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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.
*
*=========================================================================*/
#ifndef itkOpenCVVideoIO_h
#define itkOpenCVVideoIO_h
#include "itkVideoIOBase.h"
#include "opencv2/core/version.hpp"
#if !defined(CV_VERSION_EPOCH)
// OpenCV 3.x
# include "opencv2/videoio/videoio.hpp"
# include "opencv2/videoio/videoio_c.h"
# include "opencv2/imgproc/imgproc_c.h"
#else
// OpenCV 2.4.x
# include "cv.h"
# include "highgui.h"
#endif
#include "ITKVideoBridgeOpenCVExport.h"
namespace itk
{
/**
* \class OpenCVVideoIO
*
* \brief VideoIO object for reading and writing videos using OpenCV
*
* \ingroup ITKVideoBridgeOpenCV
*/
class ITKVideoBridgeOpenCV_EXPORT OpenCVVideoIO : public VideoIOBase
{
public:
ITK_DISALLOW_COPY_AND_MOVE(OpenCVVideoIO);
/** Standard class type aliases. */
using Self = OpenCVVideoIO;
using Superclass = VideoIOBase;
using Pointer = SmartPointer<Self>;
using TemporalOffsetType = Superclass::TemporalOffsetType;
using FrameOffsetType = Superclass::FrameOffsetType;
using TemporalRatioType = Superclass::TemporalRatioType;
using CameraIDType = Superclass::CameraIDType;
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** \see LightObject::GetNameOfClass() */
itkOverrideGetNameOfClassMacro(OpenCVVideoIO);
/** Close the reader and writer and reset members */
virtual void
FinishReadingOrWriting();
//
// Data reading-related methods
//
/** Set to reading from file */
virtual void
SetReadFromFile();
/** Set to reading from a camera */
virtual void
SetReadFromCamera();
/** Determine the file type. Returns true if this ImageIO can read the
* file specified. */
virtual bool
CanReadFile(const char *);
/** Return whether or not the VideoIO can read from a camera */
virtual bool
CanReadCamera(CameraIDType cameraID) const;
/** Set the spacing and dimension information for the set filename. */
virtual void
ReadImageInformation();
/** Reads the data from disk into the memory buffer provided. */
virtual void
Read(void * buffer);
/** Set the next frame that should be read. Return true if you operation
* successful. */
virtual bool
SetNextFrameToRead(FrameOffsetType frameNumber);
/** Virtual accessor functions to be implemented in each derived class. */
virtual TemporalOffsetType
GetPositionInMSec() const;
virtual TemporalRatioType
GetRatio() const;
virtual FrameOffsetType
GetFrameTotal() const;
virtual TemporalRatioType
GetFramesPerSecond() const;
virtual FrameOffsetType
GetCurrentFrame() const;
virtual FrameOffsetType
GetIFrameInterval() const;
virtual FrameOffsetType
GetLastIFrame() const;
//
// Data writing-related methods
//
/** Get/Set the device index for reading from a camera. */
virtual void
SetCameraIndex(CameraIDType idx);
virtual CameraIDType
GetCameraIndex() const;
/** Override Accessors to pass default values since OpenCV doesn't handle
* this type of meta data. */
virtual double
GetSpacing(unsigned int itkNotUsed(i)) const
{
return 1.0;
}
virtual double
GetOrigin(unsigned int itkNotUsed(i)) const
{
return 0.0;
}
virtual std::vector<double>
GetDirection(unsigned int i) const
{
return this->GetDefaultDirection(i);
}
/** Determine the file type. Returns true if this ImageIO can write the
* file specified. */
virtual bool
CanWriteFile(const char *);
/** Writes the spacing and dimensions of the image.
* Assumes SetFileName has been called with a valid file name. */
virtual void
WriteImageInformation();
/** Writes the data to disk from the memory buffer provided. Make sure
* that the IORegion has been set properly. */
virtual void
Write(const void * buffer);
/** Set Writer parameters. */
virtual void
SetWriterParameters(TemporalRatioType fps,
const std::vector<SizeValueType> & dim,
const char * fourCC,
unsigned int nChannels,
IOComponentEnum componentType);
protected:
OpenCVVideoIO();
~OpenCVVideoIO();
void
PrintSelf(std::ostream & os, Indent indent) const override;
/** Update the local members from the internal capture. */
void
UpdateReaderProperties();
/** Reset member variables to empty state closed. */
void
ResetMembers();
/** Open the reader if the writer is not open. */
void
OpenReader();
/** Open the writer if the reader is not open. */
void
OpenWriter();
private:
private:
IplImage * m_CVImage{};
IplImage * m_TempImage{};
CvCapture * m_Capture{};
CvVideoWriter * m_Writer{};
int m_FourCC{};
int m_CameraIndex{};
};
} // end namespace itk
#endif // itkOpenCVVideoIO_h
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