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wyoming_satellite/webrtc.py

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+"""webrtc audio processing."""
+from typing import Final
+
+from .utils import AudioBuffer, chunk_samples
+
+
+class WebRtcAudio:
+    """Audio processing using webrtc."""
+
+    _sub_chunk_samples: Final = 160  # 10ms @ 16Khz
+    _sub_chunk_bytes: Final = _sub_chunk_samples * 2  # 16-bit
+
+    def __init__(self, auto_gain: int, noise_suppression: int) -> None:
+        from webrtc_noise_gain import AudioProcessor
+
+        self.audio_processor = AudioProcessor(auto_gain, noise_suppression)
+        self.audio_buffer = AudioBuffer(self._sub_chunk_bytes)
+
+    def __call__(self, audio_bytes: bytes) -> bytes:
+        """Process in 10ms chunks."""
+        clean_chunk = bytes()
+        for sub_chunk in chunk_samples(
+            audio_bytes, self._sub_chunk_bytes, self.audio_buffer
+        ):
+            result = self.audio_processor.Process10ms(sub_chunk)
+            clean_chunk += result.audio
+
+        return clean_chunk