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capturethread.cpp
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/***************************************************************************
* Copyright (C) 2008, 2009, 2010 by Stephane List *
* slist@lilotux.net *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#include "capturethread.h"
#include "formatconverter.h"
#include <QDebug>
#include <QTime>
CaptureThread::CaptureThread(QObject *parent)
: QThread(parent),
abort_(false),
capture_(0),
fps_limit_(25)
{
qDebug() << "CaptureThread::CaptureThread";
capture_ = cvCaptureFromCAM(0);
if (!capture_)
{
qWarning("No webcam");
emit webcamError(tr("No webcam"));
return;
}
cvGrabFrame(capture_);
}
CaptureThread::~CaptureThread()
{
qDebug() << "CaptureThread::~CaptureThread";
abort_ = true;
if (!wait(1000)) // The thread has 1 second to finish
{
qDebug() << "thread takes more than 1 second to finish, use the force !";
}
if (capture_)
{
cvReleaseCapture(&capture_);
}
}
void CaptureThread::run()
{
qDebug() << "CaptureThread::run";
while (!abort_)
{
capture();
}
}
void CaptureThread::capture()
{
if ( !capture_ )
{
qDebug() << "capture_ not initialised";
emit webcamError(tr("No webcam"));
return;
}
//qDebug() << "recording a frame - " << QTime::currentTime();
image_ = cvQueryFrame(capture_);
emit output(*image_);
msleep(1000/fps_limit_);
}
void CaptureThread::set_fps_limit(int limit)
{
qDebug() << "Limit fps to : " << limit;
fps_limit_ = limit;
}