DShow camera as IVideoCapture object

modules/highgui/src/cap.cpp

@@ -41,6 +41,7 @@
 
 #include "precomp.hpp"
 #include "cap_intelperc.hpp"
+#include "cap_dshow.hpp"
 
 #if defined _M_X64 && defined _MSC_VER && !defined CV_ICC
 #pragma optimize("",off)
@@ -115,9 +116,6 @@ CV_IMPL CvCapture * cvCreateCameraCapture (int index)
 {
     int  domains[] =
     {
-#ifdef HAVE_DSHOW
-        CV_CAP_DSHOW,
-#endif
 #ifdef HAVE_MSMF
         CV_CAP_MSMF,
 #endif
@@ -175,8 +173,7 @@ CV_IMPL CvCapture * cvCreateCameraCapture (int index)
     // try every possibly installed camera API
     for (int i = 0; domains[i] >= 0; i++)
     {
-#if defined(HAVE_DSHOW)        || \
-    defined(HAVE_MSMF)         || \
+#if defined(HAVE_MSMF)         || \
     defined(HAVE_TYZX)         || \
     defined(HAVE_VFW)          || \
     defined(HAVE_LIBV4L)       || \
@@ -205,13 +202,6 @@ CV_IMPL CvCapture * cvCreateCameraCapture (int index)
 
         switch (domains[i])
         {
-#ifdef HAVE_DSHOW
-        case CV_CAP_DSHOW:
-             capture = cvCreateCameraCapture_DShow (index);
-             if (capture)
-                 return capture;
-            break;
-#endif
 #ifdef HAVE_MSMF
         case CV_CAP_MSMF:
              capture = cvCreateCameraCapture_MSMF (index);
@@ -589,6 +579,9 @@ Ptr<IVideoCapture> VideoCapture::createCameraCapture(int index)
 {
     int  domains[] =
     {
+#ifdef HAVE_DSHOW
+        CV_CAP_DSHOW,
+#endif
 #ifdef HAVE_INTELPERC
         CV_CAP_INTELPERC,
 #endif
@@ -607,18 +600,26 @@ Ptr<IVideoCapture> VideoCapture::createCameraCapture(int index)
     // try every possibly installed camera API
     for (int i = 0; domains[i] >= 0; i++)
     {
-#if defined(HAVE_INTELPERC)    || \
+#if defined(HAVE_DSHOW)        || \
+    defined(HAVE_INTELPERC)    || \
     (0)
         Ptr<IVideoCapture> capture;
 
         switch (domains[i])
         {
+#ifdef HAVE_DSHOW
+        case CV_CAP_DSHOW:
+            capture = Ptr<IVideoCapture>(new cv::VideoCapture_DShow(index));
+            if (capture)
+                return capture;
+            break; // CV_CAP_DSHOW
+#endif
 #ifdef HAVE_INTELPERC
         case CV_CAP_INTELPERC:
             capture = Ptr<IVideoCapture>(new cv::VideoCapture_IntelPerC());
             if (capture)
                 return capture;
-        break; // CV_CAP_INTEL_PERC
+            break; // CV_CAP_INTEL_PERC
 #endif
         }
 #endif
@@ -628,7 +629,6 @@ Ptr<IVideoCapture> VideoCapture::createCameraCapture(int index)
     return Ptr<IVideoCapture>();
 }
 
-
 VideoWriter::VideoWriter()
 {}
 

modules/highgui/src/cap_dshow.hpp

+/*M///////////////////////////////////////////////////////////////////////////////////////
+//
+// This file is part of OpenCV project.
+// It is subject to the license terms in the LICENSE file found in the top-level directory
+// of this distribution and at http://opencv.org/license.html.
+//
+// Copyright (C) 2014, Itseez, Inc., all rights reserved.
+// Third party copyrights are property of their respective owners.
+//
+//M*/
+
+#ifndef _CAP_DSHOW_HPP_
+#define _CAP_DSHOW_HPP_
+
+#include "precomp.hpp"
+
+#ifdef HAVE_DSHOW
+
+class videoInput;
+namespace cv
+{
+
+class VideoCapture_DShow : public IVideoCapture
+{
+public:
+    VideoCapture_DShow(int index);
+    virtual ~VideoCapture_DShow();
+
+    virtual double getProperty(int propIdx);
+    virtual bool setProperty(int propIdx, double propVal);
+
+    virtual bool grabFrame();
+    virtual bool retrieveFrame(int outputType, OutputArray frame);
+    virtual int getCaptureDomain();
+    bool isOpened() const;
+protected:
+    void open(int index);
+    void close();
+
+    int m_index, m_width, m_height, m_fourcc;
+    int m_widthSet, m_heightSet;
+    IplImage* m_frame;
+    static videoInput g_VI;
+};
+
+}
+
+#endif //HAVE_DSHOW
+#endif //_CAP_DSHOW_HPP_
\ No newline at end of file