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/*=========================================================================
*
* Copyright Insight Software Consortium
*
* 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
*
* http://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.
*
*=========================================================================*/
#ifndef itkDecimateFramesVideoFilter_h
#define itkDecimateFramesVideoFilter_h
#include "itkVideoToVideoFilter.h"
namespace itk
{
/** \class DecimateFramesVideoFilter
* \brief Reduce a video's frame-rate by keeping every Nth frame
*
* This filter simply takes an input video and passes every Nth frame through
* to the output.
*
* \ingroup ITKVideoFiltering
*/
template<typename TVideoStream>
class ITK_TEMPLATE_EXPORT DecimateFramesVideoFilter :
public VideoToVideoFilter<TVideoStream, TVideoStream>
{
public:
/** Standard class typedefs */
typedef TVideoStream VideoStreamType;
typedef TVideoStream InputVideoStreamType;
typedef TVideoStream OutputVideoStreamType;
typedef DecimateFramesVideoFilter< VideoStreamType > Self;
typedef VideoToVideoFilter< VideoStreamType,
VideoStreamType > Superclass;
typedef SmartPointer< Self > Pointer;
typedef SmartPointer< const Self > ConstPointer;
typedef WeakPointer< const Self > ConstWeakPointer;
typedef typename TVideoStream::FrameType FrameType;
typedef typename FrameType::PixelType PixelType;
typedef typename FrameType::RegionType FrameSpatialRegionType;
itkNewMacro(Self);
itkTypeMacro(DecimateFramesVideoFilter, VideoToVideoFilter);
/** Get/Set the spacing of the preserved frames */
void SetPreservedFrameSpacing(SizeValueType numFrames);
SizeValueType GetPreservedFrameSpacing();
protected:
/** Constructor and Destructor */
DecimateFramesVideoFilter();
virtual ~DecimateFramesVideoFilter() ITK_OVERRIDE {}
/** PrintSelf */
virtual void PrintSelf(std::ostream & os, Indent indent) const ITK_OVERRIDE;
/** DecimateFramesVideoFilter is implemented as a temporal streaming and
* spatially multithreaded filter, so we override ThreadedGenerateData */
virtual void ThreadedGenerateData(
const FrameSpatialRegionType& outputRegionForThread,
int threadId) ITK_OVERRIDE;
private:
ITK_DISALLOW_COPY_AND_ASSIGN(DecimateFramesVideoFilter);
}; // end class DecimateFramesVideoFilter
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkDecimateFramesVideoFilter.hxx"
#endif
#endif
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