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/*
* Copyright (C) 2018 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef HISTOGRAM_HISTOGRAM_COLLECTOR_H_
#define HISTOGRAM_HISTOGRAM_COLLECTOR_H_
#include <string>
#include <thread>
#define HWC2_INCLUDE_STRINGIFICATION
#define HWC2_USE_CPP11
#include <hardware/hwcomposer2.h>
#undef HWC2_INCLUDE_STRINGIFICATION
#undef HWC2_USE_CPP11
//number of enums in hwc2_format_color_component_t;
#define NUM_HISTOGRAM_COLOR_COMPONENTS 4
namespace histogram {
class Ringbuffer;
class HistogramCollector
{
public:
HistogramCollector();
~HistogramCollector();
void start();
void start(uint64_t max_frames);
void stop();
std::string Dump() const;
HWC2::Error collect(uint64_t max_frames,
uint64_t timestamp,
int32_t samples_size[NUM_HISTOGRAM_COLOR_COMPONENTS],
uint64_t* samples[NUM_HISTOGRAM_COLOR_COMPONENTS],
uint64_t* numFrames) const;
HWC2::Error getAttributes(int32_t* format,
int32_t* dataspace,
uint8_t* supported_components) const;
private:
HistogramCollector(HistogramCollector const&) = delete;
HistogramCollector& operator=(HistogramCollector const&) = delete;
void collecting_thread(int pipe);
std::mutex thread_control;
bool started = false;
std::thread monitoring_thread;
int selfpipe[2];
std::unique_ptr<histogram::Ringbuffer> histogram;
};
} // namespace histogram
#endif // HISTOGRAM_HISTOGRAM_COLLECTOR_H_