QVision: Qt's Image, Video and Computer Vision Library

00001 /*
00002  *      Copyright (C) 2007, 2008, 2009, 2010, 2011, 2012. PARP Research Group.
00003  *      <http://perception.inf.um.es>
00004  *      University of Murcia, Spain.
00005  *
00006  *      This file is part of the QVision library.
00007  *
00008  *      QVision is free software: you can redistribute it and/or modify
00009  *      it under the terms of the GNU Lesser General Public License as
00010  *      published by the Free Software Foundation, version 3 of the License.
00011  *
00012  *      QVision is distributed in the hope that it will be useful,
00013  *      but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00015  *      GNU Lesser General Public License for more details.
00016  *
00017  *      You should have received a copy of the GNU Lesser General Public
00018  *      License along with QVision. If not, see <http://www.gnu.org/licenses/>.
00019  */
00020 
00024 
00025 #ifndef QVVIDEOREADERBLOCK_H
00026 #define QVVIDEOREADERBLOCK_H
00027 
00028 #include <QVProcessingBlock>
00029 #include <QVImage>
00030 #include <QVVideoReader>
00031 
00115 class QVVideoReaderBlock: public QVProcessingBlock
00116 {
00117 Q_OBJECT
00118 public:
00119 
00123     QVVideoReaderBlock(QString name = QString(""));
00124 
00126     ~QVVideoReaderBlock();
00127 
00139     bool linkProperty(QVPropertyContainer *dstCont, QString dstProp);
00140 
00155     bool linkProperty(QVPropertyContainer *dstCont, QString dstProp1, QString dstProp2, QString dstProp3, bool YUV_RGB=false);
00156 
00157 protected:
00158     bool realTime, noLoop, deinterlaced;
00159 
00160     /*
00161     virtual bool open(QString urlName, int &cols, int &rows, int &fps, bool &YUV_RGB) = 0;
00162     virtual void close() = 0;
00163     virtual bool grab(QVImage<uChar,1> &imgY_R, QVImage<uChar,1> &imgU_G, QVImage<uChar,1> &imgV_B) = 0;
00164     virtual double lengthOfVideo() = 0;
00165     virtual double currentPos() = 0;*/
00166 
00167 signals:
00169     void opened();
00170 
00172     void closed();
00173 
00175     void grabbed();
00176 
00177 private:
00178     bool flush_pending_images;
00179     QString urlName;
00180     QVImage<uChar,1> imageY, imageU, imageV, imageR, imageG, imageB;
00181     QVImage<uChar,3> imageRGB;
00182 
00183     void tryOpeningCam();
00184     void iterate();
00185     void connectOrDisconnectLinkedBlocks(bool connect_disconnect);
00186     QVVideoReader video_reader;
00187 
00188 private slots:
00192     void setPos(int pos) { video_reader.seek(pos) ;};
00193 
00198     void reopen();
00199 
00203     void reset();
00204 
00205     void grabFrame();
00206 
00207     void nothing() {/* Just to block connected blocks if in real time (using Qt::BlockingQueuedConnection) */};
00208 };
00209 
00210 #endif // QVVIDEOREADERBLOCK_H
src/qvblockprogramming/qvioblocks/qvvideoreaderblock.h
