public override object EditValue(ITypeDescriptorContext context, System.IServiceProvider provider, object value)
{
if (context != null && context.Instance != null && provider != null)
{
edSvc = (IWindowsFormsEditorService)provider.GetService(typeof(IWindowsFormsEditorService));
if (edSvc != null)
{
System.Windows.Forms.ListBox vListBox = new ListBox();
vListBox.BorderStyle = BorderStyle.None;
vListBox.Click += new EventHandler(List_Click);
//vListBox.Items.Add("");
ChannelAnalogic.CaptureFormat currentCaptureFormat = value as ChannelAnalogic.CaptureFormat;
string captureDeviceName = "";
if (context.Instance is ChannelAnalogic)
{
captureDeviceName = (context.Instance as ChannelAnalogic).VideoCaptureDeviceName;
}
else if (context.Instance is Array)
{
object[] array = context.Instance as object[];
if (array.Length > 0)
{
ChannelAnalogic channelAnalogic = array[0] as ChannelAnalogic;
if (channelAnalogic != null)
{
bool sameChannelAndVideoCaptureDevice = true;
foreach (Channel channel in array)
{
if (!(channel is ChannelAnalogic) || (channel as ChannelAnalogic).VideoCaptureDeviceName != channelAnalogic.VideoCaptureDeviceName)
{
sameChannelAndVideoCaptureDevice = false;
break;
}
}
if (sameChannelAndVideoCaptureDevice)
captureDeviceName = channelAnalogic.VideoCaptureDeviceName;
}
}
}
DsDevice[] tunDevices = DsDevice.GetDevicesOfCat(FilterCategory.VideoInputDevice);
foreach (DirectShowLib.DsDevice captureDevice in tunDevices)
{
if (captureDevice.Name == captureDeviceName)
{
Guid baseFilterIID = typeof(IBaseFilter).GUID;
object captureFilterObject;
captureDevice.Mon.BindToObject(null, null, ref baseFilterIID, out captureFilterObject);
IBaseFilter captureFilter = captureFilterObject as IBaseFilter;
if (captureFilter != null)
{
IPin pin = null;
//pin = DsFindPin.ByCategory(captureFilter, PinCategory.Preview, 0);
//if(pin == null)
pin = DsFindPin.ByCategory(captureFilter, PinCategory.Capture, 0);
if (pin != null)
{
IEnumMediaTypes enumMediaTypes = null;
int hr = pin.EnumMediaTypes(out enumMediaTypes);
if (enumMediaTypes != null)
{
try
{
AMMediaType[] mediaTypes = new AMMediaType[1];
//22 int cFetched = 0;
//22 while ((enumMediaTypes.Next(1, mediaTypes, out cFetched) == 0))
while ((enumMediaTypes.Next(1, mediaTypes, IntPtr.Zero) == 0))
{
AMMediaType mediaType = mediaTypes[0];
if (mediaType != null &&
mediaType.majorType == MediaType.Video &&
mediaType.formatType == FormatType.VideoInfo &&
mediaType.formatSize >= Marshal.SizeOf(typeof(VideoInfoHeader)) &&
mediaType.formatPtr != IntPtr.Zero)
{
VideoInfoHeader videoInfoHeader = (VideoInfoHeader)Marshal.PtrToStructure(mediaType.formatPtr, typeof(VideoInfoHeader));
string mediaSubType = (string)DeviceEnumerator.MediaSubTypeByGUID[mediaType.subType];
Trace.WriteLineIf(GraphBuilderBase.trace.TraceVerbose, string.Format("{0}x{1}, {2}, {3}", videoInfoHeader.BmiHeader.Width, videoInfoHeader.BmiHeader.Height, (int)10000000.0 / videoInfoHeader.AvgTimePerFrame, mediaSubType));
ChannelAnalogic.CaptureFormat newCaptureFormat = new ChannelAnalogic.CaptureFormat();
newCaptureFormat.Resolution = new Size(videoInfoHeader.BmiHeader.Width, videoInfoHeader.BmiHeader.Height);
newCaptureFormat.FramePerSecond = (int)(10000000.0 / videoInfoHeader.AvgTimePerFrame);
newCaptureFormat.MediaSubType = mediaSubType;
vListBox.Items.Add(newCaptureFormat);
}
DsUtils.FreeAMMediaType(mediaType);
}
}
finally
{
Marshal.ReleaseComObject(enumMediaTypes);
}
}
Marshal.ReleaseComObject(pin);
}
foreach (ChannelAnalogic.CaptureFormat cf in vListBox.Items)
{
if (cf.Equals(currentCaptureFormat))
{
vListBox.SelectedItem = cf;
break;
}
}
Marshal.ReleaseComObject(captureFilter);
}
break;
}
}
edSvc.DropDownControl(vListBox);
return vListBox.SelectedItem;
}
}
return null;
}
