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| # SPDX-FileCopyrightText: Copyright (c) 2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved. | |
| # SPDX-License-Identifier: Apache-2.0 | |
| # | |
| # Licensed under the Apache License, Version 2.0 (the "License"); | |
| # you may not use this file except in compliance with the License. | |
| # You may obtain a copy of the License at | |
| # | |
| # http://www.apache.org/licenses/LICENSE-2.0 | |
| # | |
| # Unless required by applicable law or agreed to in writing, software | |
| # distributed under the License is distributed on an "AS IS" BASIS, | |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| # See the License for the specific language governing permissions and | |
| # limitations under the License. | |
| from typing import Any, Tuple | |
| import numpy as np | |
| from cosmos_predict1.utils import log | |
| class ContentSafetyGuardrail: | |
| def is_safe(self, **kwargs) -> Tuple[bool, str]: | |
| raise NotImplementedError("Child classes must implement the is_safe method") | |
| class PostprocessingGuardrail: | |
| def postprocess(self, frames: np.ndarray) -> np.ndarray: | |
| raise NotImplementedError("Child classes must implement the postprocess method") | |
| class GuardrailRunner: | |
| def __init__( | |
| self, | |
| safety_models: list[ContentSafetyGuardrail] | None = None, | |
| generic_block_msg: str = "", | |
| generic_safe_msg: str = "", | |
| postprocessors: list[PostprocessingGuardrail] | None = None, | |
| ): | |
| self.safety_models = safety_models | |
| self.generic_block_msg = generic_block_msg | |
| self.generic_safe_msg = generic_safe_msg if generic_safe_msg else "Prompt is safe" | |
| self.postprocessors = postprocessors | |
| def run_safety_check(self, input: Any) -> Tuple[bool, str]: | |
| """Run the safety check on the input.""" | |
| if not self.safety_models: | |
| log.warning("No safety models found, returning safe") | |
| return True, self.generic_safe_msg | |
| for guardrail in self.safety_models: | |
| guardrail_name = str(guardrail.__class__.__name__).upper() | |
| log.debug(f"Running guardrail: {guardrail_name}") | |
| safe, message = guardrail.is_safe(input) | |
| if not safe: | |
| reasoning = self.generic_block_msg if self.generic_block_msg else f"{guardrail_name}: {message}" | |
| return False, reasoning | |
| return True, self.generic_safe_msg | |
| def postprocess(self, frames: np.ndarray) -> np.ndarray: | |
| """Run the postprocessing on the video frames.""" | |
| if not self.postprocessors: | |
| log.warning("No postprocessors found, returning original frames") | |
| return frames | |
| for guardrail in self.postprocessors: | |
| guardrail_name = str(guardrail.__class__.__name__).upper() | |
| log.debug(f"Running guardrail: {guardrail_name}") | |
| frames = guardrail.postprocess(frames) | |
| return frames | |