63 lines
2.0 KiB
Python
63 lines
2.0 KiB
Python
import pyaudio
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import logging
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import audioop
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logger = logging.getLogger("player")
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class Player:
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"""
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Play the streamed audio
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"""
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def __init__(self, src_rate, out_rate):
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self.p = None
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self.src_rate = src_rate
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self.out_rate = out_rate # unfortunately not every device plays 16kHz audio streams
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self.cv_laststate = None
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try:
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self.p = p = pyaudio.PyAudio()
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self.stream = p.open(format=pyaudio.paInt16,
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channels=1,
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rate=out_rate,
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output=True,
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output_device_index=self.get_output_idx()
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)
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except Exception as e:
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logger.critical(f"Player not instatiated: {e}")
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if self.p:
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self.p.terminate()
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self.p = None
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def get_output_idx(self):
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output_device_idx = None
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devices_count = self.p.get_device_count()
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for i in range(devices_count):
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dev = self.p.get_device_info_by_index(i)
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# print(dev)
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if output_device_idx is None and dev['maxOutputChannels'] > 0:
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output_device_idx = dev['index']
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logger.info("Use device {0}: {1} {2}".format(dev['index'],dev['name'], dev['maxOutputChannels']))
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logger.debug("{} {:0d} {}".format("* " if output_device_idx == i else "- ", i, dev['name']))
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return output_device_idx
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def receive(self, chunk):
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if not self.p:
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return
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# logger.debug('receive {}'.format(len(chunk)))
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if self.src_rate == self.out_rate:
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data = chunk
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else:
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data, self.cv_laststate = audioop.ratecv(chunk, 2, 1, self.src_rate, self.out_rate, self.cv_laststate)
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self.stream.write(data)
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def shutdown(self):
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if not self.p:
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return
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self.stream.close()
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self.p.terminate()
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