[wdmaudiodev] Re: Two identic soundcards installed
- From: "Markus Bollinger" <bollinger@xxxxxxxxxxxx>
- To: <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Mon, 3 Oct 2005 15:30:21 +0200
My problem comes from the DirectX examples:
Most applications use sample code from DirectX SDK to enumerate Sound Cards
(DirectSoundEnumerate) with following callback:
BOOL CALLBACK DSEnumProc(LPGUID lpGUID,
LPCTSTR lpszDesc,
LPCTSTR lpszDrvName,
LPVOID lpContext )
{
HWND hCombo = (HWND)lpContext;
LPGUID lpTemp = NULL;
if (lpGUID != NULL) // NULL only for "Primary Sound Driver".
{
if ((lpTemp = (LPGUID)malloc(sizeof(GUID))) == NULL)
{
return(TRUE);
}
memcpy(lpTemp, lpGUID, sizeof(GUID));
}
ComboBox_AddString(hCombo, lpszDesc);
ComboBox_SetItemData(hCombo,
ComboBox_FindString(hCombo, 0, lpszDesc),
lpTemp );
free(lpTemp);
return(TRUE);
}
If there are two sound cards with the same friendly name for the Wave device,
they will be enumerated twice with the same name but a different GUID.
But the ComboBox_FindString() will never find the second or third card in the
ComboBox.
As there are already existing many DirectSound applications, should I consider
- implementing KSPROPERTY_GENERAL_COMPONENTID to give each device a unique name,
- or are there other known solutions ?
- Markus
> -----Message d'origine-----
> De : wdmaudiodev-bounce@xxxxxxxxxxxxx
> [mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx]De la part de Markus
> Bollinger
> Envoyé : vendredi 30 septembre 2005 16:12
> À : wdmaudiodev@xxxxxxxxxxxxx
> Objet : [wdmaudiodev] Two identic soundcards installed
>
>
> Hello!
>
> If I have two identic Soundcards installed on my PC (e.g.
> "Creative Sound Blaster PCI"),
> on MME the second card gets the extension "(2)" to it's
> friendly device name.
> To select a device, MME based applications, the WaveMapper or
> SoundVol32 work correctly.
>
> But in DirectSound the "(2)" is not added.
>
> When I use WindowsMediaPlayer 10, I cannot select the second card
> When I use WinAmp 5, I can select the second card for output,
> but it will play on the first one.
>
> Have I to consider this as application bugs, or should the
> driver implement some workaround :
>
> I saw that with KSPROPERTY_GENERAL_COMPONENTID
> the devices can be renamed in the driver, but it seems that
> this does not work on Windows 2000
>
> Do you know other solutions ???
>
>
> - Markus
You can find Digigram at:
Integrated Systems Asia, Suntec, Singapore, October 12-14, 2005, Booth number:
F110
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