Frame poll callback. This returns the number of immediately available samples. It should return a positive value if the next request_frame() is guaranteed to return one frame (with no delay).
Defaults to just calling the source poll_frame() method.
Output pads only.
See Implementation
Frame poll callback. This returns the number of immediately available samples. It should return a positive value if the next request_frame() is guaranteed to return one frame (with no delay).
Defaults to just calling the source poll_frame() method.
Output pads only.