vision(moondream): process VisionImageRawFrame

CHANGELOG.md

@@ -167,6 +167,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Changed
 
+- Updated `MoondreamService` to process `VisionImageRawFrame`.
+
+- `VisionService` expects `VisionImageRawFrame` in order to analyze images.
+
 - `DailyTransport` triggers `on_error` event if transcription can't be started
   or stopped.
 

src/pipecat/services/moondream/vision.py

@@ -11,15 +11,12 @@ for image analysis and description generation.
 """
 
 import asyncio
-import base64
-from io import BytesIO
 from typing import AsyncGenerator, Optional
 
 from loguru import logger
 from PIL import Image
 
-from pipecat.frames.frames import ErrorFrame, Frame, TextFrame
+from pipecat.frames.frames import ErrorFrame, Frame, TextFrame, VisionImageRawFrame
-from pipecat.processors.aggregators.llm_context import LLMContext
 from pipecat.services.vision_service import VisionService
 
 try:
@@ -92,16 +89,16 @@ class MoondreamService(VisionService):
             trust_remote_code=True,
             revision=revision,
             device_map={"": device},
-            torch_dtype=dtype,
+            dtype=dtype,
         ).eval()
 
         logger.debug("Loaded Moondream model")
 
-    async def run_vision(self, context: LLMContext) -> AsyncGenerator[Frame, None]:
+    async def run_vision(self, frame: VisionImageRawFrame) -> AsyncGenerator[Frame, None]:
         """Analyze an image and generate a description.
 
         Args:
-            context: The context to process, containing image data.
+            frame: The vision image frame to process.
 
         Yields:
             Frame: TextFrame containing the generated image description, or ErrorFrame
@@ -112,45 +109,14 @@ class MoondreamService(VisionService):
             yield ErrorFrame("Moondream model not available")
             return
 
-        image_bytes = None
+        logger.debug(f"Analyzing image (bytes length: {len(frame.image)})")
-        text = None
-        try:
-            messages = context.get_messages()
-            last_message = messages[-1]
-            last_message_content = last_message.get("content")
 
-            for item in last_message_content:
+        def get_image_description(image_bytes: bytes, text: Optional[str]) -> str:
-                if isinstance(item, dict):
+            image = Image.frombytes(frame.format, frame.size, image_bytes)
-                    if (
-                        "image_url" in item
-                        and isinstance(item["image_url"], dict)
-                        and item["image_url"].get("url")
-                    ):
-                        image_bytes = base64.b64decode(item["image_url"]["url"].split(",")[1])
-                    elif "text" in item and isinstance(item["text"], str):
-                        text = item["text"]
-
-        except Exception as e:
-            logger.error(f"Exception during image extraction: {e}")
-            yield ErrorFrame("Failed to extract image from context")
-            return
-
-        if not image_bytes:
-            logger.error("No image found in context")
-            yield ErrorFrame("No image found in context")
-            return
-
-        logger.debug(
-            f"Analyzing image (bytes length: {len(image_bytes) if image_bytes else 'None'})"
-        )
-
-        def get_image_description(bytes: bytes, text: Optional[str]) -> str:
-            image_buffer = BytesIO(bytes)
-            image = Image.open(image_buffer)
             image_embeds = self._model.encode_image(image)
             description = self._model.query(image_embeds, text)["answer"]
             return description
 
-        description = await asyncio.to_thread(get_image_description, image_bytes, text)
+        description = await asyncio.to_thread(get_image_description, frame.image, frame.text)
 
         yield TextFrame(text=description)

src/pipecat/services/vision_service.py

@@ -14,8 +14,7 @@ visual content.
 from abc import abstractmethod
 from typing import AsyncGenerator
 
-from pipecat.frames.frames import Frame, LLMContextFrame
+from pipecat.frames.frames import Frame, VisionImageRawFrame
-from pipecat.processors.aggregators.llm_context import LLMContext
 from pipecat.processors.frame_processor import FrameDirection
 from pipecat.services.ai_service import AIService
 
@@ -38,15 +37,15 @@ class VisionService(AIService):
         self._describe_text = None
 
     @abstractmethod
-    async def run_vision(self, context: LLMContext) -> AsyncGenerator[Frame, None]:
+    async def run_vision(self, frame: VisionImageRawFrame) -> AsyncGenerator[Frame, None]:
-        """Process the latest image in the context and generate results.
+        """Process the given vision image and generate results.
 
         This method must be implemented by subclasses to provide actual computer
         vision functionality such as image description, object detection, or
         visual question answering.
 
         Args:
-            context: The context to process, containing image data.
+            frame: The vision image frame to process.
 
         Yields:
             Frame: Frames containing the vision analysis results, typically TextFrame
@@ -66,9 +65,9 @@ class VisionService(AIService):
         """
         await super().process_frame(frame, direction)
 
-        if isinstance(frame, LLMContextFrame):
+        if isinstance(frame, VisionImageRawFrame):
             await self.start_processing_metrics()
-            await self.process_generator(self.run_vision(frame.context))
+            await self.process_generator(self.run_vision(frame))
             await self.stop_processing_metrics()
         else:
             await self.push_frame(frame, direction)