Re: [Discuss-gnuradio] Question about tagged_stream_block

[bob wole]

Thanks Martin,

I know the packet size a priori but samples may drop due to overflows while flowgraph is running and could result in different packet size. Is there a way to solve this issue while using tagged_stream_block?

--

Bob

It'll crash. If you know your packet size a priori, you can tell the
scheduler to only provide multiples of a 1000 samples.

Cheers,
M

On 06/20/2016 07:17 AM, bob wole wrote:
> Hi,
> My  flowgraph contains a tagged_stream_block, B, and it has a
> length_tag_key, say "pkt_len". Each packet has a length of 1000 samples.
> The upstream block (A-->B) tags first sample with key "pkt_len" and
> value 1000 and then the upstream block tags sample number 901 with key
> "pkt_len" and value 1000 instead of tagging sample number 1001. This
> could happen in case of overflow and I know using receive tags that 100
> samples has been lost. So, samples from 901 to 1900 contains a new
> packet. Will the flowgraph work or will it crash?
>
> I want to write a block that processes exactly only 1000 samples, one
> packet, in a call to work. And the packets start from a specific time
> for example when the rx_time of the sample is mid of any second.
>
>
> --
> Bob