codec_support: add module for generic vector quantisation

1 files changed, 23 insertions, 0 deletions

diff --git a/nihav-codec-support/src/vq/mod.rs b/nihav-codec-support/src/vq/mod.rs
new file mode 100644
index 0000000..38ab9e3
--- /dev/null
+++ b/nihav-codec-support/src/vq/mod.rs
@@ -0,0 +1,23 @@
+//! Vector quantisation routines.
+mod generic_elbg;
+mod generic_mediancut;
+
+pub trait VQElement: Sized+Copy+PartialEq {
+    fn dist(&self, rval: Self) -> u32;
+    fn min_cw() -> Self;
+    fn max_cw() -> Self;
+    fn min(&self, rval: Self) -> Self;
+    fn max(&self, rval: Self) -> Self;
+    fn num_components() -> usize;
+    fn sort_by_component(arr: &mut [Self], component: usize);
+    fn max_dist_component(min: &Self, max: &Self) -> usize;
+}
+
+pub trait VQElementSum<T: VQElement> {
+    fn zero() -> Self;
+    fn add(&mut self, rval: T, count: u64);
+    fn get_centroid(&self) -> T;
+}
+
+pub use self::generic_elbg::ELBG;
+pub use self::generic_mediancut::quantise_median_cut;