Consider a flow graph like: http://i.imgur.com/bNa6YuQ.png
Message source produces a short message. Period is quite long. Thus, There should be a long idle time. I'd like to build a block 'pad idle'. The block pad a predefined sequence if the upstream block gives nothing. I think a prototype would be: https://gist.github.com/gsongsong/d40b85a76ab8e80ae468#file-gistfile1-txt-L11 By setting the number of required items to zero in forecast(), general_work() will be called even there is no items received. And general work() checks the ninput_items and if it is zero, generates some idle-padding samples/patterns. Otherwise, it just handles and passess a message/samples to downstream. But it's just my thought. There may be a couple of considerations. 1. Is it allowed to forecast zero item? And does it behave as I expect? 2. If forecasting zero item is possible, willl general_work() be called extremely frequently so that other blocks are prevented from being called? Regards, Jeon.
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