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/***
Olive - Non-Linear Video Editor
Copyright (C) 2019 Olive Team
This program is free 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.
This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
***/
#include "videoparams.h"
#include <QtMath>
#include "core.h"
OLIVE_NAMESPACE_ENTER
VideoParams::VideoParams() :
format_(PixelFormat::PIX_FMT_INVALID)
{
}
VideoParams::VideoParams(const int &width, const int &height, const PixelFormat::Format &format, const int& divider) :
width_(width),
height_(height),
format_(format),
divider_(divider)
{
calculate_effective_size();
}
VideoParams::VideoParams(const int &width, const int &height, const rational &time_base, const PixelFormat::Format &format, const int ÷r) :
width_(width),
height_(height),
time_base_(time_base),
format_(format),
divider_(divider)
{
calculate_effective_size();
}
int VideoParams::generate_auto_divider(qint64 width, qint64 height)
{
// Arbitrary pixel count (from 640x360)
const int target_res = 230400;
qint64 megapixels = width * height;
double squared_divider = double(megapixels) / double(target_res);
double divider = qSqrt(squared_divider);
QList<int> supported_dividers = Core::SupportedDividers();
if (divider <= supported_dividers.first()) {
return supported_dividers.first();
} else if (divider >= supported_dividers.last()) {
return supported_dividers.last();
} else {
for (int i=1; i<supported_dividers.size(); i++) {
int prev_divider = supported_dividers.at(i-1);
int next_divider = supported_dividers.at(i);
if (divider >= prev_divider && divider <= next_divider) {
double prev_diff = qAbs(prev_divider - divider);
double next_diff = qAbs(next_divider - divider);
if (prev_diff < next_diff) {
return prev_divider;
} else {
return next_divider;
}
}
}
// "Safe" fallback
return 2;
}
}
bool VideoParams::operator==(const VideoParams &rhs) const
{
return width() == rhs.width()
&& height() == rhs.height()
&& time_base() == rhs.time_base()
&& format() == rhs.format()
&& divider() == rhs.divider();
}
bool VideoParams::operator!=(const VideoParams &rhs) const
{
return !(*this == rhs);
}
void VideoParams::calculate_effective_size()
{
// Fast rounding up to an even number
effective_width_ = qCeil(width() / divider_ * 0.5) * 2;
effective_height_ = qCeil(height() / divider_ * 0.5) * 2;
}
bool VideoParams::is_valid() const
{
return (width() > 0
&& height() > 0
&& format_ != PixelFormat::PIX_FMT_INVALID
&& format_ != PixelFormat::PIX_FMT_COUNT);
}
OLIVE_NAMESPACE_EXIT
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