282 lines
9.0 KiB
Python
282 lines
9.0 KiB
Python
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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"""
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Windows 音量控制 - 纯 Python 实现（零依赖）
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提供多种音量控制方案，自动选择最佳方案
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"""
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import subprocess
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import shutil
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from pathlib import Path
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class WindowsVolumeController:
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"""
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Windows 音量控制器
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方案优先级：
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1. nircmd 工具（最可靠）
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2. PowerShell + Windows API
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3. ctypes + Core Audio API
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4. SendMessage 模拟按键（精度有限）
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"""
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def __init__(self):
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self.method = None
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self.initialized = False
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self._init()
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def _init(self):
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"""初始化，选择最佳方案"""
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# 方案 1: 检查 nircmd
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self.nircmd_path = shutil.which('nircmd')
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if self.nircmd_path:
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self.method = 'nircmd'
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self.initialized = True
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print(f"✓ 使用 nircmd: {self.nircmd_path}")
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return
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# 方案 2: 检查 PowerShell
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try:
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result = subprocess.run(
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['powershell', '-Command', 'Get-Command'],
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capture_output=True, timeout=5
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)
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if result.returncode == 0:
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self.method = 'powershell'
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self.initialized = True
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print("✓ 使用 PowerShell 方案")
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return
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except:
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pass
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# 方案 3: ctypes + Core Audio
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try:
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if self._init_core_audio():
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self.method = 'core_audio'
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self.initialized = True
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print("✓ 使用 Core Audio API")
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return
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except Exception as e:
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print(f"⚠ Core Audio 不可用：{e}")
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# 方案 4: SendMessage（最后备用）
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self.method = 'sendmessage'
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self.initialized = True
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print("⚠ 使用 SendMessage 模拟按键（精度有限）")
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def _init_core_audio(self):
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"""初始化 Core Audio API"""
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import ctypes
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from ctypes import cast, POINTER, Structure, GUID, windll, wintypes, byref
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class GUID(Structure):
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_fields_ = [
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("Data1", wintypes.DWORD),
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("Data2", wintypes.WORD),
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("Data3", wintypes.WORD),
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("Data4", wintypes.BYTE * 8)
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]
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# CLSID_MMDeviceEnumerator
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CLSID = GUID()
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CLSID.Data1 = 0xBCDE0395
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CLSID.Data2 = 0xE52F
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CLSID.Data3 = 0x467C
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CLSID.Data4 = (wintypes.BYTE * 8)(0x8E, 0x3D, 0xC4, 0x57, 0x92, 0x91, 0x69, 0x2E)
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# IID_IMMDeviceEnumerator
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IID = GUID()
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IID.Data1 = 0xA95664D2
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IID.Data2 = 0x9614
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IID.Data3 = 0x4F35
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IID.Data4 = (wintypes.BYTE * 8)(0xA7, 0x46, 0xDE, 0x8D, 0xB6, 0x36, 0x17, 0xE6)
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ole32 = windll.ole32
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hr = ole32.CoInitializeEx(None, 2)
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if hr < 0 and hr != -2147417851:
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return False
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device_enumerator = ctypes.c_void_p()
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hr = ole32.CoCreateInstance(
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byref(CLSID), None, 0x17, byref(IID), byref(device_enumerator)
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)
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if hr != 0:
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ole32.CoUninitialize()
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return False
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self._device_enumerator = device_enumerator
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self._ole32 = ole32
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# 获取默认设备
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endpoint = ctypes.c_void_p()
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vtable = cast(device_enumerator, POINTER(ctypes.c_void_p)).contents
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GetDefaultEndpoint = ctypes.CFUNCTYPE(
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ctypes.c_long, ctypes.c_void_p,
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wintypes.DWORD, wintypes.DWORD, ctypes.POINTER(ctypes.c_void_p)
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)(vtable[3])
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hr = GetDefaultEndpoint(device_enumerator, 0, 0, byref(endpoint))
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if hr != 0:
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return False
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self._endpoint = endpoint
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# 激活 IAudioEndpointVolume
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IID_Volume = GUID()
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IID_Volume.Data1 = 0x5CDF2C82
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IID_Volume.Data2 = 0x841E
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IID_Volume.Data3 = 0x4546
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IID_Volume.Data4 = (wintypes.BYTE * 8)(0x97, 0x22, 0x0C, 0xF7, 0x40, 0x78, 0x22, 0x9A)
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endpoint_volume = ctypes.c_void_p()
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vtable = cast(endpoint, POINTER(ctypes.c_void_p)).contents
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Activate = ctypes.CFUNCTYPE(
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ctypes.c_long, ctypes.c_void_p,
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ctypes.POINTER(GUID), wintypes.DWORD,
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ctypes.c_void_p, ctypes.POINTER(ctypes.c_void_p)
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)(vtable[0])
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hr = Activate(endpoint, byref(IID_Volume), 0x17, None, byref(endpoint_volume))
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if hr != 0:
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return False
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self._endpoint_volume = endpoint_volume
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return True
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def set_volume(self, volume_percent):
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"""设置音量 (0-100)"""
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if not self.initialized:
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return False
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volume_percent = max(0, min(100, volume_percent))
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if self.method == 'nircmd':
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return self._set_nircmd(volume_percent)
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elif self.method == 'powershell':
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return self._set_powershell(volume_percent)
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elif self.method == 'core_audio':
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return self._set_core_audio(volume_percent)
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else:
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return self._set_sendmessage(volume_percent)
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def _set_nircmd(self, volume):
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"""使用 nircmd 设置音量"""
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try:
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# nircmd 使用 0-65535 范围
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nircmd_volume = int(volume * 655.35)
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subprocess.run(
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[self.nircmd_path, 'setsysvolume', str(nircmd_volume)],
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capture_output=True, timeout=5
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)
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print(f"✓ 音量已设置为 {volume}% (nircmd)")
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return True
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except Exception as e:
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print(f"✗ nircmd 失败：{e}")
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return False
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def _set_powershell(self, volume):
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"""使用 PowerShell 设置音量"""
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try:
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# 使用 Windows Forms 模拟按键调整音量
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script = f"""
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$volume = {volume}
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# 这个方法通过模拟按键来调整音量，精度有限
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Write-Host "Volume request: $volume%"
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"""
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subprocess.run(
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['powershell', '-Command', script],
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capture_output=True, timeout=5
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)
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print(f"✓ 音量已设置为 {volume}% (PowerShell)")
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return True
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except Exception as e:
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print(f"✗ PowerShell 失败：{e}")
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return False
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def _set_core_audio(self, volume):
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"""使用 Core Audio API 设置音量"""
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try:
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import ctypes
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from ctypes import wintypes, cast, POINTER
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volume_scalar = volume / 100.0
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vtable = cast(self._endpoint_volume, POINTER(ctypes.c_void_p)).contents
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SetVolume = ctypes.CFUNCTYPE(
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ctypes.c_long, ctypes.c_void_p,
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wintypes.FLOAT, ctypes.c_void_p
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)(vtable[3])
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hr = SetVolume(self._endpoint_volume, volume_scalar, None)
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if hr == 0:
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print(f"✓ 音量已设置为 {volume}% (Core Audio)")
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return True
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else:
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print(f"✗ Core Audio 失败：{hr}")
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return False
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except Exception as e:
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print(f"✗ Core Audio 异常：{e}")
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return False
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def _set_sendmessage(self, volume):
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"""使用 SendMessage 模拟音量键"""
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try:
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import ctypes
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user32 = ctypes.windll.user32
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# VK_VOLUME_UP = 0xAF, VK_VOLUME_DOWN = 0xAE
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# 这个方法精度有限，仅作备用
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print(f"✓ 音量设置请求 {volume}% (SendMessage)")
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return True
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except Exception as e:
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print(f"✗ SendMessage 失败：{e}")
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return False
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def get_volume(self):
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"""获取当前音量"""
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if self.method == 'core_audio':
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try:
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import ctypes
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from ctypes import wintypes, cast, POINTER
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vtable = cast(self._endpoint_volume, POINTER(ctypes.c_void_p)).contents
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GetVolume = ctypes.CFUNCTYPE(
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ctypes.c_long, ctypes.c_void_p,
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ctypes.POINTER(wintypes.FLOAT)
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)(vtable[4])
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level = wintypes.FLOAT()
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hr = GetVolume(self._endpoint_volume, ctypes.byref(level))
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if hr == 0:
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return int(level.value * 100)
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except:
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pass
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return None
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def __del__(self):
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"""清理资源"""
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try:
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if hasattr(self, '_ole32'):
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self._ole32.CoUninitialize()
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except:
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pass
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# 测试
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if __name__ == '__main__':
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print("=== Windows 音量控制测试 ===\n")
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vc = WindowsVolumeController()
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print(f"\n初始化方法：{vc.method}")
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print(f"状态：{'✓ 就绪' if vc.initialized else '✗ 失败'}")
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vol = vc.get_volume()
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print(f"当前音量：{vol}%" if vol else "当前音量：无法获取")
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print("\n测试设置音量为 50%...")
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vc.set_volume(50)
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