chore: add experimental MutimodalEmbeddingGenerator class (#1374)

* chore: add experimental MutimodalEmbeddingGenerator class

* fix

Author: GarrettWu

bigframes/ml/llm.py

@@ -57,6 +57,8 @@
     _TEXT_MULTILINGUAL_EMBEDDING_002_ENDPOINT,
 )
 
+_MULTIMODAL_EMBEDDING_001_ENDPOINT = "multimodalembedding@001"
+
 _GEMINI_PRO_ENDPOINT = "gemini-pro"
 _GEMINI_1P5_PRO_PREVIEW_ENDPOINT = "gemini-1.5-pro-preview-0514"
 _GEMINI_1P5_PRO_FLASH_PREVIEW_ENDPOINT = "gemini-1.5-flash-preview-0514"
@@ -762,6 +764,152 @@ def to_gbq(self, model_name: str, replace: bool = False) -> TextEmbeddingGenerat
         return new_model.session.read_gbq_model(model_name)
 
 
+@log_adapter.class_logger
+class MultimodalEmbeddingGenerator(base.RetriableRemotePredictor):
+    """Multimodal embedding generator LLM model.
+
+    .. note::
+        BigFrames Blob is still under experiments. It may not work and subject to change in the future.
+
+    Args:
+        model_name (str, Default to "multimodalembedding@001"):
+            The model for multimodal embedding. Can set to "multimodalembedding@001". Multimodal-embedding models returns model embeddings for text, image and video inputs.
+            Default to "multimodalembedding@001".
+        session (bigframes.Session or None):
+            BQ session to create the model. If None, use the global default session.
+        connection_name (str or None):
+            Connection to connect with remote service. str of the format <PROJECT_NUMBER/PROJECT_ID>.<LOCATION>.<CONNECTION_ID>.
+            If None, use default connection in session context.
+    """
+
+    def __init__(
+        self,
+        *,
+        model_name: Literal["multimodalembedding@001"] = "multimodalembedding@001",
+        session: Optional[bigframes.Session] = None,
+        connection_name: Optional[str] = None,
+    ):
+        if not bigframes.options.experiments.blob:
+            raise NotImplementedError()
+        self.model_name = model_name
+        self.session = session or global_session.get_global_session()
+        self.connection_name = connection_name
+
+        self._bqml_model_factory = globals.bqml_model_factory()
+        self._bqml_model: core.BqmlModel = self._create_bqml_model()
+
+    def _create_bqml_model(self):
+        # Parse and create connection if needed.
+        self.connection_name = self.session._create_bq_connection(
+            connection=self.connection_name, iam_role="aiplatform.user"
+        )
+
+        if self.model_name != _MULTIMODAL_EMBEDDING_001_ENDPOINT:
+            msg = _MODEL_NOT_SUPPORTED_WARNING.format(
+                model_name=self.model_name,
+                known_models=_MULTIMODAL_EMBEDDING_001_ENDPOINT,
+            )
+            warnings.warn(msg)
+
+        options = {
+            "endpoint": self.model_name,
+        }
+        return self._bqml_model_factory.create_remote_model(
+            session=self.session, connection_name=self.connection_name, options=options
+        )
+
+    @classmethod
+    def _from_bq(
+        cls, session: bigframes.Session, bq_model: bigquery.Model
+    ) -> MultimodalEmbeddingGenerator:
+        assert bq_model.model_type == "MODEL_TYPE_UNSPECIFIED"
+        assert "remoteModelInfo" in bq_model._properties
+        assert "endpoint" in bq_model._properties["remoteModelInfo"]
+        assert "connection" in bq_model._properties["remoteModelInfo"]
+
+        # Parse the remote model endpoint
+        bqml_endpoint = bq_model._properties["remoteModelInfo"]["endpoint"]
+        model_connection = bq_model._properties["remoteModelInfo"]["connection"]
+        model_endpoint = bqml_endpoint.split("/")[-1]
+
+        model = cls(
+            session=session,
+            model_name=model_endpoint,  # type: ignore
+            connection_name=model_connection,
+        )
+
+        model._bqml_model = core.BqmlModel(session, bq_model)
+        return model
+
+    @property
+    def _predict_func(
+        self,
+    ) -> Callable[
+        [bigframes.dataframe.DataFrame, Mapping], bigframes.dataframe.DataFrame
+    ]:
+        return self._bqml_model.generate_embedding
+
+    @property
+    def _status_col(self) -> str:
+        return _ML_GENERATE_EMBEDDING_STATUS
+
+    def predict(
+        self, X: utils.ArrayType, *, max_retries: int = 0
+    ) -> bigframes.dataframe.DataFrame:
+        """Predict the result from input DataFrame.
+
+        Args:
+            X (bigframes.dataframe.DataFrame or bigframes.series.Series or pandas.core.frame.DataFrame or pandas.core.series.Series):
+                Input DataFrame or Series, can contain one or more columns. If multiple columns are in the DataFrame, it must contain a "content" column for prediction.
+                The content column must be of string type or BigFrames Blob of image or video.
+
+            max_retries (int, default 0):
+                Max number of retries if the prediction for any rows failed. Each try needs to make progress (i.e. has successfully predicted rows) to continue the retry.
+                Each retry will append newly succeeded rows. When the max retries are reached, the remaining rows (the ones without successful predictions) will be appended to the end of the result.
+
+        Returns:
+            bigframes.dataframe.DataFrame: DataFrame of shape (n_samples, n_input_columns + n_prediction_columns). Returns predicted values.
+        """
+        if max_retries < 0:
+            raise ValueError(
+                f"max_retries must be larger than or equal to 0, but is {max_retries}."
+            )
+
+        (X,) = utils.batch_convert_to_dataframe(X, session=self._bqml_model.session)
+
+        if len(X.columns) == 1:
+            # BQML identified the column by name
+            col_label = cast(blocks.Label, X.columns[0])
+            X = X.rename(columns={col_label: "content"})
+
+        # TODO(garrettwu): remove transform to ObjRefRuntime when BQML supports ObjRef as input
+        if X["content"].dtype == dtypes.OBJ_REF_DTYPE:
+            X["content"] = X["content"].blob._get_runtime("R", with_metadata=True)
+
+        options = {
+            "flatten_json_output": True,
+        }
+
+        return self._predict_and_retry(X, options=options, max_retries=max_retries)
+
+    def to_gbq(
+        self, model_name: str, replace: bool = False
+    ) -> MultimodalEmbeddingGenerator:
+        """Save the model to BigQuery.
+
+        Args:
+            model_name (str):
+                The name of the model.
+            replace (bool, default False):
+                Determine whether to replace if the model already exists. Default to False.
+
+        Returns:
+            MultimodalEmbeddingGenerator: Saved model."""
+
+        new_model = self._bqml_model.copy(model_name, replace)
+        return new_model.session.read_gbq_model(model_name)
+
+
 @log_adapter.class_logger
 class GeminiTextGenerator(base.RetriableRemotePredictor):
     """Gemini text generator LLM model.

bigframes/ml/loader.py

@@ -75,6 +75,7 @@
         llm._TEXT_EMBEDDING_005_ENDPOINT: llm.TextEmbeddingGenerator,
         llm._TEXT_EMBEDDING_004_ENDPOINT: llm.TextEmbeddingGenerator,
         llm._TEXT_MULTILINGUAL_EMBEDDING_002_ENDPOINT: llm.TextEmbeddingGenerator,
+        llm._MULTIMODAL_EMBEDDING_001_ENDPOINT: llm.MultimodalEmbeddingGenerator,
     }
 )
 
@@ -98,6 +99,7 @@ def from_bq(
     llm.PaLM2TextEmbeddingGenerator,
     llm.Claude3TextGenerator,
     llm.TextEmbeddingGenerator,
+    llm.MultimodalEmbeddingGenerator,
     pipeline.Pipeline,
     compose.ColumnTransformer,
     preprocessing.PreprocessingType,

bigframes/ml/utils.py

@@ -100,6 +100,9 @@ def parse_model_endpoint(model_endpoint: str) -> tuple[str, Optional[str]]:
     model_name = model_endpoint
     version = None
 
+    if model_endpoint.startswith("multimodalembedding"):
+        return model_name, version
+
     at_idx = model_endpoint.find("@")
     if at_idx != -1:
         version = model_endpoint[at_idx + 1 :]