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/*
* Copyright (c) 2019 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.
*/
#include "video/unique_timestamp_counter.h"
#include <cstdint>
#include <memory>
#include <set>
namespace webrtc {
namespace {
constexpr int kMaxHistory = 1000;
} // namespace
UniqueTimestampCounter::UniqueTimestampCounter()
: latest_(std::make_unique<uint32_t[]>(kMaxHistory)) {}
void UniqueTimestampCounter::Add(uint32_t value) {
if (value == last_ || !search_index_.insert(value).second) {
// Already known.
return;
}
int index = unique_seen_ % kMaxHistory;
if (unique_seen_ >= kMaxHistory) {
search_index_.erase(latest_[index]);
}
latest_[index] = value;
last_ = value;
++unique_seen_;
}
} // namespace webrtc
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