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#ifndef TIM_VX_OPS_ROI_POOL_H_
#define TIM_VX_OPS_ROI_POOL_H_

#include <array>
#include "tim/vx/direct_map_op.h"
#include "tim/vx/types.h"

namespace tim {
namespace vx {
namespace ops {

/**
 * ## ROI_POOL
 *
 * Select and scale the feature map of each region of interest to a unified output
 * size by max-pooling.
 * 
 *    pool_type : only support max-pooling  (MAX)
 *    scale : The ratio of image to feature map (Range: 0 < scale <= 1) 
 *    size : The size of roi pooling (height/width)
 *
 */

class ROI_Pool : public DirectMapOp {
 public:
  ROI_Pool(Graph* graph, PoolType type, float scale,
            const std::array<uint32_t, 2>& size);

  std::shared_ptr<Operation> Clone(
      std::shared_ptr<Graph>& graph) const override;

 protected:
  const PoolType type_;
  const float scale_;
  std::array<uint32_t, 2> size_;
};

}  // namespace ops
}  // namespace vx
}  // namespace tim

#endif /* TIM_VX_OPS_ROI_POOL_H_ */