98 lines
3.9 KiB
C++
98 lines
3.9 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
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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 QAV_DECODER_H
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#define QAV_DECODER_H
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#include "AVError.h"
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#include <QtCore/QVariant>
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#include <QtCore/QObject>
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namespace FAV {
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class Packet;
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class AVDecoderPrivate;
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class Q_AV_EXPORT AVDecoder : public QObject
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{
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Q_OBJECT
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DPTR_DECLARE_PRIVATE(AVDecoder)
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//Q_PROPERTY(QString description READ description NOTIFY descriptionChanged)
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public:
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virtual ~AVDecoder();
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virtual QString name() const;
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virtual QString description() const;
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/*!
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* default is open FFmpeg codec context
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* codec config must be done before open
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* NOTE: open() and close() are not thread safe. You'd better call them in the same thread.
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*/
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virtual bool open();
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virtual bool close();
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bool isOpen() const;
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virtual void flush();
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void setCodecContext(void* codecCtx); //protected
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void* codecContext() const;
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/*not available if AVCodecContext == 0*/
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bool isAvailable() const;
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#if (PLAY_SYNC_FIX2)
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virtual bool send(const Packet* packet) = 0;
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virtual bool receive() = 0;
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#endif // PLAY_SYNC_FIX2
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virtual bool decode(const Packet& packet) = 0;
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int undecodedSize() const; //TODO: remove. always decode whole input data completely
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// avcodec_open2
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/*!
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* \brief setOptions
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* 1. If has key "avcodec", it's value (suboption, a hash or map) will be used to set AVCodecContext use av_opt_set and av_dict_set. A value of hash type is ignored.
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* we can ignore the flags used in av_dict_xxx because we can use hash api.
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* empty value does nothing to current context if it is open, but will clear AVDictionary in the next open.
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* AVDictionary is used in avcodec_open2() and will not change unless user call setOptions().
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* 2. Set QObject properties for AVDecoder. Use AVDecoder::name() or lower case as a key to set properties. If key not found, assume key is "avcodec"
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* 3. If no ket AVDecoder::name() found in the option, set key-value pairs as QObject property-value pairs.
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* \param dict
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* example:
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* "avcodec": {"vismv":"pf"}, "vaapi":{"display":"DRM"}, "copyMode": "ZeroCopy"
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* means set avcodec context option vismv=>pf, VA-API display (qt property) to DRM when using VA-API, set copyMode (GPU decoders) property to ZeroCopy
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*/
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void setOptions(const QVariantHash &dict);
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QVariantHash options() const;
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Q_SIGNALS:
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void error(const FAV::AVError& e); //explictly use FAV::AVError in connection for Qt4 syntax
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void descriptionChanged();
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protected:
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AVDecoder(AVDecoderPrivate& d);
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DPTR_DECLARE(AVDecoder)
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// force a codec. only used by avcodec sw decoders. TODO: move to public? profile set?
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void setCodecName(const QString& name);
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QString codecName() const;
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virtual void codecNameChanged() {}//signals can not be decared virtual (winrt)
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private:
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Q_DISABLE_COPY(AVDecoder)
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AVDecoder(); // base class, not direct create. only final class has is enough
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};
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} //namespace FAV
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#endif // QAV_DECODER_H
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