dsda: disable BOOM demo import for now

passing rngseed didn't fix sync, and passing all the settings is too much work for this release. will support it afterwards.

instead just tell the user BOOM demos are not supported

src/BizHawk.Client.Common/movie/import/DoomLmpImport.cs

@@ -1,3 +1,5 @@
+using System.Buffers.Binary;
+
 using BizHawk.Common.IOExtensions;
 using BizHawk.Emulation.Common;
 using BizHawk.Emulation.Cores;
@@ -49,6 +51,7 @@ namespace BizHawk.Client.Common
 			var monstersRespawn   = false;
 			var fastMonsters      = false;
 			var noMonsters        = false;
+			//var rngSeed           = 1993U;
 
 			Result.Movie.HeaderEntries[HeaderKeys.Core] = CoreNames.DSDA;
 			Result.Movie.SystemID = VSystemID.Raw.Doom;
@@ -106,6 +109,10 @@ namespace BizHawk.Client.Common
 			}
 			else // Boom territory
 			{
+				Result.Errors.Add($"Found BOOM demo format: v{(int)version}. Importing it is currently not supported.");
+				return;
+
+				/*
 				i++; // skip to signature's second byte
 				var portID = input[i++];
 				i += 4; // skip the rest of the signature
@@ -184,12 +191,10 @@ namespace BizHawk.Client.Common
 				monstersRespawn = input[i++] is not 0;
 				fastMonsters    = input[i++] is not 0;
 				noMonsters      = input[i++] is not 0;
-
-				var optionsSize = compLevel == DSDA.CompatibilityLevel.MBF21 ? 21 + 25 : 64;
-				i += optionsSize - 9; // subtract the options we already parsed
-
-				if (version == DemoVersion.Boom_2_00)
-					i += 256 - optionsSize;
+				i++; // demo insurance
+				rngSeed         = BinaryPrimitives.ReadUInt32BigEndian(input.AsSpan(i, 4));
+				i = 0x4D;
+				*/
 			}
 
 			DSDA.DoomSyncSettings syncSettings = new()
@@ -205,13 +210,14 @@ namespace BizHawk.Client.Common
 				NoMonsters = noMonsters,
 				TurningResolution = turningResolution,
 				RenderWipescreen = false,
+				//RNGSeed = rngSeed,
 			};
 
 			syncSettings.Player1Present = input[i++] is not 0;
 			syncSettings.Player2Present = input[i++] is not 0;
 			syncSettings.Player3Present = input[i++] is not 0;
 			syncSettings.Player4Present = input[i++] is not 0;
-
+			/*
 			if (compLevel >= DSDA.CompatibilityLevel.Boom_Compatibility
 				&& version >= DemoVersion.Boom_2_00)
 			{
@@ -219,7 +225,7 @@ namespace BizHawk.Client.Common
 				var g_maxplayers = 4;
 				i += FUTURE_MAXPLAYERS - g_maxplayers;
 			}
-
+			*/
 			Result.Movie.SyncSettingsJson = ConfigService.SaveWithType(syncSettings);
 
 			var doomController = new DoomControllerDeck(

src/BizHawk.Emulation.Cores/Computers/Doom/DSDA.ISettable.cs

@@ -403,7 +403,12 @@ namespace BizHawk.Emulation.Cores.Computers.Doom
 			[Description("How fast the Doom player will run when using the mouse.")]
 			[DefaultValue(1)]
 			public int MouseRunSensitivity { get; set; }
-
+			/*
+			[DisplayName("Initial RNG Seed")]
+			[Description("Boom demos.")]
+			[DefaultValue(1993)]
+			public uint RNGSeed { get; set; }
+			*/
 			[DisplayName("Player 1 Hexen Class")]
 			[Description("The Hexen class to use for player 1. Has no effect for Doom / Heretic")]
 			[DefaultValue(HexenClass.Fighter)]
@@ -441,7 +446,8 @@ namespace BizHawk.Emulation.Cores.Computers.Doom
 					Player3Class = (int)Player3Class,
 					Player4Class = (int)Player4Class,
 					PreventLevelExit = PreventLevelExit ? 1 : 0,
-					PreventGameEnd = PreventGameEnd ? 1 : 0
+					PreventGameEnd = PreventGameEnd ? 1 : 0,
+					//RNGSeed = RNGSeed,
 				};
 			}
 

src/BizHawk.Emulation.Cores/Computers/Doom/LibDSDA.cs

@@ -36,6 +36,7 @@ namespace BizHawk.Emulation.Cores.Computers.Doom
 			public int Player4Class;
 			public int PreventLevelExit;
 			public int PreventGameEnd;
+			//public uint RNGSeed;
 		}
 
 		[StructLayout(LayoutKind.Sequential)]

waterbox/dsda/BizhawkInterface.c

@@ -283,6 +283,9 @@ ECL_EXPORT int dsda_init(struct InitSettings *settings, int argc, char **argv)
     break;
   }
 
+  //if (compatibility_level >= boom_202_compatibility)
+  //  rngseed = settings->RNGSeed;
+
   // Initializing audio
   I_SetSoundCap();
   I_InitSound();

waterbox/dsda/BizhawkInterface.h

@@ -26,6 +26,7 @@ extern void headlessSetTickCommand(int playerId, int forwardSpeed, int strafingS
 extern void headlessGetMapName(char *outString);
 extern void headlessSetSaveStatePointer(void *savePtr, int saveStateSize);
 extern size_t headlessGetEffectiveSaveSize();
+extern unsigned int rngseed;
 
 // Video
 extern void headlessUpdateVideo();
@@ -140,6 +141,7 @@ struct InitSettings
   int Player4Class;
   int PreventLevelExit;
   int PreventGameEnd;
+  //unsigned int RNGSeed;
 } __attribute__((packed));
 
 struct PackedPlayerInput