Add sdputils.h with useful functions for working with session descriptions
Bug: webrtc:8222
Change-Id: Iedeb65dad493721c5a4eddab254097171dfdb522
Reviewed-on: https://webrtc-review.googlesource.com/7120
Commit-Queue: Steve Anton <steveanton@webrtc.org>
Reviewed-by: Taylor Brandstetter <deadbeef@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#20192}diff --git a/pc/sdputils.cc b/pc/sdputils.cc
new file mode 100644
index 0000000..9339fdb
--- /dev/null
+++ b/pc/sdputils.cc
@@ -0,0 +1,58 @@
+/*
+ * 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/sdputils.h"
+
+#include <utility>
+
+#include "api/jsepsessiondescription.h"
+#include "rtc_base/ptr_util.h"
+
+namespace webrtc {
+
+std::unique_ptr<SessionDescriptionInterface> CloneSessionDescription(
+ const SessionDescriptionInterface* sdesc) {
+ RTC_DCHECK(sdesc);
+ auto clone = rtc::MakeUnique<JsepSessionDescription>(sdesc->type());
+ clone->Initialize(sdesc->description()->Copy(), 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(std::not2(pred), 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
