From 9c211e161f0f9cfb97aeb5778591563def6239fc Mon Sep 17 00:00:00 2001
From: metamuffin <metamuffin@disroot.org>
Date: Sat, 20 May 2023 14:03:12 +0200
Subject: idk

---
 bv1/codec/src/encode.rs | 44 ++++++++++++++++++++++++++++++++------------
 1 file changed, 32 insertions(+), 12 deletions(-)

(limited to 'bv1/codec/src/encode.rs')

diff --git a/bv1/codec/src/encode.rs b/bv1/codec/src/encode.rs
index 564b0b3..2f40c07 100644
--- a/bv1/codec/src/encode.rs
+++ b/bv1/codec/src/encode.rs
@@ -1,4 +1,3 @@
-use crate::diff::{diff, pixel_diff};
 use crate::huff::write_huff;
 use crate::impls::join;
 use crate::split::split;
@@ -10,7 +9,9 @@ use std::time::Instant;
 pub struct EncodeConfig {
     pub threshold: f32,
     pub max_block_size: usize,
+    pub min_block_size: usize,
     pub attention_split: u32,
+    pub motion_split_f: f32,
     pub keyframe_interval: usize,
 }
 
@@ -74,27 +75,28 @@ pub fn encode(
 
 pub fn encode_block(last_frame: &Frame, frame: &Frame, view: View, config: &EncodeConfig) -> Block {
     let view_area = view.size().area();
+    let thres = config.threshold * view_area as f32;
+
     if view_area > config.max_block_size
-        || (view_area > 64 && attention(frame, view) > config.attention_split)
+        || (view_area > config.min_block_size
+            && (total_contrast(frame, view) > config.attention_split
+                || diff([last_frame, frame], view, Ref::default())
+                    > (thres * config.motion_split_f) as u32))
     {
         let [av, bv] = split(view);
         let (ab, bb) = join(
-            || Box::new(encode_block(last_frame, frame, av, config)),
-            || Box::new(encode_block(last_frame, frame, bv, config)),
+            || encode_block(last_frame, frame, av, config),
+            || encode_block(last_frame, frame, bv, config),
         );
-        return Block::Split(ab, bb);
+        return Block::Split(box ab, box bb);
     }
 
     let mut r = Ref::default();
     let mut d = diff([last_frame, frame], view, r);
 
-    // let att = 1. - attention(frame, view) as f32 * 0.000001;
-    // let thres = (config.threshold as f32 * att.clamp(0.2, 1.0)) as u32;
-    let thres = (config.threshold * view_area as f32) as u32;
-
     let target_average = average_color(frame, view);
 
-    for granularity in [2, 1, 2, 1, 2, 1, 2, 1] {
+    for granularity in [1, 2, 3, 5, 7, 5, 3, 2, 1] {
         let (nd, nrp) = optimize_ref(last_frame, frame, view, r, granularity, target_average);
         if nd < d {
             r = nrp;
@@ -104,7 +106,7 @@ pub fn encode_block(last_frame: &Frame, frame: &Frame, view: View, config: &Enco
         }
     }
 
-    if d < thres {
+    if d < thres as u32 {
         return Block::Ref(r);
     } else {
         Block::Lit(frame.export(view))
@@ -156,7 +158,7 @@ pub fn optimize_ref(
     .unwrap()
 }
 
-pub fn attention(frame: &Frame, view: View) -> u32 {
+pub fn total_contrast(frame: &Frame, view: View) -> u32 {
     let mut k = 0;
     for y in view.a.y..view.b.y - 1 {
         for x in view.a.x..view.b.x - 1 {
@@ -188,3 +190,21 @@ pub fn average_color(frame: &Frame, view: View) -> Pixel {
         b: (b / area) as i16,
     }
 }
+
+pub fn diff([frame1, frame2]: [&Frame; 2], view: View, rp: Ref) -> u32 {
+    let mut k = 0;
+    for y in view.a.y..view.b.y {
+        for x in view.a.x..view.b.x {
+            let pos = P2 { x, y };
+            let p1 = frame1[pos + rp.pos_off] + rp.color_off;
+            let p2 = frame2[pos];
+            k += pixel_diff(p1, p2)
+        }
+    }
+    k
+}
+
+#[inline(always)]
+pub fn pixel_diff(p1: Pixel, p2: Pixel) -> u32 {
+    p1.r.abs_diff(p2.r) as u32 + p1.g.abs_diff(p2.g) as u32 + p1.b.abs_diff(p2.b) as u32
+}
-- 
cgit v1.2.3-70-g09d2