openfx-sys 0.1.0

/*
OFX Support Library, a library that skins the OFX plug-in API with C++ classes.
Copyright (C) 2004-2005 The Open Effects Association Ltd
Author Bruno Nicoletti bruno@thefoundry.co.uk

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.

The Open Effects Association Ltd
1 Wardour St
London W1D 6PA
England


*/

/** @file 

This file contains headers for classes that are used to validate property sets and make sure they have the right members and default values.

*/

#include "ofxsSupportPrivate.h"
#include <stdarg.h>
#ifdef OFX_SUPPORTS_OPENGLRENDER
#include "ofxOpenGLRender.h"
#endif

/** @brief Null pointer definition */
#define NULLPTR ((void *)(0))

// #define  kOfxsDisableValidation

// disable validation if not a debug build
#ifndef DEBUG
#define  kOfxsDisableValidation
#endif

//#define kOfxsDisableValidation
/** @brief OFX namespace
*/
namespace OFX {

  /** @brief The validation code has its own namespace */
  namespace Validation {

#ifndef kOfxsDisableValidation
    /** @brief Set the vector by getting dimension things specified by ilk from the argp list, used by PropertyDescription ctor */
    static void
      setVectorFromVarArgs(OFX::PropertyTypeEnum ilk,
      int dimension,
      va_list &argp,
      std::vector<ValueHolder> &vec)
    {
      char  *vS;
      int    vI;
      double vD;
      void  *vP;
      for(int i = 0; i < dimension; i++) {
        switch (ilk) 
        {
        case eString :
          vS = va_arg(argp, char *);
          vec.push_back(vS);
          break;

        case eInt :
          vI = va_arg(argp, int);
          vec.push_back(vI);
          break;

        case ePointer :
          vP = va_arg(argp, void *);
          vec.push_back(vP);
          break;

        case eDouble :
          vD = va_arg(argp, double);
          vec.push_back(vD);
          break;
        }
      }
    }


    /** @brief PropertyDescription var-args constructor */
    PropertyDescription::PropertyDescription(const char *name, OFX::PropertyTypeEnum ilk, int dimension, ...)
      : _name(name)
      , _exists(false) // only set when we have validated it
      , _dimension(dimension)
      , _ilk(ilk)
    {      
      // go through the var args to extract defaults to check against and values to set to
      va_list argp;
      va_start(argp, dimension);

      bool going = true;
      while(going) {
        // what is being set ?
        DescriptionTag tag = DescriptionTag(va_arg(argp, int));

        switch (tag) 
        {
        case eDescDefault : // we are setting default values to check against
          setVectorFromVarArgs(ilk, dimension, argp, _defaultValue);
          break;

        case eDescFinished : // we are finished
        default :
          going = false;
          break;
        }
      }

      va_end(argp);
    }


    /** @brief See if the property exists in the containing property set and has the correct dimension */
    void 
      PropertyDescription::validate(bool checkDefaults,
      PropertySet &propSet)
    {
      // see if it exists by fetching the dimension, 

      try {
        int hostDimension = propSet.propGetDimension(_name.c_str());
        _exists = true;  

        if(_dimension != -1) // -1 implies variable dimension
          OFX::Log::error(hostDimension != _dimension, "Host reports property '%s' has dimension %d, it should be %d;", _name.c_str(), hostDimension, _dimension); 
        // check type by getting the first element, the property getting will print any failure messages to the log
        if(hostDimension > 0) {
          switch(_ilk) 
          {
          case OFX::ePointer : { void *vP = propSet.propGetPointer(_name.c_str()); (void)vP; }break;
          case OFX::eInt :     { int vI = propSet.propGetInt(_name.c_str()); (void)vI; } break;
          case OFX::eString  : { std::string vS = propSet.propGetString(_name.c_str()); (void)vS; } break;
          case OFX::eDouble  : { double vD = propSet.propGetDouble(_name.c_str()); (void)vD; } break;
          }
        }

        // check the defaults are OK, if there are any
        int nDefs = (int)_defaultValue.size();
        if(checkDefaults && nDefs > 0) {
          OFX::Log::error(hostDimension != nDefs, "Host reports default dimension of '%s' as %d, which is different to the default dimension size of %d;", 
            _name.c_str(), hostDimension, nDefs);

          int N = hostDimension < nDefs ? hostDimension : nDefs;

          for(int i = 0; i < N; i++) {
            switch(_ilk) 
            {
            case OFX::ePointer : {
              void *vP = propSet.propGetPointer(_name.c_str(), i);
              OFX::Log::error(vP != (void *) _defaultValue[i], "Default value of %s[%d] = %p, it should be %p;",
                _name.c_str(), i, vP, (void *) _defaultValue[i]);
                                 }
                                 break;
            case OFX::eInt : {
              int vI = propSet.propGetInt(_name.c_str(), i);
              OFX::Log::error(vI != (int) _defaultValue[i], "Default value of %s[%d] = %d, it should be %d;",
                _name.c_str(), i, vI, (int) _defaultValue[i]);
                             }
                             break;
            case OFX::eString  : {
              std::string vS = propSet.propGetString(_name.c_str(), i);
              OFX::Log::error(vS != _defaultValue[i].vString, "Default value of %s[%d] = '%s', it should be '%s';",
                _name.c_str(), i, vS.c_str(), _defaultValue[i].vString.c_str());
                                 }
                                 break;
            case OFX::eDouble  : {
              double vD = propSet.propGetDouble(_name.c_str(), i);
              OFX::Log::error(vD != (double) _defaultValue[i], "Default value of %s[%d] = %g, it should be %g;",
                _name.c_str(), i, vD, (double) _defaultValue[i]);
                                 }
                                 break;
            }
          }
        }
      }
      catch (OFX::Exception::Suite &e)
      {
        // just catch it, the error will be reported
        _exists = false;
      }
      catch (OFX::Exception::PropertyUnknownToHost &e)
      {
        // just catch it, the error will be reported
        _exists = false;
      }
      catch (OFX::Exception::PropertyValueIllegalToHost &e)
      {
        // just catch it, the error will be reported
        _exists = false;
      }
    }


    /** @brief This macro is used to short hand passing the var args to @ref OFX::Validation::PropertySetDescription::PropertySetDescription */    
#define mPropDescriptionArg(descs) descs, sizeof(descs)/sizeof(PropertyDescription)

    /** @brief A set of property descriptions, constructor 

    Passed in as a zero terminated pairs of (PropertyDescription *descArray, int nDescriptions)

    */
    PropertySetDescription::PropertySetDescription(const char *setName, ...) // PropertyDescription *v, int nV)
      : _setName(setName)
    {

      // go through the var args to extract defaults to check against and values to set to
      va_list argp;
      va_start(argp, setName);

      while(1) {
        // get a pointer 
        PropertyDescription *descs = (PropertyDescription *) va_arg(argp, PropertyDescription *);

        // have we finished
        if(!descs) break;

        // get the count
        int nDescs = (int) va_arg(argp, int);

        // and set it up
        for(int i = 0; i < nDescs; i++) {
          _descriptions.push_back(descs + i);
        }

      }

      va_end(argp);
    }

    /** @brief destructor */
    PropertySetDescription::~PropertySetDescription()
    {
      int nToDelete  = (int)_deleteThese.size();
      for(int i = 0; i < nToDelete; i++) {
        delete _deleteThese[i];
      }
    }

    /** @brief Add more properties into the property vector */
    void
      PropertySetDescription::addProperty(PropertyDescription *desc,
      bool deleteOnDestruction)
    {
      _descriptions.push_back(desc);
      if(deleteOnDestruction)
        _deleteThese.push_back(desc);
    }

    /** @brief Validate all the properties in the set */
    void
      PropertySetDescription::validate(PropertySet &propSet, 
      bool checkDefaults,
      bool logOrdinaryMessages)
    {
      OFX::Log::print("START validating properties of %s.", _setName.c_str());
      OFX::Log::indent();

      // don't print ordinary messages whilst we are checking them
      if(!logOrdinaryMessages) PropertySet::propDisableLogging();

      // check each property in the description
      int n = (int)_descriptions.size();
      for(int i = 0; i < n; i++) 
        _descriptions[i]->validate(checkDefaults, propSet);

      if(!logOrdinaryMessages) PropertySet::propEnableLogging();

      OFX::Log::outdent();
      OFX::Log::print("STOP property validation of %s.", _setName.c_str());
    }


    /** @brief A list of properties that all hosts must have, and will be validated against. None of these has a default, but they must exist. */
    static PropertyDescription gHostProps[ ] =
    {
      // single dimensional string properties
      PropertyDescription(kOfxPropType,  OFX::eString, 1, eDescFinished),
      PropertyDescription(kOfxPropName,  OFX::eString, 1, eDescFinished),
      PropertyDescription(kOfxPropLabel, OFX::eString, 1, eDescFinished),

      // single dimensional int properties
      PropertyDescription(kOfxImageEffectHostPropIsBackground,           OFX::eInt, 1, eDescFinished),
      PropertyDescription(kOfxImageEffectPropSupportsOverlays,           OFX::eInt, 1, eDescFinished),
      PropertyDescription(kOfxImageEffectPropSupportsMultiResolution,    OFX::eInt, 1, eDescFinished),
      PropertyDescription(kOfxImageEffectPropSupportsTiles,              OFX::eInt, 1, eDescFinished),
      PropertyDescription(kOfxImageEffectPropTemporalClipAccess,         OFX::eInt, 1, eDescFinished),
      PropertyDescription(kOfxImageEffectPropSupportsMultipleClipDepths, OFX::eInt, 1, eDescFinished),
      PropertyDescription(kOfxImageEffectPropSupportsMultipleClipPARs,   OFX::eInt, 1, eDescFinished),
      PropertyDescription(kOfxImageEffectPropSetableFrameRate,           OFX::eInt, 1, eDescFinished),
      PropertyDescription(kOfxImageEffectPropSetableFielding,            OFX::eInt, 1, eDescFinished),
      PropertyDescription(kOfxParamHostPropSupportsStringAnimation,      OFX::eInt, 1, eDescFinished),
      PropertyDescription(kOfxParamHostPropSupportsCustomInteract,       OFX::eInt, 1, eDescFinished),
      PropertyDescription(kOfxParamHostPropSupportsChoiceAnimation,      OFX::eInt, 1, eDescFinished),
      PropertyDescription(kOfxParamHostPropSupportsBooleanAnimation,     OFX::eInt, 1, eDescFinished),
      PropertyDescription(kOfxParamHostPropSupportsCustomAnimation,      OFX::eInt, 1, eDescFinished),
      PropertyDescription(kOfxParamHostPropMaxParameters,                OFX::eInt, 1, eDescFinished),
      PropertyDescription(kOfxParamHostPropMaxPages,                     OFX::eInt, 1, eDescFinished),

      // variable multi dimensional string properties
      PropertyDescription(kOfxImageEffectPropSupportedComponents,        OFX::eString, -1, eDescFinished),
      PropertyDescription(kOfxImageEffectPropSupportedContexts,          OFX::eString, -1, eDescFinished),

      // multi dimensional int properities
      PropertyDescription(kOfxParamHostPropPageRowColumnCount,           OFX::eInt, 2, eDescFinished),
    };

    /** @brief the property set for the global host pointer */
    static PropertySetDescription gHostPropSet("Host Property", 
      gHostProps, sizeof(gHostProps)/sizeof(PropertyDescription),
      NULLPTR);


    /** @brief A list of properties to validate the effect descriptor against */
    static PropertyDescription gPluginDescriptorProps[ ] =
    {
      // string props that have no defaults that can be checked against
      PropertyDescription(kOfxPropLabel,                      OFX::eString, 1, eDescFinished),
      PropertyDescription(kOfxPropShortLabel,                 OFX::eString, 1, eDescFinished),
      PropertyDescription(kOfxPropLongLabel,                  OFX::eString, 1, eDescFinished),
      PropertyDescription(kOfxImageEffectPluginPropGrouping,  OFX::eString, 1, eDescFinished),
      PropertyDescription(kOfxPluginPropFilePath,             OFX::eString, 1, eDescFinished),

      // string props with defaults that can be checked against
      PropertyDescription(kOfxPropType,                             OFX::eString, 1, eDescDefault, kOfxTypeImageEffect, eDescFinished),
      PropertyDescription(kOfxImageEffectPluginRenderThreadSafety,  OFX::eString, 1, eDescDefault, kOfxImageEffectRenderFullySafe, eDescFinished),

      // int props with defaults that can be checked against
      PropertyDescription(kOfxImageEffectPluginPropSingleInstance,         OFX::eInt, 1, eDescDefault, 0, eDescFinished),
      PropertyDescription(kOfxImageEffectPluginPropHostFrameThreading,     OFX::eInt, 1, eDescDefault, 0, eDescFinished),
      PropertyDescription(kOfxImageEffectPropSupportsMultiResolution,      OFX::eInt, 1, eDescDefault, 1, eDescFinished),
      PropertyDescription(kOfxImageEffectPropSupportsTiles,                OFX::eInt, 1, eDescDefault, 1, eDescFinished),
      PropertyDescription(kOfxImageEffectPropTemporalClipAccess,           OFX::eInt, 1, eDescDefault, 0, eDescFinished),
      PropertyDescription(kOfxImageEffectPluginPropFieldRenderTwiceAlways, OFX::eInt, 1, eDescDefault, 1, eDescFinished),
      PropertyDescription(kOfxImageEffectPropSupportsMultipleClipDepths,   OFX::eInt, 1, eDescDefault, 0, eDescFinished),
      PropertyDescription(kOfxImageEffectPropSupportsMultipleClipPARs,     OFX::eInt, 1, eDescDefault, 0, eDescFinished),

      // Pointer props with defaults that can be checked against
      PropertyDescription(kOfxImageEffectPluginPropOverlayInteractV1,      OFX::ePointer, 1, eDescDefault, (void *)(0), eDescFinished),

      // string props that have variable dimension, and can't be checked against for defaults
      PropertyDescription(kOfxImageEffectPropSupportedContexts,  OFX::eString, -1, eDescFinished),
      PropertyDescription(kOfxImageEffectPropSupportedPixelDepths,  OFX::eString, -1, eDescFinished),
      PropertyDescription(kOfxImageEffectPropClipPreferencesSlaveParam,  OFX::eString, -1, eDescFinished),
    };

    /** @brief the property set for the global plugin descriptor */
    static PropertySetDescription gPluginDescriptorPropSet("Plugin Descriptor", 
      gPluginDescriptorProps, sizeof(gPluginDescriptorProps)/sizeof(PropertyDescription),
      NULLPTR);

    /** @brief A list of properties to validate the plugin instance */
    static PropertyDescription gPluginInstanceProps[ ] =
    {
      // string props with defaults that can be checked against
      PropertyDescription(kOfxPropType,                                OFX::eString,  1, eDescDefault, kOfxTypeImageEffectInstance, eDescFinished),

      // int props with defaults that can be checked against
      PropertyDescription(kOfxImageEffectInstancePropSequentialRender, OFX::eInt,     1, eDescDefault, 0, eDescFinished),

      // Pointer props with defaults that can be checked against
      PropertyDescription(kOfxPropInstanceData,                        OFX::ePointer, 1, eDescDefault, (void *)(0), eDescFinished),
      PropertyDescription(kOfxImageEffectPropPluginHandle,             OFX::ePointer, 1, eDescFinished),

      // string props that have no defaults that can be checked against
      PropertyDescription(kOfxImageEffectPropContext,                  OFX::eString,  1, eDescFinished),

      // int props with not defaults that can be checked against
      PropertyDescription(kOfxPropIsInteractive,                       OFX::eInt,     1, eDescFinished),

      // double props that can't be checked against for defaults
      PropertyDescription(kOfxImageEffectPropProjectSize,              OFX::eDouble,  2, eDescFinished),
      PropertyDescription(kOfxImageEffectPropProjectExtent,            OFX::eDouble,  2, eDescFinished),
      PropertyDescription(kOfxImageEffectPropProjectOffset,            OFX::eDouble,  2, eDescFinished),
      PropertyDescription(kOfxImageEffectPropProjectPixelAspectRatio,  OFX::eDouble,  1, eDescFinished),
      PropertyDescription(kOfxImageEffectInstancePropEffectDuration,   OFX::eDouble,  1, eDescFinished),
      PropertyDescription(kOfxImageEffectPropFrameRate,                OFX::eDouble,  1, eDescFinished),
    };

    /** @brief the property set for a plugin instance */
    static PropertySetDescription gPluginInstancePropSet("Plugin Instance", 
      gPluginInstanceProps, sizeof(gPluginInstanceProps)/sizeof(PropertyDescription),
      NULLPTR);

    /** @brief A list of properties to validate a clip descriptor */
    static PropertyDescription gClipDescriptorProps[ ] =
    {
      // string props with checkable defaults
      PropertyDescription(kOfxPropType,                           OFX::eString, 1, eDescDefault, kOfxTypeClip, eDescFinished),
      PropertyDescription(kOfxImageClipPropFieldExtraction,       OFX::eString, 1, eDescDefault, kOfxImageFieldDoubled, eDescFinished),

      // string props with no checkable defaults
      PropertyDescription(kOfxImageEffectPropSupportedComponents, OFX::eString,-1, eDescFinished),
      PropertyDescription(kOfxPropName,                           OFX::eString, 1, eDescFinished),
      PropertyDescription(kOfxPropLabel,                          OFX::eString, 1,  eDescFinished),
      PropertyDescription(kOfxPropShortLabel,                     OFX::eString, 1,  eDescFinished),
      PropertyDescription(kOfxPropLongLabel,                      OFX::eString, 1, eDescFinished),

      // int props with checkable defaults
      PropertyDescription(kOfxImageEffectPropTemporalClipAccess,  OFX::eInt, 1, eDescDefault, 0, eDescFinished),
      PropertyDescription(kOfxImageClipPropOptional,              OFX::eInt, 1, eDescDefault, 0, eDescFinished),
      PropertyDescription(kOfxImageClipPropIsMask,                OFX::eInt, 1, eDescDefault, 0, eDescFinished),
      PropertyDescription(kOfxImageEffectPropSupportsTiles,       OFX::eInt, 1, eDescDefault, 1, eDescFinished),
    };

    /** @brief the property set for a clip descriptor */
    static PropertySetDescription gClipDescriptorPropSet("Clip Descriptor", 
      gClipDescriptorProps, sizeof(gClipDescriptorProps)/sizeof(PropertyDescription),
      NULLPTR);


    /** @brief A list of properties to validate a clip instance */
    static PropertyDescription gClipInstanceProps[ ] =
    {
      // we can only validate this one against a fixed default
      PropertyDescription(kOfxPropType,                           OFX::eString, 1, eDescDefault, kOfxTypeClip, eDescFinished),

      // the rest are set by the plugin during description or by the host
      PropertyDescription(kOfxPropName,                           OFX::eString, 1, eDescFinished),
      PropertyDescription(kOfxPropLabel,                          OFX::eString, 1, eDescFinished),
      PropertyDescription(kOfxPropShortLabel,                     OFX::eString, 1, eDescFinished),
      PropertyDescription(kOfxPropLongLabel,                      OFX::eString, 1, eDescFinished),
      PropertyDescription(kOfxImageEffectPropSupportedComponents, OFX::eString,-1, eDescFinished),
      PropertyDescription(kOfxImageClipPropFieldExtraction,       OFX::eString, 1, eDescFinished),
      PropertyDescription(kOfxImageEffectPropPixelDepth,          OFX::eString, 1, eDescFinished),
      PropertyDescription(kOfxImageEffectPropComponents,          OFX::eString, 1, eDescFinished),
      PropertyDescription(kOfxImageClipPropUnmappedPixelDepth,    OFX::eString, 1, eDescFinished),
      PropertyDescription(kOfxImageClipPropUnmappedComponents,    OFX::eString, 1, eDescFinished),
      PropertyDescription(kOfxImageEffectPropPreMultiplication,   OFX::eString, 1, eDescFinished),
      PropertyDescription(kOfxImageClipPropFieldOrder,            OFX::eString, 1, eDescFinished),

      // int props
      PropertyDescription(kOfxImageEffectPropTemporalClipAccess, OFX::eInt, 1, eDescFinished),
      PropertyDescription(kOfxImageClipPropOptional,             OFX::eInt, 1, eDescFinished),
      PropertyDescription(kOfxImageClipPropIsMask,               OFX::eInt, 1, eDescFinished),
      PropertyDescription(kOfxImageEffectPropSupportsTiles,      OFX::eInt, 1, eDescFinished),
      PropertyDescription(kOfxImageClipPropConnected,            OFX::eInt, 1, eDescFinished),
      PropertyDescription(kOfxImageClipPropContinuousSamples,    OFX::eInt, 1, eDescFinished),

      // double props
      PropertyDescription(kOfxImagePropPixelAspectRatio,         OFX::eDouble, 1, eDescFinished),
      PropertyDescription(kOfxImageEffectPropFrameRate,          OFX::eDouble, 1, eDescFinished),
      PropertyDescription(kOfxImageEffectPropFrameRange,         OFX::eDouble, 2, eDescFinished),
      PropertyDescription(kOfxImageEffectPropUnmappedFrameRate,  OFX::eDouble, 1, eDescFinished),
      PropertyDescription(kOfxImageEffectPropUnmappedFrameRange, OFX::eDouble, 2, eDescFinished),
    };

    /** @brief the property set for a clip instance */
    static PropertySetDescription gClipInstancePropSet("Clip Instance", gClipInstanceProps, sizeof(gClipInstanceProps)/sizeof(PropertyDescription),
      NULLPTR);

    /** @brief List of properties to validate an image or texture instance */
    static PropertyDescription gImageBaseInstanceProps[ ] =
    {
      // this is the only property with a checkable default
      PropertyDescription(kOfxPropType,                         OFX::eString, 1, eDescDefault, kOfxTypeImage, eDescFinished),

      // all other properties are set by the host
      PropertyDescription(kOfxImageEffectPropPixelDepth,        OFX::eString, 1, eDescFinished),
      PropertyDescription(kOfxImageEffectPropComponents,        OFX::eString, 1, eDescFinished),
      PropertyDescription(kOfxImageEffectPropPreMultiplication, OFX::eString, 1, eDescFinished),
      PropertyDescription(kOfxImagePropField,                   OFX::eString, 1, eDescFinished),
      PropertyDescription(kOfxImagePropUniqueIdentifier,        OFX::eString, 1, eDescFinished),

      // double props
      PropertyDescription(kOfxImageEffectPropRenderScale,       OFX::eDouble, 2, eDescFinished),
      PropertyDescription(kOfxImagePropPixelAspectRatio,        OFX::eDouble, 1, eDescFinished),

      // pointer props
      PropertyDescription(kOfxImagePropData,                    OFX::ePointer, 1, eDescFinished),

      // int props
      PropertyDescription(kOfxImagePropBounds,                  OFX::eInt, 4, eDescFinished),
      PropertyDescription(kOfxImagePropRegionOfDefinition,      OFX::eInt, 4, eDescFinished),
      PropertyDescription(kOfxImagePropRowBytes,                OFX::eInt, 1, eDescFinished),
    };

    /** @brief the property set for an image instance */
    static PropertySetDescription gImageBaseInstancePropSet("Image or Texture Instance",
      gImageBaseInstanceProps, sizeof(gImageBaseInstanceProps)/sizeof(PropertyDescription),
      NULLPTR);

    /** @brief List of properties to validate an image or texture instance */
    static PropertyDescription gImageInstanceProps[ ] =
    {
      // pointer props
      PropertyDescription(kOfxImagePropData,                    OFX::ePointer, 1, eDescFinished),
    };

    /** @brief the property set for an image instance */
    static PropertySetDescription gImageInstancePropSet("Image Instance",
      gImageInstanceProps, sizeof(gImageInstanceProps)/sizeof(PropertyDescription),
      NULLPTR);

#ifdef OFX_SUPPORTS_OPENGLRENDER
    /** @brief List of properties to validate an image or texture instance */
    static PropertyDescription gTextureInstanceProps[ ] =
    {
      // pointer props
      PropertyDescription(kOfxImageEffectPropOpenGLTextureIndex, OFX::eInt, 1, eDescFinished),
      PropertyDescription(kOfxImageEffectPropOpenGLTextureTarget, OFX::eInt, 1, eDescFinished),
    };

    /** @brief the property set for an image instance */
    static PropertySetDescription gTextureInstancePropSet("Texture Instance",
      gTextureInstanceProps, sizeof(gTextureInstanceProps)/sizeof(PropertyDescription),
      NULLPTR);
#endif

    ////////////////////////////////////////////////////////////////////////////////
    // Action in/out args properties 
    ////////////////////////////////////////////////////////////////////////////////

    /** @brief kOfxImageEffectActionDescribeInContext actions's inargs properties */
    static PropertyDescription gDescribeInContextActionInArgProps[ ] =
    {
      PropertyDescription(kOfxImageEffectPropContext,   OFX::eString, 1, eDescFinished),
    };

    /** @brief the property set for describe in context action  */
    static PropertySetDescription gDescribeInContextActionInArgPropSet(kOfxImageEffectActionDescribeInContext " in argument", 
      gDescribeInContextActionInArgProps, sizeof(gDescribeInContextActionInArgProps)/sizeof(PropertyDescription),
      NULLPTR);

    /** @brief kOfxImageEffectActionRender action's inargs properties */
    static PropertyDescription gRenderActionInArgProps[ ] =
    {
      PropertyDescription(kOfxPropTime,                     OFX::eDouble, 1, eDescFinished),
      PropertyDescription(kOfxImageEffectPropRenderScale,   OFX::eDouble, 2, eDescFinished),
      PropertyDescription(kOfxImageEffectPropRenderWindow,  OFX::eInt,    4, eDescFinished),
      PropertyDescription(kOfxImageEffectPropFieldToRender, OFX::eString, 1, eDescFinished),
      // The following appeared in OFX 1.2, and are thus not mandatory
      //PropertyDescription(kOfxImageEffectPropSequentialRenderStatus,  OFX::eInt,    1, eDescFinished),
      //PropertyDescription(kOfxImageEffectPropInteractiveRenderStatus, OFX::eInt,    1, eDescFinished),
      // The following appeared in OFX 1.4,  and is thus not mandatory
      //PropertyDescription(kOfxImageEffectPropRenderQualityDraft, OFX::eInt,    1, eDescFinished),
    };

    /** @brief kOfxImageEffectActionRender property set */
    static PropertySetDescription gRenderActionInArgPropSet(kOfxImageEffectActionRender " in argument", 
      gRenderActionInArgProps, sizeof(gRenderActionInArgProps)/sizeof(PropertyDescription),
      NULLPTR);

    /** @brief kOfxImageEffectActionBeginSequenceRender action's inargs properties */
    static PropertyDescription gBeginSequenceRenderActionInArgProps[ ] =
    {
      PropertyDescription(kOfxImageEffectPropFrameRange,  OFX::eDouble, 2, eDescFinished),
      PropertyDescription(kOfxImageEffectPropFrameStep,   OFX::eDouble, 1, eDescFinished),
      PropertyDescription(kOfxImageEffectPropRenderScale, OFX::eDouble, 2, eDescFinished),
      PropertyDescription(kOfxPropIsInteractive,          OFX::eInt, 1, eDescFinished),
      // The following appeared in OFX 1.2, and are thus not mandatory
      //PropertyDescription(kOfxImageEffectPropSequentialRenderStatus,  OFX::eInt,    1, eDescFinished),
      //PropertyDescription(kOfxImageEffectPropInteractiveRenderStatus, OFX::eInt,    1, eDescFinished),
    };

    /** @brief kOfxImageEffectActionBeginSequenceRender property set */
    static PropertySetDescription gBeginSequenceRenderActionInArgPropSet(kOfxImageEffectActionBeginSequenceRender " in argument", 
      gBeginSequenceRenderActionInArgProps, sizeof(gBeginSequenceRenderActionInArgProps)/sizeof(PropertyDescription),
      NULLPTR);

    /** @brief kOfxImageEffectActionEndSequenceRender action's inargs properties */
    static PropertyDescription gEndSequenceRenderActionInArgProps[ ] =
    {
      PropertyDescription(kOfxImageEffectPropFrameRange,  OFX::eDouble, 2, eDescFinished),
      PropertyDescription(kOfxImageEffectPropFrameStep,   OFX::eDouble, 1, eDescFinished),
      PropertyDescription(kOfxImageEffectPropRenderScale, OFX::eDouble, 2, eDescFinished),
      PropertyDescription(kOfxPropIsInteractive,          OFX::eInt, 1, eDescFinished),
      // The following appeared in OFX 1.2, and are thus not mandatory
      //PropertyDescription(kOfxImageEffectPropSequentialRenderStatus,  OFX::eInt,    1, eDescFinished),
      //PropertyDescription(kOfxImageEffectPropInteractiveRenderStatus, OFX::eInt,    1, eDescFinished),
    };

    /** @brief kOfxImageEffectActionEndSequenceRender property set */
    static PropertySetDescription gEndSequenceRenderActionInArgPropSet(kOfxImageEffectActionEndSequenceRender " in argument", 
      gEndSequenceRenderActionInArgProps, sizeof(gEndSequenceRenderActionInArgProps)/sizeof(PropertyDescription),
      NULLPTR);

    /** @brief kOfxImageEffectActionIsIdentity action's inargs properties */
    static PropertyDescription gIsIdentityActionInArgProps[ ] =
    {
      PropertyDescription(kOfxPropTime,                     OFX::eDouble, 1, eDescFinished),
      PropertyDescription(kOfxImageEffectPropRenderScale,   OFX::eDouble, 2, eDescFinished),
      PropertyDescription(kOfxImageEffectPropRenderWindow,  OFX::eInt,    4, eDescFinished),
      PropertyDescription(kOfxImageEffectPropFieldToRender, OFX::eString, 1, eDescFinished),
    };

    /** @brief kOfxImageEffectActionIsIdentity property set */
    static PropertySetDescription gIsIdentityActionInArgPropSet(kOfxImageEffectActionIsIdentity " in argument", 
      gIsIdentityActionInArgProps, sizeof(gIsIdentityActionInArgProps)/sizeof(PropertyDescription),
      NULLPTR);

    /** @brief kOfxImageEffectActionIsIdentity action's outargs properties */
    static PropertyDescription gIsIdentityActionOutArgProps[ ] =
    {
      PropertyDescription(kOfxPropTime, OFX::eDouble, 1, eDescFinished),
      PropertyDescription(kOfxPropName, OFX::eString, 1, eDescFinished),
    };

    /** @brief kOfxImageEffectActionIsIdentity property set */
    static PropertySetDescription gIsIdentityActionOutArgPropSet(kOfxImageEffectActionIsIdentity " out argument", 
      gIsIdentityActionOutArgProps, sizeof(gIsIdentityActionOutArgProps)/sizeof(PropertyDescription),
      NULLPTR);

    /** @brief kOfxImageEffectActionGetRegionOfDefinition action's inargs properties */
    static PropertyDescription gGetRegionOfDefinitionInArgProps[ ] =
    {
      PropertyDescription(kOfxPropTime,                     OFX::eDouble, 1, eDescFinished),
      PropertyDescription(kOfxImageEffectPropRenderScale,   OFX::eDouble, 2, eDescFinished),
    };

    /** @brief kOfxImageEffectActionGetRegionOfDefinition property set */
    static PropertySetDescription gGetRegionOfDefinitionInArgPropSet(kOfxImageEffectActionGetRegionOfDefinition " in argument", 
      gGetRegionOfDefinitionInArgProps, sizeof(gGetRegionOfDefinitionInArgProps)/sizeof(PropertyDescription),
      NULLPTR);

    /** @brief kOfxImageEffectActionGetRegionOfDefinition action's outargs properties */
    static PropertyDescription gGetRegionOfDefinitionOutArgProps[ ] =
    {
      PropertyDescription(kOfxImageEffectPropRegionOfDefinition,   OFX::eDouble, 4, eDescFinished),
    };

    /** @brief kOfxImageEffectActionGetRegionOfDefinition  property set */
    static PropertySetDescription gGetRegionOfDefinitionOutArgPropSet(kOfxImageEffectActionGetRegionOfDefinition " out argument",
      gGetRegionOfDefinitionOutArgProps, sizeof(gGetRegionOfDefinitionOutArgProps)/sizeof(PropertyDescription),
      NULLPTR);

    /** @brief kOfxImageEffectActionGetRegionsOfInterest action's inargs properties */
    static PropertyDescription gGetRegionOfInterestInArgProps[ ] =
    {
      PropertyDescription(kOfxPropTime,                          OFX::eDouble, 1, eDescFinished),
      PropertyDescription(kOfxImageEffectPropRenderScale,        OFX::eDouble, 2, eDescFinished),
      PropertyDescription(kOfxImageEffectPropRegionOfInterest,   OFX::eDouble, 4, eDescFinished),
    };

    /** @brief kOfxImageEffectActionGetRegionsOfInterest property set */
    static PropertySetDescription gGetRegionOfInterestInArgPropSet(kOfxImageEffectActionGetRegionsOfInterest "in argument",
      gGetRegionOfInterestInArgProps, sizeof(gGetRegionOfInterestInArgProps)/sizeof(PropertyDescription),
      NULLPTR);

    /** @brief kOfxImageEffectActionGetTimeDomain action's outargs properties */
    static PropertyDescription gGetTimeDomainOutArgProps[ ] =
    {
      PropertyDescription(kOfxImageEffectPropFrameRange,   OFX::eDouble, 2, eDescFinished),
    };

    /** @brief kOfxImageEffectActionGetTimeDomain property set */
    static PropertySetDescription gGetTimeDomainOutArgPropSet(kOfxImageEffectActionGetTimeDomain " out argument", 
      gGetTimeDomainOutArgProps, sizeof(gGetTimeDomainOutArgProps)/sizeof(PropertyDescription),
      NULLPTR);

    /** @brief kOfxImageEffectActionGetFramesNeeded action's inargs properties */
    static PropertyDescription gGetFramesNeededInArgProps[ ] =
    {
      PropertyDescription(kOfxPropTime,                     OFX::eDouble, 1, eDescFinished),
    };

    /** @brief kOfxImageEffectActionGetFramesNeeded  property set */
    static PropertySetDescription gGetFramesNeededInArgPropSet(kOfxImageEffectActionGetFramesNeeded " in argument", 
      gGetFramesNeededInArgProps, sizeof(gGetFramesNeededInArgProps)/sizeof(PropertyDescription),
      NULLPTR);

    /** @brief kOfxImageEffectActionGetClipPreferences action's outargs properties */
    static PropertyDescription gGetClipPreferencesOutArgProps[ ] =
    {
      PropertyDescription(kOfxImageEffectPropFrameRate,         OFX::eDouble, 1, eDescFinished),
      PropertyDescription(kOfxImageClipPropFieldOrder,          OFX::eString, 1, eDescFinished),
      PropertyDescription(kOfxImageClipPropContinuousSamples,   OFX::eInt, 1, eDescDefault, 0, eDescFinished),
      PropertyDescription(kOfxImageEffectFrameVarying,          OFX::eInt, 1, eDescDefault, 0, eDescFinished),
      PropertyDescription(kOfxImageEffectPropPreMultiplication, OFX::eString, 1, eDescFinished),
    };

    /** @brief kOfxImageEffectActionGetClipPreferences property set */
    static PropertySetDescription gGetClipPreferencesOutArgPropSet(kOfxImageEffectActionGetClipPreferences " out argument", 
      gGetClipPreferencesOutArgProps, sizeof(gGetClipPreferencesOutArgProps)/sizeof(PropertyDescription),
      NULLPTR);

    /** @brief kOfxActionInstanceChanged action's inargs properties */
    static PropertyDescription gInstanceChangedInArgProps[ ] =
    {
      PropertyDescription(kOfxPropType,                   OFX::eString, 1, eDescFinished),
      PropertyDescription(kOfxPropName,                   OFX::eString, 1, eDescFinished),
      PropertyDescription(kOfxPropChangeReason,           OFX::eString, 1, eDescFinished),
      PropertyDescription(kOfxPropTime,                   OFX::eDouble, 1, eDescFinished),
      PropertyDescription(kOfxImageEffectPropRenderScale, OFX::eDouble, 2, eDescFinished),
    };

    /** @brief kOfxActionInstanceChanged property set */
    static PropertySetDescription gInstanceChangedInArgPropSet(kOfxActionInstanceChanged " in argument",
      gInstanceChangedInArgProps, sizeof(gInstanceChangedInArgProps)/sizeof(PropertyDescription),
      NULLPTR);

    /** @brief kOfxActionBeginInstanceChanged and kOfxActionEndInstanceChanged actions' inargs properties */
    static PropertyDescription gBeginEndInstanceChangedInArgProps[ ] =
    {
      PropertyDescription(kOfxPropChangeReason,           OFX::eString, 1, eDescFinished),
    };

    /** @brief kOfxActionBeginInstanceChanged property set */
    static PropertySetDescription gBeginInstanceChangedInArgPropSet(kOfxActionBeginInstanceChanged " in argument",
      gBeginEndInstanceChangedInArgProps, sizeof(gBeginEndInstanceChangedInArgProps)/sizeof(PropertyDescription),
      NULLPTR);
    /** @brief kOfxActionEndInstanceChanged property set */
    static PropertySetDescription gEndInstanceChangedInArgPropSet(kOfxActionEndInstanceChanged " in argument",
      gBeginEndInstanceChangedInArgProps, sizeof(gBeginEndInstanceChangedInArgProps)/sizeof(PropertyDescription),
      NULLPTR);


    ////////////////////////////////////////////////////////////////////////////////
    // parameter properties 
    ////////////////////////////////////////////////////////////////////////////////

    /** @brief Basic parameter descriptor properties */
    static PropertyDescription gBasicParamProps[ ] =
    {
      PropertyDescription(kOfxPropType,                   OFX::eString, 1, eDescDefault, kOfxTypeParameter, eDescFinished),
      PropertyDescription(kOfxPropName,                   OFX::eString, 1, eDescFinished),
      PropertyDescription(kOfxPropLabel,                  OFX::eString, 1, eDescFinished),
      PropertyDescription(kOfxPropShortLabel,             OFX::eString, 1, eDescFinished),
      PropertyDescription(kOfxPropLongLabel,              OFX::eString, 1, eDescFinished),
      PropertyDescription(kOfxParamPropType,              OFX::eString, 1, eDescFinished),
      PropertyDescription(kOfxParamPropSecret,            OFX::eInt,    1, eDescDefault, 0, eDescFinished),
      PropertyDescription(kOfxParamPropHint,              OFX::eString, 1, eDescFinished),
      PropertyDescription(kOfxParamPropScriptName,        OFX::eString, 1, eDescFinished),
      PropertyDescription(kOfxParamPropParent,            OFX::eString, 1, eDescFinished),
      PropertyDescription(kOfxParamPropEnabled,           OFX::eInt,    1, eDescDefault, 1, eDescFinished),
      PropertyDescription(kOfxParamPropDataPtr,           OFX::ePointer,1, eDescDefault, (void *)(0), eDescFinished),
    };


    /** @brief Props for params that can have an interact override their UI */
    static PropertyDescription gInteractOverideParamProps[ ] =
    {
      PropertyDescription(kOfxParamPropInteractV1,           OFX::ePointer,1, eDescDefault, (void *)(0), eDescFinished),
      PropertyDescription(kOfxParamPropInteractSize,         OFX::eDouble, 2, eDescFinished),
      PropertyDescription(kOfxParamPropInteractSizeAspect,   OFX::eDouble, 1, eDescDefault, 1.0, eDescFinished),
      PropertyDescription(kOfxParamPropInteractMinimumSize,  OFX::eDouble, 2, eDescDefault, 10, 10, eDescFinished),
      PropertyDescription(kOfxParamPropInteractPreferedSize, OFX::eInt,    2, eDescDefault, 10, 10, eDescFinished),
    };

    /** @brief Props for params that can hold values. */
    static PropertyDescription gValueHolderParamProps[ ] =
    {
      PropertyDescription(kOfxParamPropIsAnimating,               OFX::eInt,    1, eDescFinished),
      PropertyDescription(kOfxParamPropIsAutoKeying,              OFX::eInt,    1, eDescFinished),
      PropertyDescription(kOfxParamPropPersistant,                OFX::eInt,    1, eDescDefault, 1, eDescFinished),
      PropertyDescription(kOfxParamPropEvaluateOnChange,          OFX::eInt,    1, eDescDefault, 1, eDescFinished),
#    ifdef kOfxParamPropPluginMayWrite
      PropertyDescription(kOfxParamPropPluginMayWrite,            OFX::eInt,    1, eDescDefault, 0, eDescFinished), // removed in OFX 1.4
#    endif
      PropertyDescription(kOfxParamPropCacheInvalidation,         OFX::eString, 1, eDescDefault, kOfxParamInvalidateValueChange, eDescFinished),
      PropertyDescription(kOfxParamPropCanUndo,                   OFX::eInt,    1, eDescDefault, 1, eDescFinished),
    };

    /** @brief values for a string param */
    static PropertyDescription gStringParamProps[ ] =
    {
      PropertyDescription(kOfxParamPropDefault,              OFX::eString, 1, eDescFinished),
      PropertyDescription(kOfxParamPropAnimates,             OFX::eInt,    1, eDescDefault, 0, eDescFinished),
      PropertyDescription(kOfxParamPropStringMode,           OFX::eString, 1, eDescDefault, kOfxParamStringIsSingleLine, eDescFinished),
      PropertyDescription(kOfxParamPropStringFilePathExists, OFX::eInt,    1, eDescDefault, 1, eDescFinished),
    };

    /** @brief values for a string param */
    static PropertyDescription gCustomParamProps[ ] =
    {
      PropertyDescription(kOfxParamPropDefault,                OFX::eString,  1, eDescFinished),
      PropertyDescription(kOfxParamPropAnimates,               OFX::eInt,     1, eDescDefault, 0, eDescFinished),
      PropertyDescription(kOfxParamPropCustomInterpCallbackV1, OFX::ePointer, 1, eDescDefault, NULLPTR, eDescFinished),
    };

    /** @brief properties for an RGB colour param */
    static PropertyDescription gRGBColourParamProps[ ] =
    {
      PropertyDescription(kOfxParamPropDefault,              OFX::eDouble, 3, eDescFinished),
      PropertyDescription(kOfxParamPropAnimates,             OFX::eInt,    1, eDescDefault, 1, eDescFinished),
      PropertyDescription(kOfxParamPropMin,                  OFX::eDouble, 3, eDescDefault, 0., 0., 0., eDescFinished),
      PropertyDescription(kOfxParamPropMax,                  OFX::eDouble, 3, eDescDefault, 1., 1., 1., eDescFinished),
      PropertyDescription(kOfxParamPropDisplayMin,           OFX::eDouble, 3, eDescDefault, 0., 0., 0., eDescFinished),
      PropertyDescription(kOfxParamPropDisplayMax,           OFX::eDouble, 3, eDescDefault, 1., 1., 1., eDescFinished),
      PropertyDescription(kOfxParamPropDimensionLabel,       OFX::eString, 3, eDescDefault, "r", "g", "b", eDescFinished),
    };

    /** @brief properties for an RGBA colour param */
    static PropertyDescription gRGBAColourParamProps[ ] =
    {
      PropertyDescription(kOfxParamPropDefault,              OFX::eDouble, 4, eDescFinished),
      PropertyDescription(kOfxParamPropAnimates,             OFX::eInt,    1, eDescDefault, 1, eDescFinished),
      PropertyDescription(kOfxParamPropMin,                  OFX::eDouble, 4, eDescDefault, 0., 0., 0., 0., eDescFinished),
      PropertyDescription(kOfxParamPropMax,                  OFX::eDouble, 4, eDescDefault, 1., 1., 1., 1., eDescFinished),
      PropertyDescription(kOfxParamPropDisplayMin,           OFX::eDouble, 4, eDescDefault, 0., 0., 0., 0., eDescFinished),
      PropertyDescription(kOfxParamPropDisplayMax,           OFX::eDouble, 4, eDescDefault, 1., 1., 1., 1., eDescFinished),
      PropertyDescription(kOfxParamPropDimensionLabel,       OFX::eString, 4, eDescDefault, "r", "g", "b", "a", eDescFinished),
    };

    /** @brief properties for a boolean param */
    static PropertyDescription gBooleanParamProps[ ] =
    {
      PropertyDescription(kOfxParamPropDefault,              OFX::eInt, 1, eDescFinished),
      PropertyDescription(kOfxParamPropAnimates,             OFX::eInt, 1, eDescDefault, 0, eDescFinished),
    };


    /** @brief properties for a boolean param */
    static PropertyDescription gChoiceParamProps[ ] =
    {
      PropertyDescription(kOfxParamPropDefault,              OFX::eInt,     1, eDescFinished),
      PropertyDescription(kOfxParamPropAnimates,             OFX::eInt,     1, eDescDefault, 0, eDescFinished),
      PropertyDescription(kOfxParamPropChoiceOption,         OFX::eString, -1, eDescFinished),
    };

    /** @brief properties for a 1D integer param */
    static PropertyDescription gInt1DParamProps[ ] =
    {
      PropertyDescription(kOfxParamPropDefault,              OFX::eInt, 1, eDescFinished),
      PropertyDescription(kOfxParamPropMin,                  OFX::eInt, 1, eDescFinished),
      PropertyDescription(kOfxParamPropMax,                  OFX::eInt, 1, eDescFinished),
      PropertyDescription(kOfxParamPropDisplayMin,           OFX::eInt, 1, eDescFinished),
      PropertyDescription(kOfxParamPropDisplayMax,           OFX::eInt, 1, eDescFinished),
      PropertyDescription(kOfxParamPropAnimates,             OFX::eInt, 1, eDescDefault, 1, eDescFinished),
    };

    /** @brief properties for a 2D integer param */
    static PropertyDescription gInt2DParamProps[ ] =
    {
      PropertyDescription(kOfxParamPropDefault,              OFX::eInt, 2, eDescFinished),
      PropertyDescription(kOfxParamPropMin,                  OFX::eInt, 2, eDescFinished),
      PropertyDescription(kOfxParamPropMax,                  OFX::eInt, 2, eDescFinished),
      PropertyDescription(kOfxParamPropDisplayMin,           OFX::eInt, 2, eDescFinished),
      PropertyDescription(kOfxParamPropDisplayMax,           OFX::eInt, 2, eDescFinished),
      PropertyDescription(kOfxParamPropAnimates,             OFX::eInt, 1, eDescDefault, 1, eDescFinished),
      PropertyDescription(kOfxParamPropDimensionLabel,       OFX::eString, 2, eDescDefault, "x", "y", eDescFinished),
    };

    /** @brief properties for a 3D integer param */
    static PropertyDescription gInt3DParamProps[ ] =
    {
      PropertyDescription(kOfxParamPropDefault,              OFX::eInt, 3, eDescFinished),
      PropertyDescription(kOfxParamPropMin,                  OFX::eInt, 3, eDescFinished),
      PropertyDescription(kOfxParamPropMax,                  OFX::eInt, 3, eDescFinished),
      PropertyDescription(kOfxParamPropDisplayMin,           OFX::eInt, 3, eDescFinished),
      PropertyDescription(kOfxParamPropDisplayMax,           OFX::eInt, 3, eDescFinished),
      PropertyDescription(kOfxParamPropAnimates,             OFX::eInt, 1, eDescDefault, 1, eDescFinished),
      PropertyDescription(kOfxParamPropDimensionLabel,       OFX::eString, 3, eDescDefault, "x", "y", "z", eDescFinished),
    };

    /** @brief Properties common to all double params */
    static PropertyDescription gDoubleParamProps[ ] =
    {
      PropertyDescription(kOfxParamPropAnimates,             OFX::eInt,    1, eDescDefault, 1, eDescFinished),
      PropertyDescription(kOfxParamPropIncrement,            OFX::eDouble, 1, eDescFinished),
      PropertyDescription(kOfxParamPropDigits,               OFX::eInt,    1, eDescFinished),
      PropertyDescription(kOfxParamPropDoubleType,           OFX::eString, 1, eDescDefault, kOfxParamDoubleTypePlain, eDescFinished),
    };


    /** @brief properties for a 1D double param */
    static PropertyDescription gDouble1DParamProps[ ] =
    {
      PropertyDescription(kOfxParamPropDefault,              OFX::eDouble, 1, eDescFinished),
      PropertyDescription(kOfxParamPropMin,                  OFX::eDouble, 1, eDescFinished),
      PropertyDescription(kOfxParamPropMax,                  OFX::eDouble, 1, eDescFinished),
      PropertyDescription(kOfxParamPropDisplayMin,           OFX::eDouble, 1, eDescFinished),
      PropertyDescription(kOfxParamPropDisplayMax,           OFX::eDouble, 1, eDescFinished),
      PropertyDescription(kOfxParamPropShowTimeMarker,       OFX::eInt,    1, eDescDefault, 0, eDescFinished),
    };

    /** @brief properties for a 2D double  param */
    static PropertyDescription gDouble2DParamProps[ ] =
    {
      PropertyDescription(kOfxParamPropDefault,              OFX::eDouble, 2, eDescFinished),
      PropertyDescription(kOfxParamPropMin,                  OFX::eDouble, 2, eDescFinished),
      PropertyDescription(kOfxParamPropMax,                  OFX::eDouble, 2, eDescFinished),
      PropertyDescription(kOfxParamPropDisplayMin,           OFX::eDouble, 2, eDescFinished),
      PropertyDescription(kOfxParamPropDisplayMax,           OFX::eDouble, 2, eDescFinished),
      PropertyDescription(kOfxParamPropDimensionLabel,       OFX::eString, 2, eDescDefault, "x", "y", eDescFinished),
    };

    /** @brief properties for a 3D double param */
    static PropertyDescription gDouble3DParamProps[ ] =
    {
      PropertyDescription(kOfxParamPropDefault,              OFX::eDouble, 3, eDescFinished),
      PropertyDescription(kOfxParamPropMin,                  OFX::eDouble, 3, eDescFinished),
      PropertyDescription(kOfxParamPropMax,                  OFX::eDouble, 3, eDescFinished),
      PropertyDescription(kOfxParamPropDisplayMin,           OFX::eDouble, 3, eDescFinished),
      PropertyDescription(kOfxParamPropDisplayMax,           OFX::eDouble, 3, eDescFinished),
      PropertyDescription(kOfxParamPropDimensionLabel,       OFX::eString, 3, eDescDefault, "x", "y", "z", eDescFinished),
    };

    /** @brief properties for a group param */
    static PropertyDescription gGroupParamProps[ ] =
    {
      PropertyDescription(kOfxParamPropGroupOpen,           OFX::eInt, 1, eDescFinished),
    };

    /** @brief properties for a page param */
    static PropertyDescription gPageParamProps[ ] =
    {
      PropertyDescription(kOfxParamPropPageChild,            OFX::eString, -1, eDescFinished),
    };

    /** @brief properties for a parametric param */
    static PropertyDescription gParametricParamProps[ ] =
    {
      PropertyDescription(kOfxParamPropAnimates,                     OFX::eInt,     1, eDescDefault, 1, eDescFinished),
      PropertyDescription(kOfxParamPropCanUndo,                      OFX::eInt,     1, eDescDefault, 1, eDescFinished),
      PropertyDescription(kOfxParamPropParametricDimension,          OFX::eInt,     1, eDescDefault, 1, eDescFinished),
      PropertyDescription(kOfxParamPropParametricUIColour,           OFX::eDouble, -1, eDescFinished),
      PropertyDescription(kOfxParamPropParametricInteractBackground, OFX::ePointer, 1, eDescDefault, (void*)(0), eDescFinished),
      PropertyDescription(kOfxParamPropParametricRange,              OFX::eDouble,  2, eDescDefault, 0.0, 1.0, eDescFinished),
    };

    /** @brief Property set for 1D ints */
    static PropertySetDescription gInt1DParamPropSet("1D Integer parameter",
      mPropDescriptionArg(gBasicParamProps),
      mPropDescriptionArg(gInteractOverideParamProps),
      mPropDescriptionArg(gValueHolderParamProps),
      mPropDescriptionArg(gInt1DParamProps),
      NULLPTR);


    /** @brief Property set for 2D ints */
    static PropertySetDescription gInt2DParamPropSet("2D Integer parameter",
      mPropDescriptionArg(gBasicParamProps),
      mPropDescriptionArg(gInteractOverideParamProps),
      mPropDescriptionArg(gValueHolderParamProps),
      mPropDescriptionArg(gInt2DParamProps),
      NULLPTR);

    /** @brief Property set for 3D ints */
    static PropertySetDescription gInt3DParamPropSet("3D Integer parameter",
      mPropDescriptionArg(gBasicParamProps),
      mPropDescriptionArg(gInteractOverideParamProps),
      mPropDescriptionArg(gValueHolderParamProps),
      mPropDescriptionArg(gInt3DParamProps),
      NULLPTR);

    /** @brief Property set for 1D doubles */
    static PropertySetDescription gDouble1DParamPropSet("1D Double parameter",
      mPropDescriptionArg(gBasicParamProps),
      mPropDescriptionArg(gInteractOverideParamProps),
      mPropDescriptionArg(gValueHolderParamProps),
      mPropDescriptionArg(gDoubleParamProps),
      mPropDescriptionArg(gDouble1DParamProps),
      NULLPTR);


    /** @brief Property set for 2D doubles */
    static PropertySetDescription gDouble2DParamPropSet("2D Double parameter",
      mPropDescriptionArg(gBasicParamProps),
      mPropDescriptionArg(gInteractOverideParamProps),
      mPropDescriptionArg(gValueHolderParamProps),
      mPropDescriptionArg(gDoubleParamProps),
      mPropDescriptionArg(gDouble2DParamProps),
      NULLPTR);

    /** @brief Property set for 3D doubles */
    static PropertySetDescription gDouble3DParamPropSet("3D Double parameter",
      mPropDescriptionArg(gBasicParamProps),
      mPropDescriptionArg(gInteractOverideParamProps),
      mPropDescriptionArg(gValueHolderParamProps),
      mPropDescriptionArg(gDoubleParamProps),
      mPropDescriptionArg(gDouble3DParamProps),
      NULLPTR);

    /** @brief Property set for RGB colour params */
    static PropertySetDescription gRGBParamPropSet("RGB Colour parameter",
      mPropDescriptionArg(gBasicParamProps),
      mPropDescriptionArg(gInteractOverideParamProps),
      mPropDescriptionArg(gValueHolderParamProps),
      mPropDescriptionArg(gRGBColourParamProps),
      NULLPTR);

    /** @brief Property set for RGB colour params */
    static PropertySetDescription gRGBAParamPropSet("RGB Colour parameter",
      mPropDescriptionArg(gBasicParamProps),
      mPropDescriptionArg(gInteractOverideParamProps),
      mPropDescriptionArg(gValueHolderParamProps),
      mPropDescriptionArg(gRGBAColourParamProps),
      NULLPTR);

    /** @brief Property set for string params */
    static PropertySetDescription gStringParamPropSet("String parameter",
      mPropDescriptionArg(gBasicParamProps),
      mPropDescriptionArg(gInteractOverideParamProps),
      mPropDescriptionArg(gValueHolderParamProps),
      mPropDescriptionArg(gStringParamProps),
      NULLPTR);

    /** @brief Property set for string params */
    static PropertySetDescription gCustomParamPropSet("Custom parameter",
      mPropDescriptionArg(gBasicParamProps),
      mPropDescriptionArg(gInteractOverideParamProps),
      mPropDescriptionArg(gValueHolderParamProps),
      mPropDescriptionArg(gCustomParamProps),
      NULLPTR);

    /** @brief Property set for boolean params */
    static PropertySetDescription gBooleanParamPropSet("Boolean parameter",
      mPropDescriptionArg(gBasicParamProps),
      mPropDescriptionArg(gInteractOverideParamProps),
      mPropDescriptionArg(gValueHolderParamProps),
      mPropDescriptionArg(gBooleanParamProps),
      NULLPTR);

    /** @brief Property set for choice params */
    static PropertySetDescription gChoiceParamPropSet("Choice parameter",
      mPropDescriptionArg(gBasicParamProps),
      mPropDescriptionArg(gInteractOverideParamProps),
      mPropDescriptionArg(gValueHolderParamProps),
      mPropDescriptionArg(gChoiceParamProps),
      NULLPTR);

    /** @brief Property set for push button params */
    static PropertySetDescription gPushButtonParamPropSet("PushButton parameter",
      mPropDescriptionArg(gBasicParamProps),
      mPropDescriptionArg(gInteractOverideParamProps),
      NULLPTR);

    /** @brief Property set for group params */
    static PropertySetDescription gGroupParamPropSet("Group Parameter",
      mPropDescriptionArg(gBasicParamProps),
      mPropDescriptionArg(gGroupParamProps),
      NULLPTR);

    /** @brief Property set for page params */
    static PropertySetDescription gPageParamPropSet("Page Parameter",
      mPropDescriptionArg(gBasicParamProps),
      mPropDescriptionArg(gPageParamProps),
      NULLPTR);

    static PropertySetDescription gParametricParamPropSet("Parametric Parameter",
      mPropDescriptionArg(gBasicParamProps),
      mPropDescriptionArg(gInteractOverideParamProps),
      mPropDescriptionArg(gValueHolderParamProps),
      mPropDescriptionArg(gParametricParamProps),
      NULLPTR);

#endif
    /** @brief Validates the host structure and property handle */
    void
      validateHostProperties(OfxHost *host)
    {
#ifdef kOfxsDisableValidation
    (void)host;
#else
      // make a description set
      PropertySet props(host->host);
      gHostPropSet.validate(props);
#endif
    }

    /** @brief Validates the effect descriptor properties */
    void
      validatePluginDescriptorProperties(PropertySet props)
    {
#ifdef kOfxsDisableValidation
    (void)props;
#else
      gPluginDescriptorPropSet.validate(props);
#endif
    }

    /** @brief Validates the effect instance properties */
    void
      validatePluginInstanceProperties(PropertySet props)
    {
#ifdef kOfxsDisableValidation
    (void)props;
#else
      gPluginInstancePropSet.validate(props);
#endif
    }

    /** @brief validates a clip descriptor */
    void
      validateClipDescriptorProperties(PropertySet props)
    {
#ifdef kOfxsDisableValidation
    (void)props;
#else
      gClipDescriptorPropSet.validate(props);
#endif
    }

    /** @brief validates a clip instance */
    void
      validateClipInstanceProperties(PropertySet props)
    {
#ifdef kOfxsDisableValidation
    (void)props;
#else
      gClipInstancePropSet.validate(props);
#endif
    }

    /** @brief validates an image or texture instance */
    void
      validateImageBaseProperties(PropertySet props)
    {
#ifdef kOfxsDisableValidation
    (void)props;
#else
      gImageBaseInstancePropSet.validate(props);
#endif
    }

    /** @brief validates an image instance */
    void
      validateImageProperties(PropertySet props)
    {
#ifdef kOfxsDisableValidation
    (void)props;
#else
      gImageInstancePropSet.validate(props);
#endif
    }

#ifdef OFX_SUPPORTS_OPENGLRENDER
    /** @brief validates an OpenGL texture instance */
    void
      validateTextureProperties(PropertySet props)
    {
#ifdef kOfxsDisableValidation
    (void)props;
#else
      gTextureInstancePropSet.validate(props);
#endif
    }
#endif

    /** @brief Validates action in/out arguments */
    void
      validateActionArgumentsProperties(const std::string &action, PropertySet inArgs, PropertySet outArgs)
    {
#ifdef kOfxsDisableValidation
    (void)action;
    (void)inArgs;
    (void)outArgs;
#else
      if(action == kOfxActionInstanceChanged) {
        gInstanceChangedInArgPropSet.validate(inArgs);
      }
      else if(action == kOfxActionBeginInstanceChanged) {
        gBeginInstanceChangedInArgPropSet.validate(inArgs);
      }
      else if(action == kOfxActionEndInstanceChanged) {
        gEndInstanceChangedInArgPropSet.validate(inArgs);
      }
      else if(action == kOfxImageEffectActionGetRegionOfDefinition) {
        gGetRegionOfDefinitionInArgPropSet.validate(inArgs);
        gGetRegionOfDefinitionOutArgPropSet.validate(outArgs);
      }
      else if(action == kOfxImageEffectActionGetRegionsOfInterest) {
        gGetRegionOfInterestInArgPropSet.validate(inArgs);
      }
      else if(action == kOfxImageEffectActionGetTimeDomain) {
        gGetTimeDomainOutArgPropSet.validate(outArgs);
      }
      else if(action == kOfxImageEffectActionGetFramesNeeded) {
        gGetFramesNeededInArgPropSet.validate(inArgs);
      }
      else if(action == kOfxImageEffectActionGetClipPreferences) {
        gGetClipPreferencesOutArgPropSet.validate(outArgs);
      }
      else if(action == kOfxImageEffectActionIsIdentity) {
        gIsIdentityActionInArgPropSet.validate(inArgs);
        gIsIdentityActionOutArgPropSet.validate(outArgs);
      }
      else if(action == kOfxImageEffectActionRender) {
        gRenderActionInArgPropSet.validate(inArgs);
      }
      else if(action == kOfxImageEffectActionBeginSequenceRender) {
        gBeginSequenceRenderActionInArgPropSet.validate(inArgs);
      }
      else if(action == kOfxImageEffectActionEndSequenceRender) {
        gEndSequenceRenderActionInArgPropSet.validate(inArgs);
      }
      else if(action == kOfxImageEffectActionDescribeInContext) {
        gDescribeInContextActionInArgPropSet.validate(inArgs);
      }     
#endif 
    }

    /** @brief Validates parameter properties */
    void
      validateParameterProperties(ParamTypeEnum paramType, 
      OFX::PropertySet paramProps,
      bool checkDefaults)
    {
#ifdef kOfxsDisableValidation
    (void)paramType;
    (void)paramProps;
    (void)checkDefaults;
#else
      // should use a map here
      switch(paramType) 
      {
      case eStringParam :
        gStringParamPropSet.validate(paramProps, checkDefaults);
        break;
      case eIntParam :	
        gInt1DParamPropSet.validate(paramProps,  checkDefaults);
        break;
      case eInt2DParam :
        gInt2DParamPropSet.validate(paramProps, checkDefaults);
        break;
      case eInt3DParam :
        gInt3DParamPropSet.validate(paramProps, checkDefaults);
        break;
      case eDoubleParam :
        gDouble1DParamPropSet.validate(paramProps, checkDefaults);
        break;
      case eDouble2DParam :
        gDouble2DParamPropSet.validate(paramProps, checkDefaults);
        break;
      case eDouble3DParam :
        gDouble3DParamPropSet.validate(paramProps, checkDefaults);
        break;
      case eRGBParam :
        gRGBParamPropSet.validate(paramProps, checkDefaults);
        break;
      case eRGBAParam :
        gRGBAParamPropSet.validate(paramProps, checkDefaults);
        break;
      case eBooleanParam :
        gBooleanParamPropSet.validate(paramProps, checkDefaults);
        break;
      case eChoiceParam :
        gChoiceParamPropSet.validate(paramProps, checkDefaults);
        break;
      case eCustomParam :
        gCustomParamPropSet.validate(paramProps, checkDefaults);
        break;
      case eGroupParam :
        gGroupParamPropSet.validate(paramProps, checkDefaults);
        break;
      case ePageParam :
        gPageParamPropSet.validate(paramProps, checkDefaults);
        break;
      case ePushButtonParam :
        gPushButtonParamPropSet.validate(paramProps, checkDefaults);
        break;
      case eParametricParam:
        gParametricParamPropSet.validate(paramProps, checkDefaults);
        break;
      case eDummyParam:
      //default:
            break;
      }
#endif
    }

    ////////////////////////////////////////////////////////////////////////////////
    //

    /** @brief Initialises validation stuff that needs to be done once we know how the host behaves, called during the onload action */
    void
      initialise(void)
    {
#ifndef kOfxsDisableValidation
      static bool beenInitialised = false;
      if(!beenInitialised && getImageEffectHostDescription()) {
        beenInitialised = true;

        // create new property descriptions depending on certain host states
        PropertyDescription *desc;

        // do custom params animate ?
        desc = new PropertyDescription(kOfxParamPropAnimates, OFX::eInt, 1,
          eDescDefault, int(getImageEffectHostDescription()->supportsCustomAnimation),
          eDescFinished);
        gCustomParamPropSet.addProperty(desc, true);

        // do strings animate ?
        desc = new PropertyDescription(kOfxParamPropAnimates, OFX::eInt, 1,
          eDescDefault, int(getImageEffectHostDescription()->supportsStringAnimation),
          eDescFinished);
        gStringParamPropSet.addProperty(desc, true);

        // do choice params animate      
        desc = new PropertyDescription(kOfxParamPropAnimates, OFX::eInt, 1,
          eDescDefault, int(getImageEffectHostDescription()->supportsChoiceAnimation),
          eDescFinished);
        gChoiceParamPropSet.addProperty(desc, true);

        // do choice params animate      
        desc = new PropertyDescription(kOfxParamPropAnimates, OFX::eInt, 1,
          eDescDefault, int(getImageEffectHostDescription()->supportsBooleanAnimation),
          eDescFinished);
        gBooleanParamPropSet.addProperty(desc, true);
      }
#endif
    }
  };
};