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qTox/src/video/videomode.cpp

84 lines
2.4 KiB
C++

/*
Copyright © 2015-2018 by The qTox Project Contributors
This file is part of qTox, a Qt-based graphical interface for Tox.
qTox is libre software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
qTox is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with qTox. If not, see <http://www.gnu.org/licenses/>.
*/
#include "videomode.h"
/**
* @struct VideoMode
* @brief Describes a video mode supported by a device.
*
* @var unsigned short VideoMode::width, VideoMode::height
* @brief Displayed video resolution (NOT frame resolution).
*
* @var unsigned short VideoMode::x, VideoMode::y
* @brief Coordinates of upper-left corner.
*
* @var float VideoMode::FPS
* @brief Frames per second supported by the device at this resolution
* @note a value < 0 indicates an invalid value
*/
VideoMode::VideoMode(int width, int height, int x, int y, float FPS)
: width(width)
, height(height)
, x(x)
, y(y)
, FPS(FPS)
{
}
VideoMode::VideoMode(QRect rect)
: width(rect.width())
, height(rect.height())
, x(rect.x())
, y(rect.y())
{
}
QRect VideoMode::toRect() const
{
return QRect(x, y, width, height);
}
bool VideoMode::operator==(const VideoMode& other) const
{
return width == other.width && height == other.height && x == other.x && y == other.y
&& qFuzzyCompare(FPS, other.FPS) && pixel_format == other.pixel_format;
}
uint32_t VideoMode::norm(const VideoMode& other) const
{
return qAbs(this->width - other.width) + qAbs(this->height - other.height);
}
uint32_t VideoMode::tolerance() const
{
constexpr uint32_t minTolerance = 300; // keep wider tolerance for low res cameras
constexpr uint32_t toleranceFactor = 10; // video mode must be within 10% to be "close enough" to ideal
return std::max((width + height)/toleranceFactor, minTolerance);
}
/**
* @brief All zeros means a default/unspecified mode
*/
VideoMode::operator bool() const
{
return width || height || static_cast<int>(FPS);
}