mpv: fix build on Darwin (patch by marsam)

--- a/osdep/mac/input_helper.swift

+++ b/osdep/mac/input_helper.swift

@@ -18,6 +18,14 @@

 import Cocoa

 import Carbon.HIToolbox

+extension NSCondition {

+    fileprivate func withLock<T>(_ body: () throws -> T) rethrows -> T {

+        self.lock()

+        defer { self.unlock() }

+        return try body()

+    }

+}

+

 class InputHelper: NSObject {

     var option: OptionHelper?

     var lock = NSCondition()

--- a/audio/out/ao_avfoundation.m

+++ b/audio/out/ao_avfoundation.m

@@ -312,7 +312,8 @@

+    #if __MAC_OS_X_VERSION_MAX_ALLOWED >= 120000

     p->observer = [[AVObserver alloc] initWithAO:ao];

     NSNotificationCenter *center = [NSNotificationCenter defaultCenter];

     [center addObserver:p->observer selector:@selector(handleRestartNotification:) name:AVSampleBufferAudioRendererOutputConfigurationDidChangeNotification object:p->renderer];

     [center addObserver:p->observer selector:@selector(handleRestartNotification:) name:AVSampleBufferAudioRendererWasFlushedAutomaticallyNotification object:p->renderer];

-

+    #endif

     return CONTROL_OK;

  pulseSupport ? config.pulseaudio or stdenv.isLinux,

  rubberbandSupport ? true,

  screenSaverSupport ? true,

  sdl2Support ? true,

  sdl2Support ? !stdenv.isDarwin,

  sixelSupport ? false,

  speexSupport ? true,

  swiftSupport ? stdenv.isDarwin,

    hash = "sha256-dFajnCpGlNqUv33A8eFEn8kjtzIPkcBY5j0gNVlaiIY=";

  };

  patches = [

    # Fix build with Darwin SDK 11

    ./0001-fix-darwin-build.patch

  ];

  postPatch = lib.concatStringsSep "\n" [

    # Don't reference compile time dependencies or create a build outputs cycle

    # between out and dev

      mpv is a free and open-source general-purpose video player, based on the

      MPlayer and mplayer2 projects, with great improvements above both.

    '';

    broken = stdenv.isDarwin; # Yet another SDK incompatibility...

    changelog = "https://github.com/mpv-player/mpv/releases/tag/v${finalAttrs.version}";

    license = lib.licenses.gpl2Plus;

    mainProgram = "mpv";