/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
 *
 * This application is open source and may be redistributed and/or modified
 * freely and without restriction, both in commericial and non commericial applications,
 * as long as this copyright notice is maintained.
 *
 * This application is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*/
/*   -*-c++-*-
 *
 * Copyright (C) 2009 Cedric Pinson
 *
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA.
 *
 * Authors:
 *  Cedric Pinson <cedric.pinson@plopbyte.net>
 *
 */

#pragma once

#include <osg/Camera>

// fwd decl for gstreamer objects
struct _GstElement;

namespace VCtrl
{

class WindowCaptureCallback : public osg::Camera::DrawCallback
{
public:
  struct ContextData : public osg::Referenced
  {
    ContextData(osg::GraphicsContext *gc, GLenum readBuffer, const std::string &path, int w, int h, int framerate, int quality);
    ~ContextData();

    static void getSize(osg::GraphicsContext *gc, int &width, int &height);

    void read();

    osg::GraphicsContext   *_gc;
    GLenum                  _readBuffer;
    std::string             _fileName;

    int                     _width;
    int                     _height;

    std::vector< GLuint >   _pboBuffer;

    osg::Timer_t            _previousFrameTick;
    osg::Timer_t            _startTick;
    _GstElement *_pipeline;
    _GstElement *_app_source;
  };

  WindowCaptureCallback(GLenum readBuffer, unsigned int contextid, const std::string &path, int w, int h, int framerate, int quality);
  ~WindowCaptureCallback() = default;

  ContextData *createContextData(osg::GraphicsContext *gc) const;
  ContextData *getContextData(osg::GraphicsContext *gc) const;
  void operator()(osg::RenderInfo &renderInfo) const override;

  using ContextDataMap = std::map<osg::GraphicsContext *, osg::ref_ptr<ContextData> >;

  GLenum                      _readBuffer;
  unsigned int                _contextId;
  std::string                 _filename;
  int                         _w;
  int                         _h;
  int                         _framerate;
  int                         _quality;
  mutable ContextDataMap      _contextDataMap;
};

}