1 /* 2 * Copyright (C) 2015 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 FRAME_DROPPER_H_ 18 19 #define FRAME_DROPPER_H_ 20 21 #include <utils/Errors.h> 22 #include <utils/RefBase.h> 23 24 #include <media/stagefright/foundation/ABase.h> 25 26 namespace android { 27 28 struct FrameDropper : public RefBase { 29 // No frames will be dropped until a valid max frame rate is set. 30 FrameDropper(); 31 32 // maxFrameRate required to be positive. 33 status_t setMaxFrameRate(float maxFrameRate); 34 35 // Returns false if max frame rate has not been set via setMaxFrameRate. 36 bool shouldDrop(int64_t timeUs); 37 38 protected: 39 virtual ~FrameDropper(); 40 41 private: 42 int64_t mDesiredMinTimeUs; 43 int64_t mMinIntervalUs; 44 45 DISALLOW_EVIL_CONSTRUCTORS(FrameDropper); 46 }; 47 48 } // namespace android 49 50 #endif // FRAME_DROPPER_H_ 51
