itkOpenCVVideoIO.h

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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 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 ITKVideoBridgeOpenCV_EXPORT OpenCVVideoIO : public VideoIOBase
{
public:
  ITK_DISALLOW_COPY_AND_ASSIGN(OpenCVVideoIO);

  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;

  itkNewMacro(Self);

  itkTypeMacro(OpenCVVideoIO, Superclass);

  virtual void FinishReadingOrWriting();

  //
  // Data reading-related methods
  //

  virtual void SetReadFromFile();

  virtual void SetReadFromCamera();

  virtual bool CanReadFile(const char *);

  virtual bool CanReadCamera( CameraIDType cameraID ) const;

  virtual void ReadImageInformation();

  virtual void Read(void *buffer);

  virtual bool SetNextFrameToRead( FrameOffsetType frameNumber );

  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
  //

  virtual void SetCameraIndex(CameraIDType idx);
  virtual CameraIDType GetCameraIndex() const;

  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); }

  virtual bool CanWriteFile(const char *);

  virtual void WriteImageInformation();

  virtual void Write(const void *buffer);

  virtual void SetWriterParameters( TemporalRatioType fps,
                                    const std::vector<SizeValueType>& dim,
                                    const char* fourCC,
                                    unsigned int nChannels,
                                    IOComponentType componentType );

protected:
  OpenCVVideoIO();
  ~OpenCVVideoIO();

  void PrintSelf(std::ostream & os, Indent indent) const override;

  void UpdateReaderProperties();

  void ResetMembers();

  void OpenReader();

  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