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#include "video-widget.hpp"
#include "compat/check-visible.hpp"
#include "compat/math.hpp"
#include <cstddef>
#include <cstring>
#ifdef OTR_VIDEO_HAS_OPENCV
# include <opencv2/imgproc.hpp>
#endif
#include <QPainter>
void cv_video_widget::init_image_nolock()
{
texture = QImage(W, H, QImage::Format_ARGB32);
texture.setDevicePixelRatio(devicePixelRatioF());
}
cv_video_widget::cv_video_widget(QWidget* parent) : QWidget(parent)
{
W = width(); H = height();
init_image_nolock(); texture.fill(Qt::gray);
connect(&timer, &QTimer::timeout, this, &cv_video_widget::update_and_repaint, Qt::DirectConnection);
timer.start(65);
}
#ifdef OTR_VIDEO_HAS_OPENCV
void cv_video_widget::update_image(const cv::Mat& frame)
{
QMutexLocker l(&mtx);
if (freshp)
return;
if (W < 1 || H < 1 || frame.rows < 1 || frame.cols < 1)
return;
cv::Mat const* __restrict frame_scaled = nullptr;
if (frame3.cols != W || frame3.rows != H)
{
frame3 = cv::Mat(H, W, frame.type());
frame2 = cv::Mat(H, W, CV_8UC4);
if (!frame2.isContinuous() || !frame3.isContinuous())
std::abort();
}
if (frame.cols != W || frame.rows != H)
{
cv::resize(frame, frame3, { W, H }, 0, 0, cv::INTER_NEAREST);
frame_scaled = &frame3;
}
else if (!frame.isContinuous())
{
frame.copyTo(frame3);
frame_scaled = &frame3;
}
else
frame_scaled = &frame;
freshp = true;
int color_cvt = 0;
constexpr int nchannels = 4;
switch (frame_scaled->channels())
{
case 1:
color_cvt = cv::COLOR_GRAY2BGRA;
break;
case 3:
color_cvt = cv::COLOR_BGR2BGRA;
break;
case nchannels:
break;
default:
unreachable();
break;
}
cv::Mat const* frame_color;
if (color_cvt != cv::COLOR_COLORCVT_MAX)
{
cv::cvtColor(*frame_scaled, frame2, color_cvt);
frame_color = &frame2;
}
else
frame_color = frame_scaled;
int stride = frame_color->step.p[0], rows = frame_color->rows;
int nbytes = rows * stride;
vec.resize(nbytes); vec.shrink_to_fit();
std::memcpy(vec.data(), frame_color->data, nbytes);
texture = QImage((const unsigned char*) vec.data(), W, H, stride, QImage::Format_ARGB32);
texture.setDevicePixelRatio(devicePixelRatioF());
}
#endif
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);
if (texture.width() != W || texture.height() != H)
{
init_image_nolock();
texture.fill(Qt::gray);
}
QPainter painter(this);
painter.drawImage(rect(), texture);
}
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);
double dpr = devicePixelRatioF();
W = iround(width() * dpr);
H = iround(height() * dpr);
init_image_nolock();
}
void cv_video_widget::get_preview_size(int& w, int& h)
{
QMutexLocker l(&mtx);
w = W; h = H;
}
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