Don't re-randomize picture_id/tl0_pic_idx when re-initializing internal encoders.

webrtc/modules/video_coding/codecs/vp8/screenshare_layers.cc

 /* Copyright (c) 2013 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/modules/video_coding/codecs/vp8/screenshare_layers.h"
@@ skipping 65 matching lines @@
 
 ScreenshareLayers::~ScreenshareLayers() {
   UpdateHistograms();
 }
 
 int ScreenshareLayers::CurrentLayerId() const {
   // Codec does not use temporal layers for screenshare.
   return 0;
 }
 
+uint8_t ScreenshareLayers::Tl0PicIdx() const {
+  return tl0_pic_idx_;
+}
+
 TemporalReferences ScreenshareLayers::UpdateLayerConfig(uint32_t timestamp) {
   if (number_of_temporal_layers_ <= 1) {
     // No flags needed for 1 layer screenshare.
     // TODO(pbos): Consider updating only last, and not all buffers.
     return TemporalReferences(kReferenceAndUpdate, kReferenceAndUpdate,
                               kReferenceAndUpdate);
   }
 
   const int64_t now_ms = clock_->TimeInMilliseconds();
   if (target_framerate_.value_or(0) > 0 &&
@@ skipping 321 matching lines @@
       RTC_HISTOGRAM_COUNTS_10000("WebRTC.Video.Screenshare.Layer1.Qp",
                                  stats_.tl1_qp_sum_ / stats_.num_tl1_frames_);
       RTC_HISTOGRAM_COUNTS_10000(
           "WebRTC.Video.Screenshare.Layer1.TargetBitrate",
           stats_.tl1_target_bitrate_sum_ / stats_.num_tl1_frames_);
     }
   }
 }
 
 }  // namespace webrtc