137 lines
3.7 KiB
C++
137 lines
3.7 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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* Copyright (c) 2011 Steven Lovegrove
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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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#include <pangolin/factory/factory_registry.h>
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#include <pangolin/utils/file_utils.h>
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#include <pangolin/video/drivers/pvn.h>
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#include <pangolin/video/iostream_operators.h>
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#include <iostream>
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using namespace std;
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namespace pangolin
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{
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PvnVideo::PvnVideo(const std::string& filename, bool realtime )
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: frame_size_bytes(0), realtime(realtime), last_frame(TimeNow())
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{
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file.open( PathExpand(filename).c_str(), ios::binary );
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if(!file.is_open() )
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throw VideoException("Cannot open file - does not exist or bad permissions.");
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ReadFileHeader();
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}
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PvnVideo::~PvnVideo()
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{
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}
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void PvnVideo::ReadFileHeader()
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{
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string sfmt;
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float framerate;
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unsigned w, h;
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file >> sfmt;
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file >> w;
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file >> h;
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file >> framerate;
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file.get();
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if(file.bad() || !(w >0 && h >0) )
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throw VideoException("Unable to read video header");
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const PixelFormat fmt = PixelFormatFromString(sfmt);
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StreamInfo strm0( fmt, w, h, (w*fmt.bpp) / 8, 0);
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frame_size_bytes += strm0.Pitch() * strm0.Height();
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// frame_interval = TimeFromSeconds( 1.0 / framerate);
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streams.push_back(strm0);
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}
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void PvnVideo::Start()
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{
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}
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void PvnVideo::Stop()
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{
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}
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size_t PvnVideo::SizeBytes() const
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{
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return frame_size_bytes;
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}
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const std::vector<StreamInfo>& PvnVideo::Streams() const
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{
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return streams;
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}
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bool PvnVideo::GrabNext( unsigned char* image, bool /*wait*/ )
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{
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file.read((char*)image, frame_size_bytes);
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const basetime next_frame = TimeAdd(last_frame, frame_interval);
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if( realtime ) {
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WaitUntil(next_frame);
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}
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last_frame = TimeNow();
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return file.good();
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}
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bool PvnVideo::GrabNewest( unsigned char* image, bool wait )
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{
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return GrabNext(image,wait);
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}
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PANGOLIN_REGISTER_FACTORY(PvnVideo)
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{
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struct PvnVideoFactory final : public FactoryInterface<VideoInterface> {
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std::unique_ptr<VideoInterface> Open(const Uri& uri) override {
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const std::string path = PathExpand(uri.url);
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if( !uri.scheme.compare("pvn") || FileType(uri.url) == ImageFileTypePvn ) {
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const bool realtime = uri.Contains("realtime");
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return std::unique_ptr<VideoInterface>(new PvnVideo(path.c_str(), realtime));
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}
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return std::unique_ptr<VideoInterface>();
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}
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};
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auto factory = std::make_shared<PvnVideoFactory>();
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FactoryRegistry<VideoInterface>::I().RegisterFactory(factory, 10, "pvn");
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FactoryRegistry<VideoInterface>::I().RegisterFactory(factory, 10, "file");
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}
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}
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