filter - C#：如何使用 directshow.net 显示此对话框？

Question

如何使用 Directshow.net 调用此对话框？

过滤器图

Answer 1

假设您有 IBaseFilter 参考，这样的事情会起作用：

[DllImport("oleaut32.dll", CharSet = CharSet.Auto)]
    internal static extern int OleCreatePropertyFrame(
        IntPtr hwndOwner,
        uint x, uint y,
        [MarshalAs(UnmanagedType.LPWStr)]
        string caption,
        uint objectCount,
        [MarshalAs(UnmanagedType.LPArray, ArraySubType = UnmanagedType.IUnknown)]
        object[] lplpUnk,
        int cPages,
        IntPtr pageClsID,
        Guid lcid,
        uint dwReserved,
        IntPtr lpvReserved);

    public void DisplayPropertyPages(Form form, IBaseFilter filter)
    {
            var propertyPages = filter as ISpecifyPropertyPages;
            DsCAUUID pages;
            FilterInfo info;
            int hr = filter.QueryFilterInfo(out info);
            DsError.ThrowExceptionForHR(hr);
            if (propertyPages == null)
            {
                throw new ApplicationException("IBaseFilter doesn't implement ISpecifyPropertyPages");
            }
            hr = propertyPages.GetPages(out pages);
            DsError.ThrowExceptionForHR(hr);
            var filters = new IBaseFilter[1];
            filters[0] = filter;
            hr = OleCreatePropertyFrame(form.Handle, 0, 0, info.achName, 1, filters,
                pages.cElems, pages.pElems, Guid.Empty, 0, IntPtr.Zero);
            Marshal.FreeCoTaskMem(pages.pElems);
            DsError.ThrowExceptionForHR(hr);
    }

Answer 2

请检查 MSDN 中 OleCreatePropertyFrame() 的描述。

Guid lcid is invalid. Result:
Managed Debugging Assistant 'PInvokeStackImbalance' has detected a problem in 'D:\CVS\Dev\Filters\H264\H264mfxEncoder\Samples\C#\H264EncoderTest\bin\Debug\H264EncoderTest.vshost.exe'.
Additional Information: A call to PInvoke function 'H264EncoderTest!H264EncoderTest.CGraph::OleCreatePropertyFrame' has unbalanced the stack. This is likely because the managed PInvoke signature does not match the unmanaged target signature. Check that the calling convention and parameters of the PInvoke signature match the target unmanaged signature.

一定是：

uint lcid and hr = OleCreatePropertyFrame(form.Handle, 0, 0, info.achName, 1, filters, pages.cElems, pages.pElems, 0, 0, IntPtr.Zero);