85 lines
2.6 KiB
C++
85 lines
2.6 KiB
C++
/******************************************************************************
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QtAV: Multimedia framework based on Qt and FFmpeg
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Copyright (C) 2012-2016 Wang Bin <wbsecg1@gmail.com>
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* This file is part of QtAV (from 2016)
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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******************************************************************************/
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#ifndef QTAV_FRAMEREADER_H
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#define QTAV_FRAMEREADER_H
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#include <QtCore/QObject>
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#include "VideoFrame.h"
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namespace FAV {
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/*!
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* \brief The FrameReader class
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* while (reader->readMore()) {
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* while (reader->hasVideoFrame()) { //or hasEnoughVideoFrames()
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* reader->getVideoFrame();
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* ...
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* }
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* }
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* or (faster)
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* while (reader->readMore()) {
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* reader->getVideoFrame(); //we can ensure 1 frame is available, but may block here
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* }
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* while (r.hasVideoFrame()) { //get buffered frames
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* reader->getVideoFrame();
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* }
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* TODO: multiple tracks
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*/
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class Q_AV_EXPORT FrameReader : public QObject
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{
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Q_OBJECT
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public:
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// TODO: load and get info
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// TODO: asnyc option
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explicit FrameReader(QObject *parent = 0);
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~FrameReader();
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void setMedia(const QString& url);
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QString mediaUrl() const;
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void setVideoDecoders(const QStringList& names);
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QStringList videoDecoders() const;
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VideoFrame getVideoFrame();
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bool hasVideoFrame() const;
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bool hasEnoughVideoFrames() const;
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// return false if eof
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bool readMore();
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// TODO: tryLoad on seek even at eof
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// TODO: compress seek requests
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bool seek(qint64 pos);
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Q_SIGNALS:
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void frameRead(const FAV::VideoFrame& frame);
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void readEnd();
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void seekFinished(qint64 pos);
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// internal
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void readMoreRequested();
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void seekRequested(qint64);
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private Q_SLOTS:
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void readMoreInternal();
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bool seekInternal(qint64 value);
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private:
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class Private;
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QScopedPointer<Private> d;
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};
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} //namespace FAV
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#endif // QTAV_FRAMEREADER_H
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