1 files changed, 4 insertions, 1 deletions
diff --git a/video/out/filter_kernels.h b/video/out/filter_kernels.h
index fc90a1cdde..74cc3eb148 100644
--- a/video/out/filter_kernels.h
+++ b/video/out/filter_kernels.h
@@ -34,7 +34,10 @@ struct filter_kernel {
     bool polar;         // whether or not the filter uses polar coordinates
     // The following values are set by mp_init_filter() at runtime.
     int size;           // number of coefficients (may depend on radius)
-    double inv_scale;   // scale factor (<1.0 is upscale, >1.0 downscale)
+    double filter_scale;  // Factor to convert the mathematical filter
+                          // function radius to the possibly wider
+                          // (in the case of downsampling) filter sample
+                          // radius.
 };
 
 extern const struct filter_window mp_filter_windows[];