1 /* 2 * Copyright (C) 2017 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 ANDROID_SERVERS_CAMERA_LATENCY_HISTOGRAM_H_ 18 #define ANDROID_SERVERS_CAMERA_LATENCY_HISTOGRAM_H_ 19 20 #include <vector> 21 22 #include <utils/Timers.h> 23 #include <utils/Mutex.h> 24 25 namespace android { 26 27 // Histogram for camera latency characteristic 28 class CameraLatencyHistogram { 29 public: 30 CameraLatencyHistogram() = delete; 31 CameraLatencyHistogram(int32_t binSizeMs, int32_t binCount=10); 32 void add(nsecs_t start, nsecs_t end); 33 void reset(); 34 35 void dump(int fd, const char* name) const; 36 void log(const char* format, ...); 37 private: 38 int32_t mBinSizeMs; 39 int32_t mBinCount; 40 std::vector<int64_t> mBins; 41 uint64_t mTotalCount; 42 43 void formatHistogramText(String8& lineBins, String8& lineBinCounts) const; 44 }; // class CameraLatencyHistogram 45 46 }; // namespace android 47 48 #endif // ANDROID_SERVERS_CAMERA_LATENCY_HISTOGRAM_H_ 49