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92 lines
3.6 KiB
92 lines
3.6 KiB
// This file is part of the FidelityFX SDK.
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//
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// Copyright (C) 2024 Advanced Micro Devices, Inc.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files(the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and /or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions :
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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#ifndef FFX_OPTICALFLOW_GENERATE_SCD_HISTOGRAM_H
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#define FFX_OPTICALFLOW_GENERATE_SCD_HISTOGRAM_H
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#define LBASE 10
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FFX_GROUPSHARED FfxUInt32 scdBuffer[256 * LBASE];
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void GenerateSceneChangeDetectionHistogram(FfxInt32x3 iGlobalId, FfxInt32x2 iLocalId, FfxInt32 iLocalIndex, FfxInt32x2 iGroupId, FfxInt32x2 iGroupSize)
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{
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FFX_STATIC const FfxUInt32 HistogramsPerDim = 3;
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FfxUInt32 divX = DisplaySize().x / HistogramsPerDim;
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FfxUInt32 divY = DisplaySize().y / HistogramsPerDim;
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FfxUInt32 nx = iGlobalId.z % HistogramsPerDim;
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FfxUInt32 ny = iGlobalId.z / HistogramsPerDim;
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FfxUInt32 startX = divX * nx;
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FfxUInt32 startY = divY * ny;
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FfxUInt32 stopX = startX + divX;
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FfxUInt32 stopY = startY + divY;
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const FfxUInt32 bufferOffset = iLocalIndex * LBASE;
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for (FfxInt32 i = 0; i < LBASE; i++)
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{
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scdBuffer[bufferOffset + i] = 0;
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}
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FFX_GROUP_MEMORY_BARRIER;
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FfxInt32x2 coord = FfxInt32x2(startX + (4 * iGlobalId.x), startY + iGlobalId.y);
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if (coord.x < stopX)
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{
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for (; coord.y < stopY; coord.y += 128)
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{
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FfxUInt32x4 color = FfxUInt32x4(
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LoadOpticalFlowInput(coord + FfxInt32x2(0, 0)),
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LoadOpticalFlowInput(coord + FfxInt32x2(1, 0)),
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LoadOpticalFlowInput(coord + FfxInt32x2(2, 0)),
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LoadOpticalFlowInput(coord + FfxInt32x2(3, 0))
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);
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color *= LBASE;
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FfxUInt32 scramblingOffset = iLocalIndex % LBASE;
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#if defined(FFX_HLSL)
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InterlockedAdd(scdBuffer[color.x + scramblingOffset], 1);
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InterlockedAdd(scdBuffer[color.y + scramblingOffset], 1);
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InterlockedAdd(scdBuffer[color.z + scramblingOffset], 1);
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InterlockedAdd(scdBuffer[color.w + scramblingOffset], 1);
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#elif defined(FFX_GLSL)
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atomicAdd(scdBuffer[color.x + scramblingOffset], 1);
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atomicAdd(scdBuffer[color.y + scramblingOffset], 1);
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atomicAdd(scdBuffer[color.z + scramblingOffset], 1);
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atomicAdd(scdBuffer[color.w + scramblingOffset], 1);
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#endif
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}
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}
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FFX_GROUP_MEMORY_BARRIER;
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FfxUInt32 value = 0;
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for (FfxInt32 i = 0; i < LBASE; i++)
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{
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value += scdBuffer[bufferOffset + i];
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}
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FfxUInt32 histogramStart = (iGroupSize.x * iGroupSize.y) * iGlobalId.z;
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AtomicIncrementSCDHistogram(FfxInt32(histogramStart + iLocalIndex), value);
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}
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#endif // FFX_OPTICALFLOW_GENERATE_SCD_HISTOGRAM_H
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