remove pipeline because it is just a vad integration

core/__init__.py

@@ -2,7 +2,6 @@
 
 from core.events import EventBus, get_event_bus
 from core.transports import BaseTransport, SocketTransport, WebRtcTransport
-from core.pipeline import AudioPipeline
 from core.session import Session
 from core.conversation import ConversationManager, ConversationState, ConversationTurn
 from core.duplex_pipeline import DuplexPipeline
@@ -13,7 +12,6 @@ __all__ = [
     "BaseTransport",
     "SocketTransport",
     "WebRtcTransport",
-    "AudioPipeline",
     "Session",
     "ConversationManager",
     "ConversationState",

core/pipeline.py

@@ -1,131 +0,0 @@
-"""Audio processing pipeline."""
-
-import asyncio
-from typing import Optional
-from loguru import logger
-
-from core.transports import BaseTransport
-from core.events import EventBus, get_event_bus
-from processors.vad import VADProcessor, SileroVAD
-from app.config import settings
-
-
-class AudioPipeline:
-    """
-    Audio processing pipeline.
-
-    Processes incoming audio through VAD and emits events.
-    """
-
-    def __init__(self, transport: BaseTransport, session_id: str):
-        """
-        Initialize audio pipeline.
-
-        Args:
-            transport: Transport instance for sending events/audio
-            session_id: Session identifier for event tracking
-        """
-        self.transport = transport
-        self.session_id = session_id
-        self.event_bus = get_event_bus()
-
-        # Initialize VAD
-        self.vad_model = SileroVAD(
-            model_path=settings.vad_model_path,
-            sample_rate=settings.sample_rate
-        )
-        self.vad_processor = VADProcessor(
-            vad_model=self.vad_model,
-            threshold=settings.vad_threshold,
-            silence_threshold_ms=settings.vad_eou_threshold_ms,
-            min_speech_duration_ms=settings.vad_min_speech_duration_ms
-        )
-
-        # State
-        self.is_bot_speaking = False
-        self.interrupt_signal = asyncio.Event()
-        self._running = True
-
-        logger.info(f"Audio pipeline initialized for session {session_id}")
-
-    async def process_input(self, pcm_bytes: bytes) -> None:
-        """
-        Process incoming audio chunk.
-
-        Args:
-            pcm_bytes: PCM audio data (16-bit, mono, 16kHz)
-        """
-        if not self._running:
-            return
-
-        try:
-            # Process through VAD
-            result = self.vad_processor.process(pcm_bytes, settings.chunk_size_ms)
-
-            if result:
-                event_type, probability = result
-
-                # Emit event through event bus
-                await self.event_bus.publish(event_type, {
-                    "trackId": self.session_id,
-                    "probability": probability
-                })
-
-                # Send event to client
-                if event_type == "speaking":
-                    logger.info(f"User speaking started (session {self.session_id})")
-                    await self.transport.send_event({
-                        "event": "speaking",
-                        "trackId": self.session_id,
-                        "timestamp": self._get_timestamp_ms(),
-                        "startTime": self._get_timestamp_ms()
-                    })
-
-                elif event_type == "silence":
-                    logger.info(f"User speaking stopped (session {self.session_id})")
-                    await self.transport.send_event({
-                        "event": "silence",
-                        "trackId": self.session_id,
-                        "timestamp": self._get_timestamp_ms(),
-                        "startTime": self._get_timestamp_ms(),
-                        "duration": 0  # TODO: Calculate actual duration
-                    })
-
-                elif event_type == "eou":
-                    logger.info(f"EOU detected (session {self.session_id})")
-                    await self.transport.send_event({
-                        "event": "eou",
-                        "trackId": self.session_id,
-                        "timestamp": self._get_timestamp_ms()
-                    })
-
-        except Exception as e:
-            logger.error(f"Pipeline processing error: {e}", exc_info=True)
-
-    async def process_text_input(self, text: str) -> None:
-        """
-        Process text input (chat command).
-
-        Args:
-            text: Text input
-        """
-        logger.info(f"Processing text input: {text[:50]}...")
-        # TODO: Implement text processing (LLM integration, etc.)
-        # For now, just log it
-
-    async def interrupt(self) -> None:
-        """Interrupt current audio playback."""
-        if self.is_bot_speaking:
-            self.interrupt_signal.set()
-            logger.info(f"Pipeline interrupted for session {self.session_id}")
-
-    async def cleanup(self) -> None:
-        """Cleanup pipeline resources."""
-        logger.info(f"Cleaning up pipeline for session {self.session_id}")
-        self._running = False
-        self.interrupt_signal.set()
-
-    def _get_timestamp_ms(self) -> int:
-        """Get current timestamp in milliseconds."""
-        import time
-        return int(time.time() * 1000)

core/session.py

@@ -6,7 +6,7 @@ from typing import Optional, Dict, Any
 from loguru import logger
 
 from core.transports import BaseTransport
-from core.pipeline import AudioPipeline
+from core.duplex_pipeline import DuplexPipeline
 from models.commands import parse_command, TTSCommand, ChatCommand, InterruptCommand, HangupCommand
 from app.config import settings
 
@@ -16,7 +16,7 @@ class Session:
     Manages a single call session.
 
     Handles command routing, audio processing, and session lifecycle.
-    Supports both basic audio pipeline and full duplex voice conversation.
+    Uses full duplex voice conversation pipeline.
     """
 
     def __init__(self, session_id: str, transport: BaseTransport, use_duplex: bool = None):
@@ -30,20 +30,14 @@ class Session:
         """
         self.id = session_id
         self.transport = transport
-        
-        # Determine pipeline mode
         self.use_duplex = use_duplex if use_duplex is not None else settings.duplex_enabled
 
-        if self.use_duplex:
-            from core.duplex_pipeline import DuplexPipeline
-            self.pipeline = DuplexPipeline(
-                transport=transport,
-                session_id=session_id,
-                system_prompt=settings.duplex_system_prompt,
-                greeting=settings.duplex_greeting
-            )
-        else:
-            self.pipeline = AudioPipeline(transport, session_id)
+        self.pipeline = DuplexPipeline(
+            transport=transport,
+            session_id=session_id,
+            system_prompt=settings.duplex_system_prompt,
+            greeting=settings.duplex_greeting
+        )
 
         # Session state
         self.created_at = None
@@ -129,10 +123,7 @@ class Session:
             audio_bytes: PCM audio data
         """
         try:
-            if self.use_duplex:
-                await self.pipeline.process_audio(audio_bytes)
-            else:
-                await self.pipeline.process_input(audio_bytes)
+            await self.pipeline.process_audio(audio_bytes)
         except Exception as e:
             logger.error(f"Session {self.id} handle_audio error: {e}", exc_info=True)
 
@@ -148,8 +139,8 @@ class Session:
             "timestamp": self._get_timestamp_ms()
         })
 
-        # Start duplex pipeline if enabled
-        if self.use_duplex and not self._pipeline_started:
+        # Start duplex pipeline
+        if not self._pipeline_started:
             try:
                 await self.pipeline.start()
                 self._pipeline_started = True
@@ -228,10 +219,7 @@ class Session:
             logger.info(f"Session {self.id} graceful interrupt")
         else:
             logger.info(f"Session {self.id} immediate interrupt")
-            if self.use_duplex:
-                await self.pipeline.interrupt()
-            else:
-                await self.pipeline.interrupt()
+            await self.pipeline.interrupt()
 
     async def _handle_pause(self) -> None:
         """Handle pause command."""
@@ -267,11 +255,7 @@ class Session:
     async def _handle_chat(self, command: ChatCommand) -> None:
         """Handle chat command."""
         logger.info(f"Session {self.id} chat: {command.text[:50]}...")
-        # Process text input through pipeline
-        if self.use_duplex:
-            await self.pipeline.process_text(command.text)
-        else:
-            await self.pipeline.process_text_input(command.text)
+        await self.pipeline.process_text(command.text)
 
     async def _send_error(self, sender: str, error_message: str) -> None:
         """