Let ViEEncoder express resolution requests as Sinkwants

webrtc/video/send_statistics_proxy.h

 /*
  *  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.
  */
 
@@ skipping 22 matching lines @@
 
 class SendStatisticsProxy : public CpuOveruseMetricsObserver,
                             public RtcpStatisticsCallback,
                             public RtcpPacketTypeCounterObserver,
                             public StreamDataCountersCallback,
                             public BitrateStatisticsObserver,
                             public FrameCountObserver,
                             public SendSideDelayObserver {
  public:
   static const int kStatsTimeoutMs;
+  // Number of required samples to be collected before a metric is added
+  // to a rtc histogram.
+  static const int kMinRequiredMetricsSamples = 200;
 
   SendStatisticsProxy(Clock* clock,
                       const VideoSendStream::Config& config,
                       VideoEncoderConfig::ContentType content_type);
   virtual ~SendStatisticsProxy();
 
   VideoSendStream::Stats GetStats();
 
   virtual void OnSendEncodedImage(const EncodedImage& encoded_image,
                                   const CodecSpecificInfo* codec_info);
   // Used to update incoming frame rate.
   void OnIncomingFrame(int width, int height);
 
+  // Used to indicate that the current input frame resolution is restricted due
+  // to cpu usage.
+  void SetCpuRestrictedResolution(bool cpu_restricted);
+  // Used to update the number of times the input frame resolution has changed
+  // due to cpu adaptation.
+  void OnCpuRestrictedResolutionChanged(bool cpu_restricted_resolution);
+
   void OnEncoderStatsUpdate(uint32_t framerate, uint32_t bitrate);
   void OnSuspendChange(bool is_suspended);
   void OnInactiveSsrc(uint32_t ssrc);
 
   // Used to indicate change in content type, which may require a change in
   // how stats are collected and set the configured preferred media bitrate.
   void OnEncoderReconfigured(const VideoEncoderConfig& encoder_config,
                              uint32_t preferred_bitrate_bps);
 
   // Used to update the encoder target rate.
@@ skipping 97 matching lines @@
     int max_sent_width_per_timestamp_;
     int max_sent_height_per_timestamp_;
     SampleCounter input_width_counter_;
     SampleCounter input_height_counter_;
     SampleCounter sent_width_counter_;
     SampleCounter sent_height_counter_;
     SampleCounter encode_time_counter_;
     BoolSampleCounter key_frame_counter_;
     BoolSampleCounter quality_limited_frame_counter_;
     SampleCounter quality_downscales_counter_;
+    BoolSampleCounter cpu_limited_frame_counter_;
     BoolSampleCounter bw_limited_frame_counter_;
     SampleCounter bw_resolutions_disabled_counter_;
     SampleCounter delay_counter_;
     SampleCounter max_delay_counter_;
     rtc::RateTracker input_frame_rate_tracker_;
     rtc::RateTracker sent_frame_rate_tracker_;
     int64_t first_rtcp_stats_time_ms_;
     int64_t first_rtp_stats_time_ms_;
     ReportBlockStats report_block_stats_;
     const VideoSendStream::Stats start_stats_;
     std::map<int, QpCounters>
         qp_counters_;  // QP counters mapped by spatial idx.
   };
 
   std::unique_ptr<UmaSamplesContainer> uma_container_ GUARDED_BY(crit_);
 };
 
 }  // namespace webrtc
 #endif  // WEBRTC_VIDEO_SEND_STATISTICS_PROXY_H_