src/camerathread.h

   1 /*************************************************************************
   2 Copyright 2009, Matthew Thompson, Lee Hicks
   3
   4 This file is part of EconoBoard.
   5
   6     EconoBoard is free software: you can redistribute it and/or modify
   7     it under the terms of the GNU General Public License as published by
   8     the Free Software Foundation, either version 3 of the License, or
   9     (at your option) any later version.
  10
  11     EconoBoard is distributed in the hope that it will be useful,
  12     but WITHOUT ANY WARRANTY; without even the implied warranty of
  13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14     GNU General Public License for more details.
  15
  16     You should have received a copy of the GNU General Public License
  17     along with EconoBoard.  If not, see <http://www.gnu.org/licenses/>.
  18 *************************************************************************/
  19
  20 #ifndef EBCAMERATHREAD_H
  21 #define EBCAMERATHREAD_H
  22
  23 #include <QThread>
  24 #include <QMutex>
  25 #include <QTimer>
  26 #include <QImage>
  27 #include <cv.h>
  28 #include <highgui.h>
  29
  30 #define SMALLEST_REGION 10
  31
  32 namespace eb
  33 {
  34
  35 class CameraThread : public QThread
  36 {
  37     Q_OBJECT
  38
  39 public:
  40     CameraThread(QObject *parent = 0);
  41     ~CameraThread();
  42
  43     inline bool canCapture()
  44     {
  45         return capture;
  46     }
  47     inline int camera()
  48     {
  49         return camid;
  50     }
  51     inline int threshold()
  52     {
  53         return thresh;
  54     }
  55
  56 public slots:
  57     void attachView();
  58     void detachView();
  59
  60     void grab();
  61
  62     void setThreshold(int t);
  63     void setCamera(int idx);
  64     void setDisplayUpdate(int ms); // set to 0 to stop converting
  65     void setCaptureUpdate(int ms);
  66         void setApplyThreshold(bool apply);
  67
  68 private slots:
  69     void updateFrame();
  70
  71 signals:
  72     void imageGrabbed(const QImage &img);
  73     void FPSCalculated(int fps);
  74
  75 protected:
  76     void run();
  77
  78 private:
  79     class TargetPoint
  80     {
  81     public:
  82         TargetPoint() : valid(false) {}
  83         TargetPoint(int X, int Y) : valid(true), x(X), y(Y) {}
  84
  85         bool valid;
  86         int x, y;
  87     };
  88
  89     TargetPoint tpoint;
  90
  91     IplImage *captureFrame();
  92
  93     QImage defaultImage();
  94     QImage convertImage();
  95
  96     void allocateBuffers();
  97     void destroyBuffers();
  98
  99     TargetPoint applyFilters(IplImage *img);
 100
 101     int camid, numchannels, thresh;
 102     int updateDelay, captureDelay, views;
 103         bool applyThreshold;
 104
 105     QSize frameSize;
 106
 107     QTimer updateTimer, captureTimer;
 108     QMutex filterMut, captureMut;
 109     QImage tmp;
 110
 111     IplImage *bufferImg, *filterImg, *tmpImg;
 112     CvCapture *capture;
 113
 114 };
 115
 116 }
 117
 118 #endif