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switched video capture to QCamera and removed opencv dependency

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This commit is contained in:
csoler 2021-05-12 09:40:42 +02:00
parent 4b34c73cf8
commit 0de9c877b8
4 changed files with 98 additions and 104 deletions
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125
plugins/VOIP/gui/QVideoDevice.cpp
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@ -18,12 +18,13 @@
* *
*******************************************************************************/
#include <opencv2/opencv.hpp>
#include <opencv2/highgui.hpp>
#include <opencv2/imgproc/types_c.h>
#include <QTimer>
#include <QPainter>
#include <QImageReader>
#include <QBuffer>
#include <QCamera>
#include <QCameraInfo>
#include <QCameraImageCapture>
#include "QVideoDevice.h"
#include "VideoProcessor.h"
@ -36,6 +37,16 @@ QVideoInputDevice::QVideoInputDevice(QWidget *parent)
_echo_output_device = NULL ;
}
QVideoInputDevice::~QVideoInputDevice()
{
stop() ;
_video_processor = NULL ;
delete _image_capture;
delete _capture_device;
delete _timer;
}
bool QVideoInputDevice::stopped()
{
return _timer == NULL ;
@ -45,7 +56,7 @@ void QVideoInputDevice::stop()
{
if(_timer != NULL)
{
QObject::disconnect(_timer,SIGNAL(timeout()),this,SLOT(grabFrame())) ;
_capture_device->stop();
_timer->stop() ;
delete _timer ;
_timer = NULL ;
@ -53,10 +64,12 @@ void QVideoInputDevice::stop()
if(_capture_device != NULL)
{
// the camera will be deinitialized automatically in VideoCapture destructor
_capture_device->release();
delete _capture_device ;
delete _image_capture ;
delete _capture_device ;
_capture_device = NULL ;
}
_image_capture = NULL ;
}
}
void QVideoInputDevice::start()
{
@ -65,45 +78,78 @@ void QVideoInputDevice::start()
stop() ;
// Initialise la capture
static const int cam_id = 0 ;
_capture_device = new cv::VideoCapture(cam_id);
QCameraInfo caminfo = QCameraInfo::defaultCamera();
if(!_capture_device->isOpened())
{
std::cerr << "Cannot initialise camera. Something's wrong." << std::endl;
return ;
}
if(caminfo.isNull())
{
std::cerr << "No video camera available in this system!" << std::endl;
return ;
}
_capture_device = new QCamera(caminfo);
_timer = new QTimer ;
QObject::connect(_timer,SIGNAL(timeout()),this,SLOT(grabFrame())) ;
if(_capture_device->error() != QCamera::NoError)
{
emit cameraCaptureInfo(CANNOT_INITIALIZE_CAMERA,_capture_device->error());
std::cerr << "Cannot initialise camera. Something's wrong." << std::endl;
return;
}
_capture_device->setCaptureMode(QCamera::CaptureStillImage);
_timer->start(50) ; // 10 images per second.
if(_capture_device->error() == QCamera::NoError)
emit cameraCaptureInfo(CAMERA_IS_READY,QCamera::NoError);
_image_capture = new QCameraImageCapture(_capture_device);
if(!_image_capture->isCaptureDestinationSupported(QCameraImageCapture::CaptureToBuffer))
{
emit cameraCaptureInfo(CAMERA_IS_READY,QCamera::NoError);
delete _capture_device;
delete _image_capture;
return;
}
_image_capture->setCaptureDestination(QCameraImageCapture::CaptureToBuffer);
QObject::connect(_image_capture,SIGNAL(imageAvailable(int,QVideoFrame)),this,SLOT(grabFrame(int,QVideoFrame)));
QObject::connect(this,SIGNAL(cameraCaptureInfo(CameraStatus,QCamera::Error)),this,SLOT(errorHandling(CameraStatus,QCamera::Error)));
_timer = new QTimer ;
QObject::connect(_timer,SIGNAL(timeout()),_image_capture,SLOT(capture())) ;
_timer->start(50) ; // 10 images per second.
_capture_device->start();
}
void QVideoInputDevice::grabFrame()
void QVideoInputDevice::errorHandling(CameraStatus status,QCamera::Error error)
{
if(!_timer)
return ;
std::cerr << "Received msg from camera capture: status=" << (int)status << " error=" << (int)error << std::endl;
cv::Mat frame;
if(!_capture_device->read(frame))
if(status == CANNOT_INITIALIZE_CAMERA)
{
std::cerr << "(EE) Cannot capture image from camera. Something's wrong." << std::endl;
return ;
std::cerr << "Cannot initialize camera. Make sure to install package libqt5multimedia5-plugins, as this is a common cause for camera not being found." << std::endl;
}
}
void QVideoInputDevice::grabFrame(int id,QVideoFrame frame)
{
if(frame.size().isEmpty())
{
std::cerr << "Empty frame!" ;
return;
}
// get the image data
frame.map(QAbstractVideoBuffer::ReadOnly);
QByteArray data((const char *)frame.bits(), frame.mappedBytes());
QBuffer buffer;
buffer.setData(data);
buffer.open(QIODevice::ReadOnly);
QImageReader reader(&buffer, "JPG");
reader.setScaledSize(QSize(640,480));
QImage image(reader.read());
if(frame.channels() != 3)
{
std::cerr << "(EE) expected 3 channels. Got " << frame.channels() << std::endl;
return ;
}
// convert to RGB and copy to new buffer, because cvQueryFrame tells us to not modify the buffer
cv::Mat img_rgb;
cv::cvtColor(frame, img_rgb, CV_BGR2RGB);
QImage image = QImage(img_rgb.data,img_rgb.cols,img_rgb.rows,QImage::Format_RGB888);
std::cerr << "Frame " << id << ". Pixel format: " << frame.pixelFormat() << ". Size: " << image.size().width() << " x " << image.size().height() << std::endl; // if(frame.pixelFormat() != QVideoFrame::Format_Jpeg)
if(_video_processor != NULL)
{
@ -131,13 +177,6 @@ uint32_t QVideoInputDevice::currentBandwidth() const
return _video_processor->currentBandwidthOut() ;
}
QVideoInputDevice::~QVideoInputDevice()
{
stop() ;
_video_processor = NULL ;
}
QVideoOutputDevice::QVideoOutputDevice(QWidget *parent)
: QLabel(parent)
{