ref: 9f0cd84893d4b71effe4bfd4595d59a5be7f6fc5
dir: /jbig2.h/
/* jbig2dec Copyright (c) 2002 artofcode LLC. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. $Id: jbig2.h,v 1.14 2002/07/09 09:45:32 giles Exp $ */ #ifdef __cplusplus extern "C" { #endif /* warning levels */ typedef enum { JBIG2_SEVERITY_DEBUG, JBIG2_SEVERITY_INFO, JBIG2_SEVERITY_WARNING, JBIG2_SEVERITY_FATAL } Jbig2Severity; typedef enum { JBIG2_OPTIONS_EMBEDDED = 1 } Jbig2Options; /* forward public structure declarations */ typedef struct _Jbig2Allocator Jbig2Allocator; typedef struct _Jbig2Ctx Jbig2Ctx; typedef struct _Jbig2GlobalCtx Jbig2GlobalCtx; typedef struct _Jbig2Segment Jbig2Segment; typedef struct _Jbig2Image Jbig2Image; /* private structures */ typedef struct _Jbig2Page Jbig2Page; typedef struct _Jbig2SymbolDictionary Jbig2SymbolDictionary; /* this is the general image structure used by the jbig2dec library images are 1 bpp, packed into rows a byte at a time. stride gives the byte offset to the next row, while width and height define the size of the image area in pixels. */ struct _Jbig2Image { int width, height, stride; uint8_t *data; }; Jbig2Image* jbig2_image_new(Jbig2Ctx *ctx, int width, int height); void jbig2_image_free(Jbig2Ctx *ctx, Jbig2Image *image); /* error callback */ typedef int (*Jbig2ErrorCallback) (void *data, const char *msg, Jbig2Severity severity, int32_t seg_idx); /* dynamic memory callbacks */ struct _Jbig2Allocator { void *(*alloc) (Jbig2Allocator *allocator, size_t size); void (*free) (Jbig2Allocator *allocator, void *p); void *(*realloc) (Jbig2Allocator *allocator, void *p, size_t size); }; /* decoder context */ Jbig2Ctx *jbig2_ctx_new (Jbig2Allocator *allocator, Jbig2Options options, Jbig2GlobalCtx *global_ctx, Jbig2ErrorCallback error_callback, void *error_callback_data); void jbig2_ctx_free (Jbig2Ctx *ctx); /* global context for embedded streams */ Jbig2GlobalCtx *jbig2_make_global_ctx (Jbig2Ctx *ctx); void jbig2_global_ctx_free (Jbig2GlobalCtx *global_ctx); /* submit data to the decoder */ int jbig2_data_in (Jbig2Ctx *ctx, const unsigned char *data, size_t size); /* get the next available decoded page image */ Jbig2Image *jbig2_page_out (Jbig2Ctx *ctx); /* mark a returned page image as read */ int jbig2_release_page (Jbig2Ctx *ctx, Jbig2Image *image); /* mark the current page as complete, regardless of decoder state (for broken streams) */ int jbig2_complete_page (Jbig2Ctx *ctx); /* segment header routines */ struct _Jbig2Segment { uint32_t number; uint8_t flags; uint32_t page_association; size_t data_length; int referred_to_segment_count; uint32_t *referred_to_segments; void *result; }; Jbig2Segment *jbig2_parse_segment_header (Jbig2Ctx *ctx, uint8_t *buf, size_t buf_size, size_t *p_header_size); int jbig2_parse_segment (Jbig2Ctx *ctx, Jbig2Segment *segment, const uint8_t *segment_data); void jbig2_free_segment (Jbig2Ctx *ctx, Jbig2Segment *segment); #ifdef __cplusplus } #endif