From 4df7c1f1cbe0c3f79eec6be2474aead263f166c8 Mon Sep 17 00:00:00 2001
From: metamuffin <metamuffin@disroot.org>
Date: Tue, 20 Dec 2022 08:57:35 +0100
Subject: infra for compressed literal

---
 evc/src/codec/encode/mod.rs | 29 ++++++++++++++++-------------
 1 file changed, 16 insertions(+), 13 deletions(-)

(limited to 'evc/src/codec/encode')

diff --git a/evc/src/codec/encode/mod.rs b/evc/src/codec/encode/mod.rs
index 336f298..76fb481 100644
--- a/evc/src/codec/encode/mod.rs
+++ b/evc/src/codec/encode/mod.rs
@@ -30,7 +30,7 @@ pub enum EncodeMode {
     AdvancedPartial,
 }
 
-pub fn encode_block(view: View<&Frame>, prev: View<&Frame>, config: &EncodeConfig) -> Block {
+pub fn encode_block(view: View<&Frame>, prev: View<&Frame>, config: &EncodeConfig) -> (f64, Block) {
     let (diff, refblock) = if view.area() > config.max_diff_area {
         (
             f64::INFINITY,
@@ -57,10 +57,10 @@ pub fn encode_block(view: View<&Frame>, prev: View<&Frame>, config: &EncodeConfi
         (diff - irrelevance, refblock)
     };
     if diff < config.ref_thres {
-        refblock
+        (diff, refblock)
     } else {
         if view.size.x < config.min_block_size || view.size.y < config.min_block_size {
-            Block::Literal(view.pixels())
+            (0.0, Block::Literal(view.pixels()))
         } else {
             let [av, bv] =
                 unsafe { std::mem::transmute::<_, [View<&'static Frame>; 2]>(view.split()) };
@@ -69,7 +69,7 @@ pub fn encode_block(view: View<&Frame>, prev: View<&Frame>, config: &EncodeConfi
             let config = unsafe { std::mem::transmute::<_, &'static EncodeConfig>(config) };
 
             // only bother to do multithreading, when the block is big.
-            let (a, b) = if view.area() > 100 {
+            let ((ad, a), (bd, b)) = if view.area() > 100 {
                 both_par(
                     || encode_block(av, ap, config),
                     || encode_block(bv, bp, config),
@@ -79,15 +79,18 @@ pub fn encode_block(view: View<&Frame>, prev: View<&Frame>, config: &EncodeConfi
                 (encode_block(av, ap, config), encode_block(bv, bp, config))
             };
 
-            if a.is_literal() && b.is_literal() {
-                Block::Literal(view.pixels())
-            } else if Block::identical_ref(&a, &b) {
-                Block::Reference {
-                    translation: Vec2::<isize>::ZERO,
-                }
-            } else {
-                Block::Split(Box::new([a, b]))
-            }
+            (
+                ad + bd,
+                if a.is_literal() && b.is_literal() {
+                    Block::Literal(view.pixels())
+                } else if Block::identical_ref(&a, &b) {
+                    Block::Reference {
+                        translation: Vec2::<isize>::ZERO,
+                    }
+                } else {
+                    Block::Split(Box::new([a, b]))
+                },
+            )
         }
     }
 }
-- 
cgit v1.2.3-70-g09d2