diff options
Diffstat (limited to 'host/lib/rfnoc/ddc_block_control.cpp')
| -rw-r--r-- | host/lib/rfnoc/ddc_block_control.cpp | 27 |
1 files changed, 25 insertions, 2 deletions
diff --git a/host/lib/rfnoc/ddc_block_control.cpp b/host/lib/rfnoc/ddc_block_control.cpp index 8ac411a53..9f90980d9 100644 --- a/host/lib/rfnoc/ddc_block_control.cpp +++ b/host/lib/rfnoc/ddc_block_control.cpp @@ -314,7 +314,18 @@ private: if (not decim.is_valid()) { decim = coerce_decim(samp_rate_in.get() / samp_rate_out.get()); } - samp_rate_out = samp_rate_in.get() / decim.get(); + const double new_samp_rate_out = samp_rate_in.get() / decim.get(); + // Only update the samp_rate_out if the new value is not the same + // frequency. However, we still want to call the operator= to make + // sure metadata gets handled + if (samp_rate_out.is_valid()) { + samp_rate_out = (uhd::math::frequencies_are_equal( + samp_rate_out, new_samp_rate_out)) + ? samp_rate_out.get() + : new_samp_rate_out; + } else { + samp_rate_out = new_samp_rate_out; + } RFNOC_LOG_TRACE("New samp_rate_out is " << samp_rate_out.get()); // If the input rate changes, we need to update the DDS, too, // since it works on frequencies normalized by the input rate. @@ -343,7 +354,19 @@ private: // However, the decim resolver will set the output rate based // on the input rate, so we need to force the input rate first. if (decim.is_dirty()) { - samp_rate_in = samp_rate_out.get() * decim.get(); + const double new_samp_rate_in = samp_rate_out.get() * decim.get(); + // Only update the samp_rate_in if the new value is not the same + // frequency. However, we still want to call the operator= to make + // sure metadata gets handled + if (samp_rate_in.is_valid()) { + samp_rate_in = (uhd::math::frequencies_are_equal( + samp_rate_in, new_samp_rate_in)) + ? samp_rate_in.get() + : new_samp_rate_in; + } else { + samp_rate_in = new_samp_rate_in; + } + RFNOC_LOG_TRACE("New samp_rate_in is " << samp_rate_in.get()); } } scaling_out = scaling_in.get() * _residual_scaling.at(chan); |