python SDK

vocode/output_device/base_output_device.py

@@ -0,0 +1,15 @@
+from ..models.audio_encoding import AudioEncoding
+
+class BaseOutputDevice:
+
+    def __init__(self, sampling_rate: int, audio_encoding: AudioEncoding):
+        self.sampling_rate = sampling_rate
+        self.audio_encoding = audio_encoding
+
+    async def send_async(self, chunk):
+        raise NotImplemented
+
+    async def maybe_send_mark_async(self, message):
+        pass
+
+

vocode/output_device/speaker_output.py

@@ -0,0 +1,28 @@
+import pyaudio
+
+from .base_output_device import BaseOutputDevice
+from ..models.audio_encoding import AudioEncoding
+
+class SpeakerOutput(BaseOutputDevice):
+
+    DEFAULT_SAMPLING_RATE = 44100
+
+    def __init__(self, pa: pyaudio.PyAudio, device_info: dict, audio_encoding: AudioEncoding = AudioEncoding.LINEAR16):
+        self.device_info = device_info
+        sampling_rate = int(self.device_info.get('defaultSampleRate', self.DEFAULT_SAMPLING_RATE))
+        super().__init__(sampling_rate, audio_encoding)
+        self.pa = pa
+        self.stream = self.pa.open(
+            output=True,
+            channels=1,
+            rate=self.sampling_rate,
+            format=pyaudio.paInt16,
+            output_device_index=int(self.device_info['index'])
+        )
+
+    async def send_async(self, chunk):
+        self.stream.write(chunk)
+
+    def terminate(self):
+        self.stream.close()
+        self.pa.close()