1 /* 2 * Copyright (C) 2018 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 HISTOGRAM_HISTOGRAM_COLLECTOR_H_ 18 #define HISTOGRAM_HISTOGRAM_COLLECTOR_H_ 19 #include <string> 20 #include <thread> 21 #define HWC2_INCLUDE_STRINGIFICATION 22 #define HWC2_USE_CPP11 23 #include <hardware/hwcomposer2.h> 24 #undef HWC2_INCLUDE_STRINGIFICATION 25 #undef HWC2_USE_CPP11 26 27 //number of enums in hwc2_format_color_component_t; 28 #define NUM_HISTOGRAM_COLOR_COMPONENTS 4 29 30 namespace histogram { 31 32 class Ringbuffer; 33 class HistogramCollector 34 { 35 public: 36 HistogramCollector(); 37 ~HistogramCollector(); 38 39 void start(); 40 void start(uint64_t max_frames); 41 void stop(); 42 43 std::string Dump() const; 44 45 HWC2::Error collect(uint64_t max_frames, 46 uint64_t timestamp, 47 int32_t samples_size[NUM_HISTOGRAM_COLOR_COMPONENTS], 48 uint64_t* samples[NUM_HISTOGRAM_COLOR_COMPONENTS], 49 uint64_t* numFrames) const; 50 HWC2::Error getAttributes(int32_t* format, 51 int32_t* dataspace, 52 uint8_t* supported_components) const; 53 54 private: 55 HistogramCollector(HistogramCollector const&) = delete; 56 HistogramCollector& operator=(HistogramCollector const&) = delete; 57 void collecting_thread(int pipe); 58 59 std::mutex thread_control; 60 bool started = false; 61 std::thread monitoring_thread; 62 int selfpipe[2]; 63 64 std::unique_ptr<histogram::Ringbuffer> histogram; 65 66 }; 67 68 } // namespace histogram 69 70 #endif // HISTOGRAM_HISTOGRAM_COLLECTOR_H_ 71