source/gles2glide64/src/Glide64/FrameSkipper.h

   1 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
   2  *   Copyright (C) 2011 yongzh (freeman.yong@gmail.com)                    *
   3  *                                                                         *
   4  *   This program is free software; you can redistribute it and/or modify  *
   5  *   it under the terms of the GNU General Public License as published by  *
   6  *   the Free Software Foundation; either version 2 of the License, or     *
   7  *   (at your option) any later version.                                   *
   8  *                                                                         *
   9  *   This program is distributed in the hope that it will be useful,       *
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  12  *   GNU General Public License for more details.                          *
  13  *                                                                         *
  14  *   You should have received a copy of the GNU General Public License     *
  15  *   along with this program; if not, write to the                         *
  16  *   Free Software Foundation, Inc.,                                       *
  17  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.          *
  18  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
  19
  20 #ifndef FRAME_SKIPPER_H
  21 #define FRAME_SKIPPER_H
  22
  23 class FrameSkipper {
  24 public:
  25         enum { AUTO, MANUAL };
  26
  27         FrameSkipper();
  28
  29         void setSkips(int type, int max) {
  30                 skipType = type;
  31                 maxSkips = max;
  32         }
  33
  34         void setTargetFPS(int fps) {
  35                 targetFPS = fps;
  36         }
  37         bool willSkipNext() {
  38                 return (skipCounter > 0);
  39         }
  40
  41 #if 0
  42         bool hasSkipped();
  43 #else
  44         bool hasSkipped() {
  45                 return (oldSkip > 0);
  46         }
  47         void newFrame();
  48 #endif
  49         void start();
  50         void update();
  51
  52 private:
  53         int skipType;
  54         int     oldSkip;
  55         int maxSkips;
  56         int targetFPS;
  57         int skipCounter;
  58         int     countVI;
  59         unsigned int initialTicks;
  60         unsigned int virtualCount;
  61 };
  62
  63 #endif
  64