45 lines
1.5 KiB
C++
45 lines
1.5 KiB
C++
/*
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* Copyright (c) 2019 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef VIDEO_UNIQUE_TIMESTAMP_COUNTER_H_
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#define VIDEO_UNIQUE_TIMESTAMP_COUNTER_H_
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#include <cstdint>
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#include <memory>
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#include <set>
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namespace webrtc {
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// Counts number of uniquely seen frames (aka pictures, aka temporal units)
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// identified by their rtp timestamp.
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class UniqueTimestampCounter {
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public:
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UniqueTimestampCounter();
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UniqueTimestampCounter(const UniqueTimestampCounter&) = delete;
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UniqueTimestampCounter& operator=(const UniqueTimestampCounter&) = delete;
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~UniqueTimestampCounter() = default;
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void Add(uint32_t timestamp);
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// Returns number of different `timestamp` passed to the UniqueCounter.
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int GetUniqueSeen() const { return unique_seen_; }
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private:
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int unique_seen_ = 0;
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// Stores several last seen unique values for quick search.
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std::set<uint32_t> search_index_;
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// The same unique values in the circular buffer in the insertion order.
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std::unique_ptr<uint32_t[]> latest_;
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// Last inserted value for optimization purpose.
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int64_t last_ = -1;
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};
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} // namespace webrtc
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#endif // VIDEO_UNIQUE_TIMESTAMP_COUNTER_H_
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