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/*
Copyright (C) 2013-2021 Carl Hetherington <cth@carlh.net>
This file is part of DCP-o-matic.
DCP-o-matic 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 2 of the License, or
(at your option) any later version.
DCP-o-matic 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 DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
*/
#include "colour_conversion.h"
#include "config.h"
#include "digester.h"
#include "util.h"
#include <dcp/chromaticity.h>
#include <dcp/gamma_transfer_function.h>
#include <dcp/identity_transfer_function.h>
#include <dcp/modified_gamma_transfer_function.h>
#include <dcp/raw_convert.h>
#include <dcp/s_gamut3_transfer_function.h>
#include <dcp/warnings.h>
#include <libcxml/cxml.h>
LIBDCP_DISABLE_WARNINGS
#include <libxml++/libxml++.h>
LIBDCP_ENABLE_WARNINGS
#include <iostream>
#include "i18n.h"
using std::cout;
using std::dynamic_pointer_cast;
using std::list;
using std::make_shared;
using std::shared_ptr;
using std::string;
using std::vector;
using boost::optional;
using dcp::raw_convert;
vector<PresetColourConversion> PresetColourConversion::_presets;
ColourConversion::ColourConversion ()
: dcp::ColourConversion (dcp::ColourConversion::srgb_to_xyz ())
{
}
ColourConversion::ColourConversion (dcp::ColourConversion conversion_)
: dcp::ColourConversion (conversion_)
{
}
ColourConversion::ColourConversion (cxml::NodePtr node, int version)
{
shared_ptr<dcp::TransferFunction> in;
if (version >= 32) {
/* Version 2.x */
auto in_node = node->node_child ("InputTransferFunction");
auto in_type = in_node->string_child ("Type");
if (in_type == "Gamma") {
_in = make_shared<dcp::GammaTransferFunction>(in_node->number_child<double> ("Gamma"));
} else if (in_type == "ModifiedGamma") {
_in = make_shared<dcp::ModifiedGammaTransferFunction>(
in_node->number_child<double>("Power"),
in_node->number_child<double>("Threshold"),
in_node->number_child<double>("A"),
in_node->number_child<double>("B")
);
} else if (in_type == "SGamut3") {
_in = make_shared<dcp::SGamut3TransferFunction>();
}
} else {
/* Version 1.x */
if (node->bool_child ("InputGammaLinearised")) {
_in.reset (new dcp::ModifiedGammaTransferFunction (node->number_child<double> ("InputGamma"), 0.04045, 0.055, 12.92));
} else {
_in.reset (new dcp::GammaTransferFunction (node->number_child<double> ("InputGamma")));
}
}
_yuv_to_rgb = static_cast<dcp::YUVToRGB>(node->optional_number_child<int>("YUVToRGB").get_value_or(static_cast<int>(dcp::YUVToRGB::REC601)));
auto m = node->node_children ("Matrix");
if (!m.empty ()) {
/* Read in old <Matrix> nodes and convert them to chromaticities */
boost::numeric::ublas::matrix<double> C (3, 3);
for (auto i: m) {
int const ti = i->number_attribute<int>("i");
int const tj = i->number_attribute<int>("j");
C(ti, tj) = raw_convert<double>(i->content());
}
double const rd = C(0, 0) + C(1, 0) + C(2, 0);
_red = dcp::Chromaticity (C(0, 0) / rd, C(1, 0) / rd);
double const gd = C(0, 1) + C(1, 1) + C(2, 1);
_green = dcp::Chromaticity (C(0, 1) / gd, C(1, 1) / gd);
double const bd = C(0, 2) + C(1, 2) + C(2, 2);
_blue = dcp::Chromaticity (C(0, 2) / bd, C(1, 2) / bd);
double const wd = C(0, 0) + C(0, 1) + C(0, 2) + C(1, 0) + C(1, 1) + C(1, 2) + C(2, 0) + C(2, 1) + C(2, 2);
_white = dcp::Chromaticity ((C(0, 0) + C(0, 1) + C(0, 2)) / wd, (C(1, 0) + C(1, 1) + C(1, 2)) / wd);
} else {
/* New-style chromaticities */
_red = dcp::Chromaticity (node->number_child<double> ("RedX"), node->number_child<double> ("RedY"));
_green = dcp::Chromaticity (node->number_child<double> ("GreenX"), node->number_child<double> ("GreenY"));
_blue = dcp::Chromaticity (node->number_child<double> ("BlueX"), node->number_child<double> ("BlueY"));
_white = dcp::Chromaticity (node->number_child<double> ("WhiteX"), node->number_child<double> ("WhiteY"));
if (node->optional_node_child ("AdjustedWhiteX")) {
_adjusted_white = dcp::Chromaticity (
node->number_child<double> ("AdjustedWhiteX"), node->number_child<double> ("AdjustedWhiteY")
);
}
}
auto gamma = node->optional_number_child<double>("OutputGamma");
if (gamma) {
_out = make_shared<dcp::GammaTransferFunction>(node->number_child<double>("OutputGamma"));
} else {
_out = make_shared<dcp::IdentityTransferFunction>();
}
}
boost::optional<ColourConversion>
ColourConversion::from_xml (cxml::NodePtr node, int version)
{
if (!node->optional_node_child ("InputTransferFunction")) {
return boost::optional<ColourConversion> ();
}
return ColourConversion (node, version);
}
void
ColourConversion::as_xml(xmlpp::Element* element) const
{
auto in_node = cxml::add_child(element, "InputTransferFunction");
if (dynamic_pointer_cast<const dcp::GammaTransferFunction> (_in)) {
auto tf = dynamic_pointer_cast<const dcp::GammaTransferFunction> (_in);
cxml::add_text_child(in_node, "Type", "Gamma");
cxml::add_text_child(in_node, "Gamma", raw_convert<string>(tf->gamma()));
} else if (dynamic_pointer_cast<const dcp::ModifiedGammaTransferFunction> (_in)) {
auto tf = dynamic_pointer_cast<const dcp::ModifiedGammaTransferFunction> (_in);
cxml::add_text_child(in_node, "Type", "ModifiedGamma");
cxml::add_text_child(in_node, "Power", raw_convert<string>(tf->power ()));
cxml::add_text_child(in_node, "Threshold", raw_convert<string>(tf->threshold ()));
cxml::add_text_child(in_node, "A", raw_convert<string>(tf->A()));
cxml::add_text_child(in_node, "B", raw_convert<string>(tf->B()));
} else if (dynamic_pointer_cast<const dcp::SGamut3TransferFunction>(_in)) {
cxml::add_text_child(in_node, "Type", "SGamut3");
}
cxml::add_text_child(element, "YUVToRGB", raw_convert<string>(static_cast<int>(_yuv_to_rgb)));
cxml::add_text_child(element, "RedX", raw_convert<string>(_red.x));
cxml::add_text_child(element, "RedY", raw_convert<string>(_red.y));
cxml::add_text_child(element, "GreenX", raw_convert<string>(_green.x));
cxml::add_text_child(element, "GreenY", raw_convert<string>(_green.y));
cxml::add_text_child(element, "BlueX", raw_convert<string>(_blue.x));
cxml::add_text_child(element, "BlueY", raw_convert<string>(_blue.y));
cxml::add_text_child(element, "WhiteX", raw_convert<string>(_white.x));
cxml::add_text_child(element, "WhiteY", raw_convert<string>(_white.y));
if (_adjusted_white) {
cxml::add_text_child(element, "AdjustedWhiteX", raw_convert<string>(_adjusted_white.get().x));
cxml::add_text_child(element, "AdjustedWhiteY", raw_convert<string>(_adjusted_white.get().y));
}
if (auto gf = dynamic_pointer_cast<const dcp::GammaTransferFunction>(_out)) {
cxml::add_text_child(element, "OutputGamma", raw_convert<string>(gf->gamma()));
}
}
optional<size_t>
ColourConversion::preset () const
{
auto presets = PresetColourConversion::all ();
size_t i = 0;
while (i < presets.size() && presets[i].conversion != *this) {
++i;
}
if (i >= presets.size ()) {
return {};
}
return i;
}
string
ColourConversion::identifier () const
{
Digester digester;
if (dynamic_pointer_cast<const dcp::GammaTransferFunction> (_in)) {
shared_ptr<const dcp::GammaTransferFunction> tf = dynamic_pointer_cast<const dcp::GammaTransferFunction> (_in);
digester.add (tf->gamma ());
} else if (dynamic_pointer_cast<const dcp::ModifiedGammaTransferFunction> (_in)) {
shared_ptr<const dcp::ModifiedGammaTransferFunction> tf = dynamic_pointer_cast<const dcp::ModifiedGammaTransferFunction> (_in);
digester.add (tf->power ());
digester.add (tf->threshold ());
digester.add (tf->A ());
digester.add (tf->B ());
}
digester.add (_red.x);
digester.add (_red.y);
digester.add (_green.x);
digester.add (_green.y);
digester.add (_blue.x);
digester.add (_blue.y);
digester.add (_white.x);
digester.add (_white.y);
if (_adjusted_white) {
digester.add (_adjusted_white.get().x);
digester.add (_adjusted_white.get().y);
}
digester.add(static_cast<int>(_yuv_to_rgb));
auto gf = dynamic_pointer_cast<const dcp::GammaTransferFunction> (_out);
if (gf) {
digester.add (gf->gamma ());
}
return digester.get ();
}
PresetColourConversion::PresetColourConversion ()
: name (_("Untitled"))
{
}
PresetColourConversion::PresetColourConversion (string n, string i, dcp::ColourConversion conversion_)
: conversion (conversion_)
, name (n)
, id (i)
{
}
PresetColourConversion::PresetColourConversion (cxml::NodePtr node, int version)
: conversion (node, version)
, name (node->string_child ("Name"))
{
}
bool
operator== (ColourConversion const & a, ColourConversion const & b)
{
return a.about_equal (b, 1e-6);
}
bool
operator!= (ColourConversion const & a, ColourConversion const & b)
{
return !(a == b);
}
bool
operator== (PresetColourConversion const & a, PresetColourConversion const & b)
{
return a.name == b.name && a.conversion == b.conversion;
}
void
PresetColourConversion::setup_colour_conversion_presets ()
{
_presets.push_back (PresetColourConversion (_("sRGB"), "srgb", dcp::ColourConversion::srgb_to_xyz ()));
_presets.push_back (PresetColourConversion (_("Rec. 601"), "rec601", dcp::ColourConversion::rec601_to_xyz ()));
_presets.push_back (PresetColourConversion (_("Rec. 709"), "rec709", dcp::ColourConversion::rec709_to_xyz ()));
_presets.push_back (PresetColourConversion (_("P3"), "p3", dcp::ColourConversion::p3_to_xyz ()));
_presets.push_back (PresetColourConversion (_("Rec. 1886"), "rec1886", dcp::ColourConversion::rec1886_to_xyz ()));
_presets.push_back (PresetColourConversion (_("Rec. 2020"), "rec2020", dcp::ColourConversion::rec2020_to_xyz ()));
_presets.push_back (PresetColourConversion (_("S-Gamut3/S-Log3"), "sgamut3", dcp::ColourConversion::s_gamut3_to_xyz ()));
}
PresetColourConversion
PresetColourConversion::from_id (string s)
{
for (auto const& i: _presets) {
if (i.id == s) {
return i;
}
}
DCPOMATIC_ASSERT (false);
}
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