X-Git-Url: https://git.nihav.org/?p=nihav.git;a=blobdiff_plain;f=nihav-core%2Fsrc%2Fscale%2Fmod.rs;h=cc2388e364ab9f7190f5e4aa34f760abe3a05740;hp=caf489bb63a4188651b838c54720cb995684fd45;hb=5f031d75f99167db3aca5e0bb25c06c487deb236;hpb=4a521cd81b96d7bc2b40144b16497fbc47f16177

diff --git a/nihav-core/src/scale/mod.rs b/nihav-core/src/scale/mod.rs
index caf489b..cc2388e 100644
--- a/nihav-core/src/scale/mod.rs
+++ b/nihav-core/src/scale/mod.rs
@@ -250,13 +250,22 @@ fn is_better_fmt(a: &ScaleInfo, b: &ScaleInfo) -> bool {
     }
     false
 }
+fn fmt_needs_scale(ifmt: &NAPixelFormaton, ofmt: &NAPixelFormaton) -> bool {
+    for (ichr, ochr) in ifmt.comp_info.iter().zip(ofmt.comp_info.iter()) {
+        if let (Some(ic), Some(oc)) = (ichr, ochr) {
+            if ic.h_ss != oc.h_ss || ic.v_ss != oc.v_ss {
+                return true;
+            }
+        }
+    }
+    false
+}
 fn build_pipeline(ifmt: &ScaleInfo, ofmt: &ScaleInfo, just_convert: bool) -> ScaleResult<Option<Stage>> {
     let inname  = ifmt.fmt.get_model().get_short_name();
     let outname = ofmt.fmt.get_model().get_short_name();
 
 println!("convert {} -> {}", ifmt, ofmt);
-    let needs_scale = if (ofmt.fmt.get_max_subsampling() > 0) &&
-        (ofmt.fmt.get_max_subsampling() != ifmt.fmt.get_max_subsampling()) {
+    let needs_scale = if fmt_needs_scale(&ifmt.fmt, &ofmt.fmt) {
             true
         } else {
             !just_convert