Lakshmi Narayana Kalavala | 25fe12c | 2019-12-11 20:44:55 -0800 | [diff] [blame] | 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 <android-base/thread_annotations.h> |
| 20 | #include <condition_variable> |
| 21 | #include <mutex> |
| 22 | #include <string> |
| 23 | #include <thread> |
| 24 | #define HWC2_INCLUDE_STRINGIFICATION |
| 25 | #define HWC2_USE_CPP11 |
| 26 | #include <hardware/hwcomposer2.h> |
| 27 | #undef HWC2_INCLUDE_STRINGIFICATION |
| 28 | #undef HWC2_USE_CPP11 |
| 29 | |
| 30 | // number of enums in hwc2_format_color_component_t; |
| 31 | #define NUM_HISTOGRAM_COLOR_COMPONENTS 4 |
| 32 | |
| 33 | namespace histogram { |
| 34 | typedef uint32_t BlobId; |
| 35 | |
| 36 | class Ringbuffer; |
| 37 | class HistogramCollector { |
| 38 | public: |
| 39 | HistogramCollector(); |
| 40 | ~HistogramCollector(); |
| 41 | |
| 42 | void start(); |
| 43 | void start(uint64_t max_frames); |
| 44 | void stop(); |
| 45 | |
| 46 | void notify_histogram_event(int blob_source_fd, BlobId id); |
| 47 | |
| 48 | std::string Dump() const; |
| 49 | |
| 50 | HWC2::Error collect(uint64_t max_frames, uint64_t timestamp, |
| 51 | int32_t samples_size[NUM_HISTOGRAM_COLOR_COMPONENTS], |
| 52 | uint64_t *samples[NUM_HISTOGRAM_COLOR_COMPONENTS], uint64_t *numFrames) const; |
| 53 | HWC2::Error getAttributes(int32_t *format, int32_t *dataspace, |
| 54 | uint8_t *supported_components) const; |
| 55 | |
| 56 | private: |
| 57 | HistogramCollector(HistogramCollector const &) = delete; |
| 58 | HistogramCollector &operator=(HistogramCollector const &) = delete; |
| 59 | void blob_processing_thread(); |
| 60 | |
| 61 | std::condition_variable cv; |
| 62 | std::mutex mutable mutex; |
| 63 | bool started /* GUARDED_BY(mutex) */ = false; |
| 64 | |
| 65 | struct BlobWork { |
| 66 | int fd; /* non-owning! */ |
| 67 | BlobId id; |
| 68 | } blobwork /* GUARDED_BY(mutex) */; |
| 69 | // no optional in c++14. |
| 70 | bool work_available = false; /* GUARDED_BY(mutex) */ |
| 71 | ; |
| 72 | |
| 73 | std::thread monitoring_thread; |
| 74 | |
| 75 | std::unique_ptr<histogram::Ringbuffer> histogram; |
| 76 | }; |
| 77 | |
| 78 | } // namespace histogram |
| 79 | |
| 80 | #endif // HISTOGRAM_HISTOGRAM_COLLECTOR_H_ |