1 /* 2 * Copyright (C) 2021 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 A_JITTER_CALCULATOR_H_ 18 19 #define A_JITTER_CALCULATOR_H_ 20 21 #include <stdint.h> 22 #include <utils/RefBase.h> 23 24 namespace android { 25 26 class JitterCalc : public RefBase { 27 private: 28 // Time Stamp per Second 29 const int32_t mClockRate; 30 31 uint32_t mFirstTimeStamp; 32 uint32_t mLastTimeStamp; 33 int64_t mFirstArrivalTimeUs; 34 int64_t mLastArrivalTimeUs; 35 36 int32_t mBaseJitterUs; 37 int32_t mInterArrivalJitterUs; 38 39 public: 40 JitterCalc(int32_t clockRate); 41 42 void init(uint32_t rtpTime, int64_t arrivalTimeUs, int32_t base, int32_t inter); 43 void putInterArrivalData(int64_t rtpTime, int64_t arrivalTime); 44 void putBaseData(int64_t rtpTime, int64_t arrivalTimeUs); 45 int32_t getBaseJitterMs(); 46 int32_t getInterArrivalJitterMs(); 47 }; 48 49 } // namespace android 50 51 #endif // A_JITTER_CALCULATOR_H_ 52