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/*
* Copyright 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 "logging/rtc_event_log/rtc_event_processor.h"
#include <algorithm>
#include <cstdint>
#include <optional>
#include "rtc_base/numerics/sequence_number_util.h"
namespace webrtc {
RtcEventProcessor::RtcEventProcessor() = default;
RtcEventProcessor::~RtcEventProcessor() = default;
void RtcEventProcessor::ProcessEventsInOrder() {
// `event_lists_` is a min-heap of lists ordered by the timestamp of the
// first element in the list. We therefore process the first element of the
// first list, then reinsert the remainder of that list into the heap
// if the list still contains unprocessed elements.
std::make_heap(event_lists_.begin(), event_lists_.end(), Cmp);
while (!event_lists_.empty()) {
event_lists_.front()->ProcessNext();
std::pop_heap(event_lists_.begin(), event_lists_.end(), Cmp);
if (event_lists_.back()->IsEmpty()) {
event_lists_.pop_back();
} else {
std::push_heap(event_lists_.begin(), event_lists_.end(), Cmp);
}
}
}
bool RtcEventProcessor::Cmp(const RtcEventProcessor::ListPtrType& a,
const RtcEventProcessor::ListPtrType& b) {
int64_t time_diff = a->GetNextTime() - b->GetNextTime();
if (time_diff != 0)
return time_diff > 0;
if (a->GetTypeOrder() != b->GetTypeOrder())
return a->GetTypeOrder() > b->GetTypeOrder();
std::optional<uint16_t> wrapped_seq_num_a = a->GetTransportSeqNum();
std::optional<uint16_t> wrapped_seq_num_b = b->GetTransportSeqNum();
if (wrapped_seq_num_a && wrapped_seq_num_b) {
return AheadOf<uint16_t>(*wrapped_seq_num_a, *wrapped_seq_num_b);
} else if (wrapped_seq_num_a.has_value() != wrapped_seq_num_b.has_value()) {
return wrapped_seq_num_a.has_value();
}
return a->GetInsertionOrder() > b->GetInsertionOrder();
}
} // namespace webrtc
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