vp8_impl.cc: Apply boost on golden frames.

webrtc/modules/video_coding/codecs/vp8/vp8_impl.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 108 matching lines @@
       inited_(false),
       timestamp_(0),
       feedback_mode_(false),
       qp_max_(56),  // Setting for max quantizer.
       cpu_speed_default_(-6),
       number_of_cores_(0),
       rc_max_intra_target_(0),
       token_partitions_(VP8_ONE_TOKENPARTITION),
       down_scale_requested_(false),
       down_scale_bitrate_(0),
+      use_gf_boost_(webrtc::field_trial::IsEnabled("WebRTC-VP8-GfBoost")),
       key_frame_request_(kMaxSimulcastStreams, false) {
   uint32_t seed = rtc::Time32();
   srand(seed);
 
   picture_id_.reserve(kMaxSimulcastStreams);
   last_key_frame_picture_id_.reserve(kMaxSimulcastStreams);
   temporal_layers_.reserve(kMaxSimulcastStreams);
   raw_images_.reserve(kMaxSimulcastStreams);
   encoded_images_.reserve(kMaxSimulcastStreams);
   send_stream_.reserve(kMaxSimulcastStreams);
@@ skipping 488 matching lines @@
                       codec_.mode == kScreensharing ? 300 : 1);
     vpx_codec_control(&(encoders_[i]), VP8E_SET_CPUUSED, cpu_speed_[i]);
     vpx_codec_control(&(encoders_[i]), VP8E_SET_TOKEN_PARTITIONS,
                       static_cast<vp8e_token_partitions>(token_partitions_));
     vpx_codec_control(&(encoders_[i]), VP8E_SET_MAX_INTRA_BITRATE_PCT,
                       rc_max_intra_target_);
     // VP8E_SET_SCREEN_CONTENT_MODE 2 = screen content with more aggressive
     // rate control (drop frames on large target bitrate overshoot)
     vpx_codec_control(&(encoders_[i]), VP8E_SET_SCREEN_CONTENT_MODE,
                       codec_.mode == kScreensharing ? 2 : 0);
+    // Apply boost on golden frames (has only effect when resilience is off).
+    if (use_gf_boost_ && codec_.VP8()->resilience == kResilienceOff) {
+      const int kGfBoostPercent = 50;

[brandtr, 2017/03/10 08:21:31]

Maybe we should send in this value as part of the field trial string?

[åsapersson, 2017/03/10 11:01:40]

Sounds good. Done.

+      vpx_codec_control(&(encoders_[i]), VP8E_SET_GF_CBR_BOOST_PCT,
+                        kGfBoostPercent);
+    }
   }
   inited_ = true;
   return WEBRTC_VIDEO_CODEC_OK;
 }
 
 uint32_t VP8EncoderImpl::MaxIntraTarget(uint32_t optimalBuffersize) {
   // Set max to the optimal buffer level (normalized by target BR),
   // and scaled by a scalePar.
   // Max target size = scalePar * optimalBufferSize * targetBR[Kbps].
   // This values is presented in percentage of perFrameBw:
@@ skipping 655 matching lines @@
     return -1;
   }
   if (vpx_codec_control(copy->decoder_, VP8_SET_REFERENCE, ref_frame_) !=
       VPX_CODEC_OK) {
     return -1;
   }
   return 0;
 }
 
 }  // namespace webrtc