c++ - 如何检查麦克风和扬声器是否来自同一个声卡？

Question

我的问题是如何在 Windows 平台上检查麦克风和扬声器是否来自同一个声卡。如果它们来自不同的卡，那么处理时序的逻辑就会不同。我同时使用 DSound 和 WMME API。

Answer 1

WMI 确实提供了一些关于声卡的信息。我还没有弄清楚的是它的付出是否足够。使用“WMI Code Creator”，以下脚本列出了 Win32_SoundDevice 的所有内容对象存储:

strComputer = "." 
Set objWMIService = GetObject("winmgmts:\\" & strComputer & "\root\CIMV2") 
Set colItems = objWMIService.ExecQuery( _
    "SELECT * FROM Win32_SoundDevice",,48) 
For Each objItem in colItems 
    Wscript.Echo "-----------------------------------"
    Wscript.Echo "Win32_SoundDevice instance"
    Wscript.Echo "-----------------------------------"
    Wscript.Echo "Availability: " & objItem.Availability
    Wscript.Echo "Caption: " & objItem.Caption
    Wscript.Echo "ConfigManagerErrorCode: " & objItem.ConfigManagerErrorCode
    Wscript.Echo "ConfigManagerUserConfig: " & objItem.ConfigManagerUserConfig
    Wscript.Echo "CreationClassName: " & objItem.CreationClassName
    Wscript.Echo "Description: " & objItem.Description
    Wscript.Echo "DeviceID: " & objItem.DeviceID
    Wscript.Echo "DMABufferSize: " & objItem.DMABufferSize
    Wscript.Echo "ErrorCleared: " & objItem.ErrorCleared
    Wscript.Echo "ErrorDescription: " & objItem.ErrorDescription
    Wscript.Echo "InstallDate: " & objItem.InstallDate
    Wscript.Echo "LastErrorCode: " & objItem.LastErrorCode
    Wscript.Echo "Manufacturer: " & objItem.Manufacturer
    Wscript.Echo "MPU401Address: " & objItem.MPU401Address
    Wscript.Echo "Name: " & objItem.Name
    Wscript.Echo "PNPDeviceID: " & objItem.PNPDeviceID
    If isNull(objItem.PowerManagementCapabilities) Then
    Wscript.Echo "PowerManagementCapabilities: "
    Else
    Wscript.Echo "PowerManagementCapabilities: " & Join(objItem.PowerManagementCapabilities, ",")
    End If
    Wscript.Echo "PowerManagementSupported: " & objItem.PowerManagementSupported
    Wscript.Echo "ProductName: " & objItem.ProductName
    Wscript.Echo "Status: " & objItem.Status
    Wscript.Echo "StatusInfo: " & objItem.StatusInfo
    Wscript.Echo "SystemCreationClassName: " & objItem.SystemCreationClassName
    Wscript.Echo "SystemName: " & objItem.SystemName
Next

在我的笔记本电脑上运行可以得到

-----------------------------------
Win32_SoundDevice instance
-----------------------------------
Availability: 
Caption: ATI Function Driver for High Definition Audio - ATI AA01
ConfigManagerErrorCode: 0
ConfigManagerUserConfig: False
CreationClassName: Win32_SoundDevice
Description: ATI Function Driver for High Definition Audio - ATI AA01
DeviceID: HDAUDIO\FUNC_01&VEN_1002&DEV_AA01&SUBSYS_00AA0100&REV_1000\5&BB7E0F3&0&0001
DMABufferSize: 
ErrorCleared: 
ErrorDescription: 
InstallDate: 
LastErrorCode: 
Manufacturer: ATI
MPU401Address: 
Name: ATI Function Driver for High Definition Audio - ATI AA01
PNPDeviceID: HDAUDIO\FUNC_01&VEN_1002&DEV_AA01&SUBSYS_00AA0100&REV_1000\5&BB7E0F3&0&0001
PowerManagementCapabilities: 
PowerManagementSupported: False
ProductName: ATI Function Driver for High Definition Audio - ATI AA01
Status: OK
StatusInfo: 3
SystemCreationClassName: Win32_ComputerSystem
SystemName: BABEL
-----------------------------------
Win32_SoundDevice instance
-----------------------------------
Availability: 
Caption: Conexant High Definition SmartAudio 221
ConfigManagerErrorCode: 0
ConfigManagerUserConfig: False
CreationClassName: Win32_SoundDevice
Description: Conexant High Definition SmartAudio 221
DeviceID: HDAUDIO\FUNC_01&VEN_14F1&DEV_5051&SUBSYS_1179FF5B&REV_1000\4&2DBDAC14&0&0001
DMABufferSize: 
ErrorCleared: 
ErrorDescription: 
InstallDate: 
LastErrorCode: 
Manufacturer: Conexant
MPU401Address: 
Name: Conexant High Definition SmartAudio 221
PNPDeviceID: HDAUDIO\FUNC_01&VEN_14F1&DEV_5051&SUBSYS_1179FF5B&REV_1000\4&2DBDAC14&0&0001
PowerManagementCapabilities: 
PowerManagementSupported: False
ProductName: Conexant High Definition SmartAudio 221
Status: OK
StatusInfo: 3
SystemCreationClassName: Win32_ComputerSystem
SystemName: BABEL

我不知道里面有没有什么有用的。这是一个棘手的问题。