chromium/cc/metrics/dropped_frame_counter.h

// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/351564777): Remove this and convert code to safer constructs.
#pragma allow_unsafe_buffers
#endif

#ifndef CC_METRICS_DROPPED_FRAME_COUNTER_H_
#define CC_METRICS_DROPPED_FRAME_COUNTER_H_

#include <stddef.h>

#include <map>
#include <optional>
#include <queue>
#include <utility>
#include <vector>

#include "base/containers/ring_buffer.h"
#include "base/functional/callback_forward.h"
#include "base/memory/raw_ptr.h"
#include "base/time/time.h"
#include "cc/cc_export.h"
#include "cc/metrics/frame_info.h"
#include "cc/metrics/frame_sorter.h"
#include "cc/metrics/ukm_smoothness_data.h"

namespace cc {
class TotalFrameCounter;

// This class maintains a counter for produced/dropped frames, and can be used
// to estimate the recent throughput.
class CC_EXPORT DroppedFrameCounter { … };

CC_EXPORT std::ostream& operator<<(
    std::ostream&,
    const DroppedFrameCounter::SlidingWindowHistogram&);

}  // namespace cc

#endif  // CC_METRICS_DROPPED_FRAME_COUNTER_H_