| # Reference: https://github.com/comfyanonymous/ComfyUI | |
| def append_dims(x, target_dims): | |
| """Appends dimensions to the end of a tensor until it has target_dims dimensions""" | |
| dims_to_append = target_dims - x.ndim | |
| if dims_to_append < 0: | |
| raise ValueError(f"input has {x.ndim} dims but target_dims is {target_dims}, which is less") | |
| expanded = x[(...,) + (None,) * dims_to_append] | |
| # MPS will get inf values if it tries to index into the new axes, but detaching fixes this. | |
| # https://github.com/pytorch/pytorch/issues/84364 | |
| return expanded.detach().clone() if expanded.device.type == "mps" else expanded | |