hackmaster/Substation
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Add live audio capture via WASAPI loopback

Browse Source 
- LiveCapture.cs: real-time WASAPI loopback capture with rolling buffer
  and continuous FFT analysis, enqueues WaveFrames at ~10Hz
- MusicAnalyzer.cs: refactored ExtractFeatures/MapPitchToPeriod/BuildWaveFrame
  as public reusable methods with sampleRate parameter
- MainForm: audio device selector (defaults to system default), Live button
  starts/stops capture, Stop All stops live too
- Adaptive normalization (running max with slow decay) for live volume changes
This commit is contained in:
Mute
2026-08-08 19:20:46 +00:00
parent 933c7ede38
commit ccc5093ee2
3 changed files with 330 additions and 84 deletions
Download Patch File Download Diff File Expand all files Collapse all files
MainForm.cs
+119 -26
View File
@@ -1,6 +1,7 @@
using System.ComponentModel;
using System.Drawing.Drawing2D;
using System.Diagnostics;
using NAudio.CoreAudioApi;
using NAudio.Wave;
namespace Substation;
@@ -48,10 +49,15 @@ public class MainForm : Form
string _trayState = "";
readonly Button _btnMusic;
readonly Button _btnLive;
readonly Label _lblTrack;
readonly Label _lblAudioDev;
readonly ComboBox _cboAudioDev;
bool _isMusicRunning;
bool _isLiveRunning;
WaveOutEvent? _audioOut;
Stopwatch? _musicStopwatch;
LiveCapture? _liveCapture;
public MainForm(CoyoteDevice device, State state, Server server)
{
@@ -61,7 +67,7 @@ public class MainForm : Form
_loopCts = new CancellationTokenSource();
Text = $"Substation {typeof(MainForm).Assembly.GetName().Version}";
ClientSize = new Size(420, 425);
ClientSize = new Size(420, 450);
FormBorderStyle = FormBorderStyle.FixedSingle;
MaximizeBox = false;
StartPosition = FormStartPosition.CenterScreen;
@@ -117,30 +123,52 @@ public class MainForm : Form
{
Text = "Test",
Location = new Point(16, 96),
Size = new Size(100, 32)
Size = new Size(80, 32)
};
_btnTest.Click += OnTest;
_btnMusic = new Button
{
Text = "Music",
Location = new Point(130, 96),
Size = new Size(100, 32)
Location = new Point(104, 96),
Size = new Size(80, 32)
};
_btnMusic.Click += OnMusic;
_btnLive = new Button
{
Text = "Live",
Location = new Point(192, 96),
Size = new Size(80, 32)
};
_btnLive.Click += OnLive;
_btnStop = new Button
{
Text = "Stop All",
Location = new Point(244, 96),
Size = new Size(100, 32)
Location = new Point(280, 96),
Size = new Size(80, 32)
};
_btnStop.Click += OnStop;
_lblAudioDev = new Label
{
Text = "Audio:",
Location = new Point(16, 134),
Size = new Size(40, 20)
};
_cboAudioDev = new ComboBox
{
DropDownStyle = ComboBoxStyle.DropDownList,
Location = new Point(60, 132),
Size = new Size(344, 22)
};
PopulateAudioDevices();
_lblTrack = new Label
{
Text = "",
Location = new Point(16, 134),
Location = new Point(16, 158),
Size = new Size(388, 16),
ForeColor = Color.DimGray
};
@@ -148,37 +176,37 @@ public class MainForm : Form
_lblSendA = new Label
{
Text = "Send A",
Location = new Point(16, 160),
Location = new Point(16, 184),
Size = new Size(48, 20),
Font = new Font(Font.FontFamily, 9, FontStyle.Bold)
};
_heatA = new HeatMap(60)
{
Location = new Point(72, 158),
Location = new Point(72, 182),
Size = new Size(332, 22)
};
_lblSendB = new Label
{
Text = "Send B",
Location = new Point(16, 188),
Location = new Point(16, 212),
Size = new Size(48, 20),
Font = new Font(Font.FontFamily, 9, FontStyle.Bold)
};
_heatB = new HeatMap(60)
{
Location = new Point(72, 186),
Location = new Point(72, 210),
Size = new Size(332, 22)
};
_lblRecvA = new Label
{
Text = "Recv A",
Location = new Point(16, 216),
Location = new Point(16, 240),
Size = new Size(48, 20),
Font = new Font(Font.FontFamily, 9, FontStyle.Bold)
};
_gaugeRecvA = new ProgressBar
{
Location = new Point(72, 216),
Location = new Point(72, 240),
Size = new Size(332, 20),
Minimum = 0,
Maximum = 200,
@@ -187,13 +215,13 @@ public class MainForm : Form
_lblRecvB = new Label
{
Text = "Recv B",
Location = new Point(16, 242),
Location = new Point(16, 266),
Size = new Size(48, 20),
Font = new Font(Font.FontFamily, 9, FontStyle.Bold)
};
_gaugeRecvB = new ProgressBar
{
Location = new Point(72, 242),
Location = new Point(72, 266),
Size = new Size(332, 20),
Minimum = 0,
Maximum = 200,
@@ -203,13 +231,13 @@ public class MainForm : Form
_lblLimitA = new Label
{
Text = "Lim A",
Location = new Point(16, 274),
Location = new Point(16, 298),
Size = new Size(40, 20),
Font = new Font(Font.FontFamily, 9, FontStyle.Bold)
};
_limitBarA = new TrackBar
{
Location = new Point(60, 270),
Location = new Point(60, 294),
Size = new Size(220, 45),
Minimum = 0,
Maximum = 200,
@@ -221,14 +249,14 @@ public class MainForm : Form
_lblLimitValA = new Label
{
Text = "30",
Location = new Point(286, 274),
Location = new Point(286, 298),
Size = new Size(32, 20),
TextAlign = ContentAlignment.MiddleRight
};
_chkScaleA = new CheckBox
{
Text = "Scale",
Location = new Point(320, 274),
Location = new Point(320, 298),
Size = new Size(76, 24),
Checked = false
};
@@ -237,13 +265,13 @@ public class MainForm : Form
_lblLimitB = new Label
{
Text = "Lim B",
Location = new Point(16, 322),
Location = new Point(16, 346),
Size = new Size(40, 20),
Font = new Font(Font.FontFamily, 9, FontStyle.Bold)
};
_limitBarB = new TrackBar
{
Location = new Point(60, 318),
Location = new Point(60, 342),
Size = new Size(220, 45),
Minimum = 0,
Maximum = 200,
@@ -255,21 +283,21 @@ public class MainForm : Form
_lblLimitValB = new Label
{
Text = "30",
Location = new Point(286, 322),
Location = new Point(286, 346),
Size = new Size(32, 20),
TextAlign = ContentAlignment.MiddleRight
};
_chkScaleB = new CheckBox
{
Text = "Scale",
Location = new Point(320, 322),
Location = new Point(320, 346),
Size = new Size(76, 24),
Checked = false
};
_chkScaleB.CheckedChanged += OnLimitChanged;
OnLimitChanged(null, EventArgs.Empty);
Controls.AddRange(new Control[] { _lblBle, _lblWs, _lblDeviceName, _txtDeviceName, _btnConnect, _chkSwap, _btnTest, _btnMusic, _btnStop, _lblTrack, _lblSendA, _heatA, _lblSendB, _heatB, _lblRecvA, _gaugeRecvA, _lblRecvB, _gaugeRecvB, _lblLimitA, _limitBarA, _lblLimitValA, _chkScaleA, _lblLimitB, _limitBarB, _lblLimitValB, _chkScaleB });
Controls.AddRange(new Control[] { _lblBle, _lblWs, _lblDeviceName, _txtDeviceName, _btnConnect, _chkSwap, _btnTest, _btnMusic, _btnLive, _btnStop, _lblAudioDev, _cboAudioDev, _lblTrack, _lblSendA, _heatA, _lblSendB, _heatB, _lblRecvA, _gaugeRecvA, _lblRecvB, _gaugeRecvB, _lblLimitA, _limitBarA, _lblLimitValA, _chkScaleA, _lblLimitB, _limitBarB, _lblLimitValB, _chkScaleB });
// Tray icon — three cached variants: neutral=gray, active=gold, hot=red-orange
_iconNeutral = CreateVoltageIcon(Color.Gray);
@@ -437,8 +465,9 @@ public class MainForm : Form
void RefreshButtonStates()
{
_btnTest.Enabled = !_server.HasClient && !IsTestRunning;
_btnMusic.Enabled = !_server.HasClient && !_isMusicRunning;
_btnTest.Enabled = !_server.HasClient && !IsTestRunning && !_isMusicRunning && !_isLiveRunning;
_btnMusic.Enabled = !_server.HasClient && !_isMusicRunning && !IsTestRunning && !_isLiveRunning;
_btnLive.Enabled = !_server.HasClient && !_isLiveRunning && !IsTestRunning && !_isMusicRunning;
_btnStop.Enabled = true;
}
@@ -451,6 +480,10 @@ public class MainForm : Form
var elapsed = _musicStopwatch.Elapsed;
_lblTrack.Text = $"Playing {elapsed:mm\\:ss} / {_musicTotalTime:mm\\:ss} {Path.GetFileName(_musicFilePath)}";
}
else if (_isLiveRunning)
{
_lblTrack.Text = "Live capture";
}
UpdateTrayIcon();
}
@@ -516,6 +549,7 @@ public class MainForm : Form
void OnStop(object? sender, EventArgs e)
{
StopMusic();
StopLive();
_state.SetStrength('A', 0);
_state.SetStrength('B', 0);
_state.Stop('A');
@@ -639,6 +673,65 @@ public class MainForm : Form
}
}
void PopulateAudioDevices()
{
using var enumerator = new MMDeviceEnumerator();
var defaultDev = enumerator.GetDefaultAudioEndpoint(DataFlow.Render, Role.Console);
var devices = enumerator.EnumerateAudioEndPoints(DataFlow.Render, DeviceState.Active);
_cboAudioDev.Items.Clear();
int defaultIdx = 0;
for (int i = 0; i < devices.Count; i++)
{
_cboAudioDev.Items.Add(devices[i]);
if (devices[i].ID == defaultDev.ID)
defaultIdx = i;
}
_cboAudioDev.SelectedIndex = defaultIdx;
}
void OnLive(object? sender, EventArgs e)
{
if (_isLiveRunning || _server.HasClient) return;
if (_cboAudioDev.SelectedItem is not MMDevice dev) return;
_isLiveRunning = true;
_btnLive.Enabled = false;
_lblTrack.Text = "Starting live capture...";
_state.SetStrength('A', 60);
_state.SetStrength('B', 60);
_state.Stop('A');
_state.Stop('B');
_liveCapture = new LiveCapture(_state, dev);
_liveCapture.Stopped += () => BeginInvoke(StopLive);
_liveCapture.Start();
_lblTrack.Text = "Live capture";
RefreshButtonStates();
}
void StopLive()
{
if (_liveCapture != null)
{
try { _liveCapture.Stop(); } catch { }
try { _liveCapture.Dispose(); } catch { }
_liveCapture = null;
}
if (_isLiveRunning)
{
_isLiveRunning = false;
if (!IsDisposed)
{
_lblTrack.Text = "";
RefreshButtonStates();
}
}
}
void UpdateTrayIcon()
{
var newState = _state.IsSignaling ? "hot"