Add adaptive packet loss handling

clients/windows/VoiceCat.App/Forms/ChannelEditDialog.cs

@@ -26,6 +26,8 @@ public sealed class ChannelEditDialog : Form
     private NumericUpDown _numFrameMs = null!;
     private ComboBox _cboApplication = null!;
     private CheckBox _chkFec = null!;
+    private CheckBox _chkAutomaticLoss = null!;
+    private ComboBox _cboLossSpeed = null!;
     private NumericUpDown _numExpectedLoss = null!;
     private CheckBox _chkDtx = null!;
     private CheckBox _chkDred = null!;
@@ -33,11 +35,14 @@ public sealed class ChannelEditDialog : Form
 
     public ChannelEditInfo? Result { get; private set; }
 
-    public ChannelEditDialog(IEnumerable<ChannelInfo> channels, ChannelEditInfo? existing = null)
+    private readonly bool _supportsAdaptivePacketLoss;
+
+    public ChannelEditDialog(IEnumerable<ChannelInfo> channels, ChannelEditInfo? existing = null, bool supportsAdaptivePacketLoss = true)
     {
         _isCreate = existing is null;
         _editingId = existing?.Id ?? 0;
         _channels = channels.Where(c => c.Id != _editingId).ToList();
+        _supportsAdaptivePacketLoss = supportsAdaptivePacketLoss;
 
         Text = _isCreate ? "Create channel" : "Edit channel";
         FormBorderStyle = FormBorderStyle.FixedDialog;
@@ -269,6 +274,31 @@ public sealed class ChannelEditDialog : Form
         page.Controls.Add(_cboApplication);
         y += 34;
 
+        _chkAutomaticLoss = new CheckBox
+        {
+            Text = "&Automatic packet loss",
+            Location = new Point(inputX, y),
+            AutoSize = true,
+            Checked = audio.PacketLossMode != VcPacketLossMode.Manual,
+            Enabled = _supportsAdaptivePacketLoss,
+            TabIndex = 15,
+        };
+        page.Controls.Add(_chkAutomaticLoss);
+        y += 30;
+
+        AddLabel(page, "Adaptation &speed:", 12, y, labelWidth);
+        _cboLossSpeed = new ComboBox
+        {
+            Location = new Point(inputX, y - 2),
+            Size = new Size(160, 23),
+            DropDownStyle = ComboBoxStyle.DropDownList,
+            TabIndex = 16,
+        };
+        _cboLossSpeed.Items.AddRange(["Fast", "Balanced", "Stable"]);
+        _cboLossSpeed.SelectedIndex = audio.PacketLossMode == VcPacketLossMode.Manual ? 1 : (int)audio.PacketLossMode - 1;
+        page.Controls.Add(_cboLossSpeed);
+        y += 34;
+
         AddLabel(page, "Expected packet loss (%):", 12, y, labelWidth);
         _numExpectedLoss = new NumericUpDown
         {
@@ -277,9 +307,16 @@ public sealed class ChannelEditDialog : Form
             Minimum = 0,
             Maximum = 100,
             Value = audio.ExpectedPacketLoss,
-            TabIndex = 15,
+            TabIndex = 17,
         };
         page.Controls.Add(_numExpectedLoss);
+        void UpdateLossControls()
+        {
+            _numExpectedLoss.Enabled = !_chkAutomaticLoss.Checked;
+            _cboLossSpeed.Enabled = _supportsAdaptivePacketLoss && _chkAutomaticLoss.Checked;
+        }
+        _chkAutomaticLoss.CheckedChanged += (_, _) => UpdateLossControls();
+        UpdateLossControls();
         y += 34;
 
         AddLabel(page, "Com&plexity (0–10):", 12, y, labelWidth);
@@ -290,7 +327,7 @@ public sealed class ChannelEditDialog : Form
             Minimum = 0,
             Maximum = 10,
             Value = audio.Complexity,
-            TabIndex = 16,
+            TabIndex = 18,
         };
         page.Controls.Add(_numComplexity);
         y += 34;
@@ -301,7 +338,7 @@ public sealed class ChannelEditDialog : Form
             Location = new Point(inputX, y),
             AutoSize = true,
             Checked = audio.Fec,
-            TabIndex = 17,
+            TabIndex = 19,
         };
         page.Controls.Add(_chkFec);
         y += 28;
@@ -312,7 +349,7 @@ public sealed class ChannelEditDialog : Form
             Location = new Point(inputX, y),
             AutoSize = true,
             Checked = audio.Dtx,
-            TabIndex = 18,
+            TabIndex = 20,
         };
         page.Controls.Add(_chkDtx);
         y += 28;
@@ -323,7 +360,7 @@ public sealed class ChannelEditDialog : Form
             Location = new Point(inputX, y),
             AutoSize = true,
             Checked = audio.Dred,
-            TabIndex = 19,
+            TabIndex = 21,
         };
         page.Controls.Add(_chkDred);
     }
@@ -375,7 +412,8 @@ public sealed class ChannelEditDialog : Form
             ExpectedPacketLoss: (uint)_numExpectedLoss.Value,
             Dtx: _chkDtx.Checked,
             Complexity: (uint)_numComplexity.Value,
-            Dred: _chkDred.Checked);
+            Dred: _chkDred.Checked,
+            PacketLossMode: _chkAutomaticLoss.Checked ? (VcPacketLossMode)(_cboLossSpeed.SelectedIndex + 1) : VcPacketLossMode.Manual);
 
         Result = new ChannelEditInfo(
             Id: _editingId,

clients/windows/VoiceCat.App/Forms/MainForm.cs

@@ -1132,7 +1132,7 @@ public partial class MainForm : Form
 
     private void CreateChannel()
     {
-        using var dlg = new ChannelEditDialog(_channels);
+        using var dlg = new ChannelEditDialog(_channels, supportsAdaptivePacketLoss: _client.SupportsAdaptivePacketLoss);
         if (dlg.ShowDialog(this) != DialogResult.OK || dlg.Result is null) return;
         _client.CreateChannel(dlg.Result);
     }
@@ -1148,7 +1148,7 @@ public partial class MainForm : Form
             channel.PasswordProtected, null, channel.MaxUsers, channel.SortOrder,
             channel.Audio);
 
-        using var dlg = new ChannelEditDialog(_channels, editInfo);
+        using var dlg = new ChannelEditDialog(_channels, editInfo, _client.SupportsAdaptivePacketLoss);
         if (dlg.ShowDialog(this) != DialogResult.OK || dlg.Result is null) return;
         _client.EditChannel(dlg.Result);
     }

clients/windows/VoiceCat.Windows/Administration.cs

@@ -27,6 +27,7 @@ public sealed partial class VoiceCatClient
         Id = info.Id, ParentId = info.ParentId, Name = info.Name, Topic = info.Topic, MaxUsers = info.MaxUsers, Order = info.SortOrder,
         Audio = new() { Codec = info.Audio.Codec, Mode = info.Audio.Stereo ? ChannelMode.ModeStereo : ChannelMode.ModeMono, SampleRate = info.Audio.SampleRate,
             BitrateBps = info.Audio.BitrateBps, FrameMs = info.Audio.FrameMs, Application = (OpusApplication)info.Audio.Application, Complexity = info.Audio.Complexity,
-            Fec = info.Audio.Fec, ExpectedPacketLoss = info.Audio.ExpectedPacketLoss, Dtx = info.Audio.Dtx, Dred = info.Audio.Dred }
+            Fec = info.Audio.Fec, ExpectedPacketLoss = info.Audio.ExpectedPacketLoss, Dtx = info.Audio.Dtx, Dred = info.Audio.Dred,
+            PacketLossMode = (PacketLossMode)info.Audio.PacketLossMode }
     };
 }

clients/windows/VoiceCat.Windows/Enums.cs

@@ -1,6 +1,8 @@
 // Windows-facing state and command values used by the WinForms application.
 namespace VoiceCat.Windows;
 
+public enum VcPacketLossMode { Manual, AutoFast, AutoBalanced, AutoStable }
+
 public enum VcResult
 {
     Ok = 0,

clients/windows/VoiceCat.Windows/Models.cs

@@ -73,4 +73,5 @@ public sealed record AudioConfigInfo(
     uint ExpectedPacketLoss,
     bool Dtx,
     uint Complexity,
-    bool Dred);
+    bool Dred,
+    VcPacketLossMode PacketLossMode = VcPacketLossMode.Manual);

clients/windows/VoiceCat.Windows/VoiceCatClient.cs

@@ -87,6 +87,7 @@ public sealed partial class VoiceCatClient : IDisposable
         StopDevices(); core.DisconnectAsync().GetAwaiter().GetResult(); return VcResult.Ok;
     }
     public string GetServerIdentityDisplay() => core.ServerHello is { } hello ? Convert.ToHexString(hello.ServerIdentityFingerprint.Span) : "";
+    public bool SupportsAdaptivePacketLoss => core.SupportsAdaptivePacketLoss;
 
     public void PumpEvents()
     {
@@ -182,7 +183,7 @@ public sealed partial class VoiceCatClient : IDisposable
     public List<DeviceInfo> ListDevices(VcDeviceKind kind) => backend?.Enumerate(kind == VcDeviceKind.Input).Select(d => new DeviceInfo(d.Id, d.Name, d.IsDefault)).ToList() ?? [];
     public static string VersionString => "VoiceCat managed core 0.1.0 (protocol v2)";
     public static string ResultString(VcResult result) => result.ToString();
-    private static AudioConfigInfo Audio(AudioConfig a) => new(a.Codec, a.Mode == ChannelMode.ModeStereo, a.SampleRate, a.BitrateBps, a.FrameMs, (uint)a.Application, a.Fec, a.ExpectedPacketLoss, a.Dtx, a.Complexity, a.Dred);
+    private static AudioConfigInfo Audio(AudioConfig a) => new(a.Codec, a.Mode == ChannelMode.ModeStereo, a.SampleRate, a.BitrateBps, a.FrameMs, (uint)a.Application, a.Fec, a.ExpectedPacketLoss, a.Dtx, a.Complexity, a.Dred, (VcPacketLossMode)a.PacketLossMode);
 
     private void StopDevices()
     {