* \brief convert samples from 16 bit
* \param bps byte per sample for the destination format, must be >= 2
* \param le 0 for big-, 1 for little-endian
+ * \param us 0 for signed, 1 for unsigned output
* \param samples input samples
* \param dst output samples
* \param n number of samples in samples buffer.
* \brief convert samples to 16 bit
* \param bps byte per sample for the source format, must be >= 2
* \param le 0 for big-, 1 for little-endian
+ * \param us 0 for signed, 1 for unsigned input
* \param src input samples
* \param samples output samples
* \param src_len number of bytes in src