Remove portion of tagged stream

GNU Radio
1

Hello all,

Question 1:
I have another “Does this exist already” question. I’m using the
correlate
access code block to tag a stream of data. Is there a block that exists
that will identify a tag and then remove the next X items, where X is
user
defined?

I’m not looking to use the Header Payload/Demux for this, because the
specification I’m designing to does not call out a header and I need to
remain interoperable.

Question 2:
Assuming I have to write this block myself, I’d like some confirmation
of
my current thought process.

Since the input/output relationship is not constant, as I will be
removing
samples (decimating) sometimes but other times copying input to output
(sync), is the conclusion that I have to use a general block here
correct?

Question 3:
When using a general block, it is my responsibility to consume and
produce
everything. With this said, if I call produce(X) to place samples in the
output buffer, then what does the return statement do? If I return 8000,
what does this mean?

Thanks,
Rich

2

On Mon, Jun 22, 2015 at 4:09 PM, Richard B. [email protected]
wrote:

Is there a block that exists that will identify a tag and then remove the
next X items, where X is user defined?

No.

is the conclusion that I have to use a general block here correct?

Yes

if I call produce(X) to place samples in the output buffer, then what does
the return statement do? If I return 8000, what does this mean?

Use ‘return WORK_CALLED_PRODUCE’.

3

Thank you!

Rich

On Mon, Jun 22, 2015 at 4:16 PM, Johnathan C.
[email protected]