kdu_compressed_source::seek

This function should be implemented by sources which support sequential reading of the code-stream from any position (i.e., KDU_SOURCE_CAP_SEEKABLE). Subsequent reads transfer data starting from a location offset bytes beyond the seek origin.

For non-caching sources, the seek origin is the start of the code-stream, regardless of whether or not the code-stream appears at the start of its containing file.

For sources supporting KDU_SOURCE_CAP_CACHED, the seek origin is the start of the code-stream only until such point as the first call to set_precinct_scope or set_tile_header_scope is called. After that, the seek origin is the first byte of the relevant precinct or tile-header (excluding the SOT marker segment).

If seeking is not supported, the function should return false. If seeking is supported, the function should return true, even if offset identifies a location outside the relevant scope.

offset [kdu_long]