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Open Source Computer Vision Library https://opencv.org/
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opencv/modules/videoio/src/cap.cpp

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/*M///////////////////////////////////////////////////////////////////////////////////////
//
// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
//
// 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.
//
//
// Intel License Agreement
// For Open Source Computer Vision Library
//
// Copyright (C) 2000, Intel Corporation, all rights reserved.
// Third party copyrights are property of their respective owners.
//
// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:
//
// * Redistribution's of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// * Redistribution's in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// * The name of Intel Corporation may not be used to endorse or promote products
// derived from this software without specific prior written permission.
//
// This software is provided by the copyright holders and contributors "as is" and
// any express or implied warranties, including, but not limited to, the implied
// warranties of merchantability and fitness for a particular purpose are disclaimed.
// In no event shall the Intel Corporation or contributors be liable for any direct,
// indirect, incidental, special, exemplary, or consequential damages
// (including, but not limited to, procurement of substitute goods or services;
// loss of use, data, or profits; or business interruption) however caused
// and on any theory of liability, whether in contract, strict liability,
// or tort (including negligence or otherwise) arising in any way out of
// the use of this software, even if advised of the possibility of such damage.
//
//M*/
#include "precomp.hpp"
#include "cap_intelperc.hpp"
#include "cap_dshow.hpp"
#if defined _M_X64 && defined _MSC_VER && !defined CV_ICC
#pragma optimize("",off)
#pragma warning(disable: 4748)
#endif
namespace cv
{
template<> void DefaultDeleter<CvCapture>::operator ()(CvCapture* obj) const
{ cvReleaseCapture(&obj); }
template<> void DefaultDeleter<CvVideoWriter>::operator ()(CvVideoWriter* obj) const
{ cvReleaseVideoWriter(&obj); }
}
/************************* Reading AVIs & Camera data **************************/
static inline double icvGetCaptureProperty( const CvCapture* capture, int id )
{
return capture ? capture->getProperty(id) : 0;
}
CV_IMPL void cvReleaseCapture( CvCapture** pcapture )
{
if( pcapture && *pcapture )
{
delete *pcapture;
*pcapture = 0;
}
}
CV_IMPL IplImage* cvQueryFrame( CvCapture* capture )
{
if(!capture)
return 0;
if(!capture->grabFrame())
return 0;
return capture->retrieveFrame(0);
}
CV_IMPL int cvGrabFrame( CvCapture* capture )
{
return capture ? capture->grabFrame() : 0;
}
CV_IMPL IplImage* cvRetrieveFrame( CvCapture* capture, int idx )
{
return capture ? capture->retrieveFrame(idx) : 0;
}
CV_IMPL double cvGetCaptureProperty( CvCapture* capture, int id )
{
return icvGetCaptureProperty(capture, id);
}
CV_IMPL int cvSetCaptureProperty( CvCapture* capture, int id, double value )
{
return capture ? capture->setProperty(id, value) : 0;
}
CV_IMPL int cvGetCaptureDomain( CvCapture* capture)
{
return capture ? capture->getCaptureDomain() : 0;
}
/**
* Camera dispatching method: index is the camera number.
* If given an index from 0 to 99, it tries to find the first
* API that can access a given camera index.
* Add multiples of 100 to select an API.
*/
CV_IMPL CvCapture * cvCreateCameraCapture (int index)
{
int domains[] =
{
#ifdef HAVE_MSMF
CV_CAP_MSMF,
#endif
#if 1
CV_CAP_IEEE1394, // identical to CV_CAP_DC1394
#endif
#ifdef HAVE_TYZX
CV_CAP_STEREO,
#endif
#ifdef HAVE_PVAPI
CV_CAP_PVAPI,
#endif
#if 1
CV_CAP_VFW, // identical to CV_CAP_V4L
#endif
#ifdef HAVE_MIL
CV_CAP_MIL,
#endif
#if defined(HAVE_QUICKTIME) || defined(HAVE_QTKIT)
CV_CAP_QT,
#endif
#ifdef HAVE_UNICAP
CV_CAP_UNICAP,
#endif
#ifdef HAVE_OPENNI
CV_CAP_OPENNI,
#endif
#ifdef HAVE_OPENNI2
CV_CAP_OPENNI2,
#endif
#ifdef HAVE_ANDROID_NATIVE_CAMERA
CV_CAP_ANDROID,
#endif
#ifdef HAVE_XIMEA
CV_CAP_XIAPI,
#endif
#ifdef HAVE_AVFOUNDATION
CV_CAP_AVFOUNDATION,
#endif
#ifdef HAVE_GIGE_API
CV_CAP_GIGANETIX,
#endif
#ifdef HAVE_INTELPERC
CV_CAP_INTELPERC,
#endif
-1
};
// interpret preferred interface (0 = autodetect)
int pref = (index / 100) * 100;
if (pref)
{
domains[0]=pref;
index %= 100;
domains[1]=-1;
}
// try every possibly installed camera API
for (int i = 0; domains[i] >= 0; i++)
{
#if defined(HAVE_MSMF) || \
defined(HAVE_TYZX) || \
defined(HAVE_VFW) || \
defined(HAVE_LIBV4L) || \
defined(HAVE_CAMV4L) || \
defined(HAVE_CAMV4L2) || \
defined(HAVE_VIDEOIO) || \
defined(HAVE_GSTREAMER) || \
defined(HAVE_DC1394_2) || \
defined(HAVE_DC1394) || \
defined(HAVE_CMU1394) || \
defined(HAVE_MIL) || \
defined(HAVE_QUICKTIME) || \
defined(HAVE_QTKIT) || \
defined(HAVE_UNICAP) || \
defined(HAVE_PVAPI) || \
defined(HAVE_OPENNI) || \
defined(HAVE_OPENNI2) || \
defined(HAVE_XIMEA) || \
defined(HAVE_AVFOUNDATION) || \
defined(HAVE_ANDROID_NATIVE_CAMERA) || \
defined(HAVE_GIGE_API) || \
defined(HAVE_INTELPERC) || \
(0)
// local variable to memorize the captured device
CvCapture *capture;
#endif
switch (domains[i])
{
#ifdef HAVE_MSMF
case CV_CAP_MSMF:
capture = cvCreateCameraCapture_MSMF (index);
if (capture)
return capture;
break;
#endif
#ifdef HAVE_TYZX
case CV_CAP_STEREO:
capture = cvCreateCameraCapture_TYZX (index);
if (capture)
return capture;
break;
#endif
case CV_CAP_VFW:
#ifdef HAVE_VFW
capture = cvCreateCameraCapture_VFW (index);
if (capture)
return capture;
#endif
#if defined HAVE_LIBV4L || defined HAVE_CAMV4L || defined HAVE_CAMV4L2 || defined HAVE_VIDEOIO
capture = cvCreateCameraCapture_V4L (index);
if (capture)
return capture;
#endif
#ifdef HAVE_GSTREAMER
capture = cvCreateCapture_GStreamer(CV_CAP_GSTREAMER_V4L2, 0);
if (capture)
return capture;
capture = cvCreateCapture_GStreamer(CV_CAP_GSTREAMER_V4L, 0);
if (capture)
return capture;
#endif
break; //CV_CAP_VFW
case CV_CAP_FIREWIRE:
#ifdef HAVE_DC1394_2
capture = cvCreateCameraCapture_DC1394_2 (index);
if (capture)
return capture;
#endif
#ifdef HAVE_DC1394
capture = cvCreateCameraCapture_DC1394 (index);
if (capture)
return capture;
#endif
#ifdef HAVE_CMU1394
capture = cvCreateCameraCapture_CMU (index);
if (capture)
return capture;
#endif
#if defined(HAVE_GSTREAMER) && 0
//Re-enable again when gstreamer 1394 support will land in the backend code
capture = cvCreateCapture_GStreamer(CV_CAP_GSTREAMER_1394, 0);
if (capture)
return capture;
#endif
break; //CV_CAP_FIREWIRE
#ifdef HAVE_MIL
case CV_CAP_MIL:
capture = cvCreateCameraCapture_MIL (index);
if (capture)
return capture;
break;
#endif
#if defined(HAVE_QUICKTIME) || defined(HAVE_QTKIT)
case CV_CAP_QT:
capture = cvCreateCameraCapture_QT (index);
if (capture)
return capture;
break;
#endif
#ifdef HAVE_UNICAP
case CV_CAP_UNICAP:
capture = cvCreateCameraCapture_Unicap (index);
if (capture)
return capture;
break;
#endif
#ifdef HAVE_PVAPI
case CV_CAP_PVAPI:
capture = cvCreateCameraCapture_PvAPI (index);
if (capture)
return capture;
break;
#endif
#ifdef HAVE_OPENNI
case CV_CAP_OPENNI:
capture = cvCreateCameraCapture_OpenNI (index);
if (capture)
return capture;
break;
#endif
#ifdef HAVE_OPENNI2
case CV_CAP_OPENNI2:
capture = cvCreateCameraCapture_OpenNI(index);
if (capture)
return capture;
break;
#endif
#ifdef HAVE_ANDROID_NATIVE_CAMERA
case CV_CAP_ANDROID:
capture = cvCreateCameraCapture_Android (index);
if (capture)
return capture;
break;
#endif
#ifdef HAVE_XIMEA
case CV_CAP_XIAPI:
capture = cvCreateCameraCapture_XIMEA (index);
if (capture)
return capture;
break;
#endif
#ifdef HAVE_AVFOUNDATION
case CV_CAP_AVFOUNDATION:
capture = cvCreateCameraCapture_AVFoundation (index);
if (capture)
return capture;
break;
#endif
#ifdef HAVE_GIGE_API
case CV_CAP_GIGANETIX:
capture = cvCreateCameraCapture_Giganetix (index);
if (capture)
return capture;
break; // CV_CAP_GIGANETIX
#endif
}
}
// failed open a camera
return 0;
}
/**
* Videoreader dispatching method: it tries to find the first
* API that can access a given filename.
*/
CV_IMPL CvCapture * cvCreateFileCapture (const char * filename)
{
CvCapture * result = 0;
#ifdef HAVE_FFMPEG
if (! result)
result = cvCreateFileCapture_FFMPEG_proxy (filename);
#endif
#ifdef HAVE_VFW
if (! result)
result = cvCreateFileCapture_VFW (filename);
#endif
#ifdef HAVE_MSMF
if (! result)
result = cvCreateFileCapture_MSMF (filename);
#endif
#ifdef HAVE_XINE
if (! result)
result = cvCreateFileCapture_XINE (filename);
#endif
#ifdef HAVE_GSTREAMER
if (! result)
result = cvCreateCapture_GStreamer (CV_CAP_GSTREAMER_FILE, filename);
#endif
#if defined(HAVE_QUICKTIME) || defined(HAVE_QTKIT)
if (! result)
result = cvCreateFileCapture_QT (filename);
#endif
#ifdef HAVE_AVFOUNDATION
if (! result)
result = cvCreateFileCapture_AVFoundation (filename);
#endif
#ifdef HAVE_OPENNI
if (! result)
result = cvCreateFileCapture_OpenNI (filename);
#endif
if (! result)
result = cvCreateFileCapture_Images (filename);
return result;
}
/**
* Videowriter dispatching method: it tries to find the first
* API that can write a given stream.
*/
CV_IMPL CvVideoWriter* cvCreateVideoWriter( const char* filename, int fourcc,
double fps, CvSize frameSize, int is_color )
{
//CV_FUNCNAME( "cvCreateVideoWriter" );
CvVideoWriter *result = 0;
if(!fourcc || !fps)
result = cvCreateVideoWriter_Images(filename);
#ifdef HAVE_FFMPEG
if(!result)
result = cvCreateVideoWriter_FFMPEG_proxy (filename, fourcc, fps, frameSize, is_color);
#endif
#ifdef HAVE_VFW
if(!result)
result = cvCreateVideoWriter_VFW(filename, fourcc, fps, frameSize, is_color);
#endif
#ifdef HAVE_MSMF
if (!result)
result = cvCreateVideoWriter_MSMF(filename, fourcc, fps, frameSize, is_color);
#endif
/* #ifdef HAVE_XINE
if(!result)
result = cvCreateVideoWriter_XINE(filename, fourcc, fps, frameSize, is_color);
#endif
*/
#ifdef HAVE_AVFOUNDATION
if (! result)
result = cvCreateVideoWriter_AVFoundation(filename, fourcc, fps, frameSize, is_color);
#endif
#if defined(HAVE_QUICKTIME) || defined(HAVE_QTKIT)
if(!result)
result = cvCreateVideoWriter_QT(filename, fourcc, fps, frameSize, is_color);
#endif
#ifdef HAVE_GSTREAMER
if (! result)
result = cvCreateVideoWriter_GStreamer(filename, fourcc, fps, frameSize, is_color);
#endif
#if !defined(HAVE_FFMPEG) && \
!defined(HAVE_VFW) && \
!defined(HAVE_MSMF) && \
!defined(HAVE_AVFOUNDATION) && \
!defined(HAVE_QUICKTIME) && \
!defined(HAVE_QTKIT) && \
!defined(HAVE_GSTREAMER)
// If none of the writers is used
// these statements suppress 'unused parameter' warnings.
(void)frameSize;
(void)is_color;
#endif
if(!result)
result = cvCreateVideoWriter_Images(filename);
return result;
}
CV_IMPL int cvWriteFrame( CvVideoWriter* writer, const IplImage* image )
{
return writer ? writer->writeFrame(image) : 0;
}
CV_IMPL void cvReleaseVideoWriter( CvVideoWriter** pwriter )
{
if( pwriter && *pwriter )
{
delete *pwriter;
*pwriter = 0;
}
}
namespace cv
{
VideoCapture::VideoCapture()
{}
VideoCapture::VideoCapture(const String& filename)
{
open(filename);
}
VideoCapture::VideoCapture(int device)
{
open(device);
}
VideoCapture::~VideoCapture()
{
icap.release();
cap.release();
}
bool VideoCapture::open(const String& filename)
{
if (isOpened()) release();
cap.reset(cvCreateFileCapture(filename.c_str()));
return isOpened();
}
bool VideoCapture::open(int device)
{
if (isOpened()) release();
icap = createCameraCapture(device);
if (!icap.empty())
return true;
cap.reset(cvCreateCameraCapture(device));
return isOpened();
}
bool VideoCapture::isOpened() const
{
return (!cap.empty() || !icap.empty());
}
void VideoCapture::release()
{
icap.release();
cap.release();
}
bool VideoCapture::grab()
{
if (!icap.empty())
return icap->grabFrame();
return cvGrabFrame(cap) != 0;
}
bool VideoCapture::retrieve(OutputArray image, int channel)
{
if (!icap.empty())
return icap->retrieveFrame(channel, image);
IplImage* _img = cvRetrieveFrame(cap, channel);
if( !_img )
{
image.release();
return false;
}
if(_img->origin == IPL_ORIGIN_TL)
cv::cvarrToMat(_img).copyTo(image);
else
{
Mat temp = cv::cvarrToMat(_img);
flip(temp, image, 0);
}
return true;
}
bool VideoCapture::read(OutputArray image)
{
if(grab())
retrieve(image);
else
image.release();
return !image.empty();
}
VideoCapture& VideoCapture::operator >> (Mat& image)
{
read(image);
return *this;
}
VideoCapture& VideoCapture::operator >> (UMat& image)
{
read(image);
return *this;
}
bool VideoCapture::set(int propId, double value)
{
if (!icap.empty())
return icap->setProperty(propId, value);
return cvSetCaptureProperty(cap, propId, value) != 0;
}
double VideoCapture::get(int propId) const
{
if (!icap.empty())
return icap->getProperty(propId);
return icvGetCaptureProperty(cap, propId);
}
Ptr<IVideoCapture> VideoCapture::createCameraCapture(int index)
{
int domains[] =
{
#ifdef HAVE_DSHOW
CV_CAP_DSHOW,
#endif
#ifdef HAVE_INTELPERC
CV_CAP_INTELPERC,
#endif
-1, -1
};
// interpret preferred interface (0 = autodetect)
int pref = (index / 100) * 100;
if (pref)
{
domains[0]=pref;
index %= 100;
domains[1]=-1;
}
// try every possibly installed camera API
for (int i = 0; domains[i] >= 0; i++)
{
#if defined(HAVE_DSHOW) || \
defined(HAVE_INTELPERC) || \
(0)
Ptr<IVideoCapture> capture;
switch (domains[i])
{
#ifdef HAVE_DSHOW
case CV_CAP_DSHOW:
capture = makePtr<VideoCapture_DShow>(index);
if (capture && capture.dynamicCast<VideoCapture_DShow>()->isOpened())
return capture;
break; // CV_CAP_DSHOW
#endif
#ifdef HAVE_INTELPERC
case CV_CAP_INTELPERC:
capture = makePtr<VideoCapture_IntelPerC>();
if (capture && capture.dynamicCast<VideoCapture_IntelPerC>()->isOpened())
return capture;
break; // CV_CAP_INTEL_PERC
#endif
}
#endif
}
// failed open a camera
return Ptr<IVideoCapture>();
}
VideoWriter::VideoWriter()
{}
VideoWriter::VideoWriter(const String& filename, int _fourcc, double fps, Size frameSize, bool isColor)
{
open(filename, _fourcc, fps, frameSize, isColor);
}
void VideoWriter::release()
{
writer.release();
}
VideoWriter::~VideoWriter()
{
release();
}
bool VideoWriter::open(const String& filename, int _fourcc, double fps, Size frameSize, bool isColor)
{
writer.reset(cvCreateVideoWriter(filename.c_str(), _fourcc, fps, frameSize, isColor));
return isOpened();
}
bool VideoWriter::isOpened() const
{
return !writer.empty();
}
void VideoWriter::write(const Mat& image)
{
IplImage _img = image;
cvWriteFrame(writer, &_img);
}
VideoWriter& VideoWriter::operator << (const Mat& image)
{
write(image);
return *this;
}
int VideoWriter::fourcc(char c1, char c2, char c3, char c4)
{
return (c1 & 255) + ((c2 & 255) << 8) + ((c3 & 255) << 16) + ((c4 & 255) << 24);
}
}