mitkMovieGeneratorOpenCV.cpp

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/*============================================================================

The Medical Imaging Interaction Toolkit (MITK)

Copyright (c) German Cancer Research Center (DKFZ)
All rights reserved.

Use of this source code is governed by a 3-clause BSD license that can be
found in the LICENSE file.

============================================================================*/

#include "mitkMovieGeneratorOpenCV.h"
//#include <GL/gl.h>
#include "mitkGL.h"
#include <iostream>


mitk::MovieGeneratorOpenCV::MovieGeneratorOpenCV()
{
  m_initialized = false;
  m_aviWriter   = nullptr;
  m_dwRate = 20;

  m_FourCCCodec = nullptr;
  m_RemoveColouredFrame = true;
}


void mitk::MovieGeneratorOpenCV::SetFileName( const char *fileName )
{

  m_sFile = fileName;
}

void mitk::MovieGeneratorOpenCV::SetFrameRate(unsigned int rate)
{
  m_dwRate = static_cast<int>(rate);
}

void mitk::MovieGeneratorOpenCV::SetRemoveColouredFrame(bool RemoveColouredFrame)
{
  m_RemoveColouredFrame = RemoveColouredFrame;
}

bool mitk::MovieGeneratorOpenCV::InitGenerator()
{
  m_width = m_renderer->GetRenderWindow()->GetSize()[0];  // changed from glGetIntegerv( GL_VIEWPORT, viewport );
  m_height = m_renderer->GetRenderWindow()->GetSize()[1]; // due to sometimes strange dimensions

  if(m_RemoveColouredFrame)
  {
    m_width  -= 10;  //remove colored boarders around renderwindows
    m_height -= 10;
  }

  m_width -= m_width % 4; // some video codecs have prerequisites to the image dimensions
  m_height -= m_height % 4;

  m_currentFrame = cvCreateImage(cvSize(m_width,m_height),8,3); // creating image with widget size, 8 bit per pixel and 3 channel r,g,b
  m_currentFrame->origin = 1; // avoid building a video with bottom up

  /*
  m_sFile = Name of the output video file.
  CV_FOURCC = 4-character code of codec used to compress the frames. For example, CV_FOURCC('P','I','M','1') is MPEG-1 codec,
  CV_FOURCC('M','J','P','G') is motion-jpeg codec etc.
   CV_FOURCC('P','I','M','1')    = MPEG-1 codec
  CV_FOURCC('M','J','P','G')    = motion-jpeg codec (does not work well)
  CV_FOURCC('M', 'P', '4', '2') = MPEG-4.2 codec
  CV_FOURCC('D', 'I', 'V', '3') = MPEG-4.3 codec
  CV_FOURCC('D', 'I', 'V', 'X') = MPEG-4 codec
  CV_FOURCC('U', '2', '6', '3') = H263 codec
  CV_FOURCC('I', '2', '6', '3') = H263I codec
  CV_FOURCC('F', 'L', 'V', '1') = FLV1 codec

  List of FOURCC codes is available at http://msdn2.microsoft.com/en-us/library/ms867195.aspx

  Under Win32 it is possible to pass -1 in order to choose compression
  method and additional compression parameters from dialog.
  m_dwRate = Framerate of the created video stream.
  frame_size Size of video frames. InitGenerator
  1 = If it is not zero, the encoder will expect and encode color frames, otherwise it will work with grayscale frames
  (the flag is currently supported on Windows only).*/

  if(m_FourCCCodec != nullptr)
  {
    #ifdef WIN32
      m_aviWriter = cvCreateVideoWriter(m_sFile.c_str(),CV_FOURCC(m_FourCCCodec[0],m_FourCCCodec[1],m_FourCCCodec[2],
                                        m_FourCCCodec[3]),m_dwRate,cvSize(m_width,m_height),1); //initializing video writer
    #else
      m_aviWriter = cvCreateVideoWriter(m_sFile.c_str(),CV_FOURCC(m_FourCCCodec[0],m_FourCCCodec[1],m_FourCCCodec[2],
                                        m_FourCCCodec[3]),m_dwRate,cvSize(m_width,m_height)); //initializing video writer
    #endif
  }
  else
  {
    #ifdef WIN32
      m_aviWriter = cvCreateVideoWriter(m_sFile.c_str(),-1,m_dwRate,cvSize(m_width,m_height),1); //initializing video writer
    #else
      m_aviWriter = cvCreateVideoWriter(m_sFile.c_str(),CV_FOURCC('X','V','I','D'),m_dwRate,cvSize(m_width,m_height)); //initializing video writer
    #endif
  }


  if(!m_aviWriter)
  {
    std::cout << "errors initializing video writer...correct video file path? on linux: ffmpeg must be included in OpenCV.";
    return false;
  }

  return true;
}


bool mitk::MovieGeneratorOpenCV::AddFrame( void *data )
{
  //cvSetImageData(m_currentFrame,data,m_width*3);
  memcpy(m_currentFrame->imageData,data,m_width*m_height*3);
  cvWriteFrame(m_aviWriter,m_currentFrame);
  return true;
}


bool mitk::MovieGeneratorOpenCV::TerminateGenerator()
{
  if (m_aviWriter)
  {
    cvReleaseVideoWriter(&m_aviWriter);
  }
  return true;
}