update amf

Author: AkashiSN

build-ffmpeg

@@ -494,14 +494,15 @@ if command -v nvcc > /dev/null ; then
 	CONFIGURE_OPTIONS+=("--nvccflags=-gencode arch=compute_52,code=sm_52")
 fi
 
-if build "amf"; then
-	download "https://github.com/GPUOpen-LibrariesAndSDKs/AMF/archive/1.4.16.1.tar.gz" "amf-1.4.16.1.tar.gz"
-	execute mkdir -p ${WORKSPACE}/include/AMF
-	execute cp -r amf/public/include/* ${WORKSPACE}/include/AMF/
-	build_done "amf"
+if [[ "$OSTYPE" == "linux-gnu" ]]; then
+	if build "amf"; then
+		download "https://github.com/GPUOpen-LibrariesAndSDKs/AMF/archive/1.4.16.1.tar.gz" "amf-1.4.16.1.tar.gz"
+		execute mkdir -p ${WORKSPACE}/include/AMF
+		execute cp -r amf/public/include/* ${WORKSPACE}/include/AMF/
+		build_done "amf"
+	fi
+	CONFIGURE_OPTIONS+=("--enable-amf")
 fi
-CONFIGURE_OPTIONS+=("--enable-amf")
-
 
 ##
 ## FFmpeg