mirror of
https://github.com/mollyim/webrtc.git
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fe6595f006
Users of the mixer can use this information to determine which sources were included in the frame. Bug: webrtc:12745 Change-Id: I11a8e3b1f4e8f95eb870336cad8dd082330bdf02 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/217768 Reviewed-by: Danil Chapovalov <danilchap@webrtc.org> Reviewed-by: Minyue Li <minyue@webrtc.org> Reviewed-by: Alessio Bazzica <alessiob@webrtc.org> Reviewed-by: Chen Xing <chxg@google.com> Commit-Queue: Doudou Kisabaka <doudouk@google.com> Cr-Commit-Position: refs/heads/master@{#34035}
469 lines
17 KiB
C++
469 lines
17 KiB
C++
/*
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* Copyright (c) 2019 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 "modules/rtp_rtcp/source/source_tracker.h"
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#include <algorithm>
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#include <list>
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#include <random>
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#include <set>
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#include <tuple>
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#include <utility>
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#include <vector>
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#include "absl/types/optional.h"
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#include "api/rtp_headers.h"
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#include "api/rtp_packet_info.h"
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#include "api/rtp_packet_infos.h"
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#include "test/gmock.h"
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#include "test/gtest.h"
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namespace webrtc {
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namespace {
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using ::testing::Combine;
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using ::testing::ElementsAre;
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using ::testing::ElementsAreArray;
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using ::testing::IsEmpty;
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using ::testing::TestWithParam;
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using ::testing::Values;
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constexpr size_t kPacketInfosCountMax = 5;
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// Simple "guaranteed to be correct" re-implementation of |SourceTracker| for
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// dual-implementation testing purposes.
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class ExpectedSourceTracker {
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public:
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explicit ExpectedSourceTracker(Clock* clock) : clock_(clock) {}
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void OnFrameDelivered(const RtpPacketInfos& packet_infos) {
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const int64_t now_ms = clock_->TimeInMilliseconds();
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for (const auto& packet_info : packet_infos) {
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RtpSource::Extensions extensions = {packet_info.audio_level(),
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packet_info.absolute_capture_time()};
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for (const auto& csrc : packet_info.csrcs()) {
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entries_.emplace_front(now_ms, csrc, RtpSourceType::CSRC,
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packet_info.rtp_timestamp(), extensions);
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}
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entries_.emplace_front(now_ms, packet_info.ssrc(), RtpSourceType::SSRC,
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packet_info.rtp_timestamp(), extensions);
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}
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PruneEntries(now_ms);
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}
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std::vector<RtpSource> GetSources() const {
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PruneEntries(clock_->TimeInMilliseconds());
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return std::vector<RtpSource>(entries_.begin(), entries_.end());
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}
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private:
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void PruneEntries(int64_t now_ms) const {
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const int64_t prune_ms = now_ms - 10000; // 10 seconds
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std::set<std::pair<RtpSourceType, uint32_t>> seen;
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auto it = entries_.begin();
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auto end = entries_.end();
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while (it != end) {
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auto next = it;
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++next;
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auto key = std::make_pair(it->source_type(), it->source_id());
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if (!seen.insert(key).second || it->timestamp_ms() < prune_ms) {
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entries_.erase(it);
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}
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it = next;
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}
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}
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Clock* const clock_;
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mutable std::list<RtpSource> entries_;
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};
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class SourceTrackerRandomTest
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: public TestWithParam<std::tuple<uint32_t, uint32_t>> {
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protected:
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SourceTrackerRandomTest()
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: ssrcs_count_(std::get<0>(GetParam())),
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csrcs_count_(std::get<1>(GetParam())),
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generator_(42) {}
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RtpPacketInfos GeneratePacketInfos() {
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size_t count = std::uniform_int_distribution<size_t>(
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1, kPacketInfosCountMax)(generator_);
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RtpPacketInfos::vector_type packet_infos;
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for (size_t i = 0; i < count; ++i) {
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packet_infos.emplace_back(GenerateSsrc(), GenerateCsrcs(),
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GenerateRtpTimestamp(), GenerateAudioLevel(),
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GenerateAbsoluteCaptureTime(),
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GenerateReceiveTime());
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}
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return RtpPacketInfos(std::move(packet_infos));
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}
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int64_t GenerateClockAdvanceTimeMilliseconds() {
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double roll = std::uniform_real_distribution<double>(0.0, 1.0)(generator_);
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if (roll < 0.05) {
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return 0;
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}
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if (roll < 0.08) {
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return SourceTracker::kTimeoutMs - 1;
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}
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if (roll < 0.11) {
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return SourceTracker::kTimeoutMs;
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}
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if (roll < 0.19) {
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return std::uniform_int_distribution<int64_t>(
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SourceTracker::kTimeoutMs,
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SourceTracker::kTimeoutMs * 1000)(generator_);
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}
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return std::uniform_int_distribution<int64_t>(
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1, SourceTracker::kTimeoutMs - 1)(generator_);
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}
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private:
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uint32_t GenerateSsrc() {
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return std::uniform_int_distribution<uint32_t>(1, ssrcs_count_)(generator_);
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}
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std::vector<uint32_t> GenerateCsrcs() {
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std::vector<uint32_t> csrcs;
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for (size_t i = 1; i <= csrcs_count_ && csrcs.size() < kRtpCsrcSize; ++i) {
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if (std::bernoulli_distribution(0.5)(generator_)) {
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csrcs.push_back(i);
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}
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}
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return csrcs;
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}
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uint32_t GenerateRtpTimestamp() {
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return std::uniform_int_distribution<uint32_t>()(generator_);
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}
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absl::optional<uint8_t> GenerateAudioLevel() {
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if (std::bernoulli_distribution(0.25)(generator_)) {
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return absl::nullopt;
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}
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// Workaround for std::uniform_int_distribution<uint8_t> not being allowed.
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return static_cast<uint8_t>(
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std::uniform_int_distribution<uint16_t>()(generator_));
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}
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absl::optional<AbsoluteCaptureTime> GenerateAbsoluteCaptureTime() {
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if (std::bernoulli_distribution(0.25)(generator_)) {
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return absl::nullopt;
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}
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AbsoluteCaptureTime value;
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value.absolute_capture_timestamp =
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std::uniform_int_distribution<uint64_t>()(generator_);
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if (std::bernoulli_distribution(0.5)(generator_)) {
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value.estimated_capture_clock_offset = absl::nullopt;
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} else {
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value.estimated_capture_clock_offset =
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std::uniform_int_distribution<int64_t>()(generator_);
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}
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return value;
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}
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Timestamp GenerateReceiveTime() {
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return Timestamp::Micros(
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std::uniform_int_distribution<int64_t>()(generator_));
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}
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const uint32_t ssrcs_count_;
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const uint32_t csrcs_count_;
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std::mt19937 generator_;
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};
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} // namespace
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TEST_P(SourceTrackerRandomTest, RandomOperations) {
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constexpr size_t kIterationsCount = 200;
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SimulatedClock clock(1000000000000ULL);
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SourceTracker actual_tracker(&clock);
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ExpectedSourceTracker expected_tracker(&clock);
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ASSERT_THAT(actual_tracker.GetSources(), IsEmpty());
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ASSERT_THAT(expected_tracker.GetSources(), IsEmpty());
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for (size_t i = 0; i < kIterationsCount; ++i) {
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RtpPacketInfos packet_infos = GeneratePacketInfos();
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actual_tracker.OnFrameDelivered(packet_infos);
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expected_tracker.OnFrameDelivered(packet_infos);
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clock.AdvanceTimeMilliseconds(GenerateClockAdvanceTimeMilliseconds());
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ASSERT_THAT(actual_tracker.GetSources(),
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ElementsAreArray(expected_tracker.GetSources()));
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}
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}
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INSTANTIATE_TEST_SUITE_P(All,
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SourceTrackerRandomTest,
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Combine(/*ssrcs_count_=*/Values(1, 2, 4),
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/*csrcs_count_=*/Values(0, 1, 3, 7)));
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TEST(SourceTrackerTest, StartEmpty) {
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SimulatedClock clock(1000000000000ULL);
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SourceTracker tracker(&clock);
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EXPECT_THAT(tracker.GetSources(), IsEmpty());
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}
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TEST(SourceTrackerTest, OnFrameDeliveredRecordsSourcesDistinctSsrcs) {
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constexpr uint32_t kSsrc1 = 10;
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constexpr uint32_t kSsrc2 = 11;
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constexpr uint32_t kCsrcs0 = 20;
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constexpr uint32_t kCsrcs1 = 21;
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constexpr uint32_t kCsrcs2 = 22;
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constexpr uint32_t kRtpTimestamp0 = 40;
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constexpr uint32_t kRtpTimestamp1 = 50;
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constexpr absl::optional<uint8_t> kAudioLevel0 = 50;
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constexpr absl::optional<uint8_t> kAudioLevel1 = 20;
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constexpr absl::optional<AbsoluteCaptureTime> kAbsoluteCaptureTime =
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AbsoluteCaptureTime{/*absolute_capture_timestamp=*/12,
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/*estimated_capture_clock_offset=*/absl::nullopt};
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constexpr Timestamp kReceiveTime0 = Timestamp::Millis(60);
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constexpr Timestamp kReceiveTime1 = Timestamp::Millis(70);
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SimulatedClock clock(1000000000000ULL);
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SourceTracker tracker(&clock);
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tracker.OnFrameDelivered(RtpPacketInfos(
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{RtpPacketInfo(kSsrc1, {kCsrcs0, kCsrcs1}, kRtpTimestamp0, kAudioLevel0,
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kAbsoluteCaptureTime, kReceiveTime0),
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RtpPacketInfo(kSsrc2, {kCsrcs2}, kRtpTimestamp1, kAudioLevel1,
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kAbsoluteCaptureTime, kReceiveTime1)}));
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int64_t timestamp_ms = clock.TimeInMilliseconds();
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constexpr RtpSource::Extensions extensions0 = {kAudioLevel0,
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kAbsoluteCaptureTime};
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constexpr RtpSource::Extensions extensions1 = {kAudioLevel1,
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kAbsoluteCaptureTime};
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EXPECT_THAT(tracker.GetSources(),
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ElementsAre(RtpSource(timestamp_ms, kSsrc2, RtpSourceType::SSRC,
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kRtpTimestamp1, extensions1),
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RtpSource(timestamp_ms, kCsrcs2, RtpSourceType::CSRC,
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kRtpTimestamp1, extensions1),
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RtpSource(timestamp_ms, kSsrc1, RtpSourceType::SSRC,
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kRtpTimestamp0, extensions0),
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RtpSource(timestamp_ms, kCsrcs1, RtpSourceType::CSRC,
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kRtpTimestamp0, extensions0),
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RtpSource(timestamp_ms, kCsrcs0, RtpSourceType::CSRC,
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kRtpTimestamp0, extensions0)));
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}
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TEST(SourceTrackerTest, OnFrameDeliveredRecordsSourcesSameSsrc) {
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constexpr uint32_t kSsrc = 10;
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constexpr uint32_t kCsrcs0 = 20;
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constexpr uint32_t kCsrcs1 = 21;
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constexpr uint32_t kCsrcs2 = 22;
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constexpr uint32_t kRtpTimestamp0 = 40;
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constexpr uint32_t kRtpTimestamp1 = 45;
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constexpr uint32_t kRtpTimestamp2 = 50;
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constexpr absl::optional<uint8_t> kAudioLevel0 = 50;
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constexpr absl::optional<uint8_t> kAudioLevel1 = 20;
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constexpr absl::optional<uint8_t> kAudioLevel2 = 10;
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constexpr absl::optional<AbsoluteCaptureTime> kAbsoluteCaptureTime =
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AbsoluteCaptureTime{/*absolute_capture_timestamp=*/12,
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/*estimated_capture_clock_offset=*/absl::nullopt};
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constexpr Timestamp kReceiveTime0 = Timestamp::Millis(60);
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constexpr Timestamp kReceiveTime1 = Timestamp::Millis(70);
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constexpr Timestamp kReceiveTime2 = Timestamp::Millis(80);
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SimulatedClock clock(1000000000000ULL);
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SourceTracker tracker(&clock);
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tracker.OnFrameDelivered(RtpPacketInfos(
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{RtpPacketInfo(kSsrc, {kCsrcs0, kCsrcs1}, kRtpTimestamp0, kAudioLevel0,
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kAbsoluteCaptureTime, kReceiveTime0),
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RtpPacketInfo(kSsrc, {kCsrcs2}, kRtpTimestamp1, kAudioLevel1,
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kAbsoluteCaptureTime, kReceiveTime1),
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RtpPacketInfo(kSsrc, {kCsrcs0}, kRtpTimestamp2, kAudioLevel2,
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kAbsoluteCaptureTime, kReceiveTime2)}));
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int64_t timestamp_ms = clock.TimeInMilliseconds();
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constexpr RtpSource::Extensions extensions0 = {kAudioLevel0,
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kAbsoluteCaptureTime};
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constexpr RtpSource::Extensions extensions1 = {kAudioLevel1,
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kAbsoluteCaptureTime};
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constexpr RtpSource::Extensions extensions2 = {kAudioLevel2,
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kAbsoluteCaptureTime};
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EXPECT_THAT(tracker.GetSources(),
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ElementsAre(RtpSource(timestamp_ms, kSsrc, RtpSourceType::SSRC,
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kRtpTimestamp2, extensions2),
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RtpSource(timestamp_ms, kCsrcs0, RtpSourceType::CSRC,
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kRtpTimestamp2, extensions2),
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RtpSource(timestamp_ms, kCsrcs2, RtpSourceType::CSRC,
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kRtpTimestamp1, extensions1),
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RtpSource(timestamp_ms, kCsrcs1, RtpSourceType::CSRC,
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kRtpTimestamp0, extensions0)));
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}
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TEST(SourceTrackerTest, OnFrameDeliveredUpdatesSources) {
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constexpr uint32_t kSsrc1 = 10;
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constexpr uint32_t kSsrc2 = 11;
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constexpr uint32_t kCsrcs0 = 20;
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constexpr uint32_t kCsrcs1 = 21;
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constexpr uint32_t kCsrcs2 = 22;
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constexpr uint32_t kRtpTimestamp0 = 40;
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constexpr uint32_t kRtpTimestamp1 = 41;
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constexpr uint32_t kRtpTimestamp2 = 42;
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constexpr absl::optional<uint8_t> kAudioLevel0 = 50;
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constexpr absl::optional<uint8_t> kAudioLevel1 = absl::nullopt;
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constexpr absl::optional<uint8_t> kAudioLevel2 = 10;
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constexpr absl::optional<AbsoluteCaptureTime> kAbsoluteCaptureTime0 =
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AbsoluteCaptureTime{12, 34};
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constexpr absl::optional<AbsoluteCaptureTime> kAbsoluteCaptureTime1 =
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AbsoluteCaptureTime{56, 78};
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constexpr absl::optional<AbsoluteCaptureTime> kAbsoluteCaptureTime2 =
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AbsoluteCaptureTime{89, 90};
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constexpr Timestamp kReceiveTime0 = Timestamp::Millis(60);
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constexpr Timestamp kReceiveTime1 = Timestamp::Millis(61);
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constexpr Timestamp kReceiveTime2 = Timestamp::Millis(62);
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constexpr RtpSource::Extensions extensions0 = {kAudioLevel0,
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kAbsoluteCaptureTime0};
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constexpr RtpSource::Extensions extensions1 = {kAudioLevel1,
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kAbsoluteCaptureTime1};
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constexpr RtpSource::Extensions extensions2 = {kAudioLevel2,
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kAbsoluteCaptureTime2};
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SimulatedClock clock(1000000000000ULL);
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SourceTracker tracker(&clock);
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tracker.OnFrameDelivered(RtpPacketInfos(
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{RtpPacketInfo(kSsrc1, {kCsrcs0, kCsrcs1}, kRtpTimestamp0, kAudioLevel0,
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kAbsoluteCaptureTime0, kReceiveTime0)}));
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int64_t timestamp_ms_0 = clock.TimeInMilliseconds();
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EXPECT_THAT(
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tracker.GetSources(),
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ElementsAre(RtpSource(timestamp_ms_0, kSsrc1, RtpSourceType::SSRC,
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kRtpTimestamp0, extensions0),
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RtpSource(timestamp_ms_0, kCsrcs1, RtpSourceType::CSRC,
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kRtpTimestamp0, extensions0),
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RtpSource(timestamp_ms_0, kCsrcs0, RtpSourceType::CSRC,
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kRtpTimestamp0, extensions0)));
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// Deliver packets with updated sources.
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clock.AdvanceTimeMilliseconds(17);
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tracker.OnFrameDelivered(RtpPacketInfos(
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{RtpPacketInfo(kSsrc1, {kCsrcs0, kCsrcs2}, kRtpTimestamp1, kAudioLevel1,
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kAbsoluteCaptureTime1, kReceiveTime1)}));
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int64_t timestamp_ms_1 = clock.TimeInMilliseconds();
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EXPECT_THAT(
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tracker.GetSources(),
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ElementsAre(RtpSource(timestamp_ms_1, kSsrc1, RtpSourceType::SSRC,
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kRtpTimestamp1, extensions1),
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RtpSource(timestamp_ms_1, kCsrcs2, RtpSourceType::CSRC,
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kRtpTimestamp1, extensions1),
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RtpSource(timestamp_ms_1, kCsrcs0, RtpSourceType::CSRC,
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kRtpTimestamp1, extensions1),
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RtpSource(timestamp_ms_0, kCsrcs1, RtpSourceType::CSRC,
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kRtpTimestamp0, extensions0)));
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// Deliver more packets with update csrcs and a new ssrc.
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clock.AdvanceTimeMilliseconds(17);
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tracker.OnFrameDelivered(RtpPacketInfos(
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{RtpPacketInfo(kSsrc2, {kCsrcs0}, kRtpTimestamp2, kAudioLevel2,
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kAbsoluteCaptureTime2, kReceiveTime2)}));
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int64_t timestamp_ms_2 = clock.TimeInMilliseconds();
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EXPECT_THAT(
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tracker.GetSources(),
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ElementsAre(RtpSource(timestamp_ms_2, kSsrc2, RtpSourceType::SSRC,
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kRtpTimestamp2, extensions2),
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RtpSource(timestamp_ms_2, kCsrcs0, RtpSourceType::CSRC,
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kRtpTimestamp2, extensions2),
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RtpSource(timestamp_ms_1, kSsrc1, RtpSourceType::SSRC,
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kRtpTimestamp1, extensions1),
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RtpSource(timestamp_ms_1, kCsrcs2, RtpSourceType::CSRC,
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kRtpTimestamp1, extensions1),
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RtpSource(timestamp_ms_0, kCsrcs1, RtpSourceType::CSRC,
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kRtpTimestamp0, extensions0)));
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}
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TEST(SourceTrackerTest, TimedOutSourcesAreRemoved) {
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constexpr uint32_t kSsrc = 10;
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constexpr uint32_t kCsrcs0 = 20;
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constexpr uint32_t kCsrcs1 = 21;
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constexpr uint32_t kCsrcs2 = 22;
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constexpr uint32_t kRtpTimestamp0 = 40;
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constexpr uint32_t kRtpTimestamp1 = 41;
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constexpr absl::optional<uint8_t> kAudioLevel0 = 50;
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constexpr absl::optional<uint8_t> kAudioLevel1 = absl::nullopt;
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constexpr absl::optional<AbsoluteCaptureTime> kAbsoluteCaptureTime0 =
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AbsoluteCaptureTime{12, 34};
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constexpr absl::optional<AbsoluteCaptureTime> kAbsoluteCaptureTime1 =
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AbsoluteCaptureTime{56, 78};
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constexpr Timestamp kReceiveTime0 = Timestamp::Millis(60);
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constexpr Timestamp kReceiveTime1 = Timestamp::Millis(61);
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SimulatedClock clock(1000000000000ULL);
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SourceTracker tracker(&clock);
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tracker.OnFrameDelivered(RtpPacketInfos(
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{RtpPacketInfo(kSsrc, {kCsrcs0, kCsrcs1}, kRtpTimestamp0, kAudioLevel0,
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kAbsoluteCaptureTime0, kReceiveTime0)}));
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clock.AdvanceTimeMilliseconds(17);
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tracker.OnFrameDelivered(RtpPacketInfos(
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{RtpPacketInfo(kSsrc, {kCsrcs0, kCsrcs2}, kRtpTimestamp1, kAudioLevel1,
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kAbsoluteCaptureTime1, kReceiveTime1)}));
|
|
|
|
int64_t timestamp_ms_1 = clock.TimeInMilliseconds();
|
|
|
|
clock.AdvanceTimeMilliseconds(SourceTracker::kTimeoutMs);
|
|
|
|
constexpr RtpSource::Extensions extensions1 = {kAudioLevel1,
|
|
kAbsoluteCaptureTime1};
|
|
|
|
EXPECT_THAT(
|
|
tracker.GetSources(),
|
|
ElementsAre(RtpSource(timestamp_ms_1, kSsrc, RtpSourceType::SSRC,
|
|
kRtpTimestamp1, extensions1),
|
|
RtpSource(timestamp_ms_1, kCsrcs2, RtpSourceType::CSRC,
|
|
kRtpTimestamp1, extensions1),
|
|
RtpSource(timestamp_ms_1, kCsrcs0, RtpSourceType::CSRC,
|
|
kRtpTimestamp1, extensions1)));
|
|
}
|
|
|
|
} // namespace webrtc
|