7. Stream Processing (Formal) Wikipedia: Given a set of input and output data (streams), the principle essentially defines a series of computer-intensive operations (kernel functions) to be applied for each element in the stream. Input 1 Kernel 1 Input 2 Kernel 2 Output
10. Morphing+Skinning Example MW Fixed MK Instance 1 Matrices Fixed Weights Fixed Verts Part 1 MT 1 V Part 1 MT 1 V Part 2 MT 2 V Part 1 MT 2 V Part 2 MK Instance 2 Skin V Part 1 Skin V Part 2 SK Instance 1 SK Instance 2 Verts Part 2
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13. Kernel Example: Times2 // Include Kernel Definition macros #include <NiSPKernelMacros.h> // Declare the Timer2Kernel NiSPDeclareKernel(Times2Kernel)
14. Kernel Example: Times2 #include "Times2Kernel.h" NiSPBeginKernelImpl(Times2Kernel) { // Get the input stream float * pInput = kWorkload.GetInput< float > (0); // Get the output stream float * pOutput = kWorkload.GetOutput< float > (0); // Process data NiUInt32 uiBlockCount = kWorkload.GetBlockCount(); for (NiUInt32 ui = 0; ui < uiBlockCount; ui++) { pOutput[ui] = pInput[ui] * 2; } } NiSPEndKernelImpl(Times2Kernel)
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16. Example Workflow // Setup input and output streams from existing buffers NiTSPStream< float> inputStream(SomeInputBuffer, MAX_BLOCKS); NiTSPStream< float> outputStream(SomeOutputBuffer, MAX_BLOCKS); // Get a Workflow and setup a new task for it NiSPWorkflow* pWorkflow = NiStreamProcessor::Get()->GetFreeWorkflow(); NiSPTask* pTask = pWorkflow->AddNewTask(); // Set the kernel and streams pTask->SetKernel(&Times2Kernel); pTask->AddInput(&inputStream); pTask->AddOutput(&outputStream); // Submit workflow for execution NiStreamProcessor::Get()->Submit(pWorkflow); // Do other operations... // Wait for workflow to complete NiStreamProcessor::Get()->Wait(pWorkflow);
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19. Analysis: Workflow with many Tasks Task 1 Stream A Stream B Task 2 Stream C Stream D Task 3 Stream E Stream F Task 4 Stream B Stream D Stream G Task 6 Stream G Stream F Stream I Task 7 Sync Task 5 Stream G Stream H
20. Analysis: Dependency Graph Stage 0 Stage 1 Stage 2 Stage 3 Task 1 Stream A Task 4 Stream B Task 2 Stream C Task 3 Stream E Stream D Task 5 Stream G Task 6 Stream F Sync Task Stream H Stream I Sync Stream G
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