| 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 | |