protected byte GetByteValue(Guid guidPropSet, uint propId)
{
Guid propertyGuid = guidPropSet;
IKsPropertySet propertySet = captureFilter as IKsPropertySet;
uint IsTypeSupported = 0;
uint uiSize;
if (propertySet == null)
{
//throw new ApplicationException("GetByteValue() properySet=null");
return(0);
}
int hr = propertySet.QuerySupported(ref propertyGuid, propId, out IsTypeSupported);
if (hr != 0 || (IsTypeSupported & (uint)KsPropertySupport.Get) == 0)
{
//throw new ApplicationException("GetByteValue() property is not supported");
return(0);
}
byte returnValue = 0;
KSPROPERTYByte propByte = new KSPROPERTYByte();
KSPROPERTY prop = new KSPROPERTY();
int sizeProperty = Marshal.SizeOf(prop);
int sizeByteProperty = Marshal.SizeOf(propByte);
KSPROPERTYByte newByteValue = new KSPROPERTYByte();
IntPtr pDataReturned = Marshal.AllocCoTaskMem(100);
Marshal.StructureToPtr(newByteValue, pDataReturned, true);
int adress = pDataReturned.ToInt32() + sizeProperty;
IntPtr ptrData = new IntPtr(adress);
hr = propertySet.RemoteGet(ref propertyGuid,
propId,
ptrData,
(uint)(sizeByteProperty - sizeProperty),
pDataReturned,
(uint)sizeByteProperty,
out uiSize);
if (hr == 0 && uiSize == 1)
{
returnValue = Marshal.ReadByte(ptrData);
}
Marshal.FreeCoTaskMem(pDataReturned);
if (hr != 0)
{
//throw new ApplicationException("GetByteValue() failed 0x{0:X}", hr);
}
return(returnValue);
}
protected void SetByteValue(Guid guidPropSet, uint propId, byte byteValue)
{
Guid propertyGuid = guidPropSet;
IKsPropertySet propertySet = captureFilter as IKsPropertySet;
if (propertySet == null)
{
//throw new ApplicationException("GetByteValue() properySet=null");
return;
}
uint IsTypeSupported = 0;
int hr = propertySet.QuerySupported(ref propertyGuid, propId, out IsTypeSupported);
if (hr != 0 || (IsTypeSupported & (uint)KsPropertySupport.Set) == 0)
{
// throw new ApplicationException("SetByteValue() property is not supported");
return;
}
KSPROPERTYByte KsProperty = new KSPROPERTYByte();
KsProperty.byData = byteValue;
IntPtr pDataReturned = Marshal.AllocCoTaskMem(100);
Marshal.StructureToPtr(KsProperty, pDataReturned, false);
hr = propertySet.RemoteSet(ref propertyGuid,
propId,
pDataReturned,
1,
pDataReturned,
(uint)Marshal.SizeOf(KsProperty));
Marshal.FreeCoTaskMem(pDataReturned);
if (hr != 0)
{
//throw new ApplicationException("SetByteValue() failed 0x{0:X}", hr);
}
}
