CameraThread.cpp

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#include <blort/Tracker/CameraThread.h>
#include <stdexcept>

using namespace Tracking;

CameraThread::CameraThread(int camID, int width, int height)
{
        m_mutex.Lock();
                m_new_image = false;
                m_camID = camID;
                m_width = width;
                m_height = height;
                
                m_capture = cvCreateCameraCapture(m_camID);
                
                if(!m_capture)
                        throw std::runtime_error("[CameraThread::CameraThread] Can not create camera capture.\n");
                
                cvSetCaptureProperty(m_capture, CV_CAP_PROP_FRAME_WIDTH, m_width );
                cvSetCaptureProperty(m_capture, CV_CAP_PROP_FRAME_HEIGHT, m_height );
                m_image = cvQueryFrame(m_capture);
                
                if(m_image->width != width || m_image->height != height){
                        char errmsg[128];
                        sprintf(errmsg, "[CameraThread::CameraThread] Created capture with wrong resolution %dx%d instead of %dx%d (OpenCV)", m_image->width, m_image->height, width, height);
                        throw std::runtime_error(errmsg);                       
                }
                
        m_mutex.Unlock();
}

CameraThread::~CameraThread()
{
        this->Stop();
}

BOOL CameraThread::OnTask()
{
        m_image = cvQueryFrame(m_capture);
        m_new_image = true;
        return TRUE;
}

void CameraThread::GetImage(IplImage* image)
{
        if(m_new_image){
//              printf("%d %d, %d %d\n", m_image->width, m_image->height, image->width, image->height);
                cvCopyImage(m_image, image);
                m_new_image = false;
        }
}