Move talk/app/webrtc to webrtc/api

talk/app/webrtc/mediastreamobserver.cc

-/*
- * libjingle
- * Copyright 2015 Google Inc.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- *  1. Redistributions of source code must retain the above copyright notice,
- *     this list of conditions and the following disclaimer.
- *  2. Redistributions in binary form must reproduce the above copyright notice,
- *     this list of conditions and the following disclaimer in the documentation
- *     and/or other materials provided with the distribution.
- *  3. The name of the author may not be used to endorse or promote products
- *     derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
- * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
- * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
- * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
- * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include "talk/app/webrtc/mediastreamobserver.h"
-
-#include <algorithm>
-
-namespace webrtc {
-
-MediaStreamObserver::MediaStreamObserver(MediaStreamInterface* stream)
-    : stream_(stream),
-      cached_audio_tracks_(stream->GetAudioTracks()),
-      cached_video_tracks_(stream->GetVideoTracks()) {
-  stream_->RegisterObserver(this);
-}
-
-MediaStreamObserver::~MediaStreamObserver() {
-  stream_->UnregisterObserver(this);
-}
-
-void MediaStreamObserver::OnChanged() {
-  AudioTrackVector new_audio_tracks = stream_->GetAudioTracks();
-  VideoTrackVector new_video_tracks = stream_->GetVideoTracks();
-
-  // Find removed audio tracks.
-  for (const auto& cached_track : cached_audio_tracks_) {
-    auto it = std::find_if(
-        new_audio_tracks.begin(), new_audio_tracks.end(),
-        [cached_track](const AudioTrackVector::value_type& new_track) {
-          return new_track->id().compare(cached_track->id()) == 0;
-        });
-    if (it == new_audio_tracks.end()) {
-      SignalAudioTrackRemoved(cached_track.get(), stream_);
-    }
-  }
-
-  // Find added audio tracks.
-  for (const auto& new_track : new_audio_tracks) {
-    auto it = std::find_if(
-        cached_audio_tracks_.begin(), cached_audio_tracks_.end(),
-        [new_track](const AudioTrackVector::value_type& cached_track) {
-          return new_track->id().compare(cached_track->id()) == 0;
-        });
-    if (it == cached_audio_tracks_.end()) {
-      SignalAudioTrackAdded(new_track.get(), stream_);
-    }
-  }
-
-  // Find removed video tracks.
-  for (const auto& cached_track : cached_video_tracks_) {
-    auto it = std::find_if(
-        new_video_tracks.begin(), new_video_tracks.end(),
-        [cached_track](const VideoTrackVector::value_type& new_track) {
-          return new_track->id().compare(cached_track->id()) == 0;
-        });
-    if (it == new_video_tracks.end()) {
-      SignalVideoTrackRemoved(cached_track.get(), stream_);
-    }
-  }
-
-  // Find added video tracks.
-  for (const auto& new_track : new_video_tracks) {
-    auto it = std::find_if(
-        cached_video_tracks_.begin(), cached_video_tracks_.end(),
-        [new_track](const VideoTrackVector::value_type& cached_track) {
-          return new_track->id().compare(cached_track->id()) == 0;
-        });
-    if (it == cached_video_tracks_.end()) {
-      SignalVideoTrackAdded(new_track.get(), stream_);
-    }
-  }
-
-  cached_audio_tracks_ = new_audio_tracks;
-  cached_video_tracks_ = new_video_tracks;
-}
-
-}  // namespace webrtc