FGFS-4.1/gr-air-modes
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Correctly return a zero timestamp tag instead of a null tag.

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This commit is contained in:
Nick Foster 2015-07-09 13:03:10 -07:00
parent c96dea7fa0
commit 953a7ddded
1 changed files with 5 additions and 4 deletions
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9
lib/preamble_impl.cc
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@ -98,9 +98,10 @@ static double correlate_preamble(const float *in, int samples_per_chip) {
}
static pmt::pmt_t tag_to_timestamp(gr::tag_t tstamp, uint64_t abs_sample_cnt, int rate) {
if(tstamp.key == NULL) return 0;
if(!pmt::is_symbol(tstamp.key)) return 0;
if(pmt::symbol_to_string(tstamp.key) != "rx_time") return 0;
pmt::pmt_t tstime = pmt::make_tuple(pmt::from_uint64(0), pmt::from_double(0));
if(tstamp.key == NULL) return tstime;
if(!pmt::is_symbol(tstamp.key)) return tstime;
if(pmt::symbol_to_string(tstamp.key) != "rx_time") return tstime;
//the timestamp tag has tstamp.offset, the sample index of the timestamp tag
//also tstamp.value, a pmt pair with (uint64, double) representing int and
@ -124,7 +125,7 @@ static pmt::pmt_t tag_to_timestamp(gr::tag_t tstamp, uint64_t abs_sample_cnt, in
abs_whole += 1.0f;
}
pmt::pmt_t tstime = pmt::make_tuple(pmt::from_uint64(abs_whole), pmt::from_double(abs_frac));
tstime = pmt::make_tuple(pmt::from_uint64(abs_whole), pmt::from_double(abs_frac));
return tstime;
}