/*
Software License :

Copyright (c) 2007, The Open Effects Association Ltd. All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

   * Redistributions of source code must retain the above copyright notice,
   this list of conditions and the following disclaimer.
   * Redistributions in binary form must reproduce the above copyright notice,
   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.
   * Neither the name The Open Effects Association Ltd, nor the names of its 
   contributors may be used to endorse or promote products derived from this
   software without specific prior written permission.
   
   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
   ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
   WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
   ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
   (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
   ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/


#include <iostream>
#include <fstream>
#include <cassert>

// ofx
#include "ofxCore.h"
#include "ofxImageEffect.h"
#include "ofxPixels.h"

// ofx host
#include "ofxhBinary.h"
#include "ofxhPropertySuite.h"
#include "ofxhClip.h"
#include "ofxhParam.h"
#include "ofxhMemory.h"
#include "ofxhImageEffect.h"
#include "ofxhPluginAPICache.h"
#include "ofxhPluginCache.h"
#include "ofxhHost.h"
#include "ofxhImageEffectAPI.h"

// my host
#include "hostDemoHostDescriptor.h"
#include "hostDemoEffectInstance.h"
#include "hostDemoClipInstance.h"
   
////////////////////////////////////////////////////////////////////////////////
// This example code can only work with the example 'invert' plugin built
// with the OFX C++ support library. With some programming you may be able to
// get it to work with another plug-in.
//
//
// It's job is purely to show you what functions you need to fill in to provide
// an OFX image effect plugin host. It is (as we say in England) a 'noddy' example.
// 
// Run this in a debugger and step through to see what it does. Also be sure to
// build the invert example and set OFX_PLUGIN_PATH so that it can see it.
//
// It works by hard coding progressive PAL SD imagery to input and output clips,
// the images are black going in (and should be white coming out of the plugin).
//
// There is no file io to work with this.

void exportToPPM(const std::string& fname, MyHost::MyImage* im)
{
  std::ofstream op(fname.c_str());
  OfxRectI rod = im->getROD();
  op << "P3" << "\t# FORMAT" << std::endl;
  op << rod.x2 - rod.x1 << "\t#WIDTH" << std::endl;
  op << rod.y2 - rod.y1 << "\t#HEIGHT" <<std::endl;
  //This assumes 8-bit.
  op << "255" << std::endl;
  for (int y = rod.y1; y< rod.y2; ++y)
  {
    for (int x = rod.x1; x < rod.x2; ++x)
    {
      OfxRGBAColourB* pix = im->pixel(x,y);
      if(pix)
        op << (int)pix->r << " " << (int)pix->g << " " << (int)pix->b << " " << std::endl;
      else
        op << "0 0 0" << std::endl;
    }
  }
}

int main(int argc, char **argv) 
{
  //_CrtSetBreakAlloc(3168);
#ifdef _WIN32
  _CrtSetDbgFlag ( _CRTDBG_ALLOC_MEM_DF | _CRTDBG_LEAK_CHECK_DF );
#endif
  // set the version label in the global cache
  OFX::Host::PluginCache::getPluginCache()->setCacheVersion("hostDemoV1");

  // create our derived image effect host which provides
  // a factory to make plugin instances and acts
  // as a description of the host application
  MyHost::Host myHost;

  // make an image effect plugin cache. This is what knows about
  // all the plugins.
  OFX::Host::ImageEffect::PluginCache imageEffectPluginCache(myHost);

  // register the image effect cache with the global plugin cache
  imageEffectPluginCache.registerInCache(*OFX::Host::PluginCache::getPluginCache());

  // try to read an old cache
  std::ifstream ifs("hostDemoPluginCache.xml");
  OFX::Host::PluginCache::getPluginCache()->readCache(ifs);
  OFX::Host::PluginCache::getPluginCache()->scanPluginFiles();
  ifs.close();

  /// flush out the current cache
  std::ofstream of("hostDemoPluginCache.xml");
  OFX::Host::PluginCache::getPluginCache()->writePluginCache(of);
  of.close();

  // get the invert example plugin which uses the OFX C++ support code
  OFX::Host::ImageEffect::ImageEffectPlugin* plugin = imageEffectPluginCache.getPluginById("net.sf.openfx:invertPlugin");

  imageEffectPluginCache.dumpToStdOut();

  if(plugin) {
    // create an instance of it as a filter
    // the first arg is the context, the second is client data we are allowed to pass down the call chain

    std::auto_ptr<OFX::Host::ImageEffect::Instance> instance(plugin->createInstance(kOfxImageEffectContextFilter, NULL));

    if(instance.get())
    {
        OfxStatus stat;

      // now we need to call the create instance action. Only call this once you have initialised all the params
      // and clips to their correct values. So if you are loading a saved plugin state, set up your params from
      // that state, _then_ call create instance.
      stat = instance->createInstanceAction();
      assert(stat == kOfxStatOK || stat == kOfxStatReplyDefault);

      // now we need to to call getClipPreferences on the instance so that it does the clip component/depth
      // logic and caches away the components and depth on each clip.
      bool ok = instance->getClipPreferences();
      assert(ok);
      
      // current render scale of 1
      OfxPointD renderScale;
      renderScale.x = renderScale.y = 1.0;

      // The render window is in pixel coordinates
      // ie: render scale and a PAR of not 1
      OfxRectI  renderWindow;
      renderWindow.x1 = renderWindow.y1 = 0;
      renderWindow.x2 = 720;
      renderWindow.y2 = 576;

      /// RoI is in canonical coords, 
      OfxRectD  regionOfInterest;
      regionOfInterest.x1 = regionOfInterest.y1 = 0;
      regionOfInterest.x2 = renderWindow.x2 * instance->getProjectPixelAspectRatio();
      regionOfInterest.y2 = 576;
      
      int numFramesToRender = OFXHOSTDEMOCLIPLENGTH;

      // say we are about to render a bunch of frames 
      stat = instance->beginRenderAction(0, numFramesToRender, 1.0, false, renderScale, /*sequential=*/true, /*interactive=*/false
                                         );
      assert(stat == kOfxStatOK || stat == kOfxStatReplyDefault);

      // get the output clip
      MyHost::MyClipInstance* outputClip = dynamic_cast<MyHost::MyClipInstance*>(instance->getClip("Output"));
      assert(outputClip);

      for(int t = 0; t <= numFramesToRender; ++t) 
      {
        // call get region of interest on each of the inputs
        OfxTime frame = t;

        // get the RoI for each input clip
        // the regions of interest for each input clip are returned in a std::map
        // on a real host, these will be the regions of each input clip that the
        // effect needs to render a given frame (clipped to the RoD).
        //
        // In our example we are doing full frame fetches regardless.
        std::map<OFX::Host::ImageEffect::ClipInstance *, OfxRectD> rois;
        stat = instance->getRegionOfInterestAction(frame, renderScale,
                                                   regionOfInterest, rois);
        assert(stat == kOfxStatOK || stat == kOfxStatReplyDefault);

        // render a frame
        stat = instance->renderAction(t,kOfxImageFieldBoth,renderWindow, renderScale, /*sequential=*/true, /*interactive=*/false, /*draft=*/false);
        assert(stat == kOfxStatOK);

        // get the output image buffer
        MyHost::MyImage *outputImage = outputClip->getOutputImage();

        std::ostringstream ss;
        ss << "Output." << t << ".ppm";
        exportToPPM(ss.str(), outputImage);
      }

      instance->endRenderAction(0, numFramesToRender, 1.0, false, renderScale, /*sequential=*/true, /*interactive=*/false
                                );
    }
  }
  OFX::Host::PluginCache::clearPluginCache();
  return 0;
}