| /* Copyright 2017 The TensorFlow 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. |
| ==============================================================================*/ |
| |
| // Basic minimal DCT class for MFCC speech processing. |
| |
| #ifndef TENSORFLOW_CORE_KERNELS_MFCC_DCT_H_ |
| #define TENSORFLOW_CORE_KERNELS_MFCC_DCT_H_ |
| |
| #include <vector> |
| |
| #include "tensorflow/core/framework/op_kernel.h" |
| |
| namespace tensorflow { |
| |
| class MfccDct { |
| public: |
| MfccDct(); |
| bool Initialize(int input_length, int coefficient_count); |
| void Compute(const std::vector<double>& input, |
| std::vector<double>* output) const; |
| |
| private: |
| bool initialized_; |
| int coefficient_count_; |
| int input_length_; |
| std::vector<std::vector<double> > cosines_; |
| TF_DISALLOW_COPY_AND_ASSIGN(MfccDct); |
| }; |
| |
| } // namespace tensorflow |
| |
| #endif // TENSORFLOW_CORE_KERNELS_MFCC_DCT_H_ |