From 4e2c65323891bdfaedfaee50d7dd743c1884713c Mon Sep 17 00:00:00 2001
From: Thomas Spurden <thomas@spurden.name>
Date: Mon, 11 Jan 2021 19:57:59 +0000
Subject: [PATCH] Delete some now unused code in compress.py

---
 compress.py | 45 +--------------------------------------------
 1 file changed, 1 insertion(+), 44 deletions(-)

diff --git a/compress.py b/compress.py
index d8ad5e2..64fd78a 100644
--- a/compress.py
+++ b/compress.py
@@ -332,43 +332,6 @@ if __name__ == '__main__':
     line_bytes = line_bits // 8
     assert (line_bytes % 8) == 0
 
-    def find_best_encoding(lines, idx):
-        if idx < frame_height:
-            return (0, 0, 0)
-        else:
-            best_match_count = 0
-            best = None
-            idx_within_frame = idx % frame_height
-            for off_y in range(-MAX_OFFSET, MAX_OFFSET+1):
-                if idx_within_frame + off_y < 0 or idx_within_frame + off_y >= frame_height:
-                    continue
-                ref = lines[idx - frame_height + off_y]
-                for off_x in range(-MAX_OFFSET, MAX_OFFSET+1):
-                    if off_x < 0:
-                        ref_shifted = ref << abs(off_x)
-                    else:
-                        ref_shifted = ref >> off_x
-
-                    ref_shifted &= (2**line_bits) - 1
-
-                    if ref_shifted == lines[idx]:
-                        return (off_x, off_y, (2**line_bytes) - 1)
-                    match_mask = 0
-                    for i in range(line_bytes):
-                        byte_mask = 0xFF << (8 * i)
-                        if (ref_shifted & byte_mask) == (lines[idx] & byte_mask):
-                            match_mask |= (1 << i)
-                    match_count = bin(match_mask).count('1')
-
-                    if match_count >= best_match_count:
-                        best = (off_x, off_y, match_mask)
-                        best_match_count = match_count
-
-            if best_match_count >= (line_bytes // 8):
-                return best
-            else:
-                return (0, 0, 0)
-
     def lines_for(seed, unique_count, line_count):
         rng = random.Random(seed)
         lines = [rng.getrandbits(line_bits) for i in range(unique_count)]
@@ -385,10 +348,6 @@ if __name__ == '__main__':
                     v <<= abs(s)
             yield v & ((2**line_bits) - 1)
 
-    #test_lines = [
-        #sum(((0xDEAD0000 + (i % 145)) << (32 * x)) for x in range(10))
-        #for i in range(frame_height * 2)
-    #]
     if sys.argv[1] == 'test':
         def wait(valid, v):
             while (yield valid) != v:
@@ -425,12 +384,10 @@ if __name__ == '__main__':
         test_lines = list(lines_for(423, 2, 64))
 
         decomp = list(codec.decompress(codec.compress(test_lines)))
-        #for i, (comp, expected) in enumerate(zip(decomp, test_lines)):
-            #print('{:02d} {:x} {:x} {:x}'.format(i, comp, expected, comp ^ expected))
         assert decomp == test_lines
 
         for i, l in enumerate(test_lines):
-            print('{:02d} {:080x}'.format(i, l))
+            print('{:02d} {:016x}'.format(i, l))
         run_simulation(dut, [lines_in(dut, test_lines), lines_out(dut, test_lines)], vcd_name='out.vcd')
     else:
         raise ValueError(sys.argv[1])
-- 
2.45.2