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// InMemStream.cpp
#include "StdAfx.h"
#include <stdio.h>
#include "Windows/Thread.h"
#include "InMemStream.h"
#include "../../Common/Defs.h"
void CStreamInfo::Free(IInMemStreamMtCallback *callback)
{
for (int i = 0; i < Blocks.Size(); i++)
{
callback->FreeBlock(Blocks[i]);
Blocks[i] = 0;
}
}
bool CInMemStreamMt::Create(int numSubStreams, UInt64 subStreamSize)
{
Free();
_subStreamSize = subStreamSize;
size_t blockSize = Callback->GetBlockSize();
for (int i = 0; i < numSubStreams; i++)
{
_streams.Add(CStreamInfo());
CStreamInfo &blocks = _streams.Back();
blocks.Create();
for (UInt64 j = 0; (UInt64)j * blockSize < _subStreamSize; j++)
blocks.Blocks.Add(0);
}
if (!_streamIndexAllocator.AllocateList(numSubStreams))
return false;
return true;
}
void CInMemStreamMt::Free()
{
while(_streams.Size() > 0)
{
_streams.Back().Free(Callback);
_streams.DeleteBack();
}
}
HRESULT CInMemStreamMt::Read()
{
for (;;)
{
// printf("\n_streamIndexAllocator.AllocateItem\n");
int index = _streamIndexAllocator.AllocateItem();
/*
if (_stopReading)
return E_ABORT;
*/
// printf("\nread Index = %d\n", index);
CStreamInfo &blocks = _streams[index];
blocks.Init();
Callback->AddStreamIndexToQueue(index);
for (;;)
{
const Byte *p = (const Byte *)blocks.Blocks[blocks.LastBlockIndex];
if (p == 0)
{
void **pp = &blocks.Blocks[blocks.LastBlockIndex];
HRESULT res = Callback->AllocateBlock(pp);
p = (const Byte *)*pp;
RINOK(res);
if (p == 0)
return E_FAIL;
}
size_t blockSize = Callback->GetBlockSize();
UInt32 curSize = (UInt32)(blockSize - blocks.LastBlockPos);
UInt32 realProcessedSize;
UInt64 pos64 = (UInt64)blocks.LastBlockIndex * blockSize + blocks.LastBlockPos;
if (curSize > _subStreamSize - pos64)
curSize = (UInt32)(_subStreamSize - pos64);
RINOK(_stream->Read((void *)(p + blocks.LastBlockPos), curSize, &realProcessedSize));
blocks.Cs->Enter();
if (realProcessedSize == 0)
{
blocks.StreamWasFinished = true;
blocks.CanReadEvent->Set();
blocks.Cs->Leave();
Callback->AddStreamIndexToQueue(-1);
return S_OK;
}
blocks.LastBlockPos += realProcessedSize;
if (blocks.LastBlockPos == blockSize)
{
blocks.LastBlockPos = 0;
blocks.LastBlockIndex++;
}
pos64 += realProcessedSize;
if (pos64 >= _subStreamSize)
blocks.StreamWasFinished = true;
blocks.CanReadEvent->Set();
blocks.Cs->Leave();
if (pos64 >= _subStreamSize)
break;
}
}
}
static THREAD_FUNC_DECL CoderThread(void *threadCoderInfo)
{
((CInMemStreamMt *)threadCoderInfo)->ReadResult = ((CInMemStreamMt *)threadCoderInfo)->Read();
return 0;
}
HRes CInMemStreamMt::StartReadThread()
{
// _stopReading = false;
NWindows::CThread Thread;
return Thread.Create(CoderThread, this);
}
void CInMemStreamMt::FreeSubStream(int subStreamIndex)
{
// printf("\nFreeSubStream\n");
_streams[subStreamIndex].Free(Callback);
_streamIndexAllocator.FreeItem(subStreamIndex);
// printf("\nFreeSubStream end\n");
}
HRESULT CInMemStreamMt::ReadSubStream(int subStreamIndex, void *data, UInt32 size, UInt32 *processedSize, bool keepData)
{
if (processedSize != NULL)
*processedSize = 0;
CStreamInfo &blocks = _streams[subStreamIndex];
while (size > 0)
{
if (blocks.CurBlockPos == Callback->GetBlockSize())
{
blocks.CurBlockPos = 0;
blocks.CurBlockIndex++;
}
UInt32 curSize;
UInt32 curPos = blocks.CurBlockPos;
blocks.Cs->Enter();
if (blocks.CurBlockIndex == blocks.LastBlockIndex)
{
curSize = blocks.LastBlockPos - curPos;
if (curSize == 0)
{
if (blocks.StreamWasFinished)
{
blocks.Cs->Leave();
void *p = blocks.Blocks[blocks.CurBlockIndex];
if (p != 0 && !keepData)
{
Callback->FreeBlock(p);
blocks.Blocks[blocks.CurBlockIndex] = 0;
}
return S_OK;
}
blocks.CanReadEvent->Reset();
blocks.Cs->Leave();
// printf("\nBlock Lock\n");
blocks.CanReadEvent->Lock();
// printf("\nAfter Lock\n");
if (blocks.ExitResult != S_OK)
return blocks.ExitResult;
continue;
}
}
else
curSize = Callback->GetBlockSize() - curPos;
blocks.Cs->Leave();
if (curSize > size)
curSize = size;
void *p = blocks.Blocks[blocks.CurBlockIndex];
memmove(data, (const Byte *)p + curPos, curSize);
data = (void *)((Byte *)data + curSize);
size -= curSize;
if (processedSize != NULL)
*processedSize += curSize;
curPos += curSize;
bool needFree = false;
blocks.CurBlockPos = curPos;
if (curPos == Callback->GetBlockSize())
needFree = true;
blocks.Cs->Enter();
if (blocks.CurBlockIndex == blocks.LastBlockIndex &&
blocks.CurBlockPos == blocks.LastBlockPos &&
blocks.StreamWasFinished)
needFree = true;
blocks.Cs->Leave();
if (needFree && !keepData)
{
Callback->FreeBlock(p);
blocks.Blocks[blocks.CurBlockIndex] = 0;
}
return S_OK;
}
return S_OK;
}
STDMETHODIMP CInMemStream::Read(void *data, UInt32 size, UInt32 *processedSize)
{
UInt32 realProcessedSize;
HRESULT result = mtStream->ReadSubStream(Index, data, size, &realProcessedSize, _keepData);
if (processedSize != NULL)
*processedSize = realProcessedSize;
if (realProcessedSize != 0)
{
// printf("\ns = %d\n", Index);
}
_size += realProcessedSize;
return result;
}
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