vlc.AudioPlayCb
===============

.. py:class:: vlc.AudioPlayCb

   Bases: :py:obj:`ctypes.c_void_p`


   Callback prototype for audio playback.

   The LibVLC media player decodes and post-processes the audio signal
   asynchronously (in an internal thread). Whenever audio *samples* are ready
   to be queued to the output, this callback is invoked.

   The number of *samples* provided per invocation may depend on the file format,
   the audio coding algorithm, the decoder plug-in, the post-processing
   filters and timing. Application must not assume a certain number of *samples*.

   The exact format of audio *samples* is determined by :func:`libvlc_audio_set_format`
   or :func:`libvlc_audio_set_format_callbacks` as is the channels layout.

   Note that the number of *samples* is per channel. For instance, if the audio
   track sampling rate is 48000 Hz, then 1200 *samples* represent 25 milliseconds
   of audio signal - regardless of the number of audio channels.

   :param data: data pointer as passed to :func:`libvlc_audio_set_callbacks` [IN].
   :param samples: pointer to a table of audio samples to play back [IN].
   :param count: number of audio samples to play back.
   :param pts: expected play time stamp (see libvlc_delay).

   Initialize self.  See help(type(self)) for accurate signature.