old dir

1 files changed, 34 insertions, 0 deletions

diff --git a/old/evc/src/codec/decode.rs b/old/evc/src/codec/decode.rs
new file mode 100644
index 0000000..c042278
--- /dev/null
+++ b/old/evc/src/codec/decode.rs
@@ -0,0 +1,34 @@
+use super::compress::lit_decompress;
+use crate::{block::Block, frame::Frame, refsampler::Sampler, view::View};
+
+pub struct DecodeConfig {}
+
+pub fn decode_block(
+    block: &Block,
+    mut target: View<&mut Frame>,
+    prev: View<&Frame>,
+    config: &DecodeConfig,
+) {
+    match &block {
+        Block::Literal(pixels) => target.set_pixels(pixels),
+        Block::Split(box [a, b]) => {
+            let [a, b] = unsafe { std::mem::transmute::<_, [&'static Block; 2]>([a, b]) };
+            let [at, bt] = unsafe {
+                std::mem::transmute::<_, [View<&'static mut Frame>; 2]>(target.split_mut_unsafe())
+            };
+            let [ap, bp] =
+                unsafe { std::mem::transmute::<_, [View<&'static Frame>; 2]>(prev.split()) };
+            let config = unsafe { std::mem::transmute::<_, &'static DecodeConfig>(config) };
+
+            rayon::join(
+                move || decode_block(a, at, ap, config),
+                move || decode_block(b, bt, bp, config),
+            );
+        }
+        Block::CompressedLiteral(data) => {
+            lit_decompress(&data, target);
+        }
+        Block::Reference { translation } => target.copy_from(&prev.offset(*translation)),
+        Block::AdvancedReference(r) => target.copy_from_sampler(&Sampler::from_refblock(prev, r)),
+    }
+}