feat: drop cython monotonic_align

monotonic_align/core.py

@@ -0,0 +1,35 @@
+import numba
+
+
+@numba.jit(numba.void(numba.int32[:,:,::1], numba.float32[:,:,::1], numba.int32[::1], numba.int32[::1]), nopython=True, nogil=True)
+def maximum_path_jit(paths, values, t_ys, t_xs):
+  b = paths.shape[0]
+  max_neg_val=-1e9
+  for i in range(int(b)):
+    path = paths[i]
+    value = values[i]
+    t_y = t_ys[i]
+    t_x = t_xs[i]
+
+    v_prev = v_cur = 0.0
+    index = t_x - 1
+
+    for y in range(t_y):
+      for x in range(max(0, t_x + y - t_y), min(t_x, y + 1)):
+        if x == y:
+          v_cur = max_neg_val
+        else:
+          v_cur = value[y-1, x]
+        if x == 0:
+          if y == 0:
+            v_prev = 0.
+          else:
+            v_prev = max_neg_val
+        else:
+          v_prev = value[y-1, x-1]
+        value[y, x] += max(v_prev, v_cur)
+
+    for y in range(t_y - 1, -1, -1):
+      path[y, index] = 1
+      if index != 0 and (index == y or value[y-1, index] < value[y-1, index-1]):
+        index = index - 1