[nAudio] Async Recording has some minor issues !

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Dear Readers,

I am using [NAudio] to record the input from my computer. I also play it while I've written the bytes to a Wave file, I hoped there was a way to play the byte[] without having to write it first but unfortunatly there is no way to do that. Anyways, here is my code, and I would hope that you have some suggestions to make my code better because right now it works, but it's really slow. >.>

C#

public frmMain()
        {
            InitializeComponent();
        }

        private void frmMain_Load(object sender, EventArgs e)
        {
            // -- Create an input (Device/Stream)
            WaveIn _InputDevice = new WaveIn();

            // -- Change it to the device I want to record it from
            // - Using 1 as the default one.
            _InputDevice.DeviceNumber = 0;

            // -- Change the wave format.
            _InputDevice.WaveFormat = new WaveFormat(44100,2);

            // -- Create the event handlers.
            _InputDevice.DataAvailable += new EventHandler<WaveInEventArgs>(_InputDevice_DataAvailable);
            
            // -- Start recording.
            Thread _Thread = new Thread(_InputDevice.StartRecording);
            _Thread.Start();
        }

        WaveFileWriter _Writer;
        void _InputDevice_DataAvailable(object sender, WaveInEventArgs e)
        {
           // -- Get the correct path.
            string Path = Application.StartupPath + "\\" + DateTime.Now.TimeOfDay.Seconds + ".wav";

            // -- New Writer.
            _Writer = new WaveFileWriter(Path, new WaveFormat(24000, 16, 2));

            // -- Write all the bytes
            _Writer.Write(e.Buffer, 0, e.BytesRecorded);

            // -- Flush.
            _Writer.Flush();

            // -- Close.
            _Writer.Close();

            // -- Play it with a sound player.
            SoundPlayer _Player = new SoundPlayer();
            _Player.SoundLocation = Path;
            _Player.PlaySync();

            // -- Delete it.
            File.Delete(_Player.SoundLocation);
                
        }

Posted 12-Dec-12 4:41am

Yvar Birx

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Mark Heath · Answer 1 · 2012-12-13T00:34:00

Solution 2

Use the BufferedWaveProvider to do this. In the DataAvailable event handler, put the data you received into the BufferedWaveProvider. Then you can have a single instance of WaveOut playing from the buffered WaveProvider all the time.

Posted 13-Dec-12 0:34am

Mark Heath

Yvar Birx · Answer 2 · 2012-12-12T05:16:00

Alright, found the solution myself.
There was a method lying around the internet, took a while to find:

C#

private void Play(byte[] p)
{
    try
    {
        WaveOut ou = new WaveOut();
        var s = new MemoryStream(p);
        RawSourceWaveStream r = new RawSourceWaveStream(s, new WaveFormat(44100, 2));
        ou.Init(r);
        ou.Play();
        ou.Stop();
        ou.Dispose();
        s.Dispose();
        r.Dispose();
    }
    catch { }

}