feat: default meters + update state on link

src/dsp408/client/dsp408.rs

@@ -10,8 +10,7 @@ use std::{
 use crate::{
     common::errors::DSPError,
     dsp408::{
-        default::default_input_meters,
-        default::default_output_meters,
+        default::{default_input_meters, default_output_meters},
         default_dsp_state,
         mapper::{
             self,
@@ -19,7 +18,7 @@ use crate::{
             response::map_response,
         },
         protocol::{commands, config::decode_config, frame::extract_frame},
-        types::{self},
+        types::self,
     },
 };
 
@@ -1514,9 +1513,6 @@ impl DSP408 {
                 if !self.request_acknowledgement()? {
                     return Ok(false);
                 }
-
-                let config = self.read_config_state()?;
-                self.state_mut().current_config = config;
             }
 
             types::DSPMode::Demo => {
@@ -1528,6 +1524,54 @@ impl DSP408 {
             }
         }
 
+        let state = self.state_mut();
+
+        match source {
+            types::Channel::Input(s) => {
+                let input_destinations: Vec<types::InputChannel> = destinations
+                    .iter()
+                    .filter_map(|destination| match destination {
+                        types::Channel::Input(input) => Some(*input),
+                        types::Channel::Output(_) => None,
+                    })
+                    .collect();
+
+                let states = &mut state.current_config.input_states;
+
+                // Remove the source and destinations from all existing links.
+                for channel_state in states.values_mut() {
+                    channel_state
+                        .linked_channels
+                        .retain(|channel| *channel != s && !input_destinations.contains(channel));
+                }
+
+                // Link source -> destinations.
+                states.get_mut(&s).unwrap().linked_channels = input_destinations;
+            }
+
+            types::Channel::Output(s) => {
+                let output_destinations: Vec<types::OutputChannel> = destinations
+                    .iter()
+                    .filter_map(|destination| match destination {
+                        types::Channel::Output(output) => Some(*output),
+                        types::Channel::Input(_) => None,
+                    })
+                    .collect();
+
+                let states = &mut state.current_config.output_states;
+
+                // Remove the source and destinations from all existing links.
+                for channel_state in states.values_mut() {
+                    channel_state
+                        .linked_channels
+                        .retain(|channel| *channel != s && !output_destinations.contains(channel));
+                }
+
+                // Link source -> destinations.
+                states.get_mut(&s).unwrap().linked_channels = output_destinations;
+            }
+        }
+
         Ok(true)
     }
 

src/dsp408/default.rs

@@ -75,16 +75,44 @@ fn default_config() -> DSPConfigState {
 
 fn default_input_states() -> HashMap<InputChannel, InputChannelState> {
     [
-        (InputChannel::InA, default_input_channel_state("In A")),
-        (InputChannel::InB, default_input_channel_state("In B")),
-        (InputChannel::InC, default_input_channel_state("In C")),
-        (InputChannel::InD, default_input_channel_state("In D")),
+        (
+            InputChannel::InA,
+            default_input_channel_state("In A", false),
+        ),
+        (InputChannel::InB, default_input_channel_state("In B", true)),
+        (
+            InputChannel::InC,
+            default_input_channel_state("In C", false),
+        ),
+        (
+            InputChannel::InD,
+            default_input_channel_state("In D", false),
+        ),
     ]
     .into_iter()
     .collect()
 }
 
-fn default_input_channel_state(name: &str) -> InputChannelState {
+fn default_input_channel_state(name: &str, a: bool) -> InputChannelState {
+    if a {
+        return InputChannelState {
+            name: name.to_string(),
+
+            gain: 0.0,
+            phase_inverted: false,
+            delay: 0.0,
+
+            gate: default_gate(),
+            geq: default_graphic_eq(),
+            peq_chain: default_peq_chain(),
+            crossover: default_crossover_filters(),
+
+            linked_channels: vec![InputChannel::InA],
+            // linked_channels: Vec::new(),
+            mute: false,
+        };
+    }
+
     InputChannelState {
         name: name.to_string(),