// Copyright (c) 2020 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.

#ifndef CORE_PREPROCESS_HWVIDEOFRAME_INCLUDE_NORMALIZE_H_
#define CORE_PREPROCESS_HWVIDEOFRAME_INCLUDE_NORMALIZE_H_

#include <npp.h>
#include <memory>
#include <vector>

#include "core/preprocess/hwvideoframe/include/op_context.h"

// utilize normalize operator on gpu
class Normalize {
 public:
  Normalize(const std::vector<float> &mean,
            const std::vector<float> &std,
            bool channel_first = false);
  std::shared_ptr<OpContext> operator()(std::shared_ptr<OpContext> input);

 private:
  Npp32f _mean[CHANNEL_SIZE];
  Npp32f _std[CHANNEL_SIZE];
  bool _channel_first;  // indicate whether the channel is dimension 0,
                        // unsupported
};

#endif  // CORE_PREPROCESS_HWVIDEOFRAME_INCLUDE_NORMALIZE_H_