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[fix](trx-vdes): preserve higher SDR iq rate

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Keep the SoapySDR VDES and MARINE IQ path at a much higher channel sample rate instead of collapsing toward the normal audio rate, so the decoder receives usable complex baseband for the 76.8 ksps VDES signal.

Co-authored-by: OpenAI Codex <codex@openai.com>
Signed-off-by: Stanislaw Grams <stanislawgrams@gmail.com>
This commit is contained in:
Stan Grams
2026-03-03 01:13:06 +01:00
parent 5174e1ab73
commit 10f5a147dc
1 changed files with 5 additions and 5 deletions
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src/trx-server/trx-backend/trx-backend-soapysdr/src/dsp/channel.rs
+5 -5
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@@ -113,10 +113,10 @@ impl ChannelDsp {
return (1, audio_sample_rate.max(1));
}
let target_rate = if *mode == RigMode::WFM {
audio_bandwidth_hz.max(audio_sample_rate.saturating_mul(4))
} else {
audio_sample_rate.max(1)
let target_rate = match mode {
RigMode::WFM => audio_bandwidth_hz.max(audio_sample_rate.saturating_mul(4)),
RigMode::VDES | RigMode::MARINE => audio_sample_rate.max(96_000),
_ => audio_sample_rate.max(1),
};
let decim_factor = (sdr_sample_rate / target_rate.max(1)).max(1) as usize;
let channel_sample_rate = (sdr_sample_rate / decim_factor as u32).max(1);
@@ -366,7 +366,7 @@ impl ChannelDsp {
self.scratch_decimated
.reserve(capacity - self.scratch_decimated.capacity());
}
if self.mode == RigMode::VDES && self.iq_tx.receiver_count() > 0 {
if matches!(self.mode, RigMode::VDES | RigMode::MARINE) && self.iq_tx.receiver_count() > 0 {
self.scratch_iq_tap.clear();
if self.scratch_iq_tap.capacity() < capacity {
self.scratch_iq_tap