Unreal mqx support

hl2ss_unreal/Plugins/hl2ss/Source/hl2ss/Private/hl2ss_api.cpp

@@ -16,6 +16,11 @@ typedef void(*pfn_MQ_SI_Pop)(uint32_t& command, uint8_t* data);
 typedef void(*pfn_MQ_SO_Push)(uint32_t id);
 typedef void(*pfn_MQ_Restart)();
 
+typedef uint32_t(*pfn_MQX_CO_Peek)();
+typedef void(*pfn_MQX_CO_Pop)(uint32_t& id);
+typedef void(*pfn_MQX_CI_Push)(uint32_t command, uint32_t size, uint8_t const* data);
+typedef void(*pfn_MQX_Restart)();
+
 #if PLATFORM_HOLOLENS
 extern "C" { HMODULE LoadLibraryW(LPCWSTR lpLibFileName); }
 #endif
@@ -34,6 +39,11 @@ void* hl2ss_api::p_MQ_SI_Pop = NULL;
 void* hl2ss_api::p_MQ_SO_Push = NULL;
 void* hl2ss_api::p_MQ_Restart = NULL;
 
+void* hl2ss_api::p_MQX_CO_Peek = NULL;
+void* hl2ss_api::p_MQX_CO_Pop = NULL;
+void* hl2ss_api::p_MQX_CI_Push = NULL;
+void* hl2ss_api::p_MQX_Restart = NULL;
+
 int hl2ss_api::Load()
 {
     FString path_base = FPaths::ProjectPluginsDir() + L"hl2ss/Binaries/hl2ss/";
@@ -66,6 +76,11 @@ int hl2ss_api::Load()
     p_MQ_SO_Push = GetProcAddress((HMODULE)hmod_hl2ss, "MQ_SO_Push");
     p_MQ_Restart = GetProcAddress((HMODULE)hmod_hl2ss, "MQ_Restart");
 
+    p_MQX_CO_Peek = GetProcAddress((HMODULE)hmod_hl2ss, "MQX_CO_Peek");
+    p_MQX_CO_Pop = GetProcAddress((HMODULE)hmod_hl2ss, "MQX_CO_Pop");
+    p_MQX_CI_Push = GetProcAddress((HMODULE)hmod_hl2ss, "MQX_CI_Push");
+    p_MQX_Restart = GetProcAddress((HMODULE)hmod_hl2ss, "MQX_Restart");
+
     if (p_InitializeStreams == NULL) { return -7; }
     if (p_DebugMessage == NULL) { return -8; }
     if (p_OverrideWorldCoordinateSystem == NULL) { return -9; }
@@ -76,6 +91,11 @@ int hl2ss_api::Load()
     if (p_MQ_SO_Push == NULL) { return -13; }
     if (p_MQ_Restart == NULL) { return -14; }
 
+    if (p_MQX_CO_Peek == NULL) { return -15; }
+    if (p_MQX_CO_Pop == NULL) { return -16; }
+    if (p_MQX_CI_Push == NULL) { return -17; }
+    if (p_MQX_Restart == NULL) { return -18; }
+
     return 1;
 }
 
@@ -133,3 +153,27 @@ void hl2ss_api::MQ_Restart()
     if (p_MQ_Restart == NULL) { return; }
     reinterpret_cast<pfn_MQ_Restart>(p_MQ_Restart)();
 }
+
+uint32_t hl2ss_api::MQX_CO_Peek()
+{
+    if (p_MQX_CO_Peek == NULL) { return 0xFFFFFFFF; }
+    return reinterpret_cast<pfn_MQX_CO_Peek>(p_MQX_CO_Peek)();
+}
+
+void hl2ss_api::MQX_CO_Pop(uint32_t& id)
+{
+    if (p_MQX_CO_Pop == NULL) { return; }
+    reinterpret_cast<pfn_MQX_CO_Pop>(p_MQX_CO_Pop)(id);
+}
+
+void hl2ss_api::MQX_CI_Push(uint32_t command, uint32_t size, uint8_t const* data)
+{
+    if (p_MQX_CI_Push == NULL) { return; }
+    reinterpret_cast<pfn_MQX_CI_Push>(p_MQX_CI_Push)(command, size, data);
+}
+
+void hl2ss_api::MQX_Restart()
+{
+    if (p_MQX_Restart == NULL) { return; }
+    reinterpret_cast<pfn_MQX_Restart>(p_MQX_Restart)();
+}

hl2ss_unreal/Plugins/hl2ss/Source/hl2ss/Public/hl2ss_api.h

@@ -24,6 +24,11 @@ class HL2SS_API hl2ss_api
     static void* p_MQ_SO_Push;
     static void* p_MQ_Restart;
 
+    static void* p_MQX_CO_Peek;
+    static void* p_MQX_CO_Pop;
+    static void* p_MQX_CI_Push;
+    static void* p_MQX_Restart;
+
     static int Load();
 
 public:
@@ -41,6 +46,7 @@ class HL2SS_API hl2ss_api
         ENABLE_EET =  512,
         ENABLE_EA  = 1024,
         ENABLE_EV  = 2048,
+        ENABLE_MQX = 4096,
 
         ENABLE_ALL = 0xFFFFFFFF,
     };
@@ -57,4 +63,8 @@ class HL2SS_API hl2ss_api
     static void MQ_SI_Pop(uint32_t& command, uint8_t* data);
     static void MQ_SO_Push(uint32_t id);
     static void MQ_Restart();
+    static uint32_t MQX_CO_Peek();
+    static void MQX_CO_Pop(uint32_t& id);
+    static void MQX_CI_Push(uint32_t command, uint32_t size, uint8_t const* data);
+    static void MQX_Restart();
 };

hl2ss_unreal/Source/hl2ss_unreal/hl2ss_loader.cpp

@@ -31,13 +31,20 @@ void Ahl2ss_loader::BeginPlay()
 	auto ip_address = FString(buffer);
 	hl2ss_api::DebugMessage(StringCast<ANSICHAR>(*ip_address).Get());
 
+	mqx_state = 0;
 }
 
 // Called every frame
 void Ahl2ss_loader::Tick(float DeltaTime)
 {
 	Super::Tick(DeltaTime);
 
+	ProcessClientMessage();
+	ProcessServerMessage();
+}
+
+void Ahl2ss_loader::ProcessClientMessage()
+{
 	// Translate and process client messages
 
 	uint32_t size = hl2ss_api::MQ_SI_Peek();
@@ -67,3 +74,25 @@ void Ahl2ss_loader::Tick(float DeltaTime)
 	if (command == hl2ss_api::CLIENT_DISCONNECTED) { hl2ss_api::MQ_Restart(); }
 }
 
+void Ahl2ss_loader::ProcessServerMessage()
+{
+	char const* text = "Hello from HoloLens 2!";
+	uint32_t status;
+	uint32_t response;
+
+	switch (mqx_state)
+	{
+	case 0:
+		hl2ss_api::MQX_CI_Push(0xFFFFFFFE, (uint32_t)strlen(text), (uint8_t*)text);
+		mqx_state = 1;
+		break;
+	case 1:
+		status = hl2ss_api::MQX_CO_Peek();
+		if (status == hl2ss_api::QUEUE_EMPTY) { break; }
+		hl2ss_api::MQX_CO_Pop(response);
+		if (response != hl2ss_api::CLIENT_DISCONNECTED) { break; }
+		hl2ss_api::MQX_Restart();
+		mqx_state = 0;
+		break;
+	}
+}

hl2ss_unreal/Source/hl2ss_unreal/hl2ss_loader.h

@@ -11,10 +11,15 @@ class HL2SS_UNREAL_API Ahl2ss_loader : public AActor
 {
 	GENERATED_BODY()
 
+	int mqx_state;
+
 public:	
 	// Sets default values for this actor's properties
 	Ahl2ss_loader();
 
+	void ProcessClientMessage();
+	void ProcessServerMessage();
+
 protected:
 	// Called when the game starts or when spawned
 	virtual void BeginPlay() override;