improve vaapi driver health check (#2047)

* improve vaapi driver health check

* fix duplicate check

* cleanup again

CHANGELOG.md

@@ -32,6 +32,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Add environment variable `ETV_DISABLE_VULKAN`
   - Any non-empty value will disable use of Vulkan acceleration and force software tonemapping
   - This may be needed with misbehaving NVIDIA drivers on Windows
+- Add health check error when invalid VAAPI device and VAAPI driver combination is used in an active ffmpeg profile
+  - This makes it obvious when hardware acceleration will not work as configured
 
 ### Changed
 - Start to make UI minimally responsive (functional on smaller screens)

ErsatzTV.FFmpeg/Capabilities/VaapiHardwareCapabilities.cs

@@ -15,6 +15,8 @@ public class VaapiHardwareCapabilities : IHardwareCapabilities
         _logger = logger;
     }
 
+    public int EntrypointCount => _profileEntrypoints.Count;
+
     public FFmpegCapability CanDecode(
         string videoFormat,
         Option<string> videoProfile,

ErsatzTV.Infrastructure/Health/Checks/VaapiDriverHealthCheck.cs

@@ -1,35 +1,81 @@
-using ErsatzTV.Core.Domain;
+using System.Collections.Immutable;
+using ErsatzTV.Core.Domain;
 using ErsatzTV.Core.FFmpeg;
 using ErsatzTV.Core.Health;
 using ErsatzTV.Core.Health.Checks;
+using ErsatzTV.FFmpeg;
+using ErsatzTV.FFmpeg.Capabilities;
 using ErsatzTV.Infrastructure.Data;
+using ErsatzTV.Infrastructure.Extensions;
 using Microsoft.EntityFrameworkCore;
 
 namespace ErsatzTV.Infrastructure.Health.Checks;
 
-public class VaapiDriverHealthCheck : BaseHealthCheck, IVaapiDriverHealthCheck
+public class VaapiDriverHealthCheck(
+    IHardwareCapabilitiesFactory hardwareCapabilitiesFactory,
+    IDbContextFactory<TvContext> dbContextFactory)
+    : BaseHealthCheck, IVaapiDriverHealthCheck
 {
-    private readonly IDbContextFactory<TvContext> _dbContextFactory;
-
-    public VaapiDriverHealthCheck(IDbContextFactory<TvContext> dbContextFactory) =>
-        _dbContextFactory = dbContextFactory;
-
     public override string Title => "VAAPI Driver";
 
     public async Task<HealthCheckResult> Check(CancellationToken cancellationToken)
     {
-        await using TvContext dbContext = await _dbContextFactory.CreateDbContextAsync(cancellationToken);
-        List<FFmpegProfile> profiles = await dbContext.FFmpegProfiles
-            .Filter(p => p.HardwareAcceleration == HardwareAccelerationKind.Vaapi)
+        await using TvContext dbContext = await dbContextFactory.CreateDbContextAsync(cancellationToken);
+
+        List<Channel> channels = await dbContext.Channels
+            .AsNoTracking()
+            .ToListAsync(cancellationToken);
+
+        var channelFFmpegProfiles = channels
+            .Map(c => c.FFmpegProfileId)
+            .ToImmutableHashSet();
+
+        List<FFmpegProfile> ffmpegProfiles = await dbContext.FFmpegProfiles
+            .AsNoTracking()
+            .Include(p => p.Resolution)
             .ToListAsync(cancellationToken);
 
-        if (profiles.Count == 0)
+        var activeFFmpegProfiles = ffmpegProfiles
+            .Filter(f => channelFFmpegProfiles.Contains(f.Id))
+            .ToList();
+
+        if (activeFFmpegProfiles.Count == 0)
         {
             return NotApplicableResult();
         }
 
+        Option<string> maybeFFmpegPath = await dbContext.ConfigElements.GetValue<string>(ConfigElementKey.FFmpegPath);
+        if (maybeFFmpegPath.IsNone)
+        {
+            return NotApplicableResult();
+        }
+
+        foreach (string ffmpegPath in maybeFFmpegPath)
+        {
+            IFFmpegCapabilities ffmpegCapabilities = await hardwareCapabilitiesFactory.GetFFmpegCapabilities(ffmpegPath);
+            foreach (FFmpegProfile profile in activeFFmpegProfiles)
+            {
+                Option<string> vaapiDriver = VaapiDriverName(profile.VaapiDriver);
 
-        var defaultProfiles = profiles
+                IHardwareCapabilities capabilities = await hardwareCapabilitiesFactory.GetHardwareCapabilities(
+                    ffmpegCapabilities,
+                    ffmpegPath,
+                    HardwareAccelerationMode.Vaapi,
+                    profile.VaapiDisplay,
+                    vaapiDriver,
+                    profile.VaapiDevice
+                );
+
+                if (capabilities is VaapiHardwareCapabilities { EntrypointCount: 0 } or NoHardwareCapabilities)
+                {
+                    return FailResult(
+                        $"FFmpeg Profile {profile.Name} is using device and driver combination ({profile.VaapiDevice} and {profile.VaapiDriver}) that reports no capabilities. Hardware Acceleration WILL NOT WORK as configured.");
+                }
+            }
+        }
+
+
+        var defaultProfiles = activeFFmpegProfiles
             .Filter(p => p.VaapiDriver == VaapiDriver.Default)
             .ToList();
 
@@ -38,4 +84,14 @@ public class VaapiDriverHealthCheck : BaseHealthCheck, IVaapiDriverHealthCheck
                 $"{defaultProfiles.Count} FFmpeg Profile{(defaultProfiles.Count > 1 ? "s are" : " is")} set to use Default VAAPI Driver; selecting iHD (Gen 8+) or i965 (up to Gen 9) may offer better performance with Intel iGPU")
             : OkResult();
     }
+
+    private static Option<string> VaapiDriverName(VaapiDriver driver) =>
+        driver switch
+        {
+            VaapiDriver.i965 => "i965",
+            VaapiDriver.iHD => "iHD",
+            VaapiDriver.RadeonSI => "radeonsi",
+            VaapiDriver.Nouveau => "nouveau",
+            _ => Option<string>.None
+        };
 }