1 /* 2 * Copyright 2019 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef RESAMPLER_LINEAR_RESAMPLER_H 18 #define RESAMPLER_LINEAR_RESAMPLER_H 19 20 #include <memory> 21 #include <sys/types.h> 22 #include <unistd.h> 23 24 #include "MultiChannelResampler.h" 25 #include "ResamplerDefinitions.h" 26 27 namespace RESAMPLER_OUTER_NAMESPACE::resampler { 28 29 /** 30 * Simple resampler that uses bi-linear interpolation. 31 */ 32 class LinearResampler : public MultiChannelResampler { 33 public: 34 explicit LinearResampler(const MultiChannelResampler::Builder &builder); 35 36 void writeFrame(const float *frame) override; 37 38 void readFrame(float *frame) override; 39 40 private: 41 std::unique_ptr<float[]> mPreviousFrame; 42 std::unique_ptr<float[]> mCurrentFrame; 43 }; 44 45 } /* namespace RESAMPLER_OUTER_NAMESPACE::resampler */ 46 47 #endif //RESAMPLER_LINEAR_RESAMPLER_H 48