diff --git a/call/syncable.h b/call/syncable.h
index a914793..067e01c 100644
--- a/call/syncable.h
+++ b/call/syncable.h
@@ -35,8 +35,11 @@
 
   virtual int id() const = 0;
   virtual absl::optional<Info> GetInfo() const = 0;
-  virtual uint32_t GetPlayoutTimestamp() const = 0;
+  virtual bool GetPlayoutRtpTimestamp(uint32_t* rtp_timestamp,
+                                      int64_t* time_ms) const = 0;
   virtual void SetMinimumPlayoutDelay(int delay_ms) = 0;
+  virtual void SetEstimatedPlayoutNtpTimestampMs(int64_t ntp_timestamp_ms,
+                                                 int64_t time_ms) = 0;
 };
 }  // namespace webrtc