1 files changed, 88 insertions, 0 deletions
diff --git a/third_party/libwebrtc/pc/transceiver_list.cc b/third_party/libwebrtc/pc/transceiver_list.cc
new file mode 100644
index 0000000000..250dfbc9e2
--- /dev/null
+++ b/third_party/libwebrtc/pc/transceiver_list.cc
@@ -0,0 +1,88 @@
+/*
+ *  Copyright 2020 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/transceiver_list.h"
+
+#include <string>
+
+#include "rtc_base/checks.h"
+
+namespace webrtc {
+
+void TransceiverStableState::set_newly_created() {
+  RTC_DCHECK(!has_m_section_);
+  newly_created_ = true;
+}
+
+void TransceiverStableState::SetMSectionIfUnset(
+    absl::optional<std::string> mid,
+    absl::optional<size_t> mline_index) {
+  if (!has_m_section_) {
+    mid_ = mid;
+    mline_index_ = mline_index;
+    has_m_section_ = true;
+  }
+}
+
+void TransceiverStableState::SetRemoteStreamIds(
+    const std::vector<std::string>& ids) {
+  if (!remote_stream_ids_.has_value()) {
+    remote_stream_ids_ = ids;
+  }
+}
+
+void TransceiverStableState::SetInitSendEncodings(
+    const std::vector<RtpEncodingParameters>& encodings) {
+  init_send_encodings_ = encodings;
+}
+
+std::vector<RtpTransceiver*> TransceiverList::ListInternal() const {
+  RTC_DCHECK_RUN_ON(&sequence_checker_);
+  std::vector<RtpTransceiver*> internals;
+  for (auto transceiver : transceivers_) {
+    internals.push_back(transceiver->internal());
+  }
+  return internals;
+}
+
+RtpTransceiverProxyRefPtr TransceiverList::FindBySender(
+    rtc::scoped_refptr<RtpSenderInterface> sender) const {
+  RTC_DCHECK_RUN_ON(&sequence_checker_);
+  for (auto transceiver : transceivers_) {
+    if (transceiver->sender() == sender) {
+      return transceiver;
+    }
+  }
+  return nullptr;
+}
+
+RtpTransceiverProxyRefPtr TransceiverList::FindByMid(
+    const std::string& mid) const {
+  RTC_DCHECK_RUN_ON(&sequence_checker_);
+  for (auto transceiver : transceivers_) {
+    if (transceiver->mid() == mid) {
+      return transceiver;
+    }
+  }
+  return nullptr;
+}
+
+RtpTransceiverProxyRefPtr TransceiverList::FindByMLineIndex(
+    size_t mline_index) const {
+  RTC_DCHECK_RUN_ON(&sequence_checker_);
+  for (auto transceiver : transceivers_) {
+    if (transceiver->internal()->mline_index() == mline_index) {
+      return transceiver;
+    }
+  }
+  return nullptr;
+}
+
+}  // namespace webrtc