videoTransport.h

   1 /* ***** BEGIN LICENSE BLOCK *****
   2  *
   3  * The MIT License
   4  *
   5  * Copyright (c) 2008 BBC Research
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a copy
   8  * of this software and associated documentation files (the "Software"), to deal
   9  * in the Software without restriction, including without limitation the rights
  10  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  11  * copies of the Software, and to permit persons to whom the Software is
  12  * furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included in
  15  * all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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  20  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  23  * THE SOFTWARE.
  24  *
  25  * ***** END LICENSE BLOCK ***** */
  26
  27 #ifndef VIDEOTRANSPORT_H
  28 #define VIDEOTRANSPORT_H
  29
  30 #include <QtGui>
  31
  32 #include "frameQueue.h"
  33 #include "videoData.h"
  34
  35 class VideoTransport : public QObject
  36 {
  37         Q_OBJECT
  38
  39 public:
  40
  41         enum TransportControls {
  42                 Rev100 = 0,
  43                 Rev50,
  44                 Rev20,
  45                 Rev10,
  46                 Rev5,
  47                 Rev2,
  48                 Rev1,
  49                 PlayPause,
  50                 Pause,
  51                 Stop,
  52                 Fwd1,
  53                 Fwd2,
  54                 Fwd5,
  55                 Fwd10,
  56                 Fwd20,
  57                 Fwd50,
  58                 Fwd100,
  59                 JogFwd,
  60                 JogRev,
  61                 Unknown}; //transport control status
  62
  63         VideoTransport(FrameQueue *fq);
  64         void setLooping(bool l);
  65
  66         VideoData* getNextFrame(void); //the frame that is currently being displayed, this pointer is only manipulated from the read thread
  67         int getDirection(); //return the current transport direction -1 reverse, 0 stopped/paused, 1 forward.
  68         int getSpeed();
  69
  70 protected:
  71
  72         signals:
  73         void endOfFile(void);
  74
  75 public slots:
  76         //slots to connect keys / buttons to play and scrub controls
  77         void transportFwd100();
  78         void transportFwd50();
  79         void transportFwd20();
  80         void transportFwd10();
  81         void transportFwd5();
  82         void transportFwd2();
  83         void transportFwd1();
  84         void transportStop();
  85         void transportRev1();
  86         void transportRev2();
  87         void transportRev5();
  88         void transportRev10();
  89         void transportRev20();
  90         void transportRev50();
  91         void transportRev100();
  92
  93         //frame jog controls
  94         void transportJogFwd();
  95         void transportJogRev();
  96
  97         //play / pause
  98         void transportPlayPause();
  99         void transportPause();
 100
 101 private:
 102         void transportController(TransportControls c);
 103         FrameQueue *frameQueue;
 104         bool looping;
 105
 106         TransportControls transportStatus; //what we are doing now - shared with readThread
 107         TransportControls lastTransportStatus; //what we were doing last
 108 };
 109
 110 #endif