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// FilterCoder.cpp
#include "StdAfx.h"
#include "../../../C/Alloc.h"
#include "../../Common/Defs.h"
#include "FilterCoder.h"
#include "StreamUtils.h"
static const UInt32 kBufferSize = 1 << 17;
CFilterCoder::CFilterCoder()
{
_buffer = (Byte *)::MidAlloc(kBufferSize);
if (_buffer == 0)
throw 1;
}
CFilterCoder::~CFilterCoder()
{
::MidFree(_buffer);
}
HRESULT CFilterCoder::WriteWithLimit(ISequentialOutStream *outStream, UInt32 size)
{
if (_outSizeIsDefined)
{
UInt64 remSize = _outSize - _nowPos64;
if (size > remSize)
size = (UInt32)remSize;
}
RINOK(WriteStream(outStream, _buffer, size));
_nowPos64 += size;
return S_OK;
}
STDMETHODIMP CFilterCoder::Code(ISequentialInStream *inStream, ISequentialOutStream *outStream,
const UInt64 * /* inSize */, const UInt64 *outSize, ICompressProgressInfo *progress)
{
RINOK(Init());
UInt32 bufferPos = 0;
_outSizeIsDefined = (outSize != 0);
if (_outSizeIsDefined)
_outSize = *outSize;
while (!_outSizeIsDefined || _nowPos64 < _outSize)
{
size_t processedSize = kBufferSize - bufferPos;
// Change it: It can be optimized using ReadPart
RINOK(ReadStream(inStream, _buffer + bufferPos, &processedSize));
UInt32 endPos = bufferPos + (UInt32)processedSize;
bufferPos = Filter->Filter(_buffer, endPos);
if (bufferPos > endPos)
{
for (; endPos < bufferPos; endPos++)
_buffer[endPos] = 0;
bufferPos = Filter->Filter(_buffer, endPos);
}
if (bufferPos == 0)
{
if (endPos == 0)
return S_OK;
return WriteWithLimit(outStream, endPos);
}
RINOK(WriteWithLimit(outStream, bufferPos));
if (progress != NULL)
{
RINOK(progress->SetRatioInfo(&_nowPos64, &_nowPos64));
}
UInt32 i = 0;
while (bufferPos < endPos)
_buffer[i++] = _buffer[bufferPos++];
bufferPos = i;
}
return S_OK;
}
STDMETHODIMP CFilterCoder::SetOutStream(ISequentialOutStream *outStream)
{
_bufferPos = 0;
_outStream = outStream;
return Init();
}
STDMETHODIMP CFilterCoder::ReleaseOutStream()
{
_outStream.Release();
return S_OK;
}
STDMETHODIMP CFilterCoder::Write(const void *data, UInt32 size, UInt32 *processedSize)
{
if (processedSize != NULL)
*processedSize = 0;
while (size > 0)
{
UInt32 sizeTemp = MyMin(size, kBufferSize - _bufferPos);
memcpy(_buffer + _bufferPos, data, sizeTemp);
size -= sizeTemp;
if (processedSize != NULL)
*processedSize += sizeTemp;
data = (const Byte *)data + sizeTemp;
UInt32 endPos = _bufferPos + sizeTemp;
_bufferPos = Filter->Filter(_buffer, endPos);
if (_bufferPos == 0)
{
_bufferPos = endPos;
break;
}
if (_bufferPos > endPos)
{
if (size != 0)
return E_FAIL;
break;
}
RINOK(WriteWithLimit(_outStream, _bufferPos));
UInt32 i = 0;
while (_bufferPos < endPos)
_buffer[i++] = _buffer[_bufferPos++];
_bufferPos = i;
}
return S_OK;
}
STDMETHODIMP CFilterCoder::Flush()
{
if (_bufferPos != 0)
{
// _buffer contains only data refused by previous Filter->Filter call.
UInt32 endPos = Filter->Filter(_buffer, _bufferPos);
if (endPos > _bufferPos)
{
for (; _bufferPos < endPos; _bufferPos++)
_buffer[_bufferPos] = 0;
if (Filter->Filter(_buffer, endPos) != endPos)
return E_FAIL;
}
RINOK(WriteWithLimit(_outStream, _bufferPos));
_bufferPos = 0;
}
CMyComPtr<IOutStreamFlush> flush;
_outStream.QueryInterface(IID_IOutStreamFlush, &flush);
if (flush)
return flush->Flush();
return S_OK;
}
void CFilterCoder::SetInStream_NoSubFilterInit(ISequentialInStream *inStream)
{
_convertedPosBegin = _convertedPosEnd = _bufferPos = 0;
_inStream = inStream;
Init2();
}
STDMETHODIMP CFilterCoder::SetInStream(ISequentialInStream *inStream)
{
SetInStream_NoSubFilterInit(inStream);
return Init();
}
STDMETHODIMP CFilterCoder::ReleaseInStream()
{
_inStream.Release();
return S_OK;
}
STDMETHODIMP CFilterCoder::Read(void *data, UInt32 size, UInt32 *processedSize)
{
if (processedSize != NULL)
*processedSize = 0;
while (size > 0)
{
if (_convertedPosBegin != _convertedPosEnd)
{
UInt32 sizeTemp = MyMin(size, _convertedPosEnd - _convertedPosBegin);
memcpy(data, _buffer + _convertedPosBegin, sizeTemp);
_convertedPosBegin += sizeTemp;
data = (void *)((Byte *)data + sizeTemp);
size -= sizeTemp;
if (processedSize != NULL)
*processedSize += sizeTemp;
break;
}
UInt32 i;
for (i = 0; _convertedPosEnd + i < _bufferPos; i++)
_buffer[i] = _buffer[_convertedPosEnd + i];
_bufferPos = i;
_convertedPosBegin = _convertedPosEnd = 0;
size_t processedSizeTemp = kBufferSize - _bufferPos;
RINOK(ReadStream(_inStream, _buffer + _bufferPos, &processedSizeTemp));
_bufferPos += (UInt32)processedSizeTemp;
_convertedPosEnd = Filter->Filter(_buffer, _bufferPos);
if (_convertedPosEnd == 0)
{
if (_bufferPos == 0)
break;
_convertedPosEnd = _bufferPos; // check it
continue;
}
if (_convertedPosEnd > _bufferPos)
{
for (; _bufferPos < _convertedPosEnd; _bufferPos++)
_buffer[_bufferPos] = 0;
_convertedPosEnd = Filter->Filter(_buffer, _bufferPos);
}
}
return S_OK;
}
#ifndef _NO_CRYPTO
STDMETHODIMP CFilterCoder::CryptoSetPassword(const Byte *data, UInt32 size)
{
return _setPassword->CryptoSetPassword(data, size);
}
STDMETHODIMP CFilterCoder::SetKey(const Byte *data, UInt32 size)
{
return _cryptoProperties->SetKey(data, size);
}
STDMETHODIMP CFilterCoder::SetInitVector(const Byte *data, UInt32 size)
{
return _cryptoProperties->SetInitVector(data, size);
}
#endif
#ifndef EXTRACT_ONLY
STDMETHODIMP CFilterCoder::SetCoderProperties(const PROPID *propIDs,
const PROPVARIANT *properties, UInt32 numProperties)
{
return _SetCoderProperties->SetCoderProperties(propIDs, properties, numProperties);
}
STDMETHODIMP CFilterCoder::WriteCoderProperties(ISequentialOutStream *outStream)
{
return _writeCoderProperties->WriteCoderProperties(outStream);
}
/*
STDMETHODIMP CFilterCoder::ResetSalt()
{
return _CryptoResetSalt->ResetSalt();
}
*/
STDMETHODIMP CFilterCoder::ResetInitVector()
{
return _CryptoResetInitVector->ResetInitVector();
}
#endif
STDMETHODIMP CFilterCoder::SetDecoderProperties2(const Byte *data, UInt32 size)
{
return _setDecoderProperties->SetDecoderProperties2(data, size);
}
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