libopus: 1.1.5 -> 1.2

> http://opus-codec.org/release/stable/2017/06/20/libopus-1_2.html

Changes since 1.1.x include:

- Speech quality improvements especially in the 12-20 kbit/s range
- Improved VBR encoding for hybrid mode
- More aggressive use of wider speech bandwidth, including fullband speech starting at 14 kbit/s
- Music quality improvements in the 32-48 kb/s range
- Generic and SSE CELT optimizations
- Support for directly encoding packets up to 120 ms
- DTX support for CELT mode
- SILK CBR improvements
- Support for all of the fixes in draft-ietf-codec-opus-update-06 (the mono downmix and the folding fixes need --enable-update-draft)
- Many bug fixes, including integer wrap-arounds discovered through fuzzing (no security implications)

pkgs/development/libraries/libopus/default.nix

@@ -2,14 +2,14 @@
 , fixedPoint ? false, withCustomModes ? true }:
 
 let
-  version = "1.1.5";
+  version = "1.2";
 in
 stdenv.mkDerivation rec {
   name = "libopus-${version}";
 
   src = fetchurl {
-    url = "http://downloads.xiph.org/releases/opus/opus-${version}.tar.gz";
-    sha256 = "1r33nm7b052dw7gsc99809df1zmj5icfiljqbrfkw2pll0f9i17b";
+    url = "https://archive.mozilla.org/pub/opus/opus-${version}.tar.gz";
+    sha256 = "1ad9q2g9vivx409jdsslv1hrh5r616qz2pjm96y8ymsigfl4bnvp";
   };
 
   outputs = [ "out" "dev" ];