4 files changed, 89 insertions, 70 deletions
diff --git a/evc/src/bin/encode.rs b/evc/src/bin/encode.rs
index 8d37443..0edc3a1 100644
--- a/evc/src/bin/encode.rs
+++ b/evc/src/bin/encode.rs
@@ -1,7 +1,8 @@
 use clap::Parser;
 use evc::{
     block::{Block, BlockInner},
-    frame::{Frame, View},
+    frame::Frame,
+    view::View,
 };
 use std::io::{self, BufReader};
 
@@ -40,12 +41,18 @@ fn main() -> io::Result<()> {
 fn encode_block(view: View, prev: View) -> Block {
     let diff = View::diff(&view, &prev);
 
-    let inner = if diff > 100_000.0 {
-        let [a, b] = view.split();
-        let [ap, bp] = prev.split();
-        BlockInner::Split(Box::new([encode_block(a, ap), encode_block(b, bp)]))
+    let inner = if diff < 10_000.0 {
+        BlockInner::Reference {
+            translation: (0, 0),
+        }
     } else {
-        todo!()
+        if view.size.0 < 32 {
+            BlockInner::Literal(view.pixels())
+        } else {
+            let [a, b] = view.split();
+            let [ap, bp] = prev.split();
+            BlockInner::Split(Box::new([encode_block(a, ap), encode_block(b, bp)]))
+        }
     };
 
     Block {
diff --git a/evc/src/frame.rs b/evc/src/frame.rs
index 1906555..6e565b6 100644
--- a/evc/src/frame.rs
+++ b/evc/src/frame.rs
@@ -1,4 +1,4 @@
-use crate::{pixel::Pixel, ser::Source};
+use crate::{pixel::Pixel, ser::Source, view::View};
 use std::{
     io,
     ops::{Index, IndexMut},
@@ -46,66 +46,3 @@ impl IndexMut<(usize, usize)> for Frame {
         &mut self.buffer[x][y]
     }
 }
-
-pub struct View<'a> {
-    pub frame: &'a Frame,
-    pub offset: (usize, usize),
-    pub size: (usize, usize),
-}
-
-impl<'a> View<'a> {
-    pub fn new(frame: &'a Frame, offset: (usize, usize), size: (usize, usize)) -> Self {
-        Self {
-            frame,
-            offset,
-            size,
-        }
-    }
-    pub fn diff(va: &Self, vb: &Self) -> f64 {
-        assert_eq!(va.size, vb.size);
-        let mut acc = 0.0;
-        for x in 0..va.size.0 {
-            for y in 0..va.size.1 {
-                let a = va[(x, y)];
-                let b = vb[(x, y)];
-                acc += Pixel::distance(a, b);
-            }
-        }
-        acc
-    }
-    pub fn split(&self) -> [Self; 2] {
-        let vert = self.size.0 > self.size.1;
-        [
-            Self {
-                frame: self.frame,
-                offset: self.offset,
-                size: if vert {
-                    (self.size.0 / 2, self.size.1)
-                } else {
-                    (self.size.0, self.size.1 / 2)
-                },
-            },
-            Self {
-                frame: self.frame,
-                offset: if vert {
-                    (self.offset.0 + self.size.0 / 2, self.offset.1)
-                } else {
-                    (self.offset.0, self.offset.1 + self.size.1 / 2)
-                },
-                size: if vert {
-                    (self.size.0 - self.size.0 / 2, self.size.1)
-                } else {
-                    (self.size.0, self.size.1 - self.size.1 / 2)
-                },
-            },
-        ]
-    }
-}
-
-impl Index<(usize, usize)> for View<'_> {
-    type Output = Pixel;
-    #[inline]
-    fn index(&self, (x, y): (usize, usize)) -> &Self::Output {
-        &self.frame[(x + self.offset.0, y + self.offset.1)]
-    }
-}
diff --git a/evc/src/lib.rs b/evc/src/lib.rs
index 26255d7..4c504ef 100644
--- a/evc/src/lib.rs
+++ b/evc/src/lib.rs
@@ -5,3 +5,4 @@ pub mod block;
 pub mod header;
 pub mod frame;
 pub mod pixel;
+pub mod view;
diff --git a/evc/src/view.rs b/evc/src/view.rs
new file mode 100644
index 0000000..ae7012f
--- /dev/null
+++ b/evc/src/view.rs
@@ -0,0 +1,74 @@
+use crate::{frame::Frame, pixel::Pixel};
+use std::ops::Index;
+
+pub struct View<'a> {
+    pub frame: &'a Frame,
+    pub offset: (usize, usize),
+    pub size: (usize, usize),
+}
+
+impl<'a> View<'a> {
+    pub fn new(frame: &'a Frame, offset: (usize, usize), size: (usize, usize)) -> Self {
+        Self {
+            frame,
+            offset,
+            size,
+        }
+    }
+    pub fn diff(va: &Self, vb: &Self) -> f64 {
+        assert_eq!(va.size, vb.size);
+        let mut acc = 0.0;
+        for x in 0..va.size.0 {
+            for y in 0..va.size.1 {
+                let a = va[(x, y)];
+                let b = vb[(x, y)];
+                acc += Pixel::distance(a, b);
+            }
+        }
+        acc
+    }
+    pub fn split(&self) -> [Self; 2] {
+        let vert = self.size.0 > self.size.1;
+        [
+            Self {
+                frame: self.frame,
+                offset: self.offset,
+                size: if vert {
+                    (self.size.0 / 2, self.size.1)
+                } else {
+                    (self.size.0, self.size.1 / 2)
+                },
+            },
+            Self {
+                frame: self.frame,
+                offset: if vert {
+                    (self.offset.0 + self.size.0 / 2, self.offset.1)
+                } else {
+                    (self.offset.0, self.offset.1 + self.size.1 / 2)
+                },
+                size: if vert {
+                    (self.size.0 - self.size.0 / 2, self.size.1)
+                } else {
+                    (self.size.0, self.size.1 - self.size.1 / 2)
+                },
+            },
+        ]
+    }
+    pub fn pixels(&self) -> Vec<Pixel> {
+        let mut v = vec![];
+        for x in 0..self.size.0 {
+            for y in 0..self.size.1 {
+                v.push(self[(x, y)]);
+            }
+        }
+        v
+    }
+}
+
+impl Index<(usize, usize)> for View<'_> {
+    type Output = Pixel;
+    #[inline]
+    fn index(&self, (x, y): (usize, usize)) -> &Self::Output {
+        &self.frame[(x + self.offset.0, y + self.offset.1)]
+    }
+}