author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Fri, 11 Jun 2010 14:26:25 +0300 | |
changeset 11 | 06b8e2af4411 |
parent 4 | 90517678cc4f |
permissions | -rw-r--r-- |
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/**************************************************************************** |
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** |
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). |
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** All rights reserved. |
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** Contact: Nokia Corporation (qt-info@nokia.com) |
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** |
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** This file is part of the Qt Mobility Components. |
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** |
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** $QT_BEGIN_LICENSE:LGPL$ |
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** No Commercial Usage |
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** This file contains pre-release code and may not be distributed. |
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** You may use this file in accordance with the terms and conditions |
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** contained in the Technology Preview License Agreement accompanying |
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** this package. |
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** |
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** GNU Lesser General Public License Usage |
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** Alternatively, this file may be used under the terms of the GNU Lesser |
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** General Public License version 2.1 as published by the Free Software |
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** Foundation and appearing in the file LICENSE.LGPL included in the |
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** packaging of this file. Please review the following information to |
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** ensure the GNU Lesser General Public License version 2.1 requirements |
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
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** |
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** In addition, as a special exception, Nokia gives you certain additional |
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** rights. These rights are described in the Nokia Qt LGPL Exception |
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
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** |
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** If you have questions regarding the use of this file, please contact |
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** Nokia at qt-info@nokia.com. |
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** |
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** |
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** |
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** |
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** |
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** |
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** |
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** |
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** $QT_END_LICENSE$ |
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** |
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****************************************************************************/ |
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|
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#include <directshoweventloop.h> |
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|
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#include <QtCore/qcoreapplication.h> |
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#include <QtCore/qcoreevent.h> |
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|
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class DirectShowPostedEvent |
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{ |
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public: |
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DirectShowPostedEvent(QObject *receiver, QEvent *event) |
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: receiver(receiver) |
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, event(event) |
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, next(0) |
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{ |
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} |
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|
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~DirectShowPostedEvent() |
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{ |
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delete event; |
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} |
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|
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QObject *receiver; |
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QEvent *event; |
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DirectShowPostedEvent *next; |
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}; |
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|
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DirectShowEventLoop::DirectShowEventLoop(QObject *parent) |
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: QObject(parent) |
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, m_postsHead(0) |
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, m_postsTail(0) |
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, m_eventHandle(::CreateEvent(0, 0, 0, 0)) |
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, m_waitHandle(::CreateEvent(0, 0, 0, 0)) |
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{ |
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} |
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DirectShowEventLoop::~DirectShowEventLoop() |
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{ |
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::CloseHandle(m_eventHandle); |
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::CloseHandle(m_waitHandle); |
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for (DirectShowPostedEvent *post = m_postsHead; post; post = m_postsHead) { |
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m_postsHead = m_postsHead->next; |
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delete post; |
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} |
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} |
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void DirectShowEventLoop::wait(QMutex *mutex) |
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{ |
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::ResetEvent(m_waitHandle); |
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mutex->unlock(); |
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HANDLE handles[] = { m_eventHandle, m_waitHandle }; |
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while (::WaitForMultipleObjects(2, handles, false, INFINITE) == WAIT_OBJECT_0) |
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processEvents(); |
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mutex->lock(); |
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} |
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void DirectShowEventLoop::wake() |
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102 |
{ |
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::SetEvent(m_waitHandle); |
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} |
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105 |
|
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106 |
void DirectShowEventLoop::postEvent(QObject *receiver, QEvent *event) |
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107 |
{ |
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QMutexLocker locker(&m_mutex); |
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109 |
|
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DirectShowPostedEvent *post = new DirectShowPostedEvent(receiver, event); |
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111 |
|
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if (m_postsTail) |
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m_postsTail->next = post; |
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114 |
else |
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m_postsHead = post; |
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116 |
|
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m_postsTail = post; |
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118 |
|
4
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119 |
QCoreApplication::postEvent(this, new QEvent(QEvent::User)); |
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::SetEvent(m_eventHandle); |
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121 |
} |
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122 |
|
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void DirectShowEventLoop::customEvent(QEvent *event) |
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124 |
{ |
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if (event->type() == QEvent::User) { |
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processEvents(); |
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} else { |
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QObject::customEvent(event); |
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129 |
} |
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130 |
} |
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131 |
|
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void DirectShowEventLoop::processEvents() |
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133 |
{ |
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134 |
QMutexLocker locker(&m_mutex); |
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135 |
|
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::ResetEvent(m_eventHandle); |
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137 |
|
1
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138 |
while(m_postsHead) { |
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DirectShowPostedEvent *post = m_postsHead; |
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m_postsHead = m_postsHead->next; |
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141 |
|
4
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142 |
if (!m_postsHead) |
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m_postsTail = 0; |
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144 |
|
1
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locker.unlock(); |
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QCoreApplication::sendEvent(post->receiver, post->event); |
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147 |
delete post; |
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locker.relock(); |
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149 |
} |
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150 |
} |