mirror of
https://github.com/WinampDesktop/winamp.git
synced 2024-12-18 18:36:00 +01:00
430 lines
7.5 KiB
C++
430 lines
7.5 KiB
C++
/*
|
|
* ContainerXPK.cpp
|
|
* ----------------
|
|
* Purpose: Handling of XPK compressed modules
|
|
* Notes : (currently none)
|
|
* Authors: Olivier Lapicque
|
|
* OpenMPT Devs
|
|
* The OpenMPT source code is released under the BSD license. Read LICENSE for more details.
|
|
*/
|
|
|
|
|
|
#include "stdafx.h"
|
|
|
|
#include "../common/FileReader.h"
|
|
#include "Container.h"
|
|
#include "Sndfile.h"
|
|
|
|
#include <stdexcept>
|
|
|
|
|
|
OPENMPT_NAMESPACE_BEGIN
|
|
|
|
|
|
#if !defined(MPT_WITH_ANCIENT)
|
|
|
|
|
|
#ifdef MPT_ALL_LOGGING
|
|
#define MMCMP_LOG
|
|
#endif
|
|
|
|
|
|
struct XPKFILEHEADER
|
|
{
|
|
char XPKF[4];
|
|
uint32be SrcLen;
|
|
char SQSH[4];
|
|
uint32be DstLen;
|
|
char Name[16];
|
|
uint32be Reserved;
|
|
};
|
|
|
|
MPT_BINARY_STRUCT(XPKFILEHEADER, 36)
|
|
|
|
|
|
struct XPK_error : public std::range_error
|
|
{
|
|
XPK_error() : std::range_error("invalid XPK data") { }
|
|
};
|
|
|
|
struct XPK_BufferBounds
|
|
{
|
|
const uint8 *pSrcBeg;
|
|
std::size_t SrcSize;
|
|
|
|
inline uint8 SrcRead(std::size_t index)
|
|
{
|
|
if(index >= SrcSize) throw XPK_error();
|
|
return pSrcBeg[index];
|
|
}
|
|
};
|
|
|
|
static int32 bfextu(std::size_t p, int32 bo, int32 bc, XPK_BufferBounds &bufs)
|
|
{
|
|
uint32 r;
|
|
|
|
p += bo / 8;
|
|
r = bufs.SrcRead(p); p++;
|
|
r <<= 8;
|
|
r |= bufs.SrcRead(p); p++;
|
|
r <<= 8;
|
|
r |= bufs.SrcRead(p);
|
|
r <<= bo % 8;
|
|
r &= 0xffffff;
|
|
r >>= 24 - bc;
|
|
|
|
return r;
|
|
}
|
|
|
|
static int32 bfexts(std::size_t p, int32 bo, int32 bc, XPK_BufferBounds &bufs)
|
|
{
|
|
uint32 r;
|
|
|
|
p += bo / 8;
|
|
r = bufs.SrcRead(p); p++;
|
|
r <<= 8;
|
|
r |= bufs.SrcRead(p); p++;
|
|
r <<= 8;
|
|
r |= bufs.SrcRead(p);
|
|
r <<= (bo % 8) + 8;
|
|
return mpt::rshift_signed(static_cast<int32>(r), 32 - bc);
|
|
}
|
|
|
|
|
|
static uint8 XPK_ReadTable(int32 index)
|
|
{
|
|
static constexpr uint8 xpk_table[] = {
|
|
2,3,4,5,6,7,8,0,3,2,4,5,6,7,8,0,4,3,5,2,6,7,8,0,5,4,6,2,3,7,8,0,6,5,7,2,3,4,8,0,7,6,8,2,3,4,5,0,8,7,6,2,3,4,5,0
|
|
};
|
|
if(index < 0) throw XPK_error();
|
|
if(static_cast<std::size_t>(index) >= std::size(xpk_table)) throw XPK_error();
|
|
return xpk_table[index];
|
|
}
|
|
|
|
static bool XPK_DoUnpack(const uint8 *src_, uint32 srcLen, std::vector<char> &unpackedData, int32 len)
|
|
{
|
|
if(len <= 0) return false;
|
|
int32 d0,d1,d2,d3,d4,d5,d6,a2,a5;
|
|
int32 cp, cup1, type;
|
|
std::size_t c;
|
|
std::size_t src;
|
|
std::size_t phist = 0;
|
|
|
|
unpackedData.reserve(std::min(static_cast<uint32>(len), std::min(srcLen, uint32_max / 20u) * 20u));
|
|
|
|
XPK_BufferBounds bufs;
|
|
bufs.pSrcBeg = src_;
|
|
bufs.SrcSize = srcLen;
|
|
|
|
src = 0;
|
|
c = src;
|
|
while(len > 0)
|
|
{
|
|
type = bufs.SrcRead(c+0);
|
|
cp = (bufs.SrcRead(c+4)<<8) | (bufs.SrcRead(c+5)); // packed
|
|
cup1 = (bufs.SrcRead(c+6)<<8) | (bufs.SrcRead(c+7)); // unpacked
|
|
//Log(" packed=%6d unpacked=%6d bytes left=%d dst=%08X(%d)\n", cp, cup1, len, dst, dst);
|
|
c += 8;
|
|
src = c+2;
|
|
if (type == 0)
|
|
{
|
|
// RAW chunk
|
|
if(cp < 0 || cp > len) throw XPK_error();
|
|
for(int32 i = 0; i < cp; ++i)
|
|
{
|
|
unpackedData.push_back(bufs.SrcRead(c + i));
|
|
}
|
|
c+=cp;
|
|
len -= cp;
|
|
continue;
|
|
}
|
|
|
|
if (type != 1)
|
|
{
|
|
#ifdef MMCMP_LOG
|
|
MPT_LOG_GLOBAL(LogDebug, "XPK", MPT_UFORMAT("Invalid XPK type! ({} bytes left)")(len));
|
|
#endif
|
|
break;
|
|
}
|
|
LimitMax(cup1, len);
|
|
len -= cup1;
|
|
cp = (cp + 3) & 0xfffc;
|
|
c += cp;
|
|
|
|
d0 = d1 = d2 = a2 = 0;
|
|
d3 = bufs.SrcRead(src); src++;
|
|
unpackedData.push_back(static_cast<char>(d3));
|
|
cup1--;
|
|
|
|
while (cup1 > 0)
|
|
{
|
|
if (d1 >= 8) goto l6dc;
|
|
if (bfextu(src,d0,1,bufs)) goto l75a;
|
|
d0 += 1;
|
|
d5 = 0;
|
|
d6 = 8;
|
|
goto l734;
|
|
|
|
l6dc:
|
|
if (bfextu(src,d0,1,bufs)) goto l726;
|
|
d0 += 1;
|
|
if (! bfextu(src,d0,1,bufs)) goto l75a;
|
|
d0 += 1;
|
|
if (bfextu(src,d0,1,bufs)) goto l6f6;
|
|
d6 = 2;
|
|
goto l708;
|
|
|
|
l6f6:
|
|
d0 += 1;
|
|
if (!bfextu(src,d0,1,bufs)) goto l706;
|
|
d6 = bfextu(src,d0,3,bufs);
|
|
d0 += 3;
|
|
goto l70a;
|
|
|
|
l706:
|
|
d6 = 3;
|
|
l708:
|
|
d0 += 1;
|
|
l70a:
|
|
d6 = XPK_ReadTable((8*a2) + d6 -17);
|
|
if (d6 != 8) goto l730;
|
|
l718:
|
|
if (d2 >= 20)
|
|
{
|
|
d5 = 1;
|
|
goto l732;
|
|
}
|
|
d5 = 0;
|
|
goto l734;
|
|
|
|
l726:
|
|
d0 += 1;
|
|
d6 = 8;
|
|
if (d6 == a2) goto l718;
|
|
d6 = a2;
|
|
l730:
|
|
d5 = 4;
|
|
l732:
|
|
d2 += 8;
|
|
l734:
|
|
while ((d5 >= 0) && (cup1 > 0))
|
|
{
|
|
d4 = bfexts(src,d0,d6,bufs);
|
|
d0 += d6;
|
|
d3 -= d4;
|
|
unpackedData.push_back(static_cast<char>(d3));
|
|
cup1--;
|
|
d5--;
|
|
}
|
|
if (d1 != 31) d1++;
|
|
a2 = d6;
|
|
l74c:
|
|
d6 = d2;
|
|
d6 >>= 3;
|
|
d2 -= d6;
|
|
}
|
|
}
|
|
return !unpackedData.empty();
|
|
|
|
l75a:
|
|
d0 += 1;
|
|
if (bfextu(src,d0,1,bufs)) goto l766;
|
|
d4 = 2;
|
|
goto l79e;
|
|
|
|
l766:
|
|
d0 += 1;
|
|
if (bfextu(src,d0,1,bufs)) goto l772;
|
|
d4 = 4;
|
|
goto l79e;
|
|
|
|
l772:
|
|
d0 += 1;
|
|
if (bfextu(src,d0,1,bufs)) goto l77e;
|
|
d4 = 6;
|
|
goto l79e;
|
|
|
|
l77e:
|
|
d0 += 1;
|
|
if (bfextu(src,d0,1,bufs)) goto l792;
|
|
d0 += 1;
|
|
d6 = bfextu(src,d0,3,bufs);
|
|
d0 += 3;
|
|
d6 += 8;
|
|
goto l7a8;
|
|
|
|
l792:
|
|
d0 += 1;
|
|
d6 = bfextu(src,d0,5,bufs);
|
|
d0 += 5;
|
|
d4 = 16;
|
|
goto l7a6;
|
|
|
|
l79e:
|
|
d0 += 1;
|
|
d6 = bfextu(src,d0,1,bufs);
|
|
d0 += 1;
|
|
l7a6:
|
|
d6 += d4;
|
|
l7a8:
|
|
if(bfextu(src, d0, 1, bufs))
|
|
{
|
|
d5 = 12;
|
|
a5 = -0x100;
|
|
} else
|
|
{
|
|
d0 += 1;
|
|
if(bfextu(src, d0, 1, bufs))
|
|
{
|
|
d5 = 14;
|
|
a5 = -0x1100;
|
|
} else
|
|
{
|
|
d5 = 8;
|
|
a5 = 0;
|
|
}
|
|
}
|
|
|
|
d0 += 1;
|
|
d4 = bfextu(src,d0,d5,bufs);
|
|
d0 += d5;
|
|
d6 -= 3;
|
|
if (d6 >= 0)
|
|
{
|
|
if (d6 > 0) d1 -= 1;
|
|
d1 -= 1;
|
|
if (d1 < 0) d1 = 0;
|
|
}
|
|
d6 += 2;
|
|
phist = unpackedData.size() + a5 - d4 - 1;
|
|
if(phist >= unpackedData.size())
|
|
throw XPK_error();
|
|
|
|
while ((d6 >= 0) && (cup1 > 0))
|
|
{
|
|
d3 = unpackedData[phist];
|
|
phist++;
|
|
unpackedData.push_back(static_cast<char>(d3));
|
|
cup1--;
|
|
d6--;
|
|
}
|
|
goto l74c;
|
|
}
|
|
|
|
|
|
static bool ValidateHeader(const XPKFILEHEADER &header)
|
|
{
|
|
if(std::memcmp(header.XPKF, "XPKF", 4) != 0)
|
|
{
|
|
return false;
|
|
}
|
|
if(std::memcmp(header.SQSH, "SQSH", 4) != 0)
|
|
{
|
|
return false;
|
|
}
|
|
if(header.SrcLen == 0)
|
|
{
|
|
return false;
|
|
}
|
|
if(header.DstLen == 0)
|
|
{
|
|
return false;
|
|
}
|
|
static_assert(sizeof(XPKFILEHEADER) >= 8);
|
|
if(header.SrcLen < (sizeof(XPKFILEHEADER) - 8))
|
|
{
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
|
|
static bool ValidateHeaderFileSize(const XPKFILEHEADER &header, uint64 filesize)
|
|
{
|
|
if(filesize < header.SrcLen - 8)
|
|
{
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
|
|
CSoundFile::ProbeResult CSoundFile::ProbeFileHeaderXPK(MemoryFileReader file, const uint64 *pfilesize)
|
|
{
|
|
XPKFILEHEADER header;
|
|
if(!file.ReadStruct(header))
|
|
{
|
|
return ProbeWantMoreData;
|
|
}
|
|
if(!ValidateHeader(header))
|
|
{
|
|
return ProbeFailure;
|
|
}
|
|
if(pfilesize)
|
|
{
|
|
if(!ValidateHeaderFileSize(header, *pfilesize))
|
|
{
|
|
return ProbeFailure;
|
|
}
|
|
}
|
|
return ProbeSuccess;
|
|
}
|
|
|
|
|
|
bool UnpackXPK(std::vector<ContainerItem> &containerItems, FileReader &file, ContainerLoadingFlags loadFlags)
|
|
{
|
|
file.Rewind();
|
|
containerItems.clear();
|
|
|
|
XPKFILEHEADER header;
|
|
if(!file.ReadStruct(header))
|
|
{
|
|
return false;
|
|
}
|
|
if(!ValidateHeader(header))
|
|
{
|
|
return false;
|
|
}
|
|
if(loadFlags == ContainerOnlyVerifyHeader)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
if(!file.CanRead(header.SrcLen - (sizeof(XPKFILEHEADER) - 8)))
|
|
{
|
|
return false;
|
|
}
|
|
|
|
containerItems.emplace_back();
|
|
containerItems.back().data_cache = std::make_unique<std::vector<char> >();
|
|
std::vector<char> & unpackedData = *(containerItems.back().data_cache);
|
|
|
|
#ifdef MMCMP_LOG
|
|
MPT_LOG_GLOBAL(LogDebug, "XPK", MPT_UFORMAT("XPK detected (SrcLen={} DstLen={}) filesize={}")(static_cast<uint32>(header.SrcLen), static_cast<uint32>(header.DstLen), file.GetLength()));
|
|
#endif
|
|
bool result = false;
|
|
try
|
|
{
|
|
result = XPK_DoUnpack(file.GetRawData<uint8>().data(), header.SrcLen - (sizeof(XPKFILEHEADER) - 8), unpackedData, header.DstLen);
|
|
} catch(mpt::out_of_memory e)
|
|
{
|
|
mpt::delete_out_of_memory(e);
|
|
return false;
|
|
} catch(const XPK_error &)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
if(result)
|
|
{
|
|
containerItems.back().file = FileReader(mpt::byte_cast<mpt::const_byte_span>(mpt::as_span(unpackedData)));
|
|
}
|
|
return result;
|
|
}
|
|
|
|
|
|
#endif // !MPT_WITH_ANCIENT
|
|
|
|
|
|
OPENMPT_NAMESPACE_END
|