mirror of
https://github.com/OpenRCT2/OpenRCT2
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55 lines
1.8 KiB
C
55 lines
1.8 KiB
C
/*****************************************************************************
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* Copyright (c) 2014-2024 OpenRCT2 developers
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*
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* For a complete list of all authors, please refer to contributors.md
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* Interested in contributing? Visit https://github.com/OpenRCT2/OpenRCT2
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*
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* OpenRCT2 is licensed under the GNU General Public License version 3.
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*****************************************************************************/
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#pragma once
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#include "../common.h"
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#pragma pack(push, 1)
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struct SawyerCodingChunkHeader
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{
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uint8_t encoding;
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uint32_t length;
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};
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assert_struct_size(SawyerCodingChunkHeader, 5);
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#pragma pack(pop)
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enum
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{
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CHUNK_ENCODING_NONE,
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CHUNK_ENCODING_RLE,
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CHUNK_ENCODING_RLECOMPRESSED,
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CHUNK_ENCODING_ROTATE
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};
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enum
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{
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FILE_VERSION_MASK = (3 << 0),
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FILE_VERSION_RCT1 = (0 << 0),
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FILE_VERSION_RCT1_AA = (1 << 0),
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FILE_VERSION_RCT1_LL = (2 << 0),
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FILE_TYPE_MASK = (3 << 2),
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FILE_TYPE_TD4 = (0 << 2),
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FILE_TYPE_SV4 = (1 << 2),
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FILE_TYPE_SC4 = (2 << 2)
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};
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uint32_t SawyerCodingCalculateChecksum(const uint8_t* buffer, size_t length);
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size_t SawyerCodingWriteChunkBuffer(uint8_t* dst_file, const uint8_t* src_buffer, SawyerCodingChunkHeader chunkHeader);
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size_t SawyerCodingDecodeSV4(const uint8_t* src, uint8_t* dst, size_t length, size_t bufferLength);
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size_t SawyerCodingDecodeSC4(const uint8_t* src, uint8_t* dst, size_t length, size_t bufferLength);
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size_t SawyerCodingEencodeSV4(const uint8_t* src, uint8_t* dst, size_t length);
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size_t SawyerCodingDecodeTD6(const uint8_t* src, uint8_t* dst, size_t length);
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size_t SawyerCodingEncodeTD6(const uint8_t* src, uint8_t* dst, size_t length);
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int32_t SawyerCodingValidateTrackChecksum(const uint8_t* src, size_t length);
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int32_t SawyerCodingDetectFileType(const uint8_t* src, size_t length);
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int32_t SawyerCodingDetectRCT1Version(int32_t gameVersion);
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