core/scale: fix flipping of packed 16- and 32-bit images

diff --git a/nihav-core/src/scale/mod.rs b/nihav-core/src/scale/mod.rs
index 2192b187dfe14c1054baff8c412c1fb5889ea7af..f93b9d25afc32e574aa6e69bcaa8e7d7f2515c51 100644 (file)
--- a/nihav-core/src/scale/mod.rs
+++ b/nihav-core/src/scale/mod.rs
@@ -320,7 +320,7 @@ pub fn flip_picture(pic: &mut NABufferType) -> ScaleResult<()> {
             }
         },
         NABufferType::Video16(ref mut vb) => {
-            let ncomp = vb.get_num_components();
+            let ncomp = vb.get_num_components().max(1);
             for comp in 0..ncomp {
                 let off    = vb.get_offset(comp);
                 let stride = vb.get_stride(comp);
@@ -332,7 +332,7 @@ pub fn flip_picture(pic: &mut NABufferType) -> ScaleResult<()> {
             }
         },
         NABufferType::Video32(ref mut vb) => {
-            let ncomp = vb.get_num_components();
+            let ncomp = vb.get_num_components().max(1);
             for comp in 0..ncomp {
                 let off    = vb.get_offset(comp);
                 let stride = vb.get_stride(comp);