VstParameters.h

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/*
 * Copyright (c) 2018 pongasoft
 *
 * Licensed under the Apache License, Version 2.0 or the MIT license,
 * at your option. You may not use this file except in compliance with
 * one of these licenses. You may obtain copies of the licenses at:
 *
 * https://www.apache.org/licenses/LICENSE-2.0
 * https://opensource.org/licenses/MIT
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 *
 * @author Yan Pujante
 */
#pragma once
 
#include <pongasoft/logging/logging.h>
 
#include <public.sdk/source/vst/vsteditcontroller.h>
#include <memory>
#include "GUIParamCx.h"
 
namespace pongasoft::VST::GUI::Params {
 
using namespace Steinberg;
using namespace Steinberg::Vst;

class VstParameters
{
public:
  explicit VstParameters(EditController *const iParametersOwner) : fParametersOwner{iParametersOwner}
  {
    DCHECK_NOTNULL_F(iParametersOwner);
  }
 
  // getParamNormalized
  ParamValue getParamNormalized(ParamID iParamID) const { return fParametersOwner->getParamNormalized(iParamID); }
  tresult setParamNormalized(ParamID iParamID, ParamValue iValue) const { return fParametersOwner->setParamNormalized(iParamID, iValue); }
  tresult beginEdit(ParamID iParamID) const { return fParametersOwner->beginEdit(iParamID); }
  tresult performEdit(ParamID iParamID, ParamValue iValue) const { return fParametersOwner->performEdit(iParamID, iValue); }
  tresult endEdit(ParamID iParamID) const { return fParametersOwner->endEdit(iParamID); }
  Vst::Parameter *getParameterObject(ParamID iParamID) const { return fParametersOwner->getParameterObject(iParamID); }

  Vst::ParameterInfo const *getParameterInfo(ParamID iParamID) const {
    auto parameter = getParameterObject(iParamID);
    return parameter ? &parameter->getInfo() : nullptr;
  }
 

  std::unique_ptr<FObjectCx> connect(ParamID iParamID, Parameters::IChangeListener *iChangeListener)
  {
    if(exists(iParamID))
      return std::make_unique<GUIParamCx>(iParamID,
                                          getParameterObject(iParamID),
                                          iChangeListener);
    else
      return nullptr;
  }

  std::unique_ptr<FObjectCx> connect(ParamID iParamID, Parameters::ChangeCallback iChangeCallback) const
  {
    if(exists(iParamID))
      return std::make_unique<FObjectCxCallback>(getParameterObject(iParamID),
                                                 std::move(iChangeCallback));
    else
      return nullptr;
  }
 
  // exists
  bool exists(ParamID iParamID) const { return getParameterObject(iParamID) != nullptr; }
 
private:
  EditController *const fParametersOwner;
};
 
using VstParametersSPtr = std::shared_ptr<VstParameters>;
 
}