Re: [Discuss-gnuradio] recovering timing after overflow

[Josh Blum]

On 10/26/2011 08:23 AM, Juha Vierinen wrote:
> If I understand correctly, the sample count is:
> 
> const uint64_t count = gr_tags::get_nitems(rx_time_tag);

Correct, that will work. Just so you know, the tags API changed in
master to be more object oriented, so if you are on master, its
my_tag.offset. But yes, this is the same call.

> This determines the index of the sample coming into work, which has a
> new time because of overflow.
> 

The "uint64_t count" is the absolute index of the tag/timestamp. The
absolute index of a sample can be calculated as this->nitems_read(0) +
relative_offset

Where relative_offset is the offset of the sample in your input buffer
in the current call to work.

-josh