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/* Copyright (c) 2018 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef MODULES_AUDIO_CODING_NETEQ_EXPAND_UMA_LOGGER_H_
#define MODULES_AUDIO_CODING_NETEQ_EXPAND_UMA_LOGGER_H_
#include <stdint.h>
#include <memory>
#include <string>
#include "absl/strings/string_view.h"
#include "absl/types/optional.h"
#include "api/neteq/tick_timer.h"
namespace webrtc {
// This class is used to periodically log values to a UMA histogram. The caller
// is expected to update this class with an incremental sample counter which
// counts expand samples. At the end of each logging period, the class will
// calculate the fraction of samples that were expand samples during that period
// and report that in percent. The logging period must be strictly positive.
// Does not take ownership of tick_timer and the pointer must refer to a valid
// object that outlives the one constructed.
class ExpandUmaLogger {
public:
ExpandUmaLogger(absl::string_view uma_name,
int logging_period_s,
const TickTimer* tick_timer);
~ExpandUmaLogger();
ExpandUmaLogger(const ExpandUmaLogger&) = delete;
ExpandUmaLogger& operator=(const ExpandUmaLogger&) = delete;
// In this call, value should be an incremental sample counter. The sample
// rate must be strictly positive.
void UpdateSampleCounter(uint64_t value, int sample_rate_hz);
private:
const std::string uma_name_;
const int logging_period_s_;
const TickTimer& tick_timer_;
std::unique_ptr<TickTimer::Countdown> timer_;
absl::optional<uint64_t> last_logged_value_;
uint64_t last_value_ = 0;
int sample_rate_hz_ = 0;
};
} // namespace webrtc
#endif // MODULES_AUDIO_CODING_NETEQ_EXPAND_UMA_LOGGER_H_
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