,
BufferSize = settings.RecentBufferSize,
TargetFrameLength = settings.RecentTargetFrameLength
});
_highPriority = new ZwinderBuffer(new RewindConfig
{
UseCompression = settings.PriorityUseCompression,
BufferSize = settings.PriorityBufferSize,
TargetFrameLength = settings.PriorityTargetFrameLength
});
_ancientInterval = settings.AncientStateInterval;
_originalState = NonState;
}
private ZwinderStateManager(ZwinderBuffer current, ZwinderBuffer recent, ZwinderBuffer gapFiller, int ancientInterval, Func <int, bool> reserveCallback)
{
_current = current;
_recent = recent;
_gapFiller = gapFiller;
_ancientInterval = ancientInterval;
_reserveCallback = reserveCallback;
}
private ZwinderStateManager(ZwinderBuffer current, ZwinderBuffer recent, ZwinderBuffer highPriority, byte[] frameZeroState, int ancientInterval)
{
_originalState = (byte[])frameZeroState.Clone();
_current = current;
_recent = recent;
_highPriority = highPriority;
_ancientInterval = ancientInterval;
}
public void Dispose()
{
_current?.Dispose();
_current = null;
_recent?.Dispose();
_recent = null;
_gapFiller?.Dispose();
_gapFiller = null;
}
private ZwinderStateManager(ZwinderBuffer current, ZwinderBuffer recent, ZwinderBuffer gapFiller, Func <int, bool> reserveCallback, ZwinderStateManagerSettings settings)
{
_current = current;
_recent = recent;
_gapFiller = gapFiller;
_reserveCallback = reserveCallback;
Settings = settings;
_ancientInterval = settings.AncientStateInterval;
// init the reserved dictionary
RebuildReserved();
}
public void UpdateSettings(ZwinderStateManagerSettings settings, bool keepOldStates = false)
{
Settings = settings;
_current = UpdateBuffer(_current, settings.Current(), keepOldStates);
_recent = UpdateBuffer(_recent, settings.Recent(), keepOldStates);
_gapFiller = UpdateBuffer(_gapFiller, settings.GapFiller(), keepOldStates);
if (keepOldStates)
{
// For ancients ... lets just make sure we aren't keeping states with a gap below the new interval
if (settings.AncientStateInterval > _ancientInterval)
{
int lastReserved = 0;
List <int> framesToRemove = new List <int>();
foreach (int f in _reserved.Keys)
{
if (!_reserveCallback(f) && f - lastReserved < settings.AncientStateInterval)
{
framesToRemove.Add(f);
}
else
{
lastReserved = f;
}
}
foreach (int f in framesToRemove)
{
if (f != 0)
{
EvictReserved(f);
}
}
}
}
else
{
List <int> framesToRemove = new List <int>();
foreach (int f in _reserved.Keys)
{
if (f != 0 && !_reserveCallback(f))
{
framesToRemove.Add(f);
}
}
foreach (int f in framesToRemove)
{
EvictReserved(f);
}
}
_ancientInterval = settings.AncientStateInterval;
RebuildStateCache();
}
public static ZwinderBuffer Create(BinaryReader reader)
{
var size = reader.ReadInt64();
var sizeMask = reader.ReadInt64();
var targetFrameLength = reader.ReadInt32();
var useCompression = reader.ReadBoolean();
var ret = new ZwinderBuffer(new RewindConfig
{
BufferSize = (int)(size >> 20),
TargetFrameLength = targetFrameLength,
UseCompression = useCompression
});
if (ret.Size != size || ret._sizeMask != sizeMask)
{
throw new InvalidOperationException("Bad format");
}
ret.LoadStateBodyBinary(reader);
return(ret);
}
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);
}
public Zwinder(IStatable stateSource, IRewindSettings settings)
{
_buffer = new ZwinderBuffer(settings);
_stateSource = stateSource;
Active = true;
}
internal StateInformation(ZwinderBuffer parent, int index)
{
_index = index;
_parent = parent;
}
