Использование функции LiveDeviceSource.ShowConfigurationDialog
из Expression Encoder SDK обычно является хорошим выбором.В моем случае, однако, у меня были некоторые источники захвата, которые не могли быть должным образом созданы Expression Encoder, если они неправильно настроены.Чтобы настроить их правильно, мне нужны их диалоговые окна конфигурации.Итак, я собрал это решение, используя DirectShow.NET :
/// <summary>
/// Retrieves the IBaseFilter with the requested name
/// </summary>
/// <param name="deviceName">The friendly name of the device to retrieve</param>
/// <param name="deviceType">The type of device to retrieve</param>
/// <returns>Returns the filter with the given friendly name, or null if no such filter exists</returns>
public static IBaseFilter GetDeviceFilterByName(string deviceName, EncoderDeviceType deviceType)
{
int hr = 0;
IEnumMoniker classEnum = null;
IMoniker[] moniker = new IMoniker[1];
// Create the system device enumerator
ICreateDevEnum devEnum = (ICreateDevEnum)new CreateDevEnum();
// Create an enumerator for the video or audio capture devices
if (deviceType == EncoderDeviceType.Audio)
{
hr = devEnum.CreateClassEnumerator(FilterCategory.AudioInputDevice, out classEnum, 0);
} else
{
hr = devEnum.CreateClassEnumerator(FilterCategory.VideoInputDevice, out classEnum, 0);
}
DsError.ThrowExceptionForHR(hr);
Marshal.ReleaseComObject(devEnum);
// no enumerators for video/audio input devices
if (classEnum == null)
{
return null;
}
IBaseFilter foundFilter = null;
// enumerate all input devices, looking for one with the desired friendly name
while(classEnum.Next(moniker.Length, moniker, IntPtr.Zero) == 0)
{
Guid iid = typeof(IPropertyBag).GUID;
object props;
moniker[0].BindToStorage(null, null, ref iid, out props);
object currentName;
(props as IPropertyBag).Read("FriendlyName", out currentName, null);
if ((string)currentName == deviceName)
{
object filter;
iid = typeof(IBaseFilter).GUID;
moniker[0].BindToObject(null, null, ref iid, out filter);
foundFilter = (IBaseFilter)filter;
Marshal.ReleaseComObject(moniker[0]);
break;
}
Marshal.ReleaseComObject(moniker[0]);
}
Marshal.ReleaseComObject(classEnum);
return foundFilter;
}
/// <summary>
/// Opens the property pages for the filter with the given name
/// </summary>
/// <param name="filter">The filter for which we wish to retrieve and open the property pages</param>
public static void ShowDevicePropertyPages(IBaseFilter filter, IntPtr handle)
{
// get the ISpecifyPropertyPages for the filter
ISpecifyPropertyPages pProp = filter as ISpecifyPropertyPages;
int hr = 0;
if (pProp == null)
{
// if the filter doesn't implement ISpecifyPropertyPages, try displaying IAMVfwCompressDialogs instead
IAMVfwCompressDialogs compressDialog = filter as IAMVfwCompressDialogs;
if (compressDialog != null)
{
hr = compressDialog.ShowDialog(VfwCompressDialogs.Config, IntPtr.Zero);
DsError.ThrowExceptionForHR(hr);
}
return;
}
// get the name of the filter from the FilterInfo struct
FilterInfo filterInfo;
hr = filter.QueryFilterInfo(out filterInfo);
DsError.ThrowExceptionForHR(hr);
// get the propertypages from the property bag
DsCAUUID caGUID;
hr = pProp.GetPages(out caGUID);
DsError.ThrowExceptionForHR(hr);
// create and display the OlePropertyFrame
object[] oDevice = new[] {(object)filter};
hr = OleCreatePropertyFrame(handle, 0, 0, filterInfo.achName, 1, oDevice,
caGUID.cElems, caGUID.ToGuidArray(), 0, 0, 0);
DsError.ThrowExceptionForHR(hr);
// release COM objects
Marshal.FreeCoTaskMem(caGUID.pElems);
Marshal.ReleaseComObject(pProp);
if (filterInfo.pGraph != null)
{
Marshal.ReleaseComObject(filterInfo.pGraph);
}
}
[DllImport("oleaut32.dll", CharSet = CharSet.Unicode, ExactSpelling = true)]
static extern int OleCreatePropertyFrame(IntPtr hwndOwner,
int x,
int y,
[MarshalAs(UnmanagedType.LPWStr)] string lpszCaption,
int cObjects,
[MarshalAs(UnmanagedType.LPArray, SizeParamIndex = 4, ArraySubType = UnmanagedType.IUnknown)] object[] lplpUnk,
int cPages,
[MarshalAs(UnmanagedType.LPArray, SizeParamIndex = 6)] Guid[] lpPageClsID,
int lcid,
int dwReserved,
int lpvReserved);
Использование:
var device = GetDeviceFilterByName(_settingsViewModel.VideoEncoderDevice.Name, EncoderDeviceType.Video);
ShowDevicePropertyPages(device, new HandleRef(ConfigurationDialogHost,
ConfigurationDialogHost.Handle).Handle);