Add method cricket::VideoCapturer::NeedsDenoising, use in VideoCapturerTrackSource.

webrtc/api/videocapturertracksource.cc

 /*
  *  Copyright 2012 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 302 matching lines @@
       formats.push_back(cricket::VideoFormat(kDefaultFormat));
     } else {
       // The VideoCapturer implementation doesn't support capability
       // enumeration. We need to guess what the camera supports.
       for (uint32_t i = 0; i < arraysize(kVideoFormats); ++i) {
         formats.push_back(cricket::VideoFormat(kVideoFormats[i]));
       }
     }
   }
 
+  // Get default from the capturer, overridden by constraints, if any.
+  // Note that Chrome no longer uses the webrtc constraints interface.

[perkj_webrtc, 2016/09/14 13:08:27]

Please remove the comment about chrome.

[nisse-webrtc, 2016/09/14 13:20:23]

Done. There are other comments in the code explaining Chrome implications,
what's the rule?

+  needs_denoising_ = video_capturer_->NeedsDenoising();
+
   if (constraints) {
     MediaConstraintsInterface::Constraints mandatory_constraints =
         constraints->GetMandatory();
     MediaConstraintsInterface::Constraints optional_constraints;
     optional_constraints = constraints->GetOptional();
 
     if (video_capturer_->IsScreencast()) {
       // Use the maxWidth and maxHeight allowed by constraints for screencast.
       FromConstraintsForScreencast(mandatory_constraints, &(formats[0]));
     }
@@ skipping 54 matching lines @@
                   capture_state));
     return;
   }
 
   if (capturer == video_capturer_.get()) {
     SetState(GetReadyState(capture_state));
   }
 }
 
 }  // namespace webrtc