42 lines
1.1 KiB
C++
42 lines
1.1 KiB
C++
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/*
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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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#include "modules/video_coding/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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namespace {
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constexpr int kMaxHistory = 1000;
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} // namespace
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UniqueTimestampCounter::UniqueTimestampCounter()
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: latest_(std::make_unique<uint32_t[]>(kMaxHistory)) {}
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void UniqueTimestampCounter::Add(uint32_t value) {
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if (value == last_ || !search_index_.insert(value).second) {
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// Already known.
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return;
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}
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int index = unique_seen_ % kMaxHistory;
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if (unique_seen_ >= kMaxHistory) {
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search_index_.erase(latest_[index]);
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}
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latest_[index] = value;
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last_ = value;
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++unique_seen_;
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}
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} // namespace webrtc
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