From: Kostya Shishkov <kostya.shishkov@gmail.com>
Date: Fri, 3 Apr 2020 09:56:20 +0000 (+0200)
Subject: codec_support/h263: fix DC clipping function
X-Git-Url: https://git.nihav.org/?a=commitdiff_plain;h=acf6187c1717166984d7783e2b5bde26733c8b56;p=nihav.git

codec_support/h263: fix DC clipping function
---

diff --git a/nihav-codec-support/src/codecs/h263/decoder.rs b/nihav-codec-support/src/codecs/h263/decoder.rs
index 929854a..2707e76 100644
--- a/nihav-codec-support/src/codecs/h263/decoder.rs
+++ b/nihav-codec-support/src/codecs/h263/decoder.rs
@@ -141,9 +141,9 @@ pub struct H263BaseDecoder {
 
 #[inline]
 fn clip_dc(dc: i16) -> i16 {
-    if dc < 0 { 0 }
-    else if dc > 2046 { 2046 }
-    else { (dc + 1) & !1 }
+    if dc <= 0 { 0 }
+    else if dc > 2046 { 2047 }
+    else { dc | 1 }
 }
 
 #[inline]