[bink] keep guest decode path

docs/bink2-bridge.md

@@ -14,9 +14,9 @@ available, presents its decoded BGRA frames at the normal guest-flip boundary.
 This preserves the game's own timing and lets the host Vulkan presenter display
 the movie without trying to execute the PS5-specific Bink GPU decode path.
 
-Without an adapter, Bink movies are skipped by default: their open call returns
-not-found so games that mark cinematics as optional progress to their next
-state instead of waiting on an empty Bink GPU texture.
+Without an adapter, Bink files remain visible to the guest and the game's
+statically linked decoder runs normally. Set SHARPEMU_BINK_MODE=skip only when
+explicitly testing a title whose cinematics are optional.
 
 Set SHARPEMU_BINK_MODE=dummy to retain the open and show a built-in,
 non-decoded placeholder frame. This requires no SDK, but is a visual diagnostic

src/SharpEmu.Libs/Bink/Bink2MovieBridge.cs

@@ -29,10 +29,9 @@ internal static class Bink2MovieBridge
     private static bool _availabilityReported;
 
     /// <summary>
-    /// Returns true when the guest should receive a normal "file not found"
-    /// result for a Bink movie. This is the safe default without a decoder:
-    /// games that treat movies as optional fall through to their next state
-    /// rather than submitting an empty Bink GPU texture forever.
+    /// Returns true only when movie skipping was explicitly requested. Without
+    /// a host adapter the guest must be allowed to run the Bink implementation
+    /// statically linked into its executable.
     /// </summary>
     internal static bool ShouldSkipGuestMovie(string hostPath) =>
         hostPath.EndsWith(".bk2", StringComparison.OrdinalIgnoreCase) &&
@@ -53,12 +52,18 @@ internal static class Bink2MovieBridge
                 return;
             }
 
-            if (ResolveMode() == MovieMode.Dummy)
+            var mode = ResolveMode();
+            if (mode == MovieMode.Dummy)
             {
                 AttachDummyMovieLocked(hostPath);
                 return;
             }
 
+            if (mode != MovieMode.Native)
+            {
+                return;
+            }
+
             var adapter = GetAdapterLocked();
             if (adapter is null)
             {
@@ -165,16 +170,15 @@ internal static class Bink2MovieBridge
             return MovieMode.Skip;
         }
 
-        // With no SDK adapter present, returning "not found" makes optional
-        // cinematics advance. Supplying either an explicit path or the normal
-        // side-by-side adapter enables native playback automatically.
+        // Prefer the optional host adapter when one is supplied. Otherwise let
+        // the game's statically linked Bink implementation consume the file.
         if (!string.IsNullOrWhiteSpace(Environment.GetEnvironmentVariable("SHARPEMU_BINK2_BRIDGE")) ||
             EnumerateAdapterCandidates().Any(File.Exists))
         {
             return MovieMode.Native;
         }
 
-        return MovieMode.Skip;
+        return MovieMode.Guest;
     }
 
     private static void AttachDummyMovieLocked(string hostPath)
@@ -335,6 +339,7 @@ internal static class Bink2MovieBridge
 
     private enum MovieMode
     {
+        Guest,
         Skip,
         Dummy,
         Native,