feat: add multimodal hasher to TRT-LLM (#5715)

components/src/dynamo/trtllm/multimodal/__init__.py

+# SPDX-FileCopyrightText: Copyright (c) 2025-2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0
+
+from .hasher import MultimodalHasher
+
+__all__ = ["MultimodalHasher"]

components/src/dynamo/trtllm/multimodal/hasher.py

+# SPDX-FileCopyrightText: Copyright (c) 2025-2026 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.
+
+"""Simple multimodal content hasher based on raw bytes using BLAKE3."""
+
+from blake3 import blake3
+
+
+class MultimodalHasher:
+    """Hashes multimodal content (images, videos, etc.) based on raw bytes.
+
+    Fast and deterministic - no decoding overhead. Uses BLAKE3 for cryptographic
+    hashing of raw file bytes.
+
+    Note: Different file formats of the same visual content will produce different
+    hashes. This is by design - the hasher operates on raw bytes, not semantic content.
+    """
+
+    @staticmethod
+    def hash_bytes(data: bytes) -> str:
+        """Hash raw bytes using BLAKE3.
+
+        Args:
+            data: Raw bytes to hash
+
+        Returns:
+            Hex digest string (64 characters for BLAKE3)
+
+        Example:
+            >>> hasher = MultimodalHasher()
+            >>> hash_result = hasher.hash_bytes(b"hello world")
+            >>> isinstance(hash_result, str)
+            True
+            >>> len(hash_result)
+            64
+        """
+        return blake3(data).hexdigest()