EncodingHelper hwaccel pipelines refactor

separate the HW pipeline according to HWA method for maintainability.

MediaBrowser.Model/Configuration/EncodingOptions.cs

@@ -16,9 +16,6 @@ namespace MediaBrowser.Model.Configuration
             // This is a DRM device that is almost guaranteed to be there on every intel platform,
             // plus it's the default one in ffmpeg if you don't specify anything
             VaapiDevice = "/dev/dri/renderD128";
-            // This is the OpenCL device that is used for tonemapping.
-            // The left side of the dot is the platform number, and the right side is the device number on the platform.
-            OpenclDevice = "0.0";
             EnableTonemapping = false;
             EnableVppTonemapping = false;
             TonemappingAlgorithm = "hable";
@@ -34,6 +31,9 @@ namespace MediaBrowser.Model.Configuration
             EnableDecodingColorDepth10Hevc = true;
             EnableDecodingColorDepth10Vp9 = true;
             EnableEnhancedNvdecDecoder = true;
+            PreferSystemNativeHwDecoder = true;
+            EnableIntelLowPowerH264HwEncoder = false;
+            EnableIntelLowPowerHevcHwEncoder = false;
             EnableHardwareEncoding = true;
             AllowHevcEncoding = false;
             EnableSubtitleExtraction = true;
@@ -70,8 +70,6 @@ namespace MediaBrowser.Model.Configuration
 
         public string VaapiDevice { get; set; }
 
-        public string OpenclDevice { get; set; }
-
         public bool EnableTonemapping { get; set; }
 
         public bool EnableVppTonemapping { get; set; }
@@ -104,6 +102,12 @@ namespace MediaBrowser.Model.Configuration
 
         public bool EnableEnhancedNvdecDecoder { get; set; }
 
+        public bool PreferSystemNativeHwDecoder { get; set; }
+
+        public bool EnableIntelLowPowerH264HwEncoder { get; set; }
+
+        public bool EnableIntelLowPowerHevcHwEncoder { get; set; }
+
         public bool EnableHardwareEncoding { get; set; }
 
         public bool AllowHevcEncoding { get; set; }