git.maemo.org Git - physicsfs/blob - lzma/CPP/7zip/Common/MethodProps.cpp

   1 // MethodProps.cpp
   2
   3 #include "StdAfx.h"
   4
   5 #include "MethodProps.h"
   6 #include "../../Common/MyCom.h"
   7
   8 static UInt64 k_LZMA = 0x030101;
   9 // static UInt64 k_LZMA2 = 0x030102;
  10
  11 HRESULT SetMethodProperties(const CMethod &method, const UInt64 *inSizeForReduce, IUnknown *coder)
  12 {
  13   bool tryReduce = false;
  14   UInt32 reducedDictionarySize = 1 << 10;
  15   if (inSizeForReduce != 0 && (method.Id == k_LZMA /* || methodFull.MethodID == k_LZMA2 */))
  16   {
  17     for (;;)
  18     {
  19       const UInt32 step = (reducedDictionarySize >> 1);
  20       if (reducedDictionarySize >= *inSizeForReduce)
  21       {
  22         tryReduce = true;
  23         break;
  24       }
  25       reducedDictionarySize += step;
  26       if (reducedDictionarySize >= *inSizeForReduce)
  27       {
  28         tryReduce = true;
  29         break;
  30       }
  31       if (reducedDictionarySize >= ((UInt32)3 << 30))
  32         break;
  33       reducedDictionarySize += step;
  34     }
  35   }
  36
  37   {
  38     int numProperties = method.Properties.Size();
  39     CMyComPtr<ICompressSetCoderProperties> setCoderProperties;
  40     coder->QueryInterface(IID_ICompressSetCoderProperties, (void **)&setCoderProperties);
  41     if (setCoderProperties == NULL)
  42     {
  43       if (numProperties != 0)
  44         return E_INVALIDARG;
  45     }
  46     else
  47     {
  48       CRecordVector<PROPID> propIDs;
  49       NWindows::NCOM::CPropVariant *values = new NWindows::NCOM::CPropVariant[numProperties];
  50       HRESULT res = S_OK;
  51       try
  52       {
  53         for (int i = 0; i < numProperties; i++)
  54         {
  55           const CProp &prop = method.Properties[i];
  56           propIDs.Add(prop.Id);
  57           NWindows::NCOM::CPropVariant &value = values[i];
  58           value = prop.Value;
  59           // if (tryReduce && prop.Id == NCoderPropID::kDictionarySize && value.vt == VT_UI4 && reducedDictionarySize < value.ulVal)
  60           if (tryReduce)
  61             if (prop.Id == NCoderPropID::kDictionarySize)
  62               if (value.vt == VT_UI4)
  63                 if (reducedDictionarySize < value.ulVal)
  64             value.ulVal = reducedDictionarySize;
  65         }
  66         CMyComPtr<ICompressSetCoderProperties> setCoderProperties;
  67         coder->QueryInterface(IID_ICompressSetCoderProperties, (void **)&setCoderProperties);
  68         res = setCoderProperties->SetCoderProperties(&propIDs.Front(), values, numProperties);
  69       }
  70       catch(...)
  71       {
  72         delete []values;
  73         throw;
  74       }
  75       delete []values;
  76       RINOK(res);
  77     }
  78   }
  79
  80   /*
  81   CMyComPtr<ICompressWriteCoderProperties> writeCoderProperties;
  82   coder->QueryInterface(IID_ICompressWriteCoderProperties, (void **)&writeCoderProperties);
  83   if (writeCoderProperties != NULL)
  84   {
  85     CSequentialOutStreamImp *outStreamSpec = new CSequentialOutStreamImp;
  86     CMyComPtr<ISequentialOutStream> outStream(outStreamSpec);
  87     outStreamSpec->Init();
  88     RINOK(writeCoderProperties->WriteCoderProperties(outStream));
  89     size_t size = outStreamSpec->GetSize();
  90     filterProps.SetCapacity(size);
  91     memmove(filterProps, outStreamSpec->GetBuffer(), size);
  92   }
  93   */
  94   return S_OK;
  95 }
  96