1 files changed, 73 insertions, 0 deletions
diff --git a/third_party/libwebrtc/pc/sdp_utils.cc b/third_party/libwebrtc/pc/sdp_utils.cc
new file mode 100644
index 0000000000..ca61f0013f
--- /dev/null
+++ b/third_party/libwebrtc/pc/sdp_utils.cc
@@ -0,0 +1,73 @@
+/*
+ *  Copyright 2017 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/sdp_utils.h"
+
+#include <utility>
+#include <vector>
+
+#include "api/jsep_session_description.h"
+#include "rtc_base/checks.h"
+
+namespace webrtc {
+
+std::unique_ptr<SessionDescriptionInterface> CloneSessionDescription(
+    const SessionDescriptionInterface* sdesc) {
+  RTC_DCHECK(sdesc);
+  return CloneSessionDescriptionAsType(sdesc, sdesc->GetType());
+}
+
+std::unique_ptr<SessionDescriptionInterface> CloneSessionDescriptionAsType(
+    const SessionDescriptionInterface* sdesc,
+    SdpType type) {
+  RTC_DCHECK(sdesc);
+  auto clone = std::make_unique<JsepSessionDescription>(type);
+  if (sdesc->description()) {
+    clone->Initialize(sdesc->description()->Clone(), sdesc->session_id(),
+                      sdesc->session_version());
+  }
+  // As of writing, our version of GCC does not allow returning a unique_ptr of
+  // a subclass as a unique_ptr of a base class. To get around this, we need to
+  // std::move the return value.
+  return std::move(clone);
+}
+
+bool SdpContentsAll(SdpContentPredicate pred,
+                    const cricket::SessionDescription* desc) {
+  RTC_DCHECK(desc);
+  for (const auto& content : desc->contents()) {
+    const auto* transport_info = desc->GetTransportInfoByName(content.name);
+    if (!pred(&content, transport_info)) {
+      return false;
+    }
+  }
+  return true;
+}
+
+bool SdpContentsNone(SdpContentPredicate pred,
+                     const cricket::SessionDescription* desc) {
+  return SdpContentsAll(
+      [pred](const cricket::ContentInfo* content_info,
+             const cricket::TransportInfo* transport_info) {
+        return !pred(content_info, transport_info);
+      },
+      desc);
+}
+
+void SdpContentsForEach(SdpContentMutator fn,
+                        cricket::SessionDescription* desc) {
+  RTC_DCHECK(desc);
+  for (auto& content : desc->contents()) {
+    auto* transport_info = desc->GetTransportInfoByName(content.name);
+    fn(&content, transport_info);
+  }
+}
+
+}  // namespace webrtc