• channels : SF_INFO
• data : SF_CHUNK_INFO
• datalen : SF_CHUNK_INFO
• extension : SF_FORMAT_INFO
• flush : SF_VIRTUAL_IO
• format : SF_FORMAT_INFO , SF_INFO
• frames : SF_INFO
• get_filelen : SF_VIRTUAL_IO
• id_size : SF_CHUNK_INFO
• is_pipe : SF_VIRTUAL_IO
• length : SF_EMBED_FILE_INFO
• level : SF_DITHER_INFO
• name : SF_DITHER_INFO , SF_FORMAT_INFO
• offset : SF_EMBED_FILE_INFO
• read : SF_VIRTUAL_IO
• ref : SF_VIRTUAL_IO
• samplerate : SF_INFO
• sections : SF_INFO
• seek : SF_VIRTUAL_IO
• seekable : SF_INFO
• set_filelen : SF_VIRTUAL_IO
• tell : SF_VIRTUAL_IO
• type : SF_DITHER_INFO
• unref : SF_VIRTUAL_IO
• write : SF_VIRTUAL_IO