| 1 | /* license:BSD-3-Clause |
| 2 | * copyright-holders:Aaron Giles |
| 3 | *************************************************************************** |
| 4 | |
| 5 | lzma.h |
| 6 | |
| 7 | LZMA compression wrappers |
| 8 | |
| 9 | ***************************************************************************/ |
| 10 | |
| 11 | #pragma once |
| 12 | |
| 13 | #ifndef __LIBCHDR_LZMA_H__ |
| 14 | #define __LIBCHDR_LZMA_H__ |
| 15 | |
| 16 | #include <stdint.h> |
| 17 | |
| 18 | #include <LzmaEnc.h> |
| 19 | #include <LzmaDec.h> |
| 20 | |
| 21 | #include <libchdr/libchdr_zlib.h> |
| 22 | |
| 23 | /* codec-private data for the LZMA codec */ |
| 24 | #define MAX_LZMA_ALLOCS 64 |
| 25 | |
| 26 | typedef struct _lzma_allocator lzma_allocator; |
| 27 | struct _lzma_allocator |
| 28 | { |
| 29 | void *(*Alloc)(void *p, size_t size); |
| 30 | void (*Free)(void *p, void *address); /* address can be 0 */ |
| 31 | void (*FreeSz)(void *p, void *address, size_t size); /* address can be 0 */ |
| 32 | uint32_t* allocptr[MAX_LZMA_ALLOCS]; |
| 33 | uint32_t* allocptr2[MAX_LZMA_ALLOCS]; |
| 34 | }; |
| 35 | |
| 36 | typedef struct _lzma_codec_data lzma_codec_data; |
| 37 | struct _lzma_codec_data |
| 38 | { |
| 39 | CLzmaDec decoder; |
| 40 | lzma_allocator allocator; |
| 41 | }; |
| 42 | |
| 43 | /* codec-private data for the CDLZ codec */ |
| 44 | typedef struct _cdlz_codec_data cdlz_codec_data; |
| 45 | struct _cdlz_codec_data { |
| 46 | /* internal state */ |
| 47 | lzma_codec_data base_decompressor; |
| 48 | #ifdef WANT_SUBCODE |
| 49 | zlib_codec_data subcode_decompressor; |
| 50 | #endif |
| 51 | uint8_t* buffer; |
| 52 | }; |
| 53 | |
| 54 | chd_error lzma_codec_init(void* codec, uint32_t hunkbytes); |
| 55 | |
| 56 | void lzma_codec_free(void* codec); |
| 57 | |
| 58 | /*------------------------------------------------- |
| 59 | * decompress - decompress data using the LZMA |
| 60 | * codec |
| 61 | *------------------------------------------------- |
| 62 | */ |
| 63 | |
| 64 | chd_error lzma_codec_decompress(void* codec, const uint8_t *src, |
| 65 | uint32_t complen, uint8_t *dest, uint32_t destlen); |
| 66 | |
| 67 | chd_error cdlz_codec_init(void* codec, uint32_t hunkbytes); |
| 68 | |
| 69 | void cdlz_codec_free(void* codec); |
| 70 | |
| 71 | chd_error cdlz_codec_decompress(void *codec, const uint8_t *src, uint32_t complen, uint8_t *dest, uint32_t destlen); |
| 72 | |
| 73 | #endif /* __LIBCHDR_LZMA_H__ */ |