34 lines
1001 B
Python
34 lines
1001 B
Python
"""Voice activity detection."""
|
|
from typing import Optional
|
|
|
|
|
|
class SileroVad:
|
|
"""Voice activity detection with silero VAD."""
|
|
|
|
def __init__(self, threshold: float, trigger_level: int) -> None:
|
|
from pysilero_vad import SileroVoiceActivityDetector
|
|
|
|
self.detector = SileroVoiceActivityDetector()
|
|
self.threshold = threshold
|
|
self.trigger_level = trigger_level
|
|
self._activation = 0
|
|
|
|
def __call__(self, audio_bytes: Optional[bytes]) -> bool:
|
|
if audio_bytes is None:
|
|
# Reset
|
|
self._activation = 0
|
|
self.detector.reset()
|
|
return False
|
|
|
|
if self.detector(audio_bytes) >= self.threshold:
|
|
# Speech detected
|
|
self._activation += 1
|
|
if self._activation >= self.trigger_level:
|
|
self._activation = 0
|
|
return True
|
|
else:
|
|
# Silence detected
|
|
self._activation = max(0, self._activation - 1)
|
|
|
|
return False
|