slight tastudio tweaks wrt 12830bab4e

src/BizHawk.Client.Common/movie/tasproj/TasMovie.cs

@@ -196,7 +196,7 @@ namespace BizHawk.Client.Common
 			LagLog[Emulator.Frame] = _inputPollable.IsLagFrame;
 
 			// We will forbibly capture a state for the last edited frame (requested by #916 for case of "platforms with analog stick")
-			TasStateManager.Capture(Emulator.Frame, Emulator.AsStatable(), !Emulator.AsStatable().AvoidRewind && Emulator.Frame == LastEditedFrame - 1);
+			TasStateManager.Capture(Emulator.Frame, Emulator.AsStatable(), Emulator.Frame == LastEditedFrame - 1);
 		}
 
 		

src/BizHawk.Client.Common/movie/tasproj/ZwinderStateManager.cs

@@ -327,6 +327,12 @@ namespace BizHawk.Client.Common
 				return;
 			}
 
+			// avoid capturing in this case
+			if (source.AvoidRewind)
+			{
+				return;
+			}
+
 			// We use the gap buffer for forced capture to avoid crowding the "current" buffer and thus reducing it's actual span of covered frames.
 			if (NeedsGap(frame) || force)
 			{
@@ -334,12 +340,6 @@ namespace BizHawk.Client.Common
 				return;
 			}
 
-			// avoid capturing in this case
-			if (source.AvoidRewind)
-			{
-				return;
-			}
-
 			_current.Capture(frame,
 				s =>
 				{

src/BizHawk.Client.EmuHawk/tools/TAStudio/BookmarksBranchesBox.cs

@@ -152,6 +152,24 @@ namespace BizHawk.Client.EmuHawk
 			}
 		}
 
+		// used to capture a reserved state immediately on branch creation
+		// while also not doing a double state
+		private class BufferedStatable : IStatable
+		{
+			private readonly byte[] _bufferedState;
+
+			public BufferedStatable(byte[] state)
+				=> _bufferedState = state;
+
+			public bool AvoidRewind => true;
+
+			public void SaveStateBinary(BinaryWriter writer)
+				=> writer.Write(_bufferedState);
+
+			public void LoadStateBinary(BinaryReader reader)
+				=> throw new NotImplementedException();
+		}
+
 		/// <summary>
 		/// Add a new branch.
 		/// </summary>
@@ -163,6 +181,7 @@ namespace BizHawk.Client.EmuHawk
 			BranchView.RowCount = Branches.Count;
 			Branches.Current = Branches.Count - 1;
 			Movie.TasSession.UpdateValues(Tastudio.Emulator.Frame, Branches.Current);
+			Movie.TasStateManager.Capture(Tastudio.Emulator.Frame, new BufferedStatable(branch.CoreData));
 			BranchView.ScrollToIndex(Branches.Current);
 			BranchView.DeselectAll();
 			Select(Branches.Current, true);
@@ -174,36 +193,12 @@ namespace BizHawk.Client.EmuHawk
 		public TasBranch SelectedBranch
 			=> BranchView.AnyRowsSelected ? Branches[BranchView.FirstSelectedRowIndex] : null;
 
-		// to avoid a double (potentially slow) state
-		private class BufferedStatable : IStatable
-		{
-			private readonly Lazy<byte[]> _bufferedState;
-			public byte[] BufferedState => _bufferedState.Value;
-
-			public BufferedStatable(IStatable statable)
-			{
-				_bufferedState = new(statable.CloneSavestate);
-				AvoidRewind = statable.AvoidRewind;
-			}
-
-			public bool AvoidRewind { get; }
-
-			public void SaveStateBinary(BinaryWriter writer)
-				=> writer.Write(BufferedState);
-
-			public void LoadStateBinary(BinaryReader reader)
-				=> throw new NotImplementedException();
-		}
-
 		private TasBranch CreateBranch()
 		{
-			var bufferedStatable = new BufferedStatable(Tastudio.Emulator.AsStatable());
-			Movie.TasStateManager.Capture(Tastudio.Emulator.Frame, bufferedStatable, bufferedStatable.AvoidRewind);
-
 			return new()
 			{
 				Frame = Tastudio.Emulator.Frame,
-				CoreData = bufferedStatable.BufferedState,
+				CoreData = Tastudio.Emulator.AsStatable().CloneSavestate(),
 				InputLog = Movie.GetLogEntries().Clone(),
 				CoreFrameBuffer = MainForm.MakeScreenshotImage(),
 				OSDFrameBuffer = MainForm.CaptureOSD(),
@@ -224,7 +219,7 @@ namespace BizHawk.Client.EmuHawk
 
 			Movie.LoadBranch(branch);
 			Tastudio.LoadState(new(branch.Frame, new MemoryStream(branch.CoreData, false)));
-			Movie.TasStateManager.Capture(Tastudio.Emulator.Frame, Tastudio.Emulator.AsStatable(), Tastudio.Emulator.AsStatable().AvoidRewind);
+			Movie.TasStateManager.Capture(Tastudio.Emulator.Frame, Tastudio.Emulator.AsStatable());
 			Tastudio.MainForm.QuickBmpFile.Copy(new BitmapBufferVideoProvider(branch.CoreFrameBuffer), Tastudio.VideoProvider);
 
 			if (Tastudio.Settings.OldControlSchemeForBranches && Tastudio.TasPlaybackBox.RecordingMode)
@@ -312,7 +307,9 @@ namespace BizHawk.Client.EmuHawk
 			_branchUndo = BranchUndo.Update;
 
 			BranchView.ScrollToIndex(Branches.Current);
-			Branches.Replace(SelectedBranch, CreateBranch());
+			var branch = CreateBranch();
+			Branches.Replace(SelectedBranch, branch);
+			Movie.TasStateManager.Capture(Tastudio.Emulator.Frame, new BufferedStatable(branch.CoreData));
 			Tastudio.RefreshDialog();
 			SavedCallback?.Invoke(Branches.Current);
 			Tastudio.MainForm.AddOnScreenMessage($"Saved branch {Branches.Current + 1}");