284 lines
7.9 KiB
C++
284 lines
7.9 KiB
C++
/***
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Olive - Non-Linear Video Editor
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Copyright (C) 2019 Olive Team
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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***/
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#include "videoparams.h"
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#include <QtMath>
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#include "core.h"
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OLIVE_NAMESPACE_ENTER;
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const int VideoParams::kInternalChannelCount = kRGBAChannelCount;
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const rational VideoParams::kPixelAspectSquare(1);
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const rational VideoParams::kPixelAspectNTSCStandard(8, 9);
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const rational VideoParams::kPixelAspectNTSCWidescreen(32, 27);
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const rational VideoParams::kPixelAspectPALStandard(16, 15);
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const rational VideoParams::kPixelAspectPALWidescreen(64, 45);
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const rational VideoParams::kPixelAspect1080Anamorphic(4, 3);
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const QVector<rational> VideoParams::kSupportedFrameRates = {
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rational(10, 1), // 10 FPS
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rational(15, 1), // 15 FPS
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rational(24000, 1001), // 23.976 FPS
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rational(24, 1), // 24 FPS
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rational(25, 1), // 25 FPS
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rational(30000, 1001), // 29.97 FPS
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rational(30, 1), // 30 FPS
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rational(48000, 1001), // 47.952 FPS
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rational(48, 1), // 48 FPS
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rational(50, 1), // 50 FPS
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rational(60000, 1001), // 59.94 FPS
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rational(60, 1) // 60 FPS
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};
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const QVector<int> VideoParams::kSupportedDividers = {1, 2, 3, 4, 6, 8, 12, 16};
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const QVector<rational> VideoParams::kStandardPixelAspects = {
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VideoParams::kPixelAspectSquare,
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VideoParams::kPixelAspectNTSCStandard,
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VideoParams::kPixelAspectNTSCWidescreen,
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VideoParams::kPixelAspectPALStandard,
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VideoParams::kPixelAspectPALWidescreen,
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VideoParams::kPixelAspect1080Anamorphic
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};
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VideoParams::VideoParams() :
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width_(0),
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height_(0),
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depth_(0),
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format_(kFormatInvalid),
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channel_count_(0),
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interlacing_(Interlacing::kInterlaceNone)
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{
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}
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VideoParams::VideoParams(int width, int height, Format format, int nb_channels, const rational& pixel_aspect_ratio, Interlacing interlacing, int divider) :
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width_(width),
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height_(height),
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depth_(0),
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format_(format),
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channel_count_(nb_channels),
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pixel_aspect_ratio_(pixel_aspect_ratio),
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interlacing_(interlacing),
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divider_(divider)
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{
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calculate_effective_size();
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validate_pixel_aspect_ratio();
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}
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VideoParams::VideoParams(int width, int height, int depth, Format format, int nb_channels, const rational &pixel_aspect_ratio, VideoParams::Interlacing interlacing, int divider) :
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width_(width),
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height_(height),
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depth_(depth),
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format_(format),
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channel_count_(nb_channels),
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pixel_aspect_ratio_(pixel_aspect_ratio),
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interlacing_(interlacing),
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divider_(divider)
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{
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calculate_effective_size();
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validate_pixel_aspect_ratio();
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}
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VideoParams::VideoParams(int width, int height, const rational &time_base, Format format, int nb_channels, const rational& pixel_aspect_ratio, Interlacing interlacing, int divider) :
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width_(width),
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height_(height),
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depth_(0),
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time_base_(time_base),
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format_(format),
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channel_count_(nb_channels),
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pixel_aspect_ratio_(pixel_aspect_ratio),
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interlacing_(interlacing),
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divider_(divider)
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{
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calculate_effective_size();
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validate_pixel_aspect_ratio();
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}
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int VideoParams::generate_auto_divider(qint64 width, qint64 height)
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{
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// Arbitrary pixel count (from 640x360)
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const int target_res = 230400;
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qint64 megapixels = width * height;
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double squared_divider = double(megapixels) / double(target_res);
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double divider = qSqrt(squared_divider);
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if (divider <= kSupportedDividers.first()) {
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return kSupportedDividers.first();
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} else if (divider >= kSupportedDividers.last()) {
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return kSupportedDividers.last();
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} else {
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for (int i=1; i<kSupportedDividers.size(); i++) {
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int prev_divider = kSupportedDividers.at(i-1);
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int next_divider = kSupportedDividers.at(i);
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if (divider >= prev_divider && divider <= next_divider) {
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double prev_diff = qAbs(prev_divider - divider);
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double next_diff = qAbs(next_divider - divider);
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if (prev_diff < next_diff) {
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return prev_divider;
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} else {
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return next_divider;
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}
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}
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}
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// "Safe" fallback
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return 2;
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}
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}
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bool VideoParams::operator==(const VideoParams &rhs) const
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{
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return width() == rhs.width()
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&& height() == rhs.height()
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&& time_base() == rhs.time_base()
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&& format() == rhs.format()
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&& pixel_aspect_ratio() == rhs.pixel_aspect_ratio()
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&& divider() == rhs.divider();
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}
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bool VideoParams::operator!=(const VideoParams &rhs) const
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{
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return !(*this == rhs);
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}
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int VideoParams::GetBytesPerChannel(VideoParams::Format format)
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{
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switch (format) {
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case kFormatInvalid:
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case kFormatCount:
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break;
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case kFormatUnsigned8:
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return 1;
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case kFormatUnsigned16:
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case kFormatFloat16:
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return 2;
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case kFormatFloat32:
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return 4;
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}
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return 0;
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}
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int VideoParams::GetBytesPerPixel(VideoParams::Format format, int channels)
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{
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return GetBytesPerChannel(format) * channels;
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}
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bool VideoParams::FormatIsFloat(VideoParams::Format format)
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{
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switch (format) {
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case kFormatFloat16:
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case kFormatFloat32:
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return true;
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case kFormatUnsigned8:
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case kFormatUnsigned16:
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case kFormatInvalid:
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case kFormatCount:
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break;
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}
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return false;
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}
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QString VideoParams::GetFormatName(VideoParams::Format format)
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{
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switch (format) {
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case kFormatUnsigned8:
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return QCoreApplication::translate("VideoParams", "8-bit");
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case kFormatUnsigned16:
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return QCoreApplication::translate("VideoParams", "16-bit Integer");
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case kFormatFloat16:
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return QCoreApplication::translate("VideoParams", "Half-Float (16-bit)");
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case kFormatFloat32:
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return QCoreApplication::translate("VideoParams", "Full-Float (32-bit)");
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case kFormatInvalid:
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case kFormatCount:
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break;
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}
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return QCoreApplication::translate("VideoParams", "Unknown (0x%1)").arg(format, 0, 16);
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}
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void VideoParams::calculate_effective_size()
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{
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effective_width_ = GetScaledDimension(width(), divider_);
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effective_height_ = GetScaledDimension(height(), divider_);
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effective_depth_ = GetScaledDimension(depth(), divider_);
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}
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void VideoParams::validate_pixel_aspect_ratio()
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{
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if (pixel_aspect_ratio_.isNull()) {
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pixel_aspect_ratio_ = 1;
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}
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}
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bool VideoParams::is_valid() const
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{
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return (width() > 0
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&& height() > 0
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&& !pixel_aspect_ratio_.isNull()
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&& format_ > kFormatInvalid && format_ < kFormatCount
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&& channel_count_ > 0);
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}
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QString VideoParams::FrameRateToString(const rational &frame_rate)
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{
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return QCoreApplication::translate("VideoParams", "%1 FPS").arg(frame_rate.toDouble());
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}
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QStringList VideoParams::GetStandardPixelAspectRatioNames()
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{
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QStringList strings = {
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QCoreApplication::translate("VideoParams", "Square Pixels (%1)"),
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QCoreApplication::translate("VideoParams", "NTSC Standard (%1)"),
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QCoreApplication::translate("VideoParams", "NTSC Widescreen (%1)"),
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QCoreApplication::translate("VideoParams", "PAL Standard (%1)"),
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QCoreApplication::translate("VideoParams", "PAL Widescreen (%1)"),
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QCoreApplication::translate("VideoParams", "HD Anamorphic 1080 (%1)")
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};
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// Format each
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for (int i=0; i<strings.size(); i++) {
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strings.replace(i, FormatPixelAspectRatioString(strings.at(i), kStandardPixelAspects.at(i)));
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}
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return strings;
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}
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QString VideoParams::FormatPixelAspectRatioString(const QString &format, const rational &ratio)
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{
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return format.arg(QString::number(ratio.toDouble(), 'f', 4));
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}
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int VideoParams::GetScaledDimension(int dim, int divider)
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{
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return dim / divider;
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}
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OLIVE_NAMESPACE_EXIT
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