54 lines
1.1 KiB
C
54 lines
1.1 KiB
C
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/*
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* decdefs.h
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*
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* Structures and definitions used by the decoder
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*/
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typedef enum
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{
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DEC_STATE_UNKNOWN,
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DEC_STATE_START_NEW_BLOCK,
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DEC_STATE_DECODING_DATA
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} decoder_state;
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/*
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* Size of uncompressed data chunks
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*/
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#define CHUNK_SIZE 32768
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/*
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* Main tree decoding table parameters
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*/
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/* # elements in main tree */
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#define MAIN_TREE_ELEMENTS (NUM_CHARS+(context->dec_num_position_slots<<NL_SHIFT))
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/*
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* Decoding table size allows a direct lookup on the first
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* MAIN_TREE_TABLE_BITS bits of the code (max len 16).
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* Any potential remaining bits are decoded using left/right.
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*/
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#define MAIN_TREE_TABLE_BITS 10
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/*
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* Secondary length tree decoding table parameters
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* Decoding table size allows a direct lookup on the first
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* SECONDARY_LEN_TREE_TABLE_BITS of the code (max len 16).
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* Any potential remaining bits are decoded using left/right.
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*/
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#define SECONDARY_LEN_TREE_TABLE_BITS 8
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/*
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* Aligned offset tree decoding table parameters
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*/
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#define ALIGNED_NUM_ELEMENTS 8
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/*
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* Must be 7, since we do not use left/right for this tree;
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* everything is decoded in one lookup.
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*/
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#define ALIGNED_TABLE_BITS 7
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