1 /* 2 * Copyright 2013 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 INTERPOLATOR_H_ 18 #define INTERPOLATOR_H_ 19 20 #include <jni.h> 21 #include <errno.h> 22 #include <time.h> 23 #include "JNIHelper.h" 24 #include "perfMonitor.h" 25 #include <list> 26 27 namespace ndk_helper 28 { 29 30 enum INTERPOLATOR_TYPE 31 { 32 INTERPOLATOR_TYPE_LINEAR, 33 INTERPOLATOR_TYPE_EASEINQUAD, 34 INTERPOLATOR_TYPE_EASEOUTQUAD, 35 INTERPOLATOR_TYPE_EASEINOUTQUAD, 36 INTERPOLATOR_TYPE_EASEINCUBIC, 37 INTERPOLATOR_TYPE_EASEOUTCUBIC, 38 INTERPOLATOR_TYPE_EASEINOUTCUBIC, 39 INTERPOLATOR_TYPE_EASEINQUART, 40 INTERPOLATOR_TYPE_EASEINEXPO, 41 INTERPOLATOR_TYPE_EASEOUTEXPO, 42 }; 43 44 struct InterpolatorParams 45 { 46 float dest_value_; 47 INTERPOLATOR_TYPE type_; 48 double duration_; 49 }; 50 51 /****************************************************************** 52 * Interpolates values with several interpolation methods 53 */ 54 class Interpolator 55 { 56 private: 57 double start_time_; 58 double dest_time_; 59 INTERPOLATOR_TYPE type_; 60 61 float start_value_; 62 float dest_value_; 63 std::list<InterpolatorParams> list_params_; 64 65 float GetFormula( const INTERPOLATOR_TYPE type, 66 const float t, 67 const float b, 68 const float d, 69 const float c ); 70 public: 71 Interpolator(); 72 ~Interpolator(); 73 74 Interpolator& Set( const float start, 75 const float dest, 76 const INTERPOLATOR_TYPE type, 77 double duration ); 78 79 Interpolator& Add( const float dest, 80 const INTERPOLATOR_TYPE type, 81 const double duration ); 82 83 bool Update( const double currentTime, float& p ); 84 85 void Clear(); 86 }; 87 88 } //namespace ndkHelper 89 #endif /* INTERPOLATOR_H_ */ 90