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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def libvlc_audio_set_channel(p_mi, channel):
    '''Set current audio channel.
    @param p_mi: media player.
    @param channel: the audio channel, See libvlc_audio_output_channel_t.
    @return: 0 on success, -1 on error.
    '''
    f = _Cfunctions.get('libvlc_audio_set_channel', None) or \
        _Cfunction('libvlc_audio_set_channel', ((1,), (1,),), None,
                    ctypes.c_int, MediaPlayer, ctypes.c_int)
    return f(p_mi, channel)