From d8bbc7858622b6d9c278469aab701ca0b609cddf Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 15 May 2024 05:35:49 +0200
Subject: Merging upstream version 126.0.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 .../rtp_rtcp/source/receive_statistics_impl.cc     |   8 +-
 .../rtp_rtcp/source/receive_statistics_unittest.cc |  17 ++
 .../modules/rtp_rtcp/source/rtcp_receiver.cc       |   4 +-
 .../source/rtp_dependency_descriptor_extension.cc  |  13 ++
 .../source/rtp_dependency_descriptor_extension.h   |  10 ++
 .../modules/rtp_rtcp/source/rtp_format_h264.cc     |  27 +--
 .../rtp_rtcp/source/rtp_format_h264_unittest.cc    | 186 +++++++++++++++++++++
 .../modules/rtp_rtcp/source/rtp_format_vp8.cc      |   4 +-
 .../rtp_rtcp/source/rtp_format_vp8_unittest.cc     |  12 ++
 .../modules/rtp_rtcp/source/rtp_format_vp9.cc      |   5 +-
 .../rtp_rtcp/source/rtp_format_vp9_unittest.cc     |   5 +
 .../libwebrtc/modules/rtp_rtcp/source/rtp_packet.h |   8 +-
 .../modules/rtp_rtcp/source/rtp_packet_to_send.cc  |  11 ++
 .../modules/rtp_rtcp/source/rtp_packet_to_send.h   |  10 +-
 .../modules/rtp_rtcp/source/rtp_packet_unittest.cc |  35 ++++
 .../rtp_rtcp/source/rtp_packetizer_av1_unittest.cc |   6 +
 16 files changed, 337 insertions(+), 24 deletions(-)

(limited to 'third_party/libwebrtc/modules/rtp_rtcp/source')

diff --git a/third_party/libwebrtc/modules/rtp_rtcp/source/receive_statistics_impl.cc b/third_party/libwebrtc/modules/rtp_rtcp/source/receive_statistics_impl.cc
index 0e5e40f502..1dc56bb96f 100644
--- a/third_party/libwebrtc/modules/rtp_rtcp/source/receive_statistics_impl.cc
+++ b/third_party/libwebrtc/modules/rtp_rtcp/source/receive_statistics_impl.cc
@@ -18,6 +18,7 @@
 
 #include "api/units/time_delta.h"
 #include "modules/remote_bitrate_estimator/test/bwe_test_logging.h"
+#include "modules/rtp_rtcp/include/rtp_rtcp_defines.h"
 #include "modules/rtp_rtcp/source/rtcp_packet/report_block.h"
 #include "modules/rtp_rtcp/source/rtp_packet_received.h"
 #include "modules/rtp_rtcp/source/rtp_rtcp_config.h"
@@ -159,16 +160,15 @@ void StreamStatisticianImpl::UpdateJitter(const RtpPacketReceived& packet,
   int32_t time_diff_samples =
       receive_diff_rtp - (packet.Timestamp() - last_received_timestamp_);
 
-  time_diff_samples = std::abs(time_diff_samples);
-
   ReviseFrequencyAndJitter(packet.payload_type_frequency());
 
   // lib_jingle sometimes deliver crazy jumps in TS for the same stream.
   // If this happens, don't update jitter value. Use 5 secs video frequency
   // as the threshold.
-  if (time_diff_samples < 450000) {
+  if (time_diff_samples < 5 * kVideoPayloadTypeFrequency &&
+      time_diff_samples > -5 * kVideoPayloadTypeFrequency) {
     // Note we calculate in Q4 to avoid using float.
-    int32_t jitter_diff_q4 = (time_diff_samples << 4) - jitter_q4_;
+    int32_t jitter_diff_q4 = (std::abs(time_diff_samples) << 4) - jitter_q4_;
     jitter_q4_ += ((jitter_diff_q4 + 8) >> 4);
   }
 }
diff --git a/third_party/libwebrtc/modules/rtp_rtcp/source/receive_statistics_unittest.cc b/third_party/libwebrtc/modules/rtp_rtcp/source/receive_statistics_unittest.cc
index a2558545f0..8b31912f0f 100644
--- a/third_party/libwebrtc/modules/rtp_rtcp/source/receive_statistics_unittest.cc
+++ b/third_party/libwebrtc/modules/rtp_rtcp/source/receive_statistics_unittest.cc
@@ -898,5 +898,22 @@ TEST(ReviseJitterTest,
   EXPECT_EQ(GetJitter(*statistics), 172U);
 }
 
+TEST(ReviseJitterTest, TwoPacketsWithMaximumRtpTimestampDifference) {
+  SimulatedClock clock(0);
+  std::unique_ptr<ReceiveStatistics> statistics =
+      ReceiveStatistics::Create(&clock);
+  RtpPacketReceived packet1 = MakeRtpPacket(/*payload_type_frequency=*/90'000,
+                                            /*timestamp=*/0x01234567);
+  RtpPacketReceived packet2 =
+      MakeNextRtpPacket(packet1,
+                        /*payload_type_frequency=*/90'000,
+                        /*timestamp=*/0x81234567);
+  statistics->OnRtpPacket(packet1);
+  statistics->OnRtpPacket(packet2);
+
+  // Expect large jump in RTP timestamp is ignored for jitter calculation.
+  EXPECT_EQ(GetJitter(*statistics), 0U);
+}
+
 }  // namespace
 }  // namespace webrtc
diff --git a/third_party/libwebrtc/modules/rtp_rtcp/source/rtcp_receiver.cc b/third_party/libwebrtc/modules/rtp_rtcp/source/rtcp_receiver.cc
index bda6ad9a52..756136866d 100644
--- a/third_party/libwebrtc/modules/rtp_rtcp/source/rtcp_receiver.cc
+++ b/third_party/libwebrtc/modules/rtp_rtcp/source/rtcp_receiver.cc
@@ -1190,11 +1190,11 @@ std::vector<rtcp::TmmbItem> RTCPReceiver::TmmbrReceived() {
   MutexLock lock(&rtcp_receiver_lock_);
   std::vector<rtcp::TmmbItem> candidates;
 
-  Timestamp timeout = clock_->CurrentTime() - kTmmbrTimeoutInterval;
+  Timestamp now = clock_->CurrentTime();
 
   for (auto& kv : tmmbr_infos_) {
     for (auto it = kv.second.tmmbr.begin(); it != kv.second.tmmbr.end();) {
-      if (it->second.last_updated < timeout) {
+      if (now - it->second.last_updated > kTmmbrTimeoutInterval) {
         // Erase timeout entries.
         it = kv.second.tmmbr.erase(it);
       } else {
diff --git a/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_dependency_descriptor_extension.cc b/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_dependency_descriptor_extension.cc
index fd42b798d4..27b0420926 100644
--- a/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_dependency_descriptor_extension.cc
+++ b/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_dependency_descriptor_extension.cc
@@ -52,4 +52,17 @@ bool RtpDependencyDescriptorExtension::Write(
   return writer.Write();
 }
 
+bool RtpDependencyDescriptorExtensionMandatory::Parse(
+    rtc::ArrayView<const uint8_t> data,
+    DependencyDescriptorMandatory* descriptor) {
+  if (data.size() < 3) {
+    return false;
+  }
+  descriptor->set_first_packet_in_frame(data[0] & 0b1000'0000);
+  descriptor->set_last_packet_in_frame(data[0] & 0b0100'0000);
+  descriptor->set_template_id(data[0] & 0b0011'1111);
+  descriptor->set_frame_number((uint16_t{data[1]} << 8) | data[2]);
+  return true;
+}
+
 }  // namespace webrtc
diff --git a/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_dependency_descriptor_extension.h b/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_dependency_descriptor_extension.h
index 8d6e4b8d37..a3e415917c 100644
--- a/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_dependency_descriptor_extension.h
+++ b/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_dependency_descriptor_extension.h
@@ -54,6 +54,16 @@ class RtpDependencyDescriptorExtension {
   static constexpr std::bitset<32> kAllChainsAreActive = ~uint32_t{0};
 };
 
+// Trait to only read the mandatory part of the descriptor.
+class RtpDependencyDescriptorExtensionMandatory {
+ public:
+  static constexpr webrtc::RTPExtensionType kId =
+      webrtc::RtpDependencyDescriptorExtension::kId;
+
+  static bool Parse(rtc::ArrayView<const uint8_t> data,
+                    DependencyDescriptorMandatory* descriptor);
+};
+
 }  // namespace webrtc
 
 #endif  // MODULES_RTP_RTCP_SOURCE_RTP_DEPENDENCY_DESCRIPTOR_EXTENSION_H_
diff --git a/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_format_h264.cc b/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_format_h264.cc
index d066bafb90..9c1dc4edb8 100644
--- a/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_format_h264.cc
+++ b/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_format_h264.cc
@@ -19,6 +19,7 @@
 #include <utility>
 #include <vector>
 
+#include "absl/algorithm/container.h"
 #include "absl/types/optional.h"
 #include "absl/types/variant.h"
 #include "common_video/h264/h264_common.h"
@@ -52,11 +53,14 @@ RtpPacketizerH264::RtpPacketizerH264(rtc::ArrayView<const uint8_t> payload,
     input_fragments_.push_back(
         payload.subview(nalu.payload_start_offset, nalu.payload_size));
   }
-
-  if (!GeneratePackets(packetization_mode)) {
-    // If failed to generate all the packets, discard already generated
-    // packets in case the caller would ignore return value and still try to
-    // call NextPacket().
+  bool has_empty_fragments = absl::c_any_of(
+      input_fragments_, [](const rtc::ArrayView<const uint8_t> fragment) {
+        return fragment.empty();
+      });
+  if (has_empty_fragments || !GeneratePackets(packetization_mode)) {
+    // If empty fragments were found or we failed to generate all the packets,
+    // discard already generated packets in case the caller would ignore the
+    // return value and still try to call NextPacket().
     num_packets_left_ = 0;
     while (!packets_.empty()) {
       packets_.pop();
@@ -73,6 +77,7 @@ size_t RtpPacketizerH264::NumPackets() const {
 bool RtpPacketizerH264::GeneratePackets(
     H264PacketizationMode packetization_mode) {
   for (size_t i = 0; i < input_fragments_.size();) {
+    RTC_DCHECK(!input_fragments_[i].empty());
     switch (packetization_mode) {
       case H264PacketizationMode::SingleNalUnit:
         if (!PacketizeSingleNalu(i))
@@ -173,11 +178,11 @@ size_t RtpPacketizerH264::PacketizeStapA(size_t fragment_index) {
       return fragment_size;
     }
   };
-
   while (payload_size_left >= payload_size_needed()) {
     RTC_CHECK_GT(fragment.size(), 0);
-    packets_.push(PacketUnit(fragment, aggregated_fragments == 0, false, true,
-                             fragment[0]));
+
+    packets_.push(PacketUnit(fragment, /*first=*/aggregated_fragments == 0,
+                             /*last=*/false, /*aggregated=*/true, fragment[0]));
     payload_size_left -= fragment.size();
     payload_size_left -= fragment_headers_length;
 
@@ -218,9 +223,9 @@ bool RtpPacketizerH264::PacketizeSingleNalu(size_t fragment_index) {
                       << limits_.max_payload_len;
     return false;
   }
-  RTC_CHECK_GT(fragment.size(), 0u);
-  packets_.push(PacketUnit(fragment, true /* first */, true /* last */,
-                           false /* aggregated */, fragment[0]));
+  RTC_CHECK(!fragment.empty());
+  packets_.push(PacketUnit(fragment, /*first=*/true, /*last=*/true,
+                           /*aggregated=*/false, fragment[0]));
   ++num_packets_left_;
   return true;
 }
diff --git a/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_format_h264_unittest.cc b/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_format_h264_unittest.cc
index 18311c6e8c..3920c4acd5 100644
--- a/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_format_h264_unittest.cc
+++ b/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_format_h264_unittest.cc
@@ -116,6 +116,7 @@ std::vector<RtpPacketToSend> FetchAllPackets(RtpPacketizerH264* packetizer) {
   RtpPacketToSend packet(kNoExtensions);
   while (packetizer->NextPacket(&packet)) {
     result.push_back(packet);
+    packet.Clear();
   }
   EXPECT_THAT(result, SizeIs(num_packets));
   return result;
@@ -527,5 +528,190 @@ TEST(RtpPacketizerH264Test, RejectsOverlongDataInPacketizationMode0) {
 
   EXPECT_THAT(packets, IsEmpty());
 }
+
+TEST(RtpPacketizerH264Test, DoesNotPacketizeWithEmptyNalUnit) {
+  RtpPacketizer::PayloadSizeLimits limits;
+  limits.max_payload_len = kMaxPayloadSize;
+
+  uint8_t empty_nal_input[] = {0x00, 0x00, 0x01, /* empty NAL unit data */
+                               0x00, 0x00, 0x01, 0x01};
+  RtpPacketizerH264 packetizer(empty_nal_input, limits,
+                               H264PacketizationMode::NonInterleaved);
+  EXPECT_EQ(packetizer.NumPackets(), 0u);
+}
+
+TEST(RtpPacketizerH264Test, MultipleStapA) {
+  RtpPacketizer::PayloadSizeLimits limits;
+  limits.max_payload_len = kMaxPayloadSize;
+  limits.first_packet_reduction_len = 0;
+  limits.last_packet_reduction_len = 0;
+  limits.single_packet_reduction_len = 0;
+  // A lot of small NAL units that will result in two STAP-A being generated.
+  // Input data must exceed the size of a single RTP packet.
+  uint8_t long_input[] = {
+      0x19, 0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01,
+      0x8e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x04,
+      0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01, 0x8e, 0x00, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x01,
+      0x00, 0x00, 0x01, 0x8e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x04, 0x00,
+      0x00, 0x01, 0x00, 0xaf, 0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x01,
+      0x00, 0x00, 0x01, 0x8e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x04, 0x00,
+      0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01, 0x8e, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x00, 0xaf, 0x01,
+      0x04, 0x00, 0x19, 0x00, 0x00, 0x01, 0xf9, 0x01, 0x00, 0x00, 0x00, 0x01,
+      0x8e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0xf7, 0x01,
+      0x04, 0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01, 0x8e, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x00, 0x0b, 0x01, 0x04, 0x00,
+      0x19, 0x00, 0x01, 0x00, 0x00, 0x01, 0x8e, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x01, 0x04, 0x00, 0x00, 0x01, 0x00, 0xaf, 0x01, 0x04, 0x00, 0x19, 0x00,
+      0x00, 0x01, 0x01, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x01, 0x00, 0xaf, 0x01, 0x04, 0x00, 0x19, 0x00, 0x00,
+      0x01, 0x01, 0x02, 0x00, 0x00, 0x00, 0x01, 0x8e, 0x00, 0x00, 0x00, 0x00,
+      0x19, 0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01,
+      0x8e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x04,
+      0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x8e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x19,
+      0x7a, 0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01,
+      0x8e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x04,
+      0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01, 0x8e, 0x00, 0x00, 0x00, 0x00,
+      0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x00, 0x04, 0x00, 0x00, 0x01, 0x00,
+      0xaf, 0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01,
+      0x8e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x04,
+      0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01, 0x8e, 0x00, 0x00, 0x00, 0x00,
+      0x01, 0x00, 0xaf, 0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x01, 0x00,
+      0x00, 0x01, 0x8e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x04, 0x00, 0x00,
+      0x01, 0x04, 0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01, 0x8e, 0x00, 0x00,
+      0x00, 0x00, 0x11, 0xd4, 0x00, 0x19, 0x00, 0x00, 0x01, 0x04, 0x00, 0x00,
+      0x01, 0x01, 0x00, 0x00, 0x01, 0x8e, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01,
+      0x04, 0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01, 0x8e, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x00, 0xaf, 0x00, 0x00, 0x01,
+      0x04, 0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01, 0x8e, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x01,
+      0x00, 0x00, 0x01, 0x8e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x04, 0x00,
+      0x00, 0x01, 0x00, 0xaf, 0x01, 0x04, 0x00, 0x19, 0x00, 0x01, 0x00, 0xaf,
+      0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01, 0x8e,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x04, 0x00,
+      0x00, 0x01, 0x01, 0x00, 0x00, 0x01, 0x8e, 0x00, 0x00, 0x10, 0x00, 0x00,
+      0x01, 0x04, 0x00, 0x00, 0x01, 0x00, 0xaf, 0x01, 0x04, 0x00, 0x19, 0x00,
+      0x00, 0x01, 0xf9, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01, 0x00,
+      0x00, 0x01, 0x8e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff,
+      0x08, 0xfe, 0xfb, 0xff, 0xff, 0xf4, 0x01, 0x00, 0x00, 0x01, 0x8e, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x00, 0x04, 0x00,
+      0x00, 0x01, 0x00, 0xaf, 0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x01,
+      0x00, 0x00, 0x01, 0x8e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x04, 0x00,
+      0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01, 0x8e, 0x00,
+      0x00, 0x00, 0x00, 0x01, 0x00, 0xaf, 0x00, 0x00, 0x01, 0x04, 0x00, 0x00,
+      0x01, 0x01, 0x00, 0x00, 0x01, 0x8e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
+      0x01, 0x8e, 0x00, 0x00, 0x00, 0x00, 0x11, 0xd4, 0x00, 0x19, 0x00, 0x00,
+      0x01, 0x04, 0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01, 0x8e, 0x00, 0x01,
+      0x04, 0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01,
+      0x8e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x00,
+      0xaf, 0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x04,
+      0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01, 0x8e,
+      0x00, 0x00, 0x00, 0x00, 0x11, 0xd4, 0x00, 0x19, 0x00, 0x00, 0x01, 0x04,
+      0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01, 0x8e, 0x00, 0x01, 0x04, 0x00,
+      0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01, 0x8e, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x00, 0xaf, 0x00,
+      0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01, 0x8e, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x04, 0x00, 0x00,
+      0x01, 0x01, 0x00, 0x00, 0x01, 0x8e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
+      0x04, 0x00, 0x00, 0x01, 0x00, 0xaf, 0x01, 0x04, 0x00, 0x19, 0x00, 0x00,
+      0x01, 0xf9, 0x01, 0x00, 0x00, 0x00, 0x01, 0x8e, 0x00, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x01, 0x00, 0xf7, 0x01, 0x04, 0x00, 0x00, 0x01, 0x01,
+      0x00, 0x00, 0x01, 0x8e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x04, 0x00,
+      0x00, 0x01, 0x00, 0xaf, 0x01, 0x04, 0x00, 0x19, 0x00, 0x00, 0x01, 0x01,
+      0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x01, 0x00, 0xaf, 0x01, 0x04, 0x00, 0x19, 0x00, 0x00, 0x01, 0x01, 0x02,
+      0x00, 0x00, 0x00, 0x01, 0x8e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x01, 0x00, 0xf7, 0x01, 0x04, 0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01,
+      0x00, 0xf7, 0x01, 0x04, 0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01, 0x8e,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x04, 0x26, 0x00, 0x00, 0x01, 0x00,
+      0xaf, 0x01, 0x04, 0x00, 0x19, 0x00, 0x00, 0x00, 0x01, 0x04, 0x00, 0x00,
+      0x01, 0x00, 0xaf, 0x01, 0x04, 0x00, 0x19, 0x00, 0x00, 0x01, 0x00, 0x01,
+      0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x00,
+      0xaf, 0x01, 0x04, 0x00, 0x19, 0x00, 0x00, 0x01, 0xf9, 0x01, 0x00, 0x00,
+      0x00, 0x01, 0x8e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00,
+      0xf7, 0x01, 0x04, 0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01, 0x8e, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x00, 0x0b, 0x2c,
+      0x01, 0x04, 0x00, 0x19, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x01, 0x04, 0x00, 0x00, 0x01, 0x00, 0xaf, 0x01, 0x04, 0x00, 0x19, 0x00,
+      0x00, 0x01, 0x01, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x01, 0x00, 0xaf, 0x01, 0x04, 0x00, 0x19, 0x00, 0x00,
+      0x01, 0x01, 0x02, 0x00, 0x00, 0x00, 0x01, 0x8e, 0x00, 0x00, 0x00, 0x00,
+      0x19, 0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01,
+      0x8e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x04,
+      0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01, 0x8e, 0x00, 0x00, 0x00, 0x00,
+      0x00, 0x01, 0x00, 0x00, 0x19, 0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01,
+      0x01, 0x00, 0x00, 0x01, 0x8e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x04,
+      0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01, 0x8e,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x00, 0xaf,
+      0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01, 0x8e,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x04, 0x00,
+      0x00, 0x01, 0x01, 0x00, 0x00, 0x01, 0x8e, 0x00, 0x00, 0x10, 0x00, 0x00,
+      0x01, 0x04, 0x00, 0x00, 0x01, 0x00, 0xaf, 0x01, 0x04, 0x00, 0x19, 0x00,
+      0x00, 0x01, 0xf9, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01, 0x00,
+      0x00, 0x01, 0x8e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff,
+      0x08, 0xfe, 0xfb, 0xff, 0xff, 0xf4, 0x01, 0x00, 0x00, 0x01, 0x8e, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x00, 0x04, 0x00,
+      0x00, 0x01, 0x00, 0xaf, 0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x01,
+      0x00, 0x00, 0x01, 0x8e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x04, 0x00,
+      0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01, 0x8e, 0x00,
+      0x00, 0x00, 0x00, 0x01, 0x00, 0xaf, 0x00, 0x00, 0x01, 0x04, 0x00, 0x00,
+      0x01, 0x01, 0x00, 0x00, 0x01, 0x8e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
+      0x04, 0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01,
+      0x8e, 0x00, 0x04, 0x00, 0x00, 0x01, 0x00, 0x04, 0x00, 0x00, 0x01, 0x00,
+      0xaf, 0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x00, 0x00, 0x11, 0xd4, 0x00,
+      0x19, 0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01,
+      0x8e, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x01,
+      0x00, 0x00, 0x01, 0x8e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x04, 0x00,
+      0x00, 0x01, 0x00, 0xaf, 0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x01,
+      0x00, 0x00, 0x01, 0x8e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x04, 0x00,
+      0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01, 0x8e, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x00, 0xaf, 0x01,
+      0x04, 0x00, 0x19, 0x00, 0x00, 0x01, 0xf9, 0x01, 0x00, 0x00, 0x00, 0x01,
+      0x8e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0xf7, 0x01,
+      0x04, 0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01, 0x8e, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x00, 0xaf, 0x01, 0x04, 0x00,
+      0x19, 0x00, 0x00, 0x01, 0x01, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0xaf, 0x01, 0x04, 0x00, 0x19,
+      0x00, 0x00, 0x01, 0x01, 0x02, 0x00, 0x00, 0x00, 0x01, 0x8e, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0xf7, 0x01, 0x04, 0x00, 0x00,
+      0x01, 0x01, 0x00, 0x00, 0x01, 0x00, 0xf7, 0x01, 0x04, 0x00, 0x00, 0x01,
+      0x01, 0x00, 0x00, 0x01, 0x8e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x04,
+      0x26, 0x00, 0x00, 0x01, 0x00, 0xaf, 0x01, 0x04, 0x00, 0x19, 0x00, 0x00,
+      0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x00, 0xaf, 0x01, 0x04, 0x00, 0x19,
+      0x00, 0x00, 0x01, 0x00, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
+      0x04, 0x00, 0x00, 0xaf, 0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x01,
+      0x00, 0x00, 0x01, 0x8e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x04, 0x00,
+      0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01, 0x8e, 0x00,
+      0x00, 0x00, 0x00, 0x11, 0xd4, 0x00, 0x19, 0x00, 0x00, 0x01, 0x04, 0x00,
+      0x00, 0x01, 0x01, 0x00, 0x00, 0x01, 0x8e, 0x00, 0x01, 0x04, 0x00, 0x00,
+      0x01, 0x04, 0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01, 0x8e, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x00, 0xaf, 0x00, 0x00,
+      0x01, 0x04, 0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01, 0x8e, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01,
+      0x01, 0x00, 0x00, 0x01, 0x8e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01,
+      0x00, 0xaf, 0x01, 0x04, 0x00, 0x19, 0x00, 0x00, 0x01, 0xf9, 0x01, 0x00,
+      0x00, 0x00, 0x01, 0x8e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
+      0x00, 0xf7, 0x01, 0x04, 0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01, 0x8e,
+      0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01, 0x8e,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x04, 0x00, 0x00, 0x01, 0x04, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x01};
+  RtpPacketizerH264 packetizer(long_input, limits,
+                               H264PacketizationMode::NonInterleaved);
+  EXPECT_EQ(packetizer.NumPackets(), 2u);
+  EXPECT_THAT(FetchAllPackets(&packetizer), SizeIs(2));
+}
+
 }  // namespace
 }  // namespace webrtc
diff --git a/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_format_vp8.cc b/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_format_vp8.cc
index ae5f4e50a4..34b3fd9d2f 100644
--- a/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_format_vp8.cc
+++ b/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_format_vp8.cc
@@ -63,7 +63,9 @@ RtpPacketizerVp8::RtpPacketizerVp8(rtc::ArrayView<const uint8_t> payload,
                                    const RTPVideoHeaderVP8& hdr_info)
     : hdr_(BuildHeader(hdr_info)), remaining_payload_(payload) {
   limits.max_payload_len -= hdr_.size();
-  payload_sizes_ = SplitAboutEqually(payload.size(), limits);
+  if (!payload.empty()) {
+    payload_sizes_ = SplitAboutEqually(payload.size(), limits);
+  }
   current_packet_ = payload_sizes_.begin();
 }
 
diff --git a/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_format_vp8_unittest.cc b/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_format_vp8_unittest.cc
index 7934ff8ea9..cab7fc4422 100644
--- a/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_format_vp8_unittest.cc
+++ b/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_format_vp8_unittest.cc
@@ -21,6 +21,18 @@ namespace {
 
 constexpr RtpPacketizer::PayloadSizeLimits kNoSizeLimits;
 
+TEST(RtpPacketizerVp8Test, EmptyPayload) {
+  RTPVideoHeaderVP8 hdr_info;
+  hdr_info.InitRTPVideoHeaderVP8();
+  hdr_info.pictureId = 200;
+  RtpFormatVp8TestHelper helper(&hdr_info, /*payload_len=*/30);
+
+  RtpPacketizer::PayloadSizeLimits limits;
+  limits.max_payload_len = 12;  // Small enough to produce 4 packets.
+  RtpPacketizerVp8 packetizer({}, limits, hdr_info);
+  EXPECT_EQ(packetizer.NumPackets(), 0u);
+}
+
 TEST(RtpPacketizerVp8Test, ResultPacketsAreAlmostEqualSize) {
   RTPVideoHeaderVP8 hdr_info;
   hdr_info.InitRTPVideoHeaderVP8();
diff --git a/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_format_vp9.cc b/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_format_vp9.cc
index 9ad4aa97c3..5e037859ce 100644
--- a/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_format_vp9.cc
+++ b/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_format_vp9.cc
@@ -321,8 +321,9 @@ RtpPacketizerVp9::RtpPacketizerVp9(rtc::ArrayView<const uint8_t> payload,
   limits.max_payload_len -= header_size_;
   limits.first_packet_reduction_len += first_packet_extra_header_size_;
   limits.single_packet_reduction_len += first_packet_extra_header_size_;
-
-  payload_sizes_ = SplitAboutEqually(payload.size(), limits);
+  if (!payload.empty()) {
+    payload_sizes_ = SplitAboutEqually(payload.size(), limits);
+  }
   current_packet_ = payload_sizes_.begin();
 }
 
diff --git a/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_format_vp9_unittest.cc b/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_format_vp9_unittest.cc
index e18b8a803f..948bcf3bdb 100644
--- a/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_format_vp9_unittest.cc
+++ b/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_format_vp9_unittest.cc
@@ -186,6 +186,11 @@ class RtpPacketizerVp9Test : public ::testing::Test {
   }
 };
 
+TEST_F(RtpPacketizerVp9Test, EmptyPayload) {
+  RTPVideoHeader video_header;
+  VideoRtpDepacketizerVp9::ParseRtpPayload({}, &video_header);
+}
+
 TEST_F(RtpPacketizerVp9Test, TestEqualSizedMode_OnePacket) {
   const size_t kFrameSize = 25;
   const size_t kPacketSize = 26;
diff --git a/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_packet.h b/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_packet.h
index e91ec6368b..c002e51de6 100644
--- a/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_packet.h
+++ b/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_packet.h
@@ -11,6 +11,7 @@
 #define MODULES_RTP_RTCP_SOURCE_RTP_PACKET_H_
 
 #include <string>
+#include <utility>
 #include <vector>
 
 #include "absl/types/optional.h"
@@ -127,7 +128,7 @@ class RtpPacket {
   bool IsRegistered() const;
 
   template <typename Extension, typename FirstValue, typename... Values>
-  bool GetExtension(FirstValue, Values...) const;
+  bool GetExtension(FirstValue&&, Values&&...) const;
 
   template <typename Extension>
   absl::optional<typename Extension::value_type> GetExtension() const;
@@ -231,11 +232,12 @@ bool RtpPacket::IsRegistered() const {
 }
 
 template <typename Extension, typename FirstValue, typename... Values>
-bool RtpPacket::GetExtension(FirstValue first, Values... values) const {
+bool RtpPacket::GetExtension(FirstValue&& first, Values&&... values) const {
   auto raw = FindExtension(Extension::kId);
   if (raw.empty())
     return false;
-  return Extension::Parse(raw, first, values...);
+  return Extension::Parse(raw, std::forward<FirstValue>(first),
+                          std::forward<Values>(values)...);
 }
 
 template <typename Extension>
diff --git a/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_packet_to_send.cc b/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_packet_to_send.cc
index b55e74aaf0..691a243c5f 100644
--- a/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_packet_to_send.cc
+++ b/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_packet_to_send.cc
@@ -12,6 +12,8 @@
 
 #include <cstdint>
 
+#include "modules/rtp_rtcp/include/rtp_rtcp_defines.h"
+
 namespace webrtc {
 
 RtpPacketToSend::RtpPacketToSend(const ExtensionManager* extensions)
@@ -28,4 +30,13 @@ RtpPacketToSend& RtpPacketToSend::operator=(RtpPacketToSend&& packet) = default;
 
 RtpPacketToSend::~RtpPacketToSend() = default;
 
+void RtpPacketToSend::set_packet_type(RtpPacketMediaType type) {
+  if (packet_type_ == RtpPacketMediaType::kAudio) {
+    original_packet_type_ = OriginalType::kAudio;
+  } else if (packet_type_ == RtpPacketMediaType::kVideo) {
+    original_packet_type_ = OriginalType::kVideo;
+  }
+  packet_type_ = type;
+}
+
 }  // namespace webrtc
diff --git a/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_packet_to_send.h b/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_packet_to_send.h
index 438ca354ed..64f9ee1ab1 100644
--- a/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_packet_to_send.h
+++ b/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_packet_to_send.h
@@ -49,11 +49,18 @@ class RtpPacketToSend : public RtpPacket {
   webrtc::Timestamp capture_time() const { return capture_time_; }
   void set_capture_time(webrtc::Timestamp time) { capture_time_ = time; }
 
-  void set_packet_type(RtpPacketMediaType type) { packet_type_ = type; }
+  void set_packet_type(RtpPacketMediaType type);
+
   absl::optional<RtpPacketMediaType> packet_type() const {
     return packet_type_;
   }
 
+  enum class OriginalType { kAudio, kVideo };
+  // Original type does not change if packet type is changed to kRetransmission.
+  absl::optional<OriginalType> original_packet_type() const {
+    return original_packet_type_;
+  }
+
   // If this is a retransmission, indicates the sequence number of the original
   // media packet that this packet represents. If RTX is used this will likely
   // be different from SequenceNumber().
@@ -133,6 +140,7 @@ class RtpPacketToSend : public RtpPacket {
  private:
   webrtc::Timestamp capture_time_ = webrtc::Timestamp::Zero();
   absl::optional<RtpPacketMediaType> packet_type_;
+  absl::optional<OriginalType> original_packet_type_;
   bool allow_retransmission_ = false;
   absl::optional<uint16_t> retransmitted_sequence_number_;
   rtc::scoped_refptr<rtc::RefCountedBase> additional_data_;
diff --git a/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_packet_unittest.cc b/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_packet_unittest.cc
index b3a9452df9..44f1a9e742 100644
--- a/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_packet_unittest.cc
+++ b/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_packet_unittest.cc
@@ -933,6 +933,41 @@ TEST(RtpPacketTest, GetUncopyableExtension) {
   EXPECT_TRUE(rtp_packet.GetExtension<UncopyableExtension>(&value2));
 }
 
+struct ParseByReferenceExtension {
+  static constexpr RTPExtensionType kId = kRtpExtensionDependencyDescriptor;
+  static constexpr absl::string_view Uri() { return "uri"; }
+
+  static size_t ValueSize(uint8_t value1, uint8_t value2) { return 2; }
+  static bool Write(rtc::ArrayView<uint8_t> data,
+                    uint8_t value1,
+                    uint8_t value2) {
+    data[0] = value1;
+    data[1] = value2;
+    return true;
+  }
+  static bool Parse(rtc::ArrayView<const uint8_t> data,
+                    uint8_t& value1,
+                    uint8_t& value2) {
+    value1 = data[0];
+    value2 = data[1];
+    return true;
+  }
+};
+
+TEST(RtpPacketTest, GetExtensionByReference) {
+  RtpHeaderExtensionMap extensions;
+  extensions.Register<ParseByReferenceExtension>(1);
+  RtpPacket rtp_packet(&extensions);
+  rtp_packet.SetExtension<ParseByReferenceExtension>(13, 42);
+
+  uint8_t value1 = 1;
+  uint8_t value2 = 1;
+  EXPECT_TRUE(
+      rtp_packet.GetExtension<ParseByReferenceExtension>(value1, value2));
+  EXPECT_EQ(int{value1}, 13);
+  EXPECT_EQ(int{value2}, 42);
+}
+
 TEST(RtpPacketTest, CreateAndParseTimingFrameExtension) {
   // Create a packet with video frame timing extension populated.
   RtpPacketToSend::ExtensionManager send_extensions;
diff --git a/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_packetizer_av1_unittest.cc b/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_packetizer_av1_unittest.cc
index 2151a59295..83a2be24ea 100644
--- a/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_packetizer_av1_unittest.cc
+++ b/third_party/libwebrtc/modules/rtp_rtcp/source/rtp_packetizer_av1_unittest.cc
@@ -99,6 +99,12 @@ Av1Frame ReassembleFrame(rtc::ArrayView<const RtpPayload> rtp_payloads) {
   return Av1Frame(VideoRtpDepacketizerAv1().AssembleFrame(payloads));
 }
 
+TEST(RtpPacketizerAv1Test, EmptyPayload) {
+  RtpPacketizer::PayloadSizeLimits limits;
+  RtpPacketizerAv1 packetizer({}, limits, VideoFrameType::kVideoFrameKey, true);
+  EXPECT_EQ(packetizer.NumPackets(), 0u);
+}
+
 TEST(RtpPacketizerAv1Test, PacketizeOneObuWithoutSizeAndExtension) {
   auto kFrame = BuildAv1Frame({Av1Obu(kAv1ObuTypeFrame)
                                    .WithoutSize()
-- 
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