1 files changed, 4 insertions, 2 deletions
diff --git a/video/csputils.c b/video/csputils.c
index 6f88fe30b2..98c5c96c39 100644
--- a/video/csputils.c
+++ b/video/csputils.c
@@ -711,8 +711,10 @@ void mp_get_csp_matrix(struct mp_csp_params *params, struct mp_cmat *m)
     }
     case MP_CSP_XYZ: {
         // The vo should probably not be using a matrix generated by this
-        // function for XYZ sources, but if it does, let's just assume it
-        // wants BT.709 with D65 white point (virtually all other content).
+        // function for XYZ sources, but if it does, let's just convert it to
+        // an equivalent RGB space based on the colorimetry metadata it
+        // provided in mp_csp_params. (At the risk of clipping, if the
+        // chosen primaries are too small to fit the actual data)
         mp_get_xyz2rgb_coeffs(params, MP_INTENT_RELATIVE_COLORIMETRIC, m);
         levels_in = -1;
         break;