public static IPin FindPin(IBaseFilter filter, int index, PIN_DIRECTION direction)
{
int curr_index = 0;
var result = EnumPins(filter, (info) =>
{
if (info.dir != direction)
{
return(false);
}
return(index == curr_index++);
});
if (result == null)
{
throw new ArgumentException("Can't find pin.");
}
return(result);
}
/// <summary>
/// コンストラクタ
/// </summary>
/// <param name="name">名称</param>
/// <param name="dir">方向</param>
public CxPinInfo(string name, PIN_DIRECTION dir)
{
Name = name;
Direction = dir;
}
public int FindPin([NativeTypeName("IUnknown *")] IUnknown *pSource, PIN_DIRECTION pindir, [NativeTypeName("const GUID *")] Guid *pCategory, [NativeTypeName("const GUID *")] Guid *pType, [NativeTypeName("BOOL")] int fUnconnected, int num, [NativeTypeName("IPin **")] IPin **ppPin)
{
return(((delegate * unmanaged <ICaptureGraphBuilder2 *, IUnknown *, PIN_DIRECTION, Guid *, Guid *, int, int, IPin **, int>)(lpVtbl[11]))((ICaptureGraphBuilder2 *)Unsafe.AsPointer(ref this), pSource, pindir, pCategory, pType, fUnconnected, num, ppPin));
}
/// <summary>
/// コンストラクタ
/// </summary>
/// <param name="name">ピン名称</param>
/// <param name="direction">ピンの向き</param>
public CxDSPinInfo(string name, PIN_DIRECTION direction)
{
Name = name;
Direction = direction;
}
/// <summary>
/// ピンの検索
/// </summary>
/// <param name="filter">フィルタ</param>
/// <param name="index">番号 [0~]</param>
/// <param name="direction">方向 (Unknown を指定した場合、方向に関係なく列挙されます)</param>
/// <returns>
/// 見つかった場合は、ピンの IPin インターフェースを返します。
/// 見つからなかった場合は、 null を返します。
/// </returns>
public static IPin FindPin(IBaseFilter filter, int index, PIN_DIRECTION direction)
{
IEnumPins enumpins = null;
IPin pin = null;
try
{
filter.EnumPins(ref enumpins);
int fetched = 0;
while (enumpins.Next(1, ref pin, ref fetched) == 0)
{
if (fetched == 0)
{
break;
}
var info = new PIN_INFO();
try
{
pin.QueryPinInfo(info);
if (info.dir == direction)
{
if (index <= 0)
{
return(pin);
}
index--;
}
if (pin != null)
{
Marshal.ReleaseComObject(pin);
}
pin = null;
}
finally
{
if (info.pFilter != null)
{
Marshal.ReleaseComObject(info.pFilter);
}
}
}
}
catch
{
if (pin != null)
{
Marshal.ReleaseComObject(pin);
}
throw;
}
finally
{
if (enumpins != null)
{
Marshal.ReleaseComObject(enumpins);
}
}
return(null);
}
