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QR code feature beta and streamer mode

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dsc
2021-04-14 22:00:25 +02:00
parent 5bb95053fb
commit 13331ee5e7
29 changed files with 1143 additions and 31 deletions
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src/QR-Code-scanner/CMakeLists.txt
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add_library(qrdecoder STATIC
Decoder.cpp
)
target_link_libraries(qrdecoder
PUBLIC
Qt5::Gui
PNG::PNG
PRIVATE
quirc
)
if(WITH_SCANNER)
add_library(qrscanner
QrCodeScanner.cpp
QrScanThread.cpp
)
target_link_libraries(qrscanner
PUBLIC
Qt5::Multimedia
qrdecoder
)
endif()
src/QR-Code-scanner/Decoder.cpp
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// Copyright (c) 2020, 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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <limits>
#include <QDebug>
#include <QString>
#include "Decoder.h"
#include "quirc.h"
QrDecoder::QrDecoder()
: m_qr(quirc_new())
{
if (m_qr == nullptr)
{
throw std::runtime_error("QUIRC: failed to allocate memory");
}
}
QrDecoder::~QrDecoder()
{
quirc_destroy(m_qr);
}
std::vector<std::string> QrDecoder::decode(const QImage &image)
{
if (image.format() == QImage::Format_Grayscale8)
{
return decodeGrayscale8(image);
}
return decodeGrayscale8(image.convertToFormat(QImage::Format_Grayscale8));
}
std::vector<std::string> QrDecoder::decodePNG(QString pngPath) {
struct quirc *q;
std::vector<std::string> result;
auto pngPathStd = pngPath.toStdString();
auto pngPathCstr = pngPathStd.c_str();
q = quirc_new();
if (!q) {
qWarning() << "can't create quirc object";
return result;
}
int status = -1;
if (check_if_png(pngPathCstr)) {
status = load_png(q, pngPathCstr);
} else {
qWarning() << QString("Image is not a PNG: %1").arg(pngPath);
return result;
}
if (status < 0) {
quirc_destroy(q);
return result;
}
quirc_end(q);
auto count = quirc_count(q);
result.reserve(static_cast<size_t>(count));
for (int index = 0; index < count; ++index)
{
quirc_code code;
quirc_extract(q, index, &code);
quirc_data data;
const quirc_decode_error_t err = quirc_decode(&code, &data);
if (err == QUIRC_SUCCESS)
{
result.emplace_back(&data.payload[0], &data.payload[data.payload_len]);
}
}
quirc_destroy(q);
return result;
}
// I can't seem to get this function to work, we'll use dgbutil.h instead
std::vector<std::string> QrDecoder::decodeGrayscale8(const QImage &image)
{
if (quirc_resize(m_qr, image.width(), image.height()) < 0)
{
throw std::runtime_error("QUIRC: failed to allocate video memory");
}
uint8_t *rawImage = quirc_begin(m_qr, nullptr, nullptr);
if (rawImage == nullptr)
{
throw std::runtime_error("QUIRC: failed to get image buffer");
}
#if QT_VERSION >= QT_VERSION_CHECK(5, 10, 0)
std::copy(image.constBits(), image.constBits() + image.sizeInBytes(), rawImage);
#else
std::copy(image.constBits(), image.constBits() + image.byteCount(), rawImage);
#endif
quirc_end(m_qr);
const int count = quirc_count(m_qr);
if (count < 0)
{
throw std::runtime_error("QUIRC: failed to get the number of recognized QR-codes");
}
std::vector<std::string> result;
result.reserve(static_cast<size_t>(count));
for (int index = 0; index < count; ++index)
{
quirc_code code;
quirc_extract(m_qr, index, &code);
quirc_data data;
const quirc_decode_error_t err = quirc_decode(&code, &data);
if (err == QUIRC_SUCCESS)
{
result.emplace_back(&data.payload[0], &data.payload[data.payload_len]);
}
}
return result;
}
/* quirc -- QR-code recognition library
* Copyright (C) 2010-2012 Daniel Beer <dlbeer@gmail.com>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
static const char *data_type_str(int dt)
{
switch (dt) {
case QUIRC_DATA_TYPE_NUMERIC: return "NUMERIC";
case QUIRC_DATA_TYPE_ALPHA: return "ALPHA";
case QUIRC_DATA_TYPE_BYTE: return "BYTE";
case QUIRC_DATA_TYPE_KANJI: return "KANJI";
}
return "unknown";
}
void QrDecoder::dump_data(const struct quirc_data *data)
{
printf(" Version: %d\n", data->version);
printf(" ECC level: %c\n", "MLHQ"[data->ecc_level]);
printf(" Mask: %d\n", data->mask);
printf(" Data type: %d (%s)\n",
data->data_type, data_type_str(data->data_type));
printf(" Length: %d\n", data->payload_len);
printf(" Payload: %s\n", data->payload);
if (data->eci)
printf(" ECI: %d\n", data->eci);
}
void QrDecoder::dump_cells(const struct quirc_code *code)
{
int u, v;
printf(" %d cells, corners:", code->size);
for (u = 0; u < 4; u++)
printf(" (%d,%d)", code->corners[u].x,
code->corners[u].y);
printf("\n");
for (v = 0; v < code->size; v++) {
printf(" ");
for (u = 0; u < code->size; u++) {
int p = v * code->size + u;
if (code->cell_bitmap[p >> 3] & (1 << (p & 7)))
printf("[]");
else
printf(" ");
}
printf("\n");
}
}
/* hacked from https://dev.w3.org/Amaya/libpng/example.c
*
* Check if a file is a PNG image using png_sig_cmp(). Returns 1 if the given
* file is a PNG and 0 otherwise.
*/
#define PNG_BYTES_TO_CHECK 4
int QrDecoder::check_if_png(const char *filename)
{
int ret = 0;
FILE *infile = NULL;
unsigned char buf[PNG_BYTES_TO_CHECK];
/* Open the prospective PNG file. */
if ((infile = fopen(filename, "rb")) == NULL)
goto out;
/* Read in some of the signature bytes */
if (fread(buf, 1, PNG_BYTES_TO_CHECK, infile) != PNG_BYTES_TO_CHECK)
goto out;
/*
* Compare the first PNG_BYTES_TO_CHECK bytes of the signature.
* png_sig_cmp() returns zero if the image is a PNG and nonzero if it
* isn't a PNG.
*/
if (png_sig_cmp(buf, (png_size_t)0, PNG_BYTES_TO_CHECK) == 0)
ret = 1;
/* FALLTHROUGH */
out:
if (infile)
fclose(infile);
return (ret);
}
int QrDecoder::load_png(struct quirc *q, const char *filename)
{
int width, height, rowbytes, interlace_type, number_passes = 1;
png_uint_32 trns;
png_byte color_type, bit_depth;
png_structp png_ptr = NULL;
png_infop info_ptr = NULL;
FILE *infile = NULL;
uint8_t *image;
int ret = -1;
int pass;
if ((infile = fopen(filename, "rb")) == NULL)
goto out;
png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
if (!png_ptr)
goto out;
info_ptr = png_create_info_struct(png_ptr);
if (!info_ptr)
goto out;
if (setjmp(png_jmpbuf(png_ptr)))
goto out;
png_init_io(png_ptr, infile);
png_read_info(png_ptr, info_ptr);
color_type = png_get_color_type(png_ptr, info_ptr);
bit_depth = png_get_bit_depth(png_ptr, info_ptr);
interlace_type = png_get_interlace_type(png_ptr, info_ptr);
// Read any color_type into 8bit depth, Grayscale format.
// See http://www.libpng.org/pub/png/libpng-manual.txt
// PNG_COLOR_TYPE_GRAY_ALPHA is always 8 or 16bit depth.
if (color_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8)
png_set_expand_gray_1_2_4_to_8(png_ptr);
if ((trns = png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS)))
png_set_tRNS_to_alpha(png_ptr);
if (bit_depth == 16)
#if PNG_LIBPNG_VER >= 10504
png_set_scale_16(png_ptr);
#else
png_set_strip_16(png_ptr);
#endif
if ((trns) || color_type & PNG_COLOR_MASK_ALPHA)
png_set_strip_alpha(png_ptr);
if (color_type == PNG_COLOR_TYPE_PALETTE)
png_set_palette_to_rgb(png_ptr);
if (color_type == PNG_COLOR_TYPE_PALETTE ||
color_type == PNG_COLOR_TYPE_RGB ||
color_type == PNG_COLOR_TYPE_RGB_ALPHA) {
png_set_rgb_to_gray_fixed(png_ptr, 1, -1, -1);
}
if (interlace_type != PNG_INTERLACE_NONE)
number_passes = png_set_interlace_handling(png_ptr);
png_read_update_info(png_ptr, info_ptr);
width = png_get_image_width(png_ptr, info_ptr);
height = png_get_image_height(png_ptr, info_ptr);
rowbytes = png_get_rowbytes(png_ptr, info_ptr);
if (rowbytes != width) {
fprintf(stderr,
"load_png: expected rowbytes to be %u but got %u\n",
width, rowbytes);
goto out;
}
if (quirc_resize(q, width, height) < 0)
goto out;
image = quirc_begin(q, NULL, NULL);
for (pass = 0; pass < number_passes; pass++) {
int y;
for (y = 0; y < height; y++) {
png_bytep row_pointer = image + y * width;
png_read_rows(png_ptr, &row_pointer, NULL, 1);
}
}
png_read_end(png_ptr, info_ptr);
ret = 0;
/* FALLTHROUGH */
out:
/* cleanup */
if (png_ptr) {
if (info_ptr)
png_destroy_read_struct(&png_ptr, &info_ptr, (png_infopp)NULL);
else
png_destroy_read_struct(&png_ptr, (png_infopp)NULL, (png_infopp)NULL);
}
if (infile)
fclose(infile);
return (ret);
}
src/QR-Code-scanner/Decoder.h
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// Copyright (c) 2020, 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 <QImage>
#include <png.h>
struct quirc;
class QrDecoder
{
public:
QrDecoder(const QrDecoder &) = delete;
QrDecoder &operator=(const QrDecoder &) = delete;
QrDecoder();
~QrDecoder();
std::vector<std::string> decode(const QImage &image);
std::vector<std::string> decodePNG(QString pngPath);
private:
/* Dump decoded information on stdout. */
void dump_data(const struct quirc_data *data);
/* Dump a grid cell map on stdout. */
void dump_cells(const struct quirc_code *code);
/* Check if a file is a PNG image.
*
* returns 1 if the given file is a PNG and 0 otherwise.
*/
int check_if_png(const char *filename);
/* Read a PNG image into the decoder.
*
* Note that you must call quirc_end() if the function returns
* successfully (0).
*/
int load_png(struct quirc *q, const char *filename);
private:
std::vector<std::string> decodeGrayscale8(const QImage &image);
private:
quirc *m_qr;
};
src/QR-Code-scanner/QrCodeScanner.cpp
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// 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();
}
}
src/QR-Code-scanner/QrCodeScanner.h
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// 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.
#ifndef QRCODESCANNER_H_
#define QRCODESCANNER_H_
#include <QImage>
#include <QVideoFrame>
#include "QrScanThread.h"
class QVideoProbe;
class QCamera;
class QrCodeScanner : public QObject
{
Q_OBJECT
Q_PROPERTY(bool enabled READ enabled WRITE setEnabled NOTIFY enabledChanged)
public:
QrCodeScanner(QObject *parent = Q_NULLPTR);
~QrCodeScanner();
void setSource(QCamera*);
bool enabled() const;
void setEnabled(bool enabled);
public Q_SLOTS:
void processFrame(QVideoFrame);
Q_SIGNALS:
void enabledChanged();
void decoded(const QString &data);
void notifyError(const QString &error, bool warning = false);
protected:
void timerEvent(QTimerEvent *);
QrScanThread *m_thread;
int m_processTimerId;
int m_processInterval;
int m_enabled;
QVideoFrame m_curFrame;
QVideoProbe *m_probe;
};
#endif
src/QR-Code-scanner/QrScanThread.cpp
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// 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 "QrScanThread.h"
#include <QtGlobal>
#include <QDebug>
#if QT_VERSION < QT_VERSION_CHECK(5, 15, 0)
extern QImage qt_imageFromVideoFrame(const QVideoFrame &f);
#endif
QrScanThread::QrScanThread(QObject *parent)
: QThread(parent)
,m_running(true)
{
}
void QrScanThread::processQImage(const QImage &qimg)
{
try {
for (const std::string &code : m_decoder.decode(qimg))
{
emit decoded(QString::fromStdString(code));
}
}
catch(std::exception &e) {
qDebug() << "ERROR: " << e.what();
emit notifyError(e.what());
}
}
void QrScanThread::processVideoFrame(const QVideoFrame &frame)
{
#if QT_VERSION < QT_VERSION_CHECK(5, 15, 0)
processQImage( qt_imageFromVideoFrame(frame) );
#else
processQImage(frame.image());
#endif
}
void QrScanThread::stop()
{
m_running = false;
m_waitCondition.wakeOne();
}
void QrScanThread::addFrame(const QVideoFrame &frame)
{
QMutexLocker locker(&m_mutex);
m_queue.append(frame);
m_waitCondition.wakeOne();
}
void QrScanThread::run()
{
QVideoFrame frame;
while(m_running) {
QMutexLocker locker(&m_mutex);
while(m_queue.isEmpty() && m_running)
m_waitCondition.wait(&m_mutex);
if(!m_queue.isEmpty())
processVideoFrame(m_queue.takeFirst());
}
}
src/QR-Code-scanner/QrScanThread.h
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// 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.
#ifndef _QRSCANTHREAD_H_
#define _QRSCANTHREAD_H_
#include <QThread>
#include <QMutex>
#include <QWaitCondition>
#include <QEvent>
#include <QVideoFrame>
#include <QCamera>
#include "Decoder.h"
class QrScanThread : public QThread
{
Q_OBJECT
public:
QrScanThread(QObject *parent = Q_NULLPTR);
void addFrame(const QVideoFrame &frame);
virtual void stop();
Q_SIGNALS:
void decoded(const QString &data);
void notifyError(const QString &error, bool warning = false);
protected:
virtual void run();
void processVideoFrame(const QVideoFrame &);
void processQImage(const QImage &);
private:
QrDecoder m_decoder;
bool m_running;
QMutex m_mutex;
QWaitCondition m_waitCondition;
QList<QVideoFrame> m_queue;
};
#endif