/* Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserve.

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 "ConvBaseLayer.h"
#include "paddle/math/Matrix.h"

namespace paddle {

/**
 * @brief A subclass of ConvBaseLayer that is a superclass of both
 * ExpandConvLayer and ExpandConvTransLayer
 */
class ExpandConvBaseLayer : public ConvBaseLayer {
protected:
  /// The transpose of output, which is an auxiliary matrix.
  MatrixPtr transOutValue_;

public:
  explicit ExpandConvBaseLayer(const LayerConfig& config)
      : ConvBaseLayer(config) {}

  ~ExpandConvBaseLayer() {}

  bool init(const LayerMap& layerMap,
            const ParameterMap& parameterMap) override;

  size_t getOutputSize();

  /**
   * Add shared bias.
   */
  void addSharedBias();

  /**
   * Add unshared bias.
   */
  void addUnsharedBias();

  void bpropSharedBias(MatrixPtr biases, MatrixPtr v);
  void bpropBiases(MatrixPtr v);
};

}  // namespace paddle