frame_source.cpp 4.18 KB
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/*M///////////////////////////////////////////////////////////////////////////////////////
//
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//
//  By downloading, copying, installing or using the software you agree to this license.
//  If you do not agree to this license, do not download, install,
//  copy or use the software.
//
//
//                           License Agreement
//                For Open Source Computer Vision Library
//
// Copyright (C) 2000-2008, Intel Corporation, all rights reserved.
// Copyright (C) 2009-2011, Willow Garage Inc., all rights reserved.
// Third party copyrights are property of their respective owners.
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// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:
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#include "precomp.hpp"
#include "opencv2/videostab/frame_source.hpp"
#include "opencv2/videostab/ring_buffer.hpp"
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#include "opencv2/opencv_modules.hpp"
#ifdef HAVE_OPENCV_VIDEOIO
#  include "opencv2/videoio.hpp"
#endif
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namespace cv
{
namespace videostab
{

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namespace {
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class VideoFileSourceImpl : public IFrameSource
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{
public:
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    VideoFileSourceImpl(const String &path, bool volatileFrame)
        : path_(path), volatileFrame_(volatileFrame) { reset(); }

    virtual void reset()
    {
#ifdef HAVE_OPENCV_VIDEOIO
        vc.release();
        vc.open(path_);
        if (!vc.isOpened())
            CV_Error(0, "can't open file: " + path_);
#else
        CV_Error(Error::StsNotImplemented, "OpenCV has been compiled without video I/O support");
#endif
    }
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    virtual Mat nextFrame()
    {
        Mat frame;
#ifdef HAVE_OPENCV_VIDEOIO
        vc >> frame;
#endif
        return volatileFrame_ ? frame : frame.clone();
    }

#ifdef HAVE_OPENCV_VIDEOIO
    int width() {return static_cast<int>(vc.get(CAP_PROP_FRAME_WIDTH));}
    int height() {return static_cast<int>(vc.get(CAP_PROP_FRAME_HEIGHT));}
    int count() {return static_cast<int>(vc.get(CAP_PROP_FRAME_COUNT));}
    double fps() {return vc.get(CAP_PROP_FPS);}
#else
    int width() {return 0;}
    int height() {return 0;}
    int count() {return 0;}
    double fps() {return 0;}
#endif
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private:
    String path_;
    bool volatileFrame_;
#ifdef HAVE_OPENCV_VIDEOIO
    VideoCapture vc;
#endif
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};

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}//namespace
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VideoFileSource::VideoFileSource(const String &path, bool volatileFrame)
    : impl(new VideoFileSourceImpl(path, volatileFrame)) {}
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void VideoFileSource::reset() { impl->reset(); }
Mat VideoFileSource::nextFrame() { return impl->nextFrame(); }
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int VideoFileSource::width() { return ((VideoFileSourceImpl*)impl.get())->width(); }
int VideoFileSource::height() { return ((VideoFileSourceImpl*)impl.get())->height(); }
int VideoFileSource::count() { return ((VideoFileSourceImpl*)impl.get())->count(); }
double VideoFileSource::fps() { return ((VideoFileSourceImpl*)impl.get())->fps(); }
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} // namespace videostab
} // namespace cv