f04e711ea3
Add a new `QtFrameGrabber` class that implements the `css::media::XFrameGrabber` interface and return an instance of it in `QtPlayer::createFrameGrabber`. As there seems to be no direct way to retrieve the image/frame of a video at a certain point in time, create a separate `QMediaPlayer` instance for the `QtFrameGrabber`, set a video sink, connect to its `&QVideoSink::videoFrameChanged` signal and start playing the video (and stop it again once the first frame has been received) in order to retrieve a corresponding frame. From that `QVideoFrame`, a `QImage` can be retrieved that can then be converted to an `XGraphic`. With this in place, a frame from the actual video is now displaced in Impress in non-presentation mode instead of just a generic "video icon" placeholder when opening a presentation containing a video, (e.g. attachment 145517 from tdf#120452) when the qt6 VCL plugin is in use. Change-Id: I3bba3c0fb62a219ac632ceed03ec17f9078f18d0 Reviewed-on: https://gerrit.libreoffice.org/c/core/+/168255 Tested-by: Jenkins Reviewed-by: Michael Weghorn <m.weghorn@posteo.de>
50 lines
1.4 KiB
C++
50 lines
1.4 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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#pragma once
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#include <mutex>
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#include <QtCore/QObject>
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#include <QtMultimedia/QMediaPlayer>
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#include <QtMultimedia/QVideoFrame>
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#include <QtMultimedia/QVideoSink>
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#include <com/sun/star/graphic/XGraphic.hpp>
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#include <com/sun/star/media/XFrameGrabber.hpp>
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#include <comphelper/compbase.hxx>
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namespace avmedia::qt
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{
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class QtFrameGrabber : public QObject, public ::cppu::WeakImplHelper<css::media::XFrameGrabber>
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{
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Q_OBJECT
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private:
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std::unique_ptr<QVideoSink> m_xVideoSink;
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std::unique_ptr<QMediaPlayer> m_xMediaPlayer;
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std::recursive_mutex m_aMutex;
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bool m_bWaitingForFrame;
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css::uno::Reference<css::graphic::XGraphic> m_xGraphic;
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public:
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QtFrameGrabber(const QUrl& rSourceUrl);
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virtual css::uno::Reference<css::graphic::XGraphic>
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SAL_CALL grabFrame(double fMediaTime) override;
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private slots:
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void onErrorOccured(QMediaPlayer::Error eError, const QString& rErrorString);
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void onVideoFrameChanged(const QVideoFrame& rFrame);
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};
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} // namespace avmedia::qt
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/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */
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