Commit 1b447c0b2d for ffmpeg

commit 1b447c0b2d875f5bfec9b748e96d09e930a21cfa
Author: Niklas Haas <git@haasn.dev>
Date:   Sun Nov 8 03:34:44 2026 +0100

    swscale/filters: move up caculation of ratio/stretch_inv

    And avoid a double reciprocal for stretch_inv.

    Signed-off-by: Niklas Haas <git@haasn.dev>

diff --git a/libswscale/filters.c b/libswscale/filters.c
index 8a5cf53cad..006cad5f83 100644
--- a/libswscale/filters.c
+++ b/libswscale/filters.c
@@ -216,10 +216,12 @@ int ff_sws_filter_generate(void *log, const SwsFilterParams *params,
         virtual_size = params->dst_size;

     const double ratio = virtual_size / params->src_size;
-    double stretch = 1.0;
+    const double ratio_inv = 1.0 / ratio;
+    double stretch = 1.0, stretch_inv = 1.0;
     if (ratio < 1.0 && scaler != SWS_SCALE_POINT) {
         /* Widen filter for downscaling (anti-aliasing) */
         stretch = 1.0 / ratio;
+        stretch_inv = ratio;
     }

     if (scaler == SWS_SCALE_AREA) {
@@ -308,7 +310,6 @@ int ff_sws_filter_generate(void *log, const SwsFilterParams *params,
         return AVERROR(ENOMEM);
     }

-    const double ratio_inv = 1.0 / ratio, stretch_inv = 1.0 / stretch;
     for (int i = 0; i < params->dst_size; i++)
         compute_row(filter, &fun, radius, ratio_inv, stretch_inv, i, tmp);
     av_free(tmp);