From: Kostya Shishkov <kostya.shishkov@gmail.com>
Date: Tue, 12 Oct 2021 13:41:59 +0000 (+0200)
Subject: codec_support/codecs: add negation for MV
X-Git-Url: https://git.nihav.org/?p=nihav.git;a=commitdiff_plain;h=473c2f76c1164db245d9de89034650be998d4d7d

codec_support/codecs: add negation for MV
---

diff --git a/nihav-codec-support/src/codecs/mod.rs b/nihav-codec-support/src/codecs/mod.rs
index 389821e..92dee91 100644
--- a/nihav-codec-support/src/codecs/mod.rs
+++ b/nihav-codec-support/src/codecs/mod.rs
@@ -1,6 +1,6 @@
 //! Decoder support functions and definitions.
 use std::fmt;
-use std::ops::{Add, AddAssign, Sub, SubAssign};
+use std::ops::{Add, AddAssign, Sub, SubAssign, Neg};
 
 pub use nihav_core::frame::*;
 use std::mem;
@@ -288,6 +288,13 @@ impl SubAssign for MV {
     fn sub_assign(&mut self, other: MV) { self.x -= other.x; self.y -= other.y; }
 }
 
+impl Neg for MV {
+    type Output = MV;
+    fn neg(self) -> Self::Output {
+        MV { x: -self.x, y: -self.y }
+    }
+}
+
 impl fmt::Display for MV {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         write!(f, "{},{}", self.x, self.y)