Point v1 and v2 to existing data structures wich may change on any next read/decode function call. v1 and/or v2 can be set to NULL when there is no corresponding data. \return MPG123_OK on success
See Implementation
Point v1 and v2 to existing data structures wich may change on any next read/decode function call. v1 and/or v2 can be set to NULL when there is no corresponding data. \return MPG123_OK on success