Move direct use of VideoCapturer::VideoAdapter to VideoSinkWants.

webrtc/media/base/videocapturer.cc

 /*
  *  Copyright (c) 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.
  */
 
@@ skipping 316 matching lines @@
     const rtc::VideoSinkWants& wants) {
   broadcaster_.AddOrUpdateSink(sink, wants);
   OnSinkWantsChanged(broadcaster_.wants());
 }
 
 void VideoCapturer::OnSinkWantsChanged(const rtc::VideoSinkWants& wants) {
   apply_rotation_ = wants.rotation_applied;
   if (frame_factory_) {
     frame_factory_->SetApplyRotation(apply_rotation_);
   }
+
+  // Do not adapt resolution for screen content as this will likely result in
+  // blurry and unreadable text.
+  if (wants.resolution != rtc::VideoSinkWants::Resolution::KEEP &&
+      !IsScreencast() && video_adapter()) {
+    video_adapter()->OnCpuResolutionRequest(
+        wants.resolution == rtc::VideoSinkWants::Resolution::DOWN ?
+        CoordinatedVideoAdapter::DOWNGRADE : CoordinatedVideoAdapter::UPGRADE);
+  }
 }
 
 void VideoCapturer::OnFrameCaptured(VideoCapturer*,
                                     const CapturedFrame* captured_frame) {
   if (muted_) {
     if (black_frame_count_down_ == 0) {
       thread_->Post(this, MSG_DO_PAUSE, NULL);
     } else {
       --black_frame_count_down_;
     }
@@ skipping 371 matching lines @@
 void VideoCapturer::GetVariableSnapshot(
     const rtc::RollingAccumulator<T>& data,
     VariableInfo<T>* stats) {
   stats->max_val = data.ComputeMax();
   stats->mean = data.ComputeMean();
   stats->min_val = data.ComputeMin();
   stats->variance = data.ComputeVariance();
 }
 
 }  // namespace cricket