| 1 | /* license:BSD-3-Clause |
| 2 | * copyright-holders:Aaron Giles |
| 3 | *************************************************************************** |
| 4 | |
| 5 | libchr_zlib.h |
| 6 | |
| 7 | Zlib compression wrappers |
| 8 | |
| 9 | ***************************************************************************/ |
| 10 | |
| 11 | #pragma once |
| 12 | |
| 13 | #ifndef __LIBCHDR_ZLIB_H__ |
| 14 | #define __LIBCHDR_ZLIB_H__ |
| 15 | |
| 16 | #include <stdint.h> |
| 17 | |
| 18 | #include <zlib.h> |
| 19 | #include "coretypes.h" |
| 20 | #include "chd.h" |
| 21 | |
| 22 | #define MAX_ZLIB_ALLOCS 64 |
| 23 | |
| 24 | /* codec-private data for the ZLIB codec */ |
| 25 | |
| 26 | typedef struct _zlib_allocator zlib_allocator; |
| 27 | struct _zlib_allocator |
| 28 | { |
| 29 | UINT32 * allocptr[MAX_ZLIB_ALLOCS]; |
| 30 | UINT32 * allocptr2[MAX_ZLIB_ALLOCS]; |
| 31 | }; |
| 32 | |
| 33 | typedef struct _zlib_codec_data zlib_codec_data; |
| 34 | struct _zlib_codec_data |
| 35 | { |
| 36 | z_stream inflater; |
| 37 | zlib_allocator allocator; |
| 38 | }; |
| 39 | |
| 40 | /* codec-private data for the CDZL codec */ |
| 41 | typedef struct _cdzl_codec_data cdzl_codec_data; |
| 42 | struct _cdzl_codec_data { |
| 43 | /* internal state */ |
| 44 | zlib_codec_data base_decompressor; |
| 45 | #ifdef WANT_SUBCODE |
| 46 | zlib_codec_data subcode_decompressor; |
| 47 | #endif |
| 48 | uint8_t* buffer; |
| 49 | }; |
| 50 | |
| 51 | /* zlib compression codec */ |
| 52 | chd_error zlib_codec_init(void *codec, uint32_t hunkbytes); |
| 53 | |
| 54 | void zlib_codec_free(void *codec); |
| 55 | |
| 56 | chd_error zlib_codec_decompress(void *codec, const uint8_t *src, uint32_t complen, uint8_t *dest, uint32_t destlen); |
| 57 | |
| 58 | voidpf zlib_fast_alloc(voidpf opaque, uInt items, uInt size); |
| 59 | |
| 60 | void zlib_fast_free(voidpf opaque, voidpf address); |
| 61 | |
| 62 | /* cdzl compression codec */ |
| 63 | chd_error cdzl_codec_init(void* codec, uint32_t hunkbytes); |
| 64 | |
| 65 | void cdzl_codec_free(void* codec); |
| 66 | |
| 67 | chd_error cdzl_codec_decompress(void *codec, const uint8_t *src, uint32_t complen, uint8_t *dest, uint32_t destlen); |
| 68 | |
| 69 | #endif /* __LIBCHDR_ZLIB_H__ */ |