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FileReader.cpp
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FileReader.cpp
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#include "stdafx.h"
#include "FileReader.h"
// 定时抓取IPC图像的线程
void CFileReader::CaptureThread(LPVOID param)
{
CFileReader *pThis = (CFileReader*)param;
OutputDebugStringA("======> CaptureThread Start.\n");
pThis->m_bThreadStart = true;
timeBeginPeriod(1);
#ifdef _DEBUG
clock_t last = clock(), cur;
#endif
while (pThis->IsStream())
{
#ifdef _DEBUG
cur = last;
#else
clock_t cur(clock());
#endif
cv::Mat m = pThis->IsIPC() ? pThis->m_IPC.GetCapture() :
pThis->ReadCamera();
if (m.empty() || !pThis->PushStream(m)) // 处理不过来将进行丢帧
{
Sleep(10);
continue;
}
int nTime = 40 - (clock() - cur);
Sleep(nTime > 0 ? nTime : 0);
#ifdef _DEBUG
last = clock();
if (last - cur > 45)
OUTPUT("======> CaptureThread time = %d\n", last - cur);
#endif
}
timeEndPeriod(1);
pThis->m_bThreadStart = false;
OutputDebugStringA("======> CaptureThread Stop.\n");
}
// 启动线程
void CFileReader::StartThread()
{
if(IsStream() && !m_bThreadStart && m_nStreamBuf)
{
_beginthread(CaptureThread, 0, this);
int k = 0;
do {
Sleep(40);
}while (NoStream() && ++k < 25);
}
}
void CFileReader::SetBufferSize(int nSize)
{
Lock();
m_nStreamBuf = nSize < BUF_MIN_LEN ? 0 : nSize;
m_nImageBuf = max(nSize, BUF_MIN_LEN);
Unlock();
}
CFileReader::CFileReader(void)
{
m_nType = TYPE_UNKNOWN;
m_nImageBuf = 10;
m_nStreamBuf = 10;
memset(m_nDims, 0, 3 * sizeof(int));
m_bThreadStart = false;
InitializeCriticalSection(&m_cs);
m_IPC.Create();
}
CFileReader::~CFileReader(void)
{
m_nType = TYPE_UNKNOWN;
while (m_bThreadStart)
Sleep(10);
DeleteCriticalSection(&m_cs);
}
bool CFileReader::Open(const char *path)
{
try
{
Clear();
m_nType = TYPE_IMAGE;
cv::Mat m = cv::imread(path);
if (m.empty())
{
m_nType = TYPE_UNKNOWN;
try {
if (m_Cap.open(path) ? m_Cap.read(m) : false)
m_nType = TYPE_VIDEO;
}catch(...){
}
}
if (TYPE_UNKNOWN != m_nType)
{
m_nDims[0] = m.rows;
m_nDims[1] = m.cols;
m_nDims[2] = m.step[1];
return PushImage(m);
}
}catch(cv::Exception &e)
{
OUTPUT("======> cv::Exception: %s\n", e.what());
}catch(...) { }
return false;
}
bool CFileReader::OpenIPCamera(const IPCamInfo &cam, HWND hWnd)
{
try
{
Clear();
m_nType = TYPE_UNKNOWN;
cv::Mat m;
if (m_IPC.LoginCamera(cam, hWnd) >= 0)
{
int i = 0;
do
{
Sleep(40);
m = m_IPC.GetCapture();
} while (m.empty() && ++i < 25);
m_nType = TYPE_IPC;
}
else
{
try {
if (m_Cap.open(NULL) ? m_Cap.read(m) : false)
m_nType = TYPE_CAMERA;
}catch(...){
return false;
}
}
if (TYPE_UNKNOWN != m_nType)
{
m_nDims[0] = m.rows;
m_nDims[1] = m.cols;
m_nDims[2] = m.step[1];
return PushImage(m);
}
}catch(cv::Exception &e)
{
OUTPUT("======> cv::Exception: %s\n", e.what());
}catch(...) { }
return false;
}
cv::Mat CFileReader::PlayVideo()
{
cv::Mat m;
try
{
switch (m_nType)
{
case TYPE_UNKNOWN:
break;
case TYPE_IMAGE:
break;
case TYPE_VIDEO:
if (m_Cap.read(m))
return m;
case TYPE_IPC:
return 0 == m_nStreamBuf ? m_IPC.GetCapture() : PopStream();
case TYPE_CAMERA:
return 0 == m_nStreamBuf ? ReadCamera() : PopStream();
default:
break;
}
}catch(...){
}
return m;
}
bool CFileReader::PushImage(const cv::Mat &m)
{
Lock();
bool result = m_Buffer.size() < m_nImageBuf;
if (result)
m_Buffer.push(m);
Unlock();
return result;
}
cv::Mat CFileReader::PopImage()
{
cv::Mat m;
Lock();
if (!m_Buffer.empty())
{
m = m_Buffer.front();
m_Buffer.pop();
}
Unlock();
return m;
}
bool CFileReader::PushStream(const cv::Mat &m)
{
Lock();
bool result = m_Stream.size() < m_nStreamBuf;
if (result)
m_Stream.push(m);
Unlock();
return result;
}
cv::Mat CFileReader::PopStream()
{
cv::Mat m;
Lock();
if (!m_Stream.empty())
{
m = m_Stream.front();
m_Stream.pop();
}
Unlock();
return m;
}
bool CFileReader::NoStream()
{
Lock();
bool result = m_Stream.empty();
Unlock();
return result;
}
void CFileReader::Clear()
{
m_nType = TYPE_UNKNOWN;
while (m_bThreadStart)
Sleep(10);
Lock();
while(!m_Buffer.empty())
m_Buffer.pop();
while(!m_Stream.empty())
m_Stream.pop();
Unlock();
m_Cap.release();
memset(m_nDims, 0, 3 * sizeof(int));
}
void CFileReader::Destroy()
{
Clear();
cv::destroyAllWindows();
}
bool CFileReader::IsBuffering()
{
Lock();
bool result = m_Buffer.size() < m_nImageBuf;
Unlock();
return result;
}
cv::Mat CFileReader::Front()
{
cv::Mat m;
Lock();
if (!m_Buffer.empty())
m = m_Buffer.front();
Unlock();
return m;
}