1 files changed, 312 insertions, 0 deletions
diff --git a/third_party/libwebrtc/pc/session_description.cc b/third_party/libwebrtc/pc/session_description.cc
new file mode 100644
index 0000000000..0346f8c149
--- /dev/null
+++ b/third_party/libwebrtc/pc/session_description.cc
@@ -0,0 +1,312 @@
+/*
+ *  Copyright 2010 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/session_description.h"
+
+#include "absl/algorithm/container.h"
+#include "absl/memory/memory.h"
+#include "rtc_base/checks.h"
+#include "rtc_base/strings/string_builder.h"
+
+namespace cricket {
+namespace {
+
+ContentInfo* FindContentInfoByName(ContentInfos* contents,
+                                   const std::string& name) {
+  RTC_DCHECK(contents);
+  for (ContentInfo& content : *contents) {
+    if (content.name == name) {
+      return &content;
+    }
+  }
+  return nullptr;
+}
+
+}  // namespace
+
+const ContentInfo* FindContentInfoByName(const ContentInfos& contents,
+                                         const std::string& name) {
+  for (ContentInfos::const_iterator content = contents.begin();
+       content != contents.end(); ++content) {
+    if (content->name == name) {
+      return &(*content);
+    }
+  }
+  return NULL;
+}
+
+const ContentInfo* FindContentInfoByType(const ContentInfos& contents,
+                                         MediaProtocolType type) {
+  for (const auto& content : contents) {
+    if (content.type == type) {
+      return &content;
+    }
+  }
+  return nullptr;
+}
+
+ContentGroup::ContentGroup(const std::string& semantics)
+    : semantics_(semantics) {}
+
+ContentGroup::ContentGroup(const ContentGroup&) = default;
+ContentGroup::ContentGroup(ContentGroup&&) = default;
+ContentGroup& ContentGroup::operator=(const ContentGroup&) = default;
+ContentGroup& ContentGroup::operator=(ContentGroup&&) = default;
+ContentGroup::~ContentGroup() = default;
+
+const std::string* ContentGroup::FirstContentName() const {
+  return (!content_names_.empty()) ? &(*content_names_.begin()) : NULL;
+}
+
+bool ContentGroup::HasContentName(absl::string_view content_name) const {
+  return absl::c_linear_search(content_names_, content_name);
+}
+
+void ContentGroup::AddContentName(absl::string_view content_name) {
+  if (!HasContentName(content_name)) {
+    content_names_.emplace_back(content_name);
+  }
+}
+
+bool ContentGroup::RemoveContentName(absl::string_view content_name) {
+  ContentNames::iterator iter = absl::c_find(content_names_, content_name);
+  if (iter == content_names_.end()) {
+    return false;
+  }
+  content_names_.erase(iter);
+  return true;
+}
+
+std::string ContentGroup::ToString() const {
+  rtc::StringBuilder acc;
+  acc << semantics_ << "(";
+  if (!content_names_.empty()) {
+    for (const auto& name : content_names_) {
+      acc << name << " ";
+    }
+  }
+  acc << ")";
+  return acc.Release();
+}
+
+SessionDescription::SessionDescription() = default;
+SessionDescription::SessionDescription(const SessionDescription&) = default;
+
+SessionDescription::~SessionDescription() {}
+
+std::unique_ptr<SessionDescription> SessionDescription::Clone() const {
+  // Copy using the private copy constructor.
+  // This will clone the descriptions using ContentInfo's copy constructor.
+  return absl::WrapUnique(new SessionDescription(*this));
+}
+
+const ContentInfo* SessionDescription::GetContentByName(
+    const std::string& name) const {
+  return FindContentInfoByName(contents_, name);
+}
+
+ContentInfo* SessionDescription::GetContentByName(const std::string& name) {
+  return FindContentInfoByName(&contents_, name);
+}
+
+const MediaContentDescription* SessionDescription::GetContentDescriptionByName(
+    const std::string& name) const {
+  const ContentInfo* cinfo = FindContentInfoByName(contents_, name);
+  if (cinfo == NULL) {
+    return NULL;
+  }
+
+  return cinfo->media_description();
+}
+
+MediaContentDescription* SessionDescription::GetContentDescriptionByName(
+    const std::string& name) {
+  ContentInfo* cinfo = FindContentInfoByName(&contents_, name);
+  if (cinfo == NULL) {
+    return NULL;
+  }
+
+  return cinfo->media_description();
+}
+
+const ContentInfo* SessionDescription::FirstContentByType(
+    MediaProtocolType type) const {
+  return FindContentInfoByType(contents_, type);
+}
+
+const ContentInfo* SessionDescription::FirstContent() const {
+  return (contents_.empty()) ? NULL : &(*contents_.begin());
+}
+
+void SessionDescription::AddContent(
+    const std::string& name,
+    MediaProtocolType type,
+    std::unique_ptr<MediaContentDescription> description) {
+  ContentInfo content(type);
+  content.name = name;
+  content.set_media_description(std::move(description));
+  AddContent(std::move(content));
+}
+
+void SessionDescription::AddContent(
+    const std::string& name,
+    MediaProtocolType type,
+    bool rejected,
+    std::unique_ptr<MediaContentDescription> description) {
+  ContentInfo content(type);
+  content.name = name;
+  content.rejected = rejected;
+  content.set_media_description(std::move(description));
+  AddContent(std::move(content));
+}
+
+void SessionDescription::AddContent(
+    const std::string& name,
+    MediaProtocolType type,
+    bool rejected,
+    bool bundle_only,
+    std::unique_ptr<MediaContentDescription> description) {
+  ContentInfo content(type);
+  content.name = name;
+  content.rejected = rejected;
+  content.bundle_only = bundle_only;
+  content.set_media_description(std::move(description));
+  AddContent(std::move(content));
+}
+
+void SessionDescription::AddContent(ContentInfo&& content) {
+  if (extmap_allow_mixed()) {
+    // Mixed support on session level overrides setting on media level.
+    content.media_description()->set_extmap_allow_mixed_enum(
+        MediaContentDescription::kSession);
+  }
+  contents_.push_back(std::move(content));
+}
+
+bool SessionDescription::RemoveContentByName(const std::string& name) {
+  for (ContentInfos::iterator content = contents_.begin();
+       content != contents_.end(); ++content) {
+    if (content->name == name) {
+      contents_.erase(content);
+      return true;
+    }
+  }
+
+  return false;
+}
+
+void SessionDescription::AddTransportInfo(const TransportInfo& transport_info) {
+  transport_infos_.push_back(transport_info);
+}
+
+bool SessionDescription::RemoveTransportInfoByName(const std::string& name) {
+  for (TransportInfos::iterator transport_info = transport_infos_.begin();
+       transport_info != transport_infos_.end(); ++transport_info) {
+    if (transport_info->content_name == name) {
+      transport_infos_.erase(transport_info);
+      return true;
+    }
+  }
+  return false;
+}
+
+const TransportInfo* SessionDescription::GetTransportInfoByName(
+    const std::string& name) const {
+  for (TransportInfos::const_iterator iter = transport_infos_.begin();
+       iter != transport_infos_.end(); ++iter) {
+    if (iter->content_name == name) {
+      return &(*iter);
+    }
+  }
+  return NULL;
+}
+
+TransportInfo* SessionDescription::GetTransportInfoByName(
+    const std::string& name) {
+  for (TransportInfos::iterator iter = transport_infos_.begin();
+       iter != transport_infos_.end(); ++iter) {
+    if (iter->content_name == name) {
+      return &(*iter);
+    }
+  }
+  return NULL;
+}
+
+void SessionDescription::RemoveGroupByName(const std::string& name) {
+  for (ContentGroups::iterator iter = content_groups_.begin();
+       iter != content_groups_.end(); ++iter) {
+    if (iter->semantics() == name) {
+      content_groups_.erase(iter);
+      break;
+    }
+  }
+}
+
+bool SessionDescription::HasGroup(const std::string& name) const {
+  for (ContentGroups::const_iterator iter = content_groups_.begin();
+       iter != content_groups_.end(); ++iter) {
+    if (iter->semantics() == name) {
+      return true;
+    }
+  }
+  return false;
+}
+
+const ContentGroup* SessionDescription::GetGroupByName(
+    const std::string& name) const {
+  for (ContentGroups::const_iterator iter = content_groups_.begin();
+       iter != content_groups_.end(); ++iter) {
+    if (iter->semantics() == name) {
+      return &(*iter);
+    }
+  }
+  return NULL;
+}
+
+std::vector<const ContentGroup*> SessionDescription::GetGroupsByName(
+    const std::string& name) const {
+  std::vector<const ContentGroup*> content_groups;
+  for (const ContentGroup& content_group : content_groups_) {
+    if (content_group.semantics() == name) {
+      content_groups.push_back(&content_group);
+    }
+  }
+  return content_groups;
+}
+
+ContentInfo::~ContentInfo() {
+}
+
+// Copy operator.
+ContentInfo::ContentInfo(const ContentInfo& o)
+    : name(o.name),
+      type(o.type),
+      rejected(o.rejected),
+      bundle_only(o.bundle_only),
+      description_(o.description_->Clone()) {}
+
+ContentInfo& ContentInfo::operator=(const ContentInfo& o) {
+  name = o.name;
+  type = o.type;
+  rejected = o.rejected;
+  bundle_only = o.bundle_only;
+  description_ = o.description_->Clone();
+  return *this;
+}
+
+const MediaContentDescription* ContentInfo::media_description() const {
+  return description_.get();
+}
+
+MediaContentDescription* ContentInfo::media_description() {
+  return description_.get();
+}
+
+}  // namespace cricket