text: /* Copyright (c) 2019 PaddlePaddle Authors. All Rights Reserved.
  
  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. */
  
  #pragma once
  
  #include <vector>
  
  #include "lite/backends/fpga/KD/alignment.h"
  
  namespace paddle {
  namespace zynqmp {
  
  enum LayoutType {
    None,
    N,
    NC,
    NCHW,
    CNHW,
    NHWC,
    NHW,
  };
  
  class Layout {
   public:
    virtual int numIndex() = 0;
    virtual int channelIndex() { return -1; }
    virtual int heightIndex() { return -1; }
    virtual int widthIndex() { return -1; }
    virtual int alignedElementCount(const std::vector<int>& dims) = 0;
    virtual int elementCount(const std::vector<int>& dims) = 0;
    virtual bool isCompatibleWith(LayoutType new_layout) = 0;
  };
  
  struct None : Layout {
    int numIndex() { return -1; }
    int channelIndex() { return -1; }
    int heightIndex() { return -1; }
    int widthIndex() { return -1; }
    int alignedElementCount(const std::vector<int>& dims) { return 16; }
    virtual int elementCount(const std::vector<int>& dims) { return 1; }
    bool isCompatibleWith(LayoutType new_layout) {
      if (new_layout == LayoutType::None) return true;
      return false;
    }
  };
  
  struct NCHW : Layout {
    int numIndex() { return 0; }
    int channelIndex() { return 1; }
    int heightIndex() { return 2; }
    int widthIndex() { return 3; }
    int alignedElementCount(const std::vector<int>& dims) {
      return dims[0] * dims[2] * align_image(dims[1] * dims[3]);
    }
    virtual int elementCount(const std::vector<int>& dims) {
      return dims[0] * dims[1] * dims[2] * dims[3];
    }
    bool isCompatibleWith(LayoutType new_layout) {
      if (new_layout == LayoutType::NCHW || new_layout == LayoutType::CNHW ||
          new_layout == LayoutType::NHWC)
        return true;
      return false;
    }
  };
  
  struct NHWC : Layout {
    int numIndex() { return 0; }
    int heightIndex() { return 1; }
    int widthIndex() { return 2; }
    int channelIndex() { return 3; }
    int alignedElementCount(const std::vector<int>& dims) {
      return dims[0] * dims[1] * align_image(dims[2] * dims[3]);
    }
    virtual int elementCount(const std::vector<int>& dims) {
      return dims[0] * dims[1] * dims[2] * dims[3];
    }
    bool isCompatibleWith(LayoutType new_layout) {
      if (new_layout == LayoutType::NCHW || new_layout == LayoutType::CNHW ||
          new_layout == LayoutType::NHWC)
        return true;
      return false;
    }
  };
  
  struct CNHW : Layout {
    int numIndex() { return 1; }
    int channelIndex() { return 0; }
    int heightIndex() { return 2; }
    int widthIndex() { return 3; }
    int alignedElementCount(const std::vector<int>& dims) {
      return dims[1] * dims[2] * align_image(dims[0] * dims[3]);
    }
    int elementCount(const std::vector<int>& dims) {
      return dims[0] * dims[1] * dims[2] * dims[3];
    }
    bool isCompatibleWith(LayoutType new_layout) {
      if (new_layout == LayoutType::NCHW || new_layout == LayoutType::CNHW ||
          new_layout == LayoutType::NHWC)
        return true;
      return false;
    }
  };
  
  struct NC : Layout {
    int numIndex() { return 0; }
    int channelIndex() { return 1; }
    int alignedElementCount(const std::vector<int>& dims) {
      return dims[0] * dims[1];
    }
    virtual int elementCount(const std::vector<int>& dims) {
      return dims[0] * dims[1];
    }
    bool isCompatibleWith(LayoutType new_layout) {
      if (new_layout == LayoutType::NC) return true;
      return false;
    }
  };
  
  struct N : Layout {
    int numIndex() { return 0; }
    int alignedElementCount(const std::vector<int>& dims) { return dims[0]; }
    virtual int elementCount(const std::vector<int>& dims) { return dims[0]; }
  
    bool isCompatibleWith(LayoutType new_layout) {
      if (new_layout == LayoutType::N) return true;
      return false;
    }
  };
  
  struct NHW : Layout {
    int numIndex() { return 0; }
    int heightIndex() { return 1; }
    int widthIndex() { return 2; }
    int alignedElementCount(const std::vector<int>& dims) {
      // TODO(chonwhite) align it;
      return dims[0] * dims[1] * dims[2];
    }
    virtual int elementCount(const std::vector<int>& dims) {
      return dims[0] * dims[1] * dims[2];
    }
  
    bool isCompatibleWith(LayoutType new_layout) {
      if (new_layout == LayoutType::NHW) return true;
      return false;
    }
  };
  
  }  // namespace zynqmp
  }  // namespace paddle
  