优化Waveform渲染性能

Source/Arona/UI/Widget/PatternThumbnail/SSamplePatternThumbnail.cpp

@@ -3,32 +3,29 @@
 
 #include "SSamplePatternThumbnail.h"
 
-#include "Async.h"
 #include "SlateApplication.h"
 #include "SlateOptMacros.h"
-#include "ExecutionTime.h"
-#include "Pattern/SamplePatternInstance.h"
 #include "PluginHost/Sampler.h"
-#include "UI/Widget/SUpdatableImage.h"
-#include "UI/Widget/Thumbnail.h"
 
 BEGIN_SLATE_FUNCTION_BUILD_OPTIMIZATION
 
-TArray<float> FSampleWaveformHandle::GetWaveform(int32 SizeX) const
+TArrayView<const FSamplePeak> FSamplePatternWaveformHandle::GetWaveform(int32 SizeX)
 {
-	
-	const FSampler* Sampler = SampleInstance->GetInstanceOwner()->GetSampler();
-	TArray<TArray64<float>> Copy = Sampler->GetSampleBuffer(); // 拷贝以防在渲染时被修改
-	uint32 Count = Sampler->GetFrameCount();
-	TRange<uint32> Range = SampleInstance->GetRange();
-	return Thumbnail::GenerateWaveformData(SizeX, Copy, Count, Range);
+	if (!RenderData)
+	{
+		RenderData = new FWaveform(1, 1024);
+		RenderData->UpdatePeak(Sampler->GetSampleBuffer());
+	}
+	return RenderData->GetPeakFromRange(0, SizeX, 0, Sampler->GetFrameCount());
 }
 
 void SSamplePatternThumbnail::Construct(const FArguments& InArgs, FSampler* InSampler)
 {
+	WaveformHandle = MakeShared<FSamplePatternWaveformHandle>(InSampler);
 	ChildSlot
 	[
-		
+		SAssignNew(WaveformViewer, SWaveformViewer)
+		.WaveformHandle(WaveformHandle)
 	];
 }