Quick Question on how to use AudioTransportSource in processBlock()

This is likely a SIMPLE question for you all (since I’m new):

I’ve loaded a file into an AudioTransportSource and I’m in the processBlock() function wanting to process that source.

To do so, I want to call transportSource.getNextAudioBlock(…), but that function takes a “const AudioSourceChannelInfo &” variable and the processBlock() function doesn’t provide that.

If I wasn’t making a VST but an App, the processNextBlock() does provide a AudioSourceChannelInfo, but the processBlock() does not.

MY QUESTION:
How do I get to process the AudioTransportSource inside of processBlock()

Can I create an AudioSourceChannelInfo like this?
juce::AudioSourceChannelInfo myInfo(buffer)