Func to Expr

blurry.cpp

@@ -223,18 +223,20 @@ Func read_from_i420(Func in_y, Func in_u, Func in_v, const char *name) {
  Func vf = Func("v_float");
  vf(x, y) = cast<float>((in_v(x / 2, y / 2) & 0xff) - float128);
 
- Func r = Func("r");
- Func g = Func("g");
- Func b = Func("b");
- r(x, y) = yf(x, y) + (1.370705f * vf(x, y));
- g(x, y) = yf(x, y) - ((0.698001f * vf(x, y)) - (0.71414f * uf(x, y)));
- b(x, y) = yf(x, y) + (1.732446f * uf(x, y));
-
  Func f = Func(name);
+
+ Expr r = yf(x, y) + (1.370705f * vf(x, y));
+ Expr g = yf(x, y) - ((0.698001f * vf(x, y)) - (0.71414f * uf(x, y)));
+ Expr b = yf(x, y) + (1.732446f * uf(x, y));
+
+ Expr rr = clamp(r, float0, float255);
+ Expr gg = clamp(g, float0, float255);
+ Expr bb = clamp(b, float0, float255);
+
  Expr v = select(
- ch == 0, clamp(r(x, y), float0, float255), // R
- ch == 1, clamp(g(x, y), float0, float255), // G
- ch == 2, clamp(b(x, y), float0, float255), // B
+ ch == 0, r,  // R
+ ch == 1, g,  // G
+ ch == 2, b,  // B
  likely(float255) // A always 0xff
  );
  f(x, y, ch) = cast<uint8_t>(v);