Super Source Iterator

I was originally looking at the code for selecting inputs for AUX outputs in another thread and wanted to try and make a couple of changes to see if I could get some code working to do a similar thing for super source box inputs.

I hacked together the below code to try and change the input for box 1 on a button click (This was just an example to see if I could get it working) but I get the error "Specified cast is not valid." on the line "this.m_switcher.CreateIterator(ref ssIteratorIID, out ssIteratorPtr);"

My initial thoughts is that I shouldn't be using "this.m_switcher".

Could someone point me in the right direction for the implementation of the SuperSourceBoxIterator?

Code: Select all

                int Box1 = 1;
                long inputId = 1;
                IBMDSwitcherSuperSourceBoxIterator ssIterator = null;
                IntPtr ssIteratorPtr;
                Guid ssIteratorIID = typeof(IBMDSwitcherSuperSourceBoxIterator).GUID;
                this.m_switcher.CreateIterator(ref ssIteratorIID, out ssIteratorPtr);
                if (ssIteratorPtr != null)
                {
                    ssIterator = (IBMDSwitcherSuperSourceBoxIterator)Marshal.GetObjectForIUnknown(ssIteratorPtr);
                }

                if (ssIterator != null)
                {
                    IBMDSwitcherSuperSourceBox input;
                    ssIterator.Next(out input);
                    int BOXCount = 0;
                    while (input != null)
                    {
                            BOXCount++;
                            if (BOXCount == Box1)
                            {
                                IBMDSwitcherSuperSourceBox liveBox = (IBMDSwitcherSuperSourceBox)input;
                                liveBox.SetInputSource(inputId);
                                break;
                            }
                        ssIterator.Next(out input);
                    }
                }

You need to Query the SuperSource Input to pickup the SuperSource box iterator.

In the same way my example AUX code picks up the AUX Control interface from the Aux "Input", you pickup your iterator for supersource boxes from the SuperSource Input.

Thanks John. Will look at this again today.

Sorry for the previous post. Somehow it got posted before I was through.

I have tried to get iterate the Super Source Box with the following:

IBMDSwitcherSuperSourceBoxIterator ssIterator = null;
IntPtr ssIteratorPtr;
Guid ssIteratorIID = typeof(IBMDSwitcherSuperSourceBoxIterator).GUID;
m_SSource.CreateIterator(ref ssIteratorIID, out ssIteratorPtr);

Where m_SSource is a IBMDSwitcherInputSuperSource object.

I believe this is what John was talking about as the syntax worked well for the audio mixer. While there is no error in the development environment, when run I receive an access violation when the last line is run.

Accoding to the SDK document this seems correct. What have I missed?

Hi,
any luck figuring that out?
I could use a tip on how to set the source on a supersource box