From 675fe349a77c4b0842b97a097bca28bb793814af Mon Sep 17 00:00:00 2001
From: Guillaume Desmottes <guillaume.desmottes@onestream.live>
Date: Fri, 15 Oct 2021 17:00:20 +0200
Subject: [PATCH] gstreamer: implement Sum on ClockTime

Small convenient helper.
---
 gstreamer/src/clock_time.rs | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/gstreamer/src/clock_time.rs b/gstreamer/src/clock_time.rs
index 0d7c18f33..dab740212 100644
--- a/gstreamer/src/clock_time.rs
+++ b/gstreamer/src/clock_time.rs
@@ -455,6 +455,13 @@ impl crate::utils::Displayable for ClockTime {
     }
 }
 
+impl std::iter::Sum for ClockTime {
+    fn sum<I: Iterator<Item = Self>>(iter: I) -> Self {
+        skip_assert_initialized!();
+        iter.fold(ClockTime::ZERO, |a, b| a + b)
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;
@@ -815,4 +822,12 @@ mod tests {
         assert_eq!(format!("{:026}", lots), "0005124095:34:33.709551614");
         assert_eq!(format!("{:+026}", lots), "+005124095:34:33.709551614");
     }
+
+    #[test]
+    fn iter_sum() {
+        let s: ClockTime = vec![ClockTime::from_seconds(1), ClockTime::from_seconds(2)]
+            .into_iter()
+            .sum();
+        assert_eq!(s, ClockTime::from_seconds(3));
+    }
 }