80 lines
2.4 KiB
C
80 lines
2.4 KiB
C
#ifndef __DBLK_COMPR_H__
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#define __DBLK_COMPR_H__
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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#include "../stdtype.h"
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#include "../common_def.h"
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typedef struct _pcm_compression_table
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{
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UINT8 comprType;
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UINT8 cmpSubType;
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UINT8 bitsDec;
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UINT8 bitsCmp;
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UINT16 valueCount;
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union
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{
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UINT8* d8;
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UINT16* d16; // note: stored in Native Endian
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} values;
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} PCM_COMPR_TBL;
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typedef struct _compression_parameters
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{
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// Compression Types:
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// 00 - bit packing
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// 01 - Delta-PCM
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UINT8 comprType;
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UINT8 subType; // compression sub-type
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UINT8 bitsDec; // bits per value (decompressed)
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UINT8 bitsCmp; // bits per value (compressed)
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UINT16 baseVal;
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const PCM_COMPR_TBL* comprTbl;
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} PCM_CMP_INF;
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typedef struct _pcm_compr_datablk_info
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{
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// general data
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UINT32 hdrSize; // number of bytes taken by the compression header in the VGM *1
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UINT32 decmpLen; // size of decompressed data *2
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// *1 written by Read/WriteComprDataBlkHdr
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// *2 set by ReadComprDataBlkHdr, read by WriteComprDataBlkHdr
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// actual parameters required for (De-)CompressDataBlk
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PCM_CMP_INF cmprInfo;
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} PCM_CDB_INF;
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// small functions to help calculating data sizes
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// Bit Packing/DPCM:
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INLINE UINT32 BPACK_SIZE_CMP(UINT32 sizeDec, UINT32 bitsCmp, UINT32 bitsDec)
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{
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UINT32 byteBits = (bitsDec + 7) & ~7;
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return (UINT32)(((UINT64)sizeDec * bitsCmp + 7) / byteBits);
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}
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INLINE UINT32 BPACK_SIZE_DEC(UINT32 sizeCmp, UINT32 bitsCmp, UINT32 bitsDec)
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{
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UINT32 byteBits = (bitsDec + 7) & ~7;
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return (UINT32)((UINT64)sizeCmp * byteBits / bitsCmp);
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}
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UINT8 ReadComprDataBlkHdr(UINT32 inLen, const UINT8* inData, PCM_CDB_INF* retCdbInf);
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UINT8 WriteComprDataBlkHdr(UINT32 outLen, UINT8* outData, PCM_CDB_INF* cdbInf);
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UINT8 DecompressDataBlk(UINT32 outLen, UINT8* outData, UINT32 inLen, const UINT8* inData, const PCM_CMP_INF* cmprInfo);
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UINT8 DecompressDataBlk_VGM(UINT32* outLen, UINT8** retOutData, UINT32 inLen, const UINT8* inData, const PCM_COMPR_TBL* comprTbl);
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UINT8 CompressDataBlk(UINT32 outLen, UINT8* outData, UINT32 inLen, const UINT8* inData, const PCM_CMP_INF* cmprInfo);
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void ReadPCMComprTable(UINT32 dataSize, const UINT8* data, PCM_COMPR_TBL* comprTbl);
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UINT32 WriteCompressionTable(UINT32 dataSize, UINT8* data, PCM_COMPR_TBL* comprTbl);
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void GenerateReverseLUT_8(UINT16 dstLen, UINT8* dstLUT, UINT16 srcLen, const UINT8* srcLUT);
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void GenerateReverseLUT_16(UINT32 dstLen, UINT16* dstLUT, UINT32 srcLen, const UINT16* srcLUT);
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#ifdef __cplusplus
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}
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#endif
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#endif // __DBLK_COMPR_H__
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