Bug 1934695 - Vendor libwebrtc from 711ecf44bb

We already cherry-picked this when we vendored 79aff54b0f.

Upstream commit: https://webrtc.googlesource.com/src/+/711ecf44bb1247977f1ea0d8cda5e767af05b388
    [M132] h264: skip empty NAL units, do not reject them

    BUG=webrtc:380291923,chromium:381016774

    (cherry picked from commit b7cb8fe75a0b0f19a003e4f78f83fb7bd8fa84ef)

    Change-Id: If05268bde2ac0c600dcef479c88ca54dce708dcb
    Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/368893
    Reviewed-by: Danil Chapovalov <danilchap@webrtc.org>
    Reviewed-by: Sergey Silkin <ssilkin@webrtc.org>
    Commit-Queue: Philipp Hancke <phancke@meta.com>
    Cr-Original-Commit-Position: refs/heads/main@{#43451}
    Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/369480
    Commit-Queue: Sergey Silkin <ssilkin@webrtc.org>
    Cr-Commit-Position: refs/branch-heads/6834@{#3}
    Cr-Branched-From: a5d71009ac1dce7da23813dc9413c03073cfa8ca-refs/heads/main@{#43387}

third_party/libwebrtc/README.moz-ff-commit

@@ -33972,3 +33972,6 @@ a5d71009ac
 # MOZ_LIBWEBRTC_SRC=/Users/mfroman/no_tm_backup/elm/.moz-fast-forward/moz-libwebrtc MOZ_LIBWEBRTC_BRANCH=mozpatches bash dom/media/webrtc/third_party_build/fast-forward-libwebrtc.sh
 # base of lastest vendoring
 18db2cac3f
+# MOZ_LIBWEBRTC_SRC=/Users/mfroman/no_tm_backup/elm/.moz-fast-forward/moz-libwebrtc MOZ_LIBWEBRTC_BRANCH=mozpatches bash dom/media/webrtc/third_party_build/fast-forward-libwebrtc.sh
+# base of lastest vendoring
+711ecf44bb

third_party/libwebrtc/README.mozilla

@@ -22674,3 +22674,5 @@ libwebrtc updated from /Users/mfroman/no_tm_backup/elm/.moz-fast-forward/moz-lib
 libwebrtc updated from /Users/mfroman/no_tm_backup/elm/.moz-fast-forward/moz-libwebrtc commit mozpatches on 2024-12-05T22:21:31.486441+00:00.
 # ./mach python dom/media/webrtc/third_party_build/vendor-libwebrtc.py --from-local /Users/mfroman/no_tm_backup/elm/.moz-fast-forward/moz-libwebrtc --commit mozpatches libwebrtc
 libwebrtc updated from /Users/mfroman/no_tm_backup/elm/.moz-fast-forward/moz-libwebrtc commit mozpatches on 2024-12-05T22:24:12.966738+00:00.
+# ./mach python dom/media/webrtc/third_party_build/vendor-libwebrtc.py --from-local /Users/mfroman/no_tm_backup/elm/.moz-fast-forward/moz-libwebrtc --commit mozpatches libwebrtc
+libwebrtc updated from /Users/mfroman/no_tm_backup/elm/.moz-fast-forward/moz-libwebrtc commit mozpatches on 2024-12-05T22:25:49.225051+00:00.

third_party/libwebrtc/modules/rtp_rtcp/source/video_rtp_depacketizer_h264.cc

@@ -101,8 +101,8 @@ std::optional<VideoRtpDepacketizer::ParsedRtpPayload> ProcessStapAOrSingleNalu(
         nal_unit.subview(H264::kNaluTypeSize);
 
     if (nalu_data.empty()) {
-      RTC_LOG(LS_ERROR) << "Empty NAL unit found.";
-      return std::nullopt;
+      RTC_LOG(LS_WARNING) << "Skipping empty NAL unit.";
+      continue;
     }
 
     switch (nalu.type) {

third_party/libwebrtc/modules/rtp_rtcp/source/video_rtp_depacketizer_h264_unittest.cc

@@ -542,5 +542,15 @@ TEST(VideoRtpDepacketizerH264Test, SeiSetsFirstPacketInFrame) {
   EXPECT_TRUE(parsed->video_header.is_first_packet_in_frame);
 }
 
+TEST(VideoRtpDepacketizerH264Test, EmptyNaluPayload) {
+  const uint8_t kPayload[] = {
+      0x10,  // End of sequence.
+  };
+  VideoRtpDepacketizerH264 depacketizer;
+  std::optional<VideoRtpDepacketizer::ParsedRtpPayload> parsed =
+      depacketizer.Parse(rtc::CopyOnWriteBuffer(kPayload));
+  ASSERT_TRUE(parsed);
+}
+
 }  // namespace
 }  // namespace webrtc