Not sure about your TV model, but most Samsung televisions have discrete codes which will allow for direct access to the input. You should look into a Universal MX-3000 or an RTI t3 remote. you will need a pro for these, but will do excatly what you want it to do. With these remote you can have a macro programmed for each source.
For example when you press DVD the macro will run like this. TV on, DVD on, Receiver On? TV to HDMI input, Receiver to DVD input, Touchscreen page will change to DVD page all with a press of one button.