Thanks a lot Martin.
Ok, now I can regulate the datastream, but one big problem has appeared.
How do I know when the last item of an inputstream is handled in the
general_work-function?
This is necessary because I want to add after the last item some bytes
and the number of incoming items is always unknown.
I made some tests and when I changed the amount of the bytes going into
my signal-block (coming from a file), I always got different chunks of
input items in my general_work-function.
The last chunk of input_items handled in "general_work" contains
sometimes 1 or 4 or 16 or more input_items (so 2^x).
How do I know when the last portion of input_items are handled in
"general_work"?
Is there a function to check this?
Is it maybe possible to send some outgoing items directly from the
forecast-function or from the deconstructor?
I hope you or someone else could help me!
Holger
Martin Dvh schrieb:
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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