Enabling spatial layers in VP9Impl. Filter layers in the loopback test.

webrtc/modules/video_coding/main/source/codec_database.cc

 /*
  *  Copyright (c) 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 39 matching lines @@
 
   return vp8_settings;
 }
 
 VideoCodecVP9 VideoEncoder::GetDefaultVp9Settings() {
   VideoCodecVP9 vp9_settings;
   memset(&vp9_settings, 0, sizeof(vp9_settings));
 
   vp9_settings.resilience = 1;
   vp9_settings.numberOfTemporalLayers = 1;
+  vp9_settings.numberOfSpatialLayers = 1;
   vp9_settings.denoisingOn = false;
   vp9_settings.frameDroppingOn = true;
   vp9_settings.keyFrameInterval = 3000;
   vp9_settings.adaptiveQpMode = true;
   vp9_settings.numberOfSpatialLayers = 1;
   vp9_settings.flexibleMode = false;
   return vp9_settings;
 }
 
 VideoCodecH264 VideoEncoder::GetDefaultH264Settings() {
@@ skipping 661 matching lines @@
 
 const VCMExtDecoderMapItem* VCMCodecDataBase::FindExternalDecoderItem(
     uint8_t payload_type) const {
   ExternalDecoderMap::const_iterator it = dec_external_map_.find(payload_type);
   if (it != dec_external_map_.end()) {
     return (*it).second;
   }
   return NULL;
 }
 }  // namespace webrtc