Attach TransportFeedbackPacketLossTracker to ANA (PLR only)

webrtc/audio/audio_send_stream.h

Index: webrtc/audio/audio_send_stream.h
diff --git a/webrtc/audio/audio_send_stream.h b/webrtc/audio/audio_send_stream.h
index 05ed3aaeb8cfb7697e0ea8d54a934ea5fb2d2b45..b52c060537a82460a15ca05ccc2c0272a8bcb521 100644
--- a/webrtc/audio/audio_send_stream.h
+++ b/webrtc/audio/audio_send_stream.h
@@ -12,12 +12,14 @@
 #define WEBRTC_AUDIO_AUDIO_SEND_STREAM_H_
 
 #include <memory>
+#include <vector>
 
 #include "webrtc/base/constructormagic.h"
 #include "webrtc/base/thread_checker.h"
 #include "webrtc/call/audio_send_stream.h"
 #include "webrtc/call/audio_state.h"
 #include "webrtc/call/bitrate_allocator.h"
+#include "webrtc/modules/rtp_rtcp/include/rtp_rtcp_defines.h"
 
 namespace webrtc {
 class CongestionController;
@@ -32,7 +34,8 @@ class ChannelProxy;
 
 namespace internal {
 class AudioSendStream final : public webrtc::AudioSendStream,
-                              public webrtc::BitrateAllocatorObserver {
+                              public webrtc::BitrateAllocatorObserver,
+                              public webrtc::TransportFeedbackAdapterObserver {
  public:
   AudioSendStream(const webrtc::AudioSendStream::Config& config,
                   const rtc::scoped_refptr<webrtc::AudioState>& audio_state,
@@ -61,6 +64,11 @@ class AudioSendStream final : public webrtc::AudioSendStream,
                             int64_t rtt,
                             int64_t probing_interval_ms) override;
 
+  // From TransportFeedbackAdapterObserver
+  void OnPacketAdded(uint32_t ssrc,
+                     uint16_t transport_sequence_number) override;
+  void OnTransportFeedback(const rtcp::TransportFeedback& feedback) override;
+
   const webrtc::AudioSendStream::Config& config() const;
   void SetTransportOverhead(int transport_overhead_per_packet);
 
@@ -78,6 +86,10 @@ class AudioSendStream final : public webrtc::AudioSendStream,
   BitrateAllocator* const bitrate_allocator_;
   CongestionController* const congestion_controller_;
 
+  rtc::CriticalSection packets_sent_since_last_feedback_cs_;
+  std::vector<uint16_t> packets_sent_since_last_feedback_
+      GUARDED_BY(&packets_sent_since_last_feedback_cs_);
+
   RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(AudioSendStream);
 };
 }  // namespace internal