115 lines
3.5 KiB
C++
115 lines
3.5 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 2015)
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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_PACKETBUFFER_H
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#define QTAV_PACKETBUFFER_H
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#include <QtCore/QQueue>
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#include "Packet.h"
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#include "BlockingQueue.h"
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#include "ring.h"
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namespace FAV {
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/*
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* take empty: start buffering, block at next take if still empty
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* take enough: start to put more packets
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* put enough: end buffering, end take block
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* put full: stop putting more packets
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*/
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class PacketBuffer : public BlockingQueue<Packet, QQueue>
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{
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public:
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PacketBuffer();
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~PacketBuffer();
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void setBufferMode(BufferMode mode);
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BufferMode bufferMode() const;
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/*!
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* \brief setBufferValue
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* Ensure the buffered msecs/bytes/packets in queue is at least the given value
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* \param value BufferBytes: bytes, BufferTime: msecs, BufferPackets: packets count
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*/
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void setBufferValue(qint64 value);
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qint64 bufferValue() const;
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/*!
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* \brief setBufferMax
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* stop buffering if max value reached. Real value is bufferValue()*bufferMax()
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* \param max the ratio to bufferValue(). always >= 1.0
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*/
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void setBufferMax(qreal max);
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qreal bufferMax() const;
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/*!
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* \brief buffered
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* Current buffered value in the queue
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*/
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qint64 buffered() const;
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bool isBuffering() const;
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/*!
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* \brief bufferProgress
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* How much of the data buffer is currently filled, from 0.0 (empty) to 1.0 (enough or full).
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* bufferProgress() can be less than 1 if not isBuffering();
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* \return Percent of buffered time, bytes or packets.
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*/
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qreal bufferProgress() const;
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/*!
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* \brief bufferSpeed
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* Depending on BufferMode, the result is delta_pts/s, packets/s or bytes/s
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* \return
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*/
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qreal bufferSpeed() const;
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qreal bufferSpeedInBytes() const;
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protected:
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bool checkEnough() const Q_DECL_OVERRIDE;
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bool checkFull() const Q_DECL_OVERRIDE;
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void onTake(const Packet &) Q_DECL_OVERRIDE;
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void onPut(const Packet &) Q_DECL_OVERRIDE;
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protected:
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typedef BlockingQueue<Packet, QQueue> PQ;
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using PQ::setCapacity;
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using PQ::setThreshold;
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using PQ::capacity;
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using PQ::threshold;
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private:
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qreal calc_speed(bool use_bytes) const;
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BufferMode m_mode;
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bool m_buffering;
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qreal m_max;
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// bytes or count
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qint64 m_buffer;
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qint64 m_value0, m_value1;
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typedef struct {
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qint64 v; //pts, total packes or total bytes
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qint64 bytes; //total bytes
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qint64 t;
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} BufferInfo;
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ring<BufferInfo> m_history;
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};
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} //namespace FAV
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#endif // QTAV_PACKETBUFFER_H
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