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News Overview Download Order F.A.Q. More info Support Links Welcome QuickStart ActiveX Control C++ Wrapper J2K_Image open easyDecode selectTiles getMetaData decode close J2K_Frames open getFrames getFrame operators close API Reference General getVersion getLastError getErrorStr getLastErrorStr Unlock Open / Close Open Close Info GetInfo GetInfoEx GetResolutions GetResDimensions •GetMetaData Decoding EasyDecode SelectTiles Decode Cancel Debug StartLogging StopLogging |
J2K_GetMetaData Use this function only if you need to extract some additional, vendor specific meta data, embedded into JP2 files. int J2K_GetMetaData(void *image, int *no, int *type, unsigned char **data, int *size); Parameters image A pointer, obtained from J2K_Open(). no A meta data block number. Set to 0 to start enumeration from the beginning. Each call will automatically advance it. type Type of the meta data block. This version of J2K-Codec supports the following types: JP2_METADATA_COMMENT_STR JP2_METADATA_COMMENT_BIN JP2_METADATA_GEOTIFF JP2_METADATA_XML JP2_METADATA_URL JP2_METADATA_PAL JP2_METADATA_ICC JP2_METADATA_UNKNOWN data Points to a variable where the meta data pointer will be placed. If the pointer returned is NULL, then there are no more meta data blocks. size Size of the meta data block.
Return value Returns J2KERR_SUCCESS or an error code if the function has failed. See the list of error codes here. Notes 1. See "C++\i_GeoTIFF" or "VB.NET\c_MetaData" samples for more information. 2. JP2_METADATA_PAL means JP2 palette as specified in the JPEG2000 standard. 3. JP2_METADATA_ICC means JP2 ICC profile. 4. In case of J2K_METADATA_UNKNOWN the data will be returned "as is", i.e. prefixed with 16-byte ID. Example
unsigned char *meta_data; int md_type, md_size, no=0; J2K_Open() |
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