在列表或菜单中列出捕获设备

list capture device in list or menu

本文关键字：列表 菜单      更新时间：2023-10-16

我不明白如何使用菜单或列表来允许用户选择合适的设备。少了一些东西。我不明白。你能让我清醒一下吗？

void    fillDevices(HWND list)
{
IPropertyBag *tmpBag=NULL;
    tmpMonk->BindToStorage(0,0,IID_IPropertyBag,(void **)&tmpBag);
    VariantInit(&varName);
    //DevicePath-Description-FriendlyName
    checkIt(tmpBag->Read(L"FriendlyName",&varName,0));
// i need to fill it  with device names and be able to chose from the list 
    VariantClear(&varName);
    tmpBag->Release();
}

Windows SDK AMCap示例正是这样做的：

// put all installed video and audio devices in the menus
//
void AddDevicesToMenu()
{
// ...
    while(hr = pEm->Next(1, &pM, &cFetched), hr==S_OK)
    {
        IPropertyBag *pBag=0;
        hr = pM->BindToStorage(0, 0, IID_IPropertyBag, (void **)&pBag);
        if(SUCCEEDED(hr))
        {
            VARIANT var;
            var.vt = VT_BSTR;
            hr = pBag->Read(L"FriendlyName", &var, NULL);
            if(hr == NOERROR)
            {
                AppendMenu(hMenuSub, MF_STRING, MENU_VDEVICE0 + uIndex,
                    var.bstrVal);
//...

Windows SDK中的相对路径：\Samples\multimedia\directshow\capture\amcap

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