signal callback delegate or function to connect
void callback(uint length, gstapp.app_src.AppSrc appSrc)
length the amount of bytes needed. (optional)
appSrc the instance the signal is connected to (optional)
Yes.After to execute callback after default handler, No.After to execute before (default)
Signal ID
Connect to NeedData signal.
Signal that the source needs more data. In the callback or from another thread you should call push-buffer or end-of-stream.
length is just a hint and when it is set to -1, any number of bytes can be pushed into appsrc.
You can call push-buffer multiple times until the enough-data signal is fired.