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