feat: add optional device parameter to Recorder

tests/test_recorder.py

@@ -63,3 +63,16 @@ class TestRecorder:
         assert result.shape == (16000,)
         assert result[0] == 1.0
         assert result[8000] == 0.5
+
+    def test_device_passed_to_inputstream(self):
+        recorder = Recorder(sample_rate=16000, channels=1, min_duration=0.0, device="USB Mic")
+        with patch("sounddevice.InputStream") as mock_cls:
+            mock_cls.return_value = MagicMock()
+            recorder.start()
+            call_kwargs = mock_cls.call_args.kwargs
+            assert call_kwargs["device"] == "USB Mic"
+            recorder.stop()
+
+    def test_default_device_is_none(self):
+        recorder = Recorder()
+        assert recorder.device is None

whisper_local/recorder.py

@@ -9,10 +9,17 @@ logger = logging.getLogger(__name__)
 
 
 class Recorder:
-    def __init__(self, sample_rate: int = 16000, channels: int = 1, min_duration: float = 0.5):
+    def __init__(
+        self,
+        sample_rate: int = 16000,
+        channels: int = 1,
+        min_duration: float = 0.5,
+        device: str | None = None,
+    ):
         self.sample_rate = sample_rate
         self.channels = channels
         self.min_duration = min_duration
+        self.device = device
         self.is_recording = False
         self._chunks: list[np.ndarray] = []
         self._stream: sd.InputStream | None = None
@@ -31,6 +38,7 @@ class Recorder:
             channels=self.channels,
             dtype=np.float32,
             callback=self._audio_callback,
+            device=self.device,
         )
         self._stream.start()
         logger.info("Aufnahme gestartet")