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/* Copyright (c) 2012 Patrick Ruoff
* Copyright (c) 2014-2016 Stanislaw Halik <sthalik@misaki.pl>
*
* 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.
*/
// XXX TODO remove hard opencv dependency -sh 20190210
#include "video-widget.hpp"
#include "compat/check-visible.hpp"
#include "compat/math.hpp"
#include <cstddef>
#include <cstring>
#include <opencv2/imgproc.hpp>
cv_video_widget::cv_video_widget(QWidget* parent) : QWidget(parent)
{
texture = QImage(width(), height(), QImage::Format_ARGB32);
texture.fill(Qt::gray);
texture.setDevicePixelRatio(devicePixelRatioF());
connect(&timer, SIGNAL(timeout()), this, SLOT(update_and_repaint()), Qt::DirectConnection);
timer.start(65);
}
void cv_video_widget::update_image(const cv::Mat& frame)
{
QMutexLocker l(&mtx);
if (texture.width() != W || texture.height() != H)
{
frame2 = cv::Mat();
frame3 = cv::Mat();
}
if (!freshp)
{
if (W < 1 || H < 1 || frame.rows < 1 || frame.cols < 1)
return;
freshp = true;
if (frame2.cols != frame.cols || frame2.rows != frame.rows)
frame2 = cv::Mat(frame.rows, frame.cols, CV_8UC4);
if (frame3.cols != W || frame3.rows != H)
frame3 = cv::Mat(H, W, CV_8UC4);
const cv::Mat* argb = &frame2;
switch (frame.channels())
{
case 1:
cv::cvtColor(frame, frame2, cv::COLOR_GRAY2BGRA);
break;
case 3:
cv::cvtColor(frame, frame2, cv::COLOR_BGR2BGRA);
break;
case 4:
argb = &frame;
break;
default:
unreachable();
}
const cv::Mat* img;
if (argb->cols != W || argb->rows != H)
{
cv::resize(*argb, frame3, cv::Size(W, H), 0, 0, cv::INTER_NEAREST);
img = &frame3;
}
else
img = argb;
int stride = (int)img->step.p[0];
if (stride < img->cols)
std::abort();
unsigned nbytes = (unsigned)(4 * img->rows * stride);
vec.resize(nbytes); vec.shrink_to_fit();
std::memcpy(vec.data(), img->data, nbytes);
texture = QImage((const unsigned char*) vec.data(), W, H, stride, QImage::Format_ARGB32);
texture.setDevicePixelRatio(devicePixelRatioF());
}
}
void cv_video_widget::update_image(const QImage& img)
{
QMutexLocker l(&mtx);
if (freshp)
return;
freshp = true;
unsigned nbytes = unsigned(img.bytesPerLine() * img.height());
vec.resize(nbytes); vec.shrink_to_fit();
std::memcpy(vec.data(), img.constBits(), nbytes);
texture = QImage((const unsigned char*) vec.data(), img.width(), img.height(), img.bytesPerLine(), img.format());
texture.setDevicePixelRatio(devicePixelRatioF());
}
void cv_video_widget::paintEvent(QPaintEvent*)
{
QMutexLocker foo(&mtx);
QPainter painter(this);
double dpr = devicePixelRatioF();
W = iround(width() * dpr);
H = iround(height() * dpr);
painter.drawImage(rect(), texture);
if (texture.width() != W || texture.height() != H)
{
texture = QImage(W, H, QImage::Format_ARGB32);
texture.fill(Qt::gray);
texture.setDevicePixelRatio(dpr);
}
}
void cv_video_widget::update_and_repaint()
{
if (!check_is_visible())
return;
QMutexLocker l(&mtx);
if (freshp)
{
freshp = false;
repaint();
}
}
void cv_video_widget::resizeEvent(QResizeEvent*)
{
QMutexLocker l(&mtx);
W = iround(width() * devicePixelRatioF());
H = iround(height() * devicePixelRatioF());
}
void cv_video_widget::get_preview_size(int& w, int& h)
{
QMutexLocker l(&mtx);
w = W; h = H;
}
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