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 PERFMONITOR_H_ 18 #define PERFMONITOR_H_ 19 20 #include <jni.h> 21 #include <errno.h> 22 #include <time.h> 23 #include "JNIHelper.h" 24 25 namespace ndk_helper 26 { 27 28 const int32_t NUM_SAMPLES = 100; 29 30 /****************************************************************** 31 * Helper class for a performance monitoring and get current tick time 32 */ 33 class PerfMonitor 34 { 35 private: 36 float current_FPS_; 37 time_t tv_last_sec_; 38 39 double last_tick_; 40 int32_t tickindex_; 41 double ticksum_; 42 double ticklist_[NUM_SAMPLES]; 43 44 double UpdateTick( double current_tick ); 45 public: 46 PerfMonitor(); 47 virtual ~PerfMonitor(); 48 49 bool Update( float &fFPS ); 50 51 static double GetCurrentTime() 52 { 53 struct timeval time; 54 gettimeofday( &time, NULL ); 55 double ret = time.tv_sec + time.tv_usec * 1.0 / 1000000.0; 56 return ret; 57 } 58 }; 59 60 } //namespace ndkHelper 61 #endif /* PERFMONITOR_H_ */ 62
