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      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 #include "config.h"
     26 
     27 #include "QTMovieTask.h"
     28 
     29 // Put Movies.h first so build failures here point clearly to QuickTime
     30 #include <Movies.h>
     31 
     32 #include <wtf/HashSet.h>
     33 #include <wtf/StdLibExtras.h>
     34 #include <wtf/Vector.h>
     35 
     36 QTMovieTask::QTMovieTask()
     37     : m_setTaskTimerDelay(0)
     38     , m_stopTaskTimer(0)
     39 {
     40 }
     41 
     42 QTMovieTask::~QTMovieTask()
     43 {
     44 }
     45 
     46 QTMovieTask* QTMovieTask::sharedTask()
     47 {
     48     static QTMovieTask* s_sharedTask = new QTMovieTask;
     49     return s_sharedTask;
     50 }
     51 
     52 void QTMovieTask::updateTaskTimer(double maxInterval, double minInterval)
     53 {
     54     ASSERT(m_setTaskTimerDelay);
     55     if (!m_setTaskTimerDelay)
     56         return;
     57 
     58     ASSERT(m_stopTaskTimer);
     59     if (!m_taskList.size() && m_stopTaskTimer) {
     60         m_stopTaskTimer();
     61         return;
     62     }
     63 
     64     long intervalInMS;
     65     OSStatus status = QTGetTimeUntilNextTask(&intervalInMS, 1000);
     66     double interval = intervalInMS / 1000.0;
     67     if (interval < minInterval)
     68         interval = minInterval;
     69     if (interval > maxInterval)
     70         interval = maxInterval;
     71     m_setTaskTimerDelay(interval);
     72 }
     73 
     74 void QTMovieTask::fireTaskClients()
     75 {
     76     Vector<QTMovieTaskClient*> clients;
     77     copyToVector(m_taskList, clients);
     78     for (Vector<QTMovieTaskClient*>::iterator i = clients.begin(); i != clients.end(); ++i)
     79         (*i)->task();
     80 }
     81 
     82 void QTMovieTask::addTaskClient(QTMovieTaskClient* client)
     83 {
     84     ASSERT(client);
     85     if (!client)
     86         return;
     87 
     88     m_taskList.add(client);
     89 }
     90 
     91 void QTMovieTask::removeTaskClient(QTMovieTaskClient* client)
     92 {
     93     ASSERT(client);
     94     if (!client)
     95         return;
     96 
     97     m_taskList.remove(client);
     98 }
     99 
    100 void QTMovieTask::setTaskTimerFuncs(SetTaskTimerDelayFunc setTaskTimerDelay, StopTaskTimerFunc stopTaskTimer)
    101 {
    102     m_setTaskTimerDelay = setTaskTimerDelay;
    103     m_stopTaskTimer = stopTaskTimer;
    104 }
    105 
    106