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/*
* Copyright (C) 2017 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 ANDROID_SERVERS_CAMERA_LATENCY_HISTOGRAM_H_
#define ANDROID_SERVERS_CAMERA_LATENCY_HISTOGRAM_H_
#include <vector>
#include <utils/Timers.h>
#include <utils/Mutex.h>
namespace android {
// Histogram for camera latency characteristic
class CameraLatencyHistogram {
public:
CameraLatencyHistogram() = delete;
CameraLatencyHistogram(int32_t binSizeMs, int32_t binCount=10);
void add(nsecs_t start, nsecs_t end);
void reset();
void dump(int fd, const char* name) const;
void log(const char* format, ...);
private:
int32_t mBinSizeMs;
int32_t mBinCount;
std::vector<int64_t> mBins;
uint64_t mTotalCount;
void formatHistogramText(String8& lineBins, String8& lineBinCounts) const;
}; // class CameraLatencyHistogram
}; // namespace android
#endif // ANDROID_SERVERS_CAMERA_LATENCY_HISTOGRAM_H_