diff options
Diffstat (limited to 'include/cfitsio/imcompress.h')
| -rw-r--r-- | include/cfitsio/imcompress.h | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/include/cfitsio/imcompress.h b/include/cfitsio/imcompress.h new file mode 100644 index 0000000..c5ba7d2 --- /dev/null +++ b/include/cfitsio/imcompress.h @@ -0,0 +1,56 @@ +#define MAX_COMPRESS_DIM 6 +#define COMPRESS_NULL_VALUE -2147483647 + +typedef struct { + char zcmptype[12]; /* compression type string */ + int compress_type; /* type of compression algorithm */ + int bitpix; /* FITS data type of image (BITPIX) */ + int ndim; /* dimension of image */ + long naxis[MAX_COMPRESS_DIM]; /* length of each axis */ + int cn_compressed; /* column number for COMPRESSED_DATA column */ + int cn_uncompressed; /* column number for UNCOMPRESSED_DATA column */ + int cn_zscale; /* column number for CSCALE column */ + int cn_zzero; /* column number for CZERO column */ + int cn_zblank; /* column number for the CBLANK column */ + double zscale; /* scaling value, if keyword and not column */ + double zzero; /* zero pt, if keyword and not column */ + int zblank; /* value for null pixels, if not a column */ + long nrows; /* number of rows in table */ + int ncols; /* number of columns in table */ + int rice_blocksize; /* first compression parameter */ + int rice_nbits; /* second compression parameter */ + long tilesize[MAX_COMPRESS_DIM]; /* size of compression tiles */ + long maxtilelen; /* max number of pixels in each image tile */ + long maxelem; /* maximum length of variable length arrays */ +} CompressImageInfo; + +/* image compression routines */ +static int imcomp_get_image_params(fitsfile *infptr, CompressImageInfo *otb, + int *status); +static int imcomp_init_table(fitsfile *outfptr, + CompressImageInfo *otb, int *status); +static int imcomp_calc_max_elem (int nx, int blocksize); +static int imcomp_copy_imheader(fitsfile *infptr, fitsfile *outfptr, + int *status); +static int imcomp_img_to_tbl_special (char *card); +static int imcomp_compress_image (fitsfile *infptr, fitsfile *outfptr, + CompressImageInfo *otb, int *status); + +/* image decompression routines */ +int fits_read_compressed_img_plane(fitsfile *fptr, int datatype, + int bytesperpixel, long nplane, long *firstcoord, long *lastcoord, + long *inc, long *naxes, int nullcheck, void *nullval, + void *array, char *nullarray, int *anynul, int *status); +static int imcomp_get_table_params(fitsfile *infptr, CompressImageInfo *itb, + int *status); +static int imcomp_copy_tblheader(fitsfile *infptr, fitsfile *outfptr, + int *status); +static int imcomp_tbl_to_img_special (char *keyname); +static int imcomp_decompress_tile (fitsfile *infptr, CompressImageInfo *itb, + int nrow, int tilesize, int datatype, int nullcheck, + void *nulval, void *buffer, char *bnullarray, int *anynul, + int *status); +static int imcomp_copy_overlap (char *tile, int datatype, int ndim, + long *tfpixel, long *tlpixel, char *bnullarray, char *image, + long *fpixel, long *lpixel, int nullcheck, char *nullarray, + int *status); |