Set the audio format support of a mpg123_pars in detail:
\param mp parameter handle
\param rate The sample rate value (in Hertz).
\param channels A combination of MPG123_STEREO and MPG123_MONO.
\param encodings A combination of accepted encodings for rate and channels,
p.ex MPG123_ENC_SIGNED16|MPG123_ENC_ULAW_8 (or 0 for no
support).
\return MPG123_OK on success
Set the audio format support of a mpg123_pars in detail: \param mp parameter handle \param rate The sample rate value (in Hertz). \param channels A combination of MPG123_STEREO and MPG123_MONO. \param encodings A combination of accepted encodings for rate and channels, p.ex MPG123_ENC_SIGNED16|MPG123_ENC_ULAW_8 (or 0 for no support). \return MPG123_OK on success