[Discuss-gnuradio] How to use forecast()?

[Zohair]

Hello everybody,

I'm working on building a block that accepts many inputs (say n) and has one
output. For a single output item to be generated, 100 samples from each
input port should be taken. How can I use forecast() and general_work() to
serve my purpose? I read somewhere that we never call or modify the
parameters explicitly, the scheduler does this instead. But how does the
scheduler know that I need 100 samples exactly.

Any help is highly appreciated. 
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