1/*
2 * Copyright (C) 2007, 2008, 2009, 2010 Apple, Inc.  All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#ifndef QTMovieTask_h
27#define QTMovieTask_h
28
29#include <wtf/HashSet.h>
30
31#ifdef QTMOVIEWIN_EXPORTS
32#define QTMOVIEWIN_API __declspec(dllexport)
33#else
34#define QTMOVIEWIN_API __declspec(dllimport)
35#endif
36
37class QTMovieTaskClient {
38public:
39    virtual void task() = 0;
40};
41
42typedef void (*SetTaskTimerDelayFunc)(double);
43typedef void (*StopTaskTimerFunc)();
44
45class QTMOVIEWIN_API QTMovieTask {
46public:
47    static QTMovieTask* sharedTask();
48
49    void addTaskClient(QTMovieTaskClient* client);
50    void removeTaskClient(QTMovieTaskClient*);
51    void fireTaskClients();
52
53    void updateTaskTimer(double maxInterval = 1.0, double minInterval = 1.0 / 30);
54    void setTaskTimerFuncs(SetTaskTimerDelayFunc setTaskTimerDelay, StopTaskTimerFunc stopTaskTimer);
55
56protected:
57    QTMovieTask();
58    ~QTMovieTask();
59
60    SetTaskTimerDelayFunc m_setTaskTimerDelay;
61    StopTaskTimerFunc m_stopTaskTimer;
62    HashSet<QTMovieTaskClient*> m_taskList;
63
64private:
65    QTMovieTask(const QTMovieTask&);
66    QTMovieTask& operator=(const QTMovieTask&);
67};
68
69#endif
70