CapturePluginHighgui.cpp
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00001 /*
00002  * This file is part of ALVAR, A Library for Virtual and Augmented Reality.
00003  *
00004  * Copyright 2007-2012 VTT Technical Research Centre of Finland
00005  *
00006  * Contact: VTT Augmented Reality Team <alvar.info@vtt.fi>
00007  *          <http://www.vtt.fi/multimedia/alvar.html>
00008  *
00009  * ALVAR is free software; you can redistribute it and/or modify it under the
00010  * terms of the GNU Lesser General Public License as published by the Free
00011  * Software Foundation; either version 2.1 of the License, or (at your option)
00012  * any later version.
00013  *
00014  * This library is distributed in the hope that it will be useful, but WITHOUT
00015  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
00016  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
00017  * for more details.
00018  *
00019  * You should have received a copy of the GNU Lesser General Public License
00020  * along with ALVAR; if not, see
00021  * <http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html>.
00022  */
00023 
00024 #include "CapturePluginHighgui.h"
00025 
00026 #include <sstream>
00027 
00028 namespace alvar {
00029 namespace plugins {
00030 
00031 CaptureHighgui::CaptureHighgui(const CaptureDevice captureDevice)
00032     : Capture(captureDevice)
00033     , mVideoCapture()
00034     , mMatrix()
00035     , mImage()
00036 {
00037 }
00038 
00039 CaptureHighgui::~CaptureHighgui()
00040 {
00041     stop();
00042 }
00043 
00044 void CaptureHighgui::setResolution(const unsigned long xResolution, const unsigned long yResolution)
00045 {
00046     if (mVideoCapture.isOpened()) {
00047         mVideoCapture.set(CV_CAP_PROP_FRAME_WIDTH, xResolution);
00048         mVideoCapture.set(CV_CAP_PROP_FRAME_HEIGHT, yResolution);
00049         mXResolution = (int)mVideoCapture.get(CV_CAP_PROP_FRAME_WIDTH);
00050         mYResolution = (int)mVideoCapture.get(CV_CAP_PROP_FRAME_HEIGHT);
00051     }
00052 }
00053 
00054 bool CaptureHighgui::start()
00055 {
00056     if (isCapturing()) {
00057         return isCapturing();
00058     }
00059 
00060     std::istringstream convert(captureDevice().id());
00061     int id;
00062     convert >> id;
00063 
00064     mVideoCapture.open(id);
00065     if (mVideoCapture.isOpened()) {
00066         mIsCapturing = true;
00067     }
00068 
00069     return isCapturing();
00070 }
00071 
00072 void CaptureHighgui::stop()
00073 {
00074     if (isCapturing()) {
00075         mVideoCapture.release();
00076         mIsCapturing = false;
00077     }
00078 }
00079 
00080 IplImage *CaptureHighgui::captureImage()
00081 {
00082     if (!isCapturing()) {
00083         return NULL;
00084     }
00085     if (!mVideoCapture.grab()) {
00086         return NULL;
00087     }
00088     mVideoCapture.retrieve(mMatrix);
00089     mImage = mMatrix;
00090     return &mImage;
00091 }
00092 
00093 bool CaptureHighgui::showSettingsDialog()
00094 {
00095     // TODO: implement this method
00096     return false;
00097 }
00098 
00099 std::string CaptureHighgui::SerializeId()
00100 {
00101     return "CaptureHighgui";
00102 }
00103 
00104 bool CaptureHighgui::Serialize(Serialization *serialization)
00105 {
00106     return false;
00107 }
00108 
00109 CapturePluginHighgui::CapturePluginHighgui(const std::string &captureType)
00110     : CapturePlugin(captureType)
00111 {
00112 }
00113 
00114 CapturePluginHighgui::~CapturePluginHighgui()
00115 {
00116 }
00117 
00118 CapturePlugin::CaptureDeviceVector CapturePluginHighgui::enumerateDevices()
00119 {
00120     CaptureDeviceVector devices;
00121 
00122     bool loop = true;
00123     int id = 0;
00124     cv::VideoCapture videoCapture;
00125     
00126     while (loop) {
00127         std::stringstream convert;
00128         convert << id;
00129         CaptureDevice captureDevice(mCaptureType, convert.str());
00130         
00131         videoCapture.open(id);
00132         if (videoCapture.isOpened()) {
00133             int width = (int)videoCapture.get(CV_CAP_PROP_FRAME_WIDTH);
00134             int height = (int)videoCapture.get(CV_CAP_PROP_FRAME_HEIGHT);
00135             if (width > 0 && height > 0) {
00136                 devices.push_back(captureDevice);
00137             }
00138             else {
00139                 loop = false;
00140             }
00141         }
00142         else {
00143             loop = false;
00144         }
00145 
00146         id++;
00147     }
00148     videoCapture.release();
00149 
00150     return devices;
00151 }
00152 
00153 Capture *CapturePluginHighgui::createCapture(const CaptureDevice captureDevice)
00154 {
00155     return new CaptureHighgui(captureDevice);
00156 }
00157 
00158 void registerPlugin(const std::string &captureType, alvar::CapturePlugin *&capturePlugin)
00159 {
00160     capturePlugin = new CapturePluginHighgui(captureType);
00161 }
00162 
00163 } // namespace plugins
00164 } // namespace alvar


ar_track_alvar
Author(s): Scott Niekum
autogenerated on Sat Dec 28 2013 16:46:15