some more complex sample manipulation example

bong/src/main.rs

@@ -1,6 +1,6 @@
 use bingus::{
     img::{Dimensions, RgbImage},
-    snd::{RawSamples, Sample},
+    snd::RawSamples,
     Bendable, DynamicBendable, OpenError,
 };
 use clap::Parser;
@@ -17,14 +17,9 @@ fn main() -> Result<(), OpenError> {
             width: i.width(),
             height: i.height(),
         };
-        RawSamples::from(
-            RawSamples::<u16>::bend_from(i, (), bingus::Crop::End)
+        RawSamples::<u32>::bend_from(i, (), bingus::Crop::End)
             .unwrap()
-                .as_ref()
-                .iter()
-                .map(|s| s.to_sample::<u8>().to_sample())
-                .collect::<Vec<u16>>(),
-        )
+            .map(|s| s.abs_diff(s.wrapping_neg()))
             .bend_into::<RgbImage>(dimensions, bingus::Crop::End)
             .unwrap()
             .save(args.output_file)