Migrate SimliVideoService to AIService with Settings pattern

Align Simli with HeyGen/Tavus by extending AIService instead of
FrameProcessor and using a ServiceSettings dataclass. InputParams is
preserved but deprecated; its fields are promoted to direct init params.
Lifecycle handling moves to start()/stop()/cancel() methods.

src/pipecat/services/simli/video.py

@@ -8,6 +8,7 @@
 
 import asyncio
 import warnings
+from dataclasses import dataclass
 from typing import Optional
 
 import numpy as np
@@ -20,11 +21,14 @@ from pipecat.frames.frames import (
     Frame,
     InterruptionFrame,
     OutputImageRawFrame,
+    StartFrame,
     TTSAudioRawFrame,
     TTSStoppedFrame,
     UserStartedSpeakingFrame,
 )
-from pipecat.processors.frame_processor import FrameDirection, FrameProcessor, StartFrame
+from pipecat.processors.frame_processor import FrameDirection
+from pipecat.services.ai_service import AIService
+from pipecat.services.settings import ServiceSettings
 
 try:
     from av.audio.frame import AudioFrame
@@ -36,7 +40,14 @@ except ModuleNotFoundError as e:
     raise Exception(f"Missing module: {e}")
 
 
-class SimliVideoService(FrameProcessor):
+@dataclass
+class SimliVideoSettings(ServiceSettings):
+    """Settings for the Simli video service."""
+
+    pass
+
+
+class SimliVideoService(AIService):
     """Simli video service for real-time avatar generation.
 
     Provides real-time avatar video generation by processing audio frames
@@ -44,9 +55,15 @@ class SimliVideoService(FrameProcessor):
     audio resampling, video frame processing, and connection management.
     """
 
+    Settings = SimliVideoSettings
+    _settings: Settings
+
     class InputParams(BaseModel):
         """Input parameters for Simli video configuration.
 
+        .. deprecated:: 0.0.105
+            Use ``SimliVideoService.Settings(...)`` instead.
+
         Parameters:
             enable_logging: Whether to enable Simli logging.
             max_session_length: Absolute maximum session duration in seconds.
@@ -66,10 +83,13 @@ class SimliVideoService(FrameProcessor):
         face_id: Optional[str] = None,
         simli_config: Optional[SimliConfig] = None,
         use_turn_server: bool = False,
-        latency_interval: int = 0,
         simli_url: str = "https://api.simli.ai",
         is_trinity_avatar: bool = False,
         params: Optional[InputParams] = None,
+        max_session_length: Optional[int] = None,
+        max_idle_time: Optional[int] = None,
+        enable_logging: Optional[bool] = None,
+        settings: Optional[Settings] = None,
         **kwargs,
     ):
         """Initialize the Simli video service.
@@ -90,18 +110,42 @@ class SimliVideoService(FrameProcessor):
                 .. deprecated:: 0.0.95
                     The 'use_turn_server' parameter is deprecated and will be removed in a future version.
 
-            latency_interval: Latency interval setting for sending health checks to check
-                the latency to Simli Servers. Defaults to 0.
             simli_url: URL of the simli servers. Can be changed for custom deployments
                 of enterprise users.
             is_trinity_avatar: Boolean to tell simli client that this is a Trinity avatar
                 which reduces latency when using Trinity.
             params: Additional input parameters for session configuration.
-            **kwargs: Additional arguments passed to the parent FrameProcessor.
-        """
-        super().__init__(**kwargs)
 
-        params = params or SimliVideoService.InputParams()
+                .. deprecated:: 0.0.105
+                    Use ``settings=SimliVideoService.Settings(...)`` instead.
+
+            max_session_length: Absolute maximum session duration in seconds.
+                Avatar will disconnect after this time even if it's speaking.
+            max_idle_time: Maximum duration in seconds the avatar is not speaking
+                before the avatar disconnects.
+            enable_logging: Whether to enable Simli logging.
+            settings: Service settings.
+            **kwargs: Additional arguments passed to the parent AIService.
+        """
+        # 1. Default settings
+        default_settings = ServiceSettings(model=None)
+
+        # 2. Apply deprecated params overrides
+        if params is not None:
+            self._warn_init_param_moved_to_settings("params")
+            if max_session_length is None and hasattr(params, "max_session_length"):
+                max_session_length = params.max_session_length
+            if max_idle_time is None and hasattr(params, "max_idle_time"):
+                max_idle_time = params.max_idle_time
+            if enable_logging is None and hasattr(params, "enable_logging"):
+                enable_logging = params.enable_logging
+
+        # 3. Apply settings delta
+        if settings is not None:
+            default_settings.apply_update(settings)
+
+        # 4. Call super
+        super().__init__(settings=default_settings, **kwargs)
 
         # Handle deprecated simli_config parameter
         if simli_config is not None:
@@ -133,10 +177,10 @@ class SimliVideoService(FrameProcessor):
             config_kwargs = {
                 "faceId": face_id,
             }
-            if params.max_session_length is not None:
-                config_kwargs["maxSessionLength"] = params.max_session_length
-            if params.max_idle_time is not None:
-                config_kwargs["maxIdleTime"] = params.max_idle_time
+            if max_session_length is not None:
+                config_kwargs["maxSessionLength"] = max_session_length
+            if max_idle_time is not None:
+                config_kwargs["maxIdleTime"] = max_idle_time
 
             config = SimliConfig(**config_kwargs)
 
@@ -168,6 +212,33 @@ class SimliVideoService(FrameProcessor):
         self._previously_interrupted = is_trinity_avatar
         self._audio_buffer = bytearray()
 
+    async def start(self, frame: StartFrame):
+        """Start the Simli video service.
+
+        Args:
+            frame: The start frame containing initialization parameters.
+        """
+        await super().start(frame)
+        await self._start_connection()
+
+    async def stop(self, frame: EndFrame):
+        """Stop the Simli video service.
+
+        Args:
+            frame: The end frame.
+        """
+        await super().stop(frame)
+        await self._stop_connection()
+
+    async def cancel(self, frame: CancelFrame):
+        """Cancel the Simli video service.
+
+        Args:
+            frame: The cancel frame.
+        """
+        await super().cancel(frame)
+        await self._stop_connection()
+
     async def _start_connection(self):
         """Start the connection to Simli service and begin processing tasks."""
         try:
@@ -222,9 +293,7 @@ class SimliVideoService(FrameProcessor):
             direction: The direction of frame processing.
         """
         await super().process_frame(frame, direction)
-        if isinstance(frame, StartFrame):
-            await self._start_connection()
-        elif isinstance(frame, TTSAudioRawFrame):
+        if isinstance(frame, TTSAudioRawFrame):
             # Send audio frame to Simli
             try:
                 old_frame = AudioFrame.from_ndarray(
@@ -268,8 +337,6 @@ class SimliVideoService(FrameProcessor):
             except Exception as e:
                 await self.push_error(error_msg=f"Error stopping TTS: {e}", exception=e)
             return
-        elif isinstance(frame, (EndFrame, CancelFrame)):
-            await self._stop()
         elif isinstance(frame, (InterruptionFrame, UserStartedSpeakingFrame)):
             if not self._previously_interrupted:
                 await self._simli_client.clearBuffer()
@@ -277,7 +344,7 @@ class SimliVideoService(FrameProcessor):
 
         await self.push_frame(frame, direction)
 
-    async def _stop(self):
+    async def _stop_connection(self):
         """Stop the Simli client and cancel processing tasks."""
         await self._simli_client.stop()
         if self._audio_task: