change how qsv is initialized on windows (#2183)

ErsatzTV.FFmpeg/Environment/CudaVisibleDevicesVariable.cs

@@ -0,0 +1,11 @@
+namespace ErsatzTV.FFmpeg.Environment;
+
+public class CudaVisibleDevicesVariable(string visibleDevices) : IPipelineStep
+{
+    public EnvironmentVariable[] EnvironmentVariables => [ new("CUDA_VISIBLE_DEVICES", visibleDevices) ];
+    public string[] GlobalOptions => [];
+    public string[] InputOptions(InputFile inputFile) => [];
+    public string[] FilterOptions => [];
+    public string[] OutputOptions => [];
+    public FrameState NextState(FrameState currentState) => currentState;
+}

ErsatzTV.FFmpeg/GlobalOption/HardwareAcceleration/QsvHardwareAccelerationOption.cs

@@ -16,9 +16,7 @@ public class QsvHardwareAccelerationOption(Option<string> device, FFmpegCapabili
     {
         get
         {
-            string[] initDevices = OperatingSystem.IsWindows()
-                ? new[] { "-init_hw_device", "d3d11va=hw:,vendor=0x8086", "-filter_hw_device", "hw" }
-                : new[] { "-init_hw_device", "qsv=hw", "-filter_hw_device", "hw" };
+            string[] initDevices = ["-init_hw_device", "qsv=hw", "-filter_hw_device", "hw"];
 
             var result = new List<string>
             {

ErsatzTV.FFmpeg/InputOption/StreamSeekInputOption.cs

@@ -15,7 +15,7 @@ public class StreamSeekInputOption : IInputOption
     public string[] OutputOptions => Array.Empty<string>();
     public FrameState NextState(FrameState currentState) => currentState;
 
-    public bool AppliesTo(AudioInputFile audioInputFile) => true;
+    public bool AppliesTo(AudioInputFile audioInputFile) => audioInputFile is not NullAudioInputFile;
 
     // don't seek into a still image
     public bool AppliesTo(VideoInputFile videoInputFile) => videoInputFile.VideoStreams.All(s => !s.StillImage);

ErsatzTV.FFmpeg/Pipeline/QsvPipelineBuilder.cs

@@ -3,6 +3,7 @@ using ErsatzTV.FFmpeg.Decoder;
 using ErsatzTV.FFmpeg.Decoder.Qsv;
 using ErsatzTV.FFmpeg.Encoder;
 using ErsatzTV.FFmpeg.Encoder.Qsv;
+using ErsatzTV.FFmpeg.Environment;
 using ErsatzTV.FFmpeg.Filter;
 using ErsatzTV.FFmpeg.Filter.Qsv;
 using ErsatzTV.FFmpeg.Format;
@@ -75,7 +76,7 @@ public class QsvPipelineBuilder : SoftwarePipelineBuilder
         }
 
         bool isHevcOrH264 = videoStream.Codec is /*VideoFormat.Hevc or*/ VideoFormat.H264;
-        bool is10Bit = videoStream.BitDepth == 10;
+        bool is10Bit = videoStream.PixelFormat.Map(pf => pf.BitDepth).IfNone(8) == 10;
 
         // 10-bit hevc/h264 qsv decoders have issues, so use software
         if (decodeCapability == FFmpegCapability.Hardware && isHevcOrH264 && is10Bit)
@@ -89,6 +90,9 @@ public class QsvPipelineBuilder : SoftwarePipelineBuilder
             decodeCapability = FFmpegCapability.Software;
         }
 
+        // give a bogus value so no cuda devices are visible to ffmpeg
+        pipelineSteps.Add(new CudaVisibleDevicesVariable("999"));
+
         pipelineSteps.Add(new QsvHardwareAccelerationOption(ffmpegState.VaapiDevice, decodeCapability));
 
         // disable hw accel if decoder/encoder isn't supported
@@ -279,8 +283,7 @@ public class QsvPipelineBuilder : SoftwarePipelineBuilder
             IPixelFormat formatForDownload = pixelFormat;
 
             bool usesVppQsv =
-                videoInputFile.FilterSteps.Any(f =>
-                    f is QsvFormatFilter or ScaleQsvFilter or DeinterlaceQsvFilter or TonemapQsvFilter);
+                videoInputFile.FilterSteps.Any(f => f is QsvFormatFilter or ScaleQsvFilter or DeinterlaceQsvFilter or TonemapQsvFilter);
 
             // if we have no filters, check whether we need to convert pixel format
             // since qsv doesn't seem to like doing that at the encoder
@@ -336,17 +339,20 @@ public class QsvPipelineBuilder : SoftwarePipelineBuilder
                 // force p010/nv12 if we're still in hardware
                 if (currentState.FrameDataLocation == FrameDataLocation.Hardware)
                 {
-                    if (currentState.BitDepth is 10 && formatForDownload is not PixelFormatYuv420P10Le)
+                    foreach (int bitDepth in currentState.PixelFormat.Map(pf => pf.BitDepth))
+                    {
+                        if (bitDepth is 10 && formatForDownload is not PixelFormatYuv420P10Le)
                         {
                             formatForDownload = new PixelFormatYuv420P10Le();
                             currentState = currentState with { PixelFormat = Some(formatForDownload) };
                         }
-                    else if (currentState.BitDepth is 8 && formatForDownload is not PixelFormatNv12)
+                        else if (bitDepth is 8 && formatForDownload is not PixelFormatNv12)
                         {
                             formatForDownload = new PixelFormatNv12(formatForDownload.Name);
                             currentState = currentState with { PixelFormat = Some(formatForDownload) };
                         }
                     }
+                }
 
                 // vpp_qsv seems to strip color info, so if we use that at all, force overriding input color info
                 var colorspace = new ColorspaceFilter(
@@ -586,8 +592,8 @@ public class QsvPipelineBuilder : SoftwarePipelineBuilder
 
         // auto_scale filter seems to muck up 10-bit software decode => hardware scale, so use software scale in that case
         useSoftwareFilter = useSoftwareFilter ||
-                            ffmpegState is { DecoderHardwareAccelerationMode: HardwareAccelerationMode.None } &&
-                            OperatingSystem.IsWindows() && currentState.BitDepth == 10;
+                            (ffmpegState is { DecoderHardwareAccelerationMode: HardwareAccelerationMode.None } &&
+                             OperatingSystem.IsWindows() && currentState.BitDepth == 10);
 
         if (currentState.ScaledSize != desiredState.ScaledSize && useSoftwareFilter)
         {