vpVideoWriter.cpp

/****************************************************************************
 *
 * $Id: vpImagePoint.h 2359 2009-11-24 15:09:25Z nmelchio $
 *
 * This file is part of the ViSP software.
 * Copyright (C) 2005 - 2012 by INRIA. All rights reserved.
 * 
 * This software is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * ("GPL") version 2 as published by the Free Software Foundation.
 * See the file LICENSE.txt at the root directory of this source
 * distribution for additional information about the GNU GPL.
 *
 * For using ViSP with software that can not be combined with the GNU
 * GPL, please contact INRIA about acquiring a ViSP Professional 
 * Edition License.
 *
 * See http://www.irisa.fr/lagadic/visp/visp.html for more information.
 * 
 * This software was developed at:
 * INRIA Rennes - Bretagne Atlantique
 * Campus Universitaire de Beaulieu
 * 35042 Rennes Cedex
 * France
 * http://www.irisa.fr/lagadic
 *
 * If you have questions regarding the use of this file, please contact
 * INRIA at visp@inria.fr
 * 
 * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
 * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 *
 * Description:
 * Write image sequences.
 *
 * Authors:
 * Nicolas Melchior
 * Fabien Spindler
 *
 *****************************************************************************/

#include <visp/vpDebug.h>
#include <visp/vpVideoWriter.h>

vpVideoWriter::vpVideoWriter()
{
  initFileName = false;
  firstFrame = 0;
  frameCount = 0;
  
  #ifdef VISP_HAVE_FFMPEG
  ffmpeg = NULL;
  codec = CODEC_ID_MPEG1VIDEO;
  bit_rate = 500000;
  #endif
}


vpVideoWriter::~vpVideoWriter()
{
  #ifdef VISP_HAVE_FFMPEG
  if (ffmpeg != NULL)
    delete ffmpeg;
  #endif
}


void vpVideoWriter::setFileName(const char *filename)
{
  if (filename == '\0')
  {
    vpERROR_TRACE("filename empty ") ;
    throw (vpImageException(vpImageException::noFileNameError,"filename empty ")) ;
  }
  
  strcpy(this->fileName,filename);
  
  formatType = getFormat(fileName);
  
  initFileName = true;
}


void vpVideoWriter::open(vpImage< vpRGBa > &I)
{
  if (!initFileName)
  {
    vpERROR_TRACE("The generic filename has to be set");
    throw (vpImageException(vpImageException::noFileNameError,"filename empty"));
  }
  
  if (formatType == FORMAT_PGM ||
      formatType == FORMAT_PPM ||
      formatType == FORMAT_JPEG ||
      formatType == FORMAT_PNG)
  {
    width = I.getWidth();
    height = I.getHeight();
  }
  #ifdef VISP_HAVE_FFMPEG
  else if (formatType == FORMAT_AVI ||
           formatType == FORMAT_MPEG ||
           formatType == FORMAT_MOV)
  {
    ffmpeg = new vpFFMPEG;
    ffmpeg->setBitRate(bit_rate);
    if(!ffmpeg->openEncoder(fileName, I.getWidth(), I.getHeight(), codec))
      throw (vpException(vpException::ioError ,"Could not open the video"));
  }
  
  #else
  else if (formatType == FORMAT_AVI ||
           formatType == FORMAT_MPEG ||
           formatType == FORMAT_MOV)
  {
    vpERROR_TRACE("To write video files the FFmpeg library has to be installed");
    throw (vpException(vpException::fatalError ,"the FFmpeg library is required"));
  }
  #endif
  
  frameCount = firstFrame;
  
  isOpen = true;
}


void vpVideoWriter::open(vpImage< unsigned char > &I)
{
  if (!initFileName)
  {
    vpERROR_TRACE("The generic filename has to be set");
    throw (vpImageException(vpImageException::noFileNameError,"filename empty"));
  }
  
  if (formatType == FORMAT_PGM ||
      formatType == FORMAT_PPM ||
      formatType == FORMAT_JPEG ||
      formatType == FORMAT_PNG)
  {
    width = I.getWidth();
    height = I.getHeight();
  }
  #ifdef VISP_HAVE_FFMPEG
  else if (formatType == FORMAT_AVI ||
           formatType == FORMAT_MPEG ||
           formatType == FORMAT_MOV)
  {
    ffmpeg = new vpFFMPEG;
    ffmpeg->setBitRate(bit_rate);
    if(!ffmpeg->openEncoder(fileName, I.getWidth(), I.getHeight(), codec))
      throw (vpException(vpException::ioError ,"Could not open the video"));
  }
  
  #else
  else if (formatType == FORMAT_AVI ||
           formatType == FORMAT_MPEG ||
           formatType == FORMAT_MOV)
  {
    vpERROR_TRACE("To write video files the FFmpeg library has to be installed");
    throw (vpException(vpException::fatalError ,"the FFmpeg library is required"));
  }
  #endif
  
  frameCount = firstFrame;
  
  isOpen = true;
}


void vpVideoWriter::saveFrame (vpImage< vpRGBa > &I)
{
  if (!isOpen)
  {
    vpERROR_TRACE("The video has to be open first with the open method");
    throw (vpException(vpException::notInitialized,"file not yet opened"));
  }

  
  if (formatType == FORMAT_PGM ||
      formatType == FORMAT_PPM ||
      formatType == FORMAT_JPEG ||
      formatType == FORMAT_PNG)
  {
    char name[FILENAME_MAX];

    sprintf(name,fileName,frameCount);

    vpImageIo::write(I, name);
  }
  
  #ifdef VISP_HAVE_FFMPEG
  else
  {
    ffmpeg->saveFrame(I);
  }
  #endif

  frameCount++;
}


void vpVideoWriter::saveFrame (vpImage< unsigned char > &I)
{
  if (!isOpen)
  {
    vpERROR_TRACE("The video has to be open first with the open method");
    throw (vpException(vpException::notInitialized,"file not yet opened"));
  }

  if (formatType == FORMAT_PGM ||
      formatType == FORMAT_PPM ||
      formatType == FORMAT_JPEG ||
      formatType == FORMAT_PNG)
  {
    char name[FILENAME_MAX];

    sprintf(name,fileName,frameCount);

    vpImageIo::write(I, name);
  }
  
  #ifdef VISP_HAVE_FFMPEG
  else
  {
    ffmpeg->saveFrame(I);
  }
  #endif

  frameCount++;
}


void vpVideoWriter::close()
{
  if (!isOpen)
  {
    vpERROR_TRACE("The video has to be open first with the open method");
    throw (vpException(vpException::notInitialized,"file not yet opened"));
  }
  #ifdef VISP_HAVE_FFMPEG
  if (ffmpeg != NULL)
  {
    ffmpeg->endWrite();
  }
  #endif
}


vpVideoWriter::vpVideoFormatType
vpVideoWriter::getFormat(const char *filename)
{
  std::string sfilename(filename);

  std::string ext = vpVideoWriter::getExtension(sfilename);

  if (ext.compare(".PGM") == 0)
    return FORMAT_PGM;
  else if (ext.compare(".pgm") == 0)
    return FORMAT_PGM;
  else if (ext.compare(".PPM") == 0)
    return FORMAT_PPM;
  else if (ext.compare(".ppm") == 0)
    return FORMAT_PPM;
  else if (ext.compare(".JPG") == 0)
    return FORMAT_JPEG;
  else if (ext.compare(".jpg") == 0)
    return FORMAT_JPEG;
  else if (ext.compare(".JPEG") == 0)
    return FORMAT_JPEG;
  else if (ext.compare(".jpeg") == 0)
    return FORMAT_JPEG;
  else if (ext.compare(".PNG") == 0)
    return FORMAT_PNG;
  else if (ext.compare(".png") == 0)
    return FORMAT_PNG;
  else if (ext.compare(".AVI") == 0)
    return FORMAT_AVI;
  else if (ext.compare(".avi") == 0)
    return FORMAT_AVI;
  else if (ext.compare(".MPEG") == 0)
    return FORMAT_MPEG;
  else if (ext.compare(".mpeg") == 0)
    return FORMAT_MPEG;
  else if (ext.compare(".MPG") == 0)
    return FORMAT_MPEG;
  else if (ext.compare(".mpg") == 0)
    return FORMAT_MPEG;
  else if (ext.compare(".MOV") == 0)
    return FORMAT_MOV;
  else if (ext.compare(".mov") == 0)
    return FORMAT_MOV;
  else
    return FORMAT_UNKNOWN;
}

// return the extension of the file including the dot
std::string vpVideoWriter::getExtension(const std::string &filename)
{
  // extract the extension
  size_t dot = filename.find_last_of(".");
  std::string ext = filename.substr(dot, filename.size()-1);
  return ext;
}