add vaapi hardware acceleration

ErsatzTV.Core/Domain/HardwareAccelerationKind.cs

@@ -4,6 +4,7 @@
     {
         None = 0,
         Qsv = 1,
-        Nvenc = 2
+        Nvenc = 2,
+        Vaapi = 3
     }
 }

ErsatzTV.Core/FFmpeg/FFmpegProcessBuilder.cs

@@ -66,6 +66,14 @@ namespace ErsatzTV.Core.FFmpeg
                     _arguments.Add("-hwaccel_output_format");
                     _arguments.Add("cuda");
                     break;
+                case HardwareAccelerationKind.Vaapi:
+                    _arguments.Add("-hwaccel");
+                    _arguments.Add("vaapi");
+                    _arguments.Add("-vaapi_device");
+                    _arguments.Add("/dev/dri/renderD128");
+                    _arguments.Add("-hwaccel_output_format");
+                    _arguments.Add("vaapi");
+                    break;
             }
 
             return this;
@@ -291,6 +299,8 @@ namespace ErsatzTV.Core.FFmpeg
                 {
                     HardwareAccelerationKind.Qsv => $"scale_qsv=w={displaySize.Width}:h={displaySize.Height}",
                     HardwareAccelerationKind.Nvenc => $"scale_cuda={displaySize.Width}:{displaySize.Height}",
+                    HardwareAccelerationKind.Vaapi =>
+                        $"hwupload,scale_vaapi=w={displaySize.Width}:h={displaySize.Height}:format=nv12",
                     _ => $"scale={displaySize.Width}:{displaySize.Height}:flags={algorithm}"
                 });
 

ErsatzTV.sln.DotSettings

@@ -39,4 +39,5 @@
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=probesize/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=setsar/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=tvshow/@EntryIndexedValue">True</s:Boolean>
+	<s:Boolean x:Key="/Default/UserDictionary/Words/=Vaapi/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=yadif/@EntryIndexedValue">True</s:Boolean></wpf:ResourceDictionary>

ErsatzTV/Validators/FFmpegProfileEditViewModelValidator.cs

@@ -9,6 +9,7 @@ namespace ErsatzTV.Validators
     {
         private static readonly List<string> QsvEncoders = new() { "h264_qsv", "hevc_qsv", "mpeg2_qsv" };
         private static readonly List<string> NvencEncoders = new() { "h264_nvenc", "hevc_nvenc" };
+        private static readonly List<string> VaapiEncoders = new() { "h264_vaapi", "hevc_vaapi", "mpeg2_vaapi" };
 
         public FFmpegProfileEditViewModelValidator()
         {
@@ -47,6 +48,14 @@ namespace ErsatzTV.Validators
                     RuleFor(x => x.NormalizeResolution).Must(x => x == false)
                         .WithMessage("Resolution normalization (scaling) is not yet supported with NVENC");
                 });
+            
+            When(
+                x => x.HardwareAcceleration == HardwareAccelerationKind.Vaapi,
+                () =>
+                {
+                    RuleFor(x => x.VideoCodec).Must(c => VaapiEncoders.Contains(c))
+                        .WithMessage("VAAPI codec is required (h264_vaapi, hevc_vaapi, mpeg2_vaapi)");
+                });
 
             When(
                 x => x.HardwareAcceleration == HardwareAccelerationKind.None,