forked from genewildish/Mainline
feat(sensors): add sensor framework for pipeline integration
- Add Sensor base class with value emission - Add SensorRegistry for discovery - Add SensorStage adapter for pipeline - Add MicSensor (self-contained, no external deps) - Add OscillatorSensor for testing - Add sensor param bindings to effects
This commit is contained in:
186
engine/sensors/__init__.py
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186
engine/sensors/__init__.py
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@@ -0,0 +1,186 @@
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"""
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Sensor framework - PureData-style real-time input system.
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Sensors are data sources that emit values over time, similar to how
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PureData objects emit signals. Effects can bind to sensors to modulate
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their parameters dynamically.
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Architecture:
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- Sensor: Base class for all sensors (mic, camera, ntfy, OSC, etc.)
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- SensorRegistry: Global registry for sensor discovery
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- SensorStage: Pipeline stage wrapper for sensors
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- Effect param_bindings: Declarative sensor-to-param routing
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Example:
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class GlitchEffect(EffectPlugin):
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param_bindings = {
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"intensity": {"sensor": "mic", "transform": "linear"},
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}
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This binds the mic sensor to the glitch intensity parameter.
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"""
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from abc import ABC, abstractmethod
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from dataclasses import dataclass
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from typing import TYPE_CHECKING, Any
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if TYPE_CHECKING:
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from engine.pipeline.core import PipelineContext
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@dataclass
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class SensorValue:
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"""A sensor reading with metadata."""
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sensor_name: str
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value: float
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timestamp: float
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unit: str = ""
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class Sensor(ABC):
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"""Abstract base class for sensors.
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Sensors are real-time data sources that emit values. They can be:
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- Physical: mic, camera, joystick, MIDI, OSC
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- Virtual: ntfy, timer, random, noise
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Each sensor has a name and emits SensorValue objects.
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"""
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name: str
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unit: str = ""
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@property
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def available(self) -> bool:
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"""Whether the sensor is currently available."""
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return True
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@abstractmethod
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def read(self) -> SensorValue | None:
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"""Read current sensor value.
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Returns:
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SensorValue if available, None if sensor is not ready.
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"""
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...
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@abstractmethod
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def start(self) -> bool:
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"""Start the sensor.
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Returns:
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True if started successfully.
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"""
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...
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@abstractmethod
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def stop(self) -> None:
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"""Stop the sensor and release resources."""
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...
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class SensorRegistry:
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"""Global registry for sensors.
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Provides:
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- Registration of sensor instances
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- Lookup by name
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- Global start/stop
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"""
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_sensors: dict[str, Sensor] = {}
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_started: bool = False
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@classmethod
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def register(cls, sensor: Sensor) -> None:
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"""Register a sensor instance."""
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cls._sensors[sensor.name] = sensor
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@classmethod
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def get(cls, name: str) -> Sensor | None:
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"""Get a sensor by name."""
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return cls._sensors.get(name)
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@classmethod
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def list_sensors(cls) -> list[str]:
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"""List all registered sensor names."""
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return list(cls._sensors.keys())
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@classmethod
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def start_all(cls) -> bool:
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"""Start all sensors.
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Returns:
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True if all sensors started successfully.
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"""
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if cls._started:
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return True
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all_started = True
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for sensor in cls._sensors.values():
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if sensor.available and not sensor.start():
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all_started = False
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cls._started = all_started
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return all_started
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@classmethod
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def stop_all(cls) -> None:
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"""Stop all sensors."""
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for sensor in cls._sensors.values():
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sensor.stop()
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cls._started = False
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@classmethod
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def read_all(cls) -> dict[str, float]:
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"""Read all sensor values.
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Returns:
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Dict mapping sensor name to current value.
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"""
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result = {}
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for name, sensor in cls._sensors.items():
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value = sensor.read()
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if value:
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result[name] = value.value
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return result
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class SensorStage:
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"""Pipeline stage wrapper for sensors.
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Provides sensor data to the pipeline context.
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"""
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def __init__(self, sensor: Sensor, name: str | None = None):
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self._sensor = sensor
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self.name = name or sensor.name
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self.category = "sensor"
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self.optional = True
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@property
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def capabilities(self) -> set[str]:
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return {f"sensor.{self.name}"}
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@property
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def dependencies(self) -> set[str]:
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return set()
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def init(self, ctx: "PipelineContext") -> bool:
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return self._sensor.start()
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def process(self, data: Any, ctx: "PipelineContext") -> Any:
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value = self._sensor.read()
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if value:
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ctx.set_state(f"sensor.{self.name}", value.value)
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ctx.set_state(f"sensor.{self.name}.full", value)
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return data
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def cleanup(self) -> None:
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self._sensor.stop()
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def create_sensor_stage(sensor: Sensor, name: str | None = None) -> SensorStage:
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"""Create a pipeline stage from a sensor."""
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return SensorStage(sensor, name)
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147
engine/sensors/mic.py
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147
engine/sensors/mic.py
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@@ -0,0 +1,147 @@
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"""
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Mic sensor - audio input as a pipeline sensor.
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Self-contained implementation that handles audio input directly,
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with graceful degradation if sounddevice is unavailable.
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"""
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import atexit
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import time
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from collections.abc import Callable
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from dataclasses import dataclass
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from datetime import datetime
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from typing import Any
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try:
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import numpy as np
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import sounddevice as sd
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_HAS_AUDIO = True
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except Exception:
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_HAS_AUDIO = False
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np = None # type: ignore
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sd = None # type: ignore
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from engine.events import MicLevelEvent
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from engine.sensors import Sensor, SensorRegistry, SensorValue
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@dataclass
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class AudioConfig:
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"""Configuration for audio input."""
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threshold_db: float = 50.0
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sample_rate: float = 44100.0
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block_size: int = 1024
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class MicSensor(Sensor):
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"""Microphone sensor for pipeline integration.
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Self-contained implementation with graceful degradation.
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No external dependencies required - works with or without sounddevice.
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"""
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def __init__(self, threshold_db: float = 50.0, name: str = "mic"):
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self.name = name
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self.unit = "dB"
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self._config = AudioConfig(threshold_db=threshold_db)
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self._db: float = -99.0
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self._stream: Any = None
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self._subscribers: list[Callable[[MicLevelEvent], None]] = []
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@property
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def available(self) -> bool:
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"""Check if audio input is available."""
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return _HAS_AUDIO and self._stream is not None
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def start(self) -> bool:
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"""Start the microphone stream."""
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if not _HAS_AUDIO:
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return False
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try:
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self._stream = sd.InputStream(
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samplerate=self._config.sample_rate,
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blocksize=self._config.block_size,
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channels=1,
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callback=self._audio_callback,
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)
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self._stream.start()
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atexit.register(self.stop)
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return True
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except Exception:
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return False
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def stop(self) -> None:
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"""Stop the microphone stream."""
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if self._stream:
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try:
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self._stream.stop()
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self._stream.close()
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except Exception:
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pass
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self._stream = None
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def _audio_callback(
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self, indata: np.ndarray, frames: int, time_info: Any, status: Any
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) -> None:
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"""Process audio data from sounddevice."""
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if not _HAS_AUDIO or np is None:
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return
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rms = np.sqrt(np.mean(indata**2))
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if rms > 0:
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db = 20 * np.log10(rms)
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else:
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db = -99.0
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self._db = db
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excess = max(0.0, db - self._config.threshold_db)
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event = MicLevelEvent(
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db_level=db, excess_above_threshold=excess, timestamp=datetime.now()
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)
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self._emit(event)
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def _emit(self, event: MicLevelEvent) -> None:
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"""Emit event to all subscribers."""
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for callback in self._subscribers:
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try:
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callback(event)
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except Exception:
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pass
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def subscribe(self, callback: Callable[[MicLevelEvent], None]) -> None:
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"""Subscribe to mic level events."""
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if callback not in self._subscribers:
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self._subscribers.append(callback)
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def unsubscribe(self, callback: Callable[[MicLevelEvent], None]) -> None:
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"""Unsubscribe from mic level events."""
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if callback in self._subscribers:
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self._subscribers.remove(callback)
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def read(self) -> SensorValue | None:
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"""Read current mic level as sensor value."""
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if not self.available:
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return None
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excess = max(0.0, self._db - self._config.threshold_db)
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return SensorValue(
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sensor_name=self.name,
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value=excess,
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timestamp=time.time(),
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unit=self.unit,
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)
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def register_mic_sensor() -> None:
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"""Register the mic sensor with the global registry."""
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sensor = MicSensor()
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SensorRegistry.register(sensor)
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# Auto-register when imported
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register_mic_sensor()
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161
engine/sensors/oscillator.py
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161
engine/sensors/oscillator.py
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@@ -0,0 +1,161 @@
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"""
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Oscillator sensor - Modular synth-style oscillator as a pipeline sensor.
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Provides various waveforms that can be:
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1. Self-driving (phase accumulates over time)
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2. Sensor-driven (phase modulated by external sensor)
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Built-in waveforms:
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- sine: Pure sine wave
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- square: Square wave (0 to 1)
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- sawtooth: Rising sawtooth (0 to 1, wraps)
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- triangle: Triangle wave (0 to 1 to 0)
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- noise: Random values (0 to 1)
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Example usage:
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osc = OscillatorSensor(waveform="sine", frequency=0.5)
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# Or driven by mic sensor:
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osc = OscillatorSensor(waveform="sine", frequency=1.0, input_sensor="mic")
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"""
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import math
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import random
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import time
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from enum import Enum
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from engine.sensors import Sensor, SensorRegistry, SensorValue
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class Waveform(Enum):
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"""Built-in oscillator waveforms."""
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SINE = "sine"
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SQUARE = "square"
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SAWTOOTH = "sawtooth"
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TRIANGLE = "triangle"
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NOISE = "noise"
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class OscillatorSensor(Sensor):
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"""Oscillator sensor that generates periodic or random values.
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Can run in two modes:
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- Self-driving: phase accumulates based on frequency
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- Sensor-driven: phase modulated by external sensor value
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"""
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WAVEFORMS = {
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"sine": lambda p: (math.sin(2 * math.pi * p) + 1) / 2,
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"square": lambda p: 1.0 if (p % 1.0) < 0.5 else 0.0,
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"sawtooth": lambda p: p % 1.0,
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"triangle": lambda p: 2 * abs(2 * (p % 1.0) - 1) - 1,
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"noise": lambda _: random.random(),
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}
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def __init__(
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self,
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name: str = "osc",
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waveform: str = "sine",
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frequency: float = 1.0,
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input_sensor: str | None = None,
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input_scale: float = 1.0,
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):
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"""Initialize oscillator sensor.
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Args:
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name: Sensor name
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waveform: Waveform type (sine, square, sawtooth, triangle, noise)
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frequency: Frequency in Hz (self-driving mode)
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input_sensor: Optional sensor name to drive phase
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input_scale: Scale factor for input sensor
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"""
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self.name = name
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self.unit = ""
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self._waveform = waveform
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self._frequency = frequency
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self._input_sensor = input_sensor
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self._input_scale = input_scale
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self._phase = 0.0
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self._start_time = time.time()
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@property
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def available(self) -> bool:
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return True
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@property
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def waveform(self) -> str:
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return self._waveform
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@waveform.setter
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def waveform(self, value: str) -> None:
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if value not in self.WAVEFORMS:
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raise ValueError(f"Unknown waveform: {value}")
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self._waveform = value
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@property
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def frequency(self) -> float:
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return self._frequency
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@frequency.setter
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def frequency(self, value: float) -> None:
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self._frequency = max(0.0, value)
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def start(self) -> bool:
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self._phase = 0.0
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self._start_time = time.time()
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return True
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def stop(self) -> None:
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pass
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def _get_input_value(self) -> float:
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"""Get value from input sensor if configured."""
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if self._input_sensor:
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from engine.sensors import SensorRegistry
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sensor = SensorRegistry.get(self._input_sensor)
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if sensor:
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reading = sensor.read()
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if reading:
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return reading.value * self._input_scale
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return 0.0
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def read(self) -> SensorValue | None:
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current_time = time.time()
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elapsed = current_time - self._start_time
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if self._input_sensor:
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input_val = self._get_input_value()
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phase_increment = (self._frequency * elapsed) + input_val
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else:
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phase_increment = self._frequency * elapsed
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self._phase += phase_increment
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waveform_fn = self.WAVEFORMS.get(self._waveform)
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if waveform_fn is None:
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return None
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value = waveform_fn(self._phase)
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value = max(0.0, min(1.0, value))
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return SensorValue(
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sensor_name=self.name,
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value=value,
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timestamp=current_time,
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unit=self.unit,
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)
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def set_waveform(self, waveform: str) -> None:
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"""Change waveform at runtime."""
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self.waveform = waveform
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def set_frequency(self, frequency: float) -> None:
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"""Change frequency at runtime."""
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self.frequency = frequency
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def register_oscillator_sensor(name: str = "osc", **kwargs) -> None:
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"""Register an oscillator sensor with the global registry."""
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sensor = OscillatorSensor(name=name, **kwargs)
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SensorRegistry.register(sensor)
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Block a user