vault backup: 2024-09-29 18:07:26

2024-09-29 18:07:26 +08:00
parent 6b2343413b
commit 1e9cfbfab3
2 changed files with 93 additions and 3 deletions
--- a/02-Note/DAWA/ASoul/流程笔记/MultiView逻辑.md
+++ b/02-Note/DAWA/ASoul/流程笔记/MultiView逻辑.md
@@ -1 +1,88 @@
-TsScreenPlayerTextureRenderer => AMultiViewActor
+TsScreenPlayerTextureRenderer => AMultiViewActor
+
+# 多屏与采集卡
+以Preview为例：
+TsDirectorCamManagerActor.ts  
+```c++
+this.PreviewWindow = UE.MultiViewActor.Open(this.GetWorld(), UE.EMultiViewCameraLayout.Display_1920x1080_Layout_4x4, UE.EMultiViewMultiGPUMode.HalfSplit)
+this.PreviewWindow.SetRenderFeaturePlanarReflection(false);
+this.PreviewWindow.SetRenderFeatureNiagara(false);
+
+// video output
+let videoOutputParam = new UE.VideOutputParam()
+videoOutputParam.bBlackMagicCard = false
+videoOutputParam.bLazyStart = false
+this.PreviewWindow.StartVideoOutput(videoOutputParam)
+```
+
+PVW&PGM使用 **BLACKMAGIC_OUTPUT_CONFIG_HORIZONTAL**  也就是/Game/ResArt/BlackmagicMedia/MO_BlackmagicVideoOutput。
+```ts
+ export function StartVideoOutput(camManager : TsDirectorCamManagerActor, targetWindow : UE.MultiViewActor):void{
+	 let videoOutpuParam = new UE.VideOutputParam()
+	videoOutpuParam.FilmbackMode = camManager.FilmbackMode
+	videoOutpuParam.OutputConfigPath = BLACKMAGIC_OUTPUT_CONFIG_HORIZONTAL
+	videoOutpuParam.bBlackMagicCard = true
+	videoOutpuParam.bLazyStart = false
+	if(camManager.FilmbackMode == UE.EFilmbackMode.EFM_1080x1920){
+		videoOutpuParam.MatV2H = GetV2HMaterialInstace(camManager)
+	}
+	targetWindow.StartVideoOutput(videoOutpuParam)
+ }
+```
+
+- DirectorMode.Preview：bBlackMagicCard = false
+- PVW&PGM：bBlackMagicCard = true
+
+## c++
+核心函数在于**AMultiViewActor::StartVideoOutput**
+# UDeckLinkMediaCapture
+
+
+m_DeckLinkOutputDevice = DeckLinkDiscovery->GetDeviceByName(m_DeviceName);
+
+```c++
+FDeckLinkDeviceDiscovery::DeckLinkDeviceArrived(IDeckLink *device)
+{
+	/*TComPtr<IDeckLink> device_;
+	device_ = device;*/
+	
+	TComPtr<FDeckLinkOutputDevice> newDeviceComPtr = new FDeckLinkOutputDevice(device);
+	if (!newDeviceComPtr->Init())
+		return S_OK;
+	
+	std::lock_guard<std::recursive_mutex> lock(m_DeviceMutex);
+	FString deviceName = newDeviceComPtr->GetDeviceName();//看这个Com对象的设备名称是否对应
+	if (!m_Devices.Contains(deviceName) )
+	{
+		m_Devices.Add(deviceName,newDeviceComPtr);
+	}
+	return S_OK;
+}
+```
+
+DeckLinkDeviceArrived调用逻辑位于**DeckLinkAPI_h.h**。
+
+## ADeckLinkOutputActor
+ADeckLinkOutputActor的DeviceName 默认值为"DeckLink Mini Monitor 4K";
+
+判断错误函数
+UMediaCapture::CaptureTextureRenderTarget2D()=>UMediaCapture::StartSourceCapture() => ValidateMediaOutput()
+```c++
+bool UMediaCapture::ValidateMediaOutput() const  
+{  
+    if (MediaOutput == nullptr)  
+    {       UE_LOG(LogMediaIOCore, Error, TEXT("Can not start the capture. The Media Output is invalid."));  
+       return false;  
+    }  
+    FString FailureReason;  
+    if (!MediaOutput->Validate(FailureReason))  
+    {       UE_LOG(LogMediaIOCore, Error, TEXT("Can not start the capture. %s."), *FailureReason);  
+       return false;  
+    }  
+    if(DesiredCaptureOptions.bAutostopOnCapture && DesiredCaptureOptions.NumberOfFramesToCapture < 1)  
+    {       UE_LOG(LogMediaIOCore, Error, TEXT("Can not start the capture. Please set the Number Of Frames To Capture when using Autostop On Capture in the Media Capture Options"));  
+       return false;  
+    }  
+    return true;  
+}
+```