Toak/Audio/AudioRecorder.cs

using System.Diagnostics;

using Toak.Core;
using Toak.IO;

namespace Toak.Audio;

public static class AudioRecorder
{
    private static readonly string WavPath = Path.Combine(Path.GetTempPath(), "toak_recording.wav");

    public static string GetWavPath() => WavPath;

    public static void StartRecording()
    {
        if (File.Exists(WavPath))
        {
            File.Delete(WavPath);
        }

        var pInfo = new ProcessStartInfo
        {
            FileName = "ffmpeg",
            Arguments = $"-f alsa -i default -y {WavPath}",
            UseShellExecute = false,
            CreateNoWindow = true,
            RedirectStandardOutput = true,
            RedirectStandardError = true
        };

        var process = Process.Start(pInfo);
        if (process != null)
        {
            StateTracker.SetRecording(process.Id);
            Notifications.Notify("Recording Started");
        }
    }

    public static void StopRecording()
    {
        var pid = StateTracker.GetRecordingPid();
        if (pid.HasValue)
        {
            try
            {
                var process = Process.GetProcessById(pid.Value);
                if (!process.HasExited)
                {
                    // Send gracefully? Process.Kill on linux sends SIGKILL by default.
                    // But ffmpeg can sometimes handle SIGINT or SIGTERM if we use alternative tools or Process.Kill.
                    // Standard .NET Process.Kill(true) kills the tree. Let's start with basic Kill.
                    process.Kill();
                    process.WaitForExit();
                }
            }
            catch (Exception ex)
            {
                // Process might already be dead
                Console.WriteLine($"[AudioRecorder] Error stopping ffmpeg: {ex.Message}");
            }
            finally
            {
                StateTracker.ClearRecording();
            }
        }
    }
}