Method _enableStream

interface/vstream/python/vsi_audio_server.py:369–454

Enable the audio stream for input (microphone/file) or output (file/speakers). Initializes the PyAudio stream or wave file as needed. Returns: None

(self)

        return (data, pyaudio.paContinue)

    def _enableStream(self):
        """
        Enable the audio stream for input (microphone/file) or output (file/speakers).

        Initializes the PyAudio stream or wave file as needed.
        Returns:
            None
        """
        if self.active:
            logger.info("_enableStream: stream already active")
            return

        self.eos = False
        self.audio_buffer.clear()

        try:
            if self.filename == None:
                # Use microphone/speakers
                if self.pyaudio_obj is None:
                    logger.error("_enableStream: PyAudio object is not initialized")
                    return

                audio_format = self._get_pyaudio_format()

                if self.mode == MODE_AUDIO_INPUT:
                    logger.debug("_enableStream: use microphone for input streaming")
                    self.stream = self.pyaudio_obj.open(
                        format=audio_format,
                        channels=self.channels,
                        rate=self.sample_rate,
                        input=True,
                        input_device_index=self.device,
                        frames_per_buffer=self.chunk_size,
                        stream_callback=self._audio_callback_input
                    )
                    self.stream.start_stream()

                if self.mode == MODE_AUDIO_OUTPUT:
                    logger.debug("_enableStream: use speakers for output streaming")
                    self.stream = self.pyaudio_obj.open(
                        format=audio_format,
                        channels=self.channels,
                        rate=self.sample_rate,
                        output=True,
                        output_device_index=self.device,
                        frames_per_buffer=self.chunk_size,
                        stream_callback=self._audio_callback_output
                    )
                    self.stream.start_stream()

                logger.info(f"_enableStream: audio device stream properties: channels={self.channels}, rate={self.sample_rate}, bits={self.sample_bits}")

            else:
                # Set file name string for audio file
                file = str(self.filename.absolute())

                logger.debug(f"_enableStream: use audio file: {file}")