Reland of Add task queue to Call.

webrtc/video/video_send_stream.h

Index: webrtc/video/video_send_stream.h
diff --git a/webrtc/video/video_send_stream.h b/webrtc/video/video_send_stream.h
index c67dc70199b989e41a129deba1bbccdb758d564b..932264265dddf75e3e762b6325141c0e4ae07957 100644
--- a/webrtc/video/video_send_stream.h
+++ b/webrtc/video/video_send_stream.h
@@ -17,6 +17,8 @@
 
 #include "webrtc/call/bitrate_allocator.h"
 #include "webrtc/base/criticalsection.h"
+#include "webrtc/base/event.h"
+#include "webrtc/base/task_queue.h"
 #include "webrtc/call.h"
 #include "webrtc/common_video/libyuv/include/webrtc_libyuv.h"
 #include "webrtc/modules/video_coding/protection_bitrate_calculator.h"
@@ -24,7 +26,6 @@
 #include "webrtc/video/payload_router.h"
 #include "webrtc/video/send_delay_stats.h"
 #include "webrtc/video/send_statistics_proxy.h"
-#include "webrtc/video/video_capture_input.h"
 #include "webrtc/video/vie_encoder.h"
 #include "webrtc/video_receive_stream.h"
 #include "webrtc/video_send_stream.h"
@@ -37,32 +38,29 @@ class CongestionController;
 class IvfFileWriter;
 class ProcessThread;
 class RtpRtcp;
-class ViEEncoder;
 class VieRemb;
 class RtcEventLog;
 
-namespace vcm {
-class VideoSender;
-}  // namespace vcm
-
 namespace internal {
 
-class VideoSendStream : public webrtc::VideoSendStream,
-                        public webrtc::CpuOveruseObserver,
-                        public webrtc::BitrateAllocatorObserver,
-                        public webrtc::VCMProtectionCallback,
-                        public EncodedImageCallback {
+class VideoSendStreamImpl;
+
+// VideoSendStream implements webrtc::VideoSendStream.
+// Internally, it delegates all public methods to VideoSendStreamImpl and / or
+// VieEncoder. VideoSendStreamInternal is created and deleted on |worker_queue|.
+class VideoSendStream : public webrtc::VideoSendStream {
  public:
   VideoSendStream(int num_cpu_cores,
                   ProcessThread* module_process_thread,
+                  rtc::TaskQueue* worker_queue,
                   CallStats* call_stats,
                   CongestionController* congestion_controller,
                   BitrateAllocator* bitrate_allocator,
                   SendDelayStats* send_delay_stats,
                   VieRemb* remb,
                   RtcEventLog* event_log,
-                  const VideoSendStream::Config& config,
-                  const VideoEncoderConfig& encoder_config,
+                  VideoSendStream::Config config,
+                  VideoEncoderConfig encoder_config,
                   const std::map<uint32_t, RtpState>& suspended_ssrcs);
 
   ~VideoSendStream() override;
@@ -74,101 +72,26 @@ class VideoSendStream : public webrtc::VideoSendStream,
   void Start() override;
   void Stop() override;
   VideoCaptureInput* Input() override;
-  void ReconfigureVideoEncoder(const VideoEncoderConfig& config) override;
+  void ReconfigureVideoEncoder(VideoEncoderConfig) override;
   Stats GetStats() override;
 
-  // webrtc::CpuOveruseObserver implementation.
-  void OveruseDetected() override;
-  void NormalUsage() override;
-
   typedef std::map<uint32_t, RtpState> RtpStateMap;
-  RtpStateMap GetRtpStates() const;
-
-  int GetPaddingNeededBps() const;
-
-  // Implements BitrateAllocatorObserver.
-  uint32_t OnBitrateUpdated(uint32_t bitrate_bps,
-                            uint8_t fraction_loss,
-                            int64_t rtt) override;
-
- protected:
-  // Implements webrtc::VCMProtectionCallback.
-  int ProtectionRequest(const FecProtectionParams* delta_params,
-                        const FecProtectionParams* key_params,
-                        uint32_t* sent_video_rate_bps,
-                        uint32_t* sent_nack_rate_bps,
-                        uint32_t* sent_fec_rate_bps) override;
+  RtpStateMap StopPermanentlyAndGetRtpStates();
 
  private:
-  struct EncoderSettings {
-    VideoCodec video_codec;
-    VideoEncoderConfig config;
-  };
-
-  // Implements EncodedImageCallback. The implementation routes encoded frames
-  // to the |payload_router_| and |config.pre_encode_callback| if set.
-  // Called on an arbitrary encoder callback thread.
-  EncodedImageCallback::Result OnEncodedImage(
-      const EncodedImage& encoded_image,
-      const CodecSpecificInfo* codec_specific_info,
-      const RTPFragmentationHeader* fragmentation) override;
+  class ConstructionTask;
+  class DestructAndGetRtpStateTask;
 
-  static bool EncoderThreadFunction(void* obj);
-  void EncoderProcess();
-
-  void ConfigureProtection();
-  void ConfigureSsrcs();
+  rtc::ThreadChecker thread_checker_;
+  rtc::TaskQueue* const worker_queue_;
+  rtc::Event thread_sync_event_;
 
   SendStatisticsProxy stats_proxy_;
   const VideoSendStream::Config config_;
-  std::map<uint32_t, RtpState> suspended_ssrcs_;
-
-  ProcessThread* const module_process_thread_;
-  CallStats* const call_stats_;
-  CongestionController* const congestion_controller_;
-  BitrateAllocator* const bitrate_allocator_;
-  VieRemb* const remb_;
-
-  static const bool kEnableFrameRecording = false;
-  static const int kMaxLayers = 3;
-  std::unique_ptr<IvfFileWriter> file_writers_[kMaxLayers];
-
-  rtc::PlatformThread encoder_thread_;
-  rtc::Event encoder_wakeup_event_;
-  volatile int stop_encoder_thread_;
-  rtc::CriticalSection encoder_settings_crit_;
-  std::unique_ptr<EncoderSettings> pending_encoder_settings_
-      GUARDED_BY(encoder_settings_crit_);
-  uint32_t encoder_max_bitrate_bps_ GUARDED_BY(encoder_settings_crit_);
-  uint32_t encoder_target_rate_bps_ GUARDED_BY(encoder_settings_crit_);
-
-  enum class State {
-    kStopped,  // VideoSendStream::Start has not yet been called.
-    kStarted,  // VideoSendStream::Start has been called.
-    // VideoSendStream::Start has been called but the encoder have timed out.
-    kEncoderTimedOut,
-  };
-  rtc::Optional<State> pending_state_change_ GUARDED_BY(encoder_settings_crit_);
-
-  // Only used on the encoder thread.
-  rtc::ThreadChecker encoder_thread_checker_;
-  State state_ ACCESS_ON(&encoder_thread_checker_);
-  std::unique_ptr<EncoderSettings> current_encoder_settings_
-      ACCESS_ON(&encoder_thread_checker_);
-
-  OveruseFrameDetector overuse_detector_;
-  ViEEncoder vie_encoder_;
-  EncoderStateFeedback encoder_feedback_;
-  ProtectionBitrateCalculator protection_bitrate_calculator_;
-
-  vcm::VideoSender* const video_sender_;
-
-  const std::unique_ptr<RtcpBandwidthObserver> bandwidth_observer_;
-  // RtpRtcp modules, declared here as they use other members on construction.
-  const std::vector<RtpRtcp*> rtp_rtcp_modules_;
-  PayloadRouter payload_router_;
-  VideoCaptureInput input_;
+  std::unique_ptr<VideoSendStreamImpl> send_stream_;
+  std::unique_ptr<ViEEncoder> vie_encoder_;
 };
+
 }  // namespace internal
 }  // namespace webrtc