text: /*
   * Copyright (c) 2018 Intel Corporation
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * 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.
   */
  
  /**
   * @brief A header file with declaration for EmotionsDetection Class
   * @file emotions_detection.h
   */
  #ifndef VINO_CORE_LIB__INFERENCES__EMOTIONS_DETECTION_H
  #define VINO_CORE_LIB__INFERENCES__EMOTIONS_DETECTION_H
  
  #include <memory>
  #include <string>
  #include <vector>
  
  #include "vino_core_lib/engines/engine.h"
  #include "vino_core_lib/inferences/base_inference.h"
  #include "vino_core_lib/models/emotion_detection_model.h"
  #include "inference_engine.hpp"
  #include "opencv2/opencv.hpp"
  
  namespace Outputs
  {
  class BaseOuput;
  }
  namespace vino_core_lib
  {
  /**
   * @class EmotionResult
   * @brief Class for storing and processing emotion detection result.
   */
  class EmotionsResult : public Result
  {
  public:
    friend class EmotionsDetection;
    explicit EmotionsResult(const cv::Rect& location);
    /**
     * @brief Get the emotion label of the detected person.
     * @return The predictea emotion label.
     */
    std::string getLabel() const
    {
      return label_;
    }
  
  private:
    std::string label_ = "";
    float confidence_ = -1;
  };
  
  /**
   * @class EmotionDetection
   * @brief Class to load emotion detection model and perform emotion detection.
   */
  class EmotionsDetection : public BaseInference
  {
  public:
    using Result = vino_core_lib::EmotionsResult;
    EmotionsDetection();
    ~EmotionsDetection() override;
    /**
     * @brief Load the emotin detection model.
     */
    void loadNetwork(std::shared_ptr<Models::EmotionDetectionModel>);
    /**
     * @brief Enqueue a frame to this class.
     * The frame will be buffered but not infered yet.
     * @param[in] frame The frame to be enqueued.
     * @param[in] input_frame_loc The location of the enqueued frame with respect
     * to the frame generated by the input device.
     * @return Whether this operation is successful.
     */
    bool enqueue(const cv::Mat&, const cv::Rect&) override;
    /**
     * @brief Start inference for all buffered frames.
     * @return Whether this operation is successful.
     */
    bool submitRequest() override;
    /**
     * @brief This function will fetch the results of the previous inference and
     * stores the results in a result buffer array. All buffered frames will be
     * cleared.
     * @return Whether the Inference object fetches a result this time
     */
    bool fetchResults() override;
    /**
     * @brief Get the length of the buffer result array.
     * @return The length of the buffer result array.
     */
    int getResultsLength() const override;
    /**
     * @brief Get the location of result with respect
     * to the frame generated by the input device.
     * @param[in] idx The index of the result.
     */
    const vino_core_lib::Result* getLocationResult(int idx) const override;
    /**
     * @brief Get the name of the Inference instance.
     * @return The name of the Inference instance.
     */
    const std::string getName() const override;
    /**
     * @brief Show the observed detection result either through image window
     * or ROS topic.
     */
    void observeOutput(const std::shared_ptr<Outputs::BaseOutput>& output) override;
  
    std::vector<Result> getResults()
    {
      return results_;
    }
    const std::vector<cv::Rect> getFilteredROIs(const std::string filter_conditions) const override;
  
  private:
    std::shared_ptr<Models::EmotionDetectionModel> valid_model_;
    std::vector<Result> results_;
  };
  }  // namespace vino_core_lib
  
  #endif  // VINO_CORE_LIB__INFERENCES__EMOTIONS_DETECTION_H
  