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/*=========================================================================
*
* Copyright NumFOCUS
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
#include <iostream>
#include "itkDecimateFramesVideoFilter.h"
#include "itkVideoFileReader.h"
#include "itkVideoFileWriter.h"
#include "itkFileListVideoIOFactory.h"
#include "itkFileListVideoIO.h"
#include "itkImageFileReader.h"
#include "itkImageRegionConstIterator.h"
#include "itkTestingMacros.h"
// type alias
constexpr unsigned int Dimension = 2;
using PixelType = unsigned char;
using FrameType = itk::Image<PixelType, Dimension>;
using VideoType = itk::VideoStream<FrameType>;
using FilterType = itk::DecimateFramesVideoFilter<VideoType>;
using ReaderType = itk::VideoFileReader<VideoType>;
using WriterType = itk::VideoFileWriter<VideoType>;
namespace itk
{
namespace DecimateFramesVideoFilterTest
{
/**
* Compare two images pixel by pixel
*/
bool
FramesAreEqual(const FrameType * f1, const FrameType * f2)
{
using IterType = ImageRegionConstIterator<FrameType>;
IterType it1(f1, f1->GetLargestPossibleRegion());
IterType it2(f2, f2->GetLargestPossibleRegion());
while (!it1.IsAtEnd())
{
if (it1.Get() != it2.Get())
{
return false;
}
++it1;
++it2;
}
return true;
}
} // namespace DecimateFramesVideoFilterTest
} // namespace itk
/**
* Main test
*/
int
itkDecimateFramesVideoFilterTest(int argc, char * argv[])
{
//////
// Check Arguments
//////
if (argc < 3)
{
std::cout << "Usage: " << itkNameOfTestExecutableMacro(argv) << " input_file_string output_file_string"
<< std::endl;
return EXIT_FAILURE;
}
//////
// Set up pipeline
//////
// Instantiate reader, writer, and filter
auto reader = ReaderType::New();
auto writer = WriterType::New();
auto filter = FilterType::New();
ITK_EXERCISE_BASIC_OBJECT_METHODS(filter, DecimateFramesVideoFilter, VideoToVideoFilter);
// Connect the pipeline
filter->SetInput(reader->GetOutput());
writer->SetInput(filter->GetOutput());
// Set the filenames on the reader/writer
reader->SetFileName(argv[1]);
writer->SetFileName(argv[2]);
// Keep every 3rd frame
filter->SetPreservedFrameSpacing(3);
//////
// Run the pipeline
//////
// Register FileListVideoIO with the factory -- shouldn't have to do this. Needs fixing
itk::ObjectFactoryBase::RegisterFactory(itk::FileListVideoIOFactory::New());
// For the sake of debugging output, just use one thread
filter->SetNumberOfWorkUnits(1);
// Update the writer to run everything
writer->Update();
//////
// Check the results
//////
// Get the list of files for input and output
std::vector<std::string> inputFiles = itk::FileListVideoIO::SplitFileNames(argv[1]);
std::vector<std::string> outputFiles = itk::FileListVideoIO::SplitFileNames(argv[2]);
// Set up two readers to read in the frames that should have been written and
// compare against those that actually were
using FrameReaderType = itk::ImageFileReader<FrameType>;
auto inputFrameReader = FrameReaderType::New();
auto outputFrameReader = FrameReaderType::New();
// Compare input frame 0 and output frame 0
inputFrameReader->SetFileName(inputFiles[0]);
inputFrameReader->Update();
outputFrameReader->SetFileName(outputFiles[0]);
outputFrameReader->Update();
if (!itk::DecimateFramesVideoFilterTest::FramesAreEqual(inputFrameReader->GetOutput(),
outputFrameReader->GetOutput()))
{
std::cerr << "Input frame 0 and output frame 0 don't match" << std::endl;
return EXIT_FAILURE;
}
// Compare input frame 3 and output frame 1
inputFrameReader->SetFileName(inputFiles[3]);
inputFrameReader->Update();
outputFrameReader->SetFileName(outputFiles[1]);
outputFrameReader->Update();
if (!itk::DecimateFramesVideoFilterTest::FramesAreEqual(inputFrameReader->GetOutput(),
outputFrameReader->GetOutput()))
{
std::cerr << "Input frame 3 and output frame 1 don't match" << std::endl;
return EXIT_FAILURE;
}
//////
// Return successfully
//////
return EXIT_SUCCESS;
}
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