Add *ref as a new reference to formats.
That is the pointers will point like in the ascii art below:
________
|formats |<--------.
| ____ | ____|___________________
| |refs| | | __|_
| |* * | | | | | | AVFilterLink
| |* *--------->|*ref|
| |____| | | |____|
|________| |________________________
Add *ref as a new reference to formats. That is the pointers will point like in the ascii art below: ________ |formats |<--------. | ____ | ____|___________________ | |refs| | | __|_ | |* * | | | | | | AVFilterLink | |* *--------->|*ref| | |____| | | |____| |________| |________________________