Merge branch 'main' into pydantic_v2_migration

aana/configs/deployments.py

@@ -1,4 +1,8 @@
 from aana.deployments.hf_blip2_deployment import HFBlip2Config, HFBlip2Deployment
+from aana.deployments.stablediffusion2_deployment import (
+    StableDiffusion2Config,
+    StableDiffusion2Deployment,
+)
 from aana.deployments.vllm_deployment import VLLMConfig, VLLMDeployment
 from aana.deployments.whisper_deployment import (
     WhisperComputeType,
@@ -46,4 +50,13 @@
             compute_type=WhisperComputeType.FLOAT16,
         ).model_dump(),
     ),
+    "stablediffusion2_deployment": StableDiffusion2Deployment.options(
+        num_replicas=1,
+        max_concurrent_queries=1000,
+        ray_actor_options={"num_gpus": 1},
+        user_config=StableDiffusion2Config(
+            model="stabilityai/stable-diffusion-2",
+            dtype=Dtype.FLOAT16,
+        ).dict(),
+    ),
 }

aana/configs/endpoints.py

@@ -186,4 +186,17 @@
             ],
         ),
     ],
+    "stablediffusion2": [
+        Endpoint(
+            name="imagegen",
+            path="/generate_image",
+            summary="Generates an image from a text prompt",
+            outputs=[
+                EndpointOutput(
+                    name="image_path_stablediffusion2",
+                    output="image_path_stablediffusion2",
+                )
+            ],
+        )
+    ],
 }

aana/configs/pipeline.py

@@ -2,6 +2,7 @@
 
 It is used to generate the pipeline and the API endpoints.
 """
+import PIL.Image
 
 from aana.models.pydantic.asr_output import (
     AsrSegments,
@@ -721,6 +722,41 @@
             }
         ],
     },
+    {
+        "name": "stable-diffusion-2-imagegen",
+        "type": "ray_deployment",
+        "deployment_name": "stablediffusion2_deployment",
+        "method": "generate",
+        "inputs": [{"name": "prompt", "key": "prompt", "path": "prompt"}],
+        "outputs": [
+            {
+                "name": "image_stablediffusion2",
+                "key": "image",
+                "path": "stablediffusion2-image",
+                "data_model": PIL.Image.Image,
+            }
+        ],
+    },
+    {
+        "name": "save_image_stablediffusion2",
+        "type": "function",
+        "function": "aana.utils.image.save_image",
+        "dict_output": True,
+        "inputs": [
+            {
+                "name": "image_stablediffusion2",
+                "key": "image",
+                "path": "stablediffusion2-image",
+            },
+        ],
+        "outputs": [
+            {
+                "name": "image_path_stablediffusion2",
+                "key": "path",
+                "path": "image_path",
+            }
+        ],
+    },
     {
         "name": "save_video",
         "type": "function",

aana/deployments/stablediffusion2_deployment.py

@@ -0,0 +1,76 @@
+from typing import Any, TypedDict
+
+import PIL
+import torch
+from diffusers import EulerDiscreteScheduler, StableDiffusionPipeline
+from pydantic import BaseModel, Field
+from ray import serve
+
+from aana.deployments.base_deployment import BaseDeployment
+from aana.models.core.dtype import Dtype
+from aana.models.pydantic.prompt import Prompt
+
+
+class StableDiffusion2Output(TypedDict):
+    """Output class for the StableDiffusion2 deployment."""
+
+    image: PIL.Image.Image
+
+
+class StableDiffusion2Config(BaseModel):
+    """The configuration for the Stable Diffusion 2 deployment.
+
+    Attributes:
+        model (str): the model ID on HuggingFace
+        dtype (str): the data type (optional, default: "auto"), one of "auto", "float32", "float16"
+    """
+
+    model: str
+    dtype: Dtype = Field(default=Dtype.AUTO)
+
+
+@serve.deployment
+class StableDiffusion2Deployment(BaseDeployment):
+    """Stable Diffusion 2 deployment."""
+
+    async def apply_config(self, config: dict[str, Any]):
+        """Apply the configuration.
+
+        The method is called when the deployment is created or updated.
+
+        It loads the model and scheduler from HuggingFace.
+
+        The configuration should conform to the StableDiffusion2Confgi schema.
+        """
+        config_obj = StableDiffusion2Config(**config)
+
+        # Load the model and processor from HuggingFace
+        self.model_id = config_obj.model
+        self.dtype = config_obj.dtype
+        if self.dtype == Dtype.INT8:
+            self.torch_dtype = Dtype.FLOAT16.to_torch()
+        else:
+            self.torch_dtype = self.dtype.to_torch()
+        self.device = "cuda" if torch.cuda.is_available() else "cpu"
+        self.model = StableDiffusionPipeline.from_pretrained(
+            self.model_id,
+            torch_dtype=self.torch_dtype,
+            scheduler=EulerDiscreteScheduler.from_pretrained(
+                self.model_id, subfolder="scheduler"
+            ),
+            device_map="auto",
+        )
+
+        self.model.to(self.device)
+
+    async def generate(self, prompt: Prompt) -> StableDiffusion2Output:
+        """Runs the model on a given prompt and returns the first output.
+
+        Arguments:
+            prompt (Prompt): the prompt to the model.
+
+        Returns:
+            StableDiffusion2Output: a dictionary with one key containing the result
+        """
+        image = self.model(str(prompt)).images[0]
+        return {"image": image}

aana/models/core/file.py

@@ -0,0 +1,8 @@
+from pathlib import Path
+from typing import TypedDict
+
+
+class PathResult(TypedDict):
+    """Represents a path result describing a file on disk."""
+
+    path: Path

aana/utils/image.py

@@ -0,0 +1,23 @@
+from pathlib import Path
+from uuid import uuid4
+
+import PIL.Image
+
+from aana.configs.settings import settings
+from aana.models.core.file import PathResult
+
+
+def save_image(image: PIL.Image.Image, full_path: Path | None = None) -> PathResult:
+    """Saves an image to the given full path, or randomely generates one if no path is supplied.
+
+    Arguments:
+        image (Image): the image to save
+        full_path (Path|None): the path to save the image to. If None, will generate one randomly.
+
+    Returns:
+        PathResult: contains the path to the saved image.
+    """
+    if not full_path:
+        full_path = settings.image_dir / f"{uuid4()}.png"
+    image.save(full_path)
+    return {"path": full_path}