From 730b8427b5f40e5f62bca15c5109f50db5c10be5 Mon Sep 17 00:00:00 2001
From: "Brad Payne (Vir Linden)" <vir@lindenlab.com>
Date: Tue, 9 Nov 2021 20:25:25 +0000
Subject: SL-16329 - track frame time and jitter (as average deviation frame to
 frame) in stats window

---
 indra/llcommon/lltracerecording.h | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

(limited to 'indra/llcommon/lltracerecording.h')

diff --git a/indra/llcommon/lltracerecording.h b/indra/llcommon/lltracerecording.h
index 6715104613..1f3d37336a 100644
--- a/indra/llcommon/lltracerecording.h
+++ b/indra/llcommon/lltracerecording.h
@@ -599,6 +599,35 @@ namespace LLTrace
 			return typename RelatedTypes<T>::fractional_t(getPeriodMeanPerSec(static_cast<const StatType<CountAccumulator>&>(stat), num_periods));
 		}
 
+        F64 getPeriodMedian( const StatType<SampleAccumulator>& stat, S32 num_periods = S32_MAX);
+
+        template <typename T>
+        typename RelatedTypes<typename T::value_t>::fractional_t getPeriodMedianPerSec(const StatType<T>& stat, S32 num_periods = S32_MAX)
+        {
+            LL_PROFILE_ZONE_SCOPED;
+            num_periods = llmin(num_periods, getNumRecordedPeriods());
+
+            std::vector <typename RelatedTypes<typename T::value_t>::fractional_t> buf;
+            for (S32 i = 1; i <= num_periods; i++)
+            {
+                Recording& recording = getPrevRecording(i);
+                if (recording.getDuration() > (F32Seconds)0.f)
+                {
+                    buf.push_back(recording.getPerSec(stat));
+                }
+            }
+            std::sort(buf.begin(), buf.end());
+
+            return typename RelatedTypes<T>::fractional_t((buf.size() % 2 == 0) ? (buf[buf.size() / 2 - 1] + buf[buf.size() / 2]) / 2 : buf[buf.size() / 2]);
+        }
+
+        template<typename T>
+        typename RelatedTypes<T>::fractional_t getPeriodMedianPerSec(const CountStatHandle<T>& stat, S32 num_periods = S32_MAX)
+        {
+            LL_PROFILE_ZONE_SCOPED;
+            return typename RelatedTypes<T>::fractional_t(getPeriodMedianPerSec(static_cast<const StatType<CountAccumulator>&>(stat), num_periods));
+        }
+
 		//
 		// PERIODIC STANDARD DEVIATION
 		//
-- 
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