diff options
Diffstat (limited to 'third_party/libwebrtc/pc/rtp_transceiver.cc')
| -rw-r--r-- | third_party/libwebrtc/pc/rtp_transceiver.cc | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/third_party/libwebrtc/pc/rtp_transceiver.cc b/third_party/libwebrtc/pc/rtp_transceiver.cc index 34d744a3bb..de31b2e36a 100644 --- a/third_party/libwebrtc/pc/rtp_transceiver.cc +++ b/third_party/libwebrtc/pc/rtp_transceiver.cc @@ -171,6 +171,35 @@ RtpTransceiver::RtpTransceiver( : media_engine()->voice().send_codecs()); senders_.push_back(sender); receivers_.push_back(receiver); + + // Set default header extensions depending on whether simulcast/SVC is used. + RtpParameters parameters = sender->internal()->GetParametersInternal(); + bool uses_simulcast = parameters.encodings.size() > 1; + bool uses_svc = !parameters.encodings.empty() && + parameters.encodings[0].scalability_mode.has_value() && + parameters.encodings[0].scalability_mode != + ScalabilityModeToString(ScalabilityMode::kL1T1); + if (uses_simulcast || uses_svc) { + // Enable DD and VLA extensions, can be deactivated by the API. + // Skip this if the GFD extension was enabled via field trial + // for backward compability reasons. + bool uses_gfd = + absl::c_find_if( + header_extensions_to_negotiate_, + [](const RtpHeaderExtensionCapability& ext) { + return ext.uri == RtpExtension::kGenericFrameDescriptorUri00 && + ext.direction != webrtc::RtpTransceiverDirection::kStopped; + }) != header_extensions_to_negotiate_.end(); + if (!uses_gfd) { + for (RtpHeaderExtensionCapability& ext : + header_extensions_to_negotiate_) { + if (ext.uri == RtpExtension::kVideoLayersAllocationUri || + ext.uri == RtpExtension::kDependencyDescriptorUri) { + ext.direction = RtpTransceiverDirection::kSendRecv; + } + } + } + } } RtpTransceiver::~RtpTransceiver() { |