[ NoWrapper ]
public virtual DemuxResult parse_tag (Buffer buffer, bool start_tag, uint tag_size, TagList tags)
parse the tag.
Buffer will be exactly of the size determined by the identify_tag vfunc before. The parse_tag vfunc may change the size stored in *tag_size and return GST_TAG_DEMUX_RESULT_AGAIN to request a larger or smaller buffer. It is also permitted to adjust the tag_size to a smaller value and then return GST_TAG_DEMUX_RESULT_OK in one go. Subclassed MUST override the parse_tag vfunc in their class_init function.