Integrate eou and vad

app/config.py

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+"""Configuration management using Pydantic settings."""
+
+from typing import List, Optional
+from pydantic import Field
+from pydantic_settings import BaseSettings, SettingsConfigDict
+import json
+
+
+class Settings(BaseSettings):
+    """Application settings loaded from environment variables."""
+
+    model_config = SettingsConfigDict(
+        env_file=".env",
+        env_file_encoding="utf-8",
+        case_sensitive=False,
+        extra="ignore"
+    )
+
+    # Server Configuration
+    host: str = Field(default="0.0.0.0", description="Server host address")
+    port: int = Field(default=8000, description="Server port")
+    external_ip: Optional[str] = Field(default=None, description="External IP for NAT traversal")
+
+    # Audio Configuration
+    sample_rate: int = Field(default=16000, description="Audio sample rate in Hz")
+    chunk_size_ms: int = Field(default=20, description="Audio chunk duration in milliseconds")
+    default_codec: str = Field(default="pcm", description="Default audio codec")
+
+    # VAD Configuration
+    vad_type: str = Field(default="silero", description="VAD algorithm type")
+    vad_model_path: str = Field(default="data/vad/silero_vad.onnx", description="Path to VAD model")
+    vad_threshold: float = Field(default=0.5, description="VAD detection threshold")
+    vad_min_speech_duration_ms: int = Field(default=250, description="Minimum speech duration in milliseconds")
+    vad_eou_threshold_ms: int = Field(default=400, description="End of utterance (silence) threshold in milliseconds")
+
+    # Logging
+    log_level: str = Field(default="INFO", description="Logging level")
+    log_format: str = Field(default="json", description="Log format (json or text)")
+
+    # CORS
+    cors_origins: str = Field(
+        default='["http://localhost:3000", "http://localhost:8080"]',
+        description="CORS allowed origins"
+    )
+
+    # ICE Servers (WebRTC)
+    ice_servers: str = Field(
+        default='[{"urls": "stun:stun.l.google.com:19302"}]',
+        description="ICE servers configuration"
+    )
+
+    @property
+    def chunk_size_bytes(self) -> int:
+        """Calculate chunk size in bytes based on sample rate and duration."""
+        # 16-bit (2 bytes) per sample, mono channel
+        return int(self.sample_rate * 2 * (self.chunk_size_ms / 1000.0))
+
+    @property
+    def cors_origins_list(self) -> List[str]:
+        """Parse CORS origins from JSON string."""
+        try:
+            return json.loads(self.cors_origins)
+        except json.JSONDecodeError:
+            return ["http://localhost:3000", "http://localhost:8080"]
+
+    @property
+    def ice_servers_list(self) -> List[dict]:
+        """Parse ICE servers from JSON string."""
+        try:
+            return json.loads(self.ice_servers)
+        except json.JSONDecodeError:
+            return [{"urls": "stun:stun.l.google.com:19302"}]
+
+
+# Global settings instance
+settings = Settings()
+
+
+def get_settings() -> Settings:
+    """Get application settings instance."""
+    return settings