142 lines
4.4 KiB
C++
142 lines
4.4 KiB
C++
/*
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* Kaidan - A user-friendly XMPP client for every device!
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*
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* Copyright (C) 2016-2021 Kaidan developers and contributors
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* (see the LICENSE file for a full list of copyright authors)
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*
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* Kaidan is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* In addition, as a special exception, the author of Kaidan gives
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* permission to link the code of its release with the OpenSSL
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* project's "OpenSSL" library (or with modified versions of it that
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* use the same license as the "OpenSSL" library), and distribute the
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* linked executables. You must obey the GNU General Public License in
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* all respects for all of the code used other than "OpenSSL". If you
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* modify this file, you may extend this exception to your version of
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* the file, but you are not obligated to do so. If you do not wish to
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* do so, delete this exception statement from your version.
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*
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* Kaidan is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Kaidan. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "QrCodeScannerFilter.h"
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#include <QDebug>
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#include <QCamera>
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#include <QCameraViewfinderSettings>
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#include <QtConcurrent/QtConcurrent>
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QrCodeScannerFilter::QrCodeScannerFilter(QObject *parent)
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: QAbstractVideoFilter(parent),
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m_decoder(new QrCodeDecoder(this))
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{
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connect(m_decoder, &QrCodeDecoder::decodingFailed,
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this, &QrCodeScannerFilter::scanningFailed);
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connect(m_decoder, &QrCodeDecoder::decodingSucceeded,
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this, &QrCodeScannerFilter::scanningSucceeded);
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}
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QrCodeScannerFilter::~QrCodeScannerFilter()
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{
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if (!m_processThread.isFinished()) {
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m_processThread.cancel();
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m_processThread.waitForFinished();
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}
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}
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QrCodeDecoder *QrCodeScannerFilter::decoder()
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{
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return m_decoder;
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}
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QVideoFilterRunnable *QrCodeScannerFilter::createFilterRunnable()
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{
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return new QrCodeScannerFilterRunnable(this);
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}
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void QrCodeScannerFilter::setCameraDefaultVideoFormat(QObject *qmlCamera)
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{
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QCamera *camera = qvariant_cast<QCamera*>(qmlCamera->property("mediaObject"));
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if (camera) {
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QCameraViewfinderSettings settings = camera->viewfinderSettings();
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settings.setPixelFormat(QVideoFrame::Format_RGB24);
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camera->setViewfinderSettings(settings);
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} else {
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qWarning() << "Could not set pixel format of QML camera";
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}
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}
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QrCodeScannerFilterRunnable::QrCodeScannerFilterRunnable(QrCodeScannerFilter *filter)
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: QObject(nullptr),
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m_filter(filter)
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{
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}
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QVideoFrame QrCodeScannerFilterRunnable::run(
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QVideoFrame *input,
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const QVideoSurfaceFormat &,
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RunFlags
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) {
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// Only one frame is processed at a time.
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if (input == nullptr
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|| !input->isValid()
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|| !m_filter->m_processThread.isFinished()) {
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return *input;
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}
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// Copy the data to be filtered.
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m_filter->m_frame.setData(*input);
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// Run a separate thread for processing the data.
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m_filter->m_processThread = QtConcurrent::run(
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this,
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&QrCodeScannerFilterRunnable::processVideoFrameProbed,
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m_filter->m_frame,
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m_filter
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);
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return *input;
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}
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void QrCodeScannerFilterRunnable::processVideoFrameProbed(
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QrCodeVideoFrame videoFrame,
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QrCodeScannerFilter *filter
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) {
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// Return if the frame is empty.
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if (videoFrame.data().isEmpty())
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return;
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// Create an image from the frame.
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const QImage *image = videoFrame.toGrayscaleImage();
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// Return if conversion from the frame to the image failed.
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if (image->isNull()) {
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// dirty hack: write QVideoFrame::PixelFormat as string to format using QDebug
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// QMetaEnum::valueToKey() did not work
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QString format;
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QDebug(&format).nospace() << videoFrame.pixelFormat();
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qDebug() << "QrCodeScannerFilterRunnable error: Cannot create image file to process.";
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qDebug() << "Maybe it was a format conversion problem.";
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qDebug() << "VideoFrame format:" << format;
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qDebug() << "Image corresponding format:"
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<< QVideoFrame::imageFormatFromPixelFormat(videoFrame.pixelFormat());
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emit filter->unsupportedFormatReceived(format);
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return;
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}
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// Decode the image.
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m_filter->decoder()->decodeImage(*image);
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delete image;
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}
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