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/* Copyright (c) 2019 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.
*/
#include "compat/sleep.hpp"
#include "video/camera.hpp"
#include "camera-names.hpp"
#include "video-property-page.hpp"
#include <optional>
#include <opencv2/core.hpp>
#include <opencv2/videoio.hpp>
using namespace video::impl;
struct cam;
struct metadata : camera_
{
metadata();
std::vector<QString> camera_names() const override;
std::unique_ptr<camera> make_camera(const QString& name) override;
bool can_show_dialog(const QString& camera_name) override;
bool show_dialog(const QString& camera_name) override;
};
struct cam final : camera
{
cam(int idx);
~cam() override;
bool start(const info& args) override;
void stop() override;
bool is_open() override;
std::tuple<const frame&, bool> get_frame() override;
bool show_dialog() override;
bool get_frame_();
std::optional<cv::VideoCapture> cap;
cv::Mat mat;
frame frame_;
int idx = -1;
};
metadata::metadata() = default;
std::unique_ptr<camera> metadata::make_camera(const QString& name)
{
int idx = camera_name_to_index(name);
if (idx != -1)
return std::make_unique<cam>(idx);
else
return nullptr;
}
std::vector<QString> metadata::camera_names() const
{
return get_camera_names();
}
bool metadata::can_show_dialog(const QString& camera_name)
{
return camera_name_to_index(camera_name) != -1;
}
bool metadata::show_dialog(const QString& camera_name)
{
int idx = camera_name_to_index(camera_name);
if (idx != -1)
{
video_property_page::show(idx);
return true;
}
else
return false;
}
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;
}
bool cam::start(const info& args)
{
stop();
cap.emplace(idx);
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 (!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];
frame_.channels = mat.channels();
return true;
}
portable::sleep(50);
}
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);
}
OTR_REGISTER_CAMERA(metadata)
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