// Copyright (c) 2014-2019, The Monero Project
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification, are
// permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this list of
//    conditions and the following disclaimer.
//
// 2. Redistributions 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.
//
// 3. Neither the name of the copyright holder nor the names of its contributors may 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 COPYRIGHT HOLDER 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.

#include "QrCodeScanner.h"
#include <QVideoProbe>
#include <QCamera>

QrCodeScanner::QrCodeScanner(QObject *parent)
    : QObject(parent)
    , m_processTimerId(-1)
    , m_processInterval(750)
    , m_enabled(true)
{
    m_probe = new QVideoProbe(this);
    m_thread = new QrScanThread(this);
    m_thread->start();
    QObject::connect(m_thread, SIGNAL(decoded(QString)), this, SIGNAL(decoded(QString)));
    QObject::connect(m_thread, SIGNAL(notifyError(const QString &, bool)), this, SIGNAL(notifyError(const QString &, bool)));
    connect(m_probe, SIGNAL(videoFrameProbed(QVideoFrame)), this, SLOT(processFrame(QVideoFrame)));
}
void QrCodeScanner::setSource(QCamera *camera)
{
    m_probe->setSource(camera);
}
void QrCodeScanner::processFrame(QVideoFrame frame)
{
    if(frame.isValid()){
        m_curFrame = frame;
    }
}
bool QrCodeScanner::enabled() const
{
    return m_enabled;
}
void QrCodeScanner::setEnabled(bool enabled)
{
    m_enabled = enabled;
    if(!enabled && (m_processTimerId != -1) )
    {
        this->killTimer(m_processTimerId);
        m_processTimerId = -1;
    }
    else if (enabled && (m_processTimerId == -1) )
    {
        m_processTimerId = this->startTimer(m_processInterval);
    }
    emit enabledChanged();
}
void QrCodeScanner::timerEvent(QTimerEvent *event)
{
    if( (event->timerId() == m_processTimerId) ){
        m_thread->addFrame(m_curFrame);
    }
}

QrCodeScanner::~QrCodeScanner()
{
    m_thread->stop();
    m_thread->quit();
    if(!m_thread->wait(5000))
    {
        m_thread->terminate();
        m_thread->wait();
    }

}