Fixed VP8 simulcast full-stack-tests to not decode non-selected streams.

webrtc/video/video_quality_test.cc

 /*
  *  Copyright (c) 2015 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 "webrtc/video/video_quality_test.h"
@@ skipping 1253 matching lines @@
 
   CreateMatchingReceiveConfigs(recv_transport);
 
   for (size_t i = 0; i < num_video_streams; ++i) {
     video_receive_configs_[i].rtp.nack.rtp_history_ms = kNackRtpHistoryMs;
     video_receive_configs_[i].rtp.rtx_ssrc = kSendRtxSsrcs[i];
     video_receive_configs_[i].rtp.rtx_payload_types[payload_type] =
         kSendRtxPayloadType;
     video_receive_configs_[i].rtp.transport_cc = params_.call.send_side_bwe;
     video_receive_configs_[i].rtp.remb = !params_.call.send_side_bwe;
+    if (i != params_.ss.selected_stream) {

[sprang_webrtc, 2017/03/02 15:27:29]

Maybe add a comment explaining what is going on here.

[ilnik, 2017/03/02 15:37:19]

Done.

+      VideoReceiveStream::Decoder decoder;
+      decoder.decoder = new test::FakeDecoder();
+      decoder.payload_type = video_send_config_.encoder_settings.payload_type;
+      decoder.payload_name = video_send_config_.encoder_settings.payload_name;
+      video_receive_configs_[i].decoders.clear();
+      allocated_decoders_.push_back(
+          std::unique_ptr<VideoDecoder>(decoder.decoder));

[sprang_webrtc, 2017/03/02 15:27:29]

nit: you can even just do 
  allocated_decoders_.emplace_back(decoder.decoder);

[ilnik, 2017/03/02 15:37:19]

Done.

+      video_receive_configs_[i].decoders.push_back(decoder);
+    }
   }
 
   if (params_.video.flexfec) {
     // Override send config constructed by CreateSendConfig.
     video_send_config_.rtp.flexfec.protected_media_ssrcs = {
         kVideoSendSsrcs[params_.ss.selected_stream]};
 
     // The matching receive config is _not_ created by
     // CreateMatchingReceiveConfigs, since VideoQualityTest is not a BaseTest.
     // Set up the receive config manually instead.
@@ skipping 429 matching lines @@
     std::ostringstream str;
     str << receive_logs_++;
     std::string path =
         params_.video.encoded_frame_base_path + "." + str.str() + ".recv.ivf";
     stream->EnableEncodedFrameRecording(rtc::CreatePlatformFile(path),
                                         10000000);
   }
 }
 
 }  // namespace webrtc