Let ViEEncoder tell VideoSendStream about reconfigurations.

webrtc/video/vie_encoder.h

 /*
  *  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 31 matching lines @@
 //  Instantiate.
 //  Call SetSink.
 //  Call SetSource.
 //  Call ConfigureEncoder with the codec settings.
 //  Call Stop() when done.
 class ViEEncoder : public rtc::VideoSinkInterface<VideoFrame>,
                    public EncodedImageCallback,
                    public VCMSendStatisticsCallback,
                    public CpuOveruseObserver {
  public:
+  // Interface for receiving encoded video frames and notifications about
+  // configuration changes.
+  class EncoderSink : public EncodedImageCallback {
+   public:
+    virtual void OnEncoderConfigurationChanged(
+        std::vector<VideoStream> streams,
+        int min_transmit_bitrate_bps) = 0;
+  };
+
   ViEEncoder(uint32_t number_of_cores,
              SendStatisticsProxy* stats_proxy,
              const webrtc::VideoSendStream::Config::EncoderSettings& settings,
              rtc::VideoSinkInterface<VideoFrame>* pre_encode_callback,
              LoadObserver* overuse_callback,
              EncodedFrameObserver* encoder_timing);
   ~ViEEncoder();
   // RegisterProcessThread register |module_process_thread| with those objects
   // that use it. Registration has to happen on the thread where
   // |module_process_thread| was created (libjingle's worker thread).
   // TODO(perkj): Replace the use of |module_process_thread| with a TaskQueue.
   void RegisterProcessThread(ProcessThread* module_process_thread);
   void DeRegisterProcessThread();
 
   void SetSource(rtc::VideoSourceInterface<VideoFrame>* source);
-  void SetSink(EncodedImageCallback* sink);
+  void SetSink(EncoderSink* sink);
 
   // TODO(perkj): Can we remove VideoCodec.startBitrate ?
   void SetStartBitrate(int start_bitrate_bps);
 
-  void ConfigureEncoder(const VideoEncoderConfig& config,
+  void ConfigureEncoder(VideoEncoderConfig config,
                         size_t max_data_payload_length);
 
   // Permanently stop encoding. After this method has returned, it is
   // guaranteed that no encoded frames will be delivered to the sink.
   void Stop();
 
   void SendKeyFrame();
 
   // virtual to test EncoderStateFeedback with mocks.
   virtual void OnReceivedIntraFrameRequest(size_t stream_index);
   virtual void OnReceivedSLI(uint8_t picture_id);
   virtual void OnReceivedRPSI(uint64_t picture_id);
 
   void OnBitrateUpdated(uint32_t bitrate_bps,
                         uint8_t fraction_lost,
                         int64_t round_trip_time_ms);
 
  private:
   class EncodeTask;
   class VideoSourceProxy;
 
   void ConfigureEncoderInternal(const VideoCodec& video_codec,
-                                size_t max_data_payload_length);
+                                size_t max_data_payload_length,
+                                std::vector<VideoStream> stream,
+                                int min_transmit_bitrate);
 
   // Implements VideoSinkInterface.
   void OnFrame(const VideoFrame& video_frame) override;
 
   // Implements VideoSendStatisticsCallback.
   void SendStatistics(uint32_t bit_rate,
                       uint32_t frame_rate) override;
 
   void EncodeVideoFrame(const VideoFrame& frame,
                         int64_t time_when_posted_in_ms);
@@ skipping 10 matching lines @@
 
   bool EncoderPaused() const;
   void TraceFrameDropStart();
   void TraceFrameDropEnd();
 
   rtc::Event shutdown_event_;
 
   const uint32_t number_of_cores_;
 
   const std::unique_ptr<VideoSourceProxy> source_proxy_;
-  EncodedImageCallback* sink_;
+  EncoderSink* sink_;
   const VideoSendStream::Config::EncoderSettings settings_;
 
   const std::unique_ptr<VideoProcessing> vp_;
   vcm::VideoSender video_sender_ ACCESS_ON(&encoder_queue_);
 
   OveruseFrameDetector overuse_detector_ ACCESS_ON(&encoder_queue_);
   LoadObserver* const load_observer_ ACCESS_ON(&encoder_queue_);
 
   SendStatisticsProxy* const stats_proxy_;
   rtc::VideoSinkInterface<VideoFrame>* const pre_encode_callback_;
@@ skipping 28 matching lines @@
   // All public methods are proxied to |encoder_queue_|. It must must be
   // destroyed first to make sure no tasks are run that use other members.
   rtc::TaskQueue encoder_queue_;
 
   RTC_DISALLOW_COPY_AND_ASSIGN(ViEEncoder);
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_VIDEO_VIE_ENCODER_H_