feat: make demoheader unique for every instance

Author: Krzyhau

src/Modules/EngineDemoRecorder.cpp

@@ -21,6 +21,7 @@
 
 #include <cstdio>
 #include <filesystem>
+#include <Hook.hpp>
 
 REDECL(EngineDemoRecorder::SetSignonState);
 REDECL(EngineDemoRecorder::StartRecording);
@@ -346,6 +347,10 @@ DETOUR_COMMAND(EngineDemoRecorder::record) {
 	}
 }
 
+Memory::Patch *g_StartupDemoFile_headerNamePatch;
+Memory::Patch *g_StartupDemoHeader_headerNamePatch;
+std::string g_uniqueDemoHeaderName;
+
 bool EngineDemoRecorder::Init() {
 	auto disconnect = engine->cl->Original(Offsets::Disconnect);
 	auto demorecorder = Memory::DerefDeref<void *>(disconnect + Offsets::demorecorder);
@@ -355,6 +360,19 @@ bool EngineDemoRecorder::Init() {
 		this->s_ClientDemoRecorder->Hook(EngineDemoRecorder::StopRecording_Hook, EngineDemoRecorder::StopRecording, Offsets::StopRecording);
 		if (!sar.game->Is(SourceGame_INFRA | SourceGame_Portal2_2011)) {
 			this->s_ClientDemoRecorder->Hook(EngineDemoRecorder::RecordCustomData_Hook, EngineDemoRecorder::RecordCustomData, Offsets::RecordCustomData);
+			
+			uint32_t uniqueId = static_cast<uint32_t>(time(NULL));
+			g_uniqueDemoHeaderName = Utils::ssprintf("demoheader_%08x.tmp", uniqueId);
+
+			auto uniqueDemoHeaderName = g_uniqueDemoHeaderName.c_str();
+			auto uniqueDemoHeaderNamePtr = (unsigned char *)&uniqueDemoHeaderName;
+
+			g_StartupDemoFile_headerNamePatch = new Memory::Patch();
+			auto StartupDemoFile = Memory::Scan(this->Name(), Offsets::StartupDemoFile);
+			g_StartupDemoFile_headerNamePatch->Execute(StartupDemoFile + Offsets::StartupDemoFile_HeaderName, uniqueDemoHeaderNamePtr, 4);
+			g_StartupDemoHeader_headerNamePatch = new Memory::Patch();
+			auto StartupDemoHeader = Memory::Scan(this->Name(), Offsets::StartupDemoHeader);
+			g_StartupDemoHeader_headerNamePatch->Execute(StartupDemoHeader + Offsets::StartupDemoHeader_HeaderName, uniqueDemoHeaderNamePtr, 4);
 		}
 
 		this->GetRecordingTick = s_ClientDemoRecorder->Original<_GetRecordingTick>(Offsets::GetRecordingTick);
@@ -371,6 +389,11 @@ bool EngineDemoRecorder::Init() {
 	return this->hasLoaded = this->s_ClientDemoRecorder;
 }
 void EngineDemoRecorder::Shutdown() {
+	g_StartupDemoFile_headerNamePatch->Restore();
+	SAFE_DELETE(g_StartupDemoFile_headerNamePatch);
+	g_StartupDemoHeader_headerNamePatch->Restore();
+	SAFE_DELETE(g_StartupDemoHeader_headerNamePatch);
+
 	Interface::Delete(this->s_ClientDemoRecorder);
 	Command::Unhook("stop", EngineDemoRecorder::stop_callback);
 	Command::Unhook("record", EngineDemoRecorder::record_callback);

src/Offsets/Portal 2 9568.hpp

@@ -468,6 +468,14 @@ OFFSET_DEFAULT(Cmd_ShutdownOff, 3, 11)
 OFFSET_DEFAULT(Cmd_ShutdownOff2, 10, 10)
 
 
+// EngineDemoRecorder
+// "demoheader.tmp"
+SIGSCAN_DEFAULT(StartupDemoHeader, "56 8B F1 E8 ? ? ? ? 6A 00 6A 00 68 ? ? ? ? 8D", "")
+OFFSET_DEFAULT(StartupDemoHeader_HeaderName, 13, 13)
+SIGSCAN_DEFAULT(StartupDemoFile, "55 8B EC 81 EC 18 02 00 00 53 8B D9 80", "")
+OFFSET_DEFAULT(StartupDemoFile_HeaderName, 212, 212)
+
+
 // EngineDemoPlayer
 SIGSCAN_DEFAULT(InterpolateDemoCommand, "55 8B EC 83 EC 10 56 8B F1 8B 4D 10 57 8B BE B4 05 00 00 83 C1 04 89 75 F4 89 7D F0 E8 ? ? ? ? 8B 4D 14 83 C1 04",
                                         "55 57 56 53 83 EC 10 8B 44 24 24 8B 5C 24 2C 8B 88 B0 05 00 00 8B 44 24 30 8D 70 04 8D 90 9C 00 00 00 89 F0 F3 0F 10 40 04")