| 0,0 → 1,105 |
|---|
| /* |
| jbig2dec |
| |
| Copyright (C) 2001-2005 Artifex Software, Inc. |
| |
| This software is distributed under license and may not |
| be copied, modified or distributed except as expressly |
| authorized under the terms of the license contained in |
| the file LICENSE in this distribution. |
| |
| For further licensing information refer to http://artifex.com/ or |
| contact Artifex Software, Inc., 7 Mt. Lassen Drive - Suite A-134, |
| San Rafael, CA 94903, U.S.A., +1(415)492-9861. |
| */ |
| |
| #ifndef JBIG2_HUFFMAN_H |
| #define JBIG2_HUFFMAN_H |
| |
| /* Huffman coder interface */ |
| |
| typedef struct _Jbig2HuffmanEntry Jbig2HuffmanEntry; |
| typedef struct _Jbig2HuffmanState Jbig2HuffmanState; |
| typedef struct _Jbig2HuffmanTable Jbig2HuffmanTable; |
| typedef struct _Jbig2HuffmanParams Jbig2HuffmanParams; |
| |
| struct _Jbig2HuffmanEntry { |
| union { |
| int32_t RANGELOW; |
| Jbig2HuffmanTable *ext_table; |
| } u; |
| byte PREFLEN; |
| byte RANGELEN; |
| byte flags; |
| }; |
| |
| struct _Jbig2HuffmanTable { |
| int log_table_size; |
| Jbig2HuffmanEntry *entries; |
| }; |
| |
| typedef struct _Jbig2HuffmanLine Jbig2HuffmanLine; |
| |
| struct _Jbig2HuffmanLine { |
| int PREFLEN; |
| int RANGELEN; |
| int RANGELOW; |
| }; |
| |
| struct _Jbig2HuffmanParams { |
| bool HTOOB; |
| int n_lines; |
| const Jbig2HuffmanLine *lines; |
| }; |
| |
| Jbig2HuffmanState * |
| jbig2_huffman_new (Jbig2Ctx *ctx, Jbig2WordStream *ws); |
| |
| void |
| jbig2_huffman_free (Jbig2Ctx *ctx, Jbig2HuffmanState *hs); |
| |
| void |
| jbig2_huffman_skip(Jbig2HuffmanState *hs); |
| |
| void jbig2_huffman_advance(Jbig2HuffmanState *hs, int offset); |
| |
| int |
| jbig2_huffman_offset(Jbig2HuffmanState *hs); |
| |
| int32_t |
| jbig2_huffman_get (Jbig2HuffmanState *hs, |
| const Jbig2HuffmanTable *table, bool *oob); |
| |
| int32_t |
| jbig2_huffman_get_bits (Jbig2HuffmanState *hs, const int bits); |
| |
| #ifdef JBIG2_DEBUG |
| void jbig2_dump_huffman_state(Jbig2HuffmanState *hs); |
| void jbig2_dump_huffman_binary(Jbig2HuffmanState *hs); |
| #endif |
| |
| Jbig2HuffmanTable * |
| jbig2_build_huffman_table (Jbig2Ctx *ctx, const Jbig2HuffmanParams *params); |
| |
| void |
| jbig2_release_huffman_table (Jbig2Ctx *ctx, Jbig2HuffmanTable *table); |
| |
| /* standard Huffman templates defined by the specification */ |
| extern const Jbig2HuffmanParams jbig2_huffman_params_A; /* Table B.1 */ |
| extern const Jbig2HuffmanParams jbig2_huffman_params_B; /* Table B.2 */ |
| extern const Jbig2HuffmanParams jbig2_huffman_params_C; /* Table B.3 */ |
| extern const Jbig2HuffmanParams jbig2_huffman_params_D; /* Table B.4 */ |
| extern const Jbig2HuffmanParams jbig2_huffman_params_E; /* Table B.5 */ |
| extern const Jbig2HuffmanParams jbig2_huffman_params_F; /* Table B.6 */ |
| extern const Jbig2HuffmanParams jbig2_huffman_params_G; /* Table B.7 */ |
| extern const Jbig2HuffmanParams jbig2_huffman_params_H; /* Table B.8 */ |
| extern const Jbig2HuffmanParams jbig2_huffman_params_I; /* Table B.9 */ |
| extern const Jbig2HuffmanParams jbig2_huffman_params_J; /* Table B.10 */ |
| extern const Jbig2HuffmanParams jbig2_huffman_params_K; /* Table B.11 */ |
| extern const Jbig2HuffmanParams jbig2_huffman_params_L; /* Table B.12 */ |
| extern const Jbig2HuffmanParams jbig2_huffman_params_M; /* Table B.13 */ |
| extern const Jbig2HuffmanParams jbig2_huffman_params_N; /* Table B.14 */ |
| extern const Jbig2HuffmanParams jbig2_huffman_params_O; /* Table B.15 */ |
| |
| |
| #endif /* JBIG2_HUFFMAN_H */ |