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// ****************************************************************************
// Project: GUYMAGER
// ****************************************************************************
// Programmer: Guy Voncken
// Police Grand-Ducale
// Service de Police Judiciaire
// Section Nouvelles Technologies
// ****************************************************************************
// Module: Multi-threaded compression
// ****************************************************************************
// Copyright 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017,
// 2018, 2019, 2020
// Guy Voncken
//
// This file is part of Guymager.
//
// Guymager is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 2 of the License, or
// (at your option) any later version.
//
// Guymager is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Guymager. If not, see <http://www.gnu.org/licenses/>.
#include <QtCore>
#include "common.h"
#include "device.h"
#include "threadcompress.h"
#include "threadwrite.h"
#include "config.h"
#include "aaff.h"
#include "util.h"
class t_ThreadCompressLocal
{
public:
t_pDevice pDevice;
int ThreadNr;
};
t_ThreadCompress::t_ThreadCompress (void)
{
CHK_EXIT (ERROR_THREADCOMPRESS_CONSTRUCTOR_NOT_SUPPORTED)
} //lint !e1401 not initialised
t_ThreadCompress::t_ThreadCompress (t_pDevice pDevice, int ThreadNr)
{
static bool Initialised = false;
if (!Initialised)
{
CHK_EXIT (TOOL_ERROR_REGISTER_CODE (ERROR_THREADCOMPRESS_CONSTRUCTOR_NOT_SUPPORTED))
CHK_EXIT (TOOL_ERROR_REGISTER_CODE (ERROR_THREADCOMPRESS_ZLIB_FAILED))
CHK_EXIT (TOOL_ERROR_REGISTER_CODE (ERROR_THREADCOMPRESS_LIBEWF_FAILED))
CHK_EXIT (TOOL_ERROR_REGISTER_CODE (ERROR_THREADCOMPRESS_COMPRESSION_BUFFER_TOO_SMALL))
CHK_EXIT (TOOL_ERROR_REGISTER_CODE (ERROR_THREADCOMPRESS_INVALID_FORMAT))
Initialised = true;
}
pOwn = new t_ThreadCompressLocal;
pOwn->pDevice = pDevice;
pOwn->ThreadNr = ThreadNr;
CHK_QT_EXIT (connect (this, SIGNAL(finished()), this, SLOT(SlotFinished())))
}
t_ThreadCompress::~t_ThreadCompress (void)
{
delete pOwn;
}
APIRET t_ThreadCompress::GetFifoExtraSpace (t_pDevice pDevice, unsigned int *pExtraSpace)
{
unsigned int ExtraSpace;
unsigned int ExtraZ;
ExtraZ = UtilGetMaxZcompressedBufferSize (pDevice->FifoBlockSize) - pDevice->FifoBlockSize;
switch (pDevice->Acquisition1.Format)
{
case t_File::DD : ExtraSpace = 0; break;
case t_File::AAFF: ExtraSpace = AaffPreprocessExtraSpace(pDevice->FifoBlockSize); break;
case t_File::EWF:
if (CONFIG(EwfFormat) == t_File::AEWF)
ExtraSpace = AewfPreprocessExtraSpace(pDevice->FifoBlockSize);
else ExtraSpace = ExtraZ;
break;
default: CHK (ERROR_THREADCOMPRESS_INVALID_FORMAT)
}
*pExtraSpace = ExtraSpace;
return NO_ERROR;
}
void t_ThreadCompress::run (void)
{
t_pDevice pDevice;
t_pFifoStd pFifoIn;
t_pFifoStd pFifoOut;
t_pFifoBlock pFifoBlockIn;
t_pFifoBlock pFifoBlockOut;
bool Finished = false;
quint64 Blocks = 0;
const int SubFifoNr = pOwn->ThreadNr;
#if (ENABLE_LIBEWF)
size_t CompressedMaxSize = 0;
size_t CompressedSize = 0;
ssize_t rc;
LIBEWF_HANDLE *pEwfHandle = nullptr;
#endif
LOG_INFO ("[%s] Compression thread #%d started", QSTR_TO_PSZ (pOwn->pDevice->LinuxDevice), pOwn->ThreadNr)
CHK_EXIT (SetDebugMessage ("Start run function"))
pDevice = pOwn->pDevice;
#if (ENABLE_LIBEWF)
if (pDevice->Acquisition1.Format == t_File::EWF)
{
CompressedMaxSize = (size_t) (pDevice->FifoBlockSize * 1.001) + 12; // see zlib documentation
if (CONFIG(EwfFormat) != t_File::AEWF)
{
void *pHandle;
CHK_EXIT (pDevice->pThreadWrite1->GetpFileHandle (&pHandle)) // This handle is the reason why libewf can't
pEwfHandle = (LIBEWF_HANDLE *) pHandle; // be used together with image duplication
}
}
#endif
CHK_EXIT (pDevice->pFifoCompressIn ->GetSubFifo (SubFifoNr, pFifoIn ))
CHK_EXIT (pDevice->pFifoCompressOut->GetSubFifo (SubFifoNr, pFifoOut))
while (!Finished && !pDevice->Error.Abort())
{
CHK_EXIT (SetDebugMessage ("Wait for block"))
CHK_EXIT (pFifoIn->Get (pFifoBlockIn))
CHK_EXIT (SetDebugMessage ("Process block"))
if (pFifoBlockIn)
{
Blocks++;
CHK_EXIT (t_Fifo::Create (pDevice->pFifoMemory, pFifoBlockOut, pDevice->FifoAllocBlockSize))
pFifoBlockOut->Nr = pFifoBlockIn->Nr;
pFifoBlockOut->DataSize = pFifoBlockIn->DataSize;
switch (pDevice->Acquisition1.Format)
{
case t_File::EWF:
if (CONFIG(EwfFormat) == t_File::AEWF)
{
CHK_EXIT (AewfPreprocess (&pFifoBlockOut->AewfPreprocess, pFifoBlockIn ->Buffer, pFifoBlockIn ->DataSize,
pFifoBlockOut->Buffer, pFifoBlockOut->BufferSize))
if (pFifoBlockOut->AewfPreprocess.Compressed)
{
CHK_EXIT (t_Fifo::Destroy (pDevice->pFifoMemory, pFifoBlockIn))
}
else
{
pFifoBlockIn->AewfPreprocess = pFifoBlockOut->AewfPreprocess;
CHK_EXIT (t_Fifo::Destroy (pDevice->pFifoMemory, pFifoBlockOut))
pFifoBlockOut = pFifoBlockIn;
}
break;
}
#if (ENABLE_LIBEWF)
else
{
CompressedSize = CompressedMaxSize; // Must be initialised with the max buffer size (we use this one instead of MULTITHREADED_COMPRESSION_FIFO_BLOCK_SIZE in order to check if it works as written in the zlib docu)
#if (LIBEWF_VERSION < 20130416)
rc = libewf_raw_write_prepare_buffer (pEwfHandle, pFifoBlockIn ->Buffer, pFifoBlockIn->DataSize,
pFifoBlockOut->Buffer, &CompressedSize,
&pFifoBlockOut->EwfCompressionUsed,
&pFifoBlockOut->EwfChunkCRC,
&pFifoBlockOut->EwfWriteCRC);
#else
rc = libewf_handle_prepare_write_chunk(pEwfHandle, pFifoBlockIn ->Buffer, pFifoBlockIn->DataSize,
pFifoBlockOut->Buffer, &CompressedSize,
&pFifoBlockOut->EwfCompressionUsed,
&pFifoBlockOut->EwfChunkCRC,
&pFifoBlockOut->EwfWriteCRC, nullptr);
#endif
if (pFifoBlockOut->EwfCompressionUsed)
{
pFifoBlockOut->EwfDataSize = CompressedSize; // Data to be forwarded is contained in
CHK_EXIT (t_Fifo::Destroy (pDevice->pFifoMemory, pFifoBlockIn)) // pFifoBlockOut, pFifoBlockIn no longer needed.
}
else
{
pFifoBlockIn->EwfDataSize = pFifoBlockIn ->DataSize;
pFifoBlockIn->EwfCompressionUsed = pFifoBlockOut->EwfCompressionUsed;
pFifoBlockIn->EwfChunkCRC = pFifoBlockOut->EwfChunkCRC;
pFifoBlockIn->EwfWriteCRC = pFifoBlockOut->EwfWriteCRC;
CHK_EXIT (t_Fifo::Destroy (pDevice->pFifoMemory, pFifoBlockOut)) // No compression, we'll forward the
pFifoBlockOut = pFifoBlockIn; // original block we received
}
if (rc != (ssize_t) pFifoBlockOut->EwfDataSize)
{
LOG_INFO ("[%s] libewf_raw_write_prepare_buffer returned %d. DataSize=%u, CompressedMaxSize=%zd, CompressedSize=%zd, EwfCompressionUsed=%d",
QSTR_TO_PSZ (pOwn->pDevice->LinuxDevice), (int)rc,
pFifoBlockOut->DataSize, CompressedMaxSize, CompressedSize, pFifoBlockOut->EwfCompressionUsed)
CHK_EXIT (ERROR_THREADCOMPRESS_LIBEWF_FAILED)
}
pFifoBlockOut->EwfPreprocessed = true;
}
#endif
break;
case t_File::AAFF:
CHK_EXIT (AaffPreprocess (&pFifoBlockOut->AaffPreprocess, pFifoBlockIn->Buffer, pFifoBlockIn->DataSize, pFifoBlockOut->Buffer, pFifoBlockOut->BufferSize))
if (pFifoBlockOut->AaffPreprocess.Compressed)
{
CHK_EXIT (t_Fifo::Destroy (pDevice->pFifoMemory, pFifoBlockIn))
}
else
{
pFifoBlockIn->AaffPreprocess = pFifoBlockOut->AaffPreprocess;
CHK_EXIT (t_Fifo::Destroy (pDevice->pFifoMemory, pFifoBlockOut))
pFifoBlockOut = pFifoBlockIn;
}
break;
default:
CHK_EXIT (ERROR_THREADCOMPRESS_INVALID_FORMAT)
}
CHK_EXIT (pFifoOut->Insert (pFifoBlockOut))
}
else
{
LOG_INFO ("[%s] Dummy block", QSTR_TO_PSZ (pOwn->pDevice->LinuxDevice))
Finished = true;
}
}
if ((pDevice->Acquisition1.Format == t_File::EWF) && (CONFIG(EwfFormat) != t_File::AEWF))
CHK_EXIT (pDevice->pThreadWrite1->ReleaseFileHandle ())
LOG_INFO ("[%s] Compression thread #%d exits now - %lld blocks processed", QSTR_TO_PSZ (pOwn->pDevice->LinuxDevice), pOwn->ThreadNr, Blocks)
CHK_EXIT (SetDebugMessage ("Exit run function"))
}
void t_ThreadCompress::SlotFinished (void)
{
emit SignalEnded (pOwn->pDevice, pOwn->ThreadNr);
}
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