Add sender controlled playout delay limits

webrtc/video_frame.h

Index: webrtc/video_frame.h
diff --git a/webrtc/video_frame.h b/webrtc/video_frame.h
index 4dc3411e98ac2d218077d552d6ceb4cc52f28444..f12e6a42648475a1aabd8b80e3ac5965d09d526d 100644
--- a/webrtc/video_frame.h
+++ b/webrtc/video_frame.h
@@ -179,6 +179,19 @@ class EncodedImage {
   bool _completeFrame = false;
   AdaptReason adapt_reason_;
   int qp_ = -1;  // Quantizer value.
+  // Minimum and maximum playout delay values from capture to render.
+  // These are beset effort values.
+  //
+  // A value < 0 indicates on indicates no change from previous
+  // valid value.
+  //
+  // min = max = 0 indicates that the receiver should try and render
+  // frame as soon as possible.
+  //
+  // min = x, max = y indicates that the receiver is free to adapt
+  // in the range (x, y) based on network jitter.
+  int min_playout_delay_ms = -1;
+  int max_playout_delay_ms = -1;
 };
 
 }  // namespace webrtc