52 lines
1.8 KiB
C++
52 lines
1.8 KiB
C++
#include "SSamplePatternInstance.h"
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#include "Pattern/SamplePatternInstance.h"
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#include "UI/Widget/Thumbnail.h"
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#include "UI/Widget/WaveformViewer.h"
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FSamplePatternInstanceWaveformHandle::FSamplePatternInstanceWaveformHandle(SSamplePatternInstance* InPatternInstance):
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PatternInstanceWidget(InPatternInstance)
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{
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}
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TArrayView<const FSamplePeak> FSamplePatternInstanceWaveformHandle::GetWaveform(int32 SizeX)
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{
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FSamplePatternInstance* Instance = (FSamplePatternInstance*)PatternInstanceWidget->GetPatternInstance();
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TRange<AudioFrame> FrameViewRange = PatternInstanceWidget->GetFrameViewRange();
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const FSampler* Sampler = Instance->GetInstanceOwner()->GetSampler();
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const TRange<AudioFrame>& TimeRange = Instance->TimeRange;
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if (!RenderData)
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{
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RenderData = new FWaveform(7, 256 * 128);
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RenderData->UpdatePeak(Sampler->GetSampleBuffer());
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const float MemSize = RenderData->GetMemSize();
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UE_LOG(LogTemp, Warning, TEXT("Waveform MemSize: %f MB"), MemSize / 1024 / 1024);
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}
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const AudioFrame InstancePos = Instance->GetMidiPos();
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FrameViewRange = TRange<AudioFrame>(FrameViewRange.GetLowerBoundValue() - InstancePos, FrameViewRange.GetUpperBoundValue() - InstancePos);
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const AudioFrame BeginFrame = FMath::Max(TimeRange.GetLowerBoundValue(), FrameViewRange.GetLowerBoundValue());
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const AudioFrame EndFrame = FMath::Min(TimeRange.GetUpperBoundValue(), FrameViewRange.GetUpperBoundValue());
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return RenderData->GetPeakFromRange(0, SizeX, BeginFrame, EndFrame);
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}
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SSamplePatternInstance::SSamplePatternInstance()
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{
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WaveformHandle = MakeShared<FSamplePatternInstanceWaveformHandle>(this);
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}
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TSharedRef<SWidget> SSamplePatternInstance::GetViewWidget()
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{
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return SAssignNew(WaveformViewer, SWaveformViewer)
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.WaveformHandle(WaveformHandle);
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}
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void SSamplePatternInstance::RequestUpdate()
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{
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}
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FReply SSamplePatternInstance::OpenPatternMenu()
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{
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return FReply::Handled();
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}
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