＜Python＞使用python来控制windows系统音量

news2024/11/26 14:31:07

使用python可以对windows系统的音量进行读取或者设置。

平台：visual studio code
语言：python
需要的python模块：
1、pyqt5
2、ctypes：

ctypes 是 Python 的外部函数库。它提供了与 C 兼容的数据类型，并允许调用 DLL 或共享库中的函数。可使用该模块以纯
Python 形式对这些库进行封装。

这里是引用

3、comtypes：

comtypes是一个基于ctypes-ffi外部函数库的纯Python COM包

这里是引用

4、pycaw

Python核心音频WindowsAPI库

UI界面：
在这里插入图片描述

代码：

1、初始化音量接口

def init_vol(self):
        """初始化音量对应"""   
          # 音量对应关系
        # 0% --- -65.25
        # 55% --- -8.92
        # 100% --- 0.0
        self.volume_match={0: -65.25, 1: -56.99, 2: -51.67, 3: -47.74, 4: -44.62, 5: -42.03, 6: -39.81, 7: -37.89, 8: -36.17, 9: -34.63, 10: -33.24,
            11: -31.96, 12: -30.78, 13: -29.68, 14: -28.66, 15: -27.7, 16: -26.8, 17: -25.95, 18: -25.15, 19: -24.38, 20: -23.65,
            21: -22.96, 22: -22.3, 23: -21.66, 24: -21.05, 25: -20.46, 26: -19.9, 27: -19.35, 28: -18.82, 29: -18.32, 30: -17.82,
            31: -17.35, 32: -16.88, 33: -16.44, 34: -16.0, 35: -15.58, 36: -15.16, 37: -14.76, 38: -14.37, 39: -13.99, 40: -13.62,
            41: -13.26, 42: -12.9, 43: -12.56, 44: -12.22, 45: -11.89, 46: -11.56, 47: -11.24, 48: -10.93, 49: -10.63, 50: -10.33,
            51: -10.04, 52: -9.75, 53: -9.47, 54: -9.19, 55: -8.92, 56: -8.65, 57: -8.39, 58: -8.13, 59: -7.88, 60: -7.63,
            61: -7.38, 62: -7.14, 63: -6.9, 64: -6.67, 65: -6.44, 66: -6.21, 67: -5.99, 68: -5.76, 69: -5.55, 70: -5.33,
            71: -5.12, 72: -4.91, 73: -4.71, 74: -4.5, 75: -4.3, 76: -4.11, 77: -3.91, 78: -3.72, 79: -3.53, 80: -3.34,
            81: -3.15, 82: -2.97, 83: -2.79, 84: -2.61, 85: -2.43, 86: -2.26, 87: -2.09, 88: -1.91, 89: -1.75, 90: -1.58,
            91: -1.41, 92: -1.25, 93: -1.09, 94: -0.93, 95: -0.77, 96: -0.61, 97: -0.46, 98: -0.3, 99: -0.15, 100: 0.0}
        #音量值反对应
        self.volume_match_2={-65.25:0, -56.99:1, -51.67:2, -47.74:3, -44.62:4, -42.03:5, -39.81:6,-37.89:7, -36.17:8, -34.63:9, -33.24:10,
            -31.96:11, -30.78:12, -29.68:13, -28.66:14, -27.7:15, -26.8:16, -25.95:17, -25.15:18,  -24.38:19, -23.65:20,
            -22.96:21, -22.3:22, -21.66:23, -21.05:24, -20.46:25, -19.9:26, -19.35:27,  -18.82:28,  -18.32:29,  -17.82:30,
            -17.35:31, -16.88:32, -16.44:33, -16.0:34, -15.58:35,-15.16:36, -14.76:37, -14.37:38,  -13.99:39, -13.62:40,
            -13.26:41, -12.9:42, -12.56:43, -12.22:44,-11.89:45, -11.56:46, -11.24:47, -10.93:48,  -10.63:49, -10.33:50,
            -10.04:51, -9.75:52, -9.47:53, -9.19:54, -8.92:55, -8.65:56, -8.39:57, -8.13:58,  -7.88:59,  -7.63:60,
            -7.38:61, -7.14:62, -6.9:63, -6.67:64, -6.44:65, -6.21:66, -5.99:67,  -5.76:68,  -5.55:69, -5.33:70,
            -5.12:71,-4.91:72, -4.71:73, -4.5:74, -4.3:75, -4.11:76,  -3.91:77, -3.72:78,  -3.53:79,  -3.34:80,
            -3.15:81, -2.97:82, -2.79:83, -2.61:84, -2.43:85, -2.26:86, -2.09:87,  -1.91:88, -1.75:89, -1.58:90,
           -1.41:91, -1.25:92, -1.09:93, -0.93:94, -0.77:95, -0.61:96, -0.46:97, -0.3:98,  -0.15:99,  0.0:100}
        self.devices11=AudioUtilities.GetSpeakers()
        self.interface=self.devices11.Activate(IAudioEndpointVolume._iid_,CLSCTX_ALL,None)
        self.volum11=cast(self.interface,POINTER(IAudioEndpointVolume))
        self.mute=self.volum11.GetMute()

电脑的音量虽然显示是一个整数，但实际的音量值是一个浮点数，就是上面代码里所列出的，从0到100的对应值。利用pycaw获取音频接口，然后激活，并将获取的输出转为C语言下的指针。

2、获取音量

  vm=self.volum11.GetMasterVolumeLevel()
        #print(vm)
        vm2=round(vm,2)
        #print(vm2)
        vm3=self.volume_match_2[vm2]
        #print(vm3)
        #v1=self.volum11.GetVolumeRange()
        #print(v1)
        #return vm3
        self.lbl1.setText(str(vm3))

获取音量，使用GetMasterVolumeLevel函数即可，这个函数获取的是一个浮点数，将浮点数作一下四舍五入的处理，小数点保留两位（与音量值数组对应），然后去数组里匹配，将对应的音量（整数）输出显示即可。

3、设置系统音量：

   v11=int(v1)
        self.sys_volume_value=self.volume_match[v11]
        #print(self.sys_volume_value)
        self.volum11.SetMasterVolumeLevel(self.sys_volume_value,None)