Initial release

engine/plugins/schedulers/linear.lua

@@ -0,0 +1,31 @@
+-- linear.lua: Linear (uniform) scheduler — the ACE-Step default
+
+scheduler = {
+    name        = "linear",
+    display     = "Linear",
+    description = "Uniform spacing (default)",
+}
+
+function schedule(output, num_steps, shift)
+    for i = 0, num_steps - 1 do
+        output[i] = 1.0 - i / num_steps
+    end
+    apply_shift(output, num_steps, shift)
+end
+
+-- Standard shift warp: t' = shift*t / (1 + (shift-1)*t)
+function apply_shift(ts, n, shift)
+    if shift == 1.0 then return end
+    for i = 0, n - 1 do
+        local t = ts[i]
+        ts[i] = shift * t / (1.0 + (shift - 1.0) * t)
+    end
+end
+
+-- Clamp to [1e-6, 1.0]
+function clamp(ts, n)
+    for i = 0, n - 1 do
+        if ts[i] < 1e-6 then ts[i] = 1e-6 end
+        if ts[i] > 1.0 then ts[i] = 1.0 end
+    end
+end