856ca198e2
Bug: None Change-Id: I5511593b1459b1501c08ac41aa9220ed54ed73ed Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/142164 Reviewed-by: Erik Språng <sprang@webrtc.org> Commit-Queue: Niels Moller <nisse@webrtc.org> Cr-Commit-Position: refs/heads/master@{#28286}
85 lines
2.8 KiB
C++
85 lines
2.8 KiB
C++
/*
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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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#include "video/report_block_stats.h"
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#include <algorithm>
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namespace webrtc {
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namespace {
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int FractionLost(uint32_t num_lost_sequence_numbers,
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uint32_t num_sequence_numbers) {
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if (num_sequence_numbers == 0) {
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return 0;
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}
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return ((num_lost_sequence_numbers * 255) + (num_sequence_numbers / 2)) /
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num_sequence_numbers;
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}
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} // namespace
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// Helper class for rtcp statistics.
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ReportBlockStats::ReportBlockStats()
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: num_sequence_numbers_(0), num_lost_sequence_numbers_(0) {}
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ReportBlockStats::~ReportBlockStats() {}
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void ReportBlockStats::Store(const RtcpStatistics& rtcp_stats,
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uint32_t remote_ssrc,
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uint32_t source_ssrc) {
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RTCPReportBlock block;
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block.packets_lost = rtcp_stats.packets_lost;
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block.fraction_lost = rtcp_stats.fraction_lost;
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block.extended_highest_sequence_number =
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rtcp_stats.extended_highest_sequence_number;
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block.jitter = rtcp_stats.jitter;
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block.sender_ssrc = remote_ssrc;
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block.source_ssrc = source_ssrc;
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uint32_t num_sequence_numbers = 0;
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uint32_t num_lost_sequence_numbers = 0;
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StoreAndAddPacketIncrement(block, &num_sequence_numbers,
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&num_lost_sequence_numbers);
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}
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void ReportBlockStats::StoreAndAddPacketIncrement(
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const RTCPReportBlock& report_block,
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uint32_t* num_sequence_numbers,
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uint32_t* num_lost_sequence_numbers) {
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// Get diff with previous report block.
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ReportBlockMap::iterator prev_report_block =
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prev_report_blocks_.find(report_block.source_ssrc);
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if (prev_report_block != prev_report_blocks_.end()) {
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int seq_num_diff =
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report_block.extended_highest_sequence_number -
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prev_report_block->second.extended_highest_sequence_number;
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int cum_loss_diff =
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report_block.packets_lost - prev_report_block->second.packets_lost;
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if (seq_num_diff >= 0 && cum_loss_diff >= 0) {
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*num_sequence_numbers += seq_num_diff;
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*num_lost_sequence_numbers += cum_loss_diff;
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// Update total number of packets/lost packets.
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num_sequence_numbers_ += seq_num_diff;
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num_lost_sequence_numbers_ += cum_loss_diff;
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}
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}
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// Store current report block.
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prev_report_blocks_[report_block.source_ssrc] = report_block;
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}
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int ReportBlockStats::FractionLostInPercent() const {
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if (num_sequence_numbers_ == 0) {
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return -1;
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}
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return FractionLost(num_lost_sequence_numbers_, num_sequence_numbers_) * 100 /
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255;
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}
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} // namespace webrtc
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