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#include "impl.hpp"
#include "compat/sleep.hpp"
#include "video-property-page.hpp"
#include <QDebug>
namespace opencv_camera_impl {
cam::cam(int idx) : idx(idx)
{
}
cam::~cam()
{
stop();
}
void cam::stop()
{
if (cap)
{
if (cap->isOpened())
cap->release();
cap = std::nullopt;
}
mat = cv::Mat();
frame_ = { {}, false };
}
bool cam::is_open()
{
return !!cap;
}
void cam::set_exposure(bool write)
{
auto e = *s.exposure;
if (e != exposure)
switch (e)
{
case exposure_preset::near: cap->set(cv::CAP_PROP_EXPOSURE, -5); qDebug() << "near"; break;
case exposure_preset::far: cap->set(cv::CAP_PROP_EXPOSURE, -4); qDebug() << "far"; break;
default: break;
}
if (s.exposure != exposure_preset::ignored)
{
constexpr struct {
int prop, value;
} props[] = {
{ cv::CAP_PROP_AUTO_EXPOSURE, 0 },
{ cv::CAP_PROP_BRIGHTNESS, 0 },
{ cv::CAP_PROP_SHARPNESS, 3 },
{ cv::CAP_PROP_AUTO_EXPOSURE, 0 },
{ cv::CAP_PROP_BRIGHTNESS, 0 },
{ cv::CAP_PROP_SHARPNESS, 3 },
{ cv::CAP_PROP_CONTRAST, 32 },
{ cv::CAP_PROP_HUE, 0 },
{ cv::CAP_PROP_SATURATION, 0 },
{ cv::CAP_PROP_SHARPNESS, 3 },
{ cv::CAP_PROP_GAMMA, 100 },
{ cv::CAP_PROP_BACKLIGHT, 1 },
{ cv::CAP_PROP_GAIN, 0 },
};
for (const auto [prop, value] : props)
cap->set(prop, value);
}
if (write)
exposure = e;
}
bool cam::start(info& args)
{
stop();
cap.emplace(idx, video_capture_backend);
if (args.width > 0 && args.height > 0)
{
cap->set(cv::CAP_PROP_FRAME_WIDTH, args.width);
cap->set(cv::CAP_PROP_FRAME_HEIGHT, args.height);
}
if (args.fps > 0)
cap->set(cv::CAP_PROP_FPS, args.fps);
if (args.use_mjpeg)
cap->set(cv::CAP_PROP_FOURCC, cv::VideoWriter::fourcc('M', 'J', 'P', 'G'));
set_exposure(false);
if (!cap->isOpened())
goto fail;
if (!get_frame_())
goto fail;
return true;
fail:
stop();
return false;
}
bool cam::get_frame_()
{
if (!is_open())
return false;
for (unsigned i = 0; i < 10; i++)
{
if (cap->read(mat))
{
frame_.data = mat.data;
frame_.width = mat.cols;
frame_.height = mat.rows;
frame_.stride = mat.step.p[0];
if (mat.step.p[0] == (unsigned)frame_.width * mat.elemSize())
frame_.stride = cv::Mat::AUTO_STEP;
frame_.channels = mat.channels();
return true;
}
portable::sleep(50);
}
set_exposure(true);
return false;
}
std::tuple<const frame&, bool> cam::get_frame()
{
bool ret = get_frame_();
return { frame_, ret };
}
bool cam::show_dialog()
{
if (is_open())
return video_property_page::show_from_capture(*cap, idx);
else
return video_property_page::show(idx);
}
} // ns opencv_camera_impl
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