1 files changed, 96 insertions, 0 deletions
diff --git a/third_party/libwebrtc/pc/media_stream.cc b/third_party/libwebrtc/pc/media_stream.cc
new file mode 100644
index 0000000000..57be76c6c8
--- /dev/null
+++ b/third_party/libwebrtc/pc/media_stream.cc
@@ -0,0 +1,96 @@
+/*
+ *  Copyright 2011 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/media_stream.h"
+
+#include <stddef.h>
+
+#include <utility>
+
+#include "rtc_base/checks.h"
+
+namespace webrtc {
+
+template <class V>
+static typename V::iterator FindTrack(V* vector, const std::string& track_id) {
+  typename V::iterator it = vector->begin();
+  for (; it != vector->end(); ++it) {
+    if ((*it)->id() == track_id) {
+      break;
+    }
+  }
+  return it;
+}
+
+rtc::scoped_refptr<MediaStream> MediaStream::Create(const std::string& id) {
+  return rtc::make_ref_counted<MediaStream>(id);
+}
+
+MediaStream::MediaStream(const std::string& id) : id_(id) {}
+
+bool MediaStream::AddTrack(rtc::scoped_refptr<AudioTrackInterface> track) {
+  return AddTrack<AudioTrackVector, AudioTrackInterface>(&audio_tracks_, track);
+}
+
+bool MediaStream::AddTrack(rtc::scoped_refptr<VideoTrackInterface> track) {
+  return AddTrack<VideoTrackVector, VideoTrackInterface>(&video_tracks_, track);
+}
+
+bool MediaStream::RemoveTrack(rtc::scoped_refptr<AudioTrackInterface> track) {
+  return RemoveTrack<AudioTrackVector>(&audio_tracks_, track);
+}
+
+bool MediaStream::RemoveTrack(rtc::scoped_refptr<VideoTrackInterface> track) {
+  return RemoveTrack<VideoTrackVector>(&video_tracks_, track);
+}
+
+rtc::scoped_refptr<AudioTrackInterface> MediaStream::FindAudioTrack(
+    const std::string& track_id) {
+  AudioTrackVector::iterator it = FindTrack(&audio_tracks_, track_id);
+  if (it == audio_tracks_.end())
+    return nullptr;
+  return *it;
+}
+
+rtc::scoped_refptr<VideoTrackInterface> MediaStream::FindVideoTrack(
+    const std::string& track_id) {
+  VideoTrackVector::iterator it = FindTrack(&video_tracks_, track_id);
+  if (it == video_tracks_.end())
+    return nullptr;
+  return *it;
+}
+
+template <typename TrackVector, typename Track>
+bool MediaStream::AddTrack(TrackVector* tracks,
+                           rtc::scoped_refptr<Track> track) {
+  typename TrackVector::iterator it = FindTrack(tracks, track->id());
+  if (it != tracks->end())
+    return false;
+  tracks->emplace_back(std::move((track)));
+  FireOnChanged();
+  return true;
+}
+
+template <typename TrackVector>
+bool MediaStream::RemoveTrack(
+    TrackVector* tracks,
+    rtc::scoped_refptr<MediaStreamTrackInterface> track) {
+  RTC_DCHECK(tracks != NULL);
+  if (!track)
+    return false;
+  typename TrackVector::iterator it = FindTrack(tracks, track->id());
+  if (it == tracks->end())
+    return false;
+  tracks->erase(it);
+  FireOnChanged();
+  return true;
+}
+
+}  // namespace webrtc