Re: How to detect that the input item is empty?

[Marcus Müller]

Linge,

> How to judge that this is the last input?

There's no way.

seriously, we discussed this yesterday. It's a bit tiring to explain things in chat, and 
then say exactly the same thing next day on the mailing list.

You cann't do it this way. Your framing must come from where you read the data.
By far the easiest way to achieve that is by writing a Python block that reads a file, 
adds a kind of header that says how many bytes of useful data will come, and then output 
the file, and add the trailing zeros.

Best regards,
Marcus

On 13.12.21 04:08, 能书能言 wrote:
> Hi,all
> I want to know how a block judges that input has been stopped? For example, my source has 
> a total of 1000 samples, the number of input buffers is different each time, it may be 
> 500, 100, 68... etc. When the input buffer has enough input, the work function will be called,
> but when the last set of data of 1000 samples has reached the input buffer, there will be 
> no more input, and no more work functions will be called. When processing the last set of 
> input data, I need to be able to judge that this is the last time the work function is 
> called, and there will be no more input next, and then I will perform zero padding during 
> the call to the work function this time.
> How to judge that this is the last input? Thanks in advance.
> Best Regards,
> linge93