zoneminder/src/zm_packetqueue.h

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//ZoneMinder Packet Queue Interface Class
//Copyright 2016 Steve Gilvarry
//
//This file is part of ZoneMinder.
//
//ZoneMinder is free software: you can redistribute it and/or modify
//it under the terms of the GNU General Public License as published by
//the Free Software Foundation, either version 3 of the License, or
//(at your option) any later version.
//
//ZoneMinder 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 General Public License
//along with ZoneMinder. If not, see <http://www.gnu.org/licenses/>.
#ifndef ZM_PACKETQUEUE_H
#define ZM_PACKETQUEUE_H
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//#include <boost/interprocess/managed_shared_memory.hpp>
//#include <boost/interprocess/containers/map.hpp>
//#include <boost/interprocess/allocators/allocator.hpp>
#include <list>
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#include "zm_packet.h"
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#include "zm_thread.h"
#include <mutex>
#include <condition_variable>
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extern "C" {
#include <libavformat/avformat.h>
}
class zm_packetqueue {
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public: // For now just to ease development
std::list<ZMPacket *> pktQueue;
std::list<ZMPacket *>::iterator analysis_it;
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int video_stream_id;
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int max_video_packet_count; // allow a negative value to someday mean unlimited
int max_stream_id;
int *packet_counts; /* packet count for each stream_id, to keep track of how many video vs audio packets are in the queue */
bool deleting;
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std::mutex mutex;
std::condition_variable condition;
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public:
zm_packetqueue(int p_max_video_packet_count, int p_video_stream_id, int p_audio_stream_id);
virtual ~zm_packetqueue();
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bool queuePacket(ZMPacket* packet);
ZMPacket * popPacket();
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bool popVideoPacket(ZMPacket* packet);
bool popAudioPacket(ZMPacket* packet);
unsigned int clearQueue(unsigned int video_frames_to_keep, int stream_id);
unsigned int clearQueue(struct timeval *duration, int streamid);
void clearQueue();
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void dumpQueue();
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unsigned int size();
unsigned int get_packet_count(int stream_id) const { return packet_counts[stream_id]; };
void clear_unwanted_packets(timeval *recording, int pre_event_count, int mVideoStreamId);
int packet_count(int stream_id);
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// Functions to manage the analysis frame logic
bool increment_analysis_it();
ZMPacket *get_analysis_packet();
std::list<ZMPacket *>::iterator get_analysis_it() const { return analysis_it; }
std::list<ZMPacket *>::iterator get_event_start_packet_it(
std::list<ZMPacket *>::iterator snapshot_it,
unsigned int pre_event_count
);
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};
#endif /* ZM_PACKETQUEUE_H */