text: /*M///////////////////////////////////////////////////////////////////////////////////////
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  //                           License Agreement
  //                For Open Source Computer Vision Library
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  //M*/
  
  #include "perf_precomp.hpp"
  #include "opencv2/highgui/highgui_c.h"
  #include "opencv2/videoio/videoio_c.h"
  
  namespace opencv_test { namespace {
  
  #if defined(HAVE_NVCUVID)
  
  #if defined(HAVE_FFMPEG_WRAPPER) // should this be set in preprocessor or in cvconfig.h
  #define VIDEO_SRC Values("gpu/video/768x576.avi", "gpu/video/1920x1080.avi")
  #else
  // CUDA demuxer has to fall back to ffmpeg to process "gpu/video/768x576.avi"
  #define VIDEO_SRC Values( "gpu/video/1920x1080.avi")
  #endif
  
  DEF_PARAM_TEST_1(FileName, string);
  
  //////////////////////////////////////////////////////
  // VideoReader
  
  PERF_TEST_P(FileName, VideoReader, VIDEO_SRC)
  {
      declare.time(20);
  
      const string inputFile = perf::TestBase::getDataPath(GetParam());
  
      if (PERF_RUN_CUDA())
      {
          cv::Ptr<cv::cudacodec::VideoReader> d_reader = cv::cudacodec::createVideoReader(inputFile);
  
          cv::cuda::GpuMat frame;
  
          TEST_CYCLE_N(10) d_reader->nextFrame(frame);
  
          CUDA_SANITY_CHECK(frame);
      }
      else
      {
          cv::VideoCapture reader(inputFile);
          ASSERT_TRUE( reader.isOpened() );
  
          cv::Mat frame;
  
          TEST_CYCLE_N(10) reader >> frame;
  
          CPU_SANITY_CHECK(frame);
      }
  }
  
  #endif
  
  //////////////////////////////////////////////////////
  // VideoWriter
  
  #if defined(HAVE_NVCUVID) && defined(_WIN32)
  
  PERF_TEST_P(FileName, VideoWriter, VIDEO_SRC)
  {
      declare.time(30);
  
      const string inputFile = perf::TestBase::getDataPath(GetParam());
      const string outputFile = cv::tempfile(".avi");
  
      const double FPS = 25.0;
  
      cv::VideoCapture reader(inputFile);
      ASSERT_TRUE( reader.isOpened() );
  
      cv::Mat frame;
  
      if (PERF_RUN_CUDA())
      {
          cv::Ptr<cv::cudacodec::VideoWriter> d_writer;
  
          cv::cuda::GpuMat d_frame;
  
          for (int i = 0; i < 10; ++i)
          {
              reader >> frame;
              ASSERT_FALSE(frame.empty());
  
              d_frame.upload(frame);
  
              if (d_writer.empty())
                  d_writer = cv::cudacodec::createVideoWriter(outputFile, frame.size(), FPS);
  
              startTimer(); next();
              d_writer->write(d_frame);
              stopTimer();
          }
      }
      else
      {
          cv::VideoWriter writer;
  
          for (int i = 0; i < 10; ++i)
          {
              reader >> frame;
              ASSERT_FALSE(frame.empty());
  
              if (!writer.isOpened())
                  writer.open(outputFile, CV_FOURCC('X', 'V', 'I', 'D'), FPS, frame.size());
  
              startTimer(); next();
              writer.write(frame);
              stopTimer();
          }
      }
  
      SANITY_CHECK(frame);
  }
  
  #endif
  }} // namespace
  