Re: [Discuss-gnuradio] Different input/output rate

[irene159]

Martin Dvh wrote:
> 
> Hi Holger,
>> The input of my signal block is a bytestream b. The output should
>> also be a bytestream, but with a different number of outgoing items(not a
>> multiple of b).
>> In other words, after the transformation of the inputstream some
>> extra-bytes
>> have to be appended.  
>> For example:
>>  
>> Input y Bytes   ------->   Output (y Bytes * x) + c ; where y and x are
>> integers
>> and c Overhead-Bytes: independent from input items
>> 
>> The number of input items is not fixed.
>> 
>> Is this possible or must the number of output items always be a multiple
>> of the
>> number of input items?
> Yes, this is possible.
> You have to extend from gr_block in stead of gr_sync_block.
> You have to implement your own forecast block and call consume_all
> yourself.
> 
> Look at the gr_simple_framer block. It does just this.
> (src/lib/general/gr_simple_framer.[cc,h,i)]
> 
> Greetings,
> Martin
> 
> 
> 
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> 
> 




Hi,

I have the same problem. I have already taken a look at gr_simple_framer,
but code seems slightly complicated. I would appreciate any
explanations/comments on how to code different input and output rates.

In the block I am coding the number of input items for an output item isn't
constant. How can I handle this?

Thanks,

Irene



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