swr_alloc, ,swr_alloc_set_opts, ,swr_build_matrix, ,swr_close, ,swr_config_frame, ,swr_convert, ,swr_convert_frame, ,swr_drop_output, ,swr_ffversion, ,swr_free, ,swr_get_class, ,swr_get_delay, ,swr_get_out_samples, ,swr_init, ,swr_inject_silence, ,swr_is_initialized, ,swr_next_pts, ,swr_set_channel_mapping, ,swr_set_compensation, ,swr_set_matrix, ,swresample_configuration, ,swresample_license, ,swresample_version.