1 files changed, 57 insertions, 0 deletions
diff --git a/third_party/libwebrtc/pc/simulcast_description.cc b/third_party/libwebrtc/pc/simulcast_description.cc
new file mode 100644
index 0000000000..ec87415677
--- /dev/null
+++ b/third_party/libwebrtc/pc/simulcast_description.cc
@@ -0,0 +1,57 @@
+/*
+ *  Copyright 2018 The WebRTC Project Authors. All rights reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "pc/simulcast_description.h"
+
+#include "rtc_base/checks.h"
+
+namespace cricket {
+
+SimulcastLayer::SimulcastLayer(absl::string_view rid, bool is_paused)
+    : rid{rid}, is_paused{is_paused} {
+  RTC_DCHECK(!rid.empty());
+}
+
+bool SimulcastLayer::operator==(const SimulcastLayer& other) const {
+  return rid == other.rid && is_paused == other.is_paused;
+}
+
+void SimulcastLayerList::AddLayer(const SimulcastLayer& layer) {
+  list_.push_back({layer});
+}
+
+void SimulcastLayerList::AddLayerWithAlternatives(
+    const std::vector<SimulcastLayer>& rids) {
+  RTC_DCHECK(!rids.empty());
+  list_.push_back(rids);
+}
+
+const std::vector<SimulcastLayer>& SimulcastLayerList::operator[](
+    size_t index) const {
+  RTC_DCHECK_LT(index, list_.size());
+  return list_[index];
+}
+
+bool SimulcastDescription::empty() const {
+  return send_layers_.empty() && receive_layers_.empty();
+}
+
+std::vector<SimulcastLayer> SimulcastLayerList::GetAllLayers() const {
+  std::vector<SimulcastLayer> result;
+  for (auto groupIt = begin(); groupIt != end(); groupIt++) {
+    for (auto it = groupIt->begin(); it != groupIt->end(); it++) {
+      result.push_back(*it);
+    }
+  }
+
+  return result;
+}
+
+}  // namespace cricket