BASS.NET API for the Un4seen BASS Audio LibraryBassEncBASS_Encode_SetNotify Method BASS.NET API for the Un4seen BASS Audio Library
Sets a callback function on an encoder (or all encoders on a channel) to receive notifications about its status.

Namespace: Un4seen.Bass.AddOn.Enc
Assembly: Bass.Net (in Bass.Net.dll) Version:

[DllImportAttribute("bassenc.dll", CharSet = CharSet.Auto)]
public static bool BASS_Encode_SetNotify(
	int handle,
	IntPtr user


Type: SystemInt32
The encoder or channel handle... a HENCODE, HSTREAM, HMUSIC, or HRECORD.
Type: Un4seen.Bass.AddOn.EncENCODENOTIFYPROC
Callback function to receive the notifications... = no callback.
Type: SystemIntPtr
User instance data to pass to the callback function.

Return Value

Type: Boolean
If successful, is returned, else is returned. Use BASS_ErrorGetCode to get the error code.

When setting a notification callback on a channel, it only applies to the encoders that are currently set on the channel. Subsequent encoders will not automatically have the notification callback set on them, this function will have to be called again to set them up.

An encoder can only have one notification callback set. Subsequent calls of this function can be used to change the callback function, or disable notifications (proc = ).

The status of an encoder and its cast connection (if it has one) is checked when data is sent to the encoder or server, and by BASS_Encode_IsActive(Int32). That means an encoder's death will not be detected automatically, and so no notification given, while no data is being encoded.

If the encoder is already dead when setting up a notification callback, the callback will be triggered immediately.

ERROR CODEDescription
BASS_ERROR_HANDLEhandle is not valid.


Using the callback with a recording caster:
Private _myEndoderNotify As ENCODENOTIFYPROC
Private _encoder As Integer = 0
Private _recChan As Integer = 0
Private _autoreconnect As Boolean = True
_recChan = Bass.BASS_RecordStart(44100, 2, BASSFlag.BASS_DEFAULT, 20, Nothing, IntPtr.Zero)
Private Sub Start()
  ' start an encoder
  _encoder = BassEnc.BASS_Encode_Start(_recChan, "lame -r -x -s 44100 -b 128 -", 
                     BASSEncode.BASS_ENCODE_NOHEAD, Nothing, IntPtr.Zero)
  _myEndoderNotify = New ENCODENOTIFYPROC(AddressOf EncoderNotify)
  ' start a caster
  BassEnc.BASS_Encode_CastInit(_encoder, "", "password", 
          Bass.BASS_ENCODE_TYPE_MP3, "name", "url", "genre", Nothing, Nothing, 128, True)
  ' notify on dead encoder/connection 
  BassEnc.BASS_Encode_SetNotify(_encoder, _myEndoderNotify, IntPtr.Zero)
End Sub

Private Sub Stop()
  If _encoder <> 0 Then
    BassEnc.BASS_Encode_SetNotify(_encoder, Nothing, IntPtr.Zero)
    _encoder = 0
  End If
End Sub

Private Sub EncoderNotify(handle As Integer, status As Integer, user As IntPtr)
  ' encoder/connection lost
  If _autoreconnect Then
    ' do auto-reconnect...
    Thread.Sleep(1000) ' wait a sec
  End If
End Sub
private ENCODENOTIFYPROC _myEndoderNotify;
private int _encoder = 0;
private int _recChan = 0;
private bool _autoreconnect = true;
_recChan = Bass.BASS_RecordStart(44100, 2, BASSFlag.BASS_DEFAULT, 20, null, IntPtr.Zero);
private void Start()
  // start an encoder
  _encoder = BassEnc.BASS_Encode_Start(_recChan, "lame -r -x -s 44100 -b 128 -", 
                     BASSEncode.BASS_ENCODE_NOHEAD, null, IntPtr.Zero);
  _myEndoderNotify = new ENCODENOTIFYPROC(EncoderNotify);
  // start a caster
  BassEnc.BASS_Encode_CastInit(_encoder, "", "password", 
          BassEnc.BASS_ENCODE_TYPE_MP3, "name", "url", "genre", null, null, 128, true);
  // notify on dead encoder/connection 
  BassEnc.BASS_Encode_SetNotify(_encoder, _myEndoderNotify, IntPtr.Zero);

private void Stop()
  if (_encoder != 0)
    BassEnc.BASS_Encode_SetNotify(_encoder, null, IntPtr.Zero);
    _encoder = 0;

private void EncoderNotify(int handle, int status, IntPtr user)
  // encoder/connection lost
  if (_autoreconnect)
    // do auto-reconnect...
    Thread.Sleep(1000); // wait a sec
See Also