python 调节 Windows 系统音量

windowsVolumeAdjust.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

# pip3 install pycaw -i https://pypi.douban.com/simple
# https://docs.microsoft.com/en-us/windows/win32/api/endpointvolume/nf-endpointvolume-iaudioendpointvolume-getvolumerange

from ctypes import cast, POINTER
from comtypes import CLSCTX_ALL
from pycaw.pycaw import AudioUtilities, IAudioEndpointVolume


def getVolume():
    devices = AudioUtilities.GetSpeakers()
    interface = devices.Activate(IAudioEndpointVolume._iid_, CLSCTX_ALL, None)
    volume = cast(interface, POINTER(IAudioEndpointVolume))
    v = volume.GetMasterVolumeLevel()
    vmin,vmax,vinc = volume.GetVolumeRange()
    return 100 * (v - vmin)/(vmax - vmin)

def setVolume(v):
    if v < 0 or v > 100:
        return

    devices = AudioUtilities.GetSpeakers()
    interface = devices.Activate(IAudioEndpointVolume._iid_, CLSCTX_ALL, None)
    volume = cast(interface, POINTER(IAudioEndpointVolume))

    vmin,vmax,vinc = volume.GetVolumeRange()
    volume.SetMasterVolumeLevel(vmin + v*(vmax-vmin)/100.0, None)


# 设置静音，mute为1代表是静音，为0代表取消静音
# volume.SetMute(0, None)

def main():
    import sys
    if len(sys.argv) == 1:
        return print(getVolume())
    setVolume(float(sys.argv[1]))

if __name__ == '__main__':
    main()


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