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 | |