diff options
Diffstat (limited to 'kernel/kls_jbig/libjbig/jbig.h')
| -rw-r--r-- | kernel/kls_jbig/libjbig/jbig.h | 270 |
1 files changed, 270 insertions, 0 deletions
diff --git a/kernel/kls_jbig/libjbig/jbig.h b/kernel/kls_jbig/libjbig/jbig.h new file mode 100644 index 0000000..1129ac0 --- /dev/null +++ b/kernel/kls_jbig/libjbig/jbig.h @@ -0,0 +1,270 @@ +/* + * Header file for the portable free JBIG compression library + * + * Markus Kuhn -- http://www.cl.cam.ac.uk/~mgk25/ + * + * $Id: jbig.h,v 1.17 2004-06-11 15:18:21+01 mgk25 Exp $ + */ + +#ifndef JBG_H +#define JBG_H + +#include <stddef.h> + +/* + * JBIG-KIT version number + */ + +#define JBG_VERSION "1.6" + +/* + * Buffer block for SDEs which are temporarily stored by encoder + */ + +#define JBG_BUFSIZE 4000 + +struct jbg_buf { + unsigned char d[JBG_BUFSIZE]; /* one block of a buffer list */ + int len; /* length of the data in this block */ + struct jbg_buf *next; /* pointer to next block */ + struct jbg_buf *previous; /* pointer to previous block * + * (unused in freelist) */ + struct jbg_buf *last; /* only used in list head: final block of list */ + struct jbg_buf **free_list; /* pointer to pointer to head of free list */ +}; + +/* + * Maximum number of ATMOVEs per stripe that decoder can handle + */ + +#define JBG_ATMOVES_MAX 64 + +/* + * Option and order flags + */ + +#define JBG_HITOLO 0x08 +#define JBG_SEQ 0x04 +#define JBG_ILEAVE 0x02 +#define JBG_SMID 0x01 + +#define JBG_LRLTWO 0x40 +#define JBG_VLENGTH 0x20 +#define JBG_TPDON 0x10 +#define JBG_TPBON 0x08 +#define JBG_DPON 0x04 +#define JBG_DPPRIV 0x02 +#define JBG_DPLAST 0x01 + +#define JBG_DELAY_AT 0x100 /* delay ATMOVE until the first line of the next + * stripe. Option available for compatibility + * with conformance test example in clause 7.2.*/ + + +/* + * Possible error code return values + */ + +#define JBG_EOK 0 +#define JBG_EOK_INTR 1 +#define JBG_EAGAIN 2 +#define JBG_ENOMEM 3 +#define JBG_EABORT 4 +#define JBG_EMARKER 5 +#define JBG_ENOCONT 6 +#define JBG_EINVAL 7 +#define JBG_EIMPL 8 + +/* + * Language code for error message strings (based on ISO 639 2-letter + * standard language name abbreviations). + */ + +#define JBG_EN 0 /* English */ +#define JBG_DE_8859_1 1 /* German in ISO Latin 1 character set */ +#define JBG_DE_UTF_8 2 /* German in Unicode UTF-8 encoding */ + +/* + * Status description of an arithmetic encoder + */ + +struct jbg_arenc_state { + unsigned char st[4096]; /* probability status for contexts, MSB = MPS */ + unsigned long c; /* C register, base of coding intervall, * + * layout as in Table 23 */ + unsigned long a; /* A register, normalized size of coding intervall */ + long sc; /* counter for buffered 0xff values which might overflow */ + int ct; /* bit shift counter, determines when next byte will be written */ + int buffer; /* buffer for most recent output byte != 0xff */ + void (*byte_out)(int, void *); /* function which receives all PSCD bytes */ + void *file; /* parameter passed to byte_out */ +}; + + +/* + * Status description of an arithmetic decoder + */ + +enum jbg_ardec_result { + JBG_OK, /* symbol has been successfully decoded */ + JBG_READY, /* no more bytes of this PSCD required, marker * + * encountered, probably more symbols available */ + JBG_MORE, /* more PSCD data bytes required to decode a symbol */ + JBG_MARKER /* more PSCD data bytes required, ignored final 0xff byte */ +}; + +struct jbg_ardec_state { + unsigned char st[4096]; /* probability status for contexts, MSB = MPS */ + unsigned long c; /* C register, base of coding intervall, * + * layout as in Table 25 */ + unsigned long a; /* A register, normalized size of coding intervall */ + int ct; /* bit shift counter, determines when next byte will be read */ + unsigned char *pscd_ptr; /* pointer to next PSCD data byte */ + unsigned char *pscd_end; /* pointer to byte after PSCD */ + enum jbg_ardec_result result; /* result of previous decode call */ + int startup; /* controls initial fill of s->c */ +}; + +/* + * Status of a JBIG encoder + */ + +struct jbg_enc_state { + int d; /* resolution layer of the input image */ + unsigned long xd, yd; /* size of the input image (resolution layer d) */ + unsigned long yd1; /* BIH announced height of image, use yd1 != yd to + emulate T.85-style NEWLEN height updates for tests */ + int planes; /* number of different bitmap planes */ + int dl; /* lowest resolution layer in the next BIE */ + int dh; /* highest resolution layer in the next BIE */ + unsigned long l0; /* number of lines per stripe at lowest * + * resolution layer 0 */ + unsigned long stripes; /* number of stripes required (determ. by l0) */ + unsigned char **lhp[2]; /* pointers to lower/higher resolution images */ + int *highres; /* index [plane] of highres image in lhp[] */ + int order; /* SDE ordering parameters */ + int options; /* encoding parameters */ + unsigned mx, my; /* maximum ATMOVE window size */ + int *tx; /* array [plane] with x-offset of adaptive template pixel */ + char *dppriv; /* optional private deterministic prediction table */ + char *res_tab; /* table for the resolution reduction algorithm */ + struct jbg_buf ****sde; /* array [stripe][layer][plane] pointers to * + * buffers for stored SDEs */ + struct jbg_arenc_state *s; /* array [planes] for arithm. encoder status */ + struct jbg_buf *free_list; /* list of currently unused SDE block buffers */ + void (*data_out)(unsigned char *start, size_t len, void *file); + /* data write callback */ + void *file; /* parameter passed to data_out() */ + char *tp; /* buffer for temp. values used by diff. typical prediction */ +}; + + +/* + * Status of a JBIG decoder + */ + +struct jbg_dec_state { + /* data from BIH */ + int d; /* resolution layer of the full image */ + int dl; /* first resolution layer in this BIE */ + unsigned long xd, yd; /* size of the full image (resolution layer d) */ + int planes; /* number of different bitmap planes */ + unsigned long l0; /* number of lines per stripe at lowest * + * resolution layer 0 */ + unsigned long stripes; /* number of stripes required (determ. by l0) */ + int order; /* SDE ordering parameters */ + int options; /* encoding parameters */ + int mx, my; /* maximum ATMOVE window size */ + char *dppriv; /* optional private deterministic prediction table */ + + /* loop variables */ + unsigned long ii[3]; /* current stripe, layer, plane (outer loop first) */ + + /* + * Pointers to array [planes] of lower/higher resolution images. + * lhp[d & 1] contains image of layer d. + */ + unsigned char **lhp[2]; + + /* status information */ + int **tx, **ty; /* array [plane][layer-dl] with x,y-offset of AT pixel */ + struct jbg_ardec_state **s; /* array [plane][layer-dl] for arithmetic * + * decoder status */ + int **reset; /* array [plane][layer-dl] remembers if previous stripe * + * in that plane/resolution ended with SDRST. */ + unsigned long bie_len; /* number of bytes read so far */ + unsigned char buffer[20]; /* used to store BIH or marker segments fragm. */ + int buf_len; /* number of bytes in buffer */ + unsigned long comment_skip; /* remaining bytes of a COMMENT segment */ + unsigned long x; /* x position of next pixel in current SDE */ + unsigned long i; /* line in current SDE (first line of each stripe is 0) */ + int at_moves; /* number of AT moves in the current stripe */ + unsigned long at_line[JBG_ATMOVES_MAX]; /* lines at which an * + * AT move will happen */ + int at_tx[JBG_ATMOVES_MAX], at_ty[JBG_ATMOVES_MAX]; /* ATMOVE offsets in * + * current stripe */ + unsigned long line_h1, line_h2, line_h3; /* variables of decode_pscd */ + unsigned long line_l1, line_l2, line_l3; + int pseudo; /* flag for TPBON/TPDON: next pixel is pseudo pixel */ + int **lntp; /* flag [plane][layer-dl] for TP: line is not typical */ + + unsigned long xmax, ymax; /* if possible abort before image gets * + * larger than this size */ + int dmax; /* abort after this layer */ +}; + + +/* some macros (too trivial for a function) */ + +#define jbg_dec_getplanes(s) ((s)->planes) + +#ifdef __cplusplus +extern "C" { +#endif + +/* function prototypes */ + +void jbg_enc_init(struct jbg_enc_state *s, unsigned long x, unsigned long y, + int planes, unsigned char **p, + void (*data_out)(unsigned char *start, size_t len, + void *file), + void *file); +int jbg_enc_lrlmax(struct jbg_enc_state *s, unsigned long mwidth, + unsigned long mheight); +void jbg_enc_layers(struct jbg_enc_state *s, int d); +int jbg_enc_lrange(struct jbg_enc_state *s, int dl, int dh); +void jbg_enc_options(struct jbg_enc_state *s, int order, int options, + unsigned long l0, int mx, int my); +void jbg_enc_out(struct jbg_enc_state *s); +void jbg_enc_free(struct jbg_enc_state *s); + +void jbg_dec_init(struct jbg_dec_state *s); +void jbg_dec_maxsize(struct jbg_dec_state *s, unsigned long xmax, + unsigned long ymax); +int jbg_dec_in(struct jbg_dec_state *s, unsigned char *data, size_t len, + size_t *cnt); +long jbg_dec_getwidth(const struct jbg_dec_state *s); +long jbg_dec_getheight(const struct jbg_dec_state *s); +unsigned char *jbg_dec_getimage(const struct jbg_dec_state *s, int plane); +long jbg_dec_getsize(const struct jbg_dec_state *s); +void jbg_dec_merge_planes(const struct jbg_dec_state *s, int use_graycode, + void (*data_out)(unsigned char *start, size_t len, + void *file), void *file); +long jbg_dec_getsize_merged(const struct jbg_dec_state *s); +void jbg_dec_free(struct jbg_dec_state *s); + +const char *jbg_strerror(int errnum, int language); +void jbg_int2dppriv(unsigned char *dptable, const char *internal); +void jbg_dppriv2int(char *internal, const unsigned char *dptable); +unsigned long jbg_ceil_half(unsigned long x, int n); +void jbg_split_planes(unsigned long x, unsigned long y, int has_planes, + int encode_planes, + const unsigned char *src, unsigned char **dest, + int use_graycode); +int jbg_newlen(unsigned char *bie, size_t len); + +#ifdef __cplusplus +} +#endif + +#endif /* JBG_H */ |