424 lines
27 KiB
HTML
424 lines
27 KiB
HTML
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<h1 class="title">videoplayer.cpp Example File</h1>
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<span class="small-subtitle">multimedia/videographicsitem/videoplayer.cpp</span>
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<!-- $$$multimedia/videographicsitem/videoplayer.cpp-description -->
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<div class="descr"> <a name="details"></a>
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<pre class="cpp"> <span class="comment">/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Contact: http://www.qt.io/licensing/
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**
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** This file is part of the examples of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** You may use this file under the terms of the BSD license as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of The Qt Company Ltd nor the names of its
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** contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
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**
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/</span>
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<span class="preprocessor">#include "videoplayer.h"</span>
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<span class="preprocessor">#include "videoitem.h"</span>
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<span class="preprocessor">#include <QtMultimedia></span>
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<span class="preprocessor">#ifndef QT_NO_OPENGL</span>
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<span class="preprocessor"># include <QtOpenGL/QGLWidget></span>
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<span class="preprocessor">#endif</span>
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VideoPlayer<span class="operator">::</span>VideoPlayer(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>WindowFlags flags)
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: <span class="type"><a href="qwidget.html">QWidget</a></span>(parent<span class="operator">,</span> flags)
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<span class="operator">,</span> videoItem(<span class="number">0</span>)
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<span class="operator">,</span> playButton(<span class="number">0</span>)
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<span class="operator">,</span> positionSlider(<span class="number">0</span>)
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{
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connect(<span class="operator">&</span>movie<span class="operator">,</span> SIGNAL(stateChanged(<span class="type"><a href="qmovie.html">QMovie</a></span><span class="operator">::</span>MovieState))<span class="operator">,</span>
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<span class="keyword">this</span><span class="operator">,</span> SLOT(movieStateChanged(<span class="type"><a href="qmovie.html">QMovie</a></span><span class="operator">::</span>MovieState)));
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connect(<span class="operator">&</span>movie<span class="operator">,</span> SIGNAL(frameChanged(<span class="type">int</span>))<span class="operator">,</span>
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<span class="keyword">this</span><span class="operator">,</span> SLOT(frameChanged(<span class="type">int</span>)));
|
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|
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videoItem <span class="operator">=</span> <span class="keyword">new</span> VideoItem;
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|
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<span class="type"><a href="qgraphicsscene.html">QGraphicsScene</a></span> <span class="operator">*</span>scene <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgraphicsscene.html">QGraphicsScene</a></span>(<span class="keyword">this</span>);
|
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<span class="type"><a href="qgraphicsview.html">QGraphicsView</a></span> <span class="operator">*</span>graphicsView <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgraphicsview.html">QGraphicsView</a></span>(scene);
|
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|
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<span class="preprocessor">#ifndef QT_NO_OPENGL</span>
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graphicsView<span class="operator">-</span><span class="operator">></span>setViewport(<span class="keyword">new</span> <span class="type"><a href="qglwidget.html">QGLWidget</a></span>);
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<span class="preprocessor">#endif</span>
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scene<span class="operator">-</span><span class="operator">></span>addItem(videoItem);
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<span class="type"><a href="qslider.html">QSlider</a></span> <span class="operator">*</span>rotateSlider <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qslider.html">QSlider</a></span>(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Horizontal);
|
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rotateSlider<span class="operator">-</span><span class="operator">></span>setRange(<span class="operator">-</span><span class="number">180</span><span class="operator">,</span> <span class="number">180</span>);
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rotateSlider<span class="operator">-</span><span class="operator">></span>setValue(<span class="number">0</span>);
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connect(rotateSlider<span class="operator">,</span> SIGNAL(valueChanged(<span class="type">int</span>))<span class="operator">,</span>
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<span class="keyword">this</span><span class="operator">,</span> SLOT(rotateVideo(<span class="type">int</span>)));
|
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|
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<span class="type"><a href="qabstractbutton.html">QAbstractButton</a></span> <span class="operator">*</span>openButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpushbutton.html">QPushButton</a></span>(tr(<span class="string">"Open..."</span>));
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connect(openButton<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(openFile()));
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playButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpushbutton.html">QPushButton</a></span>;
|
|
playButton<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">false</span>);
|
|
playButton<span class="operator">-</span><span class="operator">></span>setIcon(style()<span class="operator">-</span><span class="operator">></span>standardIcon(<span class="type"><a href="qstyle.html">QStyle</a></span><span class="operator">::</span>SP_MediaPlay));
|
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|
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connect(playButton<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span>
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<span class="keyword">this</span><span class="operator">,</span> SLOT(play()));
|
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|
|
positionSlider <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qslider.html">QSlider</a></span>(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Horizontal);
|
|
positionSlider<span class="operator">-</span><span class="operator">></span>setRange(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span>);
|
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|
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connect(positionSlider<span class="operator">,</span> SIGNAL(sliderMoved(<span class="type">int</span>))<span class="operator">,</span>
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|
<span class="keyword">this</span><span class="operator">,</span> SLOT(setPosition(<span class="type">int</span>)));
|
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|
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connect(<span class="operator">&</span>movie<span class="operator">,</span> SIGNAL(frameChanged(<span class="type">int</span>))<span class="operator">,</span>
|
|
positionSlider<span class="operator">,</span> SLOT(setValue(<span class="type">int</span>)));
|
|
|
|
<span class="type"><a href="qboxlayout.html">QBoxLayout</a></span> <span class="operator">*</span>controlLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qhboxlayout.html">QHBoxLayout</a></span>;
|
|
controlLayout<span class="operator">-</span><span class="operator">></span>setMargin(<span class="number">0</span>);
|
|
controlLayout<span class="operator">-</span><span class="operator">></span>addWidget(openButton);
|
|
controlLayout<span class="operator">-</span><span class="operator">></span>addWidget(playButton);
|
|
controlLayout<span class="operator">-</span><span class="operator">></span>addWidget(positionSlider);
|
|
|
|
<span class="type"><a href="qboxlayout.html">QBoxLayout</a></span> <span class="operator">*</span>layout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span>;
|
|
layout<span class="operator">-</span><span class="operator">></span>addWidget(graphicsView);
|
|
layout<span class="operator">-</span><span class="operator">></span>addWidget(rotateSlider);
|
|
layout<span class="operator">-</span><span class="operator">></span>addLayout(controlLayout);
|
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|
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setLayout(layout);
|
|
}
|
|
|
|
VideoPlayer<span class="operator">::</span><span class="operator">~</span>VideoPlayer()
|
|
{
|
|
}
|
|
|
|
<span class="type">void</span> VideoPlayer<span class="operator">::</span>openFile()
|
|
{
|
|
<span class="type"><a href="qstringlist.html">QStringList</a></span> supportedFormats;
|
|
foreach (<span class="type"><a href="qstring.html">QString</a></span> fmt<span class="operator">,</span> <span class="type"><a href="qmovie.html">QMovie</a></span><span class="operator">::</span>supportedFormats())
|
|
supportedFormats <span class="operator"><</span><span class="operator"><</span> fmt;
|
|
foreach (<span class="type"><a href="qstring.html">QString</a></span> fmt<span class="operator">,</span> <span class="type"><a href="qimagereader.html">QImageReader</a></span><span class="operator">::</span>supportedImageFormats())
|
|
supportedFormats <span class="operator"><</span><span class="operator"><</span> fmt;
|
|
|
|
<span class="type"><a href="qstring.html">QString</a></span> filter <span class="operator">=</span> <span class="string">"Images ("</span>;
|
|
foreach ( <span class="type"><a href="qstring.html">QString</a></span> fmt<span class="operator">,</span> supportedFormats) {
|
|
filter<span class="operator">.</span>append(<span class="type"><a href="qstring.html">QString</a></span>(<span class="string">"*.%1 "</span>)<span class="operator">.</span>arg(fmt));
|
|
}
|
|
filter<span class="operator">.</span>append(<span class="string">")"</span>);
|
|
|
|
<span class="type"><a href="qstring.html">QString</a></span> fileName <span class="operator">=</span> <span class="type"><a href="qfiledialog.html">QFileDialog</a></span><span class="operator">::</span>getOpenFileName(<span class="keyword">this</span><span class="operator">,</span> tr(<span class="string">"Open Movie"</span>)<span class="operator">,</span>
|
|
<span class="type"><a href="qdir.html">QDir</a></span><span class="operator">::</span>homePath()<span class="operator">,</span> filter);
|
|
|
|
<span class="keyword">if</span> (<span class="operator">!</span>fileName<span class="operator">.</span>isEmpty()) {
|
|
videoItem<span class="operator">-</span><span class="operator">></span>stop();
|
|
|
|
movie<span class="operator">.</span>setFileName(fileName);
|
|
|
|
playButton<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">true</span>);
|
|
positionSlider<span class="operator">-</span><span class="operator">></span>setMaximum(movie<span class="operator">.</span>frameCount());
|
|
|
|
movie<span class="operator">.</span>jumpToFrame(<span class="number">0</span>);
|
|
}
|
|
}
|
|
|
|
<span class="type">void</span> VideoPlayer<span class="operator">::</span>play()
|
|
{
|
|
<span class="keyword">switch</span>(movie<span class="operator">.</span>state()) {
|
|
<span class="keyword">case</span> <span class="type"><a href="qmovie.html">QMovie</a></span><span class="operator">::</span>NotRunning:
|
|
movie<span class="operator">.</span>start();
|
|
<span class="keyword">break</span>;
|
|
<span class="keyword">case</span> <span class="type"><a href="qmovie.html">QMovie</a></span><span class="operator">::</span>Paused:
|
|
movie<span class="operator">.</span>setPaused(<span class="keyword">false</span>);
|
|
<span class="keyword">break</span>;
|
|
<span class="keyword">case</span> <span class="type"><a href="qmovie.html">QMovie</a></span><span class="operator">::</span>Running:
|
|
movie<span class="operator">.</span>setPaused(<span class="keyword">true</span>);
|
|
<span class="keyword">break</span>;
|
|
}
|
|
}
|
|
|
|
<span class="type">void</span> VideoPlayer<span class="operator">::</span>movieStateChanged(<span class="type"><a href="qmovie.html">QMovie</a></span><span class="operator">::</span>MovieState state)
|
|
{
|
|
<span class="keyword">switch</span>(state) {
|
|
<span class="keyword">case</span> <span class="type"><a href="qmovie.html">QMovie</a></span><span class="operator">::</span>NotRunning:
|
|
<span class="keyword">case</span> <span class="type"><a href="qmovie.html">QMovie</a></span><span class="operator">::</span>Paused:
|
|
playButton<span class="operator">-</span><span class="operator">></span>setIcon(style()<span class="operator">-</span><span class="operator">></span>standardIcon(<span class="type"><a href="qstyle.html">QStyle</a></span><span class="operator">::</span>SP_MediaPlay));
|
|
<span class="keyword">break</span>;
|
|
<span class="keyword">case</span> <span class="type"><a href="qmovie.html">QMovie</a></span><span class="operator">::</span>Running:
|
|
playButton<span class="operator">-</span><span class="operator">></span>setIcon(style()<span class="operator">-</span><span class="operator">></span>standardIcon(<span class="type"><a href="qstyle.html">QStyle</a></span><span class="operator">::</span>SP_MediaPause));
|
|
<span class="keyword">break</span>;
|
|
}
|
|
}
|
|
|
|
<span class="type">void</span> VideoPlayer<span class="operator">::</span>frameChanged(<span class="type">int</span> frame)
|
|
{
|
|
<span class="keyword">if</span> (<span class="operator">!</span>presentImage(movie<span class="operator">.</span>currentImage())) {
|
|
movie<span class="operator">.</span>stop();
|
|
playButton<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">false</span>);
|
|
positionSlider<span class="operator">-</span><span class="operator">></span>setMaximum(<span class="number">0</span>);
|
|
} <span class="keyword">else</span> {
|
|
positionSlider<span class="operator">-</span><span class="operator">></span>setValue(frame);
|
|
}
|
|
}
|
|
|
|
<span class="type">void</span> VideoPlayer<span class="operator">::</span>setPosition(<span class="type">int</span> frame)
|
|
{
|
|
movie<span class="operator">.</span>jumpToFrame(frame);
|
|
}
|
|
|
|
<span class="type">void</span> VideoPlayer<span class="operator">::</span>rotateVideo(<span class="type">int</span> angle)
|
|
{
|
|
<span class="comment">//rotate around the center of video element</span>
|
|
<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> x <span class="operator">=</span> videoItem<span class="operator">-</span><span class="operator">></span>boundingRect()<span class="operator">.</span>width() <span class="operator">/</span> <span class="number">2.0</span>;
|
|
<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> y <span class="operator">=</span> videoItem<span class="operator">-</span><span class="operator">></span>boundingRect()<span class="operator">.</span>height() <span class="operator">/</span> <span class="number">2.0</span>;
|
|
videoItem<span class="operator">-</span><span class="operator">></span>setTransform(<span class="type"><a href="qtransform.html">QTransform</a></span>()<span class="operator">.</span>translate(x<span class="operator">,</span> y)<span class="operator">.</span>rotate(angle)<span class="operator">.</span>translate(<span class="operator">-</span>x<span class="operator">,</span> <span class="operator">-</span>y));
|
|
}
|
|
|
|
<span class="type">bool</span> VideoPlayer<span class="operator">::</span>presentImage(<span class="keyword">const</span> <span class="type"><a href="qimage.html">QImage</a></span> <span class="operator">&</span>image)
|
|
{
|
|
<span class="type"><a href="qvideoframe.html">QVideoFrame</a></span> frame(image);
|
|
|
|
<span class="keyword">if</span> (<span class="operator">!</span>frame<span class="operator">.</span>isValid())
|
|
<span class="keyword">return</span> <span class="keyword">false</span>;
|
|
|
|
<span class="type"><a href="qvideosurfaceformat.html">QVideoSurfaceFormat</a></span> currentFormat <span class="operator">=</span> videoItem<span class="operator">-</span><span class="operator">></span>surfaceFormat();
|
|
|
|
<span class="keyword">if</span> (frame<span class="operator">.</span>pixelFormat() <span class="operator">!</span><span class="operator">=</span> currentFormat<span class="operator">.</span>pixelFormat()
|
|
<span class="operator">|</span><span class="operator">|</span> frame<span class="operator">.</span>size() <span class="operator">!</span><span class="operator">=</span> currentFormat<span class="operator">.</span>frameSize()) {
|
|
<span class="type"><a href="qvideosurfaceformat.html">QVideoSurfaceFormat</a></span> format(frame<span class="operator">.</span>size()<span class="operator">,</span> frame<span class="operator">.</span>pixelFormat());
|
|
|
|
<span class="keyword">if</span> (<span class="operator">!</span>videoItem<span class="operator">-</span><span class="operator">></span>start(format))
|
|
<span class="keyword">return</span> <span class="keyword">false</span>;
|
|
}
|
|
|
|
<span class="keyword">if</span> (<span class="operator">!</span>videoItem<span class="operator">-</span><span class="operator">></span>present(frame)) {
|
|
videoItem<span class="operator">-</span><span class="operator">></span>stop();
|
|
|
|
<span class="keyword">return</span> <span class="keyword">false</span>;
|
|
} <span class="keyword">else</span> {
|
|
<span class="keyword">return</span> <span class="keyword">true</span>;
|
|
}
|
|
}</pre>
|
|
</div>
|
|
<!-- @@@multimedia/videographicsitem/videoplayer.cpp -->
|
|
</div>
|
|
</div>
|
|
</div>
|
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|
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<span></span>
|
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</div>
|
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|
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|
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<p>
|
|
<acronym title="Copyright">©</acronym> 2015 The Qt Company Ltd.
|
|
Documentation contributions included herein are the copyrights of
|
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their respective owners.</p>
|
|
<br />
|
|
<p>
|
|
The documentation provided herein is licensed under the terms of the
|
|
<a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation
|
|
License version 1.3</a> as published by the Free Software Foundation.</p>
|
|
<p>
|
|
Documentation sources may be obtained from <a href="http://www.qt-project.org">
|
|
www.qt-project.org</a>.</p>
|
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<br />
|
|
<p>
|
|
Qt and respective logos are trademarks of The Qt Company Ltd
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in Finland and/or other countries worldwide. All other trademarks are property
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href="http://en.gitorious.org/privacy_policy/">Privacy Policy</a></p>
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