54 … SNDFILE*, sf_open_virtual, (SF_VIRTUAL_IO *sfvirtual, int mode, SF_INFO *sfinfo, void *user_data))
212 static sf_count_t vio_get_filelen(void *user_data)  in vio_get_filelen()  argument
214   sox_format_t *ft = (sox_format_t *)user_data;  in vio_get_filelen()
219   return (sf_count_t)lsx_filelength((sox_format_t *)user_data);  in vio_get_filelen()
222 static sf_count_t vio_seek(sf_count_t offset, int whence, void *user_data)  in vio_seek()  argument
224     return lsx_seeki((sox_format_t *)user_data, (off_t)offset, whence);  in vio_seek()
227 static sf_count_t vio_read(void *ptr, sf_count_t count, void *user_data)  in vio_read()  argument
229     return lsx_readbuf((sox_format_t *)user_data, ptr, (size_t)count);  in vio_read()
232 static sf_count_t vio_write(const void *ptr, sf_count_t count, void *user_data)  in vio_write()  argument
234     return lsx_writebuf((sox_format_t *)user_data, ptr, (size_t)count);  in vio_write()
237 static sf_count_t vio_tell(void *user_data)  in vio_tell()  argument
239     return lsx_tell((sox_format_t *)user_data);  in vio_tell()