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100 lines
3.0 KiB
C++
100 lines
3.0 KiB
C++
// MethodProps.cpp
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#include "StdAfx.h"
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#include "../../Common/MyCom.h"
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#include "../ICoder.h"
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#include "MethodProps.h"
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static const UInt64 k_LZMA = 0x030101;
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static const UInt64 k_LZMA2 = 0x21;
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HRESULT SetMethodProperties(const CMethod &method, const UInt64 *inSizeForReduce, IUnknown *coder)
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{
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bool tryReduce = false;
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UInt32 reducedDictionarySize = 1 << 10;
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if (inSizeForReduce != 0 && (method.Id == k_LZMA || method.Id == k_LZMA2))
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{
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for (;;)
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{
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const UInt32 step = (reducedDictionarySize >> 1);
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if (reducedDictionarySize >= *inSizeForReduce)
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{
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tryReduce = true;
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break;
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}
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reducedDictionarySize += step;
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if (reducedDictionarySize >= *inSizeForReduce)
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{
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tryReduce = true;
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break;
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}
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if (reducedDictionarySize >= ((UInt32)3 << 30))
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break;
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reducedDictionarySize += step;
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}
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}
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{
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int numProps = method.Props.Size();
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CMyComPtr<ICompressSetCoderProperties> setCoderProperties;
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coder->QueryInterface(IID_ICompressSetCoderProperties, (void **)&setCoderProperties);
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if (setCoderProperties == NULL)
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{
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if (numProps != 0)
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return E_INVALIDARG;
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}
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else
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{
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CRecordVector<PROPID> propIDs;
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NWindows::NCOM::CPropVariant *values = new NWindows::NCOM::CPropVariant[numProps];
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HRESULT res = S_OK;
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try
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{
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for (int i = 0; i < numProps; i++)
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{
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const CProp &prop = method.Props[i];
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propIDs.Add(prop.Id);
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NWindows::NCOM::CPropVariant &value = values[i];
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value = prop.Value;
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// if (tryReduce && prop.Id == NCoderPropID::kDictionarySize && value.vt == VT_UI4 && reducedDictionarySize < value.ulVal)
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if (tryReduce)
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if (prop.Id == NCoderPropID::kDictionarySize)
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if (value.vt == VT_UI4)
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if (reducedDictionarySize < value.ulVal)
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value.ulVal = reducedDictionarySize;
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}
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CMyComPtr<ICompressSetCoderProperties> setCoderProperties;
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coder->QueryInterface(IID_ICompressSetCoderProperties, (void **)&setCoderProperties);
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res = setCoderProperties->SetCoderProperties(&propIDs.Front(), values, numProps);
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}
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catch(...)
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{
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delete []values;
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throw;
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}
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delete []values;
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RINOK(res);
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}
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}
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/*
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CMyComPtr<ICompressWriteCoderProperties> writeCoderProperties;
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coder->QueryInterface(IID_ICompressWriteCoderProperties, (void **)&writeCoderProperties);
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if (writeCoderProperties != NULL)
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{
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CSequentialOutStreamImp *outStreamSpec = new CSequentialOutStreamImp;
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CMyComPtr<ISequentialOutStream> outStream(outStreamSpec);
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outStreamSpec->Init();
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RINOK(writeCoderProperties->WriteCoderProperties(outStream));
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size_t size = outStreamSpec->GetSize();
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filterProps.SetCapacity(size);
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memmove(filterProps, outStreamSpec->GetBuffer(), size);
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}
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*/
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return S_OK;
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}
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