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Diffstat (limited to 'examples/player/player.h')
-rw-r--r-- | examples/player/player.h | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/examples/player/player.h b/examples/player/player.h new file mode 100644 index 0000000..ac442b0 --- /dev/null +++ b/examples/player/player.h @@ -0,0 +1,76 @@ +/* + Copyright (C) 2010 George Kiagiadakis <kiagiadakis.george@gmail.com> + Copyright (C) 2010 Marco Ballesio <gibrovacco@gmail.com> + + This library is free software; you can redistribute it and/or modify + it under the terms of the GNU Lesser General Public License as published + by the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#ifndef __PLAYER_H__ +#define __PLAYER_H__ + +#include <QtCore/QEvent> +#include <QtCore/QTimer> +#include <QtCore/QString> +#include <QtCore/QTime> +#include <QGst/Global> +#include <QGst/Pipeline> +#include <QGst/Ui/VideoWidget> + +/* This is a simple example of a command-line player. It accepts the URI of + * an media file as the first command line argument and then constructs a pipeline + * that uses playbin2 to decode the stream. + * In the future this example will perhaps gain a simple GUI. */ + +class Player : public QGst::Ui::VideoWidget +{ + Q_OBJECT; + public: + Player(QWidget *parent = 0); + ~Player(); + + void setUri(const QString &uri); + QTime position(); + QTime length(); + QGst::State state(); + + /* Everything is compiled with QT_NO_KEYWORDS because otherwise Signals::emit wouldn't compile + * so use Q_SLOTS instead of "slots" */ + public Q_SLOTS: + void stop(); + void play(); + void pause(); + void setPosition(QTime pos); + void updatePosition(); + +Q_SIGNALS: + void positionChanged(QTime); + void stateChanged(QGst::State state); + + private: + void busMessage(const QGst::MessagePtr & message); + void elementAdded(const QGst::ElementPtr & element); + void handleStateChange(QGst::StateChangedMessagePtr); + QGst::XOverlayPtr binVideoSink(QGst::BinPtr & bin); + + /* This smart pointer is needed to keep a reference to the underlying GstPipeline object. + * Even if we are not going to use it, we must keep a reference to the pipeline, + * so that it remains in memory, together with all its child elements. If this + * reference is gone, the pipeline and all the elements will be destroyed. + * Note that we don't need to keep references to the individual elements, because + * when they are added in the pipeline, the pipeline keeps a reference on them. */ + QGst::PipelinePtr m_pipeline; + QTimer m_positionTimer; +}; + +#endif |