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Fixed endianess issues with ncrush.

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This commit is contained in:
Armin Novak 2017-11-23 10:47:56 +01:00
parent d982cf0e90
commit 13e0d56574
2 changed files with 184 additions and 188 deletions
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310
libfreerdp/codec/ncrush.c
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@ -3,6 +3,8 @@
* NCrush (RDP6) Bulk Data Compression
*
* Copyright 2014 Marc-Andre Moreau <marcandre.moreau@gmail.com>
* Copyright 2017 Armin Novak <armin.novak@thincast.com>
* Copyright 2017 Thincast Technologies GmbH
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@ -30,7 +32,7 @@
#define TAG FREERDP_TAG("codec")
UINT16 HuffTableLEC[8192] =
static const UINT16 HuffTableLEC[8192] =
{
0x510B, 0x611F, 0x610D, 0x9027, 0x6000, 0x7105, 0x6117, 0xA068, 0x5111, 0x7007, 0x6113, 0x90C0, 0x6108, 0x8018, 0x611B, 0xA0B3,
0x510F, 0x7003, 0x6110, 0x9042, 0x6002, 0x800B, 0x6119, 0xA091, 0x5121, 0x7080, 0x6115, 0xA03A, 0x610A, 0x9012, 0x611D, 0xA0D7,
@ -546,7 +548,7 @@ UINT16 HuffTableLEC[8192] =
0x510F, 0x7006, 0x6112, 0x9090, 0x6107, 0x8013, 0x611A, 0xA0B1, 0x5121, 0x7103, 0x6116, 0xA067, 0x610C, 0x9026, 0x611E, 0xD125
};
UINT16 HuffTableLOM[512] =
static const UINT16 HuffTableLOM[512] =
{
0x2001, 0x4000, 0x3002, 0x4008, 0x2001, 0x4005, 0x3004, 0x500A, 0x2001, 0x4003, 0x3002, 0x5007, 0x2001, 0x4006, 0x3004, 0x700D,
0x2001, 0x4000, 0x3002, 0x4008, 0x2001, 0x4005, 0x3004, 0x600B, 0x2001, 0x4003, 0x3002, 0x5009, 0x2001, 0x4006, 0x3004, 0x8012,
@ -582,7 +584,7 @@ UINT16 HuffTableLOM[512] =
0x2001, 0x4000, 0x3002, 0x4008, 0x2001, 0x4005, 0x3004, 0x600C, 0x2001, 0x4003, 0x3002, 0x5009, 0x2001, 0x4006, 0x3004, 0x901F
};
const BYTE HuffTableMask[39] =
static const BYTE HuffTableMask[39] =
{
0x11, /* 0 */
0x9E, /* 1 */
@ -625,7 +627,7 @@ const BYTE HuffTableMask[39] =
0x00 /* 38 */
};
const BYTE HuffLengthLEC[294] =
static const BYTE HuffLengthLEC[294] =
{
6, /* 0 */
6, /* 1 */
@ -923,7 +925,7 @@ const BYTE HuffLengthLEC[294] =
13 /* 293 */
};
const BYTE HuffCodeLEC[588] =
static const BYTE HuffCodeLEC[588] =
{
0x04, /* 0 */
0x00, /* 1 */
@ -1515,7 +1517,7 @@ const BYTE HuffCodeLEC[588] =
0x1F /* 587 */
};
const BYTE HuffLengthLOM[32] =
static const BYTE HuffLengthLOM[32] =
{
4, /* 0 */
2, /* 1 */
@ -1551,7 +1553,7 @@ const BYTE HuffLengthLOM[32] =
9 /* 31 */
};
const UINT16 HuffCodeLOM[32] =
static const UINT16 HuffCodeLOM[32] =
{
0x0001, /* 0 */
0x0000, /* 1 */
@ -1587,7 +1589,7 @@ const UINT16 HuffCodeLOM[32] =
0x01FF /* 31 */
};
UINT32 CopyOffsetBitsLUT[32] =
static const UINT32 CopyOffsetBitsLUT[32] =
{
0x0, /* 0 */
0x0, /* 1 */
@ -1623,7 +1625,7 @@ UINT32 CopyOffsetBitsLUT[32] =
0xE /* 31 */
};
UINT32 CopyOffsetBaseLUT[32] =
static const UINT32 CopyOffsetBaseLUT[32] =
{
0x1, /* 0 */
0x2, /* 1 */
@ -1659,7 +1661,7 @@ UINT32 CopyOffsetBaseLUT[32] =
0xC001 /* 31 */
};
UINT32 LOMBitsLUT[30] =
static const UINT32 LOMBitsLUT[30] =
{
0x0, /* 0 */
0x0, /* 1 */
@ -1693,7 +1695,7 @@ UINT32 LOMBitsLUT[30] =
0xE /* 29 */
};
UINT32 LOMBaseLUT[30] =
static const UINT32 LOMBaseLUT[30] =
{
0x2, /* 0 */
0x3, /* 1 */
@ -1727,51 +1729,89 @@ UINT32 LOMBaseLUT[30] =
0x2 /* 29 */
};
#define NCrushFetchBits() \
if (nbits < 16) { \
if ((SrcPtr + 1) >= SrcEnd) { \
if (SrcPtr >= SrcEnd) { \
if (nbits < 0) \
return -1; \
} else { \
bits += *SrcPtr++ << nbits; \
nbits += 8; \
} \
} else { \
bits += *((UINT16*) SrcPtr) << nbits; \
SrcPtr += 2; \
nbits += 16; \
} \
} \
#define NCrushWriteStart() \
bits = 0; \
offset = 0; \
accumulator = 0
#define NCrushWriteBits(_bits, _nbits) \
accumulator |= _bits << offset; \
offset += _nbits; \
if (offset >= 16) { \
*DstPtr++ = accumulator & 0xFF; \
*DstPtr++ = (accumulator >> 8) & 0xFF; \
accumulator >>= 16; \
offset -= 16; \
static INLINE UINT16 get_word(const BYTE* data)
{
UINT16 tmp = *data++;
tmp |= *data << 8;
return tmp;
}
#define NCrushWriteFinish() \
*DstPtr++ = accumulator & 0xFF; \
*DstPtr++ = (accumulator >> 8) & 0xFF
static INLINE UINT32 get_dword(const BYTE* data)
{
UINT32 tmp = *data++;
tmp |= *data++ << 8U;
tmp |= *data++ << 16U;
tmp |= *data++ << 24U;
return tmp;
}
int ncrush_decompress(NCRUSH_CONTEXT* ncrush, BYTE* pSrcData, UINT32 SrcSize, BYTE** ppDstData, UINT32* pDstSize, UINT32 flags)
static INLINE BOOL NCrushFetchBits(const BYTE** SrcPtr, const BYTE** SrcEnd, INT32* nbits,
UINT32* bits)
{
if (*nbits < 16)
{
if ((*SrcPtr + 1) >= *SrcEnd)
{
if (*SrcPtr >= *SrcEnd)
{
if (*nbits < 0)
return FALSE;
}
else
{
*bits += *(*SrcPtr)++ << *nbits;
*nbits += 8;
}
}
else
{
UINT16 tmp = *(*SrcPtr)++;
tmp |= (*(*SrcPtr)++) << 8;
*bits += tmp << *nbits;
*nbits += 16;
}
}
return TRUE;
}
static INLINE void NCrushWriteStart(UINT32* bits, UINT32* offset, UINT32* accumulator)
{
*bits = 0;
*offset = 0;
*accumulator = 0;
}
static INLINE void NCrushWriteBits(BYTE** DstPtr, UINT32* accumulator, UINT32* offset,
UINT32 _bits, UINT32 _nbits)
{
*accumulator |= _bits << *offset;
*offset += _nbits;
if (*offset >= 16)
{
*(*DstPtr)++ = (*accumulator & 0xFF);
*(*DstPtr)++ = ((*accumulator >> 8) & 0xFF);
*accumulator >>= 16;
*offset -= 16;
}
}
static INLINE void NCrushWriteFinish(BYTE** DstPtr, UINT32 accumulator)
{
*(*DstPtr)++ = accumulator & 0xFF;
*(*DstPtr)++ = (accumulator >> 8) & 0xFF;
}
int ncrush_decompress(NCRUSH_CONTEXT* ncrush, BYTE* pSrcData, UINT32 SrcSize, BYTE** ppDstData,
UINT32* pDstSize, UINT32 flags)
{
UINT32 index;
UINT32 bits;
INT32 nbits;
BYTE* SrcPtr;
BYTE* SrcEnd;
const BYTE* SrcPtr;
const BYTE* SrcEnd;
UINT16 Mask;
UINT16* pMask;
BYTE Literal;
UINT32 IndexLEC;
UINT32 BitLength;
@ -1824,26 +1864,23 @@ int ncrush_decompress(NCRUSH_CONTEXT* ncrush, BYTE* pSrcData, UINT32 SrcSize, BY
}
SrcEnd = &pSrcData[SrcSize];
nbits = 32;
bits = *((UINT32*) pSrcData);
bits = get_dword(pSrcData);
SrcPtr = pSrcData + 4;
while (1)
{
while (1)
{
pMask = (UINT16*) &HuffTableMask[29];
Mask = *pMask;
Mask = get_word(&HuffTableMask[29]);
MaskedBits = bits & Mask;
IndexLEC = HuffTableLEC[MaskedBits] & 0xFFF;
BitLength = HuffTableLEC[MaskedBits] >> 12;
bits >>= BitLength;
nbits -= BitLength;
NCrushFetchBits();
if (!NCrushFetchBits(&SrcPtr, &SrcEnd, &nbits, &bits))
return -1;
if (IndexLEC >= 256)
break;
@ -1856,7 +1893,6 @@ int ncrush_decompress(NCRUSH_CONTEXT* ncrush, BYTE* pSrcData, UINT32 SrcSize, BY
}
Literal = (HuffTableLEC[MaskedBits] & 0xFF);
*HistoryPtr++ = Literal;
}
@ -1873,34 +1909,29 @@ int ncrush_decompress(NCRUSH_CONTEXT* ncrush, BYTE* pSrcData, UINT32 SrcSize, BY
return -1004;
CopyOffset = ncrush->OffsetCache[OffsetCacheIndex];
pMask = (UINT16*) &HuffTableMask[21];
Mask = *pMask;
Mask = get_word(&HuffTableMask[21]);
MaskedBits = bits & Mask;
LengthOfMatch = HuffTableLOM[MaskedBits] & 0xFFF;
BitLength = HuffTableLOM[MaskedBits] >> 12;
bits >>= BitLength;
nbits -= BitLength;
NCrushFetchBits();
if (!NCrushFetchBits(&SrcPtr, &SrcEnd, &nbits, &bits))
return -1;
LengthOfMatchBits = LOMBitsLUT[LengthOfMatch];
LengthOfMatchBase = LOMBaseLUT[LengthOfMatch];
if (LengthOfMatchBits)
{
pMask = (UINT16*) &HuffTableMask[(2 * LengthOfMatchBits) + 3];
Mask = *pMask;
Mask = get_word(&HuffTableMask[(2 * LengthOfMatchBits) + 3]);
MaskedBits = bits & Mask;
bits >>= LengthOfMatchBits;
nbits -= LengthOfMatchBits;
LengthOfMatchBase += MaskedBits;
NCrushFetchBits();
if (!NCrushFetchBits(&SrcPtr, &SrcEnd, &nbits, &bits))
return -1;
}
OldCopyOffset = ncrush->OffsetCache[OffsetCacheIndex];
@ -1915,45 +1946,39 @@ int ncrush_decompress(NCRUSH_CONTEXT* ncrush, BYTE* pSrcData, UINT32 SrcSize, BY
if (CopyOffsetBits)
{
pMask = (UINT16*) &HuffTableMask[(2 * CopyOffsetBits) + 3];
Mask = *pMask;
Mask = get_word(&HuffTableMask[(2 * CopyOffsetBits) + 3]);
MaskedBits = bits & Mask;
CopyOffset = CopyOffsetBase + MaskedBits - 1;
bits >>= CopyOffsetBits;
nbits -= CopyOffsetBits;
NCrushFetchBits();
if (!NCrushFetchBits(&SrcPtr, &SrcEnd, &nbits, &bits))
return -1;
}
pMask = (UINT16*) &HuffTableMask[21];
Mask = *pMask;
Mask = get_word(&HuffTableMask[21]);
MaskedBits = bits & Mask;
LengthOfMatch = HuffTableLOM[MaskedBits] & 0xFFF;
BitLength = HuffTableLOM[MaskedBits] >> 12;
bits >>= BitLength;
nbits -= BitLength;
NCrushFetchBits();
if (!NCrushFetchBits(&SrcPtr, &SrcEnd, &nbits, &bits))
return -1;
LengthOfMatchBits = LOMBitsLUT[LengthOfMatch];
LengthOfMatchBase = LOMBaseLUT[LengthOfMatch];
if (LengthOfMatchBits)
{
pMask = (UINT16*) &HuffTableMask[(2 * LengthOfMatchBits) + 3];
Mask = *pMask;
Mask = get_word(&HuffTableMask[(2 * LengthOfMatchBits) + 3]);
MaskedBits = bits & Mask;
bits >>= LengthOfMatchBits;
nbits -= LengthOfMatchBits;
LengthOfMatchBase += MaskedBits;
NCrushFetchBits();
if (!NCrushFetchBits(&SrcPtr, &SrcEnd, &nbits, &bits))
return -1;
}
ncrush->OffsetCache[3] = ncrush->OffsetCache[2];
@ -1973,7 +1998,6 @@ int ncrush_decompress(NCRUSH_CONTEXT* ncrush, BYTE* pSrcData, UINT32 SrcSize, BY
return -1006;
CopyOffsetPtr = HistoryPtr - CopyOffset;
index = 0;
CopyLength = (LengthOfMatch > CopyOffset) ? CopyOffset : LengthOfMatch;
@ -2024,32 +2048,32 @@ int ncrush_decompress(NCRUSH_CONTEXT* ncrush, BYTE* pSrcData, UINT32 SrcSize, BY
if (ncrush->HistoryBufferFence != 0xABABABAB)
{
WLog_ERR(TAG, "NCrushDecompress: history buffer fence was overwritten, potential buffer overflow detected!");
WLog_ERR(TAG,
"NCrushDecompress: history buffer fence was overwritten, potential buffer overflow detected!");
return -1007;
}
*pDstSize = HistoryPtr - ncrush->HistoryPtr;
*ppDstData = ncrush->HistoryPtr;
ncrush->HistoryPtr = HistoryPtr;
return 1;
}
int ncrush_hash_table_add(NCRUSH_CONTEXT* ncrush, BYTE* pSrcData, UINT32 SrcSize, UINT32 HistoryOffset)
static int ncrush_hash_table_add(NCRUSH_CONTEXT* ncrush, const BYTE* pSrcData, UINT32 SrcSize,
UINT32 HistoryOffset)
{
BYTE* SrcPtr;
const BYTE* SrcPtr;
UINT32 Hash;
UINT32 Offset;
UINT32 EndOffset;
SrcPtr = pSrcData;
Offset = HistoryOffset;
EndOffset = Offset + SrcSize - 8;
while (Offset < EndOffset)
{
Hash = ncrush->HashTable[*((UINT16*) SrcPtr)];
ncrush->HashTable[*((UINT16*) SrcPtr)] = Offset;
Hash = ncrush->HashTable[get_word(SrcPtr)];
ncrush->HashTable[get_word(SrcPtr)] = Offset;
ncrush->MatchTable[Offset] = Hash;
SrcPtr++;
Offset++;
@ -2058,10 +2082,10 @@ int ncrush_hash_table_add(NCRUSH_CONTEXT* ncrush, BYTE* pSrcData, UINT32 SrcSize
return 1;
}
int ncrush_find_match_length(BYTE* Ptr1, BYTE* Ptr2, BYTE* HistoryPtr)
static int ncrush_find_match_length(const BYTE* Ptr1, const BYTE* Ptr2, BYTE* HistoryPtr)
{
BYTE val1, val2;
BYTE* Ptr = Ptr1;
const BYTE* Ptr = Ptr1;
do
{
@ -2076,7 +2100,8 @@ int ncrush_find_match_length(BYTE* Ptr1, BYTE* Ptr2, BYTE* HistoryPtr)
return Ptr1 - (Ptr + 1);
}
int ncrush_find_best_match(NCRUSH_CONTEXT* ncrush, UINT16 HistoryOffset, UINT32* pMatchOffset)
static int ncrush_find_best_match(NCRUSH_CONTEXT* ncrush, UINT16 HistoryOffset,
UINT32* pMatchOffset)
{
int i, j;
int Length;
@ -2093,10 +2118,8 @@ int ncrush_find_best_match(NCRUSH_CONTEXT* ncrush, UINT16 HistoryOffset, UINT32*
MatchLength = 2;
Offset = HistoryOffset;
HistoryBuffer = (BYTE*) ncrush->HistoryBuffer;
ncrush->MatchTable[0] = HistoryOffset;
MatchOffset = ncrush->MatchTable[HistoryOffset];
NextOffset = ncrush->MatchTable[Offset];
MatchPtr = &HistoryBuffer[MatchLength];
@ -2107,6 +2130,7 @@ int ncrush_find_best_match(NCRUSH_CONTEXT* ncrush, UINT16 HistoryOffset, UINT32*
if (j < 0)
{
Offset = ncrush->MatchTable[NextOffset];
if (MatchPtr[NextOffset] == HistoryBuffer[HistoryOffset + MatchLength])
j = 0;
}
@ -2114,6 +2138,7 @@ int ncrush_find_best_match(NCRUSH_CONTEXT* ncrush, UINT16 HistoryOffset, UINT32*
if (j < 0)
{
NextOffset = ncrush->MatchTable[Offset];
if (MatchPtr[Offset] == HistoryBuffer[HistoryOffset + MatchLength])
j = 1;
}
@ -2121,6 +2146,7 @@ int ncrush_find_best_match(NCRUSH_CONTEXT* ncrush, UINT16 HistoryOffset, UINT32*
if (j < 0)
{
Offset = ncrush->MatchTable[NextOffset];
if (MatchPtr[NextOffset] == HistoryBuffer[HistoryOffset + MatchLength])
j = 2;
}
@ -2128,6 +2154,7 @@ int ncrush_find_best_match(NCRUSH_CONTEXT* ncrush, UINT16 HistoryOffset, UINT32*
if (j < 0)
{
NextOffset = ncrush->MatchTable[Offset];
if (MatchPtr[Offset] == HistoryBuffer[HistoryOffset + MatchLength])
j = 3;
}
@ -2135,6 +2162,7 @@ int ncrush_find_best_match(NCRUSH_CONTEXT* ncrush, UINT16 HistoryOffset, UINT32*
if (j < 0)
{
Offset = ncrush->MatchTable[NextOffset];
if (MatchPtr[NextOffset] == HistoryBuffer[HistoryOffset + MatchLength])
j = 4;
}
@ -2142,6 +2170,7 @@ int ncrush_find_best_match(NCRUSH_CONTEXT* ncrush, UINT16 HistoryOffset, UINT32*
if (j < 0)
{
NextOffset = ncrush->MatchTable[Offset];
if (MatchPtr[Offset] == HistoryBuffer[HistoryOffset + MatchLength])
j = 5;
}
@ -2175,17 +2204,17 @@ int ncrush_find_best_match(NCRUSH_CONTEXT* ncrush, UINT16 HistoryOffset, UINT32*
continue;
}
}
break;
}
}
ncrush->MatchTable[0] = 0;
*pMatchOffset = MatchOffset;
return MatchLength;
}
int ncrush_move_encoder_windows(NCRUSH_CONTEXT* ncrush, BYTE* HistoryPtr)
static int ncrush_move_encoder_windows(NCRUSH_CONTEXT* ncrush, BYTE* HistoryPtr)
{
int i, j;
int NewHash;
@ -2205,13 +2234,10 @@ int ncrush_move_encoder_windows(NCRUSH_CONTEXT* ncrush, BYTE* HistoryPtr)
{
NewHash = ncrush->HashTable[i + 0] - HistoryOffset;
ncrush->HashTable[i + 0] = (NewHash <= 0) ? 0 : NewHash;
NewHash = ncrush->HashTable[i + 1] - HistoryOffset;
ncrush->HashTable[i + 1] = (NewHash <= 0) ? 0 : NewHash;
NewHash = ncrush->HashTable[i + 2] - HistoryOffset;
ncrush->HashTable[i + 2] = (NewHash <= 0) ? 0 : NewHash;
NewHash = ncrush->HashTable[i + 3] - HistoryOffset;
ncrush->HashTable[i + 3] = (NewHash <= 0) ? 0 : NewHash;
}
@ -2220,33 +2246,30 @@ int ncrush_move_encoder_windows(NCRUSH_CONTEXT* ncrush, BYTE* HistoryPtr)
{
NewMatch = ncrush->MatchTable[HistoryOffset + j + 0] - HistoryOffset;
ncrush->MatchTable[j + 0] = (NewMatch <= 0) ? 0 : NewMatch;
NewMatch = ncrush->MatchTable[HistoryOffset + j + 1] - HistoryOffset;
ncrush->MatchTable[j + 1] = (NewMatch <= 0) ? 0 : NewMatch;
NewMatch = ncrush->MatchTable[HistoryOffset + j + 2] - HistoryOffset;
ncrush->MatchTable[j + 2] = (NewMatch <= 0) ? 0 : NewMatch;
NewMatch = ncrush->MatchTable[HistoryOffset + j + 3] - HistoryOffset;
ncrush->MatchTable[j + 3] = (NewMatch <= 0) ? 0 : NewMatch;
}
ZeroMemory(&ncrush->MatchTable[32768], 65536);
return 1;
}
int ncrush_compress(NCRUSH_CONTEXT* ncrush, BYTE* pSrcData, UINT32 SrcSize, BYTE** ppDstData, UINT32* pDstSize, UINT32* pFlags)
int ncrush_compress(NCRUSH_CONTEXT* ncrush, BYTE* pSrcData, UINT32 SrcSize, BYTE** ppDstData,
UINT32* pDstSize, UINT32* pFlags)
{
BYTE Literal;
BYTE* SrcPtr;
const BYTE* SrcPtr;
BYTE* DstPtr;
UINT32 bits;
UINT32 offset;
UINT16 Mask;
UINT32 MaskedBits;
UINT32 accumulator;
BYTE* SrcEndPtr;
const BYTE* SrcEndPtr;
BYTE* DstEndPtr;
BYTE* HistoryPtr;
BYTE* pDstData;
@ -2258,7 +2281,6 @@ int ncrush_compress(NCRUSH_CONTEXT* ncrush, BYTE* pSrcData, UINT32 SrcSize, BYTE
UINT32 IndexLOM;
UINT32 IndexCO;
UINT32 CodeLEC;
UINT16* pCodeLEC;
UINT32 BitLength;
UINT32 CopyOffset;
UINT32 MatchOffset;
@ -2272,10 +2294,8 @@ int ncrush_compress(NCRUSH_CONTEXT* ncrush, BYTE* pSrcData, UINT32 SrcSize, BYTE
UINT32 CopyOffsetIndex;
UINT32 CopyOffsetBits;
UINT32 CompressionLevel;
CompressionLevel = 2;
HistoryBuffer = ncrush->HistoryBuffer;
*pFlags = 0;
PacketFlushed = FALSE;
PacketAtFront = FALSE;
@ -2315,9 +2335,7 @@ int ncrush_compress(NCRUSH_CONTEXT* ncrush, BYTE* pSrcData, UINT32 SrcSize, BYTE
return -1003;
DstSize = SrcSize;
NCrushWriteStart();
NCrushWriteStart(&bits, &offset, &accumulator);
DstPtr = pDstData;
SrcPtr = pSrcData;
SrcEndPtr = &pSrcData[SrcSize];
@ -2326,7 +2344,6 @@ int ncrush_compress(NCRUSH_CONTEXT* ncrush, BYTE* pSrcData, UINT32 SrcSize, BYTE
HistoryPtr = &HistoryBuffer[ncrush->HistoryOffset];
HistoryBufferEndPtr = &HistoryBuffer[65536];
HistoryBufferSize = ncrush->HistoryBufferSize;
CopyOffset = 0;
MatchOffset = 0;
ncrush_hash_table_add(ncrush, pSrcData, SrcSize, HistoryPtr - HistoryBuffer);
@ -2362,7 +2379,6 @@ int ncrush_compress(NCRUSH_CONTEXT* ncrush, BYTE* pSrcData, UINT32 SrcSize, BYTE
if (!MatchLength)
{
/* Literal */
Literal = *SrcPtr++;
HistoryPtr++;
@ -2378,13 +2394,12 @@ int ncrush_compress(NCRUSH_CONTEXT* ncrush, BYTE* pSrcData, UINT32 SrcSize, BYTE
IndexLEC = Literal;
BitLength = HuffLengthLEC[IndexLEC];
pCodeLEC = (UINT16*) &HuffCodeLEC[IndexLEC * 2];
CodeLEC = (UINT32) *pCodeLEC;
CodeLEC = get_word(&HuffCodeLEC[IndexLEC * 2]);
if (BitLength > 15)
return -1006;
NCrushWriteBits(CodeLEC, BitLength);
NCrushWriteBits(&DstPtr, &accumulator, &offset, CodeLEC, BitLength);
}
else
{
@ -2455,7 +2470,6 @@ int ncrush_compress(NCRUSH_CONTEXT* ncrush, BYTE* pSrcData, UINT32 SrcSize, BYTE
if (OffsetCacheIndex >= 4)
{
/* CopyOffset not in OffsetCache */
if (CopyOffset >= 256)
bits = (CopyOffset >> 7) + 256;
else
@ -2463,11 +2477,9 @@ int ncrush_compress(NCRUSH_CONTEXT* ncrush, BYTE* pSrcData, UINT32 SrcSize, BYTE
CopyOffsetIndex = ncrush->HuffTableCopyOffset[bits + 2];
CopyOffsetBits = CopyOffsetBitsLUT[CopyOffsetIndex];
IndexLEC = 257 + CopyOffsetIndex;
BitLength = HuffLengthLEC[IndexLEC];
pCodeLEC = (UINT16*) &HuffCodeLEC[IndexLEC * 2];
CodeLEC = (UINT32) *pCodeLEC;
CodeLEC = get_word(&HuffCodeLEC[IndexLEC * 2]);
if (BitLength > 15)
return -1008;
@ -2475,12 +2487,10 @@ int ncrush_compress(NCRUSH_CONTEXT* ncrush, BYTE* pSrcData, UINT32 SrcSize, BYTE
if (CopyOffsetBits > 18)
return -1009;
NCrushWriteBits(CodeLEC, BitLength);
NCrushWriteBits(&DstPtr, &accumulator, &offset, CodeLEC, BitLength);
Mask = ((1 << CopyOffsetBits) - 1);
MaskedBits = CopyOffset & Mask;
NCrushWriteBits(MaskedBits, CopyOffsetBits);
NCrushWriteBits(&DstPtr, &accumulator, &offset, MaskedBits, CopyOffsetBits);
if ((MatchLength - 2) >= 768)
IndexCO = 28;
@ -2489,13 +2499,10 @@ int ncrush_compress(NCRUSH_CONTEXT* ncrush, BYTE* pSrcData, UINT32 SrcSize, BYTE
BitLength = HuffLengthLOM[IndexCO];
IndexLOM = LOMBitsLUT[IndexCO];
NCrushWriteBits(HuffCodeLOM[IndexCO], BitLength);
NCrushWriteBits(&DstPtr, &accumulator, &offset, HuffCodeLOM[IndexCO], BitLength);
Mask = ((1 << IndexLOM) - 1);
MaskedBits = (MatchLength - 2) & Mask;
NCrushWriteBits(MaskedBits, IndexLOM);
NCrushWriteBits(&DstPtr, &accumulator, &offset, MaskedBits, IndexLOM);
if ((MaskedBits + LOMBaseLUT[IndexCO]) != MatchLength)
return -1010;
@ -2503,16 +2510,14 @@ int ncrush_compress(NCRUSH_CONTEXT* ncrush, BYTE* pSrcData, UINT32 SrcSize, BYTE
else
{
/* CopyOffset in OffsetCache */
IndexLEC = 289 + OffsetCacheIndex;
BitLength = HuffLengthLEC[IndexLEC];
pCodeLEC = (UINT16*) &HuffCodeLEC[IndexLEC * 2];
CodeLEC = (UINT32) *pCodeLEC;
CodeLEC = get_word(&HuffCodeLEC[IndexLEC * 2]);
if (BitLength >= 15)
return -1011;
NCrushWriteBits(CodeLEC, BitLength);
NCrushWriteBits(&DstPtr, &accumulator, &offset, CodeLEC, BitLength);
if ((MatchLength - 2) >= 768)
IndexCO = 28;
@ -2521,13 +2526,10 @@ int ncrush_compress(NCRUSH_CONTEXT* ncrush, BYTE* pSrcData, UINT32 SrcSize, BYTE
BitLength = HuffLengthLOM[IndexCO];
IndexLOM = LOMBitsLUT[IndexCO];
NCrushWriteBits(HuffCodeLOM[IndexCO], BitLength);
NCrushWriteBits(&DstPtr, &accumulator, &offset, HuffCodeLOM[IndexCO], BitLength);
Mask = ((1 << IndexLOM) - 1);
MaskedBits = (MatchLength - 2) & Mask;
NCrushWriteBits(MaskedBits, IndexLOM);
NCrushWriteBits(&DstPtr, &accumulator, &offset, MaskedBits, IndexLOM);
if ((MaskedBits + LOMBaseLUT[IndexCO]) != MatchLength)
return -1012;
@ -2552,16 +2554,14 @@ int ncrush_compress(NCRUSH_CONTEXT* ncrush, BYTE* pSrcData, UINT32 SrcSize, BYTE
Literal = *SrcPtr++;
HistoryPtr++;
IndexLEC = Literal;
BitLength = HuffLengthLEC[IndexLEC];
pCodeLEC = (UINT16*) &HuffCodeLEC[IndexLEC * 2];
CodeLEC = (UINT32) *pCodeLEC;
CodeLEC = get_word(&HuffCodeLEC[IndexLEC * 2]);
if (BitLength > 15)
return -1014;
NCrushWriteBits(CodeLEC, BitLength);
NCrushWriteBits(&DstPtr, &accumulator, &offset, CodeLEC, BitLength);
}
if ((DstPtr + 4) >= DstEndPtr) /* PACKET_FLUSH #4 */
@ -2580,13 +2580,9 @@ int ncrush_compress(NCRUSH_CONTEXT* ncrush, BYTE* pSrcData, UINT32 SrcSize, BYTE
if (BitLength > 15)
return -1015;
pCodeLEC = (UINT16*) &HuffCodeLEC[IndexLEC * 2];
bits = (UINT32) *pCodeLEC;
NCrushWriteBits(bits, BitLength);
NCrushWriteFinish();
bits = get_word(&HuffCodeLEC[IndexLEC * 2]);
NCrushWriteBits(&DstPtr, &accumulator, &offset, bits, BitLength);
NCrushWriteFinish(&DstPtr, accumulator);
*pDstSize = DstPtr - pDstData;
if (*pDstSize > SrcSize)
@ -2609,11 +2605,11 @@ int ncrush_compress(NCRUSH_CONTEXT* ncrush, BYTE* pSrcData, UINT32 SrcSize, BYTE
return 1;
}
int ncrush_generate_tables(NCRUSH_CONTEXT *context)
static int ncrush_generate_tables(NCRUSH_CONTEXT* context)
{
int i, j, k, l;
k = 0;
for (i = 0; i < 28; i++)
{
for (j = 0; j < 1 << LOMBitsLUT[i]; j++)
@ -2635,6 +2631,7 @@ int ncrush_generate_tables(NCRUSH_CONTEXT *context)
}
k = 0;
for (i = 0; i < 16; i++)
{
for (j = 0; j < 1 << CopyOffsetBitsLUT[i]; j++)
@ -2645,6 +2642,7 @@ int ncrush_generate_tables(NCRUSH_CONTEXT *context)
}
k /= 128;
for (i = 16; i < 32; i++)
{
for (j = 0; j < 1 << (CopyOffsetBitsLUT[i] - 7); j++)
@ -2664,7 +2662,6 @@ void ncrush_context_reset(NCRUSH_CONTEXT* ncrush, BOOL flush)
{
ZeroMemory(&(ncrush->HistoryBuffer), sizeof(ncrush->HistoryBuffer));
ZeroMemory(&(ncrush->OffsetCache), sizeof(ncrush->OffsetCache));
ZeroMemory(&(ncrush->MatchTable), sizeof(ncrush->MatchTable));
ZeroMemory(&(ncrush->HashTable), sizeof(ncrush->HashTable));
@ -2679,21 +2676,16 @@ void ncrush_context_reset(NCRUSH_CONTEXT* ncrush, BOOL flush)
NCRUSH_CONTEXT* ncrush_context_new(BOOL Compressor)
{
NCRUSH_CONTEXT* ncrush;
ncrush = (NCRUSH_CONTEXT*) calloc(1, sizeof(NCRUSH_CONTEXT));
if (ncrush)
{
ncrush->Compressor = Compressor;
ZeroMemory(&(ncrush->OffsetCache), sizeof(ncrush->OffsetCache));
ncrush->HistoryBufferSize = 65536;
ncrush->HistoryEndOffset = ncrush->HistoryBufferSize - 1;
ZeroMemory(&(ncrush->HistoryBuffer), sizeof(ncrush->HistoryBuffer));
ncrush->HistoryBufferFence = 0xABABABAB;
ncrush->HistoryOffset = 0;
ncrush->HistoryPtr = &(ncrush->HistoryBuffer[ncrush->HistoryOffset]);

32
libfreerdp/codec/test/TestFreeRDPCodecNCrush.c
View File

@ -10,9 +10,9 @@ static const BYTE TEST_BELLS_NCRUSH[] =
"\xef\xb5\xef\x21\x87\xd0\xc5\xe1\x85\x71\xd4\x10\x16\xe7\xda\xfb"
"\x1d\x7e\xe4\xda\x47\x1f\xb0\xef\xbe\xbd\xff\x2f";
static int test_NCrushCompressBells(void)
static BOOL test_NCrushCompressBells(void)
{
int rc = -1;
BOOL rc = FALSE;
int status;
UINT32 Flags;
UINT32 SrcSize;
@ -22,8 +22,9 @@ static int test_NCrushCompressBells(void)
UINT32 expectedSize;
BYTE OutputBuffer[65536];
NCRUSH_CONTEXT* ncrush = ncrush_context_new(TRUE);
if (!ncrush)
return -1;
return rc;
SrcSize = sizeof(TEST_BELLS_DATA) - 1;
pSrcData = (BYTE*) TEST_BELLS_DATA;
@ -32,13 +33,16 @@ static int test_NCrushCompressBells(void)
DstSize = sizeof(OutputBuffer);
ZeroMemory(OutputBuffer, sizeof(OutputBuffer));
status = ncrush_compress(ncrush, pSrcData, SrcSize, &pDstData, &DstSize, &Flags);
if (status < 0)
goto fail;
printf("status: %d Flags: 0x%08"PRIX32" DstSize: %"PRIu32"\n", status, Flags, DstSize);
if (DstSize != expectedSize)
{
printf("NCrushCompressBells: output size mismatch: Actual: %"PRIu32", Expected: %"PRIu32"\n", DstSize, expectedSize);
printf("NCrushCompressBells: output size mismatch: Actual: %"PRIu32", Expected: %"PRIu32"\n",
DstSize, expectedSize);
printf("Actual\n");
BitDump(__FUNCTION__, WLOG_INFO, pDstData, DstSize * 8, 0);
printf("Expected\n");
@ -56,16 +60,15 @@ static int test_NCrushCompressBells(void)
goto fail;
}
rc = 1;
rc = TRUE;
fail:
ncrush_context_free(ncrush);
return rc;
}
static int test_NCrushDecompressBells(void)
static BOOL test_NCrushDecompressBells(void)
{
int rc = -1;
BOOL rc = FALSE;
int status;
UINT32 Flags;
BYTE* pSrcData;
@ -76,13 +79,14 @@ static int test_NCrushDecompressBells(void)
NCRUSH_CONTEXT* ncrush = ncrush_context_new(FALSE);
if (!ncrush)
return -1;
return rc;
SrcSize = sizeof(TEST_BELLS_NCRUSH) - 1;
pSrcData = (BYTE*) TEST_BELLS_NCRUSH;
Flags = PACKET_COMPRESSED | 2;
expectedSize = sizeof(TEST_BELLS_DATA) - 1;
status = ncrush_decompress(ncrush, pSrcData, SrcSize, &pDstData, &DstSize, Flags);
if (status < 0)
goto fail;
@ -90,7 +94,8 @@ static int test_NCrushDecompressBells(void)
if (DstSize != expectedSize)
{
printf("NCrushDecompressBells: output size mismatch: Actual: %"PRIu32", Expected: %"PRIu32"\n", DstSize, expectedSize);
printf("NCrushDecompressBells: output size mismatch: Actual: %"PRIu32", Expected: %"PRIu32"\n",
DstSize, expectedSize);
goto fail;
}
@ -100,8 +105,7 @@ static int test_NCrushDecompressBells(void)
goto fail;
}
rc = 1;
rc = TRUE;
fail:
ncrush_context_free(ncrush);
return rc;
@ -109,10 +113,10 @@ fail:
int TestFreeRDPCodecNCrush(int argc, char* argv[])
{
if (test_NCrushCompressBells() < 0)
if (!test_NCrushCompressBells())
return -1;
if (test_NCrushDecompressBells() < 0)
if (!test_NCrushDecompressBells())
return -1;
return 0;