增加多屏显示，视频播放

SpaceStudioClient/Source/SpaceStudioClient/Private/MyActor.cpp

@@ -0,0 +1,27 @@
+// Fill out your copyright notice in the Description page of Project Settings.
+
+
+#include "MyActor.h"
+
+// Sets default values
+AMyActor::AMyActor()
+{
+ 	// Set this actor to call Tick() every frame.  You can turn this off to improve performance if you don't need it.
+	PrimaryActorTick.bCanEverTick = true;
+
+}
+
+// Called when the game starts or when spawned
+void AMyActor::BeginPlay()
+{
+	Super::BeginPlay();
+	
+}
+
+// Called every frame
+void AMyActor::Tick(float DeltaTime)
+{
+	Super::Tick(DeltaTime);
+
+}
+

SpaceStudioClient/Source/SpaceStudioClient/Private/MyBlueprintFunctionLibrary.cpp

@@ -0,0 +1,133 @@
+// Fill out your copyright notice in the Description page of Project Settings.
+#include "MyBlueprintFunctionLibrary.h"
+
+#include <windows.h>
+#include <mmdeviceapi.h>
+#include <endpointvolume.h>
+#include <audioclient.h>
+#include <iostream>
+#pragma comment(lib, "ole32.lib")
+
+// 获取当前系统音量
+float _GetSystemVolume() {
+    HRESULT hr;
+    IMMDeviceEnumerator* pEnumerator = NULL;
+    IMMDevice* pDevice = NULL;
+    IAudioEndpointVolume* pEndpointVolume = NULL;
+    float currentVolume = 0.0f;
+
+    // 初始化COM库
+    hr = CoInitialize(NULL);
+    if (FAILED(hr)) {
+        UE_LOG(LogTemp, Warning, TEXT("COM初始化失败"));
+        return -1.0f;
+    }
+
+    // 创建设备枚举器
+    hr = CoCreateInstance(__uuidof(MMDeviceEnumerator), NULL, CLSCTX_ALL,
+        __uuidof(IMMDeviceEnumerator), (void**)&pEnumerator);
+    if (FAILED(hr)) {
+        UE_LOG(LogTemp, Warning, TEXT("创建设备枚举器失败"));
+        CoUninitialize();
+        return -1.0f;
+    }
+
+    // 获取默认音频端点
+    hr = pEnumerator->GetDefaultAudioEndpoint(eRender, eConsole, &pDevice);
+    if (FAILED(hr)) {
+        UE_LOG(LogTemp, Warning, TEXT("获取默认音频端点失败"));
+        pEnumerator->Release();
+        CoUninitialize();
+        return -1.0f;
+    }
+
+    // 激活音频端点音量接口
+    hr = pDevice->Activate(__uuidof(IAudioEndpointVolume), CLSCTX_ALL, NULL, (void**)&pEndpointVolume);
+    if (FAILED(hr)) {
+        UE_LOG(LogTemp, Warning, TEXT("激活音频端点音量接口失败"));
+        pDevice->Release();
+        pEnumerator->Release();
+        CoUninitialize();
+        return -1.0f;
+    }
+
+    // 获取当前音量
+    hr = pEndpointVolume->GetMasterVolumeLevelScalar(&currentVolume);
+    if (FAILED(hr)) {
+        UE_LOG(LogTemp, Warning, TEXT("获取音量失败"));
+    }
+
+    // 释放资源
+    pEndpointVolume->Release();
+    pDevice->Release();
+    pEnumerator->Release();
+    CoUninitialize();
+
+    return currentVolume;
+}
+
+// 设置系统音量
+bool _SetSystemVolume(float volume) {
+    HRESULT hr;
+    IMMDeviceEnumerator* pEnumerator = NULL;
+    IMMDevice* pDevice = NULL;
+    IAudioEndpointVolume* pEndpointVolume = NULL;
+
+    // 初始化COM库
+    hr = CoInitialize(NULL);
+    if (FAILED(hr)) {
+        UE_LOG(LogTemp, Warning, TEXT("COM初始化失败"));
+        return false;
+    }
+
+    // 创建设备枚举器
+    hr = CoCreateInstance(__uuidof(MMDeviceEnumerator), NULL, CLSCTX_ALL,
+        __uuidof(IMMDeviceEnumerator), (void**)&pEnumerator);
+    if (FAILED(hr)) {
+        UE_LOG(LogTemp, Warning, TEXT("创建设备枚举器失败"));
+        CoUninitialize();
+        return false;
+    }
+
+    // 获取默认音频端点
+    hr = pEnumerator->GetDefaultAudioEndpoint(eRender, eConsole, &pDevice);
+    if (FAILED(hr)) {
+        UE_LOG(LogTemp, Warning, TEXT("获取默认音频端点失败"));
+        pEnumerator->Release();
+        CoUninitialize();
+        return false;
+    }
+
+    // 激活音频端点音量接口
+    hr = pDevice->Activate(__uuidof(IAudioEndpointVolume), CLSCTX_ALL, NULL, (void**)&pEndpointVolume);
+    if (FAILED(hr)) {
+        UE_LOG(LogTemp, Warning, TEXT("激活音频端点音量接口失败"));
+        pDevice->Release();
+        pEnumerator->Release();
+        CoUninitialize();
+        return false;
+    }
+
+    // 设置音量
+    hr = pEndpointVolume->SetMasterVolumeLevelScalar(volume, NULL);
+    if (FAILED(hr)) {
+        UE_LOG(LogTemp, Warning, TEXT("设置音量失败"));
+    }
+
+    // 释放资源
+    pEndpointVolume->Release();
+    pDevice->Release();
+    pEnumerator->Release();
+    CoUninitialize();
+
+    return SUCCEEDED(hr);
+}
+bool UMyBlueprintFunctionLibrary::SetSystemVolume(float volume)
+{
+    return _SetSystemVolume(volume);
+}
+
+float UMyBlueprintFunctionLibrary::GetSystemVolume()
+{
+   return _GetSystemVolume();
+}