112 lines
2.6 KiB
C++
112 lines
2.6 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 <pangolin/platform.h>
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#include <pangolin/log/packetstream_tags.h>
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#include <pangolin/utils/file_utils.h>
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namespace pangolin
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{
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class PacketStream: public std::ifstream
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{
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public:
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PacketStream()
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: _is_pipe(false)
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{
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cclear();
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}
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PacketStream(const std::string& filename)
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: Base(filename.c_str(), std::ios::in | std::ios::binary),
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_is_pipe(IsPipe(filename))
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{
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cclear();
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}
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bool seekable() const
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{
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return is_open() && !_is_pipe;
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}
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void open(const std::string& filename)
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{
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close();
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_is_pipe = IsPipe(filename);
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Base::open(filename.c_str(), std::ios::in | std::ios::binary);
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}
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void close()
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{
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cclear();
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if (Base::is_open()) Base::close();
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}
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void seekg(std::streampos target);
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void seekg(std::streamoff off, std::ios_base::seekdir way);
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std::streampos tellg();
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size_t read(char* target, size_t len);
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char get();
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size_t skip(size_t len);
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size_t readUINT();
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int64_t readTimestamp();
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pangoTagType peekTag();
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pangoTagType readTag();
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pangoTagType readTag(pangoTagType);
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pangoTagType syncToTag();
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private:
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using Base = std::ifstream;
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bool _is_pipe;
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pangoTagType _tag;
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// Amount of frame data left to read. Tracks our position within a data block.
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void cclear() {
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_tag = 0;
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}
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};
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}
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