mirror of
https://github.com/opencv/opencv.git
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302 lines
10 KiB
C++
302 lines
10 KiB
C++
/*
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// A sample program demonstrating interoperability of OpenCV cv::UMat with Direct X surface
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// At first, the data obtained from video file or camera and placed onto Direct X surface,
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// following mapping of this Direct X surface to OpenCV cv::UMat and call cv::Blur function.
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// The result is mapped back to Direct X surface and rendered through Direct X API.
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*/
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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#include <d3d10.h>
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#include "opencv2/core.hpp"
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#include "opencv2/core/directx.hpp"
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#include "opencv2/core/ocl.hpp"
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#include "opencv2/imgproc.hpp"
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#include "opencv2/videoio.hpp"
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#include "d3dsample.hpp"
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#pragma comment (lib, "d3d10.lib")
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class D3D10WinApp : public D3DSample
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{
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public:
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D3D10WinApp(int width, int height, std::string& window_name, cv::VideoCapture& cap) :
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D3DSample(width, height, window_name, cap) {}
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~D3D10WinApp() {}
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int create(void)
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{
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// base initialization
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D3DSample::create();
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// initialize DirectX
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HRESULT r;
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DXGI_SWAP_CHAIN_DESC scd;
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ZeroMemory(&scd, sizeof(DXGI_SWAP_CHAIN_DESC));
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scd.BufferCount = 1; // one back buffer
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scd.BufferDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM; // use 32-bit color
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scd.BufferDesc.Width = m_width; // set the back buffer width
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scd.BufferDesc.Height = m_height; // set the back buffer height
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scd.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT; // how swap chain is to be used
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scd.OutputWindow = m_hWnd; // the window to be used
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scd.SampleDesc.Count = 1; // how many multisamples
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scd.Windowed = TRUE; // windowed/full-screen mode
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scd.SwapEffect = DXGI_SWAP_EFFECT_DISCARD;
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scd.Flags = DXGI_SWAP_CHAIN_FLAG_ALLOW_MODE_SWITCH; // allow full-screen switching
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r = ::D3D10CreateDeviceAndSwapChain(
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NULL,
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D3D10_DRIVER_TYPE_HARDWARE,
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NULL,
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0,
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D3D10_SDK_VERSION,
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&scd,
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&m_pD3D10SwapChain,
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&m_pD3D10Dev);
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if (FAILED(r))
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{
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return EXIT_FAILURE;
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}
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r = m_pD3D10SwapChain->GetBuffer(0, __uuidof(ID3D10Texture2D), (LPVOID*)&m_pBackBuffer);
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if (FAILED(r))
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{
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return EXIT_FAILURE;
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}
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r = m_pD3D10Dev->CreateRenderTargetView(m_pBackBuffer, NULL, &m_pRenderTarget);
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if (FAILED(r))
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{
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return EXIT_FAILURE;
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}
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m_pD3D10Dev->OMSetRenderTargets(1, &m_pRenderTarget, NULL);
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D3D10_VIEWPORT viewport;
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ZeroMemory(&viewport, sizeof(D3D10_VIEWPORT));
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viewport.Width = m_width;
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viewport.Height = m_height;
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viewport.MinDepth = 0.0f;
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viewport.MaxDepth = 0.0f;
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m_pD3D10Dev->RSSetViewports(1, &viewport);
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D3D10_TEXTURE2D_DESC desc = { 0 };
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desc.Width = m_width;
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desc.Height = m_height;
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desc.MipLevels = 1;
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desc.ArraySize = 1;
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desc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
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desc.SampleDesc.Count = 1;
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desc.BindFlags = D3D10_BIND_SHADER_RESOURCE;
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desc.Usage = D3D10_USAGE_DYNAMIC;
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desc.CPUAccessFlags = D3D10_CPU_ACCESS_WRITE;
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r = m_pD3D10Dev->CreateTexture2D(&desc, NULL, &m_pSurface);
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if (FAILED(r))
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{
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std::cerr << "Can't create texture with input image" << std::endl;
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return EXIT_FAILURE;
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}
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// initialize OpenCL context of OpenCV lib from DirectX
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if (cv::ocl::haveOpenCL())
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{
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m_oclCtx = cv::directx::ocl::initializeContextFromD3D10Device(m_pD3D10Dev);
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}
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m_oclDevName = cv::ocl::useOpenCL() ?
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cv::ocl::Context::getDefault().device(0).name() :
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"No OpenCL device";
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return EXIT_SUCCESS;
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} // create()
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// get media data on DX surface for further processing
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int get_surface(ID3D10Texture2D** ppSurface)
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{
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HRESULT r;
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if (!m_cap.read(m_frame_bgr))
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return EXIT_FAILURE;
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cv::cvtColor(m_frame_bgr, m_frame_rgba, cv::COLOR_BGR2RGBA);
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UINT subResource = ::D3D10CalcSubresource(0, 0, 1);
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D3D10_MAPPED_TEXTURE2D mappedTex;
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r = m_pSurface->Map(subResource, D3D10_MAP_WRITE_DISCARD, 0, &mappedTex);
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if (FAILED(r))
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{
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return r;
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}
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cv::Mat m(m_height, m_width, CV_8UC4, mappedTex.pData, (int)mappedTex.RowPitch);
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// copy video frame data to surface
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m_frame_rgba.copyTo(m);
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m_pSurface->Unmap(subResource);
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*ppSurface = m_pSurface;
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return EXIT_SUCCESS;
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} // get_surface()
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// process and render media data
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int render()
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{
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try
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{
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if (m_shutdown)
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return EXIT_SUCCESS;
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// capture user input once
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MODE mode = (m_mode == MODE_GPU_NV12) ? MODE_GPU_RGBA : m_mode;
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HRESULT r;
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ID3D10Texture2D* pSurface;
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r = get_surface(&pSurface);
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if (FAILED(r))
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{
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return EXIT_FAILURE;
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}
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m_timer.reset();
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m_timer.start();
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switch (mode)
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{
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case MODE_CPU:
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{
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// process video frame on CPU
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UINT subResource = ::D3D10CalcSubresource(0, 0, 1);
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D3D10_MAPPED_TEXTURE2D mappedTex;
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r = pSurface->Map(subResource, D3D10_MAP_WRITE_DISCARD, 0, &mappedTex);
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if (FAILED(r))
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{
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return r;
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}
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cv::Mat m(m_height, m_width, CV_8UC4, mappedTex.pData, (int)mappedTex.RowPitch);
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if (m_demo_processing)
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{
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// blur D3D10 surface with OpenCV on CPU
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cv::blur(m, m, cv::Size(15, 15));
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}
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m_timer.stop();
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cv::String strMode = cv::format("mode: %s", m_modeStr[MODE_CPU].c_str());
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cv::String strProcessing = m_demo_processing ? "blur frame" : "copy frame";
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cv::String strTime = cv::format("time: %4.3f msec", m_timer.getTimeMilli());
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cv::String strDevName = cv::format("OpenCL device: %s", m_oclDevName.c_str());
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cv::putText(m, strMode, cv::Point(0, 20), cv::FONT_HERSHEY_SIMPLEX, 0.8, cv::Scalar(0, 0, 200), 2);
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cv::putText(m, strProcessing, cv::Point(0, 40), cv::FONT_HERSHEY_SIMPLEX, 0.8, cv::Scalar(0, 0, 200), 2);
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cv::putText(m, strTime, cv::Point(0, 60), cv::FONT_HERSHEY_SIMPLEX, 0.8, cv::Scalar(0, 0, 200), 2);
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cv::putText(m, strDevName, cv::Point(0, 80), cv::FONT_HERSHEY_SIMPLEX, 0.8, cv::Scalar(0, 0, 200), 2);
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pSurface->Unmap(subResource);
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break;
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}
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case MODE_GPU_RGBA:
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{
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// process video frame on GPU
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cv::UMat u;
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cv::directx::convertFromD3D10Texture2D(pSurface, u);
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if (m_demo_processing)
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{
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// blur D3D10 surface with OpenCV on GPU with OpenCL
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cv::blur(u, u, cv::Size(15, 15));
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}
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m_timer.stop();
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cv::String strMode = cv::format("mode: %s", m_modeStr[MODE_GPU_RGBA].c_str());
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cv::String strProcessing = m_demo_processing ? "blur frame" : "copy frame";
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cv::String strTime = cv::format("time: %4.3f msec", m_timer.getTimeMilli());
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cv::String strDevName = cv::format("OpenCL device: %s", m_oclDevName.c_str());
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cv::putText(u, strMode, cv::Point(0, 20), cv::FONT_HERSHEY_SIMPLEX, 0.8, cv::Scalar(0, 0, 200), 2);
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cv::putText(u, strProcessing, cv::Point(0, 40), cv::FONT_HERSHEY_SIMPLEX, 0.8, cv::Scalar(0, 0, 200), 2);
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cv::putText(u, strTime, cv::Point(0, 60), cv::FONT_HERSHEY_SIMPLEX, 0.8, cv::Scalar(0, 0, 200), 2);
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cv::putText(u, strDevName, cv::Point(0, 80), cv::FONT_HERSHEY_SIMPLEX, 0.8, cv::Scalar(0, 0, 200), 2);
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cv::directx::convertToD3D10Texture2D(u, pSurface);
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break;
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}
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} // switch
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// traditional DX render pipeline:
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// BitBlt surface to backBuffer and flip backBuffer to frontBuffer
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m_pD3D10Dev->CopyResource(m_pBackBuffer, pSurface);
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// present the back buffer contents to the display
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// switch the back buffer and the front buffer
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r = m_pD3D10SwapChain->Present(0, 0);
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if (FAILED(r))
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{
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return EXIT_FAILURE;
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}
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} // try
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catch (const cv::Exception& e)
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{
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std::cerr << "Exception: " << e.what() << std::endl;
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return 10;
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}
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return EXIT_SUCCESS;
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} // render()
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int cleanup(void)
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{
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SAFE_RELEASE(m_pSurface);
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SAFE_RELEASE(m_pBackBuffer);
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SAFE_RELEASE(m_pD3D10SwapChain);
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SAFE_RELEASE(m_pRenderTarget);
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SAFE_RELEASE(m_pD3D10Dev);
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D3DSample::cleanup();
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return EXIT_SUCCESS;
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} // cleanup()
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private:
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ID3D10Device* m_pD3D10Dev;
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IDXGISwapChain* m_pD3D10SwapChain;
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ID3D10Texture2D* m_pBackBuffer;
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ID3D10Texture2D* m_pSurface;
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ID3D10RenderTargetView* m_pRenderTarget;
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cv::ocl::Context m_oclCtx;
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cv::String m_oclPlatformName;
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cv::String m_oclDevName;
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};
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// main func
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int main(int argc, char** argv)
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{
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std::string title = "D3D10 interop sample";
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return d3d_app<D3D10WinApp>(argc, argv, title);
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}
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