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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2 | daniel-mar | 1 | /** |
| 2 | * LZW Encoder for Imagination Pilots Entertainment 32-bit games (IPE32) |
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| 3 | * - Where's Waldo? Exploring Geography |
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| 4 | * - Eraser Turnabout by Imagination Pilots |
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| 5 | * - Virtual K'Nex by Imagination Pilots |
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| 6 | * ART file packer and unpacker by Daniel Marschall, ViaThinkSoft (C) 2018 |
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| 7 | * Revision: 2018-02-15 |
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| 8 | **/ |
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| 9 | |||
| 10 | #ifndef __inc__ipe32_lzw_encoder |
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| 11 | #define __inc__ipe32_lzw_encoder |
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| 12 | |||
| 13 | #include <stdio.h> |
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| 14 | #include <stdlib.h> |
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| 15 | #include <stdint.h> |
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| 16 | #include <stdbool.h> |
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| 17 | |||
| 18 | typedef struct tagIpe32LZWEncoder { |
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| 19 | int *code_value; /* This is the code value array */ |
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| 20 | unsigned int *prefix_code; /* This array holds the prefix codes */ |
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| 21 | unsigned char *append_character; /* This array holds the appended chars */ |
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| 22 | |||
| 23 | int num_bits; /* Starting with 9 bit codes */ |
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| 24 | uint32_t bytes_in,bytes_out; /* Used to monitor compression ratio */ |
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| 25 | int max_code; /* old MAX_CODE */ |
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| 26 | uint32_t checkpoint; /* For compression ratio monitoring */ |
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| 27 | |||
| 28 | int output_bit_count; |
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| 29 | uint32_t output_bit_buffer; |
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| 30 | } Ipe32LZWEncoder; |
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| 31 | |||
| 32 | // Returns: Bytes written, or -1 if compression failed |
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| 33 | int ipe32lzw_encode(Ipe32LZWEncoder *encoder, unsigned char* compressedData, const size_t compressedBufLen, unsigned char* uncompressedData, const size_t uncompressedSize); |
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| 34 | |||
| 35 | Ipe32LZWEncoder* new_ipe32lzw_encoder(void); |
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| 36 | void ipe32lzw_init_encoder(Ipe32LZWEncoder *encoder); |
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| 37 | void ipe32lzw_free_encoder(Ipe32LZWEncoder *encoder); |
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| 38 | |||
| 39 | #endif // #ifndef __inc__ipe32_lzw_encoder |