121 lines
2.7 KiB
C++
121 lines
2.7 KiB
C++
/* This file is part of the Pangolin Project.
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* http://github.com/stevenlovegrove/Pangolin
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use,
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* copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following
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* conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#pragma once
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#include <fstream>
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#include <mutex>
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#include <thread>
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#include <pangolin/log/packet.h>
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#include <pangolin/log/sync_time.h>
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#include <pangolin/utils/file_utils.h>
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#include <pangolin/utils/timer.h>
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namespace pangolin
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{
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class PANGOLIN_EXPORT PacketStreamReader
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{
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public:
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PacketStreamReader();
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PacketStreamReader(const std::string& filename);
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~PacketStreamReader();
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void Open(const std::string& filename);
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void Close();
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const std::vector<PacketStreamSource>&
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Sources() const
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{
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return _sources;
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}
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// Grab Next available frame packetstream
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Packet NextFrame();
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// Grab Next available frame in packetstream from src, discarding other frames.
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Packet NextFrame(PacketStreamSourceId src);
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bool Good() const
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{
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return _stream.good();
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}
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// Jumps to a particular packet.
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size_t Seek(PacketStreamSourceId src, size_t framenum);
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// Jumps to the first packet with time >= time
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size_t Seek(PacketStreamSourceId src, SyncTime::TimePoint time);
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void FixFileIndex();
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private:
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bool GoodToRead();
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bool SetupIndex();
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void ParseHeader();
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void ParseNewSource();
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bool ParseIndex();
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void RebuildIndex();
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void AppendIndex();
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std::streampos ParseFooter();
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void SkipSync();
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void ReSync() {
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_stream.syncToTag();
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}
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std::string _filename;
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std::vector<PacketStreamSource> _sources;
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SyncTime::TimePoint packet_stream_start;
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PacketStream _stream;
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std::recursive_mutex _mutex;
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bool _is_pipe;
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int _pipe_fd;
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};
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}
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