1 /* Copyright 2017 The TensorFlow Authors. All Rights Reserved. 2 3 Licensed under the Apache License, Version 2.0 (the "License"); 4 you may not use this file except in compliance with the License. 5 You may obtain a copy of the License at 6 7 http://www.apache.org/licenses/LICENSE-2.0 8 9 Unless required by applicable law or agreed to in writing, software 10 distributed under the License is distributed on an "AS IS" BASIS, 11 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 See the License for the specific language governing permissions and 13 limitations under the License. 14 ==============================================================================*/ 15 16 // Basic minimal DCT class for MFCC speech processing. 17 18 #ifndef TENSORFLOW_CORE_KERNELS_MFCC_DCT_H_ 19 #define TENSORFLOW_CORE_KERNELS_MFCC_DCT_H_ 20 21 #include <vector> 22 23 #include "tensorflow/core/framework/op_kernel.h" 24 25 namespace tensorflow { 26 27 class MfccDct { 28 public: 29 MfccDct(); 30 bool Initialize(int input_length, int coefficient_count); 31 void Compute(const std::vector<double>& input, 32 std::vector<double>* output) const; 33 34 private: 35 bool initialized_; 36 int coefficient_count_; 37 int input_length_; 38 std::vector<std::vector<double> > cosines_; 39 TF_DISALLOW_COPY_AND_ASSIGN(MfccDct); 40 }; 41 42 } // namespace tensorflow 43 44 #endif // TENSORFLOW_CORE_KERNELS_MFCC_DCT_H_ 45