4.44 beta

2025-12-12 07:09:54 -06:00 · 2007-01-20 00:00:00 +00:00
parent 804edc5756
commit d9666cf046
1331 changed files with 10535 additions and 13791 deletions
--- a/CPP/7zip/Compress/PPMD/PPMDEncoder.cpp
+++ b/CPP/7zip/Compress/PPMD/PPMDEncoder.cpp
@@ -0,0 +1,155 @@
+// Compress/Associative/Encoder.h
+
+#include "StdAfx.h"
+
+#include "Windows/Defs.h"
+
+// #include <fstream.h>
+// #include <iomanip.h>
+
+#include "Common/Defs.h"
+
+#include "../../Common/StreamUtils.h"
+
+#include "PPMDEncoder.h"
+
+namespace NCompress {
+namespace NPPMD {
+
+const UInt32 kMinMemSize = (1 << 11); 
+const UInt32 kMinOrder = 2;
+
+/*
+UInt32 g_NumInner = 0;
+UInt32 g_InnerCycles = 0;
+
+UInt32 g_Encode2 = 0;
+UInt32 g_Encode2Cycles = 0;
+UInt32 g_Encode2Cycles2 = 0;
+
+class CCounter
+{
+public:
+  CCounter() {}
+  ~CCounter() 
+  {
+    ofstream ofs("Res.dat");
+    ofs << "innerEncode1    = " << setw(10) << g_NumInner << endl;
+    ofs << "g_InnerCycles   = " << setw(10) << g_InnerCycles << endl;
+    ofs << "g_Encode2       = " << setw(10) << g_Encode2 << endl;
+    ofs << "g_Encode2Cycles = " << setw(10) << g_Encode2Cycles << endl;
+    ofs << "g_Encode2Cycles2= " << setw(10) << g_Encode2Cycles2 << endl;
+    
+  }
+};
+CCounter g_Counter;
+*/
+
+STDMETHODIMP CEncoder::SetCoderProperties(const PROPID *propIDs, 
+    const PROPVARIANT *properties, UInt32 numProperties)
+{
+  for (UInt32 i = 0; i < numProperties; i++)
+  {
+    const PROPVARIANT &prop = properties[i];
+    switch(propIDs[i])
+    {
+      case NCoderPropID::kUsedMemorySize:
+        if (prop.vt != VT_UI4)
+          return E_INVALIDARG;
+        if (prop.ulVal < kMinMemSize || prop.ulVal > kMaxMemBlockSize)
+          return E_INVALIDARG;
+        _usedMemorySize = (UInt32)prop.ulVal;
+        break;
+      case NCoderPropID::kOrder:
+        if (prop.vt != VT_UI4)
+          return E_INVALIDARG;
+        if (prop.ulVal < kMinOrder || prop.ulVal > kMaxOrderCompress)
+          return E_INVALIDARG;
+        _order = (Byte)prop.ulVal;
+        break;
+      default:
+        return E_INVALIDARG;
+    }
+  }
+  return S_OK;
+}
+
+STDMETHODIMP CEncoder::WriteCoderProperties(ISequentialOutStream *outStream)
+{ 
+  const UInt32 kPropSize = 5;
+  Byte properties[kPropSize];
+  properties[0] = _order;
+  for (int i = 0; i < 4; i++)
+    properties[1 + i] = Byte(_usedMemorySize >> (8 * i));
+  return WriteStream(outStream, properties, kPropSize, NULL);
+}
+
+const UInt32 kUsedMemorySizeDefault = (1 << 24);
+const int kOrderDefault = 6;
+
+CEncoder::CEncoder():
+  _usedMemorySize(kUsedMemorySizeDefault),
+  _order(kOrderDefault)
+{
+}
+
+
+HRESULT CEncoder::CodeReal(ISequentialInStream *inStream,
+      ISequentialOutStream *outStream, 
+      const UInt64 * /* inSize */, const UInt64 * /* outSize */,
+      ICompressProgressInfo *progress)
+{
+  if (!_inStream.Create(1 << 20))
+    return E_OUTOFMEMORY;
+  if (!_rangeEncoder.Create(1 << 20))
+    return E_OUTOFMEMORY;
+  if (!_info.SubAllocator.StartSubAllocator(_usedMemorySize)) 
+    return E_OUTOFMEMORY;
+
+  _inStream.SetStream(inStream);
+  _inStream.Init();
+
+  _rangeEncoder.SetStream(outStream);
+  _rangeEncoder.Init();
+
+  CEncoderFlusher flusher(this);
+
+  _info.MaxOrder = 0;
+  _info.StartModelRare(_order);
+
+  for (;;)
+  {
+    UInt32 size = (1 << 18);
+    do
+    {
+      Byte symbol;
+      if (!_inStream.ReadByte(symbol))
+      {
+        // here we can write End Mark for stream version. 
+        // In current version this feature is not used.
+        // _info.EncodeSymbol(-1, &_rangeEncoder);   
+        return S_OK;
+      }
+      _info.EncodeSymbol(symbol, &_rangeEncoder);   
+    }
+    while (--size != 0);
+    if (progress != NULL)
+    {
+      UInt64 inSize = _inStream.GetProcessedSize();
+      UInt64 outSize = _rangeEncoder.GetProcessedSize();
+      RINOK(progress->SetRatioInfo(&inSize, &outSize));
+    }
+  }
+}
+
+STDMETHODIMP CEncoder::Code(ISequentialInStream *inStream,
+    ISequentialOutStream *outStream, const UInt64 *inSize, const UInt64 *outSize,
+    ICompressProgressInfo *progress)
+{
+  try { return CodeReal(inStream, outStream, inSize, outSize, progress); }
+  catch(const COutBufferException &e) { return e.ErrorCode; }
+  catch(const CInBufferException &e) { return e.ErrorCode; }
+  catch(...) { return E_FAIL; }
+}
+
+}}