/// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=
/// <summary>
/// Demonstrates the client/transform communications. Displays the
/// frame count in the rotator transform by calling the get accessor
/// of a property
///
/// This function uses late binding and expects the rotator transform
/// to be instantiated.
/// </summary>
/// <history>
/// 01 Nov 18 Cynic - Originally Written
/// </history>
private void buttonGetFCViaProperty_Click(object sender, EventArgs e)
{
LogMessage("buttonGetFCViaProperty_Click called");
// get the transform
IMFTransform transformObject = ctlTantaEVRFilePlayer1.GetTransform();
if (transformObject == null)
{
LogMessage("buttonGetFCViaProperty: transformObject == null");
OISMessageBox("No transform object. Is the video running?");
return;
}
// get the real type of the transform. This assumes it is a .NET
// based transform - otherwise it will probably just be a generic
// _ComObject and the code below will fail.
Type transformObjectType = transformObject.GetType();
// set up to invoke the FrameCountAsPropertyDemonstrator. Note that
// we have to know the name of the propery we are calling and the
// type it takes.
try
{
object frameCount = transformObjectType.InvokeMember("FrameCountAsPropertyDemonstrator", BindingFlags.GetProperty, null, transformObject, null);
if ((frameCount is int) == true)
{
LogMessage("The frame count is " + frameCount.ToString());
OISMessageBox("FrameCount=" + frameCount.ToString());
}
}
catch (Exception ex)
{
OISMessageBox("An error occured please see the logfile");
LogMessage(ex.Message);
LogMessage(ex.StackTrace);
}
}
/// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=
/// <summary>
/// Demonstrates the client/transform communications. Displays the
/// frame count in the rotator transform by calling the a function.
/// The function requires two parameters a leading string and a ref string
/// which is the output. A boolean is returned to indicate success. The
/// frame count is appended to the user supplied leading string.
///
/// This function uses late binding and expects the rotator transform
/// to be instantiated.
/// </summary>
/// <history>
/// 01 Nov 18 Cynic - Originally Written
/// </history>
private void buttonGetFCViaFunction_Click(object sender, EventArgs e)
{
LogMessage("buttonGetFCViaFunction_Click called");
// get the transform
IMFTransform transformObject = ctlTantaEVRFilePlayer1.GetTransform();
if (transformObject == null)
{
LogMessage("buttonGetFCViaFunction: transformObject == null");
OISMessageBox("No transform object. Is the video running?");
return;
}
// get the real type of the transform. This assumes it is a .NET
// based transform - otherwise it will probably just be a generic
// _ComObject and the code below will fail.
Type transformObjectType = transformObject.GetType();
// set up our parameters. both are strings, the second is ref string
object[] parameters = new object[2];
string outText = "Unknown FrameCount";
parameters[0] = "I just checked, the frame count is ";
parameters[1] = outText;
// set up our parameter modifiers. This is how we tell the InvokeMember
// call that one of our parameters is a ref
ParameterModifier paramMods = new ParameterModifier(2);
paramMods[1] = true;
ParameterModifier[] paramModifierArray = { paramMods };
try
{
// set up to invoke the FrameCountAsFunctionDemonstrator. Note that
// we have to know the name of the function we are calling, the return
// type and its parameter types
object retVal = transformObjectType.InvokeMember("FrameCountAsFunctionDemonstrator", BindingFlags.InvokeMethod, null, transformObject, parameters, paramModifierArray, null, null);
if ((retVal is bool) == false)
{
LogMessage("buttonGetFCViaFunction_Click: call to FrameCountAsFunctionDemonstrator failed.");
OISMessageBox("call to FrameCountAsFunctionDemonstrator failed.");
return;
}
}
catch (Exception ex)
{
OISMessageBox("An error occured please see the logfile");
LogMessage(ex.Message);
LogMessage(ex.StackTrace);
}
if (parameters[1] == null)
{
LogMessage("buttonGetFCViaFunction_Click: Null value returned for ref parameter.");
OISMessageBox("Null value returned for ref parameter.");
return;
}
if ((parameters[1] is string) == false)
{
LogMessage("buttonGetFCViaFunction_Click: Reference value is not a string");
OISMessageBox("Reference value is not a string.");
return;
}
LogMessage("buttonGetFCViaFunction_Click: " + (parameters[1] as string));
OISMessageBox((parameters[1] as string));
}