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/*
* Copyright (c) 2015 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.
*/
#ifndef MODULES_RTP_RTCP_SOURCE_PACKET_LOSS_STATS_H_
#define MODULES_RTP_RTCP_SOURCE_PACKET_LOSS_STATS_H_
#include <stdint.h>
#include <set>
namespace webrtc {
// Keeps track of statistics of packet loss including whether losses are a
// single packet or multiple packets in a row.
class PacketLossStats {
public:
PacketLossStats();
~PacketLossStats();
// Adds a lost packet to the stats by sequence number.
void AddLostPacket(uint16_t sequence_number);
// Queries the number of packets that were lost by themselves, no neighboring
// packets were lost.
int GetSingleLossCount() const;
// Queries the number of times that multiple packets with sequential numbers
// were lost. This is the number of events with more than one packet lost,
// regardless of the size of the event;
int GetMultipleLossEventCount() const;
// Queries the number of packets lost in multiple packet loss events. Combined
// with the event count, this can be used to determine the average event size.
int GetMultipleLossPacketCount() const;
private:
std::set<uint16_t> lost_packets_buffer_;
std::set<uint16_t> lost_packets_wrapped_buffer_;
int single_loss_historic_count_;
int multiple_loss_historic_event_count_;
int multiple_loss_historic_packet_count_;
void ComputeLossCounts(int* out_single_loss_count,
int* out_multiple_loss_event_count,
int* out_multiple_loss_packet_count) const;
void PruneBuffer();
};
} // namespace webrtc
#endif // MODULES_RTP_RTCP_SOURCE_PACKET_LOSS_STATS_H_
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