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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 | |