[feat](trx-rs): add WFM RDS and playback controls

Co-authored-by: OpenAI Codex <codex@openai.com>
Signed-off-by: Stan Grams <sjg@haxx.space>

src/trx-protocol/src/codec.rs

@@ -297,6 +297,7 @@ mod tests {
                 bandwidth_hz: 3000,
                 fir_taps: 64,
                 cw_center_hz: 700,
+                wfm_deemphasis_us: 75,
             }),
             ..minimal_snapshot()
         })
@@ -332,6 +333,7 @@ mod tests {
                 bandwidth_hz: 12000,
                 fir_taps: 128,
                 cw_center_hz: 700,
+                wfm_deemphasis_us: 50,
             }),
             ..minimal_snapshot()
         };
@@ -340,6 +342,7 @@ mod tests {
         let f = decoded.filter.expect("filter should round-trip");
         assert_eq!(f.bandwidth_hz, 12000);
         assert_eq!(f.fir_taps, 128);
+        assert_eq!(f.wfm_deemphasis_us, 50);
     }
 
     fn minimal_snapshot() -> trx_core::rig::state::RigSnapshot {

src/trx-protocol/src/mapping.rs

@@ -48,6 +48,9 @@ pub fn client_command_to_rig(cmd: ClientCommand) -> RigCommand {
         ClientCommand::ResetWsprDecoder => RigCommand::ResetWsprDecoder,
         ClientCommand::SetBandwidth { bandwidth_hz } => RigCommand::SetBandwidth(bandwidth_hz),
         ClientCommand::SetFirTaps { taps } => RigCommand::SetFirTaps(taps),
+        ClientCommand::SetWfmDeemphasis { deemphasis_us } => {
+            RigCommand::SetWfmDeemphasis(deemphasis_us)
+        }
         ClientCommand::GetSpectrum => RigCommand::GetSpectrum,
     }
 }
@@ -89,6 +92,9 @@ pub fn rig_command_to_client(cmd: RigCommand) -> ClientCommand {
         RigCommand::ResetWsprDecoder => ClientCommand::ResetWsprDecoder,
         RigCommand::SetBandwidth(bandwidth_hz) => ClientCommand::SetBandwidth { bandwidth_hz },
         RigCommand::SetFirTaps(taps) => ClientCommand::SetFirTaps { taps },
+        RigCommand::SetWfmDeemphasis(deemphasis_us) => {
+            ClientCommand::SetWfmDeemphasis { deemphasis_us }
+        }
         RigCommand::GetSpectrum => ClientCommand::GetSpectrum,
     }
 }

src/trx-protocol/src/types.rs

@@ -38,6 +38,7 @@ pub enum ClientCommand {
     ResetWsprDecoder,
     SetBandwidth { bandwidth_hz: u32 },
     SetFirTaps { taps: u32 },
+    SetWfmDeemphasis { deemphasis_us: u32 },
     GetSpectrum,
 }