In screenshare mode, suppress VP8 bitrate overshoot and increase quality

webrtc/modules/video_coding/codecs/vp8/temporal_layers.h

 /* Copyright (c) 2011 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.
 */
 /*
 * This file defines the interface for doing temporal layers with VP8.
@@ skipping 29 matching lines @@
 
   virtual bool ConfigureBitrates(int bitrate_kbit,
                                  int max_bitrate_kbit,
                                  int framerate,
                                  vpx_codec_enc_cfg_t* cfg) = 0;
 
   virtual void PopulateCodecSpecific(bool base_layer_sync,
                                      CodecSpecificInfoVP8* vp8_info,
                                      uint32_t timestamp) = 0;
 
-  virtual void FrameEncoded(unsigned int size, uint32_t timestamp) = 0;
+  virtual void FrameEncoded(unsigned int size, uint32_t timestamp, int qp) = 0;
 
   virtual int CurrentLayerId() const = 0;
+
+  virtual bool UpdateConfiguration(vpx_codec_enc_cfg_t* cfg) = 0;
 };
 
 // Factory for a temporal layers strategy that adaptively changes the number of
 // layers based on input framerate so that the base layer has an acceptable
 // framerate. See realtime_temporal_layers.cc
 struct RealTimeTemporalLayersFactory : TemporalLayers::Factory {
   virtual ~RealTimeTemporalLayersFactory() {}
   virtual TemporalLayers* Create(int num_temporal_layers,
                                  uint8_t initial_tl0_pic_idx) const;
 };
 
 }  // namespace webrtc
 #endif  // WEBRTC_MODULES_VIDEO_CODING_CODECS_VP8_TEMPORAL_LAYERS_H_