问PyQt5选择将播放哪个音频设备输出

EN

import sys
from PyQt5 import QtCore, QtMultimedia
from PyQt5.QtMultimedia import QAudio, QAudioDeviceInfo
from PyQt5.QtWidgets import QApplication, QWidget, QPushButton, QComboBox


class SimplePlay(QWidget):
    def __init__(self):
        super().__init__()
        self.player = QtMultimedia.QMediaPlayer()
        url = QtCore.QUrl.fromLocalFile(QtCore.QDir.current().absoluteFilePath("example.mp3"))
        self.sound_file = QtMultimedia.QMediaContent(url)

        button = QPushButton("Play", self)
        button.clicked.connect(self.on_click)

        self.combo_box_devices = QComboBox(self)
        self.combo_box_devices.setGeometry(0, 50, 300, 50)
        for device in QAudioDeviceInfo.availableDevices(QAudio.AudioOutput):
            self.combo_box_devices.addItem(device.deviceName())

        self.show()

    def on_click(self):
        self.player.setMedia(self.sound_file)
        self.player.play()


if __name__ == '__main__':
    app = QApplication(sys.argv)
    ex = SimplePlay()
    sys.exit(app.exec_())

    scv: QtMultimedia.QMediaService = self.player.service()
    out: QtMultimedia.QAudioOutputSelectorControl = scv.requestControl("org.qt-project.qt.audiooutputselectorcontrol/5.0")
    out.setActiveOutput(self.combo_box_devices.currentText())
    scv.releaseControl(out)
    scv = self.player.service()

    out = scv.requestControl("org.qt-project.qt.audiooutputselectorcontrol/5.0")
    out.setActiveOutput(self.combo_box_devices.currentText())

    scv.releaseControl(out)