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/*
* Copyright (c) 2014 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 VIDEO_REPORT_BLOCK_STATS_H_
#define VIDEO_REPORT_BLOCK_STATS_H_
#include <stdint.h>
#include <map>
namespace webrtc {
// TODO(nisse): Usefulness of this class is somewhat unclear. The inputs are
// cumulative counters, from which we compute deltas, and then accumulate the
// deltas. May be needed on the send side, to handle wraparound in the short
// counters received over RTCP, but should not be needed on the receive side
// where we can use large enough types for all counters we need.
// Helper class for rtcp statistics.
class ReportBlockStats {
public:
ReportBlockStats();
~ReportBlockStats();
// Updates stats and stores report block.
void Store(uint32_t ssrc,
int packets_lost,
uint32_t extended_highest_sequence_number);
// Returns the total fraction of lost packets (or -1 if less than two report
// blocks have been stored).
int FractionLostInPercent() const;
private:
// The information from an RTCP report block that we need.
struct Report {
uint32_t extended_highest_sequence_number;
int32_t packets_lost;
};
// The total number of packets/lost packets.
uint32_t num_sequence_numbers_;
uint32_t num_lost_sequence_numbers_;
// Map holding the last stored report (mapped by the source SSRC).
std::map<uint32_t, Report> prev_reports_;
};
} // namespace webrtc
#endif // VIDEO_REPORT_BLOCK_STATS_H_
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